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Development of a piezoresistive accelerometer with both high natural frequency and superior overload capability 认领 引用
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作者 Yong Xia Xinyao Meng +8 位作者 Yang Lv Xiangguang Han Zhixia Qiao Mingzhi Yu Chen Jia Qing Zhang Ping Yang Dejiang Lu Libo Zhao 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第7期186-197,共12页
Accelerometers featuring high natural frequencies and superior overload capabilities are particularly valuable in applications such as military low-threshold-weapon fuzes.However,synergistic improve-ment of these para... Accelerometers featuring high natural frequencies and superior overload capabilities are particularly valuable in applications such as military low-threshold-weapon fuzes.However,synergistic improve-ment of these parameters is bottlenecked by the trade-off between sensitivity and natural frequency,and the trade-off between natural frequency and displacement limit.Here,via designing anti-overload structures integrated with the pure-axial-stressed sensing structure,we achieve simultaneous high natural frequency and superior overload capability.The proposed sensor is fabricated and characterized.Results yield a sensitivity of 0.037±0.002 mV/g at 2 V and a natural frequency of 31.35±0.72 kHz,comparable to the reference sensor,and an overload capability of 19445.80±290.55 g representing a 133.84%improvement.Accelerometers with high natural frequency and superior overload capability enable high-fidelity measurement of broadband signals under harsh environments. 展开更多
关键词 Piezoresistive accelerometer Anti-overload structures Pure-axial-stressed sensing structure Natural frequency Overload capability
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Multi-phase trajectory programming with divert capability for lunar lander powered descent 认领 引用
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作者 ZHANG Xiaowen WANG Dayi +2 位作者 HUANG Xiangyu LI Ji WANG Tianshu 《中国空间科学技术（中英文）》 CSCD 北大核心 2026年第3期143-156,共14页
It is important for a lunar lander to possess a large divert capability during the final landing phase,as this can enhance the tolerance for flight deviations in the early phase or improve the obstacle avoidance perfo... It is important for a lunar lander to possess a large divert capability during the final landing phase,as this can enhance the tolerance for flight deviations in the early phase or improve the obstacle avoidance performance.Therefore,when designing the powered descent trajectory,sufficient final phase divert capability should be reserved at the minimum propellant cost.To this end,a multi-phase trajectory programming(MPTP)method for powered descent with approaching phase divert capability is proposed.First,the entire powered descent trajectory is divided into the main braking phase and the approaching phase.The main braking phase is responsible for dissipating the majority of the initial velocity.The approaching phase is responsible for safely and precisely flying toward the landing site.It is nominally a vertical descent trajectory and possesses equal divert capability in all horizontal directions.Then,a constant-thrust linear tangent guidance(LTG)accounting for the lunar curvature is designed for the main braking phase.For the approaching phase,a variable-thrust lossless convex programming(LCP)guidance considering the constraints of tilt angle and glide-slope angle is developed.Subsequently,to connect the two phases and further optimize the propellant consumption throughout the entire trajectory,a method for determining the phase switching condition is proposed.The originally difficult-to-solve two-parameter optimization problem is decomposed into two more easily solvable subproblems,which are solved iteratively via a bilevel optimization framework.Finally,the divert capability of the proposed method is verified through numerical simulation.The programmed trajectory is basically consistent with the results of the pseudospectral method,with the difference in propellant consumption being only 0.006%.This method is suitable for the rapid iterative design of nominal trajectories for lunar lander powered descent in engineering applications. 展开更多
关键词 lunar landing powered descent trajectory programming multi-phase divert capability
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Laser printed bio-inspired active flexible metallic metamaterials with reconfigurable deformation capability 认领 引用
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作者 Wenxin Chen Dongdong Gu +5 位作者 Xin Liu Yu Sun Jianfeng Sun Fangyan Su Jinwen Zou Yusheng Chen 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期575-590,共16页
