Flowering time is a crucial agronomic trait that affects the adaptability and yield of soybeans.Despite extensive research aimed at uncovering the genetic basis of flowering time in soybean germplasm,investigations in...Flowering time is a crucial agronomic trait that affects the adaptability and yield of soybeans.Despite extensive research aimed at uncovering the genetic basis of flowering time in soybean germplasm,investigations involving the soybean germplasm from Northeast China have been limited.Here,we elucidated the genetic basis of days to flowering(DTF)in the soybean germplasm grown in Northeast China by employing an integrated strategy,including association mapping,quantitative trait locus(QTL)analysis,haplotype analysis,and candidate gene analysis.Overall,the genome-wide association study(GWAS)revealed 15 single-nucleotide polymorphisms(SNPs)significantly linked with DTF across six GWAS models and four individual environments plus a combined environment(CE).Five stable QTL were identified,among which four(viz.,qDTF8,qDTF12,qDTF15.1,and qDTF15.2)are reported for the first time,and the remaining one(qDTF19)was detected in previous studies.On the basis of the findings of expression and haplotype analysis,fourteen putative candidate genes were detected across the genomic intervals of these five QTL.Among these genes,Glyma.19 g197600 and Glyma.19 g200700 were confirmed through both expression and haplotype analysis.Moreover,the relationship of the haplotypes with gene expression indicates that Glyma.19 g197600 is a negative regulator of early flowering,thereby providing evidence of its role in flowering.This study reveals potential genetic loci and genes that could facilitate the expansion of soybean cultivation into regions with short growing seasons and long photoperiodic conditions across the globe.展开更多
Marine collagen is emerging as a transformative natural-derived material in regenerative medicine.Unlike traditional mammalian collagen,it has unique structural properties(e.g.,a distinct amino acid profile)that confe...Marine collagen is emerging as a transformative natural-derived material in regenerative medicine.Unlike traditional mammalian collagen,it has unique structural properties(e.g.,a distinct amino acid profile)that confer high biocompatibility and low immunogenicity,along with excellent antibacterial activity and a sus-tainable supply chain that eliminates zoonotic disease risks.This review establishes the foundational rationale for this shift by conducting a comprehensive analysis of the structure-function relationships underpinning the regenerative superiority of marine collagen.We critically evaluate how advanced manufacturing technologies(e.g.,3D bioprinting,electrospinning)leverage these intrinsic properties to deliver transformative therapeutic outcomes,exemplified by biomechanically optimized cartilage scaffolds and immunomodulatory wound matrices.Our review also delineates actionable pathways for clinical translation,addressing challenges in scalability,regulatory compliance,and long-term stability.This review uniquely integrates structure-function relationships with green industrialization pathways,offering an actionable framework for clinical translation of marine collagen,which repositions marine collagen from a mere alternative to an indispensable platform material,poised to drive the next generation of regenerative therapies.展开更多
Aiming at developing Mg alloys with good strength and ductility,an inverse temperature field equal channel angular pressing(ITF-ECAP)technique was proposed to realize the severe plastic processing of Mg−8Bi−1Al−1Zn(BA...Aiming at developing Mg alloys with good strength and ductility,an inverse temperature field equal channel angular pressing(ITF-ECAP)technique was proposed to realize the severe plastic processing of Mg−8Bi−1Al−1Zn(BAZ811,wt.%)alloy at low temperature of~80°C.As a result,a microstructure consisting of ultrafine grains having an average grain size(AGS)of~506 nm and fine grains with an AGS of~1.36μm was constructed in BAZ811 alloy through 4-pass ITF-ECAP processing.Additionally,a large amount of nano-sized Mg3Bi2 phase precipitated during ITF-ECAP processing,and the micro-scale Mg3Bi2 particles were greatly refined.Furthermore,the ITF-ECAPed BAZ811 alloy exhibits an ultra-high strength−ductility synergy with yield strength and elongation of(381.5±4.2)MPa and(21.4±1.6)%,respectively.High strength stems from grain boundary,precipitate,and dislocation strengthening;good ductility arises from high intergranular strain coordination and weak texture plasticization.展开更多
The exponential growth of video content has driven significant advancements in video summarization techniques in recent years. Breakthroughs in deep learning have been particularly transformative, enabling more effect...The exponential growth of video content has driven significant advancements in video summarization techniques in recent years. Breakthroughs in deep learning have been particularly transformative, enabling more effective detection of key information and creating new possibilities for video synopsis. To summarize recent progress and accelerate research in this field,this paper provides a comprehensive review of deep learningbased video summarization methods developed over the past decade. We begin by examining the research landscape of video abstraction technologies and identifying core challenges in video summarization. Subsequently, we systematically analyze prevailing deep learning frameworks and methodologies employed in current video summarization systems, offering researchers a clear roadmap of the field's evolution. Unlike previous review works,we first classify research papers based on the structural hierarchy of the video(from frame-level to shot-level to video-level),then further categorize them according to the summary backbone model(feature extraction and spatiotemporal modeling).This approach provides a more systematic and hierarchical organization of the documents. Following this comprehensive review,we summarize the benchmark datasets and evaluation metrics commonly employed in the field. Finally, we analyze persistent challenges and propose insightful directions for future research,providing a forward-looking perspective on video summarization technologies. This systematic literature review is of great reference value to new researchers exploring the fields of deep learning and video summarization.展开更多
With the application and development of big data technology,blockchain technology has emerged as a key solution for optimizing traditional rice supply chains and ensuring food security,leveraging its traceability and ...With the application and development of big data technology,blockchain technology has emerged as a key solution for optimizing traditional rice supply chains and ensuring food security,leveraging its traceability and anti-counterfeiting features in supply chain applications.This paper analyzes the compatibility and feasibility of blockchain technology with rice supply chains based on Feng Xingyuan’s"Institution-Knowledge-Competition"theory.It proposes a tripartite financial framework,"Commercial NFT Warehouse Receipt Pledging,Cooperative Rice Point Mutual Aid,and Policy-Driven Smart Contract Subsidies",to reduce transaction costs across the entire closed-loop process of contract signing,fulfillment,and breach.Practical case studies validate the"dual-threshold"effect of government subsidy intensity and core node endorsement on technology implementation.Finally,targeted risk prevention strategies are proposed,addressing technical,financial,and institutional risks.The study demonstrates that blockchain technology significantly enhances supply chain node efficiency,with future value further unlocked through measures like technological integration and currency fusion,offering actionable solutions for food security.展开更多
