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面向21世纪我国高等学校体育教育专业教学方法体系结构及其发展趋向 被引量:38
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作者 张子沙 马卫平 +2 位作者 谭受清 吴宇强 周丽红 《体育科学》 CSSCI 北大核心 2000年第3期15-18,共4页
面向 2 1世纪我国高等体育教育专业教学方法体系结构是一个多因素、多序列、多层次的动态系统。它主要由学练类、协作类、教授类、科技类、能力类和情感类等 6类方法系列及其它们所包括的 2 5种具体方法所组成。这一体系结构的发展趋向... 面向 2 1世纪我国高等体育教育专业教学方法体系结构是一个多因素、多序列、多层次的动态系统。它主要由学练类、协作类、教授类、科技类、能力类和情感类等 6类方法系列及其它们所包括的 2 5种具体方法所组成。这一体系结构的发展趋向主要表现出系统化与综合性、多元化与扩展化、科学化与现代化、专业化与师范性等 4大特征。 展开更多
关键词 21世纪 体育教育专业 教学方法 发展趋向 中国
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三级倒立摆的数控稳定 被引量:25
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作者 杨亚炜 张明廉 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2000年第3期311-314,共4页
应用基于物理模型的拟人智能控制思想设计控制器 .结合单倒立摆系统模型的定性分析与三级倒立摆物理结构特性分析得到定性控制律 ,利用系统运动模态随反馈增益系数的转化规律 ,由智能搜索方法实现定性控制律的量化 ,成功实现计算机控制... 应用基于物理模型的拟人智能控制思想设计控制器 .结合单倒立摆系统模型的定性分析与三级倒立摆物理结构特性分析得到定性控制律 ,利用系统运动模态随反馈增益系数的转化规律 ,由智能搜索方法实现定性控制律的量化 ,成功实现计算机控制三级倒立摆系统长时间稳定 ,并给出各状态变量实测数据曲线图 .应用同样方法可以控制不同结构的三级倒立摆稳定 .证实了所采用方法的有效性和实验成果的可重复性 . 展开更多
关键词 三级倒立摆 数控稳定 定性分析 结构特性
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Blockchain-Assisted Secure Fine-Grained Searchable Encryption for a Cloud-Based Healthcare Cyber-Physical System 被引量:19
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作者 Mamta Brij B.Gupta +3 位作者 Kuan-Ching Li Victor C.M.Leun Kostas E.Psannis Shingo Yamaguchi 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2021年第12期1877-1890,共14页
The concept of sharing of personal health data over cloud storage in a healthcare-cyber physical system has become popular in recent times as it improves access quality.The privacy of health data can only be preserved... The concept of sharing of personal health data over cloud storage in a healthcare-cyber physical system has become popular in recent times as it improves access quality.The privacy of health data can only be preserved by keeping it in an encrypted form,but it affects usability and flexibility in terms of effective search.Attribute-based searchable encryption(ABSE)has proven its worth by providing fine-grained searching capabilities in the shared cloud storage.However,it is not practical to apply this scheme to the devices with limited resources and storage capacity because a typical ABSE involves serious computations.In a healthcare cloud-based cyber-physical system(CCPS),the data is often collected by resource-constraint devices;therefore,here also,we cannot directly apply ABSE schemes.In the proposed work,the inherent computational cost of the ABSE scheme is managed by executing the computationally intensive tasks of a typical ABSE scheme on the blockchain network.Thus,it makes the proposed scheme suitable for online storage and retrieval of personal health data in a typical CCPS.With the assistance of blockchain technology,the proposed scheme offers two main benefits.First,it is free from a trusted authority,which makes it genuinely decentralized and free from a single point of failure.Second,it is computationally efficient because the computational load is now distributed among the consensus nodes in the blockchain network.Specifically,the task of initializing the system,which is considered the most computationally intensive,and the task of partial search token generation,which is considered as the most frequent operation,is now the responsibility of the consensus nodes.This eliminates the need of the trusted authority and reduces the burden of data users,respectively.Further,in comparison to existing decentralized fine-grained searchable encryption schemes,the proposed scheme has achieved a significant reduction in storage and computational cost for the secret key associated with users.It has been verified b 展开更多
关键词 Cloud-based cyber-physical systems(CCPS) data encryption healthcare information search and retrieval keyword search public-key cryptosystems searchable encryption
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探测涡旋光束轨道角动量的新方法 被引量:19
