Relational schemas as sources of evaluation and misevaluation of leader–member exchanges: Some initial evidence

We investigated whether dyad members' relational schemas, a cognitive representation of exchange experiences, would affect how leaders and members evaluate and misevaluate the quality of their exchange relationships. Based on data derived from repertory grid technique and two waves of survey data, we found that leaders and members tended to form different relational schemas of their partners. While leaders developed LMX schemas focusing on work-related issues, members' schemas focused more on interpersonal concerns. These findings confirmed that the different schemas employed by each party affect how they stored, retrieved and (mis)evaluated their LMX experiences with each other. Implications for theory and practice, limitations of this study, and future research directions are discussed.     

Editorial

This paper uses the empirical characteristic function (ECF) procedure to estimate the parameters of mixtures of normal distributions. Since the characteristic function is uniformly bounded, the procedure gives estimates that are numerically stable. It is shown that, using Monte Carlo simulation, the finite sample properties of th ECF estimator are very good, even in the case where the popular maximum likelihood estimator fails to exist. An empirical application is illustrated using the monthl excess return of the Nyse value-weighted index.     

Local Linear Regression for Non Grid Spatiotemporal Models with Autoregressive Errors

In various environmental studies, spatiotemporal correlated data are involved, so there has been increasing demand of proposing spatiotemporal estimation methods that capture spatiotemporal correlation so as to improve the accuracy of estimation. In this article, we construct estimators for non grid spatiotemporal models with autoregressive errors. It is proved that the estimators are asymptotic normality. Simulation results also show the estimators perform well.     

自然灾害对增进我国电网安全的启示

2008年我国南方的电力系统受自然灾害的影响遭到极大的损毁,暴露出了电网在安全方面的许多薄弱环节,对于增进我国的电网安全具有十分重要的启示作用。本文通过对我国电网安全存在的问题的分析,提出了增进我国电网安全的建议和措施,在电力重建中具有一定的现实意义。     

论电网规划对电网建设用地的影响——以电网规划与城乡规划、土地利用规划间的关系为视角

电网规划是否纳入城乡规划和土地利用总体规划以及纳入的程度如何将对后续电网建设用地审批、用地物权保障、用地取得方式等诸多方面影响巨大。在当前城乡建设发展迅速,土地资源稀缺性日益突出的环境下,电网企业必须高瞻远瞩,高度重视电网规划的设计和纳入工作,依法确保电网规划纳入城乡总体规划和土地利用总体规划,纳入城乡详细性控制规划,从源头上解决电网建设用地难的问题。     

关于抽象绘画中的点、线、面

抽象形态点、线、面是抽象绘画的独有表现形式。画面中的每一个点、每一条线、每一块面都有自己独特的个性语言。虽然人们对此还是知之甚少。点、线、面之于抽象绘画,正如文学中的文字、音乐中的音符．它们在画面上的各种组合与排列关系。决定了画面的内在张力与实质。随着人们对其不断深入的研究与越来越精确的解读,抽象形态点、线、面的各种性格、语言、声音及其构成与表现形式也将不断凸现,对它们的应用也将达到一种可预见的广阔前景。     

基于DSP的并网PWM逆变器的的研究

针对风力发电系统的特性,提出基于DSP的全数字化PWM逆变器,该逆变器采用空间矢量调制算法,结构清晰,运算量小,实现方便。同时对系统脱网控制策略也进行了研究。实验结果证实了逆变器的可行性。     

舰船目标机载ISAR成像的最优观测角研究

SAR处理对三维转动的舰船成像会产生模糊效应,如果采用适当的ISAR处理方法对舰船成像,则舰船的三维转动不仅不会造成模糊,还会提高ISAR图像的分辨率和信息量.观测到的ISAR图像信息依赖于观测视角,要得到信息量最大的ISAR图像需要对观测视角进行优化设计.文中详细研究了舰船目标的机载ISAR成像特点,导出了ISAR图像信息量与观测视角的定量关系式,给出了求解最优观测视角的方法.仿真结果验证了该方法的有效性.     

田中一光的能剧海报艺术特征探析

日本平面设计大师田中一光设计的戏剧海报作品中,能剧海报独树一帜.能剧海报多以日本传统的能面形象为基本元素,结合理性严谨的方格骨格,采用热情饱满的日本民族色彩,巧妙处理虚实关系,是民族与国际、传统与现代完美结合的典范.     

平面应力状态主应力方向确定方法再探

文章给出了一种判断平面应力状态主应力方向的简便方法。