Comparison of preliminary test estimators based on generalized order statistics from proportional hazard family using Pitman measure of closeness

In this article, based on generalized order statistics from a family of proportional hazard rate model, we use a statistical test to generate a class of preliminary test estimators and shrinkage preliminary test estimators for the proportionality parameter. These estimators are compared under Pitman measure of closeness (PMC) as well as MSE criteria. Although the PMC suffers from non transitivity, in the first class of estimators, it has the transitivity property and we obtain the Pitman-closest estimator. Analytical and graphical methods are used to show the range of parameter in which preliminary test and shrinkage preliminary test estimators perform better than their competitor estimators. Results reveal that when the prior information is not too far from its real value, the proposed estimators are superior based on both mentioned criteria.     

Bivariate extension of (dynamic) cumulative past entropy

Recently, the concept of cumulative residual entropy (CRE) has been studied by many researchers in higher dimensions. In this article, we extend the definition of (dynamic) cumulative past entropy (DCPE), a dual measure of (dynamic) CRE, to bivariate setup and obtain some of its properties including bounds. We also look into the problem of extending DCPE for conditionally specified models. Several properties, including monotonicity, and bounds of DCPE are obtained for conditional distributions. It is shown that the proposed measure uniquely determines the distribution function. Moreover, we also propose a stochastic order based on this measure.     

Generalized Kerridge’s inaccuracy measure for conditionally specified models

Recently, conditional Renyi’s divergence of order α and Kerridge’s inaccuracy measures are studied by Navarro et al. (2014 Navarro, J., Sunoj, S.M., Linu, M.N. (2014). Characterizations of bivariate models using some dynamic conditional information divergence measures. Commun. Stat. Theory Methods 43:1939–1948.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]). In the present article, a generalized dynamic conditional Kerridge’s inaccuracy measure is introduced, which can be represented as the sum of conditional Renyi’s divergence and Renyi’s entropy. Some useful bounds are obtained using the concept of likelihood ratio order. The results are extended to weighted distributions. Sufficient conditions are obtained for the monotonicity of the proposed measure. Characterizations for bivariate exponential conditional distribution are presented based on the proposed measure.     

不对称信息下风险投资家与风险企业家之间的委托代理问题研究

风险投资体系以多重激励和不对称信息为特征,风险投资的三方利益主体之间存在着双重委托-代理关系,有效控制代理风险是风险投资高效运作的基本前提。本文基于信息经济学原理,分析了风险投资家与风险企业家之间代理风险的成因,并从委托人的角度讨论了风险治理的原则和投资契约的构造。     

湖南高校理工科大学生媒介素养教育调查与分析

提高媒介素养、加强媒介素养教育的呼声随着大众传媒日益深广的影响而显得越来越迫切。调查表明,理工科大学生对媒介资源的运用趋向理性,但对媒介素养的认知和批判能力的欠缺,反映了其媒介素养不够。同时,理工科大学生对媒介素养教育的主动参与性还远远不够。     

一般工科院校非英语专业大学生英语学习策略调查

本文运用定量研究的方法,调查了南昌航空工业学院509名非英语专业本科生英语学习策略.结果发现,一般院校非英语专业本科生在管理观念和策略、母语观念和策略功能操练观念和策略上存在很大问题,投入于英语学习的时间严重不足. 据此本文提出大学英语教学应以策略培训为基础,用英语教学,培养英语思维能力,强化学习动机.     

诗人的求真精神与初期白话新诗运动

初期白话新诗运动的兴起与新诗的倡导者、尝试者们的求真精神密切相关。"求真"精神就是在创作中融入诗人自身真实的人生体验,在诗歌中注入时代精神。求真精神是初期白话新诗运动的重要动力和艺术追求之一。理解了这一点,能较客观地分析白话新诗所呈现出来的内容和形式上的独特性;把握白话新诗与中国古典诗词的联系以及正确地看待外国诗歌对中国新诗的影响。     

政策性农业保险中投保农户道德风险的博弈分析

政策性农业保险是政府支持农业生产、稳定农户收入、促进农村可持续发展的农业支持保护体系的重要组成部分,近几年逐渐在全国各省市进行试点实施。农业保险市场上的信息不对称易引起逆向选择和道德风险问题,严重影响政策性农业保险市场的健康发展,制约农业保险作用的发挥。因此,有必要对政策性农业保险中投保农户的道德风险问题进行分析,以降低道德风险的发生,促进政策性农业保险的发展。     

工科院校中专业英语教学现状调查研究．

非英语专业学生专业英语能力的培养是培养复合型人才的基本要求,是大学英语素质教育的重要内容。因此旨在通过问卷调查、访谈等手段对理工科院校中非英语专业学生的专业英语教学现状进行调查研究。通过调研,了解了目前专业英语教学中存在的问题,并针对这些问题提出了相应的解决设想。