Due to the difficulty of luminescence intensity optimization and color control,the research on the regulatable warm white light emitting devices and fluorescent labels for multi-color detection is ongoing.The Ln3+-...Due to the difficulty of luminescence intensity optimization and color control,the research on the regulatable warm white light emitting devices and fluorescent labels for multi-color detection is ongoing.The Ln3+-Bi2(PTA)3/Bi2O3phosphors with rod-shaped structure were prepared by one-step hydrothermal method,and the incorporation of Bi2O3and terephthalic acid(PTA)ligand effectively magnifies the absorption ability for the photons to enhance the emission intensity.The mono lanthanide-doped DyBi2(PTA)3/Bi2O3exhibits pure cool white light,and it can be transformed to warm white light with the codoped Eu3+amount increasing.Eu3+-Tb3+-Bi2(PTA)3/Bi2O3can emit red and green light,which is used as the multi-color fluorescence labeling,and the mixed formed yellow light fills the blank of the yellow lighting device.展开更多
Electroencephalography-based brain-computer interfaces have revolutionized the integration of neural signals with technological systems,offering transformative solutions across neuroscience,biomedical engineering,and ...Electroencephalography-based brain-computer interfaces have revolutionized the integration of neural signals with technological systems,offering transformative solutions across neuroscience,biomedical engineering,and clinical practice.This review systematically analyzes advancements in electroencephalography-based brain-computer interface architectures,emphasizing four pillars,namely signal acquisition,paradigm design,decoding algorithms,and diverse applications.The aim is to bridge the gap between technology and application and guide future research.In signal acquisition,noninvasive systems using wet,dry,and semi-dry electrodes are more comfortable and gentler on the skin compared to traditional methods.However,ensuring stable signal quality over long periods of time remains a challenge.Minimally invasive approaches,such as microneedle arrays and endovascular probes,achieve near-invasive signal fidelity without major surgery.Paradigm design explores task-specific neural encoders.Although motor imagery paradigms are widely used in rehabilitation,they require weeks of user training.Steady-state visually evoked potential and P300 speller paradigms enable rapid calibration,but cause visual and cognitive fatigue.Advanced systems currently combine electroencephalography with electromyography or eyetracking to better handle real-world tasks.Decoding algorithms have advanced through Riemannian geometry for improved noise filtering,deep learning architectures for automated spatiotemporal feature extraction,and transfer learning frameworks to minimize cross-subject calibration.However,challenges remain in managing inconsistent electroencephalography,reducing processing demands,and ensuring compatibility across different electroencephalography devices.Clinical trials reveal a predominant focus on stroke rehabilitation,while emerging frontiers include astronaut neuro-monitoring in space exploration.Challenges include improving signal accuracy,minimizing movement interference,addressing ethical data concerns,and ensuring real-world use.Future advancements focus on biocompatible nanomaterials,adaptive algorithms,and multimodal integration,positioning electroencephalography-based brain-computer interfaces as pivotal tools in next-generation neurotechnology.展开更多
The search for non-ergodic mechanisms in quantum many-body systems has become a frontier area of research in non-equilibrium physics.In this work,we introduce Hilbert subspace imprint(HSI)-a new mechanism that enables...The search for non-ergodic mechanisms in quantum many-body systems has become a frontier area of research in non-equilibrium physics.In this work,we introduce Hilbert subspace imprint(HSI)-a new mechanism that enables evasion of thermalization,standing as an independent non-ergodic mechanism alongside quantum many-body scars(QMBS)and Hilbert space fragmentation(HSF).HSI manifests when initial states overlap exclusively with a polynomial scaling(with system size)set of eigenstates.We demonstrate this phenomenon through two distinct approaches:weak symmetry breaking and initial state engineering.In the former case,we observe that ferromagnetic states including those with a single spin-flip display non-thermal behavior under weak U(1)breaking,while antiferromag-netic states thermalize.In contrast,the Z2-symmetric model shows thermalization for both ferromagnetic and antiferromagnetic states.In the latter case,we engineer the initial state prepared by shallow quantum circuits that enhance the overlap with the small target subspace.展开更多
Cholangiocarcinoma(CCA)is characterized by high invasiveness,early metastasis,and chemotherapy resistance,with a 5-year survival rate persistently below 20%.Current therapies are limited to surgery and a few chemother...Cholangiocarcinoma(CCA)is characterized by high invasiveness,early metastasis,and chemotherapy resistance,with a 5-year survival rate persistently below 20%.Current therapies are limited to surgery and a few chemotherapeutic options,highlighting an urgent need for actionable molecular targets and personalized strategies.In the recent issue of World Journal of Gastrointestinal Oncology,Hu et al report that glycochenodeoxycholic acid activates yes-associated protein(YAP)by inhibiting mammalian Ste20-like kinases/large tumor suppressor kinases(MST/LATS)phosphorylation,thereby promoting proliferation,invasion,and suppressing apoptosis,whereas deoxycholic acid enhances MST/LATS phosphorylation to block YAP nuclear entry,inhibiting tumor growth and inducing apoptosis.Given that the conversion between conjugated and unconjugated bile acids is fundamentally governed by intestinal microbial metabolism,this finding underscores the critical regulatory role of the gut microbiota.YAP modulators can reverse these bile-acid effects in both directions,establishing the“bile acid-Hippo-YAP”axis as an actionable driver.This study is the first to demonstrate the opposing roles of these two bile acids within the same model system,providing a mechanistic basis for CCA heterogeneity and suggesting that identifying bile acid biomarkers,manipulating the gut microbiota-bile acid metabolism or combining YAP-targeted drugs could offer novel strategies to overcome the therapeutic bottleneck in CCA.However,the use of a single cell line,one animal model,and the lack of immune microenvironment data limit generalizability;other bile acid species and cross-talk pathways were not explored.The commentary concludes that future work should further validate these findings.展开更多
BACKGROUND Locomotive syndrome(LS),a criterion capable of evaluating physical function at an earlier stage,has been less studied in relation to mild cognitive impairment(MCI).Clarifying the correlation between LS stat...BACKGROUND Locomotive syndrome(LS),a criterion capable of evaluating physical function at an earlier stage,has been less studied in relation to mild cognitive impairment(MCI).Clarifying the correlation between LS status and MCI in geriatric cancer patients may aid in identifying early risks for cognitive and motor impairments,providing new insights into maintaining patient independence.AIM To explore risk factors and the correlation between MCI and LS in geriatric cancer patients.METHODS A total of 467 geriatric cancer patients admitted to our hospital from July 2024 to June 2025 were enrolled.MCI was assessed using the Mini Mental State Examination,while locomotive function was evaluated using the Geriatric Locomotive Function Scale-25.Univariate analysis was conducted to evaluate differences in MCI and LS among geriatric cancer patients with different clinical characteristics.Logistic regression was performed to identify independent risk factors.Spearman correlation analysis was employed to assess the relationship between MCI and LS.RESULTS The prevalence of LS was 58.0%,and that of MCI was 30.5%.Logistic regression analysis indicated that age,number of chronic comorbidities,educational level,and MCI were independent risk factors for LS.Age,number of chronic comorbidities,and LS were risk factors for MCI.Spearman correlation analysis revealed a negative correlation between Geriatric Locomotive Function Scale-25 and Mini Mental State Examination scores(r=-0.436,P<0.001).CONCLUSION A significant correlation exists between MCI and LS in geriatric cancer patients.Clinical management and nursing care should concurrently address cognitive impairment and LS to improve patients’overall quality of life and prognosis.展开更多
