变压器套管检修与维护

通过对变压器套管发生故障的原因的分析，制定出减少套管故障的相应措施，从而获得变压器套管最佳的检修维护方式和处理此类故障的正确方法，对电力系统的稳定运行有较大的实用价值。     

Study on the failure mechanism of Ag-Ce contacts in DC level

Nominal contact resistance, minimum erosion and material transfer are required with low cost materials working in a wide currents range for DC relays. Ag-Ni contact materials have low contact resistance, but the erosion and material transfer are large at high current level. Ag-SnO2 contact materials have good anti-welding properties and resistance to arc erosion, but they have large contact resistance during working and are easily block SnO2 from flocking together on the surface at low current level. In this paper, the failure mechanisms of Ag-Ce contact material were studied. The surface morphologies of the contacts after electrical endurance test for Ag-Ce contact material were compared with that of Ag-Ni and Ag-SnO2 contact materials. The effect of Ce on the surface morphologies of the contacts after electrical endurance test was analyzed.     

斜晖脉脉水悠悠——小李杜关系考辨

在晚唐诗人中，杜牧与李商隐无疑是翘楚人物，通常被并称为“小李杜”。他们两人是否也如李杜一般有着深厚的堪称文坛佳话的友谊，还是一个尚待研究的问题。前人偶有提及，几乎是众口一词，都从李商隐的赠诗得出基本相同的结论。以其中比较有代表性的刘学锴先生在《李商隐传论》里的观点为参照，结合杜牧的生平及大中三年的时代背景，可以见出横亘在小李杜之间的一些心理隔膜。     

Testing results analysis of contact materials＇ electrical contact performance

Because of the different ways in which contact materials work, the basic requirements for silver metal oxide contact materials are different. They are anti-welded and anti-erosion when closed, anti-erosion when broken, and arc easily moved and have smaller contact resistance. In this paper, La2O3 is used as a stable oxide in contact material to replace CdO. A new type of Ag/SnO2-La2O3-Bi2O3 contact material is first obtained through using powder metallurgical method. Then electrical contact material parameter tester is used to test the electrical contact performance of the contact material. Through experiments, the arcing voltage and current curves, arcing energy curves, fusion power curves while broken and contact resistance while closed were obtained. Analysis of the results showed that the addition of La2O3 makes the contact material have the following advantages： smaller electrical wear, smaller arc energy, smaller contact resistance and arc is more easily extinguished.     

圆钢矫直机轧辊曲面的设计

以轧辊曲面为研究对象,分别运用图解法和解析法求解轧辊曲面的接触线和曲面轮廓线,并可用计算机计算出结果或输出图形,以满足实际生产需要.     

Gardnerella vaginalis infection and sexual contact in female children

Gardnerella vaginalis (GV) infection has been reported as being acquired via sexual contact in adults and as an indicator of sexual contact in female children (DeJong, 1985). The purpose of this study was to determine if GV infection was more commonly found in 191 female children who gave a history of sexual contact and/or were infected with Neisseria gonorrhoeae (GC) or Chlamydia trachomatis (CT) (Group 1), compared with 144 female children evaluated for possible sexual abuse and found to have no such history or infection with GC or CT (Group 2), or 31 female children (friends of the authors) without such a history or GC or CT infection (Group 3). Vaginal GV was found in 5.3% of Group 1, 4.9% of Group 2 and 6.4% of Group 3 (p > .05). Also, vaginal GV infection was not related to the type of sexual contact or race, but did increase with age in white female children. Because vaginal GV infection is not more commonly found in children with a history of sexual contact than those without such a history, the finding of GV in a vaginal culture in an individual case would not be a reliable marker of sexual contact. Routine culturing for GV is not recommended as part of a sexual abuse workup.     

四元数空间形式中混合型全拟脐QR-子流形

考查四元数空间形式中混合型全拟脐QR-子流形并研究了四元数空间形式中具有某种条件下的混合型伪脐QR-子流形.进而研究了四元数K(a)ehler流形的QR-子流形,给出了一些有趣的结果.     

Integrating Northern Ireland: Cross‐group friendships in integrated and mixed schools

While Northern Ireland strives to build a shared society, the current reality is that everyday experiences are still shaped by division along ethno‐religious lines. This is particularly pronounced in the education system, where more than 92% of pupils attend separate schools. Within the predominantly separate education system, however, exists a small collection of schools which cater to a more heterogeneous pupil body and offer the opportunity for young people from both communities to meet and interact, and potentially develop cross‐group friendships. The present study compares the network‐based cross‐group friendships within two such school types; an integrated and a separate post‐primary school. These schools boast a distinct ethos yet they similarly enrol students from Catholic and Protestant backgrounds. Findings reveal that both schools show a high level of interconnection between pupils; however, the integrated school, with an ethos that openly supports social cohesion, shows a greater tendency towards cross‐group interactions and best friendships than those found within the separate school. In line with contact theory, these findings suggest that it may not be enough to simply create opportunities for intergroup contact but that optimal conditions, such as institutional support, may be a prerequisite for positive relationships to flourish. Implications for educational policies designed to promote greater cross‐community contact are discussed.     

社会交往的精神生产力意义

长期以来,学术界往往把人与人之间的社会交往仅仅归之于生产关系,而很少有人重视其生产力功能。实际上,交往作为一种社会实践活动不论从物质层面还是从精神层面上说都具有生产力功能。文章运用马克思主义的社会交往理论,主要从精神交往这个层面上就社会交往在语言传播、文明成果延续共享、促进人类社会发展等方面论述了社会交往的精神生产力功能,并从若干方面加以具体展开;进而突出了现代社会交往所具有的空前重要的生产力意义。     

青海多元文化交融下的语言接触现象

青海地区多民族聚居，族群的互动促进了语言的接触和交融，使这一地区的各种语言呈现出不同于本来系属语言的特点。本文从青海境内各语言在语音、词汇、语法方面的接触入手，分析论述了青海地区多元文化交融下语言接触后产生的复杂现象。