防止国内航行船舶封闭处所安全事故的思考

该文分析了国内航行船舶进入封闭处所安全管理的现状和存在的问题,从制度制定、航运公司安全管理、船员训练操作、海事安全监管等角度进行归纳分析,提出了制定完善国内船舶进入封闭处所法规规范、加强对国内航行船舶实施进入封闭处所安全管理的相关建议,希冀对改进国内船舶安全管理水平、减少因进入封闭处所操作导致的伤亡事故具有一定指导意义。     

LBQ—1000型强制式沥青拌和机自动控制系统设计

介绍了以可编程序控制器的核心构成的LBQ－1000型强制式沥青拌和机自动控制系统的硬件配置、软件设计、触摸屏人机界面设计等情况，并给出了软件流程图。     

汽车交通事故技术鉴定:21世纪的知识型新职业

分析道路交通事故的发展，提出汽车交通事故技术鉴定在中国出现的可能性和必然性。介绍国外汽车交通事故技术鉴定作为一咎职业的概况，概括地分析了汽车交通事故鉴定业务需要的基础知识结构和专业知识结构，构筑了汽车交通事故鉴定职业物粗略框架     

参数自整定PID模糊控制器的设计及Simulink仿真

在传统PID控制器基础上,参数自整定PID模糊控制器应用模糊集合理论建立参数与偏差绝对值和偏差变化绝对值间的二元连续函数关系,并根据不同的偏差及其变化在线自整定PID参数。介绍了具有自整定参数功能的一类PID控制器的设计方法及在轿车行驶仿真中的应用。     

凯斯M2系列挖掘装载机技术特点分析

0前言 M2系列是凯斯公司全新推出的采用TierⅡ发动机和可选配先导液压控制的系列挖掘装载机。凯斯公司作为世界上第一台真正意义上的挖掘装载机的发明者，在开发挖掘装载机方面已有近150年的历史。M2系列挖掘装载机作为凯斯公司的最新产品包含了许多世界挖掘装载机设计和制造技术的潮流和方向。     

隧道常用火灾探测器原理及性能分析

文章介绍了火灾探测器的几种类型、工作原理及性能,并对其各自的经济技术指标进行了分析和对比.     

Do China Mainland and SARs Constitute an Optimal Currency Area?Evidence from Nonlinearity and Stationarity Behavior Testing on Real Exchange Rates

In this article, we use the unrestricted two-regime autoregressive threshold model to test both nonlinearity and stationarity of China’s real exchange rate against its Hong Kong and Macau special administrative regions (SARs). Our main finding is that China’s real exchange rate is neither linear nor stationary, indicating that the purchasing power parity does not hold between China Mainland and its two SARs, which implies, to certain extent, the three economies may not meet the condition of constituting an optimal currency area.     

Seasonal variability of dissolved major and trace elements in the Gaoping (Kaoping) River Estuary, Southwestern Taiwan

To gain a better understanding of the geochemical behavior of trace elements in estuary and to examine seasonal variations in associated chemical fluxes, more than 50 water samples were collected near the mouth of the Gaoping (formerly spelled Kaoping) River, a major river in southwestern Taiwan. These samples, collected in typical dry and wet tropical monsoon seasons during 1999–2004, were analyzed for dissolved major and trace elements and Sr isotopes. Our results show that dissolved Na, Mg, Ca and Cl behave conservatively along the salinity gradient and display significantly larger fluxes in the wet seasons. Vertical profiles of the major elements reveal mainly two end-member mixing between the riverine freshwater and the seawater. Trace elements of B, Sr and U also display conservative distribution in the vertical profiles. In contrast, dissolved Ba and Mn were affected by uptake/release processes involving groundwater, benthic flux and water/sediment interactions. ⁸⁷Sr/⁸⁶Sr ratios also support a scenario of mixing between a more radiogenic continental source and the seawater. It appears that the wet season samples have higher trace element concentrations due to inputs from topsoils and atmospheric dusts. This implies that chemical compositions in river waters respond sensitively to regional climatic changes. The observed high fluxes of B and Sr in the Gaoping (Kaoping) River emphasize the potential impact of mountainous rivers on the global oceanic mass balance of these constituents.     

导电胶综合性能影响因素研究

本文综述导电胶的种类、组成及应用.从导电填料粒子与树脂的界面相容性、导电胶接触电阻稳定性、耐碰撞冲击性能研究、电迁移等方面,对导电胶的导电性能、机械性能的影响因素及其作用机理进行阐述.了解影响导电胶综合性能的综合因素,对高品质导电胶片状银粉的开发提供理论指导.     

某地铁隧道盾构机始发阶段地面塌陷原因分析

某地铁隧道在盾构机始发后的半个月内连续发生了三次地面塌陷.基于工程地质条件,结合地面监测资料和盾构机掘进时的运行状况,文章对这三次地面塌陷发生的原因进行了分析,并总结提出了盾构机始发过程中在各个方面应该注意的问题,以避免类似问题的发生.另外,文章也探讨了盾构法隧道施工工程地质问题与传统隧道施工工程地质问题发生机制的不同之处.