基于KEIL及PROTEUS的继电控制系统功能仿真与检测

继电器接触器的工作时间不尽相同,很有可能会引发竞争冒险现象,导致控制线路不能正常工作,由此介绍了一种实用的继电控制线路功能仿真与检测方法。用KEIL及PROTEUS软件建立了继电器模型,提出了继电器动作时四个不同的延时时间。根据一个现场实例建立了继电控制线路模型,提出了接近实际线路工作状况的算法。进行了功能仿真,证明利用所建立的模型可以仿真控制线路功能并检测到竞争冒险现象。该方法简单,效果明显直观,可用于基于继电器动作的电气控制回路动作性能分析。     

中国推进售电侧市场化的制度设计与建议

回顾了中国电力体制改革的历史进程,剖析了当前形势下中国推进售电侧改革的困难所在,研究了售电侧改革在电力体制改革中的定位,揭示了售电侧改革对形成市场化交易机制、促进分布式能源发展和开展需求响应的重要意义。在此基础上,提出了中国稳步推进售电侧改革的制度设计与建议,其中包括采用管制化与市场化相结合的方式培育售电主体、采用互联网手段加强用户侧的培育、分类建立差异化的售电主体准入机制、采用市场机制激励售电商提供多样化的增值服务、建立公益性售电商应对托管状态下的用电需求、建立公平透明的售电监管和信息披露制度等。     

理论知识在技能大赛人才培养模式中的渗透实践

针对目前职业院校为了在技能大赛中取得优异的成绩更注重技能的培训,而忽略了实际操作赖以支撑的理论知识的学习,陷入"技能教育"误区,笔者结合多年技能大赛培训经验,通过将理论知识以"必需和够用"为原则渗透到技能培训中,使选手的技术和能力得到同步提升,是培养出具有一定专业理论知识的高素质技能型专门人才的有效途径。     

浅谈建筑的微气候调节——全国首届绿色建筑设计竞赛获奖作品主要技术解析

微气候是指人们日常生活的室内小环境,常规情况下主要依靠设备(如空调、暖气片、空气净化器等)来调节,这是一种以牺牲能耗为代价的调节方式。但在可持续发展的大背景下应考虑更节能环保的方式来达到调节的目的。本文以首届全国绿色建筑竞赛获奖作品——向日葵?竹构——为例,介绍了在夏热冬冷地区的中小型建筑中如何采用被动式节能技术来实现建筑的微气候调节,进而倡导建筑设计人员在创作过程中应当着力体现可持续性价值观。     

Selective attention and distractor frequency in naming performance: Comment on Dhooge and Hartsuiker (2010).

E. Dhooge and R. J. Hartsuiker (2010) reported experiments showing that picture naming takes longer with low- than high-frequency distractor words, replicating M. Miozzo and A. Caramazza (2003). In addition, they showed that this distractor-frequency effect disappears when distractors are masked or preexposed. These findings were taken to refute models like WEAVER++ (A. Roelofs, 2003) in which words are selected by competition. However, Dhooge and Hartsuiker do not take into account that according to this model, picture-word interference taps not only into word production but also into attentional processes. Here, the authors indicate that WEAVER++ contains an attentional mechanism that accounts for the distractor-frequency effect (A. Roelofs, 2005). Moreover, the authors demonstrate that the model accounts for the influence of masking and preexposure, and does so in a simpler way than the response exclusion through self-monitoring account advanced by Dhooge and Hartsuiker. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

City make‐overs: The place marketing of melbourne during the kennett years, 1992–99

Abstract

Over the past two decades, the emergence of a new global economic order has triggered an intensification of competition between cities for footloose investment capital and tourism. Some have proven to be more successful than others at this form of civic boosterism through the adoption of place promotion and place marketing. Unfortunately, most research on this contemporary urban phenomenon has focused on Northern Europe and the United States, not Australia. To redress this imbalance, this paper examines why intercity competition has intensified, outlining the main features of place promotion and marketing and then examining how the Kennett Coalition government place‐marketed Melbourne and Victoria within the Asia‐Pacific Rim region. It attempts to assess whether the place marketing campaign succeeded and highlights a number of limitations with this mode of urban analysis.     

Generation companies decision-making modeling by linear control theory

This paper proposes four decision-making procedures to be employed by electric generating companies as part of their bidding strategies when competing in an ologopolistic market: naïve, forward, adaptive, and moving average expectations. Decision-making is formulated in a dynamic framework by using linear control theory. The results reveal that interactions among all GENCOs affect market dynamics. Several numerical examples are reported, and conclusions are presented.