堆、取料机行走减速过程中整机结构冲击过大原因分析及对策

对大型机械行走机构换档减速时,设备制动冲击晃动的原因进行了较详细的分析,并简要提出对策。     

High Frequency Characteristics of a Front Wheel Suspension

This paper presents a modeling method to analyze the frequency characteristics of a suspension system. The method employs the superelement and lumped methods for structural modeling of flexible bodies, and it is incorporated with a multibidy dynamics formulation in which joint nonlinearities can be considered effectively. To verify the accuracy of the results obtained by the modeling method, a quarter car test was made. Test results showed that the computational model provided fairly accurate frequency characteristics for the suspension system. Other useful conclusions were also drawn from this study.     

基于代理的城市交通信息网格服务系统

城市交通信息服务作为智能交通系统的重要组成部分，其发展大多处于分散重复的建设阶段。本文在分析了网格技术与代理技术各自的优势基础上，提出了基于代理的城市交通信息网格服务系统，并给出了结构模型。通过代理技术和网格技术的结合，整合现有资源提高城市交通信息的服务效率。     

Law enforcement in the ocean

The combating of the present great variety of criminal activities occurring at sea mainly involves measures to be taken on land, in particular in ports.However, also actual enforcement at sea will continue to play an essential (complementary) role. This article surveys the rules of international law governing law enforcement measures at sea. These rules are complex, because distinctions have to be made between the various jurisdictional zones at sea and between the positions of the flag state, the coastal state and the port state. Traditionally, ships in the high seas (all sea areas beyond a narrow band of territorial sea) were under the exclusive jurisdiction of the flag state. In an increasing number of situations, the coastal state now has law enforcement authority over foreign ships in expanded areas up to 200 nautical miles offshore. But apart from these situations, flag state jurisdiction still prevails beyond the territorial sea. This makes effective law enforcement difficult. In practice, many obstacles can be overcome by making more effective use of the authority of the port state, and by concluding new international agreements providing for specific enforcement systems.     

铁路粉尘作业场所36种粉尘粒度质量分布特性研究

报道了铁道部分粉尘作业３６种粉尘质量分散度的测定，以及按照ＢＭＲＣ与ＡＣＧＩＨ曲线标准所作的呼吸性粉尘与总份尘质量比的测定结果。按照ＢＭＲＣ曲线，呼吸性粉尘与总粉尘质量比，水泥生产粉尘１：１．４～１：７．３，采石场粉尘１：４．６～１：２０，铸造粉尘１：２．９～１：２０．４，隧道施工粉尘１：２．１～１：１０．０，其他粉尘１：５．４～１：２６．３。３６种粉尘呼吸性粉尘与总粉尘质量比最小为１：１．４的成品水泥尘，最大为１：２６．３的烘煤尘。本文尚对粉尘粒度谱精细测量的卫生意义作了初步探讨。     

跨座式单轨交通运输能力研究

针对跨座式单轨交通的特点，以正在修建的重庆跨座式单轨交通较场口至新山村线为背景，研究了列车最小运行间膈时间、线路通过能力、列车编组、列车载客量和运输能力等，并介绍了初步研究结果。     

基于氯离子分布的氯离子渗透参数计算的新方法

根据混凝土中氯离子的分布对氯离子侵入性能进行评价时,混凝土粉末样品的采集,氯离子含量的测试和表达方式,均可对评价结果产生影响。在干湿循环条件下,以理论上的表面氯离子浓度为主要评价参数对氯离子的渗透性能进行评价的方法不尽合理。通过对暴露26年后的青岛北海船厂码头中大量的混凝土芯样中氯离子分布的分析和计算,结合其它文献中氯离子分布的数据,提出了以扩散区与对流区界面为扩散表面,以界面处的氯离子浓度为扩散表面浓度,评价氯离子侵入性能和进行寿命预测的方法。     

单片机控制的电力机车用蓄电池容量校核系统的研制

针对蓄电池容量校核工作中存在的效率低下，精度不高等问题，提出了由单片机控制的电力机车用蓄电池容量校核系统，介绍该系统的主电路结构、控制电路原理和软件设计。该系统由恒流充电机、恒流放电机和蓄电池巡检电路等三部分组成，在80C196KB单片机控制下，系统按照规定程序，自动完成对蓄电池容量的检查工作。现场运行证明，该系统设计合理，功能完善，性能好，可靠性高。     

船舶上层建筑端部应力状态试验研究

本文针对某船舯部上层建筑端部在航行中出现裂纹这一现象，运用相似理论设计了大比尺钢结构模型进行试验研究，测试了四种端部结构型式在同一载荷作用下端壁下缘垂向应力和水平应力以及端壁附近甲板的应力分布规律，得出了一些有价值的结论。     

超氧自由基(O_2~■)水平在儿童急性肾小球肾炎及其治愈后的变化

以超氧化物歧化酶(SOD)作为分子探针测定了儿童急性肾小球肾炎(AGN)急性期红细胞内超氧阴离子自由基(O_2~?)含量及其治愈后的变化。结果表明,病儿与正常对照者的O_2~?水平有非常显著的差异;急性期与治愈后的差异也非常显著。提示超氧阴离子自由基在AGN发病中有重要作用。