期刊文献+
共找到850篇文章
< 1 2 43 >
每页显示 20 50 100
Experimental Verification of Intrinsic Pressure Framework in an Activity Landscape
1
作者 Zihao Sun Longfei Li +6 位作者 Chuyun Wang Jing Wang Huaicheng Chen Gao Wang Fangfu Ye Liyu Liu Mingcheng Yang 《Chinese Physics Letters》 2026年第1期322-326,共5页
The intrinsic pressure framework,which treats self-propelling force as an external force,provides a convenient and consistent description of mechanical equilibrium in active matter.However,direct experimental evidence... The intrinsic pressure framework,which treats self-propelling force as an external force,provides a convenient and consistent description of mechanical equilibrium in active matter.However,direct experimental evidence is still lacking.To validate this framework,here we employ a programmable robotic platform,where a single light-controlled wheeled robot travels in an activity landscape.Our experiments quantitatively demonstrate that the intrinsic pressure difference across the activity interface is balanced by the emerged polarization force.This result unambiguously confirms the theoretical predictions,thus validating the intrinsic pressure framework and laying the experimental foundation for the intrinsic pressure-based mechanical description of dry active matter. 展开更多
关键词 intrinsic pressure framework activity landscape intrinsic pressure difference robotic platform programmable robotic platformwhere self propelling force polarization force mechanical equilibrium
原文传递
Enabling Intrinsic Antiferroelectricity in Two-dimensional NbOCl_(2):Molecular Dynamics Simulations based on Deep Learning Interatomic Potential
2
作者 Jiawei Mao Yinglu Jia +2 位作者 Gaoyang Gou Shi Liu Xiao Cheng Zeng 《Chinese Physics Letters》 2026年第1期156-178,共23页
Compared to the well-studied two-dimensional(2D)ferroelectricity,the appearance of 2D antiferroelectricity is much rarer,where local dipoles from the nonequivalent sublattices within 2D monolayers are oppositely orien... Compared to the well-studied two-dimensional(2D)ferroelectricity,the appearance of 2D antiferroelectricity is much rarer,where local dipoles from the nonequivalent sublattices within 2D monolayers are oppositely oriented.Using NbOCl_(2) monolayer with competing ferroelectric(FE)and antiferroelectric(AFE)phases as a 2D material platform,we demonstrate the emergence of intrinsic antiferroelectricity in NbOCl_(2) monolayer under experimentally accessible shear strain,along with new functionality associated with electric field-induced AFE-to-FE phase transition.Specifically,the complex configuration space accommodating FE and AFE phases,polarization switching kinetics,and finite temperature thermodynamic properties of 2D NbOCl_(2) are all accurately predicted by large-scale molecular dynamics simulations based on deep learning interatomic potential model.Moreover,room temperature stable antiferroelectricity with low polarization switching barrier and one-dimensional collinear polarization arrangement is predicted in shear-deformed NbOCl_(2) monolayer.The transition from AFE to FE phase in 2D NbOCl_(2) can be triggered by a low critical electric field,leading to a double polarization–electric(P–E)loop with small hysteresis.A new type of optoelectronic device composed of AFE-NbOCl_(2) is proposed,enabling electric“writing”and nonlinear optical“reading”logical operation with fast operation speed and low power consumption. 展开更多
关键词 d monolayers local dipoles nonequivalent sublattices intrinsic antiferroelectricity two dimensional nbocl d antiferroelectricity experimentally accessible shear strainalong molecular dynamics simulations
原文传递
Observation on the Effect of Combined Exercise Intervention Based on the Hospital-Community-Family Model on Intrinsic Capacity in Elderly Patients with Diabetes Mellitus Complicated by Chronic Kidney Disease
3
作者 Meijie Zheng Wenxiu Liu +6 位作者 Bohan Qu Qiong Meng Ziye Chen Jiale Chen Yongfeng Wang Xian Li Huifeng Jiao 《Journal of Clinical and Nursing Research》 2026年第1期221-230,共10页
Objective:To explore the application effect of combined exercise intervention based on the hospital-community-family model on intrinsic capacity in elderly patients with diabetes mellitus complicated by chronic kidney... Objective:To explore the application effect of combined exercise intervention based on the hospital-community-family model on intrinsic capacity in elderly patients with diabetes mellitus complicated by chronic kidney disease.Methods:Using convenience sampling,100 elderly patients with diabetes mellitus complicated by chronic kidney disease who received treatment in the endocrinology department of a tertiary A-level hospital from May 2024 to May 2025 were selected as the study subjects.They were randomly divided into an experimental group(50 cases)and a control group(50 cases)using a random number table method.The control group received routine health education and