广西电网调峰电源的探讨与选择

当前,广西电力需求不断增长,峰谷差加大及电源结构调整将使电力系统的调峰问题愈来愈突出,电网的调峰压力日益加大,解决电网的调峰问题已成为广西电网面临的一个重要课题。文章对广西电网全年逐月典型日负荷曲线进行模拟计算,充分考虑电力系统中各类电站的技术经济能力,分析广西电网近远期调峰需求,比较论证现有和规划调峰电源建设条件,提出可行的调峰电源建设方案,对广西抽水蓄能电站的布局提出合理建议。     

Beyond Publication Bias

Abstract.  This review considers several meta‐regression and graphical methods that can differentiate genuine empirical effect from publication bias. Publication selection exists when editors, reviewers, or researchers have a preference for statistically significant results. Because all areas of empirical research are susceptible to publication selection, any average or tally of significant/insignificant studies is likely to be biased and potentially misleading. Meta‐regression analysis can see through the murk of random sampling error and selected misspecification bias to identify the underlying statistical structures that characterize genuine empirical effect. Meta‐significance testing and precision‐effect testing (PET) are offered as a means to identify empirical effect beyond publication bias and are applied to four areas of empirical economics research – minimum wage effects, union‐productivity effects, price elasticities, and tests of the natural rate hypothesis.     

混凝土结构桥梁的耐久性探讨

随着公路交通量不断增加,桥梁负荷日趋严重,造成混凝土结构桥梁出现各种各样的病害,严重影响到桥梁结构的使用寿命,因而对混凝土结构的耐久性设计尤为重要。     

CANDU6慢化剂系统丧失冷却情况下的温度分析

压力管卧式重水反应堆（CANDU6）具有相互独立的冷却剂系统和慢化剂系统。慢化剂系统将堆芯高能裂变中子慢化到能维持持续裂变所需的热中子水平,并将慢化中子过程中产生的热量带出。在反应堆大修期间,需要对再循环冷却水系统（RCW）进行检修,则需要并投入其备用系统,但是RCW备用系统仅对反应堆冷却剂系统进行冷却,不提供慢化剂系统热交换器冷却水。所以在RCW备用系统投入的情况下,慢化剂系统丧失冷却。为判断在此情况下慢化剂的温度变化情况,本文对CANDU6大修期间慢化剂系统丧失冷却情况下的温度变化进行分析并与试验结果进行比较,评估是否会由于温度过高而导致系统失效。     

输入输出理论在大学英语教学中的应用

输入与输出理论侧重点不同。在大学英语教学中应做到输入、输出并重,并结合读写课和视听说课的实际,采用大班授课和小班授课相结合的教学方式,并辅助网络多媒体自主学习,提高学生的语言运用能力。     

投资组合VaR分解的应用研究

针对VaR的不足,Garman M．于1997年提出了成分VaR和边际VaR。采用德尔塔——正态法度量投资组合的VaR、边际VaR和成分VaR,使用假设检验法对模型进行回测的研究结果表明,该计算方法下的VaR模型有效,边际VaR和成分VaR能为资产管理者提供更多有关投资组合风险的信息。     

Using involvement to enhance employee engagement in IT firms: examining leadership initiatives in a key developing national context

Many organisational leaders increasingly use employee involvement to serve their interests, spurred by the unitarist rationale of leader‐member exchange (LMX). Existing research into employee involvement and participation (EIP) management has mainly focused on manufacturing firms in advanced economies and has not kept pace with developments in settings where practice is primarily governed by organisational leaders plus greater use is made of informal and technologically assisted EIP. Consequently, this paper investigates the management of EIP in IT firms at the forefront of these developments in India. The findings reveal how an array of informal initiatives, including social media, are being used to permeate traditional LMX and EIP boundaries to reinforce unitarist leadership goals. Limitations to some of these initiatives are elucidated, as they are unevenly used and contested by employees. Thus, the paper contributes to critiques of LMX as an ancillary framework for EIP.     

地区电网负荷特性研究

通过对株洲电网2000-2008年电力负荷数据进行分析,包括用电结构、典型日负荷特性、月负荷特性、年负荷特性,发现空调负荷和大型工业负荷对株洲电网负荷特性的影响较大：空调负荷导致峰谷差加大,在峰谷电价的作用下,大型工业负荷起到了削峰填谷的作用。针对这2类负荷给系统运行带来的问题,提出了改善株洲电网负荷特性的建议。     

ECS创新产品开发中的知识共享问题探讨

随着当前以知识经济为基础的全球竞争变得更加激烈,许多跨国公司的供应商们越来越早地参与到创新产品的合作开发过程中。本文以一个欧洲的消费电器制造公司(ECS)为案例,调查和研究了在该公司新产品的开发过程中,供应链成员与其共享知识和相关技术的机制,并重点讨论了在此供应链中共享知识时所涉及到的主要问题以及未来的改进方向。