高压绝缘套管电场计算与绝缘分析

高压绝缘套管是气体绝缘金属封闭开关设备(GIS)高电压与地电位绝缘的重要元件,其均匀的电场分布与合理的结构,是GIS安全运行的保证。文章针对126 kV GIS高压绝缘套管结构设计与电场分布问题,在电磁场理论基础上,通过建立高压绝缘套管的轴对称电场数学模型,并对套管场域电场进行数值模拟及可视化处理,确定了126 kV GIS高压绝缘套管绝缘设计结构,为产品开发提供数值实验基础。经型式试验验证,产品各项性能指标满足技术规范要求,绝缘试验合格并具有较大的裕度,套管具有良好的技术经济指标。     

双回路高压供电线路并列经济运行分析

在架空输电线路总损耗的基础上,用数学极值方法推导出单回路和双回路架空输电线路经济负荷功率的计算公式,并推导双回路架空输电线路并列运行的临界投切功率的计算公式,举例说明了公式的应用。     

高压电流互感器的误差分析及运行维护注意事项

阐述了电流互感器的基本原理，分析了引起电流互感器误差的原因，并详述了高压电流互感器运行维护中需注意的事项。     

高压电流互感器的误差分析及运行维护注意事项

阐述了电流互感器的基本原理,分析了引起电流互感器误差的原因,并详述了高压电流互感器运行维护中需注意的事项。     

感知产品创新对冲动购买的作用机制研究

产品创新是否被消费者以冲动购买的方式接受是企业和学术界关心的重要议题。本研究以手机制造业为例,从技术创新的角度,采用多元统计的方法构建了消费者感知的产品创新与冲动购买意愿的关系模型,并引入了情感反应作为中介变量。研究结果表明:外观创新、操作创新与冲动购买意愿之间存在积极的正向关系;功能创新与冲动购买意愿之间存在负向关系;快乐情感在产品创新与冲动购买意愿之间起到显著中介作用,而唤起情感在二者关系中的中介效应不显著。     

关于一起110kV高压短路器合闸拒动事故的分析

为了研究某110kv变电站中旧式的110kV高压断路器合闸拒动事故的原因,分析了故障录波,开展了二次故障模拟,微机保护调试,蓄电池组维护等多项试验,最终得出此次事故的主要原因在于缺少对变电站蓄电池组进行日常维护,为了防止类似情况再次出现,总结出了一套较完善的蓄电池组维护方案,并该蓄电池组维护方案推广至公司所有的变电站,为整个电力公司电网安全运行多增加了一份保障。     

关于一起110kV高压短路器合闸拒动事故的分析

为了研究某110kv变电站中旧式的110kV高压断路器合闸拒动事故的原因,分析了故障录波,开展了二次故障模拟,微机保护调试,蓄电池组维护等多项试验,最终得出此次事故的主要原因在于缺少对变电站蓄电池组进行日常维护,为了防止类似情况再次出现,总结出了一套较完善的蓄电池组维护方案,并该蓄电池组维护方案推广至公司所有的变电站,为整个电力公司电网安全运行多增加了一份保障.     

Defining key drivers of online impulse purchasing: A perspective of both impulse shoppers and system users

With the proliferation of e-commerce, a large part of online shopping is attributed to impulse buying. Hence, there is a particular necessity to understand impulse buying in the online context. Impulse shoppers incline to feel unable to control their tendencies and behaviors from various stimuli. Specifically, online consumers are both the impulse shoppers and the system users of websites in the purchase process. Impulse shoppers concern individual traits and system users cover the attributes of online stores. Online impulse buying therefore entails two key drivers, technology use and trust belief, and the mediator of flow experience. Grounding on flow experience, technology-use features, and trust belief, this study proposes a novel research model to examine impulse buying behavior in a complete manner. Data were collected from an online survey. Data analysis considers structural equation modeling technique with formative structure. Empirical results showed that flow experience is an important factor to affect impulse buying from its original drivers. Trust belief is also critical to impulse buying as perceived usefulness is not. Implications for managers and scholars are further discussed.     

The compound cylinder and the strength problem

A general discussion is given of the effects of various strength theories on the design of compound cylinders composed of as many as four tubes. Departing from the usual practice in problems of this type, the more modern theories of strength are included.The problem considered is limited to simultaneous, yielding in all component tubes of the cylinder under the action of bore pressure. In addition, new short design procedures employing graphical means are discussed which will considerably reduce the time ordinarily required in such calculations. The methods used are flexible since component tubes of different materials following different strength theories can be treated as easily as cylinders composed of tubes of one material.     

变电站高低压母线备自投的配合方式

提出了三种实现变电站中高压母线备自投和中、低压母线备自投配合的方式。其一采用延时定值保证高压母线备自投先于低压母线备自投动作;其二采用开关量保证高压母线备自投动作过程中低压母线备自投不动作;其三在备自投全部动作过程中都对备供电源电压进行检查。     

移居高原成年人高强度运动前后心功能的超声研究

目的：研究移居高原缺氧环境下的成年人对高强度运动的耐受性及运动能力,为戍边官兵制定高强度训练计划、为地方支边建设大军的健康生存提供科学依据。方珐：在部队基层单位随机选择在西藏生存一年及五年的官兵各60名,男性、平均年龄24岁,选择同等环境、条件下进行5公里越野,每位受检者负重25公斤,必须在规定时间内跑完全程,完成后即刻进行心功能各项指标采集、同步录象。结果：对采集的39项心功能指标进行配对、T检验统计学处理,P值方法学对比分析,其中在藏生活五年与一年的受试者比较,前者有20项：具有非常显著性差异。结论：在缺氧这个始动因素作用下,首先导致心功能改变。