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基于时序动态视角的配电网规划技术评价研究 被引量:1
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作者 国方媛 《科技和产业》 2015年第9期106-108,129,共4页
针对配电网规划技术评价问题,选取供电可靠率、综合线损率、单位投资增供负荷、容载比、满足N-1主变比例、联络率、线路电缆化率、架空线路绝缘化率8个指标,应用基于时序动态视角的评价方法,即"五步法":指标筛选→指标类型一... 针对配电网规划技术评价问题,选取供电可靠率、综合线损率、单位投资增供负荷、容载比、满足N-1主变比例、联络率、线路电缆化率、架空线路绝缘化率8个指标,应用基于时序动态视角的评价方法,即"五步法":指标筛选→指标类型一致化→指标无量纲化→"纵横向"拉开档次法→TOWGA算子评价法,以吉林省3个地级市的配电网作为算例进行分析。这种方法没有丝毫主观色彩,适用于配电网规划技术动态评价,能够为供电企业同业对标提供参考。 展开更多
关键词 配电网 规划技术指标 动态评价 “纵横向”拉开档次法 TOWGA算子
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金昌有线电视网络升级改造及实现双向化的尝试 被引量:1
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作者 赵鹏德 《有线电视技术》 2010年第4期27-31,共5页
本文针对地级市数字电视整体转换时有线电视网信号质量差、网络陈旧和网络双向化等问题,介绍网改的设计方案、技术指标规划和双向化的实现方法。
关键词 网络升级改造 网改方案 技术指标规划 双向化
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Optimization of Portfolio of Stocks at ZSE through the Analysis of Historical Data
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作者 Robert Fabac Dusan Mundar 《Computer Technology and Application》 2011年第12期1007-1014,共8页
Decision-making of investors at the stock exchange can be based on the fundamental indicators of stocks, on the technical indicators, or can exist as a combination of these two methods. The paper gives emphasis to the... Decision-making of investors at the stock exchange can be based on the fundamental indicators of stocks, on the technical indicators, or can exist as a combination of these two methods. The paper gives emphasis to the domain of technical analysis. In the broader sense the technical analysis enables the dynamics of the expected future values of the shares estimation. This can be performed on the basis of the data on historical trends of the revenues, profits and other indicators from the balance sheet, but also on the basis of historical data on changes in the values of the shares. Companies generally belong to the different sectors that have different presumptions of development resulting from the global market trends, technology and other characteristic. Processing of historical data values of the outstanding shares of the Zagreb Stock Exchange (ZSE) is origination of this research. Investors are interested to know the estimation of future returns for the stocks as well as the size of the risk associated with the expected returns. Research task in this paper is finding the optimal portfolio at the ZSE based on the concept of dominant portfolio by Markowitz approach. The portfolio is created by solving non-linear programming problem using the common software tools. The results of obtained optimal portfolios contain relevant conclusions about the specifics of the shares as well as the characteristics of the industrial sectors but also provide a further knowledge about diverse sectors treatment at the stock exchange in a multi-year period. 展开更多
关键词 Historical data Markowitz portfolio selection economic sectors Zagreb stock exchange expected yield risk.
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