C63A敞车钩缓组成拆卸装置的研制

９０年以来Ｃ６３Ａ敝车进行站修、段修过程中，钩缓组成拆卸问题一直未能很好的解决。以往采用的从美国引进的钩缓拆卸装置由于其结构的限制，造成工人操作繁琐。该工序所占工作时间较长，直接影响整个车钩组成换装工作进度，即“卡脖子”工序， 远远满足了不了段修工作要求，并且操作中易发生碰手伤人现象。根据铁道部大秦线亿吨配套工程会议精神要求，９７年３－７月Ｃ６３Ａ敝车需换装３１００多套１６号转动车钩，如继续采用后     

FAULT IDENTIFICATION IN HETEROGENEOUS NETWORKS USING TIME SERIES ANALYSIS

Fault management is crucial to provide quality of service grantees for the future networks, and fault identification is an essential part of it. A novel fault identification algorithm is proposed in this paper, which focuses on the anomaly detection of network traffic. Since the fault identification has been achieved using statistical information in management information base, the algorithm is compatible with the existing simple network management protocol framework. The network traffic time series is verified to be non-stationary. By fitting the adaptive autoregressive model, the series is transformed into a multidimensional vector. The training samples and identifiers are acquired from the network simulation. A k-nearest neighbor classifier identifies the system faults after being trained. The experiment results are consistent with the given fault scenarios, Which prove the accuracy of the algorithm. The identification errors are discussed to illustrate that the novel fault identification algorithm is adaptive in the fault scenarios with network traffic change.     

用于拆卸底板螺母的小型夹具

高尔基铁路局某机务段的1名合理化建议者制作了1台用于拆卸5Д49型柴油机主轴承顶部棘钉螺母的小型夹具(见图1).该小型夹具装置中包括了带滑轮的支撑杆、钢绳以及用于拆卸棘钉螺母的专用扳手等组件.     

故障排除实例

故障现象:一辆春兰125一5改进型摩托车行驶3400Okm发现,发动机左盖下方漏油,维修工拆卸检查,更换了左曲轴箱汕封和超越离合器油封,但行驶不到300km,用户又来维修站反映该车左盖下方仍然存在漏油现象,故障原因不详。故障分析与排除:仔细询问车主,初次更换左曲轴箱油封和启动大链     

无线通信中最大似然序列估计的改进方法

无线通信中应用最大似然序列估计，其时延和计算复杂度是必须解决的两个问题。为跟踪时变的移动无线信道，必须采用自适应信道估计器来提供信道信息。针对以上问题，综述了减少时延和计算复杂度的解决方法，并讨论了各种方法在复杂度和性能之间的权衡。最后指出了今后的研究方向。     

基于接近现实环境的船舶设备虚拟装配仿真研究

本文论述MultiGen Creator和Vega虚拟现实软件开发船舶设备装配仿真应用程序的方法及关键技术,并以船舶机舱舷侧管的拆装为研究对象,探讨了仿真应用程序的开发框架,分析了MultiGen Crea-tor建模技术,研究了应用程序平台开发的理论方法。