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Development of silicon carbide fiber-reinforced silicon oxycarbide composites for low-observable unmanned aerial vehicle exhaust nozzles via filament winding,and polymer infiltration and pyrolysis 认领 引用 被引量：2
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作者 Byeong-Joo Kim Ji Eun Lee +4 位作者 Chang-Bin Oh Doo Hyun Choi Man Young Lee Dae Young Jo Shin Kim 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第2期49-65,共17页
Unmanned combat aerial vehicles require lightweight,stealth-capable exhaust systems.However,traditional metallic nozzles increase radar detectability and reduce range,while advanced composites offer high performance b... Unmanned combat aerial vehicles require lightweight,stealth-capable exhaust systems.However,traditional metallic nozzles increase radar detectability and reduce range,while advanced composites offer high performance but are expensive.Therefore,to improve the operational range and survivability of unmanned combat aerial vehicles,a lightweight,high-temperature-resistant,oxidation-resistant,and low-observable composite exhaust nozzle is developed to replace conventional metallic straight-type nozzles.The nozzle features a double serpentine shape to reduce radar and infrared signatures and is manufactured as a monolithic structure using the filament winding process,accommodating the complex geometry and large size(length:1.8 m,width:0.8 m).The exhaust nozzle consists of a ceramic matrix composite made of silicon carbide fibers and a silicon oxycarbide matrix,which absorbs and scatters radio frequency signals while withstanding prolonged exposure to high-temperature(700℃)oxidizing environments typical of engine exhaust gases.The polysiloxane resin used to produce the silicon oxycarbide matrix poses significant challenges owing to its low tackiness and high viscosity variations depending on the presence of nanoparticles,making filament winding difficult.These challenges are addressed by optimizing resin viscosity and winding pattern design.As a result,the tensile strength of the composite specimens fabricated with the optimized viscosity increases by 228.03% before pyrolysis and 97.68%after pyrolysis,compared with that of the non-optimized specimens.In addition,the density and tensile strength of the composite processed via three cycles of polymer infiltration and pyrolysis increased by 13.08% and 80.37%,respectively,compared to those of the non-densified composite.High-temperature oxidation and flame tests demonstrate exceptional thermal and oxidative stability.Furthermore,when compared with carbon fiber-reinforced ceramic matrix composites,the developed composite exhibits a permittivity at least two levels lower and a reflection loss below7 dB within the frequency range of 9.3-10.9 GHz,underscoring its superior electromagnetic stealth performance. 展开更多
关键词 Filament winding Polymer infiltration and pyrolysis Ceramic matrix composites Exhaust nozzle Low observability
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Research progress of afterglow carbon dots in organic matrixes 认领 引用 被引量：1
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作者 Qiang Fu Shouhong Sun +1 位作者 Zhanhua Dong Mingbo Yue 《Nano Materials Science》 EI CAS CSCD 2026年第2期314-338,共25页
Carbon dots(CDs)have been widely studied since their discovery because of simple preparation,low toxicity and excellent luminescence properties.With the deepening of research,the luminescence properties of CDs are not... Carbon dots(CDs)have been widely studied since their discovery because of simple preparation,low toxicity and excellent luminescence properties.With the deepening of research,the luminescence properties of CDs are not only limited to fluorescence,but also their afterglow properties have been widely studied.Many excellent results have been reported for afterglow CDs.Researchers have found that various organic matrixes(OMs)can fix the emission properties of CDs and provide a rigid environment,and the interaction between OMs and CDs can inhibit the non-radiative transition of triplet excitons,which can effectively activate the afterglow performance of CDs.In this review,we provide a detailed introduction to the research progress on afterglow CDs in OMs.The preparation of afterglow CDs and their related properties were analyzed and summarized based on organic polymer matrixes and organic small molecule matrixes.Organic polymer matrixes from synthetic polymers and natural polymers have been introduced.Then,the mechanism of solid and liquid afterglow of CDs by OMs is analyzed,and their applications in the fields of anti-counterfeiting,information encryption,phosphorescence detection,fingerprint recognition,lighting and so on are summarized.Finally,the challenges facing afterglow CDs in OMs are summarized,and future research is proposed. 展开更多
关键词 Carbon dots Afterglow Organic matrixes
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Sensitivity analysis of vibration characteristics and dynamic responses of a tracked vehicle 认领 引用 被引量：1
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作者 Xun Wang Xue Rui +3 位作者 Jinghong Wang Xiaoting Rui Guoping Wang Pingxin Wang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第3期323-348,共26页