Metamaterials are excellent candidates for application in smart morphing aircraft owing to their high designability,excellent mechanical and functional properties.However,existing designs often utilize passive structu... Metamaterials are excellent candidates for application in smart morphing aircraft owing to their high designability,excellent mechanical and functional properties.However,existing designs often utilize passive structures and polymer-based materials,limiting the lightweight and strength of the morphing wings.Hence,we proposed a novel active flexible metal metamaterial inspired by the embedded characteristics and wavy interfaces of epidermal cells in the Portulaca oleracea seedcoat,with network honeycomb configuration.The formability,mechanical properties,deformation mechanisms,and the shape memory effect(SME) of network honeycombs manufactured by laser powder bed fusion(LPBF) were systematically investigated.By regulating the number of cell walls per junction,network honeycombs achieved tunable mechanical properties with the Poisson's ratio ranging from -0.21 to +0.47.The hexagonal network honeycombs(HNHs) demonstrated a fracture strain up to 38% and achieved an excellent shape recovery ratio of 96.10% under thermal activation with 10% pre-programmed strain.The reconfigurable deformation capability of the biomimetic metamaterial was demonstrated in morphing wings within a wide application temperature range,enabling smooth and continuous deformation within a range of -25° to 25°.This study highlights the integration of shape memory alloy to endow metamaterials with active and reconfigurable properties,advancing the engineering applications of smart morphing aircrafts. 展开更多
关键词 smart morphing wings laser powder bed fusion deformation recovery capability biomimetic metamaterials shape memory alloy
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A Coordinated Control Strategy for SLCC Considering SVF Withstand Capability under Fault Conditions 认领 引用
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作者 Xintong Mao Yechi Xu +3 位作者 Yaowen Sun Zhihan Liu Yumeng Wang Chuyang Wang 《Energy Engineering》 EI 2026年第6期98-128,共31页
The self-adaption STATCOM and line commutation converter(SLCC)system based on the static var generator and filter(SVF)utilizes the compensation capability of the SVF to reduce the commutation process’s dependence on ... The self-adaption STATCOM and line commutation converter(SLCC)system based on the static var generator and filter(SVF)utilizes the compensation capability of the SVF to reduce the commutation process’s dependence on the AC grid,thereby enhancing the SLCC’s ability to resist commutation failure.However,existing SLCC control strategies have not fully considered the boundary conditions for the safe and stable operation of the SVF(i.e.,the SVF withstand capability),which limits or even deteriorates the ability of the SVF to provide commutation support for the SLCC under AC grid voltage fault conditions.To address this issue,this paper first analyzes the current and voltage limit boundaries of the SVF in the SLCC system from the perspective of SVF device stress,revealing the mechanism of SVF withstand capability exceedance under fault conditions.Based on this analysis,a voltage feedforward control strategy that accounts for the SVF withstand capability is proposed.This strategy accelerates the dynamic response of the SVF under fault conditions and enhances the SLCC’s ability to resist commutation failure,while strictly avoiding the risks of SVF current and voltage exceedance,thereby ensuring the SVF operates within its withstand capability boundaries and improving support security under fault conditions.Furthermore,based on the SVF withstand capability boundaries,the commutation margin required to maintain safe commutation for the SLCC is calculated,and the SLCC inversion angle is dynamically adjusted accordingly.This achieves coordinated control between the SLCC and the SVF,preventing SVF blocking due to exceeding its withstand capability and ensuring safe commutation of the SLCC.Simulation results verify that the proposed strategy can simultaneously achieve non-blocking operation of the SVF and safe commutation of the SLCC. 展开更多
关键词 SLCC SVF withstand capability coordinated control commutation security
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Mission capability assessment of UAV swarms based on UAF and interval-valued spherical fuzzy ANP 认领 引用
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作者 LI Minghao ZHANG An +2 位作者 BI Wenhao FAN Qiucen YANG Pan 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2026年第1期225-241,共17页
For mission-oriented unmanned aerial vehicle(UAV)swarms,mission capability assessment provides an important reference in the design and development process,and is a precondition for mission success.For this multi-crit... For mission-oriented unmanned aerial vehicle(UAV)swarms,mission capability assessment provides an important reference in the design and development process,and is a precondition for mission success.For this multi-criteria decisionmaking(MCDM)problem,the current literature lacks a way to unambiguously present criteria and the popular fuzzy analytic network process(ANP)approaches neglect the hesitancy of subjective judgments.To fill these research gaps,an MCDM method based on unified architecture framework(UAF)and interval-valued spherical fuzzy ANP(IVSF-ANP)is proposed in this paper.Firstly,selected viewpoints in UAF are extended to construct criteria models with standardized representation.Secondly,interval-valued spherical fuzzy sets are introduced to ANP to weight interdependent criteria,handling fuzziness and hesitancy in pairwise comparisons.A method of adjusting weights of experts based on their decision similarities is also included in this process to reduce ambiguity brought by multiple experts.Next,performance characteristics are non-linearly transformed regarding to expectations to get final results.This proposition is applied to assess the mission capability of UAV swarms to search and strike surface vessels.Comparative analysis shows that the proposed method is valid and reasonable. 展开更多
