东西部农村地区小学生社会情感能力差异研究———教师与家长教育行为的中介效应

选取北京、宁夏18所农村学校的4 074名3~6年级学生进行问卷调查,探究东西部农村地区小学生社会情感能力发展水平的差异,以及教师的表扬、批评与提问等教育行为与家长的关注行为是否对其具有显著的中介效应。研究结果发现：(1) 北京农村地区学生的社会情感能力总体优于宁夏,并且在自我认知维度的差异程度最大;(2) 在北京、宁夏农村地区,家长关注行为均处于较低水平,对学生社会情感能力发展水平差异的中介效应不显著;(3) 北京农村地区教师的积极教育行为相对较多,宁夏农村地区教师表现出更多的批评行为。前者对当地学生社会情感能力具有正向促进作用,而后者则产生了消极影响,从而在一定程度上导致了学生社会情感能力发展水平的差异。对此,在当前东西部农村家庭教育普遍缺失的情况下,激励西部农村教师积极教育行为,抑制其消极行为,是提升西部农村学生社会情感能力发展水平、缩小东西部差距的有效措施。     

基于损耗模型的纺织专用矢量变频调速系统节能技术

交流感应电机在纺织设备中广泛应用,其工作时间长、调速性能要求较高,因此在保证感应电机控制性能的前提下,降低纺织设备能耗以节约成本成为纺织行业一个亟待解决的问题.该文针对纺织设备的特性,在感应电机调速方法上采用转子磁场定向的矢量控制算法,并根据感应电机损耗模型求出最优转子磁链,实现了变频调速系统效率最优的控制算法.试验结果表明,该算法在保证调速系统性能的前提下,有效降低了变频调速系统的能耗,系统运行稳定,具有广泛的应用前景.     

全球金融动荡下中国宏观经济走势及合宜的政策选择

在全球金融动荡和世界经济衰颓趋势之下,中国宏观经济下滑似已成定势,而且这将不是一个短期现象,而很可能是一个较为缓慢的长期过程。在当前中国最宜采用的政策应该是以大幅度减税为主轴的财政政策。     

关于高校大学生理论学习型社团建设的几点思考

本文结合社团的组织特点以及大学生的时代特征,通过对枯燥的理论学习的深入思考,从理论学习、社团成员构成、组织文化建设、社团活动形式以及理论学习型社团在高校思想教育中的积极作用几个方面对大学生理论学习型社团建设进行简单的剖析并提出建设性意见。     

Union–intersection principle and constrained statistical inference

Most statistical models arising in real life applications as well as in interdisciplinary research are complex in their designs, sampling plans, and associated probability laws, which in turn are often constrained by inequality, order, functional, shape or other restraints. Optimality of conventional likelihood ratio based statistical inference may not be tenable here, although the use of restricted or quasi-likelihood has spurred in such environments. S.N. Roy's ingenious union–intersection principle provides an alternative avenue, often having some computational advantages, increased scope of adaptability, and flexibility beyond conventional likelihood paradigms. This scenario is appraised here with some illustrative examples, and with some interesting problems of inference on stochastic ordering (dominance) in parametric as well as beyond parametric setups.     

企业执行绩效评价指标及方法研究

传统的绩效评价体系往往侧重于对企业员工个人的绩效进行评价,而忽略了对企业中组织绩效的整体评价。为了完善企业的绩效考核体系,需要对企业中的组织绩效进行全面考核。基于此,提出了执行绩效的概念,对执行绩效管理在企业战略管理中的作用进行了分析。从执行成果和执行过程两个方面建立全方位的执行绩效评价指标体系,并在此基础上提出了执行绩效的评价方法。     

中国共产党政治建设的百年回望及现实意义

重视党的政治建设,注重从政治上建党强党是党的优良传统和宝贵经验。马克思主义政党的根本要求和马克思主义政党学说的核心要义是党的政治建设深厚的理论渊源。回望党的政治建设百年历程,党的政治建设作为党的建设的有机组成部分,贯穿革命、建设和改革全过程,经历了开端发展、深入推进、创新发展的演进历程,取得了重大成就,积累了宝贵经验。新时代深入推进党的政治建设是保持党的先进性和纯洁性的必然选择、应对化解各类矛盾风险挑战的迫切需要、发挥党员干部先锋模范作用的内在要求。     

A test for the variance residual life

In this paper we develop a test based on the empirical distribution function for the alternative representing 'decreasing variance residual life1 property. The test is consistent with asymptotically normal test statistic and is shown to perform well in the Pitman's asymptotic relative efficiency sense.     

Nonparametric repeated significance tests for some analysis of covariance models

For a general class of nonparametric analysis of covariance problems (with stochastic covariates), some repeated significance testing procedures are developed. These procedures rest on the construction of suitable rank order statistics based on the partial sequence of sample sizes and allow for a monitoring of experimentation with the objective of a possible early termination of experimentation. The basic theory is based on the weak convergence of certain stochastic processes relating to the rank order statistics. Various properties of the proposed tests are discussed.     

Social creativity as a function of agent cognition and network properties: A computer model

Inventions – concepts, devices, procedures – are often created by networks of interacting agents in which the agents can be individuals (as in a scientific discipline) or they can themselves be collectives (as in firms interacting in a market). Different collectives create and invent at different rates. It is plausible that the rate of invention is jointly determined by properties of the agents (e.g., their cognitive capacity) and by properties of the network of interactions (e.g., the density of the communication links), but little is known about such two-level interactions. We present an agent-based model of social creativity in which the individual agent captures key features of the human cognitive architecture derived from cognitive psychology, and the interactions are modeled by agents exchanging partial results of their symbolic processing of task information. We investigated the effect of agent and network properties on rates of invention and diffusion in the network via systematic parameter variations. Simulation runs show, among other results, that (a) the simulation exhibits network effects, i.e., the model captures the beneficial effect of collaboration; (b) the density of connections produces diminishing returns in term of the benefits on the invention rate; and (c) limits on the cognitive capacity of the individual agents have the counterintuitive consequence of focusing their efforts. Limitations and relations to other computer simulation models of creative collectives are discussed.