Through the measurement, the noises characteristics of general electric devices are analyzed, the statistical expressions of the background noises are given, and the attenuation characteristics of electricity meter, air switch and indoor power line networks are given too. 通过测试分析了常用家用电器设备的噪声特性,给出了电力线背景噪声的统计表达公式,给出了电表、配电开关及家庭电力线网络的高频衰减特性。
The practical application of traffic statistical functions of C& C08 switch system are introduced. It is shown that traffic statistical analysis is important in network operation, maintenance and marketing. 介绍C&C08交换系统话务统计功能的实际应用和应用方法,说明话务统计分析在网络运行及市场营销中的重要性。
This article indicates the sample selection problem in this study through theoretical analysis and descriptive statistical analysis of the data. The standardized Heckman model, Switch model and treatment effect estimation method are employed to correct the sample selection bias, respectively. 通过理论分析和数据的描述性统计分析指出了该研究中存在的样本选择问题,并使用本文介绍的标准的Heckman选择模型、Switch模型和处理效应估计法来纠正这个样本选择性偏差。
For the basic data statistical methods of distribution network, a formula deriving the maintenance data was put forward, which transforms maintenance events of switch and circuit breaker into maintenance events of overhead lines and cable. 针对配电网可实际运行情况,特别是可靠性基础数据统计方法,推导出检修数据转化公式,将开关和断路器的检修事件转化为架空线和电缆检修事件,对原始数据进行了处理。