This study aims to establish an integrated sensitivity analysis framework for optimization and design of the dynamic performance of mechanical systems such as tracked vehicles,by combining the direct differentiation m... This study aims to establish an integrated sensitivity analysis framework for optimization and design of the dynamic performance of mechanical systems such as tracked vehicles,by combining the direct differentiation method(DDM)with the linear multibody system transfer matrix method(linear MSTMM).The rigid-flexible coupled multibody system dynamics model of a tracked vehicle is established using the linear MSTMM and validated through the modal test.Building upon the existing DDM-based eigenvalue sensitivity analysis method within the linear MSTMM,the DDM is embedded into it to enable programmable and efficient computation of dynamic response sensitivities for mechanical systems.The proposed approach is used to quantitatively evaluate the sensitivities of both natural vibration characteristics(e.g.,natural frequencies and mode shapes)and transient dynamic responses of the tracked vehicle with respect to system parameters,successfully identifying critical structural parameters.Compared to conventional finite difference methods,the developed methodology eliminates sensitivity to perturbation step sizes.The contributions of this work lie in establishing a unified theoretical foundation and analysis framework for guiding dynamics optimization and design of mechanical systems,and extending the applicability of the linear MSTMM to sensitivity analysis of transient dynamic responses. 展开更多
关键词 Tracked vehicle Sensitivity analysis Vibration characteristics Dynamic responses Direct differentiation method Linear multibody system transfer matrix method
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Semicommutative Matrix Extensions of Reduced Rings with Compatible Endomorphisms 认领 引用 被引量：1
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作者 Ruijuan DU Gang YANG 《Journal of Mathematical Research with Applications》 CSCD 2026年第2期164-174,共11页
Let R be a reduced ring,and k,n be integers with 1≤k≤n.We construct a special subring Tk,n(R),relative to endomorphisms of R,of the upper triangular matrix ring Tn(R)over R and show that Tk,n(R)is semicommutative an... Let R be a reduced ring,and k,n be integers with 1≤k≤n.We construct a special subring Tk,n(R),relative to endomorphisms of R,of the upper triangular matrix ring Tn(R)over R and show that Tk,n(R)is semicommutative and Armendariz.Our results yield more examples of semicommutative and Armendariz rings.Also,the maximality of Tk,n(R)in some rings are discussed. 展开更多
关键词 reduced ring compatible endomorphism matrix ring semicommutative ring Ar-mendariz ring
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A universal CNN-Based approach for modulation period estimation 认领 引用
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作者 Xuguang Xu updates Hang Zhu +4 位作者 Ming Tan Xiaojun Zou Wei Song Lixun Han Xuguang Xu 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第4期69-92,共24页
This paper presents a universal framework for estimating the modulation period of signals with periodic modulation characteristics,applicable to communications,radar,and other radio systems.A key innovation is the int... This paper presents a universal framework for estimating the modulation period of signals with periodic modulation characteristics,applicable to communications,radar,and other radio systems.A key innovation is the introduction of a computationally efficient modulation period spectrum,derived from the dynamic segmentation covariance matrix,which helps mitigate the effects of non-synchronous reception.To resolve estimation ambiguities caused by multiple spectral peaks,a convolutional neural network(CNN)is employed to classify the structural patterns of covariance matrices associated with these peaks,enabling precise period identification.Furthermore,to enhance overall efficiency,a separate CNN-based coarse estimation stage is designed using Hankel covariance cumulative matrices to narrow down the search range prior to refined estimation.Simulation results demonstrate that the proposed two-step approach—coarse search range estimation followed by precise period determination—achieves high accuracy without prior knowledge of the modulation scheme,offering significant advantages in non-cooperative signal processing scenarios. 展开更多
关键词 Modulation period Periodic modulation characteristics Non-synchronous reception Dynamic segmentation covariance matrix Hankel covariance cumulative matrix Convolutional neural network Non-cooperative signal processing
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A Kind of Fast Iterative Methods With the Application Based on Diagonal Matrix Splitting 认领 引用 被引量：1
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作者 XU Qiuyan 《宁夏大学学报（自然科学版中英文）》 CAS 2026年第1期1-13,共13页
