海船闸气幕防咸设计

为指导船闸气幕防咸设计,本文将经典Abraham方法和Keetels数据进行比较.结果发现,Abraham方法偏保守.基于Keetels数据,本文提出一种新的半经验公式,以获得更准确的供气量.     

龙溪隧道左线试验段围岩大变形成因机制分析

在我国西部山区修建高速公路过程中常选择隧道方案,从而各类特长深埋、复杂地质条件下的隧道工程大量涌现,在施工过程中常出现各种隧道灾害.针对在建的都(江堰)-汶(川)公路龙溪隧道丁程中频繁出现的围岩大变形而导致初期支护侵限现象,基于现场测试资料.采用地质分析法和连续介质力学分析法,准确的获取了左线试验段围岩大变形的主要成因:倾向隧道右侧的软岩地层在高地应力(作用方向近垂直岩层)作用下产生较大变形.     

百里海区重现湛蓝——辽宁海事局“7·16”事故海上清污工作纪实

<正>7月16日18时08分,一声剧烈的爆炸声,划破了海滨大连傍晚的宁静。大连新港原油罐区火光冲天,浓烟弥漫……消防官兵组织全力灭火。18时30分,辽宁省海上搜救中心接到事故报警,爆炸使部分原油沿管线流入     

Pressure-Based Approach to Estimating the Injection Start and End in Single and Split Common Rail Injection Processes

The deep understanding on sand and sand dunes scale can be useful to reveal the formation mechanism of the sandstorm for early sandstorm forecast. The current sandstorm observation methods are mainly based on conventional meteorological station and satellites remote sensing, which are difficult to acquire sand scale information. A wireless sensing network is implemented in the hinterland of desert, which includes ad hoc network, sensor, global positioning system (GPS) and system integration technology. The wireless network is a three-layer architecture and daisy chain topology network, which consists of control station, master robots and slave robots. Every three robots including one master robot and its two slave robots forms an ad hoc network. Master robots directly communicate with radio base station. Information will be sent to remote information center. Data sensing system including different kinds of sensors and desert robots is developed. A desert robot is designed and implemented as unmanned probing movable nodes and sensors’ carrier. A new optical fiber sensor is exploited to measure vibration of sand in particular. The whole system, which is delivered to the testing field in hinterland of desert (25 km far from base station), has been proved efficient for data acquisition.     

以规范的管理方式和创新的工作思路建立海上搜救应急管理体系

“以最快捷的方式获取最准确的信息情报，以最科学的决策制定最完善的施救方案，以最有效的手段配备最精干的搜救力量，以最满意的社会效果回馈最关切的社会期待。”这是交通部副部长徐祖远对中国海上搜救中心提出的工作方法和目标，同时也是广大涉海人民群众对交通部海上搜救工作的切实需要。     

Study on lateral dynamic characteristics of vehicle/turnout system

Based on Chinese No. 12 high speed, single-way swing nose rail concrete sleeper turnout, a comprehensive vehicle/turnout system coupling dynamic model has been established in this paper, and the lateral and vertical dynamic characteristics of vehicle/turnout systems have been simulated while the car passes through the turnout zone on divergence. These dynamic characteristics show that the lateral impact and vibration of the systems caused by the wheel/rail contact and irregularity are very intensive, especially at the switch zone and nose area of the turnout, and the lateral dynamics of the turnout system, such as lateral stability, vibrating responses, impacting and the allowable passing velocity force between the wheelsets and the switch rails are much more complicated than that of the vertical ones.     

高速铁路接触网振动特性分析

简要介绍了法国、德国及日本高速铁路受电弓和接触网结构。建立了各类接触网的欧拉梁－集中质量模型及受电弓的框架模型，开发了其数值模拟软件。应用此软件分析了简单链形悬挂、弹性链形悬挂以及双链形悬挂的振动特性，并进行了相互间的比较分析。     

NET平台下水晶报表的应用

水晶报表是一款优秀的报表开发工具,简单、易用和功能强大,使得在开发信息管理系统时报表的开发变得很方便,本文介绍了在.NET平台下水晶报表在企业信息管理系统中的开发实例。     

地基土抗剪强度与极限平衡条件的评价分析

在确定地基土的抗剪强度的基础上 ,运用材料力学中平面应力状态的理论对无粘性土和粘性土均进行了极限平衡条件的评价分析 ,运用该分析方法进行工程实例计算 ,计算结果表明该方法较准确、可靠。