关键词 unmanned aerial vehicle(UAV)swarm capability assessment multi-criteria decision-making(MCDM) unified architecture framework interval-valued spherical fuzzy set analytical network process(ANP)
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How leadership and digital capability drive operational performance in railway supply chains:the mediating role of agility 认领 引用
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作者 Meisam Karami 《Railway Sciences》 2026年第4期453-472,共20页
Purpose-This study examines how leadership and digital capability influence supply chain agility and operational performance within railway supply chains in North America,with a focus on both direct and indirect pathw... Purpose-This study examines how leadership and digital capability influence supply chain agility and operational performance within railway supply chains in North America,with a focus on both direct and indirect pathways.Design/methodology/approach-A quantitative research design was employed using survey data collected from 214 organizations operating within railway-centered supply chain networks across Canada,the United States and Mexico.The proposed model was tested using partial least squares structural equation modeling(PLS-SEM).Findings-The results indicate that leadership plays a dual role in railway supply chain networks by directly enhancing supply chain agility and indirectly influencing agility through digital capability.Digital capability significantly improves both operational agility and performance within railway supply chain networks,while supply chain agility partially mediates the relationship between digital capability and performance.Practical implications-The findings suggest that railway organizations should align leadership,digital investments and agile operational processes to improve responsiveness,coordination and operational performance in infrastructure-intensive environments.Originality/value-This study extends existing literature by integrating leadership into capability-based models and demonstrating its direct and indirect influence on agility and performance in railway supply chains.This study highlights how performance in railway systems depends on the alignment of leadership,digital capability and agility within structurally constrained operational environments. 展开更多
关键词 Leadership Digital capability Supply chain agility Operational performance Railway supply chains Dynamic capabilities
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Verification of Mitigation Capability for Total Loss of Feedwater Accident and Sensitivity Study on Feed-and-Bleed Cooling in a CPR1000 Nuclear Power Plant 认领 引用
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作者 Bo Zhang Zhenhua Zhang 《Energy Engineering》 EI 2026年第9期530-547,共18页
Total loss of feedwater accident is a typical transient among the design extension conditions for pressurized water reactor nuclear power plants,directly related to the loss of core cooling capability.Chinese nuclear ... Total loss of feedwater accident is a typical transient among the design extension conditions for pressurized water reactor nuclear power plants,directly related to the loss of core cooling capability.Chinese nuclear safety regulations require in-depth analysis of such conditions,while most of the Generation II and modified Generation II units currently in operation were designed prior to the issuance of these regulatory requirements,and their mitigation capability remains to be verified.To evaluate the mitigation capability of CPR1000 nuclear power units in operation in China for this accident,an accident sequence involving main feedwater pump trip combined with complete failure of the auxiliary feedwater system under full power condition was simulated based on a high-fidelity simulation platform.By strictly following the emergency operating procedures for operator interventions,the transient responses of key safety parameters including primary coolant system pressure,coolant inventory,core outlet temperature,fuel temperature,and containment pressure were analyzed.The results show that,under the synergistic effect of automatic system actions and procedure guidance,the operator manually opened all three sets of pressurizer safety valves at about 60 min,establishing the feed-and-bleed cooling mode.The minimum reactor pressure vessel water level was 67.7%,the core remained uncovered,and both the peak fuel cladding temperature and core outlet temperature remained below the limits.At about 98 min,the residual heat removal system entry conditions were satisfied,and the core was successfully brought to a safe state.A sensitivity study on the influence of the number of opened safety valve sets was performed.The results indicate that when only two sets of safety valves were successfully opened,all acceptance criteria were still satisfied;when only one set was opened,the heat removal capacity of the safety valves was insufficient,with the pressure exhibiting saw-tooth fluctuations in the range of 2.3-3.7 MPa(a),and the residual heat removal system entry conditions could not be satisfied,thus making a smooth transition to a safe state difficult.These results provide an engineering reference for similar units in coping with total loss of feedwater accidents and for optimizing the feed-and-bleed cooling operational strategy. 展开更多