Small object detection has been a focus of attention since the emergence of deep learning-based object detection.Although classical object detection frameworks have made significant contributions to the development of...Small object detection has been a focus of attention since the emergence of deep learning-based object detection.Although classical object detection frameworks have made significant contributions to the development of object detection,there are still many issues to be resolved in detecting small objects due to the inherent complexity and diversity of real-world visual scenes.In particular,the YOLO(You Only Look Once)series of detection models,renowned for their real-time performance,have undergone numerous adaptations aimed at improving the detection of small targets.In this survey,we summarize the state-of-the-art YOLO-based small object detection methods.This review presents a systematic categorization of YOLO-based approaches for small-object detection,organized into four methodological avenues,namely attention-based feature enhancement,detection-head optimization,loss function,and multi-scale feature fusion strategies.We then examine the principal challenges addressed by each category.Finally,we analyze the performance of thesemethods on public benchmarks and,by comparing current approaches,identify limitations and outline directions for future research.展开更多
Objective:Cardiovascular diseases pose a major public health challenge in China,particularly in northern frigid regions where environmental stressors and limited access to healthcare access exacerbate disease risk.Bot...Objective:Cardiovascular diseases pose a major public health challenge in China,particularly in northern frigid regions where environmental stressors and limited access to healthcare access exacerbate disease risk.Both atrial fibrillation(AF)and hypertension are influenced by cold exposure.AF is a frequent cardiovascular complication of hypertension,yet their causal relationship remains incompletely defined.This study aimed to elucidate the mechanisms linking hypertension to AF in frigid regions,with an emphasis on identifying key genes driving disease progression.Methods:We analyzed clinical data from 29,786 patients hospitalized at the First Affiliated Hospital of Harbin Medical University.Multivariate logistic regression was used to assess the association between hypertension and AF,and Mendelian randomization(MR)analyses were performed using genome-wide association study(GWAS)datasets.Wholeblood expression quantitative trait locus(eQTL)analysis and pathway enrichment were applied to identify hypertension-related genes.Singlecell RNA sequencing data from AF patients and hypertensive rat models were used to validate the role of TIE1.In addition,gut microbiota GWAS data were integrated to explore microbial influences on hypertension.Results:Hypertension emerged as both an independent and causal risk factor for AF in frigid regions.Gene expression analyses identified TIE1 as a central mediator of hypertension-related effects,with elevated cardiomyocyte TIE1 expression associated with increased susceptibility to AF.In hypertensive rats,increased TIE1 expression correlated with higher AF incidence and enhanced inflammatory cytokine production,whereas cardiomyocyte-specific TIE1 knockdown reduced AF occurrence and attenuated atrial remodeling.Gut microbiota analysis further revealed that the abundance of Adlercreutzia was inversely correlated with TIE1 expression,suggesting a potential protective role mediated through microbial regulation of host gene expression.Conclusion:These findings establish a causal link between hypertension and AF in cold northern regions and identify TIE1 as a pivotal mediator of this association.Targeting TIE1 may represent a therapeutic strategy for hypertension-associated AF.Moreover,the identification of Adlercreutzia as a modulator of TIE1 underscores the potential of the gut microbiota in preventing cardiovascular complications in frigid regions and opens promising avenues for future interventions.展开更多
Extreme weather events have been identified as the top global risk for the upcoming decade,according to the Global Risk Report 2025.Between July and September 2024,four tropical cyclones with extreme characteristics m...Extreme weather events have been identified as the top global risk for the upcoming decade,according to the Global Risk Report 2025.Between July and September 2024,four tropical cyclones with extreme characteristics made landfall in China,highlighting the potential impacts of climate change on tropical cyclone activity.Super Typhoon Gaemi made landfall in Taiwan and Fujian provinces,setting record-breaking daily rainfall at 14 meteorological stations in Jiangxi,Hunan,and Liaoning provinces.As the strongest typhoon to make landfall in China during autumn,Yagi maintained super typhoon intensity when making landfall in Hainan,Guangdong provinces in China,and Quang Ninh Province in Vietnam.Typhoon Bebinca and Tropical Storm Pulasan made consecutive landfalls in Shanghai within four days,with Bebinca being the strongest typhoon to strike Shanghai and Jiangsu Province since 1949.The World Weather Attribution report indicates that,due to climate change,rainfall events like those from Super Typhoon Gaemi have become more frequent,now occurring every 20 years in the northern Philippines,every 5 years in Taiwan Province,and every 100 years in Hunan Province.In Taiwan and Hunan provinces,climate change has increased rainfall by 14%and 9%,respectively.It is suggested that exploring how climate change influences the extreme events of landfalling typhoons is an important area for future research.展开更多
To study the relationships between rock mass crack propagation and damage and confining pressure under blast impact loading during straight-hole cut blasting,tests were performed under different confining pressures.Th...To study the relationships between rock mass crack propagation and damage and confining pressure under blast impact loading during straight-hole cut blasting,tests were performed under different confining pressures.Then,the characteristics of rock mass crack development were analyzed,and the pressure resistance values of core samples before and after blasting were compared to study the trends of rock mass damage.Moreover,a three-dimensional numerical simulation model was established by LS-DYNA to analyze the stress wave propagation,cavity shape and crack propagation characteristics under different confining pressures.The propagation of rock blasting cracks is negatively correlated with the confining pressure.The greater the confining pressure,the shorter the crack development time.Additionally,the crack width is reduced from 0.4-1.7 to 0.04-1.4 mm,and the length is shortened from 280 to 120 mm.A comparison of the compressive strength revealed that blasting reduces the compressive strength of the rock mass.The greater the distance from the explosion source,the lower the degree of strength attenuation.An increase in the confining pressure can inhibit strength attenuation.Numerical simulations revealed that under the same confining pressure,the stress first peaks at the bottom of the blast hole.The greater the confining pressure,the longer the stress peak duration,the smaller the cavity volume,and the shorter the crack propagation length and depth.Under a confining pressure of 4 MPa,the longest crack was only 154.5 mm in length and 102 mm in depth.The research results provide a scientific basis for controlling rock damage and optimizing design in the excavation of deep rock roadways by blasting.展开更多