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作者 刘曼 《光学学报》 EI CAS CSCD 北大核心 2013年第3期278-284,共7页
模拟了拉盖尔-高斯光束照射弱随机散射屏散射后在近场形成的光强和相位的分布,发现散射光场的光强分布图中有轮廓类似于孔雀羽毛状的光斑。这些光斑均匀分布在中心黑暗区域周围,且光斑的个数与涡旋光束的轨道角动量量子数有关,无论涡旋... 模拟了拉盖尔-高斯光束照射弱随机散射屏散射后在近场形成的光强和相位的分布,发现散射光场的光强分布图中有轮廓类似于孔雀羽毛状的光斑。这些光斑均匀分布在中心黑暗区域周围,且光斑的个数与涡旋光束的轨道角动量量子数有关,无论涡旋光束的轨道角动量量子数是整数还是分数,光斑的个数恰好是涡旋光束轨道角动量量子数的4倍。只是在分数轨道角动量量子数的光强分布图中,有一条狭缝沿水平方向将光斑均匀分裂成两瓣。该方法可用于探测涡旋光束的轨道角动量量子数。 展开更多
关键词 物理光学 成像系统 相位 衍射
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AI-Based Modeling and Data-Driven Evaluation for Smart Manufacturing Processes 被引量:16
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作者 Mohammadhossein Ghahramani Yan Qiao +2 位作者 Meng Chu Zhou Adrian O’Hagan James Sweeney 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2020年第4期1026-1037,共12页
Smart manufacturing refers to optimization techniques that are implemented in production operations by utilizing advanced analytics approaches. With the widespread increase in deploying industrial internet of things(I... Smart manufacturing refers to optimization techniques that are implemented in production operations by utilizing advanced analytics approaches. With the widespread increase in deploying industrial internet of things(IIOT) sensors in manufacturing processes, there is a progressive need for optimal and effective approaches to data management.Embracing machine learning and artificial intelligence to take advantage of manufacturing data can lead to efficient and intelligent automation. In this paper, we conduct a comprehensive analysis based on evolutionary computing and neural network algorithms toward making semiconductor manufacturing smart.We propose a dynamic algorithm for gaining useful insights about semiconductor manufacturing processes and to address various challenges. We elaborate on the utilization of a genetic algorithm and neural network to propose an intelligent feature selection algorithm. Our objective is to provide an advanced solution for controlling manufacturing processes and to gain perspective on various dimensions that enable manufacturers to access effective predictive technologies. 展开更多
关键词 Artificial intelligence(AI) cyber physical systems feature selection genetic algorithms(GA) industrial internet of things(IIOT) machine learning neural network(NN) smart manufacturing
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涡旋光束形成的散斑场光强和相位的分布特性 被引量:10
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作者 刘曼 《光学学报》 EI CAS CSCD 北大核心 2014年第11期294-300,共7页
通过对不同拓扑荷的涡旋光束经随机表面散射后在衍射区形成的横向和纵向光强分布的模拟,发现散斑颗粒的横向和纵向的平均尺寸比用高斯光束照明随机表面产生的散斑颗粒平均尺寸小很多,并且随着涡旋光束拓扑荷和光斑半径的增大而减小,同... 通过对不同拓扑荷的涡旋光束经随机表面散射后在衍射区形成的横向和纵向光强分布的模拟,发现散斑颗粒的横向和纵向的平均尺寸比用高斯光束照明随机表面产生的散斑颗粒平均尺寸小很多,并且随着涡旋光束拓扑荷和光斑半径的增大而减小,同时散斑场相位涡旋的密度随着涡旋光束拓扑荷和光斑半径的增大而增大。利用这种方法可以方便地选择不同拓扑荷和光斑半径的涡旋光束照射随机表面,得到合适的散斑颗粒来捕获更小的微粒。这种结果还可以用来降低散斑噪声。 展开更多
关键词 物理光学 成像系统 衍射
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金属材料科学发展的历程与人类思维方式的演变 被引量:5
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作者 谢佑卿 《材料导报》 EI CAS CSCD 北大核心 1998年第4期6-12,共7页
纵览了人类思维方式的演变、自然科学和金属材料科学发展的历程,阐述了金属材料及其理论的层次性和相关性。介绍了我们为实现金属材料科学设计的规划轮廓。
关键词 设计 系统论 金属材料 人类 思维方式
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On modeling of electrical cyber-physical systems considering cyber security 被引量:9
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作者 Yi-nan WANG Zhi-yun LIN +3 位作者 Xiao LIANG Wen-yuan XU Qiang YANG Gang-feng YAN 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2016年第5期465-478,共14页
