《核电档案分类准则及编码规则》的修订建议

《核电档案分类准则及编码规则》的实施解决了国内核电企业档案分类与编码的行业标准有与无的问题,固化了国内核电企业档案管理对文件分类与编码成果的继承要求,拓展了国内核电企业档案分类与编码的实践空间.面对核电行业信息化及职能管理变化趋势,后续修订需进一步体现档案类目设置的扁平化,强化二级综合类的设置,保证职能分类的一致性,容纳文件编码与档案编码的同一性做法。     

Consistency of information criteria for model selection with missing data

ABSTRACT

In this paper, we investigate the consistency of the Expectation Maximization (EM) algorithm-based information criteria for model selection with missing data. The criteria correspond to a penalization of the conditional expectation of the complete data log-likelihood given the observed data and with respect to the missing data conditional density. We present asymptotic properties related to maximum likelihood estimation in the presence of incomplete data and we provide sufficient conditions for the consistency of model selection by minimizing the information criteria. Their finite sample performance is illustrated through simulation and real data studies.     

Construction of some compound criteria via A-optimality

Abstract

This paper is devoted to attain multiple objects via proposing two compound optimality criteria constructed with A-optimality criterion. The offered compound criteria are ADP-optimality to seek about an optimal design for minimizing the average variance, having an efficient parameter estimates, likewise, maximizing the probability of a particular event and AKL-optimality that provides an identified balance between model discrimination and minimizing the average variance of the parameter estimates. The equivalence theorems are stated and proved. Finally, a numerical example is applied on probit GLMs to illustrate the results for both compound criteria.     

A Variable Selection Method for Analyzing Supersaturated Designs

Supersaturated designs are a large class of factorial designs which can be used for screening out the important factors from a large set of potentially active variables. The huge advantage of these designs is that they reduce the experimental cost drastically, but their critical disadvantage is the confounding involved in the statistical analysis. In this article, we propose a method for analyzing data using several types of supersaturated designs. Modifications of widely used information criteria are given and applied to the variable selection procedure for the identification of the active factors. The effectiveness of the proposed method is depicted via simulated experiments and comparisons.     

Exponentiated power Lindley power series class of distributions: Theory and applications

ABSTRACT

We introduce a new four-parameter generalization of the exponentiated power Lindley (EPL) distribution, called the exponentiated power Lindley power series (EPLPS) distribution. The new distribution arises on a latent complementary risks scenario, in which the lifetime associated with a particular risk is not observable; rather, we observe only the minimum lifetime value among all risks. The distribution exhibits a variety of bathtub-shaped hazard rate functions. It contains as particular cases several lifetime distributions. Various properties of the distribution are investigated including closed-form expressions for the density function, cumulative distribution function, survival function, hazard rate function, the rth raw moment, and also the moments of order statistics. Expressions for the Rényi and Shannon entropies are also given. Moreover, we discuss maximum likelihood estimation and provide formulas for the elements of the Fisher information matrix. Finally, two data applications are given showing flexibility and potentiality of the EPLPS distribution.     

卓越教师评价标准比较及启示

卓越教师评价标准的建立与实施对教师专业发展起着重要的引导作用。美国、英国、澳大利亚、中国香港等国家或地区的卓越教师评价体系,在教师的知识结构、能力结构、教学成果、社区服务等方面具有一些共同特征,同时在教师能力结构、价值导向等方面又有各自的侧重。卓越教师评价标准应进一步体现卓越教师的实践专长,突出卓越教师作为教学变革的领导者,强化其对卓越教师培养过程的助推功能。     

基于协调发展度的重大工程团队免疫系统健康评价研究

为评价重大工程团队免疫系统的健康和协调发展状况，本文提出了一种基于协调发展度的评价模型。首先通过文献查询和深度访谈，构建能够体现重大工程团队免疫系统特征的健康评价指标体系；其次利用改进的DEMATEL确定指标权重，然后采用多层次模糊综合评价将相关指标定量化，最终得出重大工程团队免疫系统的健康指数和协调发展度；再次确立重大工程团队免疫系统健康等级和协调发展度划分标准，同时提出免疫系统健康的跟踪评价策略；最后，利用本文模型对某跨国输气管道工程团队的免疫系统进行实证研究。结果表明，协调发展度模型既能反映重大工程团队免疫系统的整体健康程度，又能衡量固有性免疫和适应性免疫的协调发展状况，同时对免疫系统健康的跟踪评价也取得了良好效果。     

Risk-Informed Requirements for Design and Assessment of Structures Under Temporary Use

The relatively high failure rates, with important consequences in many cases, suggest that the implicitly acceptable risk levels corresponding to temporary civil engineering structures and activities might exceed the bounds of normally acceptable levels associated with different societal activities. Among other reasons, this may be attributed to the lack of a rational approach for the assessment of risks associated with the different technologies supporting these activities in general, and for structures in particular. There is a need for establishing appropriate target reliability levels for structures under temporary use taking into account specific circumstances such as reduced risk exposure times. This issue is being addressed in this article. Acceptance criteria for building-structure-related risks to persons obtained in prior studies are adapted to the special circumstances of nonpermanent risk exposure. Thereby, the general principle followed is to maintain the same risk levels per time unit as for permanently occupied buildings. The adaptation is based on the statistical annual fatality rate, a life safety risk metric that allows for a consistent comparison of risks across different societal activities and technologies. It is shown that the target reliability indices taking account of the temporary use of buildings might be significantly higher than the values suggested for permanently used structures.     

Macroeconomic performance of inflation targeting in European and Asian emerging economies

The macroeconomic performance resulting from adopting an inflation targeting policy in emerging economies of Europe and Central Asia are examined. The research includes 26 countries in the period 1997–2019, with a special focus on the period 2008–2019. Our econometric analysis consists of two approaches: dynamic panel modeling and propensity score matching. The results suggest that macroeconomic performance has improved due to the inflation targeting monetary framework. We find that a policy of inflation targeting has been effective in reducing the inflation rate, inflation volatility, and GDP volatility. The results are particularly robust for the subperiod that started in 2008. Econometric results suggest that inflation targeting policy did not affect inflation persistence or GDP growth. Our results suggest that inflation targeting improves the macroeconomic performance of developing countries even when they only partially meet the standard requirements for its implementation.     

扶贫瞄准中贫困户竞争与协同行为的演化博弈分析

扶贫瞄准过程是贫困户采取竞争和协同行为不断进行博弈的过程。行为演化的结果取决于两类贫困户扶贫协同收益和协同成本的对比关系,只有当协同收益都大于协同成本时,博弈才会向两者都选择协同行为的方向演化。协同收益及其分享系数、协同成本及其分担系数是影响贫困户行为演化路径的关键因素,政府的财政补贴能够改变贫困户的策略选择,并存在一个最佳的补贴临界点,使贫困户都选择协同行为。政府应该采取相应措施,促进博弈向协同方向演化。