Computer simulation shows that the criterion measure effectively locates faults in direct distribution line , and it is also feasible to tree - type distribution system in theory but there are still some problems in practice 经过数值仿真计算分析表明,该方法对直配线的接地故障定位是有效的,对树形多分支线路的故障定位理论上也是可行的,但实际应用中还有许多重要问题需要进一步深入研究。
Results : data showed that distribution of yang - deficiency type increasing , and yin - deficiency type decreasing along with the increasing of age ; valley of gentleness type distribution , and peak of blood - stasis type distribution appeared in female 25 ~ 34 group ; valley of gentleness type distribution , and peak of wet - heat type distribution appeared in male 35 ~ 44 group ; peak of qi - depression type distribution appeared in 25 ~ 34 group ; valley of female phlegm - wetness type distribution , and peak of male phlegm - wetness type distribution appeared in 25 - 34 group ; female qi - deficiency type distribution increasing along with the age 结果:无论男女,随着年龄的增加,阳虚质的分布逐渐增加,阴虚质的分布逐渐减少;女性在25 ~ 34岁组,平和质的分布出现峰值,瘀血质的分布出现峰值;男性在35 ~ 44岁组,平和质的分布出现谷值,湿热质的分布出现峰值;男女气郁质分布的峰值都出现在25 ~ 34岁组;女性痰湿质分布的谷值,男性痰湿质分布的峰值出现在25 ~ 34岁组;女性气成质的分布随着年龄的增长而增加。
According to hydrochemistry monitoring material of northwest rivers in recent five years , and compared with the first northwest rivers water resources investigation appraisal result in 80 ’ s of last century , we analyzed the main rivers hydrochemistry condition , runoff degree of mineralization , total hardness and the hydrochemistry type distribution 根据近5a来对西北诸河的水化学监测资料,统计出了主要河流水化学状况;分析了河川径流矿化度、总硬度和水化学类型的地区分布,并与20世纪80年代第一次西北诸河水资源调查评价的结果进行了比较。
In the next place , an improved algorithm of grounding fault location for tree - type distribution system which is based on new fault function and criterion measure , is proposed in order to complete fault branch ide ntification , fault location and fault value . a lot of the simulation of fault diagnosis and location by computer demonstrate that the algorithm is effective 其次论文基于辐射状馈线的任一分支线路发生接地故障,通过分析与推导,建构了配电线路单相短路点定位的故障定位函数和相应的故障判据,利用树网单端信息完成故障分支识别、故障定位和过渡电阻定值。
Abstract : in this article an optimization method is applied to de sign open - type distribution networks . graph theory technology is used . its mathem at ical model considers both the investment of constructing lines and the cost of o peration . the main idea is getting the structure of tree network that meets with the technical constraint conditions and at the same time make the annual cost mi nimum . the examples of simulation show that this method is fast and effective 文摘:将图论优化技术应用于配电网络的优化设计,提出了一种适合于开式配电网络规划的优化方法.所建的数学模型综合考虑了待建线路的投资和运行费用.求解方法是以图论中的最短路径问题为基础,配合以开式网络潮流算法,并通过可行路径的合理变换,得出满足技术约束条件且使年计算费用取极小值的树状网络结构