岸桥大车液压系统的防风改造

当大车液压系统故障时,现场手动强制作业,存在严重安全隐患。分析了对大车液压系统工况及问题,找出故障原因,并提出合理的解决方案,提高岸桥的安全性和可靠性。     

武汉市过长江交通流量特征分析

武汉市过长江交通是武汉市最主要的交通流向之一.根据流量观测数据分析长江交通流量特征,表明武汉市区过长江交通饱和,交通需求总量大,出行目的种类多.过长江交通没有明显、固定的高峰日和高峰小时,除通勤交通外,还有公务等大量非通勤交通,其中武昌与汉口之间交通是主流向,需要适当新增通道缓解过江难问题.     

含不确定参数的车辆动力学模型横向稳定性分析

考虑含有不确定独立参数摄动和非线性不确定性的车辆动力模型,应用Ｌｙａｐｃｎｏｖ稳定性理论和矩阵代数技巧导出系统的稳定性准则,准则给出的扰动界关于参数空间的原点可以是非对称的,充分利用了不确定的结构特点,掖大了稳定参数域。对承受不确定悬挂的车辆轮对的横向稳定性进行了鲁棒性分析,并与已有的结果进行了比较。     

口腔扁平苔癣患者红细胞免疫功能及发病机理的研究

采用酵母菌花环试验对３１例口腔扁平苔癣（ＯＬＰ）患者红细胞免疫粘附功能、循环免疫复合物、补体Ｃ３含量进行检测,并与正常组进行比较以研究患者红细胞免疫功能的改变与循环免疫复合物、补体Ｃ３含量的关系。结果表明：ＯＬＰ患者红细胞Ｃ３ｂ受体花环率、循环免疫复合物及补体Ｃ３含量均较正常组显著升高（Ｐ＜０．０１）。提示ＯＬＰ患者存在体液免疫紊乱及红细胞免疫功能代偿性增强。本实验为ＯＬＰ细胞介导的免疫损伤提供了又一证据,表明了红细胞免疫功能在口腔扁平苔癣发病机理及免疫防御中具有重要作用。     

基于CAN总线的汽车车身网络系统开发

介绍应用CAN总线开发的汽车车身网络系统。该系统具有车身电器网络化控制、模拟量采集、信息显示等功能,设计了可以保持汽车传统操作方式不变的人机接口,阐述了系统的开发思想、硬件设计、通讯协议及软件设计,总结了系统开发情况。     

Does a circular high-speed rail network promote efficiency and spatial equity in transport accessibility? Evidence from Hainan Island,China

This paper investigates the efficiency and spatial equity impacts of a unique island-looping high-speed rail (HSR) network in Hainan province, China. An integrated network and raster-based model is applied to accurately measure the accessibility indicators. We perform analysis at four different geographical planning levels – island, corridor, spillover, and county level. The HSR with a non-polarized topology can increase the accessibility of the entire island and corridor, but only leads to a slight increase in the spillover areas without HSR stations. HSR construction also leads to spatial cohesion for the entire island and corridor. Although the circular HSR network consists of several HSR stations distributed relatively equally, the results show that counties contribute differently to the cohesion of the entire island due to the varied initial level of accessibility values. Moreover, the county-level analysis reveals that the internal changes of each county are also different with balancing, polarization, and neutral effects appearing. Therefore, the internal equity of counties needs to be combined with their external contributions to global equity. Our framework permits policymakers to make customized HSR transport policies at different planning levels, particularly for an isolated area.     

无人船目标探测与跟踪系统

基于GNC架构完整构建了无人船目标探测和跟踪系统,并在案例三体船上完成了试验航行验证,在功能上实现了自主探测周围环境中的障碍物并对具有一定特征的动态目标进行跟踪航行。系统达成了如下目标：使用激光雷达探测周围环境的障碍物,运用有限的计算资源处理点云数据并保证实时性;通过特征提取、数据关联和运动状态估计,能够持续锁定目标;基于纯跟踪法实现了对目标船的跟踪航行。此项研究对实船应用具有较强的借鉴意义。     

苏州河段深层排水调蓄管道系统工程建设的 必要性分析

为有效应对上海市中心城区排水系统提标、内涝防治及面源污染控制等问题,上海规划建设苏州河段深层排水调蓄管道系统工程(简称苏州河深隧工程)。由于该工程规模较大、影响面广,同时国内尚未有排水深隧工程的建成案例,因此从响应国家相关政策法规的需要、满足上海市相关规划及政策的要求、满足人民群众对美好生活的向往、满足国际化大都市水环境治理的需要、满足智慧城市精细化设计和管理的需要、树立深隧技术解决中心城区防洪排涝工程示范等角度出发,系统论述了苏州河深隧工程建设的必要性。研究表明,建设苏州河深隧工程依据充分、效益显著、意义重大、影响深远,为该工程的推进和建设提供决策依据。     

Optimal synchronization and coordination of actual passenger-rail timetables

This study provides a novel solution for the synchronized and coordinated railway scheduling optimization (SCSO) problem by the determination of the departure times of a public transit network. Railway timetable optimization is dealt with maximizing the number of synchronized meetings to allow for smooth transfers at interchanges. The developed model uses binary variables to record the number of synchronized meetings considering the importance of transfer stations and rail lines without the need to apply the modeling of passenger assignments. The model allows for a permissible and flexible transfer waiting time for making a connection between rails instead of the commonly used and assumed values. The solution of the mixed-integer programing problem of larger-sized railway networks is based on a synchronized and coordinated scheduling optimization genetic algorithm (SCSO-GA) with a local search strategy (LSS). This solution method is proved to be more efficient and accurate than the CPLEX solver. In addition it is proven to be a periodic event-scheduling problem (PESP) solver. The model is tested computationally on the Beijing urban rail transit network. The results demonstrate the advantage of the novel approach over other methods.     

漂石及孤石地层中钻孔桩成孔工艺探讨

介绍了在漂石及孤石地层中钻孔桩的施工工艺,并对成孔过程中事故的处理及事故的预防方法进行了探讨。