SS5型客运电力机车(7)——TZZ6型制动电组装置和TDZ1A-250/25A型空气断路器

文章介绍了SS 5机车的TZZ 6型制动电阻装置和TDZ 1A-250/25 A型空气断路器的技术参数、结构特点,以及该型断路器的开断容量试验结果。     

关于重载铁路货车缓冲器技术的研究

通过对国内外重载货车缓冲器的发展趋势和存在问题的分析,结合大秦线重载列车运输试验结果的研究,对我国重载货车缓冲器的主要性能参数的选取、试验及评定方法提出了建议。     

Spatial distribution of cadmium over a cyclonic eddy in the southern East China Sea

Eddy systems are a unique ecosystem, usually having high biological masses and primary production in the sea. In this study, both particulate and dissolved phases of cadmium in the water column of 15 stations over a cyclonic eddy in the southern East China Sea were determined to obtain their spatial distributions. This allows us to confirm that cyclonic eddy systems play the role of a Cd pump in the sea.Results showed that particulate Cd (PCd) and dissolved Cd (DCd) concentrations in water varied greatly, ranging over two orders and one order of magnitude, respectively. Large spatial variability was found not only for PCd but also for DCd in the upper water, apparently due to the effects of the cyclonic eddy system on the Cd distributions over the study area. DCd accounts for about 99% of the total Cd. For the surface water, DCd concentration at the eddy center was about five times the average of the water surrounding the eddy center. The depth distributions of DCd exhibited a typical surface depletion and a subsequent increase with depth; however, the PCd distribution showed the opposite, i.e. a surface maximum and a subsequent decline with depth. In general, the DCd maxima were found at depths of 600–1000 m, agreeing well with the literature. It reflected the internal biogeochemical cycling of Cd in the water column, which was driven by the utilization of Cd by plankton in the euphotic zone and by the regeneration of Cd at depth. In addition, a remarkably high DCd concentration existed in near-bottom water around the cyclonic eddy center.The horizontal distributions of both PCd and DCd in the upper water shared a common feature with elevated concentrations centering around the eddy center and a decline in concentration with distance from the eddy center. This shows that the cyclonic eddy could bring up the Cd-rich deep water to the surface water around the eddy center and could then expand toward eddy's vicinity via advection–diffusion. It is thus likely that it produces ample biological masses over the eddy system. Hence, this work can demonstrate that the ascending nutrient-rich water driven by the cyclonic eddies can serve as an important source not only for many nutrients but also for Cd in the sea.     

菜油、精炼油及抽油烟机回收油中苯并芘的污染

采用纸层析、紫外分光光度法测定菜油、精炼油及抽油烟机回收油中苯并芘（３，４－ｂｅｎｚａｐｙｒｅｎｅ，ＢａＰ）含量。结果显示：菜油中含有痕量ＢａＰ，精炼油中未检出ＢａＰ，抽油烟机回收油中ＢａＰ含量明显升高。     

上海与舟山市建立联合港区的设想

为了适应改革开放的新形势,上海港正在积极兴建新的万吨级泊位,同时对老码头进行技术改造,建立新作业区,鼓励货主自建专用码头和筹建新港区等。但作者认为,由于受长江口航道的水深限制,上海港难以成为西太平洋的枢纽大港。为了充分发挥上海市的优势,又弥补自然条件的不足,作者建议上海与拥有自然深水区域的毗邻舟山市开展横向合作,在舟山岛西南的野鸭山水域建立联合港区,建议由上海的电力企业、海运局、港务局和舟山市建立煤炭联运集团,由上海的钢铁企业、远洋运输公司、港务局、梅山钢铁公司和舟山市建立钢铁矿石联运集团。     

双体水翼船模型试验研究

介绍了由作者设计的双体水翼船和船模试验研究情况。试验中，对船模的一些主要要素进行了变化，得出了它们对船模和影响的一些规律。     

汽车接近角,离去角和纵向通过角的测量

介绍了日本汽车标准化协会（JASO）对汽车接近角、离去角和纵向通过角的定义。按照该定义，可以用简单的测量工具测得若干个长度尺寸，然后代入按几何关系推导出的公式中求得上述三个角度的精确值，既提高了测量精度，又便于各车型之间这些参数的比较。     

抓斗吊车自动称重系统及其微机模拟调试

本文阐述了吊车自动称重系统的硬件原理及其有关的接口技术,提出了一种简便可行的称重计量方法和相应的软件设计方法,并说叫了微机模拟技术在调试中的作用和过程。     

车辆实时调度中的城市路网及交通描述模型

为满足车辆实时调度对城市路网交通信息的需求,本文应用GIS节点弧段拓扑数据模型对具有交通管制信息及实时、动态交通流信息的城市路网进行描述。完整地表达了路网的连通性及交叉口的转向管制信息,并通过实时更新路权来体现路网交通状况的变化,依此路权可以进行动态最短路径计算,为车辆调度提供了可视化平台。本模型应用地理信息系统和数据库管理系统分别存储路网空间数据和属性数据,保证了模型的运行效率。     

基于B/S的起重船舶实时监测系统的研究

分析基于B/S结构对船舶进行实时监测的应用技术,通过对C/S与B/S模式原理及优缺点的比较,提出了采用B/S结构,克服了传统C/S模式在实时监测系统中的不足,在具体运用工具方面,项目中选用了ASP ADO的技术,实现数据库的访问功能,并设计了公司端服务器软件的相应用户使用流程.