渡口渡船:往事并不如烟

介乎于深秋与初冬渡口属于安静的一部分长度如果是标准那从脚下到对岸的距离在进行测量的同时便已注定结局比如终究的消亡或者形式的永恒两岸,从这头到那头规律如一对平行线永不到达一点而渡口如巨大钥匙打开的是遥远和空旷"......——网络诗歌摘抄     

数控高压电源的设计

介绍了一种将单片机数字控制技术与高压电源技术有机地结合在一起的数控高压电源设计方案.该高压电源系统输入为市电,输出为0～4kv连续可调的直流,最大输出电流10mA,最大电压波动为5%,具有输出稳定、调节方便、体积小和通用性强等优点.     

浙赣线CTC运用探讨

本文结合浙赣线CTC系统的建设实际,提出了在繁忙干线中列车运行控制和调车运行控制的冲突问题,CTC区段与非CTC区段的衔接问题,阐述了解决并进一步改进的方案。     

对治理大船小证的探讨

一些船舶采取不正当手段取得大船小证,不仅使船员．消防．救生及安全助航设施的配备降低了等级,增大了事故概率,而且偷漏了税费,扰乱了水运市场秩序。因此,加大力度查处大船小证是海事部门一项长期的工作。     

服务产品创新动力分析及支撑条件构建

本文提出了内、外驱动力相结合的动力模型,在对外部驱动力进行阐述的同时也对内部驱动力进行了详细论述,并给出了两种驱动力结合下企业的创新动力支撑条件.     

温拌泡沬沥青混合料技术探讨

温拌沥青混合料具有节能环保、适宜低温施工等优点,施工工艺与热拌沥青混合料基本一致。温拌泡沫沥青合料是温拌沥青混合料的一种形式,文章从材料选择、级配设计、最佳沥青用量、经济效益分析等几方面对温拌泡沬沥青混合料和普通热拌沥青混合料进行对比分析,以供参考。     

道路清障车扶正模型研究

道路清障车是交通事故紧急救援的主要装备,扶正作业是道路清障车的基本功能.针对目前国内扶正操作主要依靠清障救援人员经验,缺乏理论指导的现状,根据事故车辆与道路清障车的几何位置关系,建立了道路清障车扶正模型,该模型可实现事故车辆平稳快速扶正.利用该模型对扶正过程中各卷扬位移变化曲线及受力情况进行了分析,为后续道路清障车自动扶正研究奠定了基础.     

废胎胶粉掺量对橡胶沥青及混合料性能的影响分析

沥青中掺入废胎胶粉可改善沥青的各项性能指标,并增强沥青混合料的高温稳定性和低温抗裂性。在基质沥青不变的条件下,随着废胎胶粉掺量的增加,橡胶沥青的旋转粘度、针入度、软化点、低温延度和弹性恢复增大,橡胶沥青混合料的动稳定度和低温破坏应变也相应增大。     

Integrated chassis control for a three-axle electric bus with distributed driving motors and active rear steering system

This paper describes an integrated chassis control framework for a novel three-axle electric bus with active rear steering (ARS) axle and four motors at the middle and rear wheels. The proposed integrated framework consists of four parts: (1) an active speed limiting controller is designed for anti-body slip control and rollover prevention; (2) an ARS controller is designed for coordinating the tyre wear between the driving wheels; (3) an inter-axle torque distribution controller is designed for optimal torque distribution between the axles, considering anti-wheel slip and battery power limitations and (4) a data acquisition and estimation module for collecting the measured and estimated vehicle states. To verify the performances, a simulation platform is established in Trucksim software combined with Simulink. Three test cases are particularly designed to show the performances. The proposed algorithm is compared with a simple even control algorithm. The test results show satisfactory lateral stability and rollover prevention performances under severe steering conditions. The desired tyre wear coordinating performance is also realised, and the wheel slip ratios are restricted within stable region during intensive driving and emergency braking with complicated road conditions.     

万州晒网坝滑坡变形机理及稳定性规律跟踪研究

针对万州晒网坝滑坡地质勘查与长期监测滑移趋势不一致的现状,进行滑移机理跟踪,并通过物探验证跟踪结论。研究了135～175 m范围变化库水位及24 h强降水对该滑坡稳定性的影响,揭示了真实滑移面地质状况,纠正了地勘存在的不足,同时分析了滑移破坏机理。结果表明:该滑坡整体稳定、局部缓慢滑移;并提出了埋入式抗滑桩、裂隙封闭及地表排水的维护方案。