关键词 Nuclear power plant total loss of feedwater mitigation capability verification feed-and-bleed cooling sensitivity study
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Outcome-Based Education-Oriented Teaching Reform and Practice of the Educational Psychology Course:A Capability-Building Curriculum Reconstruction and Action Research 认领 引用
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作者 You Chen 《Journal of Contemporary Educational Research》 2026年第1期27-38,共12页
This study adopts outcome-based education(OBE)as its guiding philosophy and reports an action research-based curriculum reconstruction of the Educational Psychology course at Guangdong University of Science and Techno... This study adopts outcome-based education(OBE)as its guiding philosophy and reports an action research-based curriculum reconstruction of the Educational Psychology course at Guangdong University of Science and Technology.Grounded in Spady’s OBE principles and Biggs’s constructive alignment theory,the reform redesigns learning outcomes,reorganizes course modules around authentic teaching problems,embeds task-based learning as the core instructional mechanism,and establishes a multi-source evidence system to trace capability development.Data were collected from performance tasks,classroom observations,learning artifacts,and reflective memos across five instructional modules.The findings indicate three major outcomes:(1)Educational Psychology can be repositioned from a theory-oriented course to a psychological sense-making engine for interpreting instructional realities;(2)task design serves as the critical mechanism for activating and forming professional capabilities;and(3)multi-source evidence enables the visibility and traceability of teacher cognition development.The study demonstrates that OBE-based course reconstruction can reshape pre-service teachers’cognitive structures and professional identity at an epistemic level,offering a replicable model for capability-oriented curriculum reform in teacher education. 展开更多
关键词 Outcome-based education Educational psychology Teacher education Capability development Curriculum reform
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Research on Unmanned and Intelligent Combat Theory and Capability Development 认领 引用
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作者 Yilin Zhao Jianwei Zhao +2 位作者 Xuan Liu Fang He Fenggan Zhang 《Journal of Electronic Research and Application》 2026年第1期264-271,共8页
This paper presents a comprehensive analysis of the evolution,foundational concepts,capability development,and operational challenges of unmanned systems.It traces their theoretical progression from post-Cold War orig... This paper presents a comprehensive analysis of the evolution,foundational concepts,capability development,and operational challenges of unmanned systems.It traces their theoretical progression from post-Cold War origins to systematic maturation in the 21st century,emphasizing the central role of emerging operational concepts and exploratory advances in capability development.Key bottlenecks in unmanned combat operations are examined,particularly limitations in communication bandwidth and the vulnerability of data links in contested environments.The paper further discusses future development trajectories,highlighting both technological and ethical challenges.Overall,unmanned warfare is evolving toward a more intelligent,networked,and resilient operational architecture,with profound implications for the conduct and character of future high-end warfare. 展开更多
关键词 Unmanned combat theory Capability development Multi-domain collaboration Artificial intelligence
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Stereoisomeric engineering mediated zinc metal electrodeposition:Critical balance of solvation and adsorption capability 认领 引用 被引量：4
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作者 Wen Liu Qiwen Zhao +7 位作者 Ruheng Jiang Xuyan Ni Tiancheng You Canglong Li Yanzi Deng Bingang Xu Yuejiao Chen Libao Chen 《Advanced Powder Materials》 EI CAS CSCD 2025年第2期76-85,共10页
The exceptional electrochemical performance of zinc anodes is frequently impeded by inadequate deposition kinetics and interfacial chemistry.Herein,we introduce the stereoisomerism to inform the balanced selection of ... The exceptional electrochemical performance of zinc anodes is frequently impeded by inadequate deposition kinetics and interfacial chemistry.Herein,we introduce the stereoisomerism to inform the balanced selection of electrolyte additives,taking into account their solvation and adsorption properties,to achieve the optimal deposition behaviors and electrochemical performance.The three-point coplanar adsorption configuration,in comparison to two-point adsorption,effectively mitigates the interference of water molecules and establishes a coplanar templating effect.This approach fosters a uniform distribution of charges,encourages the preferential orientation growth of(002)planes for uniform zinc deposition.Moreover,an appropriate level of solvation ability can modulate the solvation structure without substantially increasing the de-solvation energy barrier,thereby facilitating faster deposition kinetics than what is observed in cases of strong solvation.As a result,Zn//Zn cell can achieve an excellent performance of more than 3470 h at 2 mA cm-2and 1 mAh cm-2,and Zn//AC full cell can work for 50000 cycles at 3 A g-1.Additionally,under practical conditions(N/P=4.37),the assembled Zn//I2 full cell demonstrates stable lifespan for 710 cycles at 1 A g-1.This work showcases the interplay between adsorption configuration of stereoisomeric additives on the cycling. 展开更多