telephone follow-up,while the experimental group,in addition to the control group’s interventions,underwent combined exercise intervention based on the hospital-community-family model.Remote medical guidance was utilized to monitor and study the application effect of exercise intervention on intrinsic capacity in elderly patients with diabetes mellitus complicated by chronic kidney disease.Fasting blood glucose,2-hour postprandial blood glucose,glomerular filtration rate,6-minute walk distance,and scores in five dimensions of intrinsic capacity(exercise,cognition,psychology,vitality,and sensation)were measured before the intervention,at 4 weeks of intervention,and at 12 weeks of intervention for both groups.Results:Before the exercise intervention,there were no statistically significant differences(p>0.05)between the two groups in terms of fasting blood glucose,2-hour postprandial blood glucose,glomerular filtration rate,6-minute walk distance,and scores across five dimensions of intrinsic capacity:mobility,cognition,psychology,vitality,and sensation.After 12 weeks of intervention,the experimental group demonstrated significantly higher scores than the control group in glomerular filtration rate,6-minute walk distance,and the dimensions of mobility,cognition,and vitality within intrinsic capacity,with all differences being statistically significant(p<0.05).Conversely,the experimental group showed significantly lower scores than the control group in fasting blood glucose,2-hour postprandial blood glucose,and the psychological dimension of intrinsic capacity,with these differences also being statistically significant(p<0.05).Conclusion:Continuous nursing care utilizing telemedicine based on a hospital-community-family model combined with exercise intervention can effectively enhance exercise tolerance and intrinsic capacity in elderly patients with diabetes mellitus complicated by chronic kidney disease,thereby improving their quality of life.The effectiveness of the intervention is positively correlated with the duration of the intervention. 展开更多
关键词 Hospital-community-family model TELEMEDICINE Elderly Diabetes mellitus complicated by chronic kidney disease intrinsic capacity
暂未订购
A cross-sectional study on intrinsic capacity and its influencing factors among community-dwelling older adults in China:the role of digital health literacy and health-promoting lifestyles
4
作者 Fu-Qiang Han Zhan-Feng Li +5 位作者 Zi-Han Ling Qing-Wen Zhang Pei-Yao Li Meng-Xin Zhu Ting Liu Qiu-Yun Mao 《Nursing Communications》 2026年第4期1-10,共10页
Background:Intrinsic capacity reflects the overall health status of older adults and decline in intrinsic abilities can lead to adverse health outcomes.However,empirical studies examining the association between digit... Background:Intrinsic capacity reflects the overall health status of older adults and decline in intrinsic abilities can lead to adverse health outcomes.However,empirical studies examining the association between digital health literacy,health-promoting lifestyles and intrinsic capacity are scarce.Methods:A cross-sectional study was conducted.Using convenience sampling method,371 older adults were recruited from communities.Multidimensional intrinsic capacity,digital health literacy,health promoting lifestyle and sociodemographic information were measured.Results:The intrinsic capacity of older adults scored 3.75±1.10.The prevalences of declined cognitive capacity,psychological capacity,sensory capacity,vitality,and locomotor capacity were 13.7%,24.3%,19.1%,14.8%,53.1%,respectively.The multiple regression analysis revealed that age(β=−0.253),only living with children and/or grandchildren(β=0.249),current working status(β=−0.132),number of chronic diseases(β=−0.149),frequency of Internet usage(β=0.193),the domain of ability to acquire and evaluate digital health information(β=0.197)in digital health literacy,and the domain of nutrition(β=0.171)in health-promoting lifestyle were the significant factors influencing intrinsic capacity,explaining 27.1%of the variance.Conclusion:Digital health literacy and health-promoting lifestyle have a significant impact on intrinsic capacity.Enhancing digital health literacy and advocating a health-promoting lifestyle are critical to promoting intrinsic capacity for community-dwelling older adults. 展开更多
关键词 intrinsic capacity older adults digital health literacy health-promoting lifestyle
暂未订购
An observational longitudinal cohort study on the trajectory of intrinsic capacity and its influencing factors among older Chinese adults:a growth mixture model analysis
5
作者 Xue Liu Yurun Cai +4 位作者 Huimin Wen Huan Fan Weiyao Li Yilin Cheng Shuqin Xiao 《Nursing Communications》 2026年第3期1-13,共13页