The fast solution of linear equations has always been one of the hot spots in scientific computing.A kind of the diagonal matrix splitting iteration methods are provided,which is different from the classical matrix sp... The fast solution of linear equations has always been one of the hot spots in scientific computing.A kind of the diagonal matrix splitting iteration methods are provided,which is different from the classical matrix splitting methods.Taking the decomposition of the diagonal elements for coefficient matrix as the key point,some new preconditioners are constructed.Taking the tri-diagonal coefficient matrix as an example,the convergence domains and optimal relaxation factor of the new method are analyzed theoretically.The presented new iteration methods are applied to solve linear algebraic equations,even 2D and 3D diffusion problems with the fully implicit discretization.The results of numerical experiments are matched with the theoretical analysis,and show that the iteration numbers are reduced greatly.The superiorities of presented iteration methods exceed some classical iteration methods dramatically. 展开更多
关键词 iteration matrix splitting diffusion equation convergence optimal relaxation factor
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Large-scale integrated photonic accelerators for ultralow-latency and universal AI computing 认领 引用
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作者 Xiangyan Meng Junshen Li +4 位作者 Kangwei Fei Yu Wang Wei Li Nuannuan Shi Ming Li 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期12-15,共4页
Integrated silicon photonics has emerged as a transformative technology for post-Moore’s law computing,offering intrinsic advantages of high bandwidth,ultralow latency and low energy consumption that far exceed tradi... Integrated silicon photonics has emerged as a transformative technology for post-Moore’s law computing,offering intrinsic advantages of high bandwidth,ultralow latency and low energy consumption that far exceed traditional electronic computing architectures[1−4].As artificial intelligence(AI)models continue to grow in complexity and scale,the demand for high-speed,energy-efficient computing has spurred intensive research into photonic computing as a promising alternative to electronic accelerators[5−7].Matrix multiply−accumulate(MAC)operations,the core of deep learning and combinatorial optimization algorithms,are particularly amenable to photonic implementation,as light enables parallel multiplication and accumulation with minimal data movement[8,9].However,the practical application of photonic computing has long been hindered by critical challenges including large-scale integration of photonic components,electro-optical co-packaging,guaranteed computation accuracy of analog photonic systems,and compatibility with mainstream AI models and algorithms[10,11]. 展开更多
关键词 photonic computing integrated silicon photonics electronic computing ultralow latency matrix multiply accumulate analog photonic systems silicon photonics electronic accelerators matrix
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Biomimetic de novo construction of hierarchically aligned and gradient-mineralized collagen for tendon-bone integrated regeneration 认领 引用
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作者 Miao Lei Hao Luo +7 位作者 Luyi Sun Songsong Shi Zhuangri Zhang Chengxuan Yu Han Gao Jun Chen Changsheng Liu Xue Qu 《Bioactive Materials》 SCIE CSCD 2026年第8期157-177,共21页
The tissues spanning from tendon to bone exhibit a highly specialized extracellular matrix(ECM)architecture,characterized by hierarchical collagen alignment and a gradient mineral composition,which together enable eff... The tissues spanning from tendon to bone exhibit a highly specialized extracellular matrix(ECM)architecture,characterized by hierarchical collagen alignment and a gradient mineral composition,which together enable efficient force transfer and guide spatially organized cellular phenotypes.However,recapitulating such complex multi-scale organization and compositional gradients to achieve integrated soft-hard tissue remains challenging.Here,we report the de novo construction of biomimetic collagen-mineral matrices that mimic both the hierar-chical organization and mineral gradient distribution of the native tendon-to-bone ECM.Through synergistic electro-assembly and post-treatment,collagen molecules self-organized into aligned fibrillar matrices with multi-scale architecture,replicating tendon-side morphology while providing robust tensile mechanics.At the opposing end,intrafibrillar and interfibrillar minerals were spatially patterned to emulate the mineral gradient from tendon to bone.This structural and compositional continuum enables smooth mechanical transition across the soft-hard tissue interface and promotes region-specific regeneration of aligned tendon-like tissue,fibrocartilage and bone.In vivo studies in rabbit models confirm that these de novo constructed matrices support histological reconstruction of multiple tissues from tendon to bone at the rotator cuff,and significantly improve functional recovery.This work presents a bottom-up biomimetic strategy for engineering multiscale collagen-based scaf-folds and demonstrates the therapeutic potential of de novo constructed matrices for multiple tissue regeneration. 展开更多
关键词 de novo biomimetic construction Hierarchical collagen matrix Gradient mineralization Electroassembly Tendon to bone regeneration
Injectable Biomimetic Composite Hydrogel Scaffold With Tissue-Engineered Cartilage Matrix for Articular Cartilage Regeneration 认领 引用