关键词 Stereoisomeric additives Structure-activity relationship Coplanar templating effect Solvation and adsorption capability Optimized zinc deposition behavior
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Alternative Lens to Understand the Relationships Between Neighborhood Environment and Well-being with Capability Approach and Explainable Artificial Intelligence 认领 引用 被引量：2
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作者 JIAO Linshen ZHANG Min +4 位作者 ZHEN Feng QIN Xiao CHEN Peipei ZHANG Shanqi HU Yuchen 《Chinese Geographical Science》 SCIE CSCD 2025年第3期472-491,共20页
The relationship between the neighborhood environment and well-being is attracting increasingly attention from researchers and policymakers,as the goal of development has shift from economy to well-being.However,exist... The relationship between the neighborhood environment and well-being is attracting increasingly attention from researchers and policymakers,as the goal of development has shift from economy to well-being.However,existing literature predominantly adopts the utilitarian approach,understanding well-being as people’s feelings about their lives and viewing the neighborhood environment as resources that benefit well-being.The Capability Approach,a novel approach that conceptualize well-being as the freedoms to do or to be and regard environment as conversion factors that influence well-being,can offer new lens by incorporating human development in-to these topics.This paper proposes an alternative theoretical framework:well-being is conceptualized and measured by capability;neighborhood environment affects well-being by providing spatial services,functioning as environmental conversion factors,and serving as social conversion factors.We conducted a case study of Changshu City located in eastern China,utilizing multiple resource data,applying explainable artificial intelligence(XAI),namely eXtreme Gradient Boosting(XGBoost)and SHapley Additive exPlana-tions(SHAP).Our findings highlight the significance of viewing the neighborhood environment as a set of conversion factors,as it provides more explanatory power than providing spatial services.Compared to conventional research based on linear relationship as-sumption,our results demonstrate that the effects of neighborhood environment on well-being are non-linear,characterized by threshold effects and interaction effects.These insights are crucial for informing urban planning and public policy.This research enriches our un-derstanding of well-being,neighborhood environment,and their relationship as well as provides empirical evidence for the core concept of conversion factors in the capability approach. 展开更多
关键词 well-being neighborhood environment capability approach non-linear relationship explainable artificial intelligence(XAI)
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An asymmetrically variable wingtip anhedral angles morphing aircraft based on incremental sliding mode control:Improving lateral maneuver capability 认领 引用 被引量：3
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作者 Xiaodong LIU Yong XU Jianqiao LUO 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第1期455-470,共16页
This paper presents the design of an asymmetrically variable wingtip anhedral angles morphing aircraft,inspired by biomimetic mechanisms,to enhance lateral maneuver capability.Firstly,we establish a lateral dynamic mo... This paper presents the design of an asymmetrically variable wingtip anhedral angles morphing aircraft,inspired by biomimetic mechanisms,to enhance lateral maneuver capability.Firstly,we establish a lateral dynamic model considering additional forces and moments resulting during the morphing process,and convert it into a Multiple Input Multiple Output(MIMO)virtual control system by importing virtual inputs.Secondly,a classical dynamics inversion controller is designed for the outer-loop system.A new Global Fast Terminal Incremental Sliding Mode Controller(NDO-GFTISMC)is proposed for the inner-loop system,in which an adaptive law is implemented to weaken control surface chattering,and a Nonlinear Disturbance Observer(NDO)is integrated to compensate for unknown disturbances.The whole control system is proven semiglobally uniformly ultimately bounded based on the multi-Lyapunov function method.Furthermore,we consider tracking errors and self-characteristics of actuators,a quadratic programmingbased dynamic control allocation law is designed,which allocates virtual control inputs to the asymmetrically deformed wingtip and rudder.Actuator dynamic models are incorporated to ensure physical realizability of designed allocation law.Finally,comparative experimental results validate the effectiveness of the designed control system and control allocation law.The NDO-GFTISMC features faster convergence,stronger robustness,and 81.25%and 75.0%reduction in maximum state tracking error under uncertainty compared to the Incremental Nonlinear Dynamic Inversion Controller based on NDO(NDO-INDI)and Incremental Sliding Mode Controller based on NDO(NDO-ISMC),respectively.The design of the morphing aircraft significantly enhances lateral maneuver capability,maintaining a substantial control margin during lateral maneuvering,reducing the burden of the rudder surface,and effectively solving the actuator saturation problem of traditional aircraft during lateral maneuvering. 展开更多
