客运专线接触网工程技术经济分析

铁路客运专线接触网工程工艺与普速铁路工艺相差较大，笔结合客运专线概算编制的经验，对一些特殊的工艺进行了分析，希望对相关项目的概算编制工作具有借鉴作用。     

饮食诱发豚鼠胆结石及维生素C防止结石形成的实验研究

本实验采用高胆固醇及低蛋白两种致石食物诱发豚鼠形成胆结石,8周后成石率均为100%;在致石食物中加入维生素C,成石率分别降至16.7%和52.9%并通过对动物胆石的细微结构观察和成份分析,肝脏、胆囊的亚微及超微结构的变化以及胆汁结合胆汁酸量及其组成的观测,探讨饮食成份改变诱发豚鼠胆结石及维生素C防止胆石形成的机制。     

HEALTH SERVICE SYSTEMS IN CHINA＇S MINORITY AREAS：HEALTH POLICY DEVELOPMENT AND HEALTH STATUS

ＨＥＡＬＴＨＳＥＲＶＩＣＥＳＹＳＴＥＭＳＩＮＣＨＩＮＡ＇ＳＭＩＮＯＲＩＴＹＡＲＥＡＳ：ＨＥＡＬＴＨＰＯＬＩＣＹＤＥＶＥＬＯＰＭＥＮＴＡＮＤＨＥＡＬＴＨＳＴＡＴＵＳＲｅｎＨｕｉｍｉｎ;ＧａｏＪｉａｎｍｉｎ;ＺｈａｎｇＪｉｎｇ;（ＦａｃｕｌｔｙｏｆＨｅａｌ?..     

船舶仿人智能自动避碰控制系统

本文根据１９７２年国际海上避碰规则和自动控制理论，研究了船舶智能自动避碰控制系统的数学模型，给出了船舶仿人智能自动避碰的控制规则和计算机算法及其软件。系统的数字仿真表明：本系统的智能控制算法是可行的，系统的控制特性是良好的。     

闭环电码化在工程设计中的应用

介绍站内电码化的实施范围,闭环电码化的载频频谱排列,发送、检测设备的配置,发码及闭环检测原理,以及闭环电码化技术在工程设计中的应用和存在的问题。     

加筋土挡土墙的施工工艺

加筋土挡土墙具有受力的合理性 ,也具有其工艺的复杂性。文章从施工工艺控制的角度说明如何保证加筋土挡土墙路基复合结构的整体稳定性。     

车用永久磁铁缓速器的工作原理及使用

详细介绍了汽车用永久磁铁式缓速器的工作原理、使用方法，分析了三种不同类型永久磁铁式缓速器的结构，比较了三种结构类型的优点和各自的技术制约问题。     

正常年青人的诱发性耳声发射

在现有设备及条件的基础上,建立了一种高灵敏度的诱发性耳声发射(EOAE)测试系统,文中介绍了建立这一系统的具体方法及其测试条件。通过对15人30只听力正常耳的EOAE测试表明,短声和1kHz短音EOAE的检出率为100%,EOAE阈值与主观听阈密切相关,是一种比较理想的客观听力评价方法。该测试系统具有灵敏度高、信噪比大、抗干扰力强等优点,具有较强的实用性。     

37CrNi3钢过热后冷却方式对断口遗传的影响

本文结合金相组织,宏观断口和微观断口对37CrNi3钢经1300℃过热,并以不同方式冷却后,再经正常淬火消除过热粗大组织后出现的断口遗传现象进行了研究.结果表明,经过热后淬火,冷待淬火及空冷预处理所出现的断口遗传均属石状断口,其中经过热后直接淬火试样,断口遗传面积最小.     

Benzene concentrations on board chemical tankers

Maritime transport of benzene is regulated by the International Maritime Organisation (IMO). Two important guidelines for a ship’s crew in this matter are IMO circulars 1095 and 1220. The first one describes the minimum safety standards for ships carrying liquids in bulk containing benzene while circular 1220 deals with structural guidelines for new ships carrying liquids in bulk containing benzene, but also technical developments could help in improving safety and health protection on board chemical tankers carrying benzene in bulk. The aim of the present paper is to determine the benzene concentration in the working and living environment on board a modern chemical tanker carrying benzene in bulk, where all safety, technical and operational procedures described by IMO in the above-mentioned circulars are followed. During specific cargo operations, we measured the benzene concentrations on different locations on board by means of Radiello® passive diffusive samplers. Despite all measures taken, we found an important difference in benzene concentration between operations with a benzene cargo compared to operations without benzene on board, as well as inside and outside the accommodation. Moreover, even during discharge operations, where the emission is theoretically zero, we found an important increase in the benzene concentration. In addition, we found less favourable results for the engine room.