Background:The trajectory of intrinsic capacity(IC)among the older population is characterized by its diversity and is predictive of adverse health outcomes such as disability,nursing home admission,decline in quality... Background:The trajectory of intrinsic capacity(IC)among the older population is characterized by its diversity and is predictive of adverse health outcomes such as disability,nursing home admission,decline in quality of life,and mortality.Gaining an understanding of the trajectory of IC and the factors that influence it is of paramount importance for fostering healthy aging.This research is focused on exploring the trajectory of IC among older adults in China and examining the factors that influence it.Methods:This observational longitudinal cohort study leveraged data from the China Health and Retirement Longitudinal Study(CHARLS),which was conducted in the years 2011,2013,and 2015.For the purpose of this analysis,a total of 2,233 participants who were aged 60 and over were included.A Growth Mixture Model(GMM)was utilized to define trajectory categories for IC.Influential factors were ascertained based on the health ecology model,and binary logistic regression analysis was utilized to investigate the factors linked with the different trajectory categories.Results:Two distinct trajectory classes of IC were identified:Class 1,the normal-stable group,encompassed 90.4%of the elderly population,while Class 2,the declining group,made up 9.6%.Advanced age and a history of stroke were found to be significantly associated with Class 2.High scores in activities of daily living(ADL),employment status,receiving primary or junior high school education,and residence in the East or Central regions of China were significantly linked with Class 1.Conclusion:The trajectory of IC among older Chinese adults is marked by its heterogeneity.Advanced age and a history of stroke are significant risk factors for a declining IC trajectory,while higher ADL scores,being employed,receiving primary or junior high school education,and residing in the East or Central regions of China are protective factors associated with a stable IC trajectory.Healthcare institutions must closely monitor IC levels and understand these trajectory patterns to implement personalized and targeted interventions promptly to maintain IC at a healthy level and advocate for healthy aging. 展开更多
关键词 intrinsic capacity trajectory development influencing factors
暂未订购
Chemically Engineered Hydroxyl-terminated Polybutadiene Yields Stable and High-strain Intrinsically Conductive Polyurethane Piezoresistive Sensors
6
作者 Li Zhou Guo-Xuan Ma +6 位作者 Wen-Xue Tian Wen-Cong Sun Shu-Miao Li Xiao-Ru Wang Wen-Chao Ji Yin-Yong Sun Chun-Xiang Li 《Chinese Journal of Polymer Science》 2026年第1期100-115,I0011,共17页
The development of intrinsically conductive piezoresistive sensors with high strain tolerance has garnered significant interest.While elastomeric polymers exhibit excellent strain capabilities,their utility in sensing... The development of intrinsically conductive piezoresistive sensors with high strain tolerance has garnered significant interest.While elastomeric polymers exhibit excellent strain capabilities,their utility in sensing applications has been limited by inherent challenges such as high electrical resistivity,poor aging resistance,and interfacial incompatibility.To address these limitations,hydroxyl-terminated polybutadiene(HTPB)-based polyurethane was chemically modified with acetylferrocene-polyaniline conductive moieties to enhance charge transport properties.Remarkably,this covalent functionalization endowed the resulting ferrocene-polyaniline hybrid polyurethane(FPHP)with a conductivity of2.33 n A at 1 V bias while preserving piezoresistive functionality.The FPHP demonstrated exceptional mechanical-electrical performance,achieving 254% elongation at break with strain-dependent gauge factors of 7.28(0%-12.5% strain,R^(2)=0.9504)and 19.66(12.5%-35.0% strain,R^(2)=0.9929).Further characterization revealed a rapid 0.60 s response time and stability over 3500 strain-release cycles at compression strain,underscoring its durability under repetitive loading.The FPHP sensor was capable of monitoring various human movements and recognizing writing signals.These advances establish a materials design paradigm for fabricating flexible sensors that synergistically integrate high deformability,tunable sensitivity,and robust operational stability,positioning FPHP as a promising candidate for next-generation wearable electronics and soft robotics. 展开更多
关键词 Piezoresistive sensor Chemical modification intrinsically conducting polyurethane Hydroxyl-terminated polybutadiene
原文传递
Kripke’s Intrinsic Truths in Boolean Systems
7
作者 Ming Hsiung Zhaolong Yuan 《逻辑学研究》 2025年第6期19-42,共24页