This paper establishes a new framework for modeling electrical cyber-physical systems(ECPSs),integrating both power grids and communication networks. To model the communication network associated with a power transmis... This paper establishes a new framework for modeling electrical cyber-physical systems(ECPSs),integrating both power grids and communication networks. To model the communication network associated with a power transmission grid, we use a mesh network that considers the features of power transmission grids such as high-voltage levels, long-transmission distances, and equal importance of each node. Moreover, bidirectional links including data uploading channels and command downloading channels are assumed to connect every node in the communication network and a corresponding physical node in the transmission grid. Based on this model,the fragility of an ECPS is analyzed under various cyber attacks including denial-of-service(Do S) attacks, replay attacks, and false data injection attacks. Control strategies such as load shedding and relay protection are also verified using this model against these attacks. 展开更多
关键词 Cyber-physical systems Cyber attacks Cascading failure analysis Smart grid
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Cyber-Physical Electrical Energy Systems:Challenges and Issues 被引量:9
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作者 Xingyu Shi Yong Li +1 位作者 Yijia Cao Yi Tan 《CSEE Journal of Power and Energy Systems》 SCIE 2015年第2期36-42,共7页
Cyber-physical electrical energy systems(CPEES)combine computation,communication and control technologies with physical power system,and realize the efficient fusion of power,information and control.This paper summari... Cyber-physical electrical energy systems(CPEES)combine computation,communication and control technologies with physical power system,and realize the efficient fusion of power,information and control.This paper summarizes and analyzes related critical scientific problems and technologies,which are needed to be addressed with the development of CPEES.Firstly,since the co-simulation is an effective method to investigate infrastructure interdependencies,the co-simulation platform establishment of CPEES and its evaluation is overviewed.Then,a critical problem of CPEES is the interaction between energy and information flow,especially the influence of failures happening in information communication technology(ICT)on power system.In order to figure it out,the interaction is analyzed and the current analysis methods are summarized.For the solution of power system control and protection in information network environment,this paper outlines different control principles and illustrates the concept of distributed coordination control.Moreover,mass data processing and cluster analysis,architecture of communication network,information transmission technology and security of CPEES are summarized and analyzed.By solving the above problems and technologies,the development of CPEES will be significantly promoted. 展开更多
关键词 Cyber-physical electrical energy systems information communication technology power system smart grid
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基于光场调控的高时空分辨率光学成像 被引量:8
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作者 李润丰 施可彬 《光学学报》 EI CAS CSCD 北大核心 2019年第1期166-180,共15页
光学成像以其非侵入性的特点被广泛应用于生物医学、物理和化学等领域。通过对光场时域和空域参数的调控,可以有效调制光的时序、波前、振幅、相位、色散等特性,从而获得具有高时空分辨率的光学图像。以光场调控原理为主线,综述近年来... 光学成像以其非侵入性的特点被广泛应用于生物医学、物理和化学等领域。通过对光场时域和空域参数的调控,可以有效调制光的时序、波前、振幅、相位、色散等特性,从而获得具有高时空分辨率的光学图像。以光场调控原理为主线,综述近年来高时空分辨成像技术的研究进展。 展开更多
关键词 物理光学 成像系统 光学成像 超分辨 光场调控
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Digital Twin for Integration of Design-Manufacturing-Maintenance:An Overview 被引量:7
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作者 Yang Fu Gang Zhu +1 位作者 Mingliang Zhu Fuzhen Xuan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2022年第4期1-20,共20页
