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Mineral resources of Asia continent:Resource endowment,mining industry pattern,and contributions to the world economy 认领 引用 被引量：1
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作者 Xi-feng Chen Gang Wang +2 位作者 Yan-xiong Mei Hai-jie Zhao Yan-yun Ma 《China Geology》 CAS CSCD 2026年第1期1-24,共24页
Mineral resources in Asia continent and its mining industry play a significant role in the economic growth and industrialization of both Asia and the world.Asia continent boasts the most comprehensive kinds of mineral... Mineral resources in Asia continent and its mining industry play a significant role in the economic growth and industrialization of both Asia and the world.Asia continent boasts the most comprehensive kinds of minerals,with reserves of at least 38 of over 80 widely used minerals worldwide accounting for more than30%of the global total reserves.Asia continent experienced three main tectonic evolution and mineralization stages:The Precambrian,the Paleozoic,and the Mesozoic to Cenozoic.The abundant mineral resources in this continent can be divided into seven first-order metallogenic belts(metallogenic domains),18 second-order metallogenic belts(metallogenic provinces),61 third-order metallogenic belts(metallogenic zones),and nine main minerogenetic series.Asia continent exhibits the most significant metallogenic specialization among all continents.Specifically,granite belts of Asia continent manifest pronounced metallogenic specialization of tin,rare metals,and porphyry Cu-Au-Mo deposits.Its maficultramafic rock belts and ophiolite belts display notable metallogenic specialization of lateritic nickel deposits and magmatic type chromite deposits,while its Mesozoic to Cenozoic basalt belts show remarkable metallogenic specialization of lateritic bauxite deposits.Consequently,many giant metallogenic belts were formed,including the Southeast Asian tin belt,the Qinghai-Xizang Plateau rare metal metallogenic belt,the Tethyan porphyry Cu-Au-Mo metallogenic belt,the circum-Pacific porphyry Cu-Au-Mo metallogenic belt,the Southeast Asian lateritic bauxite metallogenic belt,the Deccan Plateau lateritic bauxite metallogenic belt in India,the Southeast Asian lateritic nickel metallogenic belt,and the Tethyan magmatic type chromite metallogenic belt—all of which are significant metallogenic belts in Asia continent.Future mineral exploration in Asia should focus primarily on the Precambrian mineralization of ancient cratons,the Paleozoic mineralization of the Central Asian-Mongolian orogenic belt,and the Mesozoic to Cenozoic mineralization of the Tethyan and circum-Pacific mobile belts.Asia's mining industry not only underpins its own economic growth but also propels global economic development and industrialization,contributing significantly to the world economy.Asia boasts the highest production value of minerals,the largest annual production of minerals,and the greatest trade value of mineral products among all the continents,having emerged as the trade center of global mineral products and the center of the mining industry economy.China is identified as one of the few countries that possess the most comprehensive kinds of minerals,and its mining industry has supported and driven the economic development and industrialization of Asia and even the world.Standing as the largest mineral producer worldwide,China ranked first in the production of 28 mineral commodities in the world in 2022.Besides,China exhibits the highest annual production value of minerals and the largest trade value of mineral products among all countries.Therefore,China's demand for global mineral products influences the global supply and demand patterns of minerals and the world economic situation. 展开更多
关键词 Mineral resource endowment Minerogenetic series Metallogenic specialization Carbonate-type REE deposits Weathering-type REE deposits Hard rock-type lithium deposits Laterite nickel deposits Crystalline graphite deposits Magmatic nickel deposits Significant metallogenic belt Mining industry development pattern Mineral exploration and exploitation World economy Contribution Asia continent
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Hydrogeological flow patterns and hydrochemical driving forces of groundwater in a typical coastal hilly region of the Jinjiang watershed,Southeast China:Recommendations for water pollution control and management 认领 引用 被引量：1
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作者 Zhong-shuang Cheng Chen Su +4 位作者 Wen-zhong Wang Bing-yan Li En-de Zuo Yu-meng Tian Zhao-xian Zheng 《China Geology》 CAS CSCD 2026年第2期316-332,共17页
Coastal groundwater(CGW)systems in rapidly urbanizing regions face critical challenges in achieving Sustainable Development Goal(SDG),where anthropogenic pressures intersect with hydrogeological vulnerability.This stu... Coastal groundwater(CGW)systems in rapidly urbanizing regions face critical challenges in achieving Sustainable Development Goal(SDG),where anthropogenic pressures intersect with hydrogeological vulnerability.This study employs coupled isotopic-hydrogeochemical analysis and geostatistics to unravel hydrochemical driving forces compromising groundwater quality in the Jinjiang Downstream Watershed(DJW),Southeast China.The results indicated that groundwater was predominantly recharged from local atmospheric precipitation and lateral recharge from the adjacent boundaries.Hydrochemical distributions exhibited a distinct pattern,transitioning from HCO3-Ca to HCO3·Cl-Ca,and then to Cl-Mg·Ca/Na·Ca,reflecting processes ranging from freshwater recharge to seawater intrusion(SWI).Elevated nitrates were primarily attributed to domestic sewage leakage and septic tank leaching.Additionally,preferential flow posed a risk to deep groundwater quality,by facilitating the rapid transport of contaminants through rock fractures.Key driving forces of hydrochemistry included silicate dissolution with local runoff paths,SWI,and human activities.The study advocates for a governance paradigm integrating electrochemical sensor networks with machine learning-driven contaminant prediction and phased membrane bioreactor deployment,which synergistically reduce nitrate fluxes while maintaining aquifer freshening processes.This integrated approach establishes a scalable model for SDG-aligned groundwater management in vulnerable coastal zones,demonstrating how process-based insights can bridge scientific discovery and water security implementation. 展开更多
