公积金监管系统中的多级数据集成研究

数据集成是住房公积金三级监管系统中的核心和难点.对比传统集成方法的缺陷和现有系统存在的问题,提出了运用中间件技术对分布式、异构数据进行分析和整合的解决方案.基于EA Server应用服务器,实现了该集成方案,使系统的执行效率、系统的可维护性和灵活性均得到了大幅提高.     

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目前在高速公路上应用的监控系统中，很少能有效进行联网控制，并且通常的联网控制方案并不适用．我们在实际工程的实践基础上，提出了分布式网络控制的概念，并对中心监控系统中信息发布系统，阐述了其分布式系统模型，并针对主要的技术问题提出了完整的解决方案．在具体设计实现时，我们以保护用户投资和节省成本为我们设计分布式信息发布系统的首要原则．只有在很低的成本的情况下，级联监控系统才能具有很强的适应能力．扩展能力是第二原则，只有很强的扩展能力，才能达到日益增长和变化的需求，达到设备无关性设计．     

动力分散型动车组牵引性能试验方法研究

文章提出了一种动力分散型动车组的牵引性能试验方法,并以马来西亚动车组的牵引性能试验结果进行论证。     

大型分布式异构环境下的视频监控和录像控制

城市轨道交通大多为地下封闭型的建筑,其安全性尤为重要。利用现有的轨道交通安全防范系统,用最小的投资,建设大型分布式异构环境下的视频监控和录像控制系统,为轨道交通的安全运行,保护乘客的安全发挥更大的作用。     

Distributed and self-adaptive vehicle speed estimation in the composite braking case for four-wheel drive hybrid electric car

Considering the controllability and observability of the braking torques of the hub motor, Integrated Starter Generator (ISG), and hydraulic brake for four-wheel drive (4WD) hybrid electric cars, a distributed and self-adaptive vehicle speed estimation algorithm for different braking situations has been proposed by fully utilising the Electronic Stability Program (ESP) sensor signals and multiple powersource signals. Firstly, the simulation platform of a 4WD hybrid electric car was established, which integrates an electronic-hydraulic composited braking system model and its control strategy, a nonlinear seven degrees-of-freedom vehicle dynamics model, and the Burckhardt tyre model. Secondly, combining the braking torque signals with the ESP signals, self-adaptive unscented Kalman sub-filter and main-filter adaptable to the observation noise were, respectively, designed. Thirdly, the fusion rules for the sub-filters and master filter were proposed herein, and the estimation results were compared with the simulated value of a real vehicle speed. Finally, based on the hardware in-the-loop platform and by picking up the regenerative motor torque signals and wheel cylinder pressure signals, the proposed speed estimation algorithm was tested under the case of moderate braking on the highly adhesive road, and the case of Antilock Braking System (ABS) action on the slippery road, as well as the case of ABS action on the icy road. Test results show that the presented vehicle speed estimation algorithm has not only a high precision but also a strong adaptability in the composite braking case.     

Labview在船用振动噪声故障监测系统中的应用研究

基于虚拟仪器研发1套通过分布式测量方法实现对船舶各主要运行设备的振动噪声水平进行实时监测的系统。通过数据分析对设备的运行状态进行评估,当运行异常时,系统发出预警和报警,系统采集的大量历史数据也可为设备故障的预判、排除及后续船型的设计和改进提供有力支持。     

服务雄安·交通光电网创新发展论坛 ——“交通7+1论坛”第五十一次会议

雄安新区作为北京非首都功能疏解集中承载地,将建设成高水平社会主义现代化城市、京津冀世界级城市群的重要一极、现代化经济体系的新引擎、推动高质量发展的全国样板.论坛以“服务雄安•交通光电网创新发展论坛”为主题,说明了光电网是服务雄安新区建设,构建智慧交通、智慧城市的可靠、安全、稳定的基础网络;针对新能源和可再生能源技术特点,通过能源互联网建设,构建能源物理网和互联网融合平台,可实现整个能源系统效率的最优化;分析说明了分布式光纤传感技术可为城市管网、道路等基础设施的智能检测、灾害预警报警提供有力支持.     

分布式驱动电动汽车转矩节能优化分配

为了提高分布式驱动电动汽车的经济性和续航里程,对4个轮毂电机驱动转矩优化分配问题进行研究。通过轮毂电机台架试验得到轮毂电机的驱动效率特性,分析转矩优化分配实现节约整车能耗的可行性;建立侧重提高电机效率的目标函数,使电机转矩处于电机效率Map图中的高效区;建立侧重提高电机响应速度的目标函数,减小转矩分配瞬间电流波动过大带来的能耗;基于模糊理论设计以电机效率为变量的权重函数,实时调节权重来协调2种目标函数,提出一种转矩节能优化分配方法,得到最优的轴间转矩分配系数。在后轴驱动、平均分配、优化分配3种分配方式下进行整车能耗的ECE城市循环工况对比仿真分析。结果表明：提出的节能优化分配方法通过实时优化驱动电机的转矩,避免了电机工作在转矩过大和过小的低效区,提高了整个驱动系统的能量利用率,相比于后轴驱动和平均分配整车能耗效率提高了5.91%和10.54%;实车试验验证了转矩节能优化分配算法的节能效果,优化分配相比另外2种分配方式整车能耗效率分别提高了3.66%和8.58%。     

Parallel Distributed Implementation of Truss Optimization on a Local Area Network

A two-level optimization method for the design of complex truss and parallel distributed implementation on a LAN is presented using parallel virtual machine (PVM) for Win 32 as message passing between PCs. The volumes of truss are minimized by decomposing the original optimization problem into a number of bar optimization problems executed concurrently and a coordinate optimization problem, subject to constraints on nodal displacements, and stresses, buckling and crippling of bars, etc. The system sensitivity analysis that derives the partial derivatives of displacements and stresses with respect to areas are also performed in parallel so as to shorten the analysis time. The convergence and the speedup performances as well as parallel computing efficiency of the method are investigated by the optimization examples of a 52-bar planar truss and a 3 126-bar three-diraensional truss. The results show that the ideal speedup is obtained in the cases of 2 PCs for the 3 126-bar space truss optimization, while no speedup is observed for the 52-bar truss. It is concluded that (1) the parallel distributed algorithm proposed is efficient on the PC-based LAN for the coarsegrained large optimization problem; (2) to get a high speedup, the problem granularity should match with the network granularity;and (3) the larger the problem size is, the higher the parallel efficiency is.     

网络列车运行图分布式数据库访问设计

对计算机编制列车运行图系统采用Ｃ／Ｓ结构的分布式数据库技术来组织和管理数据中的关键技术－多用户数据访问技术进行了研究,提出了以ＰｏｗｅｒＢｕｉｌｄｅｒ和ＶｉｓｕａｌＣ＋＋为工具,采用ＯＤＢＣ技术来这实现系统多用户对数据库的实时访问的方法。实际开发与应用表明,该方法能方便、快速地连接和访问目标数据库。