Traditional design,manufacturing and maintenance are run and managed independently under their own rules and regulations in an increasingly time-and-cost inefective manner.A unifed platform for efcient and intelligent... Traditional design,manufacturing and maintenance are run and managed independently under their own rules and regulations in an increasingly time-and-cost inefective manner.A unifed platform for efcient and intelligent designmanufacturing-maintenance of mechanical equipment and systems is highly needed in this rapidly digitized world.In this work,the defnition of digital twin and its research progress and associated challenges in the design,manufacturing and maintenance of engineering components and equipment were thoroughly reviewed.It is indicated that digital twin concept and associated technology provide a feasible solution for the integration of design-manufacturingmaintenance as it has behaved in the entire lifecycle of products.For this aim,a framework for information-physical combination,in which a more accurate design,a defect-free manufacturing,a more intelligent maintenance,and a more advanced sensing technology,is prospected. 展开更多
关键词 Digital twin Design-manufacturing-maintenance integration Artifcial intelligence Deep learning Information fusion Cyber-physical systems
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Analysis and Modeling of Mobile Phone Activity Data Using Interactive Cyber-Physical Social System
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作者 Farhan Amin Gyu Sang Choi 《Computers, Materials & Continua》 SCIE EI 2024年第9期3507-3521,共15页
Mobile networks possess significant information and thus are considered a gold mine for the researcher’s community.The call detail records(CDR)of a mobile network are used to identify the network’s efficacy and the ... Mobile networks possess significant information and thus are considered a gold mine for the researcher’s community.The call detail records(CDR)of a mobile network are used to identify the network’s efficacy and the mobile user’s behavior.It is evident from the recent literature that cyber-physical systems(CPS)were used in the analytics and modeling of telecom data.In addition,CPS is used to provide valuable services in smart cities.In general,a typical telecom company hasmillions of subscribers and thus generatesmassive amounts of data.From this aspect,data storage,analysis,and processing are the key concerns.To solve these issues,herein we propose a multilevel cyber-physical social system(CPSS)for the analysis and modeling of large internet data.Our proposed multilevel system has three levels and each level has a specific functionality.Initially,raw Call Detail Data(CDR)was collected at the first level.Herein,the data preprocessing,cleaning,and error removal operations were performed.In the second level,data processing,cleaning,reduction,integration,processing,and storage were performed.Herein,suggested internet activity record measures were applied.Our proposed system initially constructs a graph and then performs network analysis.Thus proposed CPSS system accurately identifies different areas of internet peak usage in a city(Milan city).Our research is helpful for the network operators to plan effective network configuration,management,and optimization of resources. 展开更多
关键词 Cyber-physical social systems big data cyber-physical systems pervasive computing smart city big data management techniques
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Cyber-Physical Production Systems for Data-Driven,Decentralized,and Secure Manufacturing-A Perspective 被引量:5
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作者 Manu Suvarna Ken Shaun Yap +3 位作者 Wentao Yang Jun Li Yen Ting Ng Xiaonan Wang 《Engineering》 SCIE EI 2021年第9期1212-1223,共12页
With the concepts of Industry 4.0 and smart manufacturing gaining popularity,there is a growing notion that conventional manufacturing will witness a transition toward a new paradigm,targeting innovation,automation,be... With the concepts of Industry 4.0 and smart manufacturing gaining popularity,there is a growing notion that conventional manufacturing will witness a transition toward a new paradigm,targeting innovation,automation,better response to customer needs,and intelligent systems.Within this context,this review focuses on the concept of cyber–physical production system(CPPS)and presents a holistic