关键词 Groundwater flow pattern Atmospheric precipitation Hydrochemistry Nitrate Driving forces Seawater intrusion Electrochemical sensor networks Machine learning Coastal area Sustainable Development Goal(SDG) Groundwater management Hydrogeological survey engineering
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Deep learning-based end-to-end depth estimation from a single-frame fringe pattern with the FDSUNet++ network 认领 引用
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作者 Xinjun ZHU Jialei ZHANG +2 位作者 Limei SONG Hongyi WANG Ruiqin TIAN 《Optoelectronics Letters》 EI 2026年第6期373-378,共6页
Recently the depth estimation methods based on deep learning(DL)retain challenging to estimate a high-precision depth map in fringe projection structured light three-dimensional(3D)measurement with limited information... Recently the depth estimation methods based on deep learning(DL)retain challenging to estimate a high-precision depth map in fringe projection structured light three-dimensional(3D)measurement with limited information from a single-frame fringe pattern.In this letter,we proposed a FDSUNet++convolutional neural network(CNN),which consists of a UNet++base model,an improved squeeze-andexcitation(ISE)block,a Fourier transform(FT)data preprocessing block,and a discrete wavelet transform(DWT)block.The proposed ISE block can improve the ability of feature extraction and the designed FT data preprocessing block preserves the key features of the fringe pattern by FT.The introduced DWT block reduces the complexity and training cost of the model.By integrating these three blocks into the UNet++,it can better achieve depth estimation.Experimental results from two structured light datasets demonstrate that the proposed FDSUNet++outperforms the state-of-the-art networks,achieving the best performance in both qualitative and quantitative evaluation. 展开更多
关键词 neural network cnn which single frame fringe pattern fdsunet unet depth estimation fringe projection discrete wavelet deep learning
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Species Diversity and Elevational Patterns of Reptiles in the Leigongshan National Nature Reserve, Guizhou Province, China 认领 引用
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作者 Xue GOU Caichun PENG +7 位作者 Tuo SHEN Chaobo FENG Lang MU Jing LIU Haijun SU Xiujun TANG Shize LI Xingui LI 《Asian Herpetological Research》 SCIE CAS CSCD 2026年第1期31-33,共3页
Dear Editor,Understanding patterns of species diversity is a primary research focus in macroecology,with its distribution patterns having been described and theoretically validated on a global scale(Peters et al.,2016... Dear Editor,Understanding patterns of species diversity is a primary research focus in macroecology,with its distribution patterns having been described and theoretically validated on a global scale(Peters et al.,2016;Sonne et al.,2025).Numerous studies have found that species richness of different taxa tends to decrease with increasing elevation and is modulated by latitudinal gradients(Peters et al.,2016;Dolson et al.,2024).This principle provides a crucial scientific basis for regional conservation planning.However,it still exhibits significant variations across different mountain ranges and taxa. 展开更多
关键词 patterns species diversity Leigongshan National Nature Reserve species richness Guizhou Province reptiles species diversity elevational patterns regional conservation plannin
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Pattern of disharmony between the heart and kidney: Theoretical basis, identification and treatment 认领 引用 被引量：2
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作者 Jian Dong Tianfang Wang +1 位作者 Lihong Zhao Xinran Chen 《Journal of Traditional Chinese Medical Sciences》 CAS 2017年第4期317-321,共5页
'Harmony between the heart and kidney' refers to the physiological relationship between these two zang organs in Chinese medicine,while 'disharmony between the heart and kidney' (also called disharmony... 'Harmony between the heart and kidney' refers to the physiological relationship between these two zang organs in Chinese medicine,while 'disharmony between the heart and kidney' (also called disharmony between fire and water) refers to the pathological state.The pattern of disharmony between the heart and kidney is widely observed in patients with insomnia,anxiety disorder and menopausal syndrome,etc..In order to gain a full and systematical understanding of this pattern,from the perspective of ancient Chinese philosophy and zang-fu theory in Chinese medicine,we systematically reviewed and discussed the functions and physiological characteristics of the heart and kidney,the origin and development of theories relating to heart-kidney relationship,the pathogenesis and identification of the pattern,as well as the commonly used classical formulas for its treatment,including Coptis and DonkeyHide Gelatin Decoction (Huánglián (E)jiāo Tāng) and Grand Communication Pill (Jiāotài Wán).Two examples of clinical modifications of these formulas in the treatment of insomnia and menopausal syndrome are provided in this article.It should be noted that in clinical practice,these formulas should be used flexibly,and modified in accordance to the condition of the patient. 展开更多
关键词 Harmony between the heart and kidney Disharmony between the heart and kidney Pattern of disharmony between the heart and kidney Coptis and Donkey-Hide Gelatin Decoction (Huánglián (E)jiāo Tāng) Grand Communication Pill (Jiāotài Wán)
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Quantifying the vertical distribution pattern of land-use conversion in the loess hilly region of northern Shaanxi Province 1995–2015 认领 引用 被引量：9