A novel precipitate-free Mg-0.1Sn anode with a homogeneous equal-axis grain structure was developed and rolled successfully at 573 K.Electrochemical test results indicate that the Mg-0.1Sn alloy exhibits enhanced anod...A novel precipitate-free Mg-0.1Sn anode with a homogeneous equal-axis grain structure was developed and rolled successfully at 573 K.Electrochemical test results indicate that the Mg-0.1Sn alloy exhibits enhanced anode dissolution kinetics.A Mg-air battery prepared using this anode exhibits a cell voltage of 1.626 V at 0.5 mA/cm2,reasonable anodic efficiency of 58.17%,and good specific energy of 1730.96 mW·h/g at 10 mA/cm2.This performance is attributed to the effective reactive anode surface,the suppressed chunk effect,and weak self-corrosion owing to the homogeneous basal texture.展开更多
Contrastive graph clustering(CGC)has become a prominent method for self-supervised representation learning by contrasting augmented graph data pairs.However,the performance of CGC methods critically depends on the cho...Contrastive graph clustering(CGC)has become a prominent method for self-supervised representation learning by contrasting augmented graph data pairs.However,the performance of CGC methods critically depends on the choice of data augmentation,which usually limits the capacity of network generalization.Besides,most existing methods characterize positive and negative samples based on the nodes themselves,ignoring the influence of neighbors with different hop numbers on the node.In this study,a novel self-cumulative contrastive graph clustering(SC-CGC)method is devised,which is capable of dynamically adjusting the influence of neighbors with different hops.Our intuition is that better neighbors are closer and distant ones are further away in their feature space,thus we can perform neighbor contrasting without data augmentation.To be specific,SC-CGC relies on two neural networks,i.e.,autoencoder network(AE)and graph autoencoder network(GAE),to encode the node information and graph structure,respectively.To make these two networks interact and learn from each other,a dynamic fusion mechanism is devised to transfer the knowledge learned by AE to the corresponding GAE layer by layer.Then,a self-cumulative contrastive loss function is designed to characterize the structural information by dynamically accumulating the influence of the nodes with different hops.Finally,our approach simultaneously refines the representation learning and clustering assignments in a self-supervised manner.Extensive experiments on 8 realistic datasets demonstrate that SC-CGC consistently performs better over SOTA techniques.The code is available at http://gffzz188fe103f8f1460asofbb0pu5xcxk6xbx.ffgz.tsg.suse.edu.cn/Xiaoqiang-Yan/JAS-SCCGC.展开更多
The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process.To further reconci...The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process.To further reconcile this contradiction,two Mg-0.1Sc-0.1Y-0.1Ag anodes with different residual strain distribution through extrusion with/without annealing are fabricated.The results indicate that annealing can significantly lessen the“pseudo-anode”regions,thereby changing the dissolution mode of the matrix and achieving an effective dissolution during discharge.Additionally,p-type semiconductor characteristic of discharge productfilm could suppress the self-corrosion reaction without reducing the polarization of anode.The magnesium-air battery utilizing annealed Mg-0.1Sc-0.1Y-0.1Ag as anode achieves a synergistic improvement in specific capacity(1388.89 mA h g-1)and energy density(1960.42 mW h g-1).This anode modification method accelerates the advancement of high efficiency and long lifespan magnesium-air batteries,offering renewable and cost-effective energy solutions for electronics and emergency equipment.展开更多
The microstructure and mechanical properties of 2524 Al alloy after quenching in liquid nitrogen(LN2)were investigated by TEM and compared with those of cold water quenching.The results show that the LN2 quenchi...The microstructure and mechanical properties of 2524 Al alloy after quenching in liquid nitrogen(LN2)were investigated by TEM and compared with those of cold water quenching.The results show that the LN2 quenching process effectively induces the formation of dislocation loops.These loops become large and unevenly distribute after aging for 15 min.Furthermore,such loops become rapidly immobilized by the precipitation of coarse S phases after 1 h aging.The alloy quenched in LN2 demonstrates superior peak hardness and displays a more rapid response to subsequent aging treatments compared with the cold water-quenched one.Despite the short aging time,LN2-quenched sample achieves tensile strength of 488 MPa.This enhanced strength is attributed to the strengthening effect of numerous finely dispersed Guinier-Preston-Bagaryatsky(GPB)zones,in conjunction with the inhomogeneous formation of S phase on the dislocation loops.展开更多
The poor mechanical properties of pure zinc(Zn)restrain its applications in orthopedics,which requires high loading capacity.Alloying with lithium(Li)element can enhance strength,however,the work-hardening rate is imp...The poor mechanical properties of pure zinc(Zn)restrain its applications in orthopedics,which requires high loading capacity.Alloying with lithium(Li)element can enhance strength,however,the work-hardening rate is impaired with increased Li content.Here,introducing scandium(Sc)into a low Li-containing Zn-0.1Li alloy could effectively refine its microstructure,reducing the average grain size from 10 to 4μm.The refinement in microstructure led to a significant improvement in tensile strength,im-proving from 257 MPa of Zn-0.1Li to 341 MPa of Zn-0.1Li-0.1Sc,meanwhile,the work-hardening rate remained positive during the whole plastic deformation stage.The addition of Sc-impaired elongation is due to numerous microcracks formed at the Zn/ScZn12interfaces,as well as in the large-sized ScZn12particles.Corrosion tests revealed an accelerated corrosion rate due to the galvanic effect between the Zn matrix and ScZn12phase.Even so,the Zn-0.1Li-1.0Sc alloy still exhibited superior biocompatibility with rat/mouse mesenchymal stem cells and close osteogenesis capacity to the original Zn-0.1Li alloy.These findings demonstrated that the addition of Sc in low Li-containing alloys could improve mechanical strength without sacrificing the work-hardening rate and biocompatibility.展开更多
基金supported by the National Natural Science Foundation of China(U21A20215 and 32572440)the Biological Breeding-National Science and Technology Major Project(2023ZD0403201)+1 种基金the National Key Research and Development Program of China(2022YFD1500503)Science and Technology Development Plan Project of Jilin Province of China(20230101151JC)。
摘要Flowering time is a crucial agronomic trait that affects the adaptability and yield of soybeans.Despite extensive research aimed at uncovering the genetic basis of flowering time in soybean germplasm,investigations involving the soybean germplasm from Northeast China have been limited.Here,we elucidated the genetic basis of days to flowering(DTF)in the soybean germplasm grown in Northeast China by employing an integrated strategy,including association mapping,quantitative trait locus(QTL)analysis,haplotype analysis,and candidate gene analysis.Overall,the genome-wide association study(GWAS)revealed 15 single-nucleotide polymorphisms(SNPs)significantly linked with DTF across six GWAS models and four individual environments plus a combined environment(CE).Five stable QTL were identified,among which four(viz.,qDTF8,qDTF12,qDTF15.1,and qDTF15.2)are reported for the first time,and the remaining one(qDTF19)was detected in previous studies.On the basis of the findings of expression and haplotype analysis,fourteen putative candidate genes were detected across the genomic intervals of these five QTL.Among these genes,Glyma.19 g197600 and Glyma.19 g200700 were confirmed through both expression and haplotype analysis.Moreover,the relationship of the haplotypes with gene expression indicates that Glyma.19 g197600 is a negative regulator of early flowering,thereby providing evidence of its role in flowering.This study reveals potential genetic loci and genes that could facilitate the expansion of soybean cultivation into regions with short growing seasons and long photoperiodic conditions across the globe.