perspective on the role of the CPPS in three key and essential drivers of this transformation:data-driven manufacturing,decentralized manufacturing,and integrated blockchains for data security.The paper aims to connect these three aspects of smart manufacturing and proposes that through the application of data-driven modeling,CPPS will aid in transforming manufacturing to become more intuitive and automated.In turn,automated manufacturing will pave the way for the decentralization of manufacturing.Layering blockchain technologies on top of CPPS will ensure the reliability and security of data sharing and integration across decentralized systems.Each of these claims is supported by relevant case studies recently published in the literature and from the industry;a brief on existing challenges and the way forward is also provided. 展开更多
关键词 Smart manufacturing Cyber-physical production systems Industrial Internet of Things Data analytics Decentralized system Blockchain
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Analysis of cascading failures of power cyber-physical systems considering false data injection attacks 被引量:5
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作者 Jian Li Chaowei Sun Qingyu Su 《Global Energy Interconnection》 CAS CSCD 2021年第2期204-213,共10页
This study considers the performance impacts of false data injection attacks on the cascading failures of a power cyber-physical system,and identifies vulnerable nodes.First,considering the monitoring and control func... This study considers the performance impacts of false data injection attacks on the cascading failures of a power cyber-physical system,and identifies vulnerable nodes.First,considering the monitoring and control functions of a cyber network and power flow characteristics of a power network,a power cyber-physical system model is established.Then,the influences of a false data attack on the decision-making and control processes of the cyber network communication processes are studied,and a cascading failure analysis process is proposed for the cyber-attack environment.In addition,a vulnerability evaluation index is defined from two perspectives,i.e.,the topology integrity and power network operation characteristics.Moreover,the effectiveness of a power flow betweenness assessment for vulnerable nodes in the cyberphysical environment is verified based on comparing the node power flow betweenness and vulnerability assessment index.Finally,an IEEE14-bus power network is selected for constructing a power cyber-physical system.Simulations show that both the uplink communication channel and downlink communication channel suffer from false data attacks,which affect the ability of the cyber network to suppress the propagation of cascading failures,and expand the scale of the cascading failures.The vulnerability evaluation index is calculated for each node,so as to verify the effectiveness of identifying vulnerable nodes based on the power flow betweenness. 展开更多
关键词 Power cyber-physical systems False date injection attack Cascading failure VULNERABILITY Power flow betweenness.
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Residual-Based False Data Injection Attacks Against Multi-Sensor Estimation Systems 被引量:4
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作者 Haibin Guo Jian Sun Zhong-Hua Pang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2023年第5期1181-1191,共11页