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作者 曹智 李裕瑞 +1 位作者 刘正佳 杨凌帆 《Journal of Geographical Sciences》 SCIE CSCD 2019年第5期730-748,共19页
The mountainous and hilly region plays an important role in ecological safety and production in China. However, recent studies have poorly characterized the parallel structure of land use in the valleys of the mountai... The mountainous and hilly region plays an important role in ecological safety and production in China. However, recent studies have poorly characterized the parallel structure of land use in the valleys of the mountainous and hilly region using topographic factors(e.g.elevation, slope, aspect). Here, the loess hilly region of northern Shaanxi Province is used as a representative case area to analyze the vertical distribution pattern of land-use conversion using the relative elevation concept and the HAND index. The differences in the vertical structure of land-use conversion between absolute elevation and relative elevation were compared. We found that the classifications of absolute and relative elevation had similar proportions of each relative elevation grade in each absolute elevation grade. Cropland,woodland, and grassland were distributed evenly in each grade of absoluteelative elevation,while water body, built-up land and unused land were more likely to spread in low grades of relative elevation than those of absolute elevation. The land-use conversion(i.e. loss of cropland and gain in woodland and built-up land) showed an apparently stepped distribution with relative elevation classification, suitable for revealing vertical distributions of land-use conversion in the loess hilly region. Cropland transformed to woodland was mainly distributed in high grade of relative elevation, decreasing with a decrease in grades, while built-up land transformed from cropland and grassland was mainly distributed in low grade of relative elevation, decreasing with increases in grades. The grade of relative elevation where cropland transformed to woodland descended with the implementation of the Grain for Green Project. Our results suggest that it is better to analyze the vertical distribution of land-use conversion with relative elevation classification in hilly regions. 展开更多
关键词 land use change vertical distribution pattern topographic factors HAND(Height above the Nearest Drainage) loess hilly region northern Shaanxi Province
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Thoughts on the scientific research of the connotation of traditional Chinese medicine patterns 认领 引用
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作者 Kang Xie Yulin Ouyang +1 位作者 Yong Wang Chun Li 《Journal of Traditional Chinese Medical Sciences》 CAS CSCD 2026年第1期3-11,共9页
Traditional Chinese medicine(TCM)is a holistic medical system that classifies and treats diseases based on the concept of patterns.These patterns describe the pathophysiological process of a disease at a specific stag... Traditional Chinese medicine(TCM)is a holistic medical system that classifies and treats diseases based on the concept of patterns.These patterns describe the pathophysiological process of a disease at a specific stage,reflecting both external signs and internal features.TCM patterns are central to pattern differentiation,treatment,clinical practice,and theoretical development in TCM.However,scientific explanation of TCM patterns remains limited because of subjective diagnostic criteria,the absence of a standardized experimental medical system,and unclear biological mechanisms,which restrict the modernization and globalization of TCM.Addressing challenges such as strong subjectivity in diagnosis,lack of standardized experimental systems,and unclear biological mechanisms is necessary to clarify the scientific meaning of TCM patterns and to provide technical approaches for the modernization and globalization of TCM.A strategy focused on“pathogenic factors,genetic predisposition,and disease progression stages”was adopted.This approach included the following:(Ⅰ)constructing disease-pattern integrated biological models with animal models,organoids,and multi-organ chips;(Ⅱ)applying multi-omics technologies,such as spatial omics,single-cell omics,and dynamic metabolic flux omics;(Ⅲ)using artificial intelligence(AI)and big data for data integration and prediction of pattern evolution;and(Ⅳ)validating formula–pattern associations through the“pattern differentiation through formula efficacy”approach.These strategies directly address the main obstacles in TCM pattern research by providing objective,quantifiable,and reproducible methodologies.Constructing disease-pattern integrated models enabled cross-scale research platforms.Applying multi-omics technologies allowed analysis of complex biological bases.AI and big data approaches addressed challenges related to heterogeneous data.The“formula-based pattern differentiation”approach supported precise interventions and the development of new drugs.This interdisciplinary framework advances TCM pattern research by moving from empirical description to objective quantification.By integrating innovative approaches,the study establishes a foundation for systematic,evidence-based TCM diagnosis and treatment,supporting accuracy and promoting international recognition and modernization of TCM.The study shows that combining multi-omics technologies,AI-driven data analysis,and disease-pattern models enables objective quantification of TCM patterns and clarifies their biological mechanisms. 展开更多
关键词 Traditional Chinese medicine patterns Disease-pattern integrated model Multi-omics technology Artificial intelligence Pattern differentiation through formula efficacy
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A multicenter randomized controlled trial and metabolomics exploration of Traditional Chinese Medicine pattern-based therapy for stable chronic obstructive pulmonary disease 认领 引用
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作者 DING Huanzhang WANG Hui +16 位作者 YANG Qinjun MA Xiao WU Di LI Qiao ZHENG Caixia LU Jiasheng WU Chengming HUANG Pingfu CHEN Zhixiang WANG Shihan FENG Jihong LIU Jian SUN Dengdi ZHU Jie TONG Jiabing GAO Yating LI Zegeng 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2026年第3期652-665,共14页