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作者 Zhong-Lian Wu Jun-Jie Jiang +11 位作者 Hang Yao Xian-Feng Shang Ming-Di Zheng Xu Hu Shuo Xu Jun-Li Shi Yan Han Chi-Run Wang Qi Tao Huai-Guo Xue Dong-An Wang Yu-Chi Zhao 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期305-321,共17页
Articular cartilage regeneration remains a significant challenge because of its limited intrinsic healing capacity and the inadequacy of conventional treatments for restoring structural and functional integrity.In thi... Articular cartilage regeneration remains a significant challenge because of its limited intrinsic healing capacity and the inadequacy of conventional treatments for restoring structural and functional integrity.In this study,a novel injectable composite hydrogel scaffold was designed to mimic the extracellular matrix(ECM)of native cartilage.The scaffold combines hyaluronic acid methacrylate(HAMA),chondroitin sulfate methacrylate(CSMA),and decellularized cartilage matrix(dCM)enriched with TypeⅡcollagen(COLⅡ).This biomimetic scaffold exhibited excellent injectability,rapid UV-induced cross-linking,and favorable mechanical properties.Biological assessments demonstrated that the scaffold effectively enhanced chondrocyte proliferation,phenotypic maintenance,and ECM synthesis,with a remarkable over 10-fold upregulation of COLⅡgene expression.Additionally,studies have further confirmed the superior capability of the scaffold to facilitate hyaline cartilage regeneration in vivo,with the regenerated tissue closely mimicking the mechanical and histological characteristics of native cartilage.This study provides an innovative biomimetic approach for cartilage regeneration and repair,offering potential as a minimally invasive strategy for cartilage repair in tissue engineering. 展开更多
关键词 articular cartilage biomimetic scaffold composite hydrogel decellularized cartilage matrix injectability
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Optimized iterative shrinkage threshold generalized inverse beamforming for sound source localization 认领 引用
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作者 Huihui He Xinyu Wang +2 位作者 Zeyu Yang Xiaofei Wu Shengguo Shi 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期464-475,共12页
This work addresses underwater noise source localization.Leveraging the spatial sparsity of sound sources,we employ an optimized iterative shrinkage-thresholding generalized inverse beamforming(OISTA-GIB)method to loc... This work addresses underwater noise source localization.Leveraging the spatial sparsity of sound sources,we employ an optimized iterative shrinkage-thresholding generalized inverse beamforming(OISTA-GIB)method to localize noise sources.Firstly,the sparsity of sound sources is exploited by introducing the λ1norm,resulting in an objective function that combines the λ1norm,with generalized inverse beamforming.This function is solved using an iterative shrinkage-thresholding algorithm(ISTA)to obtain sound source positions.Secondly,we note that when ISTA solves this objective function,the penalty strength applied by the identity matrix to all scanning points on the sound source surface is uniform.This uniformity reduces positioning accuracy.To enhance localization accuracy and spatial resolution,we propose an iterative regularization matrix-optimized ISTA to solve the objective function.Here,the result from the previous iteration is used to construct a regularization matrix that increases the penalty strength in non-source regions during the current iteration.This process iteratively narrows the mainlobe width in source regions until termination conditions are met,yielding refined sound source positions.Finally,simulations and experimental data processing show that the proposed OISTA-GIB method achieves higher accuracy and spatial resolution in noise source localization compared to existing methods. 展开更多
关键词 generalized inverse beamforming iterative regularization matrix iterative shrinkage threshold fast iterative shrinkage threshold
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Tranilast ameliorates experimental abdominal aortic aneurysm by inhibiting the NLRP3 inflammasome pathway 认领 引用
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作者 Haole Liu Kangli Tian +18 位作者 Weilai Fu Longlong Qin Ruipu Tian Panpan Wei Jiawei Zou Naqash Alam Fizza Malik Kexin Li Meng Li Boyu Xu Jia Guo Congcong Xia Rong Wang Weirong Wang Liang Bai Enqi Liu Baohui Xu Yankui Li Sihai Zhao 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2026年第3期850-864,共15页