基金supported by grants from the National Natural Sci-ence Foundation of China(T2222029,U23A20453,62127811,U21A20396,82402502)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1030000,XDB1150000,XDC0200000)+1 种基金the National Key Research and Development Program of China(2022YFA1104701,2024YFB4607800,2024YFA1108404)the Initiative Scientific Research Program of the Institute of Zoology(2023IOZ0101).
摘要Marine collagen is emerging as a transformative natural-derived material in regenerative medicine.Unlike traditional mammalian collagen,it has unique structural properties(e.g.,a distinct amino acid profile)that confer high biocompatibility and low immunogenicity,along with excellent antibacterial activity and a sus-tainable supply chain that eliminates zoonotic disease risks.This review establishes the foundational rationale for this shift by conducting a comprehensive analysis of the structure-function relationships underpinning the regenerative superiority of marine collagen.We critically evaluate how advanced manufacturing technologies(e.g.,3D bioprinting,electrospinning)leverage these intrinsic properties to deliver transformative therapeutic outcomes,exemplified by biomechanically optimized cartilage scaffolds and immunomodulatory wound matrices.Our review also delineates actionable pathways for clinical translation,addressing challenges in scalability,regulatory compliance,and long-term stability.This review uniquely integrates structure-function relationships with green industrialization pathways,offering an actionable framework for clinical translation of marine collagen,which repositions marine collagen from a mere alternative to an indispensable platform material,poised to drive the next generation of regenerative therapies.
基金supported by the National Natural Science Foundation of China(No.52265048)the Natural Science Foundation of Zhejiang Province,China(No.LMS25E050004)+5 种基金Gansu Provincial Science and Technology Major Project,China(Nos.22ZD6GA008,23ZDGA010)China Postdoctoral Science Foundation(No.2022M713656)Wenzhou Municipal Science and Technology Plan Project,China(No.G2023018)Innovation in Colleges and Universities of Gansu Province,China(No.2022A-025)Gansu Youth Science and Technology Fund,China(No.21JR7RA261)Talent Support Program of Hongliu Outstanding Youth Fund of Lanzhou University of Technology,China(No.062205)。
摘要Aiming at developing Mg alloys with good strength and ductility,an inverse temperature field equal channel angular pressing(ITF-ECAP)technique was proposed to realize the severe plastic processing of Mg−8Bi−1Al−1Zn(BAZ811,wt.%)alloy at low temperature of~80°C.As a result,a microstructure consisting of ultrafine grains having an average grain size(AGS)of~506 nm and fine grains with an AGS of~1.36μm was constructed in BAZ811 alloy through 4-pass ITF-ECAP processing.Additionally,a large amount of nano-sized Mg3Bi2 phase precipitated during ITF-ECAP processing,and the micro-scale Mg3Bi2 particles were greatly refined.Furthermore,the ITF-ECAPed BAZ811 alloy exhibits an ultra-high strength−ductility synergy with yield strength and elongation of(381.5±4.2)MPa and(21.4±1.6)%,respectively.High strength stems from grain boundary,precipitate,and dislocation strengthening;good ductility arises from high intergranular strain coordination and weak texture plasticization.
基金supported by UKRI(EP/Z000025/1)Horizon Europe Programme under the MSCA grant for the ACMod project(101130271)。
摘要The exponential growth of video content has driven significant advancements in video summarization techniques in recent years. Breakthroughs in deep learning have been particularly transformative, enabling more effective detection of key information and creating new possibilities for video synopsis. To summarize recent progress and accelerate research in this field,this paper provides a comprehensive review of deep learningbased video summarization methods developed over the past decade. We begin by examining the research landscape of video abstraction technologies and identifying core challenges in video summarization. Subsequently, we systematically analyze prevailing deep learning frameworks and methodologies employed in current video summarization systems, offering researchers a clear roadmap of the field's evolution. Unlike previous review works,we first classify research papers based on the structural hierarchy of the video(from frame-level to shot-level to video-level),then further categorize them according to the summary backbone model(feature extraction and spatiotemporal modeling).This approach provides a more systematic and hierarchical organization of the documents. Following this comprehensive review,we summarize the benchmark datasets and evaluation metrics commonly employed in the field. Finally, we analyze persistent challenges and propose insightful directions for future research,providing a forward-looking perspective on video summarization technologies. This systematic literature review is of great reference value to new researchers exploring the fields of deep learning and video summarization.
基金funded by 2024 National College Student Innovation and Entrepreneurship Training Program Project(202413906003).
摘要With the application and development of big data technology,blockchain technology has emerged as a key solution for optimizing traditional rice supply chains and ensuring food security,leveraging its traceability and anti-counterfeiting features in supply chain applications.This paper analyzes the compatibility and feasibility of blockchain technology with rice supply chains based on Feng Xingyuan’s"Institution-Knowledge-Competition"theory.It proposes a tripartite financial framework,"Commercial NFT Warehouse Receipt Pledging,Cooperative Rice Point Mutual Aid,and Policy-Driven Smart Contract Subsidies",to reduce transaction costs across the entire closed-loop process of contract signing,fulfillment,and breach.Practical case studies validate the"dual-threshold"effect of government subsidy intensity and core node endorsement on technology implementation.Finally,targeted risk prevention strategies are proposed,addressing technical,financial,and institutional risks.The study demonstrates that blockchain technology significantly enhances supply chain node efficiency,with future value further unlocked through measures like technological integration and currency fusion,offering actionable solutions for food security.
基金Project supported by Jilin Provincial Key Research and Development Plan Project(20220203168SF)Natural Science Foundation of Jilin Province(20240101348JC)。
摘要Due to the difficulty of luminescence intensity optimization and color control,the research on the regulatable warm white light emitting devices and fluorescent labels for multi-color detection is ongoing.The Ln3+-Bi2(PTA)3/Bi2O3phosphors with rod-shaped structure were prepared by one-step hydrothermal method,and the incorporation of Bi2O3and terephthalic acid(PTA)ligand effectively magnifies the absorption ability for the photons to enhance the emission intensity.The mono lanthanide-doped DyBi2(PTA)3/Bi2O3exhibits pure cool white light,and it can be transformed to warm white light with the codoped Eu3+amount increasing.Eu3+-Tb3+-Bi2(PTA)3/Bi2O3can emit red and green light,which is used as the multi-color fluorescence labeling,and the mixed formed yellow light fills the blank of the yellow lighting device.