OBJECTIVE:To evaluate the efficacy of Traditional Chinese Medicine(TCM)pattern-based comprehensive therapy on stable chronic obstructive pulmonary disease(COPD)patients and its influence on metabolic profiles.METHODS:... OBJECTIVE:To evaluate the efficacy of Traditional Chinese Medicine(TCM)pattern-based comprehensive therapy on stable chronic obstructive pulmonary disease(COPD)patients and its influence on metabolic profiles.METHODS:In this multicenter trial,270 participants from nine hospitals were randomly divided into a trial group and a control group at a 1∶2 ratio.The trial group received Tiotropium Bromide Powder for Inhalation(TBPI)plus one of three TCM granules[Shenqi Wenfei formula(参芪温肺方),Shenqi Buzhong formula(参芪补中方),or Shenqi Tiaoshen formula(参芪调肾方)],while the control group got only TBPI.The study had a 24-week treatment and 52-week follow-up.The main outcome was the frequency of acute COPD exacerbations.Secondary outcomes included related rates,scores on COPD assessment test(CAT)and modified medical research council(m MRC)dyspnea scale,6-min walk test(6MWT)distance,and lung function,measured at weeks 0,24,and 52.Serum samples for metabolomics were taken from the trial group before/after treatment and from healthy people.RESULTS:A total of 256 out of 270 patients completed the study.The trial group had fewer acute exacerbations than the control group during 52-week follow-up(P<0.05).At 24 weeks,the trial group improved in CAT,m MRC,and 6MWT compared to the control(P<0.05),with m MRC and 6MWT improvements lasting at week 52.Lung function showed no significant group differences.Metabolomics found 32 different metabolites between healthy and pre-treatment patients,17 reversing posttreatment.Bioinformatics showed pathway changes in pre-treatment patients reversed after treatment.CONCLUSION:TCM pattern-based comprehensive therapy reduces acute exacerbation risk and improves quality of life,respiratory symptoms,and exercise tolerance in stable COPD patients,likely by modulating energy,protein,and amino acid metabolism pathways. 展开更多
关键词 pulmonary disease chronic obstructive metabolomics Traditional Chinese Medicine pattern Shenqi Wenfei formula Shenqi Buzhong formula Shenqi Tiaoshen formula
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Lightweight Hybrid Wafer Defect Pattern Network Based on Feedforward Efficient Attention 认领 引用
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作者 Zhiqiang Hu Yiquan Wu 《CAAI Transactions on Intelligence Technology》 SCIE EI CSCD 2026年第1期149-166,共18页
With the increase of semiconductor integration density,in order to cope with the increase of wafer defect complexity and types,especially the low recognition accuracy of overlapping mixed defects and unknown wafer def... With the increase of semiconductor integration density,in order to cope with the increase of wafer defect complexity and types,especially the low recognition accuracy of overlapping mixed defects and unknown wafer defects,this study proposes a lightweight model for wafer defect detection called LightWMNet.First,using a hierarchical attention Encoder-Decoder architecture,the features of wafer defect pattern(WDP)are channel recalibrated to generate high-resolution fine-grained features and low-resolution coarse-grained features.Secondly,the backbone network incorporates two novel attention modules—feedforward spatial attention(FFSa)and feedforward channel attention(FFCa)—to amplify responses in critical defect regions and suppress noise from stochastic discrete pixels.These mechanisms synergistically enhance feature discriminability without introducing significant parametric overhead.Finally,the Dice loss function and the cross entropy loss function are combined to jointly evaluate the segmentation and classification accuracy of the model.Experimental results on the public mixed wafer defect dataset MixedWM38 show that the pixel accuracy(PA),intersection over union(IoU)and Dice coefficient of the proposed network reach 98.26%,94.83%and 97.22%,respectively.Without significantly increasing the computational complexity and size of the model,compared with the existing state-of-the-art(SOTA)model,the classification accuracy of lightWMNet in single defect,three mixed defects and four mixed defects is improved by 0.5%,0.25%and 0.89%respectively.Furthermore,we used transfer learning for the first time to evaluate the model's generalisation ability for unseen defect categories.The results showed that LightWMNet still has a certain recognition ability even in untrained wafer defects. 展开更多
关键词 artificial intelligence artificial neural network feature detection image classification neural nets pattern classification transforms
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Enamel decussation pattern originates from directional sliding of ameloblasts 认领 引用
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作者 Vladislav Rakultsev Josef Lavicky +3 位作者 Marcos Gonzalez Lopez Klara Cigosova Igor Adameyko Jan Krivanek 《International Journal of Oral Science》 SCIE CAS CSCD 2026年第1期66-77,共12页
Enamel,the inorganic tissue covering the crowns of teeth,is known for its remarkable resilience and hardness.These properties originate from its high proportion of mineralized matrix and complex internal microarchitec... Enamel,the inorganic tissue covering the crowns of teeth,is known for its remarkable resilience and hardness.These properties originate from its high proportion of mineralized matrix and complex internal microarchitecture.On an ultrastructural level,it consists of directionally arranged enamel prisms.Continuously growing rodent incisors are an exemplary case of this phenomenon.Their enamel has a consistent decussation pattern,providing teeth with extremely high resistance and ensuring they remain constantly sharp.While the decussation pattern has been described in detail,mechanisms behind its formation have not been experimentally proven.Here,we show that the highly organized enamel micropattern is generated by directional epithelial sliding of enamel-forming ameloblasts in vivo.Our results detail how enamel micropatterning stems from individual cell cluster segregation and subsequent reciprocal interweaving.Based on this determination,we introduce and experimentally demonstrate a new model of enamel decussation pattern formation. 展开更多
