08-32型捣固车激光拨道系统

着重介绍了大型养路机械０８－３２型捣固车拔道作业伺服系统的原理和利用激光技术实现直线自动拨道的方法。     

筑路机械单机核算的思考与研究

介绍了单机核算的概念，概述了单机核算的目的、现实意义以及应做好的基础工作。提出了“全项核算法更适用于单机核算”的论断，并基于此法阐述了核算内容，给出了实施单机核算的工作步骤，对改进机械设备管理具有重大意义。     

From robotics to automotive: Lane-keeping and collision avoidance based on elastic bands

In the near future, drivers will more and more share vehicle guidance with assistance systems. This contribution provides a potential field-based approach to the underlying motion planning problem. In doing so, the concept of elastic bands, known from robotics, is extended to automotive applications. Contrary to robotic applications, extrapolation routines anticipating the motion of the surrounding traffic are incorporated in the motion planning. New in this paper is the distinction of different types of obstacles such as traffic staying in its lane and traffic intending to depart from it. Beyond that, the motion planning adapts to the driver's commands. The driver can be included in the overall control loop by means of a haptic interface generating a torque that depends on the difference of the actual steering angle and the steering angle necessary to follow the planned trajectory. However, this contribution focuses only on the underlying motion planning procedure.     

盾构机近距离上穿既有隧道施工技术研究

随着全国城市地铁建设规模的不断扩大,地铁网络日趋复杂,新建线路施工将不可避免地对既有线路产生扰动。本文以南宁地铁2号线东延工程出入场线于泥灰岩地层近距离上穿既有正线成型隧道为背景,对上穿既有结构的风险进行分析。通过在盾构机掘进前后对夹层土体进行深层注浆、下部隧道搭设扣件式满堂支撑体系、施工过程动态调整掘进参数,以及全周期不间断风险监测等多种措施,有效保障了上部隧道的顺利掘进以及下部成型隧道的结构安全,为类似工程提供参考依据。     

大型养路机械电子插件自动测试系统

介绍了大型养路机械电子插件自动测试系统的软硬件结构,详细阐述了调试大纲的添加、删除、编译和检查、电路板的调试流程等内容。该系统目前主要应用于大型养路机械的48引脚和96引脚电子插件的检测上,并可拓展到其他铁路设备上。     

水泥混凝土路面轨模式摊铺机施工方法的探讨

从施工准备、拌和运输、摊铺与振捣、表面整修、养护等方面阐述了水泥混凝土路面轨模式摊铺机施工的方法和注意的问题。     

Resistance torque control for steer-by-wire system to improve human–machine interface

A steer-by-wire system, which has no mechanical constraints between steering wheel and front wheel, is expected to improve steering performance. The mechanical resistance torque is not transmitted from the front wheel to the steering wheel, and it is essential to simulate the torque around the steering wheel for better human-machine interface. Previous studies investigated resistance torque control originating from vehicle behaviour variables such as yaw rate and lateral acceleration. However, other variables such as steering wheel angle and front wheel actuation force are also good candidate sources to generate resistance torque. In this paper, first, four general guidelines are introduced to evaluate three types of resistance torques, i.e., the steering wheel angle origin, the steering force origin and the vehicle behaviour origin. First two guidelines are for ‘driver-made’ phase to make a turn, while the third guideline is for ‘vehicle-made’ phase to return to straight driving and the fourth one is the applicability guideline. Satisfaction of these guidelines by each of the three resistance torques is examined by the actual vehicle experiment. A necessity of combining these three types of resistance torques is indicated as a future subject.     

汽车开关钥匙在数控开齿机上的加工

提出了在数控开齿机上加工汽车钥匙．其加工精度和生产效率较以前大大提高。     

大数据背景下的路径选择行为建模

路径选择建模的主要任务是基于合理假设，定量分析交通参与者的路径选择行为，并估计和预测交通参与者对交通网络的使用情况。基于此，全面总结路径选择建模的研究现状，介绍各种出行数据的特点，阐释常见的选择集生成方法，对文献中提出的众多离散选择模型进行归类和讨论，对比模型估计的2类主要方法，并展望机器学习在路径选择建模中的广阔前景。研究结果表明：随着交通感知技术的全息化发展，在海量车辆轨迹数据的支撑下，路径选择研究取得了全方位的进步；路径选择模型可分为基于路径和基于路段的模型，前者以路径为基本选项，从通过确定性或随机性方法生成的选择集中选择路径，包括多项Logit （MNL）模型以及更先进的MNL修正模型、广义极值（GEV）模型、混合Logit模型和非GEV分布模型，后者以路段为基本选项，动态地求解路径选择问题，无需生成选择集，包括各种递归Logit模型；路径选择模型的参数估计可使用有标签数据或无标签数据，前者通过地图匹配在交通网络中重构出真实路径，后者则依概率考虑一系列可能的路径。近年来，基于机器学习的路径选择模型因具有更优的预测性能而受到广泛关注。在未来的路径选择研究中，应进一步结合离散选择模型和机器学习模型，使两者优势互补。     

第三方物流:你的卖点在哪里

近年来,旋挖钻机在桥梁桩基施工中的使用越来越普遍,本文就旋挖钻机施工的准备、钻机操作等工艺进行了简述。