共查询到20条相似文献,搜索用时 78 毫秒
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介绍了2005年以来华东电网地区供、用电平衡方面的形势,2006年华东4省1市GDP增长和社会用电情况,华东电网发供电量及装机容量;并阐述了保证电网安全所需解决的3个问题。对2007年的电力需求作了预测,对供、用电的平衡态势作了预估。 相似文献
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随着我国国民经济迅速发展,华东电网用电结构也随之发生了变化,特别是近两年来,需求侧管理措施被广泛、深入地运用在华东电网,使部分类别的社会用电需求发生了重大变化。通过对目前华东电网各类用电结构数据的采集和统计,进行有针对性的分析,描述了华东电网各类用电结构及其特性,以期对今后电网内需求侧管理和负荷预测工作提供有益的参考。 相似文献
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阐述了华东电网近期的用电情况,由于近年产业结构的调整,气候的异常变化以及小水电、小火电对华东电网的影响,用电形势出现了新的变化,做好用电分析,可以为电力市场提供可靠的依据。 相似文献
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提高华东电网500 kV输电线路输电容量的研究 总被引:8,自引:1,他引:8
为解决 2 0 0 3年华东电网迎峰渡夏用电高峰实际情况 ,在现有输电线路的客观情况下 ,介绍了提高输电线路允许载流量计算值及提高允许载流电的两种方法 ,并对载流量后可能产生的 3个问题作了分析 ,最后经对华东电网有关 5 0 0 k V线路实际分析后 ,得出了将导线允许温度由 70℃升高到 80℃是可行的 相似文献
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1 华东电网用电概况1 999年华东电网全社会用电量为 2 2 76.5 8亿 k W· h,同比增长 7.46% ,较 1 998年同期的增幅提高了 4.1 1个百分点。 1 999年华东电网三省一市统调用电量为 1 95 5 .2 9亿 k W· h,比 1 998年同期增长 6.1 1 % ,较 1 998年同期的增幅提高了 4.2 3个百分点。经过近 3年的产业结构调整 ,在国家扩大内需、加大投资力度的有力带动下 ,经济运行步入良性发展的轨道 ,全年经济呈稳步增长的态势 ,并呈现出加快发展的良好势头 ;1 999年华东地区高温酷暑天气不多 ,夏季用电量的增长幅度较小 ,而冬季受寒流影响 ,气温突降 ,取暖… 相似文献
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《电气》2011,(2):14-18
With the incessant development of power market reform,the existing cross-subsidy in electricity tariffs has become a critical problem in China’s power industry development.On the basis of the theories of cross-subsidy and electricity universal service,the authors take foreign countries’ experience as reference to design several solutions to cross-subsidies in electricity tariffs in different phases of China’s power industry development.Furthermore,the application and implementation of these solutions are analyzed in this paper. 相似文献
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The author suggests that the confidence which many biologists have in problem-solving methods is unwarranted and that there are very important limitations in almost all current methods for solving biological problems. The standard problem solving approach that computer scientists use is outlined. An example of an error in an evolutionary tree problem-the case of the African Eve-is discussed 相似文献
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Recent progress in inverse problems in electrocardiology 总被引:5,自引:0,他引:5
The considerable progress achieved in the inverse problem of electrocardiography over the last decade has provided grounds for optimism about the possibility of approaching significant clinically relevant applications in the next decade. However, there are a number of basic questions that still remain. In addressing these questions, the authors feel it is important to seek solutions that emphasize physiological rather than mathematical significance. This approach leads to twin requirements for useful inverse solutions: accuracy, defined in a physiologically meaningful (and not just averaged and mathematical) sense, and reliability, not only to measurement noise but also to geometric modeling errors and other uncertainties that are inescapable in practical application. Studies using analytically tractable models may still be relevant, but it seems more important to find solutions to practical inverse problems, which will move the field toward wider acceptance and credibility 相似文献
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无色透明材料形成的单层薄膜,其颜色由干涉色决定。以白光照射其表面,随薄膜厚度的增加,将出现一系列色彩,这是由薄膜干涉所致。我们可以根据薄膜颜色,估计薄膜厚度。显然,当厚度增大到后界面的影响可以忽略不计的程度(相当于只有一个界面的半无限大情形,本文简称“厚膜”),则“厚膜”颜色恢复为无色透明。半透明材料在基底上形成的薄膜系统,以白光照射所呈现的颜色,由于基底及吸收的影响,则不能简单地以薄膜干涉来分析。对于半透明薄膜系统,首先测量它的光强反射率谱和透射率谱,运用传递矩阵[1]方法计算出薄膜的介质光学常数,再以光学常数计算单层薄膜与“厚膜”的光强透射率谱与反射率谱及它们的色坐标。以菲涅耳公式计算出的反射率谱为半无限大介质反射率谱,这时的色坐标可视为“厚膜”的色坐标。 相似文献
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A survey is provided of Japanese research on ceramic materials for substrates, microwave dielectric ceramics, piezoelectric ceramics, semiconducting ceramics, and superconducting ceramics. Novel processing technologies are described, covering the use of amorphous materials, superfine powders, lamination, multilayer thin films, porous ceramics, and superlattices 相似文献
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