关键词 rodent incisors inorganic tissue directionally arranged enamel prismscontinuously directional sliding microarchitecture mineralized matrix enamel decussation pattern ameloblasts
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High-Resolution Interference Patterns of Dark-Bright Solitons with Positive Mass 认领 引用
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作者 Ling-Zheng Meng Ya-Jie Wu +1 位作者 Yan-Hong Qin Li-Chen Zhao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第7期1-4,共4页
Matter-wave soliton interferometry has been identified as a promising candidate for precise measurements and has been extensively investigated both theoretically and experimentally.We propose an interferometer based o... Matter-wave soliton interferometry has been identified as a promising candidate for precise measurements and has been extensively investigated both theoretically and experimentally.We propose an interferometer based on the recently reported dark-bright solitons with positive effective mass,which exhibits high-resolution interference patterns.The fringes are much broader than the healing length,facilitating direct probing.Moreover,the self-interference effect is observed,so that experimental manipulations can be applied to a single soliton to achieve interferometry.These results present a novel approach to designing soliton interferometers based on dark-bright solitons,which has the potential to pave the way for future precise measurements of magnetic fields,gravity,and other physical quantities. 展开更多
关键词 gravity direct probingmoreoverthe dark bright solitons positive effective mass precise measurements magnetic fields experimental manipulations interference patterns
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Special Issue:The Anti-Aging Mechanisms of Functional Foods and Healthy Dietary Pattern 认领 引用
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《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第6期F0004-F0004,共1页
Preface During the aging process,significant changes occur in nutritional metabolism and requirements,particularly among older adults.Nutritional interventions,including the supplementation of functional foods and the... Preface During the aging process,significant changes occur in nutritional metabolism and requirements,particularly among older adults.Nutritional interventions,including the supplementation of functional foods and the modification of dietary patterns,are crucial for mitigating physiological decline and preventing chronic diseases.With global population aging and increasing demands for health-promoting foods,developing functional foods and implementing healthy dietary patterns tailored to the nutritional needs and metabolic characteristics of the aging population have become important research priorities.In addition,elderly-specific foods remain at a relatively early stage of development,and there is still a shortage of products designed for age-related physiological conditions such as dysphagia.Therefore,innovation in nutritious and health-promoting foods for older adults requires systematic efforts spanning mechanistic research,model construction,product development,functional evaluation,and industrial-scale demonstration. 展开更多
关键词 functional foods healthy dietary pa mitigating physiological decline modification dietary patternsare aging dietary patterns supplementation functional foods nutritional metabolism
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Influence of grazing patterns on the stability of soil aggregates in semi-arid grasslands 认领 引用 被引量：1
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作者 LI Haonian MENG Ruibing +2 位作者 MENG Zhongju GE Rile WU Xiaolong 《Journal of Arid Land》 SCIE CAS CSCD 2026年第2期322-338,共17页
Global grassland degradation necessitates the identification of sustainable grazing management strategies.In semi-arid regions,grazing exclusion(GE),cold-season grazing(CG),and free grazing(FG)represent common practic... Global grassland degradation necessitates the identification of sustainable grazing management strategies.In semi-arid regions,grazing exclusion(GE),cold-season grazing(CG),and free grazing(FG)represent common practices in grassland ecosystems,yet the long-term ecological consequences of these patterns on plant community structure and soil aggregate stability remain inadequately elucidated.In this study,we evaluated the effects of GE,CG,and FG on soil organic carbon,soil water content,soil bulk density,soil aggregates,and vegetation indicators in Xilamuren steppe,a semi-arid grassland in northern China through field sampling and laboratory analyses in 2024.Our findings revealed that,compared to CG and FG,GE significantly enhanced aboveground and belowground biomass,species diversity,and soil physical-chemical properties in the 0–30 cm layer.The dominant plant species in GE and CG sites were Stipa krylovii,Leymus chinensis,and Agropyron cristatum,whereas Stipa krylovii,Artemisia frigida,and Leymus chinensis were predominant in FG site.Different grazing patterns led to distinct soil aggregate distributions,with>2.00 andCG>FG.Furthermore,random forest modeling identified plant species diversity,plant growth traits,and grazing patterns as the primary determinants of soil aggregate stability.Collectively,these results offer valuable insights into the sustainable management and ecological restoration of semi-arid grasslands under different grazing pressures. 展开更多
关键词 soil aggregate stability grazing patterns grazing exclusion species diversity soil physical-chemical properties semi-arid grasslands
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MILOF-TCN:A Hierarchical Edge-Fog Framework for Monitoring Abnormal and Missing Patterns in Electric Vehicle Charging Data 认领 引用