An abnormal inflammatory response is one of the main pathogenic mechanisms of abdominal aortic aneurysms(AAAs),and tranilast,an antiallergic drug,has anti-inflammatory properties.The effect and mechanism of action of ... An abnormal inflammatory response is one of the main pathogenic mechanisms of abdominal aortic aneurysms(AAAs),and tranilast,an antiallergic drug,has anti-inflammatory properties.The effect and mechanism of action of tranilast on AAAs remain incompletely defined.To evaluate the preventive and therapeutic effects on experimental AAAs induced by intra-aortic elastase infusion in mice,tranilast was administered either before or after elastase infusion and continued until the experimental endpoint.Bioinformatics analysis and corresponding validation experiments were used to explore the possible mechanisms by which tranilast affects AAA progression.Compared with vehicle treatment,both tranilast pre-treatment and post-treatment therapies markedly inhibited aneurysmal aortic expansion.Treatment with tranilast attenuated the degradation of aneurysmal medial elastin and the depletion of smooth muscle cells.Aortic leukocyte accumulation was significantly lower in aneurysmal aortas from tranilast-treated mice than in those from vehicle-treated mice.Mural abnormal angiogenesis and aortic matrix metalloproteinase(MMP)2 and 9 expression levels were also reduced after tranilast treatment.Bioinformatics analysis revealed that nucleotide-binding oligomerization domain-like receptor family protein 3(NLRP3)may be a hub target through which tranilast affects AAAs.NLRP3 expression levels were lower in the aneurysmal aortas of tranilast-treated mice than in those of vehicle-treated elastaseinfused mice.Both Nlrp3 deficiency and treatment with the NLRP3 inhibitor MCC950 attenuated experimental AAAs.However,cotreatment with tranilast had no additive or synergistic influence on AAA suppression.Additionally,tranilast treatment reduced caspase 1 cleavage by the NLRP3 inflammasome and consequently interleukin-1βsecretion in peritoneal macrophages in vitro.These findings indicate that the protective effect of tranilast on AAA may be partially mediated by the inhibition of the NLRP3 inflammasome pathway and may represent a potential drug for the treatment of AAA in the clinic. 展开更多
关键词 Abdominal aortic aneurysm NLRP3 Inflammation Tranilast Macrophages Angiogenesis Matrix metalloproteinase Therapy
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Tissue-specific matrix-bound nanovesicles regulate the immunoregulatory progress of biological mesh-aided abdominal hernia repair 认领 引用
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作者 Beili Zhang Jiajie Liu +4 位作者 Lei Liu Jinglei Wu Xiumei Mo Rui Tang Zhengni Liu 《Bioactive Materials》 SCIE CSCD 2026年第8期526-546,共21页
Consensus on abdominal hernia treatment with biological meshes remains elusive,largely due to variable and dynamic responses that dictate extracellular matrix(ECM)remodeling outcomes.Matrix-bound nanovesicles(MBVs)are... Consensus on abdominal hernia treatment with biological meshes remains elusive,largely due to variable and dynamic responses that dictate extracellular matrix(ECM)remodeling outcomes.Matrix-bound nanovesicles(MBVs)are ECM-embedded bioactive cues that govern cell-mesh crosstalk,whereas their tissue-specific functions in immunomodulatory repair remain poorly understood.Herein,MBVs were isolated from clinically used small intestinal submucosa(SIS)and urinary bladder matrix(UBM)-SIS(UBM-SIS)meshes to investigate their differ-ential immunomodulation during hernia repair.SIS MBVs promoted angiogenesis via ERK1/2 activation,while UBM MBVs favored anti-inflammatory macrophage polarization through transforming growth factor-β1(TGF-β1)signaling pathways,showing synergistic effects in combination.In the repair of a full-thickness rat model,UBM-SIS meshes elicited milder early inflammation than SIS meshes.However,the superior immunomodulation of UBM was compromised with the progressive exposure of SIS interlayer.Conversely,SIS meshes initially triggered pronounced inflammation but switched to an anti-inflammatory state after 4 weeks,facilitating tissue integration over 8 weeks through prevailing neovascularization.The ECM-driven response in distinct microenvironments closely aligned with the spatiotemporal release of respective MBVs,with mechanistic analyses corroborating their functional relevance in orchestrating reciprocal pro/anti-inflammatory and remodeling signals.Investi-gating tissue-specific MBVs offers insights into their roles in hernia repair and highlights emerging therapeutic potential in regenerative applications. 展开更多
关键词 Matrix-bound nanovesicles Extracellular matrix Immunomodulation Biological mesh Abdominal wall hernia
Mechanistic insights into mixed gravel–soil mulching effects on soil hydrology in arid ecosystems:A field micro-lysimeter study 认领 引用
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作者 JIA Zhenjiang LIU Xuezhi +7 位作者 JIA Zixuan AN Wenju ZHAO Guangxing LIU Qiaoling WU Yangyang HUANG Yahao MA Bo LI Wangcheng 《Journal of Arid Land》 SCIE CAS CSCD 2026年第4期715-734,共20页
Gravel mulching plays a vital role in modifying the hydrological cycle in arid and semi-arid areas.Yet,the mechanisms underlying long-term mulching effects on soil evaporation remain poorly understood.To investigate t... Gravel mulching plays a vital role in modifying the hydrological cycle in arid and semi-arid areas.Yet,the mechanisms underlying long-term mulching effects on soil evaporation remain poorly understood.To investigate the hydrological effects of mixed gravel–soil mulching(MGSM),we conducted a controlled 39-d soil evaporation experiment(from 22 July to 30 August 2021)using micro-lysimeters at the field experimental site of Ningxia University,China.The soil evaporation rate(E),cumulative soil evaporation(Ec),soil water content(SWC),mulch resistance(rm),and micro-meteorological variables were assessed for six mulch