铁矿尾矿料在公路工程中的应用

通过对铁矿尾矿料的试验分析和在等级公路路面基层的应用实践,研究了铁矿尾矿料在路面基层中的应用特性,提出了利用尾矿料作基层集料的配合比设计方法及施工工艺,为类似工程应用提供了参考依据.     

东风日产天籁·御系列:豪华车·新定义

天籁·御系列横空出世 2007年7月1日,东风日产乘用车公司宣布:基于日产强大的全球技术平台而倾力打造的全新产品--天籁·御系列,即日开始在全国发售.这是继2004年天籁导入中国后,首次在功能配置和内在技术上实现跨越性突破的全新系列.     

碎石封层配合比设计方法研究

结合我省碎石封层推广应用经验,通过将配合比设计的经验法和理论法相结合的方式,研究碎石封层的配合比设计方法,确定碎石和乳化沥青等材料的最佳用量,从而提高碎石封层的耐久性和适用性,促进碎石封层在我省的推广和应用。     

基于VISA技术的高速USB数据采集系统

高速USB数据采集系统的设计严格遵循USB2.0协议,实现了主机和测试设备之间简单、快速、可靠的连接和通信.该文介绍了这种数据采集系统的硬件组成、驱动程序和固件程序的设计以及采用虚拟仪器软件LabWindows/CVI在VISA技术上开发应用程序的设计方法.     

大连城市轨道交通运行效果分析暨公共交通结构优化对策研究

结合大连市城市交通发展现状,总结大连市居民出行特征,并对轨道交通运营效果进行评价,指出大连市存在轨道交通与常规公交竞争严重、地铁票价较高、新线建设进度滞后、既有线与城市发展不匹配、外围线客流强度低、沿线用地开发强度低、用地性质分布不均等问题,提出大连市公共交通的几点发展对策:加速产业转型,提高城市活力;专题研究票制票价...     

基于WebGL扩展模型的铁路运维可视化研究

中国铁路建设逐渐进入运营维护高峰期。为利用BIM技术解决运维阶段信息化管理存在的数据阶段性转换难度大、可视化效果不佳等问题,基于B/S架构对BIM技术在铁路运维中的可视化技术展开研究。使用Revit精细化地搭建铁路运维中的监测设备对应的监测点族模型,将其作为运维数据集成与可视化管理的载体;基于MySQL数据库,以传感器在监测物联网体系中的采集仪与采集通道编号为主键,进行铁路运维管理数据系统的设计与搭建。利用Three.js引擎进行运维云平台的开发,并研究在Web端进行运维属性附加的可行性,结合Cesium引擎独立在Web端集成扩展轻量化运维BIM模型。基于上述研究,形成基于WebGL扩展模型的铁路运维云平台并丰富其功能,能够实现现场监测数据在数据库中的结构化存储。在运维云平台中对监测点族进行附加,并且可以将监测数据与监测点族的显示状态进行关联,实现运维阶段信息的高效集成与可视化。结合工程案例,验证本扩展模型运维云平台的应用效果。基于B/S架构中的Three.js及Cesium.js引擎研究的运维模型扩展可视化方式,能够打通铁路运维过程中的数据采集、数据处理到数据可视化管理的全过程,摆脱...     

A Target-Orientated Marker Image Binarization Method for Orthopaedic Surgical Navigation System

Camera calibration is the key technique in a C-arm based orthopaedic surgical navigation system. The extraction of marker location information is a necessary step in the calibration process. Ideal marker images should possess uniform background and contain marker shadow only, but in fact marker images always possess nonuniform background and are contaminated by noise and unwanted anatomic information, making the extraction very difficult. A target-orientated marker shadow extraction method was proposed. With this method a proper threshold for marker image binarization can be determined.     

Development and Theoretic Validation of Model of Drum Level Sloshing

In order to develop a feasible model of drum level sloshing, the mechanism of drum level sloshing was analyzed, and the model of drum level sloshing was developed on the Easy5 software flat. The thermodynamic property of the model was validated by using the reference model, which was set up by using the method of lump parameter. The results indicate that the model can precisely reflect the phenomena of thermodynamic property inside drum, and the numeric error is within 1%. And the hydraulic property of the model was validated by the analytical theory of liquid sloshing, and the results indicate that the hydraulic property inside drum can also be correctly reflected by the model, and the sloshing period error is within 5%. The important work was done for exploring modeling for drum level sloshing, research of drum level sloshing and precision controlling of drum level.     

Learning User Intention in Networked Mobile Robot Control

Teleoperated networked robot often has unpredictable behaviors due to uncertain time delay from data transmission over Internet. The robot cannot accomplish the desired actions of the remote operator in time, which severely impairs reliability and efficiency of the robot system. This paper investigated a novel approach, learning user intention, to compensate the uncertain time delay with the autonomy of a mobile robot. The user intention to control and operate the robot was modeled and incrementally inferred based on Bayesian techniques so that the desired actions could be recognized and completed by the robot autonomously. Thus the networked robot is able to fulfill the task assigned without frequent interaction with the user, which decreases data transmission and improves the efficiency of the whole system. Experimental results show the validity and feasibility of the proposed method.     

汽车动力电池更换装置设计

文章设计了一种新能源汽车电池动力外接电池更换装置,在加油站、充电站和高速路服务区等地可以通过电池装卸机构自行拆装,以达到给车辆增加续航能力的目的。更换装置解决了外接电池更换困难的问题,降低了人工的劳动强度,具有方便、快速的特点,具有很大的市场推广空间。