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作者 Hwa-Young Jeong 《Computers, Materials & Continua》 SCIE EI 2026年第9期2004-2024,共21页
The rapid growth of electric vehicle(EV)charging infrastructures has introduced new challenges in monitoring abnormal load behaviors under strict latency and resource constraints.Conventional anomaly detection approac... The rapid growth of electric vehicle(EV)charging infrastructures has introduced new challenges in monitoring abnormal load behaviors under strict latency and resource constraints.Conventional anomaly detection approaches either rely on centralized processing or incur excessive false alarms,limiting their practical applicability in large-scale deployments.This paper proposes a hierarchical edge-fog anomaly detection framework that integrates lightweight edge-level filtering with a fog-level Temporal Convolutional Network(TCN)detector.The edge component suppresses non-informative patterns,while the fog layer performs temporal modeling on selectively forwarded data.This design enables controllable reduction of fog-level processing load.Under corrected end-to-end evaluation on real-world EV charging load data,the hierarchical pipeline should be interpreted as a system operating point rather than a uniformly superior detector.Relative to fog-only TCN-AE inference,the selected routing policy reduces fog workload by 34.9%and shortens average detection delay from 93.6 to 75.6 h,but increases false alarms per day from 0.88 to 7.29 and lowers F1 from 0.547 to 0.455.Sensitivity experiments over routing thresholds reveal a consistent trade-off among fog workload,alert burden,detection delay,and retained anomaly evidence.Additional routing diagnostics show that the primary source of performance degradation is information loss induced by filtering,rather than weakness of the fog detector on the forwarded subset.These findings suggest that hierarchical edge intelligence is a practical but calibration-sensitive direction for scalable anomaly monitoring in EV charging infrastructures. 展开更多
关键词 Edge computing fog computing anomaly detection electric vehicle charging time-series monitoring temporal convolutional networks missing data patterns hierarchical architecture
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Experimental Investigation of Laser Surface Hardening of AISI 4340 Steel Using Different Laser Scanning Patterns 认领 引用 被引量：2
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作者 Baha Tarchoun Abderrazak El Ouafi Ahmed Chebak 《Journal of Minerals and Materials Characterization and Engineering》 2020年第2期9-26,共18页
Laser surface transformation hardening becomes one of the most modern processes used to improve fatigue and wear properties of steel surfaces. In this process, the material properties and the heating parameters are th... Laser surface transformation hardening becomes one of the most modern processes used to improve fatigue and wear properties of steel surfaces. In this process, the material properties and the heating parameters are the factors that present the most significant effects on the hardened surface attributes. The control of these factors using predictive modeling approaches to achieve desired surface properties leads to conclusive results. However, when the dimensions of the surface to be treated are larger than the cross-section of the laser beam, various laser-scanning patterns are involved. This paper presents an experimental investigation of laser surface hardening of AISI 4340 steel using different laser scanning patterns. This investigation is based on a structured experimental design using the Taguchi method and improved statistical analysis tools. Experiments are carried out using a 3 kW Nd: YAG laser source in order to evaluate the effects of the heating parameters and patterns design parameters on the physical and geometrical characteristics of the hardened surface. Laser power, scanning speed and scanning patterns (linear, sinusoidal, triangular and trochoid) are the factors used to evaluate the hardened depth and the hardened width variations and to identify the possible relationship between these factors and the hardened zone attributes. Various statistical tools such as ANOVA, correlations analysis and response surfaces are applied in order to examine the effects of the experimental factors on the hardened surface characteristics. The results reveal that the scanning patterns do not modify the nature of the laser parameters’ effects on the hardened depth and the hardened width. But they can accentuate or reduce these effects depending on the type of the considered pattern. The results show also that the sinusoidal and the triangular patterns are relevant when a maximum hardened width with an acceptable hardened depth is desired. 展开更多
关键词 Laser Surface Hardening Process Experimental Investigation Laser Scanning Patterns AISI 4340 Steel Hardness Profile Hardened Depth Hardened Width Design of Experiment Analysis of Variance
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Seasonal emission patterns of airborne phytoncides in temperate forests from autumn to early spring:a case study of Xishui National Forest Park(Yichun,Northeast China) 认领 引用
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作者 Hongda Cai Yitong Wang +6 位作者 Xianwen Huang Sen Zhang Yankun Liu Jian Zhang Dongmei Zhao Peng Zhao Xiuhua Zhao 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第1期256-271,共16页
