Kinematics and Dynamics Analysis on the Mobile Mechanism of a Micro Piping Robot

A micro piping robot is able to help people finish tasks such as inspection inside a mini pipe. Research on the mobile mechanism of the robot is very important in the robot researching area. The kinematics and dynamics characteristics of the mobile mechanism for a planetary gears driven micro robot have been studied. The operation, the principle and the affect factors of the mobile mechanism have been discussed in detail. In order to drive the robot well, the adhesion and the power of the mobile mechanism should be increased as the influence of its autoeciousness power has been reduced.     

林产品交易市场现货远期合约交易的结算

分析了林产品交易市场现货远期合约交易的适应性及其特点，讨论了结算机构的设立、结算方式选择等基本问题；确立了林产品现货远期合约交易的结算保证体系与结算执行体系；设计了一套适合我国林产品交易市场特点并保障其健康发展的现货远期合约交易的具体程序和方法。     

林业有害生物检疫测报信息管理系统的开发

为实现林业有害生物数据采集自动化、传输无线化、虫情发布网络化,该文结合林业有害生物检疫测报的工作特点,综合GPS、数字3G传输技术设计了林业有害生物检疫测报信息管理系统,可为林业有害生物预测预报提供辅助决策。     

3-RPS并联机构正解快速数值算法

提出了一种求解3-RPS并联机构正解的快速数值解法.利用3-RPS型并联机构的结构特征,首先计算出一组位姿坐标作为迭代初值,然后通过逆解求出上平台各个铰支点的坐标,并对其进行修正,得到一组新的位姿坐标.如此反复迭代,最终得到精确解.新算法物理模型清晰,计算公式简单.由于不需要计算雅可比矩阵及其逆阵,所以计算工作量较小....     

Vorticity analysis associated with drafting cylinders for pneumatic spinning

Traditional spinning systems have reached profitability limits in developed countries due to high production costs and low system productivity. Pneumatic spinning is seen as a developing system, because productivity is much higher than conventional systems. This study evaluates one of the main problems to increase productivity in pneumatic spinning, where air mass-flow is dragged by the drafting cylinders. This flow interacts with the incoming fibres deviating them from their expected path. Via laser anemometry, airflow velocity distribution around drafting cylinders has been measured and it has been found that vorticity is created at the cylinder’s inlet. Extensive CFD simulation on the air flow dragged by the cylinders has given a clear insight into the vortex created, producing valuable information on how cylinder design affects the vorticity created. Several drafting cylinder designs have been tested without giving any improvement in productivity. However, the use of a drafting cylinder with holes in it produced good results to the problem of air currents, strongly reducing them and therefore allowing a sharp increase in yarn quality, as well as an increase in productivity. An extensive study on vortex kinematics has been undertaken, bringing with it a better understanding of vortex creation, development and breakdown.     

大学语文教学中的创新教育

创新,是社会发展的需要,是素质教育的核心。培养学生的创新能力是大学语文教学的一项重要任务。在教学中,树立现代教育观念,培养学生的创新思维,巧妙设疑,鼓励质疑,培养学生的创新意识和创新能力。     

车辆动态称重系统误差产生机理

车辆动态称重系统广泛应用于治理超载超限运输,其称量精度与车辆通过计量平台时的运动状态有一定的关系。首先对运行车辆进行运动学分析,找出影响动态称重系统称量精度的主要运动形式,并以此为依据,得出车辆轴载称量原理,最后分析了车辆通过计量平台时的振动来源,以揭示称重系统误差产生机理。