漏电保护器的选型及其应用

介绍了漏电保护器的原理，在低压配电系统中漏电保护器的选择及安装中的注意事项、检验项目、常用电器设备漏电电流的计算等。设备在加装漏电保护器后，预防了电气火灾及人身电击事故的发生，提高了配电系统运行的可靠性。     

电气漏电保护开关在接地系统中的应用

本文着重分析在TT、TN接地系统中装设漏电保护装置,以有助于对规范的进一步理解,使广大用户重视漏电保护开关的作用,防止电击伤害事故发生.     

浅谈漏电保护器在实践中的应用

漏电保护器是一种安全保护设备，它在保护人民生命和财产方面起着重要作用。它的使用环境、它的选用标准、它的安装规则、它的故障排除等等都有科学规定，不论在工业、农业、医疗还民用建筑、家用电器方面都有广泛的应用。     

对攀钢民用住宅漏电保护设计的探讨

对攀钢目前民用住宅漏电断路器的设置进行了介绍，并提出了既满足防电气火灾、防人身电击要求，又能兼顾供电可靠性的住宅供电系统。     

金属矿山低压漏电保护及应用

低压漏电保护在金属矿山的使用越来越普遍。分析了中性点接地和中性点不接地2种接地方式的漏电特点、区别及其漏电保护原理,提出金属矿山低压漏电保护使用中存在的问题和产生的原因,介绍了适用于金属矿山漏电保护的JD低压漏电保护系统。工程实践表明:JD低压漏电保护系统能够使变电所出线和设备终端实现分级选择性漏电保护。     

漏电保护器应用简析

根据国内某品牌与国外某品牌三极、四极漏电保护器资料，重点分析了三极、四极漏电保护器的结构、工作原理及应用。     

电气设计中漏电保护器的合理选择

从设计的角度介绍了漏电保护器的分类,并对不同类型漏电保护器的性能作了详细的比较,从而为设计工作中漏电保护器的选型提供了依据.     

Molecular mechanics of calcium-myristoyl switches

Many eukaryotic cellular and viral proteins have a covalently attached myristoyl group at the amino terminus. One such protein is recoverin, a calcium sensor in retinal rod cells, which controls the lifetime of photoexcited rhodopsin by inhibiting rhodopsin kinase. Recoverin has a relative molecular mass of 23,000 (M[r] 23K), and contains an amino-terminal myristoyl group (or related acyl group) and four EF hands. The binding of two Ca2+ ions to recoverin leads to its translocation from the cytosol to the disc membrane. In the Ca2+-free state, the myristoyl group is sequestered in a deep hydrophobic box, where it is clamped by multiple residues contributed by three of the EF hands. We have used nuclear magnetic resonance to show that Ca2+ induces the unclamping and extrusion of the myristoyl group, enabling it to interact with a lipid bilayer membrane. The transition is also accompanied by a 45-degree rotation of the amino-terminal domain relative to the carboxy-terminal domain, and many hydrophobic residues are exposed. The conservation of the myristoyl binding site and two swivels in recoverin homologues from yeast to humans indicates that calcium-myristoyl switches are ancient devices for controlling calcium-sensitive processes.     

Subassembly generation via mechanical conformational switches

A question is posed on how a particular subassembly sequence is generated in randomized assembly. An extended design of mechanical conformational switches [16] is proposed that can encode several subassembly sequences. A particular subassembly sequence is generated due to conformational changes of parts during one-dimensional randomized assembly. The optimal subassembly sequence that maximizes the yield of a desired assembly can be found via genetic search over a space of parameterized conformational switch designs, rather than a space of subassembly sequences. The resulting switch design encodes the optimal subassembly sequence so that the desired assemblies are put together only in the optimal sequence. The results of genetic search and rate equation analyses reveal that the optimal subassembly sequence depends on the initial concentration of parts and the defect probabilities during randomized assembly. The results indicate that abundant parts and parts with high defect probabilities should be assembled earlier rather than later.     

探究储水池渗漏的防治及堵漏方法

本文通过对储水池发生渗漏的各种情况的阐述，有针对性的分析了项目施工过程中渗漏的防治及堵漏方法，并说明了在施工过程中防堵不成功的情况下的处理及原则。     

液压系统漏油的防治

本介绍了液压系统的漏油现象，泄漏的原因与防治措施。