省道1941线揭西五云滑坡加固与治理

通过对省道1941线五云滑坡的发生、发展机理分析,根据滑坡地段工程地质及水文地质特征,确定采用轻型抗滑锚杆桩 支护面格子梁的加固方法,并对这一加固措施进行了阐述。     

机车柴油机机体主轴孔数据处理系统的设计与应用

介绍了铁路机车柴油机机体主轴孔数据处理系统的系统组成和基本功能,并对实际系统所运用的关键技术进行了研究和探讨。     

船舶制造企业劳动力负荷管理系统研究

探讨了如何将造船企业劳动力资源进行实物量化,如何与生产计划紧密配合进行劳动力资源的负荷平衡,研究并建立了劳动力实物量化模型,提出了劳动力负荷管理的系统流程及相应的功能模块设计。     

昆明市交通整治实践与思考

为了改善昆明主城区一环路以内的交通环境,解决交通拥堵,昆明市政府开展了交通整治项目。该文阐述了该项目的系统研究过程和实施效果,包括项目背景、问题分析、合理制订实施目标、如何选择优化措施、详细的设计方案、相关的配套设计及实施效果。     

结合梁结构在桥梁中的应用

桥梁采用结合梁结构,可以提高结构的性能,并且容易实现大跨度.以湛江海湾大桥、日本浜名湖曲塔大桥、上海轨道交通3号线跨中山北路桥等为例,介绍了结合梁结构在斜拉桥、矮塔斜拉桥、城市轨道交通高架桥、连续梁刚桥、人行天桥中的应用,并对结合梁钢一混结合部的设计、施工方法及养护维修进行了探讨.     

基于气动声学理论的喇叭型隧道缓冲结构优化

为了有效缓解隧道空气动力学效应导致的声爆现象,基于气动声学理论,对带喇叭型缓冲结构的隧道入口参数进行了优化。采用Green函数求解气动声学FW-H方程,得到了隧道内初始压缩波波前的压力和压力梯度,并根据喇叭型缓冲结构的特点,对缓冲结构的横断面积函数、入口断面积和长度进行优化设计。优化结果显示:隧道内压力梯度峰值随缓冲结构长度的增大而逐渐减小;考虑经济性因素,喇叭型缓冲结构的优化长度为10倍的隧道半径,优化缓冲结构的横断面积函数、入口断面积后,可使压力曲线成线性变化,压力梯度峰值降低63.9%,可避免入口处压力突变,缓解了声爆等微压波现象。      

复杂地形环境中电磁波多径传输建模与仿真

分析各种环境效应的产生原理及其计算方法,在此基础上设计一个通用的雷达及雷达对抗电磁波多径传输仿真系统,用于仿真各种环境效应引起的雷达及雷达对抗电磁波的衰减,该仿真系统具有良好的人机交互界面,通过不同的仿真设置可以满足不同的试验需求,从而可以更灵活地支持雷达及雷达对抗仿真试验。     

大型浮吊控制系统可靠性分析与仿真

根据系统的结构组成,以及现场收集的数据,建立了浮吊控制系统的故障树（FTA）;运用蒙特卡罗随机模拟方法,在Matlab环境下对系统进行了可靠性指标的计算与仿真,得出了系统的可靠度曲线,掌握了现有装置可靠性水平及影响可靠性的薄弱环节,同时,仿真结果为浮吊控制系统的维护和检修提供了依据。     

Transport for older people: Characteristics and solutions

Entering the 21st century, one of the most significant demographic changes in developed countries is the aging of the population. Travel is an important aspect of older people's economic well-being, so with the aging of the population, improving transport for older people is increasingly important. This article presents the results of a study of older people's travel behaviour based largely but not exclusively on LATS (London Area Travel Survey) 2001 data. The focus is on older people's trip chaining behaviour, including trip chain complexity, trip purpose sequence and mode choice in a chain. After identifying the policy implications it looks at the role of Special Transport Services in improving the supply of transport for older people, taking the London Borough of Camden as a case study.     

Experimental study on hydrodynamics of L-type podded propulsor in straight-ahead motion and off-design conditions

Experimental tests were conducted to evaluate the hydrodynamic performance of an L-type podded propulsor in straight-ahead motion and off-design conditions using an open-water measuring instrument developed by the authors for podded propulsors, a ship model towing tank, and under water particle image velocimetry (PIV) measurement systems. Under the three types of conditions, the main parameters of an L-type podded propulsor were measured, including the propeller thrust and torque, as well as the thrust, side force, and moment of the whole pod unit. In addition, the flow field on the section between the propeller and the strut was analyzed. Experimental results demonstrate that the dynamic azimuthing rate and direction and the turning direction affect the forces on the propeller and the whole pod unit. Forces are asymmetrically distributed between the left and right azimuthing directions because of the effect of propeller rotation. The findings of this study provide a foundation for further research on L-type podded propulsors.