关键词 Morphing aircraft Lateral maneuver capability Incremental sliding mode control Multi-Lyapunov function method Control theory Control allocation law
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Dispatchable Capability of Aggregated Electric Vehicle Charging in Distribution Systems 认领 引用 被引量：1
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作者 Shiqian Wang Bo Liu +4 位作者 Yuanpeng Hua Qiuyan Li Binhua Tang Jianshu Zhou Yue Xiang 《Energy Engineering》 EI 2025年第1期129-152,共24页
This paper introduces a method for modeling the entire aggregated electric vehicle(EV)charging process and analyzing its dispatchable capabilities.The methodology involves developing a model for aggregated EV charging... This paper introduces a method for modeling the entire aggregated electric vehicle(EV)charging process and analyzing its dispatchable capabilities.The methodology involves developing a model for aggregated EV charging at the charging station level,estimating its physical dispatchable capability,determining its economic dispatchable capability under economic incentives,modeling its participation in the grid,and investigating the effects of different scenarios and EV penetration on the aggregated load dispatch and dispatchable capability.The results indicate that using economic dispatchable capability reduces charging prices by 9.7%compared to physical dispatchable capability and 9.3%compared to disorderly charging.Additionally,the peak-to-valley difference is reduced by 64.6%when applying economic dispatchable capability with 20%EV penetration and residential base load,compared to disorderly charging. 展开更多
关键词 Aggregated charging dispatchable capability peak shaving and valley filling the economics of charging demand response
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Damage capability of laser system in ground-air defense environments 认领 引用
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作者 Wei LIU Lin ZHANG +4 位作者 Wenfeng WANG Mingang ZHANG Jingyi ZHANG Feifei GAO Bo ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第12期430-445,共16页
A comprehensive model is proposed to evaluate the damage capability of laser system in ground-air defense environments.This model takes into account the laser system's heavy reliance on weather conditions and the ... A comprehensive model is proposed to evaluate the damage capability of laser system in ground-air defense environments.This model takes into account the laser system's heavy reliance on weather conditions and the stringent requirements for beam pointing accuracy.It initiates by simulating the laser spot characteristics on target in ground-to-air environments,factoring in the effects of atmospheric turbulence,absorption and scattering through slant transmission paths.Subsequently,a calculation method based on the thermal damage effect of the target material is introduced to quantify the damage ability of the laser system.To further enhance the model's applicability,a method for calculating the laser damage probability based on random crossover theory has been introduced,which takes into account the error of the Acquisition,Tracking and Pointing(ATP)system to estimate the likelihood of successful damage in operation applications.Theoretical analysis and simulation results validate the effectiveness of the proposed model in calculating and analyzing the damage capability of laser system in ground-air defense environments.This model offers valuable decision-making insights for users of laser systems operating in lowaltitude atmospheric conditions.Furthermore,it furnishes essential data support for the development and validation of laser systems,ensuring their effectiveness in real-world applications. 展开更多
关键词 Damage capability Laser system Laser spot Random crossing theory Thermal damage effect
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Observation on the Intervention Effect of Emergency Rescue Capability Among College Students 认领 引用
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作者 Beiyan Zhang 《Journal of Clinical and Nursing Research》 2025年第4期265-272,共8页
Objective:To explore the application effect of emergency rescue capability intervention among students in a university in Beijing.Methods:A total of 900 students from a university in Beijing in 2023 were selected as t... Objective:To explore the application effect of emergency rescue capability intervention among students in a university in Beijing.Methods:A total of 900 students from a university in Beijing in 2023 were selected as the research objects.Emergency rescue capability training was conducted from March 2023 to June 2023,once a month.The students’mastery of emergency rescue before and after the intervention was analyzed.Survey questionnaires were distributed to all college students to understand their channels and willingness to acquire emergency rescue knowledge.Results:A total of 886 valid questionnaires were collected in this study.The highest proportion of knowledge about China’s general emergency telephone number and how to dial the emergency rescue hotline was 100.00%.Among the strategies for dealing with cardiac arrest in CPR,the highest proportion was 336.34%.Among the four major first