This paper investigates the security issue of multisensor remote estimation systems.An optimal stealthy false data injection(FDI)attack scheme based on historical and current residuals,which only tampers with the meas... This paper investigates the security issue of multisensor remote estimation systems.An optimal stealthy false data injection(FDI)attack scheme based on historical and current residuals,which only tampers with the measurement residuals of partial sensors due to limited attack resources,is proposed to maximally degrade system estimation performance.The attack stealthiness condition is given,and then the estimation error covariance in compromised state is derived to quantify the system performance under attack.The optimal attack strategy is obtained by solving several convex optimization problems which maximize the trace of the compromised estimation error covariance subject to the stealthiness condition.Moreover,due to the constraint of attack resources,the selection principle of the attacked sensor is provided to determine which sensor is attacked so as to hold the most impact on system performance.Finally,simulation results are presented to verify the theoretical analysis. 展开更多
关键词 Cyber-physical systems(CPSs) false data injection(FDI)attacks remote state estimation stealthy attacks
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A Review on Cybersecurity Analysis,Attack Detection,and Attack Defense Methods in Cyber-physical Power Systems 被引量:4
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作者 Dajun Du Minggao Zhu +4 位作者 Xue Li Minrui Fei Siqi Bu Lei Wu Kang Li 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2023年第3期727-743,共17页
Potential malicious cyber-attacks to power systems which are connected to a wide range of stakeholders from the top to tail will impose significant societal risks and challenges.The timely detection and defense are of... Potential malicious cyber-attacks to power systems which are connected to a wide range of stakeholders from the top to tail will impose significant societal risks and challenges.The timely detection and defense are of crucial importance for safe and reliable operation of cyber-physical power systems(CPPSs).This paper presents a comprehensive review of some of the latest attack detection and defense strategies.Firstly,the vulnerabilities brought by some new information and communication technologies(ICTs)are analyzed,and their impacts on the security of CPPSs are discussed.Various malicious cyber-attacks on cyber and physical layers are then analyzed within CPPSs framework,and their features and negative impacts are discussed.Secondly,two current mainstream attack detection methods including state estimation based and machine learning based methods are analyzed,and their benefits and drawbacks are discussed.Moreover,two current mainstream attack defense methods including active defense and passive defense methods are comprehensively discussed.Finally,the trends and challenges in attack detection and defense strategies in CPPSs are provided. 展开更多
关键词 Cyber-physical power systems security threat attack detection attack defense state estimation machine learning
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高熵非晶合金设计、制备及性能的研究进展 被引量:5
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作者 种凯 张志彬 +1 位作者 邹勇 梁秀兵 《材料导报》 EI CAS CSCD 北大核心 2021年第17期17019-17025,共7页
高熵非晶合金是一种新兴的合金材料,兼具高熵合金成分特征与非晶合金结构特征,因具有优异的机械物理性能与巨大的应用潜力而受到了广泛的关注。目前高熵非晶合金的研究处于起步阶段,本文介绍了高熵非晶合金成分设计的基本依据,着重分析... 高熵非晶合金是一种新兴的合金材料,兼具高熵合金成分特征与非晶合金结构特征,因具有优异的机械物理性能与巨大的应用潜力而受到了广泛的关注。目前高熵非晶合金的研究处于起步阶段,本文介绍了高熵非晶合金成分设计的基本依据,着重分析了高熵非晶合金的关键物理参量(混合熵ΔS_(mix)、混合焓ΔH_(mix)、原子错配度δ)等对高熵非晶材料组织结构的影响。当前已开发的高熵非晶合金材料体系有限,制备方法继承了非晶合金与高熵合金的制备特征,其制备手段大致可以分为:液相法、气相法以及固相法。由于其优异的热力学性能,高熵非晶合金有望通过热喷涂手段突破尺寸限制,实现大规模应用。高熵非晶合金性能的研究主要集中在力学性能、耐腐蚀性能、磁性能、非晶形成能力与热稳定性等方面。其中高熵效应对非晶形成能力的影响、高熵非晶合金的结构与热力学特性及高熵非晶合金的异常热稳定性等科学问题亟待解决。本文还展望了基于材料基因工程理念的高熵非晶合金材料体系研究及该类材料的应用前景。 展开更多
关键词 高熵非晶 物理参数 材料体系 性能
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Cyber-Syndrome:Concept,Theoretical Characterization,and Control Mechanism
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作者 Feifei Shi Huansheng Ning +1 位作者 Liming Chen Sahraoui Dhelim 《Tsinghua Science and Technology》 SCIE EI CAS CSCD 2024年第3期721-735,共15页
