高速铁路通信信号设备接口雷电防护优化设计

提出了临界防护状态的概念,分析了临界防护状态使设备损坏的原因,提出高速铁路通信信号设备接口雷电防护优化设计方法,通过有效方法掌握被防护对象的耐冲击水平值和SPD各器件的耐受值,做到量化设计,保证防护的可靠性.     

交通工程中的防雷技术应用探讨

目前国内的交通工程中并没有很好地应用防雷技术，使得很多交通工程在遭受到雷电的干扰后不能尽快采取相应的应急措施．因此由雷电所带来的损失也不可小视。鉴于此，阐述将防雷技术应用到交通工程中的特殊性及其各类注意事项．以此促进防雷技术在交通工程中的推广和应用。     

公路环境保护监理的工作要点探讨

基于环境保护的重要性,阐述了公路工程环境保护监理在施工准备阶段、施工阶段、缺陷责任期阶段监理工作的要点,以及采取的主要措施.     

大学生网络生态文明的危机与构建

文章在阐述网络生态文明内涵的基础上，探讨了网络生态污染的种种表现及引起大学生文明失范现象，并从建设主流网站、加强污染院监控、培育监管队伍、加强宣传教育等方面提出了修复网络生态引导大学生文明成长的对策。     

Analysis of Coastal Wetland Changes Using the “DPSIR” Model: A Case Study in Xiamen,China

Over the past several decades, human activities have had significant impacts on coastal wetlands worldwide. Here, using a model of “Drivers-Pressures-State-Impacts-Responses (DPSIR)” and data collected from coastal wetlands in Xiamen, China, we have analyzed temporal changes in regional coastal wetland ecosystem structure and function from 1950 through 2005. The study period was divided into four parts for comparative analysis: pre-1980s, 1980s, 1990s, and 2000 to present. Our results show that anthropogenic drivers of coastal wetland degradation in this region have increased substantially since 1950, and that this is correlated with a decline in coastal wetland function over the same period.     

Privacy protection method for fine-grained urban traffic modeling using mobile sensors

With the ubiquitous nature of mobile sensing technologies, privacy issues are becoming increasingly important, and need to be carefully addressed. Data needs for transportation modeling and privacy protection should be deliberately balanced for different applications. This paper focuses on developing privacy mechanisms that would simultaneously satisfy privacy protection and data needs for fine-grained urban traffic modeling applications using mobile sensors. To accomplish this, a virtual trip lines (VTLs) zone-based system and related filtering approaches are developed. Traffic-knowledge-based adversary models are proposed and tested to evaluate the effectiveness of such a privacy protection system by making privacy attacks. The results show that in addition to ensuring an acceptable level of privacy, the released datasets from the privacy-enhancing system can also be applied to urban traffic modeling with satisfactory results. Albeit application-specific, such a “Privacy-by-Design” approach would hopefully shed some light on other transportation applications using mobile sensors.     

公路工程主体设计应考虑的环保措施

本文通过公路工程主体设计时对生态环境、水环境、声环境、空气环境以及社会环境等相关环保措施的系统阐述,初步对目前公路工程建设中主体设计时所采用的环保措施进行初步的探讨,为相关技术人员进行工程设计时提供相应的参考。     

一种环保沥青阻燃剂的研制

通过一系列的实验,研究开发了一种无毒环保类沥青阻燃剂,在基本不改变沥青性能的前提下,可以显著地改善沥青的阻燃性能。     

合理拱轴线确定方法探讨

从悬索结构与具有合理拱轴线的拱结构受力相似的角度出发，将悬索结构在荷栽作用下的线形沿水平面镜像后作为拱结构的压力线．以5次多项式拟合该压力线．从而确定出受力合理的拱轴线。     

土工格室植草护坡的稳定性分析

对土工格室的特点和抗滑稳定性的分析表明，在安全系数不小于1.5的条件下，土工格室是一种有效的边坡防护形式。土工格室护坡主要有平铺式护坡和叠砌式护坡两种形式。