舰船装备维修信息大容量记录器设计

在进行有源和无源电子标签比较的基础上,对有源大容量记录器的技术设计、结构设计进行讨论;分析保存于记录器中的维修信息数据格式,剖析记录器控制软件流程;并对影响大容量电子标签推广使用的电源设计、安全性设计进行分析.     

基于Modelica/MWorks的舰船液压操舵系统建模与仿真

在建立舰船液压操舵系统原件动态数学模型的基础上,利用MWorks软件实现液压能源系统动态特性分析通用模型库的构建.模型库包括长管路动态模型、液压泵数学模型、液压缸数学模型和其他元件如滑阀的数学模型,并根据模型库的元件建立了舰船液压操舵系统方案设计阶段的数理模型,对舰船的液压操舵系统进行了仿真.仿真结果表明,该模型符合实际系统的管路压力和流量脉动特性,在模型中能获得时域范围内系统的流量压力脉动情况.     

船舶载运易流态化货物的风险和对策

文中介绍了船舶载运精矿粉易发生事故的原因及其危害、预防措施、注意事项及补救措施等。     

海上搜救人员心理压力分析

文中从海上搜救值班人员和一线救援人员两个层面分析海上搜救人员面临的心理压力及表现,提出了提高海上搜救人员心理健康水平的相关对策。     

Income-contingent user preferences in policy evaluation: application and discussion based on multi-agent transport simulations

Standard economic policy evaluation allows the realization of projects if the aggregated economic benefit outweighs their costs. The use of one single aggregated welfare measure for evaluating and ranking projects has often been criticized for many reasons. A major issue is that differentiated effects on individuals or subgroups of the population are not taken into consideration. This leads to the need for transport planning tools that provide additional information for politicians and decision makers. The microscopic multi-agent simulation approach presented in this paper is capable of helping to design better solutions in such situations. In particular, it is shown that the inclusion of individual income in utility calculations allows a better understanding of problems linked to public acceptance. First, individual income-contingent utility functions are estimated based on survey data in order to describe human mobility behavior. Subsequently, using the MATSim framework, the implementation is tested in a test scenario. Furthermore, and going beyond Franklin (2006), it is shown that the approach works in a large-scale real world example. Based on a hypothetical speed increase of public transit, effects on the welfare distribution of the population are discussed. It is shown that the identification of winners and losers seems to be quite robust. However, results indicate that a conversion or aggregation of individual utility changes for welfare analysis is highly dependent on the functional form of the utility functions as well as on the choice of the aggregation procedure.     

连续刚构桥沥青砼桥面铺装病害调查与分析

文章结合连续刚构桥梁自身的受力特点,通过定量分析桥面铺装的病害种类和分布情况,得出裂缝、变形与防水粘结层失效是其铺装层破坏的主要形式,并分析了病害产生的原因,提出以铺装层顶面的横向拉应力和底面剪应力为铺装结构分析的力学控制指标。     

大直径嵌岩桩桩底溶洞探测方法探讨和应用

文章以山西省平阳高速公路嵌岩桩为工程背景,通过对目前常用探测方法的比较,分析了探地雷达法的独特优势,介绍采用探地雷达法对桩底溶洞情况进行探测的方法,并对使用探地雷达探测嵌岩桩桩底岩溶发育情况的基本步骤进行分析,分析结果表明,探地雷达法可以高效、快捷、准确地探测桩底的地质情况,是一种可行的、无损的溶洞探测方法。     

水泥土搅拌桩软基加固技术

文章以中铁十九局南钦铁路NQ1标软基加固工程为背景,阐述了水泥土搅拌桩的施工准备工作、试桩施工要点及检验方法、施工工艺流程,并提出了相应的施工控制措施。     

吊舱推进器研究开发与应用新进展

通过综述国内外电力推进船舶用吊舱推进器研究开发与应用的现状,分析、总结了相应的研究进展及取得的成果．结合吊舱最新发展趋势提出了一种仿鱼形吊舱,以改善吊舱的推进性能,扩大其应用场合．     

船用磁悬浮隔振器建模和鲁棒性研究

振动噪声是影响海军舰船战斗力的一个重要因素,本文针对舰船舱室的特殊应用环境,得到了影响隔振器稳定性的主要外部因素是环境噪声干扰和冲击干扰,采用实验建模得到的磁悬浮主动隔振器初级通道和次级通道脉冲响应模型进行了滤波x-LMS算法控制下的鲁棒性仿真。仿真结果验证了脉冲响应模型的有效性,也证明了磁悬浮主动隔振器具有很强的鲁棒性。