The prevalence of social media and mobile computing has led to intensive user engagement in the emergent Cyber-Physical-Social-Thinking(CPST)space.However,the easy access,the lack of governance,and excessive use has g... The prevalence of social media and mobile computing has led to intensive user engagement in the emergent Cyber-Physical-Social-Thinking(CPST)space.However,the easy access,the lack of governance,and excessive use has generated a raft of new behaviors within CPST,which affects users’physical,social,and mental states.In this paper,we conceive the Cyber-Syndrome concept to denote the collection of cyber disorders due to excessive or problematic Cyberspace interactions based on CPST theories.Then we characterize the Cyber-Syndrome concept in terms of Maslow’s theory of Needs,from which we establish an in-depth theoretical understanding of Cyber-Syndrome from its etiology,formation,symptoms,and manifestations.Finally,we propose an entropy-based Cyber-Syndrome control mechanism for its computation and management.The goal of this study is to give new insights into this rising phenomenon and offer guidance for further research and development. 展开更多
关键词 Cyber-Syndrome cyber-physical systems Cyber-physical-Social-Thinking(CPST)space Maslow’sHierarchy of Needs ENTROPY
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Cyber-Physical Resilience Enhancement for Power Transmission Systems with Energy Storage Systems
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作者 Wenhao Zhang Dongyang Rui +3 位作者 Weihong Wang Yang Guo Zhaoxia Jing Wenhu Tang 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2024年第2期844-855,共12页
In a power system, when extreme events occur, such as ice storm, large scale blackouts may be unavoidable. Such small probability but high risk events have huge impact on power systems. Most resilience research in pow... In a power system, when extreme events occur, such as ice storm, large scale blackouts may be unavoidable. Such small probability but high risk events have huge impact on power systems. Most resilience research in power systems only considers faults on the physical side, which would lead to overly idealistic results. This paper proposes a two-stage cyber-physical resilience enhancement method considering energy storage (ES) systems. The first stage calculates optimal planning of ES systems, and the second stage assesses resilience and enhancement of ES systems during the disaster. In the proposed model, cyber faults indirectly damage the system by disabling monitoring and control function of control center. As a result, when detection and response process of physical faults are blocked by cyber failures, serious load shedding occurs. Such a cyber-physical coupling mechanism of fault, response, restoration process is demonstrated in the modified IEEE Reliable Test System-79 (RTS-79). Simulation results show compared with the physical-only system, the cyber-physical system has a more accurate but degraded resilient performance. Besides, ES systems setting at proper place effectively enhance resilience of the cyber-physical transmission system with less load Shedding. 展开更多
关键词 Cyber-physical faults energy storage systems resilience enhancement transmission systems
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量子计算模拟物理系统进展
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作者 栾添 匡学衡 +1 位作者 王维 岳寰宇 《计算机科学与探索》 CSCD 北大核心 2024年第11期2787-2797,共11页
当前量子计算作为量子科技的前沿领域,在模拟物理系统方面取得了显著进展,但仍面临硬件噪声、量子误差等技术挑战。综述了量子计算在物理系统模拟中的最新进展,聚焦于量子-经典混合算法和错误缓解技术的应用,探讨其在不同物理系统中的... 当前量子计算作为量子科技的前沿领域,在模拟物理系统方面取得了显著进展,但仍面临硬件噪声、量子误差等技术挑战。综述了量子计算在物理系统模拟中的最新进展,聚焦于量子-经典混合算法和错误缓解技术的应用,探讨其在不同物理系统中的优势与局限性。研究内容包括基于超导量子计算机的分子体系模拟、凝聚态物理系统的多体问题模拟、复杂流体力学系统的方程求解,以及在天体物理与高能物理中的应用。针对分子体系,变分量子算法(VQE)被广泛用于求解多电子体系的基态能量,并通过错误缓解方法提升了模拟的准确性。对于凝聚态物理系统,量子计算在模拟强关联自旋模型方面展现出较高的精度和效率,特别是在更大规模的自旋链模拟中实现了前所未有的精确度。流体力学领域的研究表明,量子-经典混合算法在求解纳维-斯托克斯方程时,能够实现一定程度的加速,为未来的流体动力学研究提供了新的工具。天体物理模拟中,量子计算被用于黑洞和暗物质性质的研究,展示了潜在的指数级加速能力,为理解宇宙中极端条件下的物理现象提供了可能性。在高能物理领域,量子计算在解决施温格模型等问题中表现出良好的应用前景,并初步探索了量子机器学习在高能实验数据分析中的潜力。为量子计算在多领域物理系统模拟的应用提供了全面的视角,指出了未来的发展方向与技术挑战。 展开更多
关键词 量子计算 量子模拟 物理系统 量子算法
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