无缝线路模型轨道的流变特性实验

通过对模型轨道的实验，验证了无缝线路（ＣＷＲ）流变理论模型的正确性，并为将来进行实物轨道的流变特性实验提供了具体步骤和确定流变理论参数的方法。     

STUDY ON THE EFFECT OF T-2 TOXIN AND SELENIUM ON CD44 EXPRESSION IN THE CULTURED HUMAN FETAL CHONDROCYTES IN VITRO

KBD (Kashin BeckDisease)isasevere ,en demicosteoarthrosisandthepathogenesisofitisstillapendentproblem[1] .WiththestudyofetiologyofKBD ,thehypothesisofselenium deficiencyinthesurroundingandfoodcontaminatedbyfungaltoxinisanoticeableone .The pathologicalfeaturesofKBDarethedegenerationandnecrosisofthearticu larcartilage ,disorderofmetabolismofcartilagematrix .Thestudyontheosteoarthrosissuggeststhatthereductionoftheaggregationandincreaseofdeg radationofaggrecanareinitialaffairsifcartilagehasdeg…     

不明原因不孕妇女月经周期中血清微量元素的研究

对19例不明原因不孕和14例已育健康妇女共33个月经周期中血清锌、铜、铁、锰、镍含量进行分析。结果表明：对照组排卵日血清锌、铜明显低于印泡中期和黄体中期，印泡中期铁、镍含量最高，在周期中呈递减趋势（P均＜0．05）；与对照组比较，不孕组除印泡中期镍减低外，各期血清钢及黄体中期锌、镍、铁均显著增高（P＜0．001，P＜0．05，P＜0．01），而各期血清锌／铜、铁／铜比率明显降低（P＜0．05）。研究提示：正常妇女月经周期中微量元素水平具有规律的周期变化，且相互存在恒定的比值，微量元素的代谢紊乱可能是不明原因不孕的重要因素之一。     

立足现在、面向未来的三层交换网络设计

文章着重描述了第三层交换式路由技术原理和实现方法，并给出建设企业骨干网的设计思想。     

ITS中VDM设备的研究与实现

文章介绍了专门用于ＩＴＳ（智能交通系统）中的一种多功能视频叠加设备－－ＶＤＭ的设计。针对ＩＴＳ应用中的主要特点和要求，ＶＤＭ采取了一些相应的技术措施，该设备现已被成功地应用于交通收费系统中。     

高速公路网路径确认技术探讨

随着各省市高速公路的大力发展，网状道路快速形成，全省联网收费系统的逐步实施，路径确认是一个省级联网收费的关键和难题，文章着重阐述了高速公路网中路径确认的基本方法和思想，并对各方法进行了比较和效益分析。     

一种用于1／2汽车主动悬架的可调模糊控制器

本文对用于1／2汽车主动悬架系统的模糊控制器进行了研究。在设计模糊控制器时，引入模糊控制规则调整因子，使得控制策略灵活，适应性强，并以模拟路面时间历程为输入对汽车1／2主动悬架模型进行计算机仿真，结果表明用这种可调模糊控制器控制的主动悬架，汽车的适性和操纵稳定性都得到了明显改善。     

Wheel slip control with torque blending using linear and nonlinear model predictive control

Modern hybrid electric vehicles employ electric braking to recuperate energy during deceleration. However, currently anti-lock braking system (ABS) functionality is delivered solely by friction brakes. Hence regenerative braking is typically deactivated at a low deceleration threshold in case high slip develops at the wheels and ABS activation is required. If blending of friction and electric braking can be achieved during ABS events, there would be no need to impose conservative thresholds for deactivation of regenerative braking and the recuperation capacity of the vehicle would increase significantly. In addition, electric actuators are typically significantly faster responding and would deliver better control of wheel slip than friction brakes. In this work we present a control strategy for ABS on a fully electric vehicle with each wheel independently driven by an electric machine and friction brake independently applied at each wheel. In particular we develop linear and nonlinear model predictive control strategies for optimal performance and enforcement of critical control and state constraints. The capability for real-time implementation of these controllers is assessed and their performance is validated in high fidelity simulation.     

A real-time posture monitoring method for rail vehicle bodies based on machine vision

Monitoring vehicle operation conditions has become significantly important in modern high-speed railway systems. However, the operational impact of monitoring the roll angle of vehicle bodies has principally been limited to tilting trains, while few studies have focused on monitoring the running posture of vehicle bodies during operation. We propose a real-time posture monitoring method to fulfil real-time monitoring requirements, by taking rail surfaces and centrelines as detection references. In realising the proposed method, we built a mathematical computational model based on space coordinate transformations to calculate attitude angles of vehicles in operation and vertical and lateral vibration displacements of single measuring points. Moreover, comparison and verification of reliability between system and field results were conducted. Results show that monitoring of the roll angles of car bodies obtained through the system exhibit variation trends similar to those converted from the dynamic deflection of bogie secondary air springs. The monitoring results of two identical conditions were basically the same, highlighting repeatability and good monitoring accuracy. Therefore, our monitoring results were reliable in reflecting posture changes in running railway vehicles.     

北京公交集团信息化绩效评估研究

根据北京公交集团信息化工作需要,确定了信息化绩效评估工作目标,结合市级层面要求和企业自身特点明确评估要点,综合采用调研、访谈、文档检查、试点评估等方法,分别对信息系统和二级单位建立了测评指标体系。实践表明信息化绩效评估工作对提升公交企业信息化整体水平有明显推动作用。