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RESEARCH ON DEEP COAL SEAM MINING FLOOR STARTA WATER BURSTING INFLUENCED FACTORS BASED ON ANALYTIC HIERACHY PROCESS
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作者 SUN Ming ZHENG Wenxiang DUAN Xiaobo 《International Journal of Technology Management》 2014年第4期135-138,共4页
Deep coal seam mining floor strata water bursting is a complicate nonlinear system, whose factors are coupling and influencing themselves. It built the analytic structure model for deep coal seam mining floor strata w... Deep coal seam mining floor strata water bursting is a complicate nonlinear system, whose factors are coupling and influencing themselves. It built the analytic structure model for deep coal seam mining floor strata water bursting, the judgment matrix was found by the expert scoring method, the contribution weights of the influenced factors were given out by the equation analytic process. The thirteen controlling factors and five main controlling factors were put award by analyzing weights, so the result was basically conform to the field practice. The expert scoring method and analytic process can convert the objective fact to the subjective cognition, so it is a method that can turn the qualitative into the quantitative. This can be relative objectively and precisely to study the question of many factors and grey box. 展开更多
关键词 deep coal seam mining floor strata water bursting expert scoring method equation analytic hierachy process controllingfactors main controlling factors
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电力系统中基于SDH的时间同步系统研究 被引量:9
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作者 陈宁 李洪涛 俞刚 《科学技术与工程》 2011年第16期3672-3674,3678,共4页
针对电力系统中的时间同步问题,提出一种基于SDH的时间同步系统设计方案。通过对比目前常用的时间同步系统方案,选择电力系统中最成熟的SDH网络作为时间同步系统的媒介,提出一种时隙校准时间同步算法(TSA),并给出具体的设计方案。该算法... 针对电力系统中的时间同步问题,提出一种基于SDH的时间同步系统设计方案。通过对比目前常用的时间同步系统方案,选择电力系统中最成熟的SDH网络作为时间同步系统的媒介,提出一种时隙校准时间同步算法(TSA),并给出具体的设计方案。该算法中,主从设备在SDH的E1某个时隙bit位发送时间信息,并记录传输延时,从设备利用主设备提供的延时信息得到通道延时差,然后利用延时差校准从设备的时间,实现时间精确同步。通过理论分析,该算法可以达到ns级的时间同步精度。 展开更多
关键词 时间同步 同步数字体系(Synchronous DIGITAL hierachy SDH) 电力系统
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Applying Hierarchy Model to Routing and Scheduling Operations in Postal Logistics 被引量:1
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作者 HUXiang-dong WANGPing 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2001年第4期24-28,共5页
Postal departments are actively taking part in e commerce, of which logistics is a key joint. Computerized routing and scheduling of postal transportation operations offers significant potential for cost decreases an... Postal departments are actively taking part in e commerce, of which logistics is a key joint. Computerized routing and scheduling of postal transportation operations offers significant potential for cost decreases and productivity gains. Routing and scheduling hierarchy model is initially built and demonstrated in detail on the basis of statements of specific requirements of postal logistics in this paper, and the realized software is proved to be practical and reliable. 展开更多
关键词 postal logistics routing and scheduling algorithm hierachy model multiobjective decision making
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