Xishui National Forest Park in Heilongjiang Province hosts China's most pristine temperate forests and serves as a key site for ecotourism and forest therapy.However,the emission patterns of phytoncides(key bio ac... Xishui National Forest Park in Heilongjiang Province hosts China's most pristine temperate forests and serves as a key site for ecotourism and forest therapy.However,the emission patterns of phytoncides(key bio active compounds) remain poorly understood,limiting their therapeutic application.This study provides the first comprehensive characterization of spatiotemporal dynamics in airborne phytoncides and their synergistic interactions with environmental factors throughout the autumn-early spring seasonal transition in a temperate forest ecosystem.We analyzed the compositional dynamics of phytoncides and terpenoid content variations using thermal desorption-gas chromatography-mass spectrometry(TD-GC-MS) from September 2024 to March 2025.This period encompassed seasonal transitions from autumn to early spring,including diurnal variations in September and snowfall events in November.The method demonstrated detection limits(LODs) ranging from 1.35 to 5.33 ng m-3 and quantification limits(LOQs) from 4.09 to 16.15 ng m-3.Our results revealed pronounced seasonal fluctuations in phytoncide composition.In September,terpenoids,esters,alcohols,and alkanes displayed a diurnal "decrease-increase" trend,whereas aldehydes and ketones peaked at midday.Notably,esters and alcohols were undetectable in November and January.By January,terpenoids reached their lowest proportion(0.17±0.02%) at noon.Five terpenoids(α-pinene,myrcene,D-limonene,camphene,p-cymene) were detected in September,four(α-pinene,D-limonene,camphene,p-cymene) in November,two(D-limonene,p-cymene) in January,and only p-cymene in March.The total concentration and emission rate of the five terpenoids peaked in September afternoons at 1961.58±106.67 ng m-3 and653.86±35.56 ng m-3 h-1,respectively.Nocturnal emissions(32131.95±2522.21 ng m-3) significantly surpassed daytime levels(14473.04±958.49 ng m-3),with emission rates escalating from 1447.30±95.85 ng m-3 h-1(day) to 5355.33±420.37 ng m-3 h-1(night),marking a3.7-fold increase.Snowfall dramatically elevated terpenoid concentrations(pre-snowfall:158.58±14.12 ng m-3;post-snowfall:1080.57±57.76 ng m-3) and emission rates(pre-snowfall:52.86±4.71 ng m-3 h-1;post-snowfall:360.19±19.25 ng m-3 h-1),reflecting a 6.8-fold surge.This study underscores the profound influence of light intensity,seasonal shifts,and climatic conditions on airborne phytoncide levels,offering a scientific foundation for optimizing forest therapy and ecotourism strategies. 展开更多
关键词 Phytoncides Seasonal variation Diurnal-nocturnal patterns Snowfall impact Emission patterns
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Thermal stability design for flexural wave bandgap of metamaterial plates with perforated and pre-curved patterns 认领 引用
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作者 Qian GENG Xing ZHOU +3 位作者 Mengyang WANG Xiongwei YANG Zhushan SHAO Yueming LI 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第3期443-472,I0001-I0004,共30页
A design idea for single-component metamaterial plates is proposed to achieve the thermal stability of flexural wave bandgap by the perforated and pre-curved patterns.The band structure analysis suggests that perforat... A design idea for single-component metamaterial plates is proposed to achieve the thermal stability of flexural wave bandgap by the perforated and pre-curved patterns.The band structure analysis suggests that perforation can release part of the in-plane thermal expansion to weaken the softening effect of thermal stress.Introducing precurved components to the perforated structure will stop the decrement of the bandgap frequency in thermal environment,and even make the frequency higher with appropriate structural parameters.The bending stiffness of the heated plate is enhanced by the thermal deflection induced stiffening effect of the pre-curved components.The segmented pre-curved component presents a strong ability to resist the thermal influence on the flexural wave bandgap.A simplified model is established for the local structure of the precurved component.The theoretical calculations explain the thermally induced frequency increment of the bandgap and the discrepancy in the thermal response between the two pre-curved models.The transmittance of flexural wave validates the effectiveness of the proposed design. 展开更多
关键词 metamaterial plate flexural vibration bandgap perforation pre-curved pattern thermal stability
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A quantitative evaluation for well pattern adaptability in ultra-low permeability oil reservoirs:A case study of Triassic Chang 6 and Chang 8 reservoirs in Ordos Basin 认领 引用 被引量：1
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作者 ZHAO Jiyong AN Xiaoping +4 位作者 WANG Jing FAN Jianming KANG Xingmei TAN Xiqun LI Wenqing 《Petroleum Exploration and Development》 SCIE 2018年第3期499-506,共8页
Based on the previous studies and development practice in recent 10 years, a quantitative evaluation method for the adaptability of well patterns to ultra-low permeability reservoirs was established using cluster anal... Based on the previous studies and development practice in recent 10 years, a quantitative evaluation method for the adaptability of well patterns to ultra-low permeability reservoirs was established using cluster analysis and gray correlation method, and it includes 10 evaluation parameters in the four aspects of optimal evaluation parameters, determination of weights for evaluation parameters, development stage division, and determination of classification coefficients. This evaluation method was used to evaluate the well pattern adaptability of 13 main ultra-low permeability reservoirs in Triassic Chang 6 and Chang 8 of Ordos Basin. Three basic understandings were obtained: Firstly, the well pattern for ultra-low permeability type-I reservoirs has generally good adaptability, with proper well pattern forms and well pattern parameters. Secondly, square inverted nine-spot well pattern is suitable for reservoirs with no fractures; rhombic inverted nine-spot injection pattern is suitable for reservoirs with some fractures; and rectangular well pattern is suitable for reservoirs with rich fractures. Thirdly, for the ultra-low permeability type-Ⅱ and type-Ⅲ reservoirs, with the principles of well pattern form determination, the row spacing needs to be optimized further to improve the level of development of such reservoirs. 展开更多
关键词 ultra-low permeability oil reservoir well pattern adaptability comprehensive evaluation parameter Ordos Basin Triassic Chang 6 Formation Chang 8 Formation
