试论制图教学的重要环节

机械制图的主要任务是培养学生的动手能力，而学生动手能力的培养必须要求教师通过备好制图、布置好制图作业、辅导好制图作业来实现。因此，上好制图课在制图教学中就显得尤为重要。     

复杂零件多直径的快速测量

基于计算机视觉技术，介绍了由一个通用的十字线激光器和一个CCD相机组成的视觉测量系统及其标定方法，辅以被测点的共面性约束，建立了系统的测量数学模型，并用其对一个复杂的多直径零件进行了测量实验，只需一幅图像，就可以同时测量出零件的多个直径。该方法不需要精密的夹具对零件进行严格定位，方便、快捷、实用，激光器也不需专门定做。     

广义Cury线搜索下一种新共轭梯度法及其全局收敛性

本文对无约束最优化问题：ｍｉｎｆ（ｘ），ｘ∈Ｒｎ，提出一种新的共轭梯度法．该算法中参数βｋ采用一种新取法，并结合广义Ｃｕｒｙ线搜索及ｎ步重新开始策略．在关于目标函数较弱条件假设下，证明了所给算法的全局收敛性．     

自动门限转速测量仪的设计

本文提出了自动门限测量转速的方法,同时介绍了采用8098单片机的A/D输入及PWM输出来实现自动门限,并且采用HSI及定时器实现转速测量的硬件电路及相应的软件设计方法.     

New method for reducing 2, 6-pyridinedicarboxylic acid diethyl ester to 2, 6-di(hydroxymethyl) pyridine

Reducing 2,6-pyridinedicaboxylic acid diethyl ester to 2,6-di(hydroxymethyl)pyridine was carried out by using NaBH₄/CaCl₂ as reducing agent. It is an improved and efficient method. The yield is up to 91% Wu Xinyan: born Mar. 1971, Ph. D. graduate student: Curent research interest is in the research of organic synthesis. Supported by the National Natural Science Foundation of China and the Special Funds of the State Education Committee for Doctorate Scientific Research     

关于灰分与热值计价问题

通过对霍林河矿务局露天矿褐煤灰分、热值及水分等特殊性，且其产品主要作为动力煤销售的特点的研究，对以灰分和发热量为基础的两种计价作一比较分析，确定更趋合理的结算方式。     

陕西镇安三叶木通野生资源调查

对陕西省镇安县三叶木通的生长情况进行了资源调查．从其生物学特性、分布状况等方面说明了三叶木通在镇安县生长的适宜性和可开发利用性,并阐述了三叶木通在镇安县开发利用的现状及展望．     

Seasonal variation of snow microbial community structure in the East Rongbuk glacier, Mt. Everest

Mt. Everest, the zenith of the world, plays an impor- tant role in the global climate change. During the lastdecade, some studies on glacier and snow have been undertaken in this region. The climate and environment changes in the past hundred years have b…     

Robot Calibration Using Active Vision-based Measurement

This paper presents an efficient robot calibration method with non-contact vision metrology. Using the coplanar pattern to calibrate camera made the active-vision-based end-effector pose measurement be a feasible and cost-effective way. Kinematic parameter errors were linearized and identified through two-step procedure, thus the singular and non-linear condition was overcome. These errors were then compensated using inverse model method. The whole calibration process is flexible, easy to implement and prevents the error propagation from the earlier stages to the later ones. Calibration was performed on MOTOMAN SV3 industrial robot. Experiment results show that the proposed method is easy to setup and with satisfactory accuracy.     

微乳模板控制合成磷酸钙盐材料

可以调控和诱导矿化的CTAB／正己醇／十六烷／水和TX100／正己醇／环己烷／水的两个拟三元微乳液体系作为磷酸钙盐矿化的“模板”．利用SEM、TEM、XRD和FT—IR等手段研究了产物的微观结构和组成．结果表明：不同的微乳及微乳中不同的相可以调控产物的形状、结构和大小，而且即使在相同的微乳体系中，由于成核作用的不同也可以导致最终产物的结构的不同．