treatments,each containing a different proportion of gravel by volume:100.00%(M1),80.00%(M2),60.00%(M3),40.00%(M4),20.00%(M5),and 0.00%(M6).The treatments(M2–M6)showed a prolonged soil moisture depletion phase and greater Ec(28.71%–83.31%)relative to the gravel-only treatment(M1)(P312 h post-wetting),with the strongest effect occurring in M3,where the mean rm doubled.The SWC,mulch properties,and micro-meteorological parameters(i.e.,air relative humidity and surface net radiation flux)were the most important predictors of rm in the mulch treatments.Together,these results suggested that MGSM unexpectedly exacerbated surface soil moisture loss by reducing rm.To mitigate this effect,an optimized mixed gravel–soil mulch,containing 60.00%gravel by volume,might be used;this mixture balances evaporation control with hydrological sustainability and represents a practical strategy for dryland management,offering a compromise between short-term water retention and sustained soil moisture regulation. 展开更多
关键词 gravel mulching gravel-soil matrix hydrological regulation soil evaporation mulch resistance micro-lysimeter
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Biosynthetic reuterin improved the intestinal health in pigs 认领 引用
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作者 Yangyang Wei Yajun Wei +6 位作者 Chunyan Liu Yiyi He Shihui Ruan Yanna Huang Li Wang Xi Yang Hongbo Yi 《Animal Nutrition》 SCIE CAS CSCD 2026年第2期212-227,共16页
This experiment aimed to study the effects of dietary supplementation with biosynthetic reuterin(RT)from Escherichia coli cells on the growth performance and intestinal health of pigs.A total of 72 pigs(Duroc×Lan... This experiment aimed to study the effects of dietary supplementation with biosynthetic reuterin(RT)from Escherichia coli cells on the growth performance and intestinal health of pigs.A total of 72 pigs(Duroc×Landrace×Yorkshire,21 d old,5.7±0.3 kg weight)were randomly divided into basal diet group(CON),basal diet supplemented with 5×1010 colony-forming unit(CFU)/kg Lactobacillus reuteri group(LR),and basal diet supplemented with 50 mg/kg reuterin group(RT)with 6 pens(4 pigs per pen)per group for a 14-d period.One piglet was randomly selected from each pen on the 15th d for sampling.The results showed that the addition of RT to the diet significantly improved the growth performance of piglets,specifically increasing average daily gain(ADG;P=0.004),and reduced diarrhea rate(P=0.012),improved the intestinal morphology by significantly increasing villus height and the villus height to crypt depth ratio(P<0.05),and enhanced intestinal barrier and immune functions by upregulating the expression of related genes(ZO1,MUC1,pBD2,and PR39;P<0.05).Simultaneously,RT upregulated TLR gene expression and activated the MAPK signaling pathway(P<0.05).Combined analysis of microbiome and non-targeted metabolomics showed that RT improved metabolism by affecting the relative abundance of Phascolarctobacterium succinatutens YIT12067(known for succinate production and impacting energy metabolism)and Holdemanella(implicated in carbohydrate metabolism and immune modulation)in pigs(P<0.05).In addition,RT significantly reduced the deposition of intestinal collagen(P<0.05).In conclusion,this study demonstrated that biosynthetic RT effectively improved the growth and intestinal health of pigs,which may provide some theoretical basis for the RT production as a feed additive. 展开更多
关键词 Reuterin Weaned pig Growth performance Gut microbiota Intestinal barrier function Extracellular matrix
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A Wearable Colorimetric Sensor for Ultraviolet Monitoring via Radical‐Triggered Gold Nanoparticle Clustering 认领 引用
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作者 Yahuang Li Huixi Guo +4 位作者 Minghao Huang Lei Zhang Qinxia Wu Qiushui Chen Lili Xie 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期732-740,共9页
Reliable monitoring of ultraviolet(UV)radiation is critical for protecting human health,yet existing sensors often rely on costly or rigid components that hinder portability.Here we report a wearable,low‐cost colorim... Reliable monitoring of ultraviolet(UV)radiation is critical for protecting human health,yet existing sensors often rely on costly or rigid components that hinder portability.Here we report a wearable,low‐cost colorimetric sensor for quantitative UV dosimetry,enabled by radical‐triggered aggregation of gold nanoparticles(AuNPs).Using 2‐hydroxy‐2‐methyl‐1‐phenyl‐1‐propanone(HMPP)as a photosensitizer,UV irradiation generates radicals that induce AuNP clustering,producing a distinct and dose‐dependent color change.The sensor provides accurate quantification across UVA,UVB,and UVC bands,with multivariate fitting enabling spectral differentiation.Its biological relevance was validated using keratinocyte models,directly correlating colorimetric responses with cell viability and oxidative stress.We further fabricated a skin‐conformal smartphone‐readable device for real‐time outdoor monitoring through integration into a flexible,transparent polydimethylsiloxane(PDMS)matrix.This low‐cost,disposable sensor unites quantitative precision and practical usability,offering a promising platform for personal healthcare,occupational safety,and consumer‐level UV protection. 展开更多