aid techniques of hemostasis,bandaging,fixation,transportation,the highest proportion of knowledge about the use of rubber band signs was 31.71%.Among the first aid techniques for heatstroke,poisoning,fire,and sharp instrument injuries,the principle of emergency treatment for severe gas poisoning had the highest proportion of 41.42%,showing significant differences.College students mainly acquire knowledge of emergency rescue capability through TV programs,health education lectures,and the internet.Around 61.40%of college students hope to learn more about prevention and control knowledge.Conclusion:After the intervention of emergency rescue capability,the emergency rescue capability of college students in this university has been significantly improved,showing a strong training effect,which is worthy of promotion. 展开更多
关键词 University Emergency rescue capability Emergency rescue capability intervention
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Dual Cross-linked Eucommia Ulmoides Gum with Reprocessibility,Shape Memory Capability and Broadband Sound Absorption at Low Frequency 认领 引用
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作者 Qing-Gang Ni Rui Mi +4 位作者 Biao Ou-Yang Jian-Hua Wu Peng Kong You-Ji Li Xiao-Chun Peng 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2025年第10期1875-1884,共10页
An inverse vulcanized polymer,SZIM combining Zn2+-imidazole coordination bonds and polysulfide bonds was synthesized and incorporated into bio-based Eucommia ulmoides gum (EUG) to generate EUG-SZIM-xs.The residual cry... An inverse vulcanized polymer,SZIM combining Zn2+-imidazole coordination bonds and polysulfide bonds was synthesized and incorporated into bio-based Eucommia ulmoides gum (EUG) to generate EUG-SZIM-xs.The residual crystallinity of the EUG matrix synergistically interacted with the dual cross-linking networks to establish reversible deformation domains,providing EUG-SZIM-xs with quick shape memory capability at moderate temperatures.The damping properties were also investigated,and EUG-SZIM-xs displayed high tanδ values (>0.3) when the SZIM dosage was higher than 5.5 phr,which showed a positive correlation with SZIM concentration.Such good damping performance endowed the EUG-SZIM-xs with broadband low-frequency sound absorption.In addition,the dual cross-linking networks endowed the materials with reprocessability under different catalytic systems,and the 1,8-diazobicyclic[5.4.0]undeca-7-ene (DBU)-catalyzed samples exhibited better mechanical properties than EUG-SZIM-xs. 展开更多
关键词 Eucommia ulmoides gum Inverse vulcanization Shape memory capability Reprocessibility Sound absorption
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Topological Structure Design and Obstacle-climbing Capability Analysis of a Lizard-inspired Torso-leg-foot Biomimetic Robot 认领 引用
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作者 Yuting Du Yan-an Yao +1 位作者 Qiang Ruan Wenbo Mi 《Journal of Bionic Engineering》 SCIE EI CSCD 2025年第1期65-82,共18页
Lizards are one of the most primitive reptiles in existence,with special limb structures that enable them to move quickly across diverse and complex terrains such as rock piles,shallow shoals,and deserts.A thorough ex... Lizards are one of the most primitive reptiles in existence,with special limb structures that enable them to move quickly across diverse and complex terrains such as rock piles,shallow shoals,and deserts.A thorough exploration was conducted on the biomimetic mechanism and ground-touching mechanism of lizard limbs from both micro and macro perspectives.Inspired by the intricate torso and limb configurations of lizards,a novel Torso-leg-foot biomimetic robot has been conceptualized based on the design of the Big-Foot robot.This robot integrates a Torso-leg-foot system,featuring a parallel torso biomimetic structure with a 2-SPR/UPU/UPR(P)configuration.It utilizes the theory of finite screws to articulate the instantaneous movements of the parallel torso,and the inverse kinematics of this mechanism have been calculated.The reachable workspace of the 2-SPR/UPU/UPR parallel mechanism using FIS theory,which is closely related to the climbing height of the robot.A comprehensive dimension synthesis was conducted on the leg-foot system,and the adoption of the three-pair rod drive method was determined by investigating its Variable Rotating Velocity Characteristics(VRVC).Simulation tests have shown that with an integrated torso,the robot can climb vertical obstacles up to 600 mm in height.The experimental tests of climbing steps and slopes using physical prototypes have confirmed the robot's obstacle-crossing capability.The potential applications of this Torso-leg-foot biomimetic robot is to carry heavy objects across obstacles to perform tasks such as planetary exploration and disaster relief. 展开更多
关键词 Torso-leg-foot Lizard biomimetics Topological structure Variable Rotating Velocity Characteristics(VRVC) Obstacle-climbing capability
Plasmonic dual-parameter biosensor with self-referencing capability based on one-dimensional metal gratings 认领 引用
18
作者 LIU Jun LUO Jianhua 《Optoelectronics Letters》 EI 2025年第8期449-454,共6页