In Kripke’s theory of truth,the largest intrinsic fixed point—like the least fixed point—is of special theoretical interest among all fixed points.However,for intrinsic yet ungrounded sentences(i.e.,those belonging... In Kripke’s theory of truth,the largest intrinsic fixed point—like the least fixed point—is of special theoretical interest among all fixed points.However,for intrinsic yet ungrounded sentences(i.e.,those belonging to the largest intrinsic fixed points but not to the least fixed point),only sporadic examples have been provided so far,and a universal criterion for deciding such sentences remains unknown.This paper aims to establish a general criterion for determining intrinsic truth in Boolean systems of self-referential sentences under Kleene’s strong valuation scheme.To achieve this,we first present a known result about the definability of three-valued functions within Kleene’s strong logic.Then,by reducing the problem of determining the fixed points to a calculation problem in propositional logic,we demonstrate a truth-functional characteristic for the intrinsic truths in Boolean systems.We thus find an effective method for constructing intrinsic truths in a first-order language for Peano arithmetic.We also discuss the applicability of our findings to Kleene’s weak valuation scheme. 展开更多
关键词 determining intrinsic truth Kripkes theory truth fixed points intrinsic ungrounded sentences iethose Kleenes strong valuation scheme intrinsic truths propositional logic largest intrinsic fixed point
在线阅读 下载PDF
规则导向的ARM到RISC-V intrinsics函数迁移
8
作者 蒲文濠 朱家鑫 +1 位作者 陈伟 李慧 《广西大学学报(自然科学版)》 北大核心 2025年第2期336-348,共13页
RISC-V是当前学术界与产业界重点关注的新一代精简指令集架构,为了加速RISC-V软件生态的构建,将ARM架构软件移植到RISC-V架构是一种高效且实用的策略。其中intrinsics函数作为优化代码的常用方式之一被广泛使用。针对现有ARM NEON intri... RISC-V是当前学术界与产业界重点关注的新一代精简指令集架构,为了加速RISC-V软件生态的构建,将ARM架构软件移植到RISC-V架构是一种高效且实用的策略。其中intrinsics函数作为优化代码的常用方式之一被广泛使用。针对现有ARM NEON intrinsics函数迁移工具适配版本低、覆盖函数少、适用软件范围有限等问题,提出一种基于ARM NEON到RISC-V向量扩展的完整数据类型映射与1 618条intrinsics函数映射关系的迁移方法,有效弥补了现有ARM NEON intrinsics函数迁移领域的不足。实验结果表明,所建立的映射关系覆盖各类软件中常用的intrinsics函数,能有效满足广泛的各类软件包迁移需求。基于该映射关系,提出了相应的自动迁移方法,实现了不修改或仅修改少量代码的迁移效果。 展开更多
关键词 RISC-V ARM NEON RVV intrinsics函数 软件迁移 函数迁移
在线阅读 下载PDF
Merging polymers of intrinsic microporosity and porous carbon-based zinc oxide composites in novel mixed matrix membranes for efficient gas separation
9
作者 Muning Chen Jiemei Zhou +7 位作者 Jing Ma Weigang Zheng Guanying Dong Xin Li Zhihong Tian Yatao Zhang Jing Wang Yong Wang 《Green Energy & Environment》 SCIE EI CAS 2025年第1期203-213,共11页
Mixed matrix membranes(MMMs)have demonstrated significant promise in energy-intensive gas separations by amalgamating the unique properties of fillers with the facile processability of polymers.However,achieving a sim... Mixed matrix membranes(MMMs)have demonstrated significant promise in energy-intensive gas separations by amalgamating the unique properties of fillers with the facile processability of polymers.However,achieving a simultaneous enhancement of permeability and selectivity remains a formidable challenge,due to the difficulty of achieving an optimal match between polymers and fillers.In this study,we incorporate a porous carbon-based zinc oxide composite(C@ZnO)into high-permeability polymers of intrinsic microporosity(PIMs)to fabricate MMMs.The dipole–dipole interaction between C@ZnO and PIMs ensures their exceptional compatibility,mitigating the formation of non-selective voids in the resulting MMMs.Concurrently,C@ZnO with abundant interconnected pores can provide additional low-resistance pathways for gas transport in MMMs.As a result,the CO_(2) permeability of the optimized C@ZnO/PIM-1 MMMs is elevated to 13,215 barrer,while the CO_(2)/N_(2) and CO_(2)/CH_(4) selectivity reached 21.5 and 14.4,respectively,substantially surpassing the 2008 Robeson upper bound.Additionally,molecular simulation results further corroborate that the augmented membrane gas selectivity is attributed to the superior CO_(2) affinity of C@ZnO.In summary,we believe that this work not only expands the application of MMMs for gas separation but also heralds a paradigm shift in the application of porous carbon materials. 展开更多
关键词 Mixed matrix membranes Polymers of intrinsic microporosity CO_(2)separation Porous carbon materials
在线阅读 下载PDF
Intrinsic gallium-68 labeling of nanoclays for in vivo tracking
10
作者 Nian Liu Tingting Wang +1 位作者 Jian Li Xinhui Su 《Journal of Pharmaceutical Analysis》 2025年第1期281-283,共3页
Nanoclays have large specific surface area,good adsorption properties,and biocompatibility that have great potential for drug delivery applications[1].Evaluating the in vivo metabolic pathways of nanoclays can help to... Nanoclays have large specific surface area,good adsorption properties,and biocompatibility that have great potential for drug delivery applications[1].Evaluating the in vivo metabolic pathways of nanoclays can help to understand their pharmacodynamic sites and the toxicological effects caused by their in vivo retention time[2]. 展开更多
关键词 BIOCOMPATIBILITY specific surface area adsorption properties pharmacodynamic sites intrinsic gallium labeling NANOCLAYS toxicological effects vivo tracking
