Degradation and overstress failures occur in many electronic systems in which the operation load and environmental conditions are complex.The dependency of them called dependent competing failure process(DCFP),has bee...Degradation and overstress failures occur in many electronic systems in which the operation load and environmental conditions are complex.The dependency of them called dependent competing failure process(DCFP),has been widely studied.Electronic system may experience mutual effects of degradation and shocks,they are considered to be interdependent.Both the degradation and the shock processes will decrease the limit of system and cause cumulative effect.Finally,the competition of hard and soft failure will cause the system failure.Based on the failure mechanism accumulation theory,this paper constructs the shock-degradation acceleration and the threshold descent model,and a system reliability model established by using these two models.The mutually DCFP effect of electronic system interaction has been decomposed into physical correlation of failure,including acceleration,accumulation and competition.As a case,a reliability of electronic system in aeronautical system has been analyzed with the proposed method.The method proposed is based on failure physical evaluation,and could provide important reference for quantitative evaluation and design improvement of the newly designed system in case of data deficiency.展开更多
Middle censoring is an important censoring scheme,in which the actual failure data of an observation becomes unobservable if it falls into a random interval. This paper considers the statistical analysis of the depend...Middle censoring is an important censoring scheme,in which the actual failure data of an observation becomes unobservable if it falls into a random interval. This paper considers the statistical analysis of the dependent competing risks model by using the Marshall-Olkin bivariate Weibull(MOBW) distribution.The maximum likelihood estimations(MLEs), midpoint approximation(MPA) estimations and approximate confidence intervals(ACIs) of the unknown parameters are obtained. In addition, the Bayes approach is also considered based on the Gamma-Dirichlet prior of the scale parameters, with the given shape parameter.The acceptance-rejection sampling method is used to obtain the Bayes estimations and construct credible intervals(CIs). Finally,two numerical examples are used to show the performance of the proposed methods.展开更多
随着大语言模型(Large Language Models,LLMs)能力的提升及其广泛应用,社会正逐步从传统的人际交互转向融合人际交互、人机交互和机机交互的多层次互动结构。在人类与LLMs交互日益深入的背景下,研究人类如何感知LLMs成为了重要议题。本...随着大语言模型(Large Language Models,LLMs)能力的提升及其广泛应用,社会正逐步从传统的人际交互转向融合人际交互、人机交互和机机交互的多层次互动结构。在人类与LLMs交互日益深入的背景下,研究人类如何感知LLMs成为了重要议题。本研究通过三项研究系统考察人类对LLMs的感知模式。研究1发现,与对人类的感知一致,人类主要通过热情和能力两个维度感知LLMs。然而,在一般情境下,不同于对人类感知中的热情优先,人类在对LLMs的感知中能力优先。研究2探讨了热情和能力在不同态度预测中的优先效应,结果表明,热情与能力均能正向预测人类对LLMs的持续使用意愿和喜爱度,其中能力对持续使用意愿的预测效力更高,而热情对喜爱度的预测效力更高。研究3进一步探索了人类对LLMs与对他人的感知差异,结果显示,人类对LLMs的热情评价与人类无显著差异,但对LLMs的能力评价显著高于人类。本研究为理解人类对LLMs的感知提供了理论基础,并为人工智能的设计优化及人机协作机制的研究提供了新的视角。展开更多
基金supported by the National Natural Science Foundation of China(61503014,62073009)。
文摘Degradation and overstress failures occur in many electronic systems in which the operation load and environmental conditions are complex.The dependency of them called dependent competing failure process(DCFP),has been widely studied.Electronic system may experience mutual effects of degradation and shocks,they are considered to be interdependent.Both the degradation and the shock processes will decrease the limit of system and cause cumulative effect.Finally,the competition of hard and soft failure will cause the system failure.Based on the failure mechanism accumulation theory,this paper constructs the shock-degradation acceleration and the threshold descent model,and a system reliability model established by using these two models.The mutually DCFP effect of electronic system interaction has been decomposed into physical correlation of failure,including acceleration,accumulation and competition.As a case,a reliability of electronic system in aeronautical system has been analyzed with the proposed method.The method proposed is based on failure physical evaluation,and could provide important reference for quantitative evaluation and design improvement of the newly designed system in case of data deficiency.
基金supported by the National Natural Science Foundation of China(71571144 71401134)the Program of International Cooperation and Exchanges in Science and Technology Funded by Shaanxi Province(2016KW-033)
文摘Middle censoring is an important censoring scheme,in which the actual failure data of an observation becomes unobservable if it falls into a random interval. This paper considers the statistical analysis of the dependent competing risks model by using the Marshall-Olkin bivariate Weibull(MOBW) distribution.The maximum likelihood estimations(MLEs), midpoint approximation(MPA) estimations and approximate confidence intervals(ACIs) of the unknown parameters are obtained. In addition, the Bayes approach is also considered based on the Gamma-Dirichlet prior of the scale parameters, with the given shape parameter.The acceptance-rejection sampling method is used to obtain the Bayes estimations and construct credible intervals(CIs). Finally,two numerical examples are used to show the performance of the proposed methods.
文摘随着大语言模型(Large Language Models,LLMs)能力的提升及其广泛应用,社会正逐步从传统的人际交互转向融合人际交互、人机交互和机机交互的多层次互动结构。在人类与LLMs交互日益深入的背景下,研究人类如何感知LLMs成为了重要议题。本研究通过三项研究系统考察人类对LLMs的感知模式。研究1发现,与对人类的感知一致,人类主要通过热情和能力两个维度感知LLMs。然而,在一般情境下,不同于对人类感知中的热情优先,人类在对LLMs的感知中能力优先。研究2探讨了热情和能力在不同态度预测中的优先效应,结果表明,热情与能力均能正向预测人类对LLMs的持续使用意愿和喜爱度,其中能力对持续使用意愿的预测效力更高,而热情对喜爱度的预测效力更高。研究3进一步探索了人类对LLMs与对他人的感知差异,结果显示,人类对LLMs的热情评价与人类无显著差异,但对LLMs的能力评价显著高于人类。本研究为理解人类对LLMs的感知提供了理论基础,并为人工智能的设计优化及人机协作机制的研究提供了新的视角。
