HXD1C型机车蓄电池防反接充电的设计改进

文章分析了蓄电池故障的机理和反接充电的危害,并对HXD1C型机车的蓄电池工作原理进行了介绍。针对机车目前的运行情况,对HXD1C型机车蓄电池的充电电路进行了深入研究,提出了3种防反接的改进方法,并对各种方法进行了详细的分析。综合各方法的优缺点,最后确定了一种经济适用的改进方案,即采用半波整流电路来防止外部电源接反,达到了保护蓄电池及其负载的效果。     

基于灰色GM（1，1）非等时距修正模型的轨道质量预测

根据灰色理论,以轨道质量指数检测数据为原始时间序列,通过累加弱化序列的随机性,挖掘轨道系统内在的规律,研究建立基于厌色GM(1,1)非等时距模型的轨道质量预测方法.为提高模型预测精度,优化模型中的初值和背景值,并基于残差分析引入周期性函数,对模型进行修正.用此模型对轨道质量指数TQI数据进行分析预测,并对模型精度进行检验.结果表明模型能较好地反映轨道质量恶化发展的随机波动特征,拟合、预测精度高,为了解和掌握轨道质量状态的发展规律提供了新的方法.     

D09-32捣固车卫星小车作业走行后退控制的改进

简要介绍了D09-32捣回车卫星小车作业走行后退控制的现状及缺陷;详细分析了改进其控制的方法:通过引入卫星小车位置信号FID和大车速度信号FlB增加一路电路单独控制卫星小车自动后退,实现当大车后退时卫星小车能完全与大车处于随动状态.     

HXD1型机车牵引装置上的螺栓连接

分析HXD1型机车牵引座的螺栓连接方式中的特殊点及其机理,并通过受力计算说明了衬套对螺栓使用可靠性的影响。     

南京地铁突发事件应急处置机制建设

介绍南京地铁1号线突发事件应急处置体系的建设,重点是组织机构的设置、应急救援队伍的建设、应急救援设备的配备、应急预案的规范管理等。结合在运营过程中的实际应用,对应急处置体系及时修改完善,为建立科学的城市轨道交通突发事件应急处置体系、提升应急处置能力提供参考。     

广州地铁车站照明系统节能研究

主要探讨广州地铁1、2号线车站照明系统的节能措施,对目前市场的节能产品进行测试和调研;从现实情况、成本核算和安全等方面进行对比。对地铁车站照明系统的节能模式、节能灯具选型进行分析,认为照明节能具有节能率高、能保持车站原有的装修风格等特点,是理想的节能方式。     

unning status of asynchronous motors by

otection,under-voltage protection and so on,can measure every kind of electricity,and can process the function of telecontrol,telemetering and telecommunication.The experimental result shows that the device has the characteristics of good real-time,high EMC,small volume and easy implementation.asynchronous motor relay;AT91FR40162;alternating current s     

Steady-state steering of a tilting three-wheeled vehicle

The design of a narrow-track enclosed vehicle for urban transport was the subject of the CLEVER project. Due to its narrow track and requirement for car-like controls, an actively controlled tilting system was integrated into the chassis to allow for high lateral accelerations without rolling over. The cornering behaviour of this unique vehicle concept is investigated and compared with the ideal Ackermann response. The steer kinematics of this 1F1T (one front wheel, one wheel tilting) configuration are assessed through the use of a steady-state steering model, with attention focused on how steer parameters such as tilt axis height and inclination can be tuned to provide the required response. A prototype vehicle was designed and built and the results of experimental testing are presented to illustrate the real balancing performance of the combined steering and tilting approach used for the CLEVER vehicle. The experimental results follow the trends demonstrated in the model.     

高职院校汽车领域“1+X”证书制度项目探究——以《汽车电子电气与空调舒适系统技术》中级模块为例

根据国务院印发的《国家职业教育改革实施方案》要求,文章首先分析1+X证书制度实施背景及现状实施情况,然后从完善职业技能等级标准体系,构建深度融合体系,教学过程与企业生产、学生就业对接,产教融合落地生根等三方面进行阐述,最后以本院汽车运用与维修专业针对《汽车电子电气与空调舒适系统技术》中级模块具体培训实例进行分析探究。     

MR IMAGING OF THE PANCREAS

Objective To evaluate the ability of showing the pancreatic diseases on various MRI sequences. Methods Eighty-four subjects included 50 normal individuals and 34 patients(22 patients investigated for pancreatic neoplasia and 12 pancreatitis) were presented. The MR protocol included conventional SE T1WI, FSE T2WI, Pre-and post-contrast T1-weighted fat-suppressed and GRE imaging. Results The best diagnostic information was provided by T1-weighted fatsuppressed imaging before and after gadolinium enhancement on 27 of 34 cases with abnormal pan creas, followed by immediately postcontrast GRE images. Precontrast GRE imaging better showed the features of a cute pancreatitis. FSE T2WI obviously exhibited islet cell tumor and metastases of liver from pancreatic adenocarcino ma. Conclusion The standard MR protocol included T1-weighted fat-suppressed image and dynamic GRE imaging.