关键词 AuNPs colorimetric sensor PDMS matrix UV radiation wearable sensor
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Revealing the dynamic recrystallization and deformation instability of TiC reinforced AZ61 composites with uniform structure and bimodal grain structure 认领 引用
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作者 Lingling Fan Ying Zeng +7 位作者 Lingbao Ren Yanyan huang Kunyang Fan Zhenyu Zhu Ran Ni Gaofeng Quan Wei Feng Hajo Dieringa 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期387-408,共22页
Although microstructural configuration significantly enhances composites’comprehensive mechanical properties,its influence on hot deformation remains unclear.To investigate the effects of microstructural configuratio... Although microstructural configuration significantly enhances composites’comprehensive mechanical properties,its influence on hot deformation remains unclear.To investigate the effects of microstructural configurations on hot workability,dynamic recrystallization(DRX)mechanisms and instability mechanisms,hot compression tests were conducted on two TiC/AZ61 composites(bimodal/uniform structures)with constitutive modeling,processing maps,and microstructure observations.The results show that uniform composite exhibits better hot workability,lower deformation activation energy(Q)and smaller instability regions than bimodal composite.The uniform composite primarily undergoes continuous DRX(CDRX),while the bimodal composite involves both CDRX and discontinuous DRX(DDRX)mechanisms.At low temperatures(T)and high strain rates(˙ε),the uniform composite achieves sufficient DRX,whereas the bimodal composite experiences only partial DRX accompanied by twinning.At high T and low˙ε,the uniform composite is prone to grain boundary sliding(GBS)due to fine grains,causing to micro-voids formation;the bimodal composite undergoes abnormal grain growth(AGG),leading to instability.The favorable hot-processing regions for the bimodal composite are(260-320℃,0.0009-0.03 s-1)and(325-370℃,0.0001-0.0003 s-1),while those for the uniform composite are(260-310℃,0.01-0.1 s-1)and(250-300℃,0.0001-0.0005 s-1).This work offers in-depth insights into DRX and deformation instability in magnesium matrix composites with different initial structures.It provides a guidance for their selection of hot working processes. 展开更多
关键词 Magnesium matrix composite Bimodal structure Hot deformation Dynamic recrystallization Deformation instability
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Enhanced ultrasonic scalpel in longitudinal-bending coupled vibration based on symmetrical acoustic black hole beam structure 认领 引用
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作者 Cheng Chen Yi Wang +3 位作者 Huiqin Chen Chunlong Xu Jianzhong Guo Shuyu Lin 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第7期590-599,共10页
Modern minimally invasive and robotic intelligent surgeries require the miniaturization of ultrasonic scalpels(USs),resulting in a compromise in performance,which is currently an urgent technological challenge needing... Modern minimally invasive and robotic intelligent surgeries require the miniaturization of ultrasonic scalpels(USs),resulting in a compromise in performance,which is currently an urgent technological challenge needing a breakthrough.Additionally,acoustic black holes(ABHs)have attracted widespread attention for their unique ability to capture and focus waves.Hence,a novel enhanced ultrasonic scalpel(EUS)based on symmetrical ABH beam structure in coupled vibration is proposed,capable of achieving strong,cumulative amplification of the amplitude on a short blade and effectively mitigating the performance loss caused by miniaturization.Through numerical modeling,the longitudinal and bending vibration modes of the EUS are coupled at the same frequency by adjusting the blade size.Theoretical modeling results preliminarily verify the design feasibility of the simulation and explain the physical mechanism by which the ABH effect enhances the EUS.Experimental results demonstrate that the EUS achieves a maximum vibration displacement nearly 400% greater than that of the conventional ultrasonic scalpel(CUS),along with the capability for two-dimensional cutting.This research provides theoretical and experimental references for the development of high-performance ultrasonic medical devices and explores the potential applications of ABHs in ultrasonic technology. 展开更多
关键词 ultrasonic scalpel acoustic black hole coupled vibration equivalent circuit transfer matrix
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Microstructure,Mechanical Properties and Wear Resistance of(Ti2Al20La+Al3Ti)/Al-7Si Composites 认领 引用
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作者 An Jiazhi Liu Quanfeng +3 位作者 Ding Wanwu Wei Guoli Yu Haicun Yang Chengliang 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第7期1641-1650,共10页