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Fracture response patterns in deep to ultra-deep tight sandstones:A comparison based on core and borehole images 认领 引用
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作者 Yu Du Hu-Cheng Deng +7 位作者 Xiao-Fei Hu Hao-Tian Zhang Hong-Hui Wang Cui-Li Wang Mao-Xin Liu Chen-Yang Zhao Shang-Rong Guo Zi-Yun Zheng 《Petroleum Science》 SCIE EI CAS CSCD 2026年第2期541-562,共22页
Natural fractures serve as the primary storage spaces and flow pathways in deep to ultra-deep tight sandstone reservoirs,directly influencing hydrocarbon accumulation,preservation,and production.Borehole images offer ... Natural fractures serve as the primary storage spaces and flow pathways in deep to ultra-deep tight sandstone reservoirs,directly influencing hydrocarbon accumulation,preservation,and production.Borehole images offer intuitive,continuous,and high-resolution identification of natural fractures along the entire borehole.However,relying solely on complete sinusoidal curves from borehole images for fracture identification may lead to omissions,as it overlooks cases where these curves are incomplete or truncated.To address the problems and deficiencies in fracture identification,this study systematically classifies borehole image feature patterns based on core-to-log spatial position restoring.A bidirectional comparison is conducted between natu ral fractures in cores and the fracture image features in borehole images.A quantitative relationship between fracture dip angle,thin layer thickness and borehole radius was established,accompanied by a mathematical expression describing the fracture curve morphology was proposed.These findings enabled the development of an imaging response pattern for natural fractures in deep and ultra-deep tight sandstone reservoirs,incorporating key parameters such as dip angle,through-layer connectivity,and spatial position within the borehole.In the Bashijiqike-Baxigai tight-sandstone reservoirs of the Bozi-Dabei area,we estimate that approximately 24%of coreobserved fractures display distinct linear-pattern features on borehole images,whereas approximately 91%of borehole images features can be correlated with fractures observed in core.Fracture identification rates for natural fractures increased by 17%in water-based mud and by 3%in oil-based mud through the application of the natural fracture image response pattern.Moreover,this study analyzes the deviations in the matching between core fractures and image features.Finally,we further discuss the common sources of error in natural fracture identification using borehole images from multiple perspectives,including missing core responses,inconsistencies between core and borehole image features,distortion of fracture chord curve,inaccurate fracture count,misclassification of fractures,and variations in interpretation under different mud systems.The research addresses the blind spots of traditional methods in fracture identification within thin layers,not only enhancing the detection rate of natural fractu res but also further improving the accuracy of fractu re recognitio n.At the same time,it will contribute to the optimization of fracture characterization,reservoir evaluation,and production forecasting,providing a more reliable data foundation for exploration and development under complex geological conditions. 展开更多
关键词 Borehole images Natural fracture Fracture image features Fracture response pattern Fracture identification Tight sandstone reservoir
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Hydrocarbon enrichment patterns and exploration targets in the Paleogene Liushagang Formation,Wushi Sag,Beibuwan Basin,China 认领 引用
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作者 WU Keqiang HU Desheng +2 位作者 YOU Junjun MAN Xiao XU Shouli 《Petroleum Exploration and Development》 SCIE 2026年第2期299-310,共12页
The Paleogene Liushagang Formation in the Wushi Sag of the Beibuwan Basin is characterized by dispersed hydrocarbon distribution,small-scale residual exploration targets and large burial depth.Based on data from drill... The Paleogene Liushagang Formation in the Wushi Sag of the Beibuwan Basin is characterized by dispersed hydrocarbon distribution,small-scale residual exploration targets and large burial depth.Based on data from drilling,laboratory experiments,and geophysic analysis,this study systematically investigates the hydrocarbon accumulation conditions and enrichment patterns in the Liushagang Formation.The key findings are obtained in five aspects.First,the structural evolution of the sag involved three distinct stages:early faulting,mid-stage detachment deformation and late adjustment,governed by an“extension–detachment–strike-slip”composite fault system that controlled basin subsidence,depocenter migration and sedimentary environment evolution.Second,three principal source rock intervals in the Eocene Liushagang Formation,concentrated in the southern East Sub-sag under the control of the No.7 Fault Zone,are characterized by considerable thickness and high quality,with the oil shale in the lower part of the second member of Liushagang Formation(lower Liu-2 Member)being the most prolific,providing a robust resource foundation in the sag.Third,four reservoir–seal assemblages are identified,corresponding to three hydrocarbon migration systems:direct source–reservoir contact,fault–sandbody coupling,and fault–structural ridge–sandbody stepwise composite networks.Fourth,three accumulation models are established:“young source,old reservoir”with lateral stepwise migration,“self-sourced and self-stored”intra-source enrichment,and“lower source–upper reservoir”with vertical migration.Fifth,exploration priorities are further delineated,highlighting deep fault-block traps in the central zone of the East Sub-sag,intrasag lithologic traps,and bedrock buried-hill targets with direct source–reservoir connectivity,all demonstrating significant resource potential. 展开更多
关键词 hydrocarbon enrichment pattern accumulation model exploration direction Paleogene Liushagang Formation Wushi Sag Beibuwan Basin
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