机组流水法预制1 067 mm轨距预应力钢绞线轨枕技术

以安哥拉罗安达铁路大修工程的实例,介绍机组流水法预制1067mm轨距有挡肩P.C轨枕的生产线设计与规模、施工工艺、施工方法及质量控制,首次解决预应力钢绞线轨枕的预制生产的技术难题,为同类轨枕的预制生产积累经验。     

机组流水法预制1067mm轨距预应力钢绞线轨枕技术

以安哥拉罗安达铁路大修工程的实例,介绍机组流水法预制1067mm轨距有挡肩P.C轨枕的生产线设计与规模、施工工艺、施工方法及质量控制,首次解决预应力钢绞线轨枕的预制生产的技术难题,为同类轨枕的预制生产积累经验。     

轨枕生产中易出现的质量问题及处理措施

介绍养马河工程有限公司在批量生产铁路轨枕中易出现的质量问题以及相应的处理措施,提高轨枕产品合格率。     

轨枕生产中易出现的质量问题及处理措施

介绍养马河工程有限公司在批量生产铁路轨枕中易出现的质量问题以及相应的处理措施,提高轨枕产品合格率.     

无砟轨道双块式轨枕色差成因分析

本文针对新建云桂铁路轨枕预制过程中轨枕混凝土出现色差问题,从混凝土养护方案、坍落度、水泥组分、养护方式及温湿度等多个方面着手阐述了导致双块式轨枕色差的成因。     

关于延长煤矿铁路混凝土轨枕服务年限的探讨

本文分析了煤矿铁路混凝土轨枕未能达到正常服务年限的原因，提出了延长服务年限的基本方法。     

高性能混凝土原材料的质量控制

论述了水泥、骨料、矿物质掺含物掺量、高效减水剂对高性能混凝土性能的影响,并说明了通过混凝土原材料的质量控制可确保高性能混凝土达到“高性能”的品质目标。     

混凝土粘结质量对其多轴强度影响的数值分析

以测试混凝土抗压强度的试件为数值分析的对象,考虑试件内部存在贯穿整个试件1-2mm厚的细砂、中砂或粗砂形成的薄弱层缺陷,使得骨料与胶凝材料粘结不充分,针对混凝土的二、三轴强度,进行数值模拟分析,分析结果表明：由于缺陷的存在,不只是降低了材料的强度,同时也改变了分析试件的应力状态.当胶凝砂砾石材料施工方法不当时,骨料与胶凝材料粘结不充分现象是较难避免的,不容忽视;通过试件粘结质量对混凝土影响的分析,提供研究胶凝砂砾石材料筑坝问题的一种思路.     

高速铁路无砟轨道自密实混凝土施工研究

板式无砟轨道是一种全新的铁路轨道结构形式,它不同于传统有砟轨道,无须轨枕、散粒体碎石道床等结构支撑.自密实混凝土是板式无砟轨道结构的关键工程材料,其灌注施工质量直接决定板式无砟轨道结构整体质量.结合郑济铁路河南段现场施工经验,探讨了自密实混凝土和配制要求,总结了高速铁路无砟轨道自密实混凝土施工要点,希望对同类工程施工有一定参考和借鉴.     

简述混凝土施工缺陷及防范

简要概述了混凝土施工缺陷的识别,从原材料因素、混凝土施工因素、自然因素和人为因素等几个方面分析了混凝土施工缺陷的主要形成原因,并有针对性的提出了一些防范措施,以便于从业人员参考,从而更好的提高混凝土工程施工质量,减少经济损失。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.