暂未订购
The crucial role of intrinsic properties in determining the biological effects of CeO_(2)nanocrystals
11
作者 Min Sun Wanqin Dai +7 位作者 Yuhui Ma Mengyao Liu Xiao He Zhuda Song Yun Wang Jiaqi Shen Fang Yang Zhiyong Zhang 《Green Energy & Environment》 2025年第9期1881-1891,共11页
Nano ceria(nano-CeO_(2))has been widely applied in various fields of industry and daily life,however,knowledge regarding the biological effects of nano-CeO_(2)with different intrinsic physicochemical properties remain... Nano ceria(nano-CeO_(2))has been widely applied in various fields of industry and daily life,however,knowledge regarding the biological effects of nano-CeO_(2)with different intrinsic physicochemical properties remains limited.In this study,we investigated the impact of nano-CeO_(2)with different properties on the growth of a typical environmental species(romaine lettuce,Lactuca sativa L.)by exposing the plant to four types of CeO_(2)(rod-like nano-CeO_(2)(RNC),cubic nano-CeO_(2)(CNC),spherical nano-CeO_(2)(SNC)and commercial irregular CeO_(2)(CIC))during the germination stage.The results indicated that different types of CeO_(2)exhibited varying inhibitory effects on plant growth.RNC and SNC significantly inhibited the elongation of roots and shoots,while CNC and CIC did not have a significant impact.We further examined the distribution and biotransformation of the four CeO_(2)in plant tissues using transmission electron microscopy(TEM)and synchrotron X-ray absorption near edge structure(XANES).Specifically,the positively charged RNC and SNC were more readily adsorbed onto the root surface,and needle-like nanoclusters were deposited in the intercellular space inside the roots.The absolute content of Ce(III)in the roots romaine lettuce was in the order of RNC>SNC>>CNC>>CIC.The size and shape(i.e.,exposed crystal surface)of the materials affected their reactivity and dissolution ratios,and zeta potentials affected their bioavailability,both of which influenced the overall contents of Ce^(3+)ions in plant tissues.Thus,these characteristics together led to different biological effects.These findings highlight the importance of considering the intrinsic properties of nano-CeO_(2)when assessing their environmental and biological effects. 展开更多
关键词 Nano-CeO_(2) Biological effects intrinsic properties BIOTRANSFORMATION BIOAVAILABILITY
在线阅读 下载PDF
Facets-controllable synthesis of metal-organic frameworks via one supersaturation strategy to insight intrinsic facets effect
12
作者 Lifang Liu Yejun Xiao +2 位作者 Xiangyang Guo Shengye Jin Fuxiang Zhang 《Chinese Journal of Catalysis》 2025年第6期153-158,共6页
The facets effect on the catalytic properties of inorganic compounds and metal-organic frameworks(MOFs)has been widely demonstrated,but the intrinsic facets effect free of interference of capping agents has not been d... The facets effect on the catalytic properties of inorganic compounds and metal-organic frameworks(MOFs)has been widely demonstrated,but the intrinsic facets effect free of interference of capping agents has not been discussed.Here we give a proof-of-concept illustration on the intrinsic facets effect by employing the popularly investigated NH2-MIL-125(Ti)MOFs with{001},{111}and{100}facets controllably exposed as model photocatalysts,which were synthesized via a simple supersaturation strategy free of any capping agents.Compared to conventional synthetic routes with capping agents employed,the NH2-MIL-125(Ti)MOFs obtained in this work exhibit remarkably different physical and chemical properties such as surface wettability,charge separation as well as trend of facets effect on photocatalytic water splitting performance.The main reason has been unraveled to originate from unavoidable residue/influence of capping agents during the conventional facets-controlled synthetic routes leading to changed local surface structural environment as well as distinct charge separation property.Our results demonstrate the importance and feasibility of facets-controllable synthesis free of capping agents in getting insight into the intrinsic facets effect of MOFs-related materials. 展开更多
关键词 Metal-organic framework Facets-controllable synthesis SUPERSATURATION intrinsic facets effect Photocatalyst
在线阅读 下载PDF
Learning intrinsic decomposition with semantic information fusion based on transformer
13
作者 Pengjie ZHAO Hao SHA +1 位作者 Yongtian WANG Yue LIU 《虚拟现实与智能硬件(中英文)》 2025年第6期543-559,共17页
