Aiming at the industry cyber-physical system(ICPS)where Denial-of-Service(DoS)attacks and actuator failure coexist,the integrated security control problem of ICPS under multi-objective constraints was studied.First,fr...Aiming at the industry cyber-physical system(ICPS)where Denial-of-Service(DoS)attacks and actuator failure coexist,the integrated security control problem of ICPS under multi-objective constraints was studied.First,from the perspective of the defender,according to the differential impact of the system under DoS attacks of different energies,the DoS attacks energy grading detection standard was formulated,and the ICPS comprehensive security control framework was constructed.Secondly,a security transmission strategy based on event triggering was designed.Under the DoS attack energy classification detection mechanism,for large-energy attacks,the method based on time series analysis was considered to predict and compensate for lost data.Therefore,on the basis of passive and elastic response to small energy attacks,the active defense capability against DoS attacks was increased.Then by introducing the conecomplement linearization algorithm,the calculation methods of the state and fault estimation observer and the integrated safety controller were deduced,the goal of DoS attack active and passive hybrid intrusion tolerance and actuator failure active fault tolerance were realized.Finally,a simulation example of a four-capacity water tank system was given to verify the validity of the obtained conclusions.展开更多
一、背景政治与社会研究校际联盟(The Interuniversity Consortium for Political and Social Research,ICPSR)①的历史可追溯至1962年,其最初名称为政治研究校际联盟(The Interuniversity Consortium for Political Research,ICPR)...一、背景政治与社会研究校际联盟(The Interuniversity Consortium for Political and Social Research,ICPSR)①的历史可追溯至1962年,其最初名称为政治研究校际联盟(The Interuniversity Consortium for Political Research,ICPR),由美国政治科学家Warren E.Miller等人发起创立,以作为美国全国选举研究的数据散播工具。其意义很快便超越了这一初衷,虽然其发展过程经历过一些波折(如就数据共享方面的问题),但在密歇根大学社会研究所(Institute for Social Research,ISR)及其相关人员的努力下,该联盟组织及其数据共享机制获得了较大的发展和壮大,目前该组织拥有世界上最大的用于政治与社会研究的数据库。展开更多
师幼互动作为幼儿园人际关系的核心,是促进幼儿语言综合能力发展的主要途径。幼儿园的阅读教学活动对幼儿今后的学业、行为能力以及社会性发展都有至关重要的作用,因此,越来越多的幼儿园在班级规模、师资力量、游戏空间等方面为师幼互...师幼互动作为幼儿园人际关系的核心,是促进幼儿语言综合能力发展的主要途径。幼儿园的阅读教学活动对幼儿今后的学业、行为能力以及社会性发展都有至关重要的作用,因此,越来越多的幼儿园在班级规模、师资力量、游戏空间等方面为师幼互动提供更好的条件。文章基于ICPS(Interpersonal Cognitive Problem Solving),就现阶段阅读教学中师幼互动存在的问题进行分析,并提出相应的改进建议。展开更多
基金supported by Gansu Higher Education Innovation Fund Project(No.2023B-439)。
文摘Aiming at the industry cyber-physical system(ICPS)where Denial-of-Service(DoS)attacks and actuator failure coexist,the integrated security control problem of ICPS under multi-objective constraints was studied.First,from the perspective of the defender,according to the differential impact of the system under DoS attacks of different energies,the DoS attacks energy grading detection standard was formulated,and the ICPS comprehensive security control framework was constructed.Secondly,a security transmission strategy based on event triggering was designed.Under the DoS attack energy classification detection mechanism,for large-energy attacks,the method based on time series analysis was considered to predict and compensate for lost data.Therefore,on the basis of passive and elastic response to small energy attacks,the active defense capability against DoS attacks was increased.Then by introducing the conecomplement linearization algorithm,the calculation methods of the state and fault estimation observer and the integrated safety controller were deduced,the goal of DoS attack active and passive hybrid intrusion tolerance and actuator failure active fault tolerance were realized.Finally,a simulation example of a four-capacity water tank system was given to verify the validity of the obtained conclusions.
文摘一、背景政治与社会研究校际联盟(The Interuniversity Consortium for Political and Social Research,ICPSR)①的历史可追溯至1962年,其最初名称为政治研究校际联盟(The Interuniversity Consortium for Political Research,ICPR),由美国政治科学家Warren E.Miller等人发起创立,以作为美国全国选举研究的数据散播工具。其意义很快便超越了这一初衷,虽然其发展过程经历过一些波折(如就数据共享方面的问题),但在密歇根大学社会研究所(Institute for Social Research,ISR)及其相关人员的努力下,该联盟组织及其数据共享机制获得了较大的发展和壮大,目前该组织拥有世界上最大的用于政治与社会研究的数据库。
文摘师幼互动作为幼儿园人际关系的核心,是促进幼儿语言综合能力发展的主要途径。幼儿园的阅读教学活动对幼儿今后的学业、行为能力以及社会性发展都有至关重要的作用,因此,越来越多的幼儿园在班级规模、师资力量、游戏空间等方面为师幼互动提供更好的条件。文章基于ICPS(Interpersonal Cognitive Problem Solving),就现阶段阅读教学中师幼互动存在的问题进行分析,并提出相应的改进建议。