基金supported by the Health and Wellness Science and Technology Project of Tianjin,No.RC20013(to CL)the Integrated Traditional Chinese and Western Medicine Research Projects of Tianjin,No.2019129(to CL)+1 种基金the Scientific Research Project of Tianjin Education Commission,No.2024ZXZD005(to JS)the Natural Science Foundation of Tianjin Science and Technology Bureau,No.25JCZDSN00010(to JS)。
摘要Electroencephalography-based brain-computer interfaces have revolutionized the integration of neural signals with technological systems,offering transformative solutions across neuroscience,biomedical engineering,and clinical practice.This review systematically analyzes advancements in electroencephalography-based brain-computer interface architectures,emphasizing four pillars,namely signal acquisition,paradigm design,decoding algorithms,and diverse applications.The aim is to bridge the gap between technology and application and guide future research.In signal acquisition,noninvasive systems using wet,dry,and semi-dry electrodes are more comfortable and gentler on the skin compared to traditional methods.However,ensuring stable signal quality over long periods of time remains a challenge.Minimally invasive approaches,such as microneedle arrays and endovascular probes,achieve near-invasive signal fidelity without major surgery.Paradigm design explores task-specific neural encoders.Although motor imagery paradigms are widely used in rehabilitation,they require weeks of user training.Steady-state visually evoked potential and P300 speller paradigms enable rapid calibration,but cause visual and cognitive fatigue.Advanced systems currently combine electroencephalography with electromyography or eyetracking to better handle real-world tasks.Decoding algorithms have advanced through Riemannian geometry for improved noise filtering,deep learning architectures for automated spatiotemporal feature extraction,and transfer learning frameworks to minimize cross-subject calibration.However,challenges remain in managing inconsistent electroencephalography,reducing processing demands,and ensuring compatibility across different electroencephalography devices.Clinical trials reveal a predominant focus on stroke rehabilitation,while emerging frontiers include astronaut neuro-monitoring in space exploration.Challenges include improving signal accuracy,minimizing movement interference,addressing ethical data concerns,and ensuring real-world use.Future advancements focus on biocompatible nanomaterials,adaptive algorithms,and multimodal integration,positioning electroencephalography-based brain-computer interfaces as pivotal tools in next-generation neurotechnology.
基金support by the Ministry of Science and Technology(Grant No.2022YFA1403900)the National Natural Science Foundation of China(Grant No.12494594)+4 种基金the New Cornerstone Investigator ProgramHY is also supported by the International Young Scientist Fellowship of Institute of Physics Chinese Academy of Sciences(Grant No.202407)SXZ acknowledges the support from the Quantum Science and Technology-National Science and Technology Major Project(Grant No.2024ZD0301700)the National Natural Science Foundation of China(Grant No.12574546)the Chinese Academy of Sciences(Grant Nos.XDB1680201 and YSBR-150).
摘要The search for non-ergodic mechanisms in quantum many-body systems has become a frontier area of research in non-equilibrium physics.In this work,we introduce Hilbert subspace imprint(HSI)-a new mechanism that enables evasion of thermalization,standing as an independent non-ergodic mechanism alongside quantum many-body scars(QMBS)and Hilbert space fragmentation(HSF).HSI manifests when initial states overlap exclusively with a polynomial scaling(with system size)set of eigenstates.We demonstrate this phenomenon through two distinct approaches:weak symmetry breaking and initial state engineering.In the former case,we observe that ferromagnetic states including those with a single spin-flip display non-thermal behavior under weak U(1)breaking,while antiferromag-netic states thermalize.In contrast,the Z2-symmetric model shows thermalization for both ferromagnetic and antiferromagnetic states.In the latter case,we engineer the initial state prepared by shallow quantum circuits that enhance the overlap with the small target subspace.
基金Supported by Youth Foundation of Henan Scientific Committee,No.202300410416Henan Province Medical Science,Technology Breakthrough Plan Project,No.LHGJ20190033.
摘要Cholangiocarcinoma(CCA)is characterized by high invasiveness,early metastasis,and chemotherapy resistance,with a 5-year survival rate persistently below 20%.Current therapies are limited to surgery and a few chemotherapeutic options,highlighting an urgent need for actionable molecular targets and personalized strategies.In the recent issue of World Journal of Gastrointestinal Oncology,Hu et al report that glycochenodeoxycholic acid activates yes-associated protein(YAP)by inhibiting mammalian Ste20-like kinases/large tumor suppressor kinases(MST/LATS)phosphorylation,thereby promoting proliferation,invasion,and suppressing apoptosis,whereas deoxycholic acid enhances MST/LATS phosphorylation to block YAP nuclear entry,inhibiting tumor growth and inducing apoptosis.Given that the conversion between conjugated and unconjugated bile acids is fundamentally governed by intestinal microbial metabolism,this finding underscores the critical regulatory role of the gut microbiota.YAP modulators can reverse these bile-acid effects in both directions,establishing the“bile acid-Hippo-YAP”axis as an actionable driver.This study is the first to demonstrate the opposing roles of these two bile acids within the same model system,providing a mechanistic basis for CCA heterogeneity and suggesting that identifying bile acid biomarkers,manipulating the gut microbiota-bile acid metabolism or combining YAP-targeted drugs could offer novel strategies to overcome the therapeutic bottleneck in CCA.However,the use of a single cell line,one animal model,and the lack of immune microenvironment data limit generalizability;other bile acid species and cross-talk pathways were not explored.The commentary concludes that future work should further validate these findings.
基金Supported by the Jiangsu Provincial Traditional Chinese Medicine Science and Technology Development Plan Project,No.MS2024063Scientific and Technological Achievements Promotion Project of Wuxi Municipal Health Commission Project Program,No.T202336+2 种基金Research Project on Hospital Management Innovation in Jiangsu Province,No.JSYGY-3-2024-601the Regional Medical Center Development Program under the partnership between Jiangnan University Affiliated Hospital and Donghai County People’s Hospital,No.DHBFH202501 and No.DHBFH202503the Wuxi Institute of Translational Medicine Project Program,No.LCYJ202336.
摘要BACKGROUND Locomotive syndrome(LS),a criterion capable of evaluating physical function at an earlier stage,has been less studied in relation to mild cognitive impairment(MCI).Clarifying the correlation between LS status and MCI in geriatric cancer patients may aid in identifying early risks for cognitive and motor impairments,providing new insights into maintaining patient independence.AIM To explore risk factors and the correlation between MCI and LS in geriatric cancer patients.METHODS A total of 467 geriatric cancer patients admitted to our hospital from July 2024 to June 2025 were enrolled.MCI was assessed using the Mini Mental State Examination,while locomotive function was evaluated using the Geriatric Locomotive Function Scale-25.Univariate analysis was conducted to evaluate differences in MCI and LS among geriatric cancer patients with different clinical characteristics.Logistic regression was performed to identify independent risk factors.Spearman correlation analysis was employed to assess the relationship between MCI and LS.RESULTS The prevalence of LS was 58.0%,and that of MCI was 30.5%.Logistic regression analysis indicated that age,number of chronic comorbidities,educational level,and MCI were independent risk factors for LS.Age,number of chronic comorbidities,and LS were risk factors for MCI.Spearman correlation analysis revealed a negative correlation between Geriatric Locomotive Function Scale-25 and Mini Mental State Examination scores(r=-0.436,P<0.001).CONCLUSION A significant correlation exists between MCI and LS in geriatric cancer patients.Clinical management and nursing care should concurrently address cognitive impairment and LS to improve patients’overall quality of life and prognosis.