Intrinsic decomposition,the process of decomposing an image into reflectance and shading,is widely used in virtual and augmented reality tasks.Reflectance and shading often exhibit large gradients at the object edges,... Intrinsic decomposition,the process of decomposing an image into reflectance and shading,is widely used in virtual and augmented reality tasks.Reflectance and shading often exhibit large gradients at the object edges,and the intrinsic properties on the same object tend to be similar.This spatial coherence is closely related to semantic consistency because objects within the same semantic category often exhibit similar intrinsic properties.Therefore,incorporating semantic segmentation into a deep intrinsic decomposition framework helps the network distinguish between different object instances and understand high-level scene structures.To this end,we design an intrinsic decomposition network jointly trained with a dedicated semantic segmentation module,allowing semantic cues to enhance the decomposition of reflectance and shading.The semantic module provides guidance during training but is removed during inference,improving performance without increasing the inference cost.Additionally,to capture the global contextual dependencies critical for intrinsic decomposition,we adopt a Transformer-based backbone.The proposed backbone enables the model to associate distant regions with similar material properties,thereby maintaining consistency in reflectance and learning smooth illumination patterns across a scene.A convolutional decoder is also designed to output predictions with improved details.Experiments demonstrate that our approach achieves state-of-the-art performance in the quantitative evaluations on the Intrinsic Images in the Wild(IIW)and Shading Annotations in the wild(SAW)datasets. 展开更多
关键词 intrinsic image decomposition Augmented reality Semantic segmentation Detachable decoder Joint learning
在线阅读 下载PDF
Deep Fusion of Intrinsic Vibration Information and Grassmann Manifold-based Similarity for Fault Identification of Reciprocating Compressor
14
作者 Ying Zhang Jinchen Ji Xiaowang Chen 《Journal of Dynamics, Monitoring and Diagnostics》 2025年第1期1-10,共10页
This paper introduces a new method based on deep belief networks(DBNs)to integrate intrinsic vibration information and assess the similarity of subspaces established on the Grassmann manifold for intelligent fault dia... This paper introduces a new method based on deep belief networks(DBNs)to integrate intrinsic vibration information and assess the similarity of subspaces established on the Grassmann manifold for intelligent fault diagnosis of a reciprocating compressor(RC).Initially,raw vibration signals undergo empirical mode decomposition to break them down into multiple intrinsic mode functions(IMFs).This operation can reveal inherent vibration patterns of fault and other components hidden in the original signals.Subsequently,features are refined from all the IMFs and concatenated into a high-dimensional representative vector,offering localized and comprehensive insights into RC operation.Through DBN,the fault-sensitive information is further refined from the features to enhance their performance in fault identification.Finally,similarities among subspaces on the Grassmann manifold are computed to match fault types.The efficacy of the method is validated usingfield data.Comparative analysis with traditional approaches for feature dimension reduction,feature extraction,and Euclidean distance-based fault identification underscores the effectiveness and superiority of the proposed method in RC fault diagnosis. 展开更多
关键词 deep belief network empirical mode decomposition fault diagnosis Grassmann manifold intrinsic vibration reciprocating compressor
在线阅读 下载PDF
Giant charge trapping in 2D layered oxide nanosheets via intrinsic quantum wells
15
作者 Kyungjune Cho Haena Yim +9 位作者 Gahui Park Jiwoo Yang So-Yeon Yoo Jongwoo Nam Minwoo Song Deok-Hwang Kwon Keehoon Kang Takhee Lee Ji-Won Choi Seungjun Chung 《Journal of Materials Science & Technology》 2025年第30期255-263,共9页
The atomically thin nature of two-dimensional(2D)layered materials makes them susceptible to charge trapping by randomly created disorders,adversely affecting carrier dynamics such as charge transport and exciton life... The atomically thin nature of two-dimensional(2D)layered materials makes them susceptible to charge trapping by randomly created disorders,adversely affecting carrier dynamics such as charge transport and exciton lifetime.Typically,these disorders lead to poor device performance or require additional space to mitigate performance degradation.In this study,we investigate 2D layered Dion–Jacobson(DJ)-phase oxide perovskite nanosheets,which exhibit charge trapping within their well-defined quantum well(QW)structures,resulting in unique tailoring of electrical conductivity and photoconductivity.These DJ-phase perovskites,composed of tunable atomic constituents,demonstrate resonant tunneling and anomalous charge trapping due to their ultra-clean QWs.Remarkably,the conductivity of insulating HSr_(2)Nb_(3)O_(10)(HSNO)increased over 1000 times upon applying voltage without additional treatments.We observed persistent photoconductivity in 2D vertical heterostructure devices,attributed to charge trapping in QWs,and demonstrated artificial synaptic behaviours in a single flake with tailored energy consumption.Varying the number of perovskite layers significantly allows the tunability of the energy bandgap.This study also highlights the high tunability of 2D perovskite nanosheets,promising various applications,including magnetic,high-k dielectric,and resistive switching devices.Our findings suggest a new class of ionic layered materials with great potential as novel two-dimensional building blocks for device applications. 展开更多