There is limited amount of research on surface plasmon resonance(SPR)sensors with self-referencing capabilities which are based on dielectric gratings.In the short-wavelength range,a metal grating sensor is capable of... There is limited amount of research on surface plasmon resonance(SPR)sensors with self-referencing capabilities which are based on dielectric gratings.In the short-wavelength range,a metal grating sensor is capable of simultaneously measuring liquid refractive index under proposed temperature.A fabricated gold grating is placed on one side of a thin gold film for refractive index measurement,while the other with polydimethylsiloxane(PDMS)is deposited on the other side for temperature measurement.We use finite element analysis to research its sensing characteristics.Due to the high refractive index sensitivity of SPR sensors and thermo-optic coefficient of PDMS,we discovered the maximum spectral sensitivity of the sensor is 564 nm/RIU and-50 pm/℃when the liquid refractive index ranges from 1.30 to 1.40 with temperature ranging from 0℃ to 100℃.Numerical results indicate that there may not be mutual interference between two channels for measuring refractive index and temperature,which reduces the complexity of sensor measurements. 展开更多
关键词 thin gold film fabricated gold grating plasmonic biosensor metal grating sensor liquid refractive index self referencing capability refractive index dielectric gratingsin
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Research on evaluation of basic railway safety management capability based on combination weighting–TOPSIS 认领 引用
19
作者 Yankun Qi Xiaoyu Li +2 位作者 Jinghui Liu Hanqiu Li Chen Yang 《Railway Sciences》 2025年第1期108-122,共15页
Purpose–To systematically characterize and objectively evaluate basic railway safety management capability,creating a closed-loop management approach which allows continuous improvement and optimization.Design/method... Purpose–To systematically characterize and objectively evaluate basic railway safety management capability,creating a closed-loop management approach which allows continuous improvement and optimization.Design/methodology/approach–A basic railway safety management capability evaluation index system based on a comprehensive analysis of national safety management standards,railway safety rules and regulations and existing safety data from railway transport enterprises is presented.The system comprises a guideline layer including safety committee formation,work safety responsibility,safety management organization and safety rules and regulations as its components,along with an index layer consisting of 12 quantifiable indexes.Game theory combination weighting is utilized to integrate subjective and objective weight values derived using AHP and CRITIC methods and further combined using the TOPSIS method in order to construct a comprehensive basic railway safety management capability evaluation model.Findings–The case study presented demonstrates that this evaluation index system and comprehensive evaluation model are capable of effectively characterizing and evaluating basic railway safety management capability and providing directional guidance for its sustained improvement.Originality/value–Construction of an evaluation index system that is quantifiable,generalizable and accessible,accurately reflects the main aspects of railway transportation enterprises’basic safety management capability and provides interoperability across various railway transportation enterprises.The application of the game theoretic combination weighting method to derive composite weights which combine experts’subjective evaluations with the objectivity of data. 展开更多
关键词 Railway transportation enterprises Basic safety management capability Evaluation index system Combination weighting
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A Traceable Capability-based Access Control for IoT 认领 引用
20
作者 Chao Li Fan Li +3 位作者 Cheng Huang Lihua Yin Tianjie Luo Bin Wang 《Computers, Materials & Continua》 SCIE EI 2022年第9期4967-4982,共16页
Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with others.Cloud-based delegation solutions require that only the user who has registered in the cloud can be delegated p... Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with others.Cloud-based delegation solutions require that only the user who has registered in the cloud can be delegated permissions.It is not convenient when a permission is delegated to a large number of temporarily users.Therefore,some works like CapBAC delegate permissions locally in an offline way.However,this is difficult to revoke and modify the offline delegated permissions.In this work,we propose a traceable capability-based access control approach(TCAC)that can revoke and modify permissions by tracking the trajectories of permissions delegation.We define a time capability tree(TCT)that can automatically extract permissions trajectories,and we also design a new capability token to improve the permission verification,revocation and modification efficiency.The experiment results show that TCAC has less token verification and revocation/modification time than those of CapBAC and xDBAuth.TCAC can discover 73.3%unvisited users in the case of delegating and accessing randomly.This provides more information about the permissions delegation relationships,and opens up new possibilities to guarantee the global security in IoT delegation system.To the best of our knowledge,TCAC is the first work to capture the unvisited permissions. 展开更多
关键词 IoT access control permission delegation delegation trajectory capability revocation capability modification
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