基金supported in part by the by Chongqing Research Program of Basic Research and Frontier Technology under Grant CSTB2025NSCQ-GPX1309.
摘要Small object detection has been a focus of attention since the emergence of deep learning-based object detection.Although classical object detection frameworks have made significant contributions to the development of object detection,there are still many issues to be resolved in detecting small objects due to the inherent complexity and diversity of real-world visual scenes.In particular,the YOLO(You Only Look Once)series of detection models,renowned for their real-time performance,have undergone numerous adaptations aimed at improving the detection of small targets.In this survey,we summarize the state-of-the-art YOLO-based small object detection methods.This review presents a systematic categorization of YOLO-based approaches for small-object detection,organized into four methodological avenues,namely attention-based feature enhancement,detection-head optimization,loss function,and multi-scale feature fusion strategies.We then examine the principal challenges addressed by each category.Finally,we analyze the performance of thesemethods on public benchmarks and,by comparing current approaches,identify limitations and outline directions for future research.
基金financially supported by the Key Research and Development Plan of Heilongjiang Province(2022ZX06C23,JD2023SJ44)to Li Y。
摘要Objective:Cardiovascular diseases pose a major public health challenge in China,particularly in northern frigid regions where environmental stressors and limited access to healthcare access exacerbate disease risk.Both atrial fibrillation(AF)and hypertension are influenced by cold exposure.AF is a frequent cardiovascular complication of hypertension,yet their causal relationship remains incompletely defined.This study aimed to elucidate the mechanisms linking hypertension to AF in frigid regions,with an emphasis on identifying key genes driving disease progression.Methods:We analyzed clinical data from 29,786 patients hospitalized at the First Affiliated Hospital of Harbin Medical University.Multivariate logistic regression was used to assess the association between hypertension and AF,and Mendelian randomization(MR)analyses were performed using genome-wide association study(GWAS)datasets.Wholeblood expression quantitative trait locus(eQTL)analysis and pathway enrichment were applied to identify hypertension-related genes.Singlecell RNA sequencing data from AF patients and hypertensive rat models were used to validate the role of TIE1.In addition,gut microbiota GWAS data were integrated to explore microbial influences on hypertension.Results:Hypertension emerged as both an independent and causal risk factor for AF in frigid regions.Gene expression analyses identified TIE1 as a central mediator of hypertension-related effects,with elevated cardiomyocyte TIE1 expression associated with increased susceptibility to AF.In hypertensive rats,increased TIE1 expression correlated with higher AF incidence and enhanced inflammatory cytokine production,whereas cardiomyocyte-specific TIE1 knockdown reduced AF occurrence and attenuated atrial remodeling.Gut microbiota analysis further revealed that the abundance of Adlercreutzia was inversely correlated with TIE1 expression,suggesting a potential protective role mediated through microbial regulation of host gene expression.Conclusion:These findings establish a causal link between hypertension and AF in cold northern regions and identify TIE1 as a pivotal mediator of this association.Targeting TIE1 may represent a therapeutic strategy for hypertension-associated AF.Moreover,the identification of Adlercreutzia as a modulator of TIE1 underscores the potential of the gut microbiota in preventing cardiovascular complications in frigid regions and opens promising avenues for future interventions.
基金supported by the National Natural Science Foundation of China(Grant No.42192551)the National Key Research and Development Program(Grant No.2022YFC3004200)+1 种基金the Innovation and Development Special Program of the China Meteorological Administration(Grant No.CXFZ2024J006)the Special Fund Project of Basic Scientific Research Business Expenses of the Shanghai Typhoon Institute(Grant No.2024JB03).
摘要Extreme weather events have been identified as the top global risk for the upcoming decade,according to the Global Risk Report 2025.Between July and September 2024,four tropical cyclones with extreme characteristics made landfall in China,highlighting the potential impacts of climate change on tropical cyclone activity.Super Typhoon Gaemi made landfall in Taiwan and Fujian provinces,setting record-breaking daily rainfall at 14 meteorological stations in Jiangxi,Hunan,and Liaoning provinces.As the strongest typhoon to make landfall in China during autumn,Yagi maintained super typhoon intensity when making landfall in Hainan,Guangdong provinces in China,and Quang Ninh Province in Vietnam.Typhoon Bebinca and Tropical Storm Pulasan made consecutive landfalls in Shanghai within four days,with Bebinca being the strongest typhoon to strike Shanghai and Jiangsu Province since 1949.The World Weather Attribution report indicates that,due to climate change,rainfall events like those from Super Typhoon Gaemi have become more frequent,now occurring every 20 years in the northern Philippines,every 5 years in Taiwan Province,and every 100 years in Hunan Province.In Taiwan and Hunan provinces,climate change has increased rainfall by 14%and 9%,respectively.It is suggested that exploring how climate change influences the extreme events of landfalling typhoons is an important area for future research.
基金The National Natural Science Foundation of China(No.51874189)the Shandong Provincial Natural Science Foundation(Nos.ZR2023ME106 and ZR2023ME055)the Open Fund Project of the Engineering Research Center of the Ministry of Education for Mining Underground Engineering(No.JYBGCZX2021102).
摘要To study the relationships between rock mass crack propagation and damage and confining pressure under blast impact loading during straight-hole cut blasting,tests were performed under different confining pressures.Then,the characteristics of rock mass crack development were analyzed,and the pressure resistance values of core samples before and after blasting were compared to study the trends of rock mass damage.Moreover,a three-dimensional numerical simulation model was established by LS-DYNA to analyze the stress wave propagation,cavity shape and crack propagation characteristics under different confining pressures.The propagation of rock blasting cracks is negatively correlated with the confining pressure.The greater the confining pressure,the shorter the crack development time.Additionally,the crack width is reduced from 0.4-1.7 to 0.04-1.4 mm,and the length is shortened from 280 to 120 mm.A comparison of the compressive strength revealed that blasting reduces the compressive strength of the rock mass.The greater the distance from the explosion source,the lower the degree of strength attenuation.An increase in the confining pressure can inhibit strength attenuation.Numerical simulations revealed that under the same confining pressure,the stress first peaks at the bottom of the blast hole.The greater the confining pressure,the longer the stress peak duration,the smaller the cavity volume,and the shorter the crack propagation length and depth.Under a confining pressure of 4 MPa,the longest crack was only 154.5 mm in length and 102 mm in depth.The research results provide a scientific basis for controlling rock damage and optimizing design in the excavation of deep rock roadways by blasting.