关键词 Two-dimensional material Charge trapping intrinsic quantum well Persistent photoconductivity Oxide perovskite
原文传递
Teacher autonomy and teacher job satisfaction: A chain-mediated model of self-efficacy and intrinsic motivation
16
作者 Guangqiang Wang HuiBai +1 位作者 Shuo Wang Yangbang Hu 《Journal of Psychology in Africa》 2025年第1期117-125,共9页
This study aimed to explore the mediating roles of self-efficacy and intrinsic motivation on the relationship between teacher autonomy and teacher job satisfaction.Data were from the Teaching and Learning International... This study aimed to explore the mediating roles of self-efficacy and intrinsic motivation on the relationship between teacher autonomy and teacher job satisfaction.Data were from the Teaching and Learning International Survey(TALIS 2018),with a sample of 3131 junior high school teachers(female=2337;male=794)from Shanghai,China.The mediating effect was analyzed using structural equation modeling.The results showed that teacher autonomy was positively associated with teacher job satisfaction,self-efficacy,and intrinsic motivation.Both self-efficacy and intrinsic motivation were associated with teacher job satisfaction.Self-efficacy was associated with teacher intrinsic motivation.Self-efficacy and intrinsic motivation not only served as independent mediators between teacher autonomy and teacher job satisfaction but also played a chain mediating role.Moreover,the separate mediating effect of self-efficacy was the most significant.Findings are consistent with the job demands-resources model by which diminished teacher autonomy ould explain lower teacher job satisfaction. 展开更多
关键词 teacher autonomy SELF-EFFICACY intrinsic motivation teacher job satisfaction
在线阅读 下载PDF
Membranes of Polymer of Intrinsic Microporosity PIM-1 for Gas Separation:Modification Strategies and Meta-Analysis
17
作者 Boya Qiu Yong Gao +1 位作者 Patricia Gorgojo Xiaolei Fan 《Nano-Micro Letters》 2025年第5期326-358,共33页
Polymers of intrinsic microporosity(PIMs)have received considerable attention for making high-performance membranes for carbon dioxide separation over the last two decades,owing to their highly permeable porous struct... Polymers of intrinsic microporosity(PIMs)have received considerable attention for making high-performance membranes for carbon dioxide separation over the last two decades,owing to their highly permeable porous structures.However,challenges regarding its relatively low selectivity,physical aging,and plasticisation impede relevant industrial adoptions for gas separation.To address these issues,several strategies including chain modification,post-modification,blending with other polymers,and the addition of fillers,have been developed and explored.PIM-1 is the most investigated PIMs,and hence here we review the stateof-the-arts of the modification strategies of PIM-1 critically and discuss the progress achieved for addressing the aforementioned challenges via meta-analysis.Additionally,the development of PIM-1-based thin film composite membranes is commented as well,shedding light on their potential in industrial gas separation.We hope that the review can be a timely snapshot of the relevant state-of-the-arts of PIMs guiding future design and optimisation of PIMs-based membranes for enhanced performance towards a higher technology readiness level for practical applications. 展开更多
关键词 Polymers of intrinsic microporosity(PIMs) PIM-1 Gas separation META-ANALYSIS Upper bound
在线阅读 下载PDF
A diagnosis method based on graph neural networks embedded with multirelationships of intrinsic mode functions for multiple mechanical faults
18
作者 Bin Wang Manyi Wang +3 位作者 Yadong Xu Liangkuan Wang Shiyu Chen Xuanshi Chen 《Defence Technology(防务技术)》 2025年第8期364-373,共10页
