Convolutions and generalization of logconcavity: Implications and applications

Additive convolution of unimodal and α‐unimodal random variables are known as an old classic problem which has attracted the attention of many authors in theory and applied fields. Another type of convolution, called multiplicative convolution, is rather younger. In this article, we first focus on this newer concept and obtain several useful results in which the most important ones is that if is logconcave then so are and for some suitable increasing functions ?. This result contains and as two more important special cases. Furthermore, one table including more applied distributions comparing logconcavity of f(x) and and two comprehensive implications charts are provided. Then, these fundamental results are applied to aging properties, existence of moments and several kinds of ordered random variables. Multiplicative strong unimodality in the discrete case is also introduced and its properties are investigated. In the second part of the article, some refinements are made for additive convolutions. A remaining open problem is completed and a conjecture concerning convolution of discrete α‐unimodal distributions is settled. Then, we shall show that an existing result regarding convolution of symmetric discrete unimodal distributions is not correct and an easy alternative proof is presented. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 109–123, 2016     

火灾统计失实问题的现状及对策

以四川省为例介绍火灾统计失实的情况 ,并分析火灾统计失实问题的原因 ,提出纠正火灾统计失实问题的工作意见。     

单兵模拟射击训练的数据统计方法研究

提出了对单兵模拟射击训练系统射击数据的新统计方法。该方法针对射击需要，在初步的数据统计后，利用统计学理论，针对性地设计了射击数据二次处理统计指标。新的统计指标不仅使射击训练水平更加精确高效，同时使射击指挥更加科学合理。     

Signature based analysis of m‐Consecutive‐k‐out‐of‐n: F systems with exchangeable components

In this article, we study reliability properties of m‐consecutive‐k‐out‐of‐n: F systems with exchangeable components. We deduce exact formulae and recurrence relations for the signature of the system. Closed form expressions for the survival function and the lifetime distribution as a mixture of the distribution of order statistics are established as well. These representations facilitate the computation of several reliability characteristics of the system for a given exchangeable joint distribution or survival function. Finally, we provide signature‐based stochastic ordering results for the system's lifetime and investigate the IFR preservation property under the formulation of m‐consecutive‐k‐out‐of‐n: F systems. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

少数民族双语教师汉语言能力提高与学历层次提升的培训策略研究

研究和分析民族教师学习汉语的一些动力因素,正确引导他们学习汉语的动机,有利于激发这一群体学习的内部动力,进而提高民族教师的整体素质,为新疆少民族地区教育的发展奠定基础。     

论现代大学治理下的权力配置

中国特色的现代大学治理是大学政党权力、行政权力、学术权力等多元权力优化配置和协调平衡的制度保障;现代大学治理下如何处理和配置好大学的多元权力,构建现代大学治理下的权力保障制度,应建立多方参与的董事会制度、党政联席会议制度、教授主导下的学术制度、教师学生参与决策管理的监事会议制度等。     

基于量化分析的我国慕课研究综述

以慕课(MOOC)为代表的在线课程以崭新的教学模式、显著的发展优势以及对现代教育教学模式的冲击迅速在全世界掀起了热潮。文章以近三年来我国慕课研究领域相关的学术文献为研究对象,通过SATI、EXCEL、UCINET、SPSS等量化分析软件对相关学术文献进行关键词抽取、多维尺度分析以及共词网络分析,探讨了我国MOOC领域高频关键词之间的内在关系,描述了国内MOOC领域的研究现状,阐述了我国MOOC领域的研究重点,从而为我国MOOC领域的进一步研究提供参考。     

基于方差分析的RSA计时攻击

结合差分统计分析方法,引入方差分析假设检验,提出一种可行的计时攻击算法,并针对RSA算法的软件应用进行攻击实验。实验结果表明,该攻击算法不仅比传统攻击方式具有更高的可行性,而且能够适用于不同密钥长度的攻击。     

《军事语言研究》创刊实践及其发展战略

军事语言学的确立,填补了我国军事学学科体系中的一项空白,具有开创性的意义。《军事语言研究》学术期刊的创办,必将把这一新兴学科推向新的发展阶段。创办《军事语言研究》学术期刊,有其进行理论研究和推进部队现代化建设的现实需要。基于一年多的办刊实践,从注重创新性、突出办刊特色、不断拓展和延伸刊物内涵三个方面探讨了该刊的发展战略问题。     

主被动传感器异地配置下的航迹关联

在雷达和电子支援(ESM)传感器异地配置的情况下,提出了一种基于位置统计量和最大似然准则的异类传感器航迹关联算法。首先基于位置统计量对目标进行了航迹粗关联,排除掉一些虚假关联组合;然后采用最大似然准则对目标进行了航迹细关联,以求进一步提高雷达和ESM传感器航迹关联的检测概率。仿真结果表明,该算法能够快速、准确地完成对多目标的航迹关联。