基金partially supported by the National Natural Science Foundation of China(No.51901153)Shanxi Scholarship Council of China(No.2019032)+1 种基金the Natural Science Foundation of Shanxi,China(No.202103021224049)the Shanxi Zhejiang University New Materials and Chemical Research Institute Scientific Research Project,China(No.2022SX-TD025)。
摘要A novel precipitate-free Mg-0.1Sn anode with a homogeneous equal-axis grain structure was developed and rolled successfully at 573 K.Electrochemical test results indicate that the Mg-0.1Sn alloy exhibits enhanced anode dissolution kinetics.A Mg-air battery prepared using this anode exhibits a cell voltage of 1.626 V at 0.5 mA/cm2,reasonable anodic efficiency of 58.17%,and good specific energy of 1730.96 mW·h/g at 10 mA/cm2.This performance is attributed to the effective reactive anode surface,the suppressed chunk effect,and weak self-corrosion owing to the homogeneous basal texture.
基金supported by the National Natural Science Foundation of China(62371423,62450002,62425107)China Postdoctoral Science Foundation(2020M682357).
摘要Contrastive graph clustering(CGC)has become a prominent method for self-supervised representation learning by contrasting augmented graph data pairs.However,the performance of CGC methods critically depends on the choice of data augmentation,which usually limits the capacity of network generalization.Besides,most existing methods characterize positive and negative samples based on the nodes themselves,ignoring the influence of neighbors with different hop numbers on the node.In this study,a novel self-cumulative contrastive graph clustering(SC-CGC)method is devised,which is capable of dynamically adjusting the influence of neighbors with different hops.Our intuition is that better neighbors are closer and distant ones are further away in their feature space,thus we can perform neighbor contrasting without data augmentation.To be specific,SC-CGC relies on two neural networks,i.e.,autoencoder network(AE)and graph autoencoder network(GAE),to encode the node information and graph structure,respectively.To make these two networks interact and learn from each other,a dynamic fusion mechanism is devised to transfer the knowledge learned by AE to the corresponding GAE layer by layer.Then,a self-cumulative contrastive loss function is designed to characterize the structural information by dynamically accumulating the influence of the nodes with different hops.Finally,our approach simultaneously refines the representation learning and clustering assignments in a self-supervised manner.Extensive experiments on 8 realistic datasets demonstrate that SC-CGC consistently performs better over SOTA techniques.The code is available at http://gffzz188fe103f8f1460asofbb0pu5xcxk6xbx.ffgz.tsg.suse.edu.cn/Xiaoqiang-Yan/JAS-SCCGC.
基金the National Natural Science:Foundation of China(52375370)the Open Project of Salt Lake Chemical Engineering Research Complex,Qinghai University(2023-DXSSKF-Z02)+2 种基金the Nat-ural Science Foundation of Shanxi(202103021224049)GDAS Projects of International cooperation platform of Sci-ence and Technology(2022GDASZH-2022010203-003)Guangdong province Science and Technology Plan Projects(2023B1212060045).
摘要The dominated contradiction in optimizing the performance of magnesium-air battery anode lies in the difficulty of achieving a good balance between activation and passivation during discharge process.To further reconcile this contradiction,two Mg-0.1Sc-0.1Y-0.1Ag anodes with different residual strain distribution through extrusion with/without annealing are fabricated.The results indicate that annealing can significantly lessen the“pseudo-anode”regions,thereby changing the dissolution mode of the matrix and achieving an effective dissolution during discharge.Additionally,p-type semiconductor characteristic of discharge productfilm could suppress the self-corrosion reaction without reducing the polarization of anode.The magnesium-air battery utilizing annealed Mg-0.1Sc-0.1Y-0.1Ag as anode achieves a synergistic improvement in specific capacity(1388.89 mA h g-1)and energy density(1960.42 mW h g-1).This anode modification method accelerates the advancement of high efficiency and long lifespan magnesium-air batteries,offering renewable and cost-effective energy solutions for electronics and emergency equipment.
基金supported by the National Natural Science Foundation of China(No.52001106)the Natural Science Foundation of Hebei Province,China(No.E2022202158).
摘要The microstructure and mechanical properties of 2524 Al alloy after quenching in liquid nitrogen(LN2)were investigated by TEM and compared with those of cold water quenching.The results show that the LN2 quenching process effectively induces the formation of dislocation loops.These loops become large and unevenly distribute after aging for 15 min.Furthermore,such loops become rapidly immobilized by the precipitation of coarse S phases after 1 h aging.The alloy quenched in LN2 demonstrates superior peak hardness and displays a more rapid response to subsequent aging treatments compared with the cold water-quenched one.Despite the short aging time,LN2-quenched sample achieves tensile strength of 488 MPa.This enhanced strength is attributed to the strengthening effect of numerous finely dispersed Guinier-Preston-Bagaryatsky(GPB)zones,in conjunction with the inhomogeneous formation of S phase on the dislocation loops.
基金supported by the National Natural Science Foundation of China(Grant Nos.U22A20121 and 52101283)the Suzhou Science and Technology Project(Grant No SJC2023005)+3 种基金the Science and Technology Planning Project of Guangzhou(Grant No 202102010008)the High-Level Hospital Construction Project(Grant No KJ012019520)the Beijing Mu-nicipal Health Commission(BMHC-2021-6,BJRITO-RDP-2024)the Beijing Municipal Public Welfare Development and Reform Pilot Project for Medical Research Institutes(Nos.JYY2023-11 and JYY2023-8).
摘要The poor mechanical properties of pure zinc(Zn)restrain its applications in orthopedics,which requires high loading capacity.Alloying with lithium(Li)element can enhance strength,however,the work-hardening rate is impaired with increased Li content.Here,introducing scandium(Sc)into a low Li-containing Zn-0.1Li alloy could effectively refine its microstructure,reducing the average grain size from 10 to 4μm.The refinement in microstructure led to a significant improvement in tensile strength,im-proving from 257 MPa of Zn-0.1Li to 341 MPa of Zn-0.1Li-0.1Sc,meanwhile,the work-hardening rate remained positive during the whole plastic deformation stage.The addition of Sc-impaired elongation is due to numerous microcracks formed at the Zn/ScZn12interfaces,as well as in the large-sized ScZn12particles.Corrosion tests revealed an accelerated corrosion rate due to the galvanic effect between the Zn matrix and ScZn12phase.Even so,the Zn-0.1Li-1.0Sc alloy still exhibited superior biocompatibility with rat/mouse mesenchymal stem cells and close osteogenesis capacity to the original Zn-0.1Li alloy.These findings demonstrated that the addition of Sc in low Li-containing alloys could improve mechanical strength without sacrificing the work-hardening rate and biocompatibility.