Fault diagnosis occupies a pivotal position within the domain of machine and equipment management.Existing methods,however,often exhibit limitations in their scope of application,typically focusing on specific types o... Fault diagnosis occupies a pivotal position within the domain of machine and equipment management.Existing methods,however,often exhibit limitations in their scope of application,typically focusing on specific types of signals or faults in individual mechanical components while being constrained by data types and inherent characteristics.To address the limitations of existing methods,we propose a fault diagnosis method based on graph neural networks(GNNs)embedded with multirelationships of intrinsic mode functions(MIMF).The approach introduces a novel graph topological structure constructed from the features of intrinsic mode functions(IMFs)of monitored signals and their multirelationships.Additionally,a graph-level based fault diagnosis network model is designed to enhance feature learning capabilities for graph samples and enable flexible application across diverse signal sources and devices.Experimental validation with datasets including independent vibration signals for gear fault detection,mixed vibration signals for concurrent gear and bearing faults,and pressure signals for hydraulic cylinder leakage characterization demonstrates the model's adaptability and superior diagnostic accuracy across various types of signals and mechanical systems. 展开更多
关键词 Fault diagnosis Graph neural networks Graph topological structure intrinsic mode functions Feature learning
在线阅读 下载PDF
Fire safety challenge of lithium metal batteries and advanced strategies for improving intrinsic safety
19
作者 Yuan Cheng Lihua Jiang +8 位作者 Xiangming Hu Zhiyuan Yang Hengyu Xu Biao Kong Yurui Deng Longfei Han Mengdan Zhang Xiaoxuan Wei Qingsong Wang 《Journal of Energy Chemistry》 2025年第11期311-335,I0009,共26页
The high energy density of lithium metal batteries(LMBs)has attracted widespread attention,which is expected to improve the endurance mileage of electric vehicles comparable to fossil fuel-powered vehicles.At present,... The high energy density of lithium metal batteries(LMBs)has attracted widespread attention,which is expected to improve the endurance mileage of electric vehicles comparable to fossil fuel-powered vehicles.At present,the main research is focused on developing advanced materials and revealing the indepth electrochemical mechanism of LMBs,while there is a significant lagging behind of attention to the safety evaluation.This review aims to emphasize the fire safety challenges faced by LMBs and summarize advanced strategies for improving intrinsic safety.Firstly,the basic chemical composition and working principle of LMBs were introduced compared with lithium-ion batteries.Moreover,we reviewed the thermal runaway problem of LMBs from the aspects of material activity,interfacial stability triggering conditions,thermal runaway behavior and mechanism,the special thermal runaway characteristics,and new safety challenges of Li-S,Li-O_(2),and the solid-state LMBs were discussed in detail.Based on the analysis of the thermal runaway mechanism,we summarized the advanced strategies,including electrolyte design,interphase film construction,separator,and anode design for improving the intrinsic safety of LMBs.Finally,we proposed the fire safety challenge at the battery level and emphasized the necessity of designing safe materials based on the thermal runaway mechanism.Blocking the thermal coupling reaction and conducting multi-strategy collaborative optimization is the key point to restrain thermal runaway. 展开更多
关键词 Lithium metal batteries Fire safety challenge Thermal runaway mechanism intrinsic safety Materials safety design
在线阅读 下载PDF
Crosstalk between mitochondrial dysfunction and benign prostatic hyperplasia:unraveling the intrinsic mechanisms
20
作者 Huan Liu Yan Li +3 位作者 Jizhang Qiu Junchao Zhang Huan Lai Xinhua Zhang 《The Canadian Journal of Urology》 2025年第4期255-269,共15页
Benign prostatic hyperplasia(BPH)represents a prevalent etiology of lower urinary tract symptoms(LUTS)in the male population,clinically defined by a nonmalignant proliferation of prostatic tissue.While BPH exhibits a ... Benign prostatic hyperplasia(BPH)represents a prevalent etiology of lower urinary tract symptoms(LUTS)in the male population,clinically defined by a nonmalignant proliferation of prostatic tissue.While BPH exhibits a high prevalence among older male populations globally,the precise underlying mechanisms contributing to its development remain incompletely elucidated.Mitochondria,essential organelles within eukaryotic cells,are critical for cellular bioenergetics,the regulation of reactive oxygen species(ROS)generation,and the modulation of cell death pathways.The maintenance of mitochondrial homeostasis involves a complex interplay of processes.By synthesizing previous literature,this review discusses mitochondrial homeostasis in prostate glands and the role of mitochondrial dysfunction in the context of BPH.Furthermore,the review delved into each dimension of mitochondrial dysfunction in the specific etiology of BPH,highlighting its impact on cell survival,apoptosis,ferroptosis,oxidative stress and androgen receptor(AR).Overall,this review aims to unveil the crosstalk between mitochondrial dysfunction and BPH and identify intrinsic mechanisms. 展开更多
关键词 mitochondrial dysfunction benign prostatic hyperplasia lower urinary tract symptoms intrinsic mechanism
暂未订购
上一页 1 2 43 下一页 到第
使用帮助 返回顶部