(Ti2Al20La+Al3Ti)/Al-7Si composites rich in Ti2Al20La and Al3Ti reinforcement phases were prepared by the melt blending method.The influence of the addition amount of Al-Ti-La alloy on the microstruc... (Ti2Al20La+Al3Ti)/Al-7Si composites rich in Ti2Al20La and Al3Ti reinforcement phases were prepared by the melt blending method.The influence of the addition amount of Al-Ti-La alloy on the microstructure,mechanical properties,and wear resistance of the composites was analyzed.Results reveal that the(Ti2Al20La+Al3Ti)/Al-7Si composite(adding 10wt%Al-Ti-La alloy into the Al-7Si alloy)is composed of fineα-Al grains,short rod-like eutectic Si,and blocky Al3Ti and Ti2Al20La phases.The tensile strength,elongation,and hardness of the composite are 176.9 MPa,11.62%,and 73.2 HV,increased by 13.4%,57.0%,and 26.2%compared with those of the Al-7Si alloy,respectively.It is suggested that the(Ti2Al20La+Al3Ti)/Al-7Si composite exhibits relatively high plasticity.Furthermore,the wear resistance of the composites is increased by 20.1%.The performance enhancement is attributed to two key mechanisms.One is the formation of Al3Ti transition layer at the interface between the Al3Ti reinforcement phase and the aluminum matrix,which establishes a semi-coherent relationship with Al3Ti phase.The other is the adsorption of element Si by element La within the Ti2Al20La reinforcement phase,leading to Si enrichment at the edges of the Ti2Al20La phase and thereby forming a semi-coherent Si layer. 展开更多
关键词 aluminum matrix composites Al-Ti-La alloys mechanical properties wear resistance
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Effect of transition layer of(AlCoCrFeNi2.1)p/6061 Al matrix composites on the mechanical properties and corrosion performance 认领 引用
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作者 LI Meng-jia GAN Yu-hua +6 位作者 SHI Yun-jia TAO Jia-quan ZHANG Guo-peng WANG Jing HUANG Hai WANG Jie-fang CAI Bin 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第3期1110-1128,共19页
(AlCoCrFeNi2.1)p/6061 Al matrix composites were prepared by vacuum hot pressing sintering,and the mechanical properties and corrosion performance were investigated.Microstructural characterization reveals that a ri... (AlCoCrFeNi2.1)p/6061 Al matrix composites were prepared by vacuum hot pressing sintering,and the mechanical properties and corrosion performance were investigated.Microstructural characterization reveals that a ring like transition layer formed between the high-entropy alloy particle(HEAp)and the 6061 Al matrix,there were some monoclinic structural phases distributed along the outside of the transition layer,and these are presumed to be Al9(CoCrFeNi)2.With increasing sintering temperature,the hardness,densification and yield strength of composites improved.Compression morphology indicates that the existence of the transition layer is necessary to effectively prevent the expansion of crack in the 6061 Al,resulting in composites that exhibit good plasticity.Galvanic coupling corrosion formed when the composites were tested in simulated seawater,the boundary between the transition layer and the 6061 Al matrix was preferentially corroded to form a ring-shaped corrosion pit,and the thickness of the transition layer would affect the ring-shaped corrosion pit.It could be controlled within a certain thickness by adjusting the sintering temperature of the composites to improve the corrosion resistance.These findings demonstrate the critical role of the transition layer in balancing mechanical properties and corrosion resistance of HEAp-reinforced aluminum composites. 展开更多
关键词 high-entropy alloy particles aluminum matrix composites compression properties corrosion resistance
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Improving mechanical properties of Cu/CNTs composites by incorporating nanotwins 认领 引用
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作者 Wei-lin YU Si-wei LUO +10 位作者 Juan ZHU Min SONG Tian-yu SUN Jian-hong YI Liang LIU Yang-zhen LIU Zhi-guo ZHANG Yong YANG Zhen-tao YU Wei LI Bai-song GUO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第2期571-585,共15页
To exploit the combined strengthening effects of nanotwins and carbon nanotubes(CNTs)in Cu matrix composites,the nanotwins with a width ranging from 3 to 30 nm were incorporated into the CNTs-reinforced Cu matrix comp... To exploit the combined strengthening effects of nanotwins and carbon nanotubes(CNTs)in Cu matrix composites,the nanotwins with a width ranging from 3 to 30 nm were incorporated into the CNTs-reinforced Cu matrix composites using cryogenic rolling and optimizing the initial particle size of the raw Cu powders.The formation of nanotwins in the Cu matrix composite reinforced by only 0.2 wt.%CNTs is accompanied by the increased dislocation density and refined Cu grain size,resulting in much better strength−ductility synergy than the referenced composite without significant nanotwins formation.The analysis of strengthening and toughening mechanisms demonstrates that the strength increment mainly derives from grain refinement strengthening,dislocation strengthening,and nanotwin strengthening.The strength increment from the contribution of the nanotwins accounts for 19.9%of the overall strength increment for the composite.Meanwhile,the retention of good tensile ductility can be reasonably explained by the increased dislocation accommodation ability due to the formed nanotwins and the decreased induced dislocation proliferation. 展开更多
关键词 Cu matrix composite carbon nanotube nanotwin strength ductility
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