In order to reduce the errors of the reliability of the retaining wall structure in the establishment of function, in the estimation of parameter and algorithm, firstly, two new reliability and stability models of ant...In order to reduce the errors of the reliability of the retaining wall structure in the establishment of function, in the estimation of parameter and algorithm, firstly, two new reliability and stability models of anti-slipping and anti-overturning based on the upper-bound theory of limit analysis were established, and two kinds of failure modes were regarded as a series of systems with multiple correlated failure modes. Then, statistical characteristics of parameters of the retaining wall structure were inferred by maximal entropy principle. At last, the structural reliabilities of single failure mode and multiple failure modes were calculated by Monte Carlo method in MATLAB and the results were compared and analyzed on the sensitivity. It indicates that this method, with a high precision, is not only easy to program and quick in calculation, but also without the limit of nonlinear functions and non-normal random variables. And the results calculated by this method which applies both the limit analysis theory, maximal entropy principle and Monte Carlo method into analyzing the reliability of the retaining wall structures is more scientific, accurate and reliable, in comparison with those calculated by traditional method.展开更多
针对现有电力通信网路由算法不能为业务分配双路由的问题,提出一种最可靠环路策略下的最大不相交双路由算法(the maximally disjoint routing algorithm under the most reliable loop strategy,MRMLS)。研究了公共通信网中三种类型的...针对现有电力通信网路由算法不能为业务分配双路由的问题,提出一种最可靠环路策略下的最大不相交双路由算法(the maximally disjoint routing algorithm under the most reliable loop strategy,MRMLS)。研究了公共通信网中三种类型的双路由算法,考虑了双路由算法可能面临的网络结构,阐述了采用最大不相交双路由算法的必要性。分析了最大不相交双路由的可靠性,并采用最可靠环路策略完成最大不相交双路由的分配工作。改进了原有最大不相交双路由算法,使所提算法充分考虑节点与链路的可靠性。仿真实验将MRMLS与其他两种方法进行对比,验证了MRMLS的可行性与有效性。展开更多
The fuzzy sets theory is introduced into the fatigue reliability analysis. The concepts of maximizing set and minimizing set are developed to decide the ordering value of each fuzzy number, and these values can be use...The fuzzy sets theory is introduced into the fatigue reliability analysis. The concepts of maximizing set and minimizing set are developed to decide the ordering value of each fuzzy number, and these values can be used to determine the order of the fuzzy numbers. On the basis of the works mentioned above, the membership function defining the fuzzy safety event can be calculated, and then the fuzzy reliability in the case of stress and fuzzy fatigue strength is deduced. An example is given to illustrate the method.展开更多
目的:考察友谊选择最优化决策问卷(Maximizing in Selecting Friends Scale,MSFS)中文版的适用性。方法:对625名大学生(样本1)施测MSFS问卷,用于项目分析和探索性因素分析;对863名大学生(样本2)施测MSFS问卷,用于验证性因素分析和信度...目的:考察友谊选择最优化决策问卷(Maximizing in Selecting Friends Scale,MSFS)中文版的适用性。方法:对625名大学生(样本1)施测MSFS问卷,用于项目分析和探索性因素分析;对863名大学生(样本2)施测MSFS问卷,用于验证性因素分析和信度检验。同时,采用大学生一般完美主义量表、自尊量表和后悔量表进行效标效度检验。对样本2中的400名大学生间隔二周后再次施测,检验重测信度。结果:友谊选择最优化决策问卷包括15个项目,由决策困难、选项搜索和完美标准3个维度构成。验证性因素分析表明该问卷结构效度良好。MSFS总问卷及决策困难、选项搜索、完美标准的Cronbachα系数分别为0.88、0.88、0.85、0.77,两周后的重测信度分别为0.86、0.78、0.77、0.79。各维度及总分与追求高标准、在乎缺点、选择后悔、特质后悔以及后悔总分显著正相关,MSFS问卷总分、选项搜索以及决策困难维度与自尊显著负相关。结论:友谊选择最优化决策问卷具有较好的心理测量学特性。展开更多
基金Project(2013CB036004) supported by the National Basic Research Program of ChinaProjects(51178468,51174086) supported by the National Natural Science Foundation of ChinaProject(201102) supported by the Open Foundation of Hunan Key Laboratory of Safe Mining Techniques of Coal Mines,China
文摘In order to reduce the errors of the reliability of the retaining wall structure in the establishment of function, in the estimation of parameter and algorithm, firstly, two new reliability and stability models of anti-slipping and anti-overturning based on the upper-bound theory of limit analysis were established, and two kinds of failure modes were regarded as a series of systems with multiple correlated failure modes. Then, statistical characteristics of parameters of the retaining wall structure were inferred by maximal entropy principle. At last, the structural reliabilities of single failure mode and multiple failure modes were calculated by Monte Carlo method in MATLAB and the results were compared and analyzed on the sensitivity. It indicates that this method, with a high precision, is not only easy to program and quick in calculation, but also without the limit of nonlinear functions and non-normal random variables. And the results calculated by this method which applies both the limit analysis theory, maximal entropy principle and Monte Carlo method into analyzing the reliability of the retaining wall structures is more scientific, accurate and reliable, in comparison with those calculated by traditional method.
文摘针对现有电力通信网路由算法不能为业务分配双路由的问题,提出一种最可靠环路策略下的最大不相交双路由算法(the maximally disjoint routing algorithm under the most reliable loop strategy,MRMLS)。研究了公共通信网中三种类型的双路由算法,考虑了双路由算法可能面临的网络结构,阐述了采用最大不相交双路由算法的必要性。分析了最大不相交双路由的可靠性,并采用最可靠环路策略完成最大不相交双路由的分配工作。改进了原有最大不相交双路由算法,使所提算法充分考虑节点与链路的可靠性。仿真实验将MRMLS与其他两种方法进行对比,验证了MRMLS的可行性与有效性。
基金This project is supported by National Naied Science Foundation of China(59475043). Manuscript received on July 8,1999 revised m
文摘The fuzzy sets theory is introduced into the fatigue reliability analysis. The concepts of maximizing set and minimizing set are developed to decide the ordering value of each fuzzy number, and these values can be used to determine the order of the fuzzy numbers. On the basis of the works mentioned above, the membership function defining the fuzzy safety event can be calculated, and then the fuzzy reliability in the case of stress and fuzzy fatigue strength is deduced. An example is given to illustrate the method.
文摘目的:考察友谊选择最优化决策问卷(Maximizing in Selecting Friends Scale,MSFS)中文版的适用性。方法:对625名大学生(样本1)施测MSFS问卷,用于项目分析和探索性因素分析;对863名大学生(样本2)施测MSFS问卷,用于验证性因素分析和信度检验。同时,采用大学生一般完美主义量表、自尊量表和后悔量表进行效标效度检验。对样本2中的400名大学生间隔二周后再次施测,检验重测信度。结果:友谊选择最优化决策问卷包括15个项目,由决策困难、选项搜索和完美标准3个维度构成。验证性因素分析表明该问卷结构效度良好。MSFS总问卷及决策困难、选项搜索、完美标准的Cronbachα系数分别为0.88、0.88、0.85、0.77,两周后的重测信度分别为0.86、0.78、0.77、0.79。各维度及总分与追求高标准、在乎缺点、选择后悔、特质后悔以及后悔总分显著正相关,MSFS问卷总分、选项搜索以及决策困难维度与自尊显著负相关。结论:友谊选择最优化决策问卷具有较好的心理测量学特性。
