城市电瓶轿车驱动系统的研究

为进一步拓宽电动汽车开发的视野,促进我国电动汽车市场化、多样化的发展,在综合分析电动汽车的驱动结构基础上,提出了一种新的驱动机构,经理论分析和试验证明是可行的.     

高压脉冲电子束在模具表面处理中的应用

模具的表面处理在模具加工中具有十分重要的地位,而电子束加工技术正是一种完全不同于传统机械加工的新的模具表面处理工艺.介绍了电子束技术在国内外的发展现状,概述了脉冲电子枪的加工特点及工作原理,以及该技术在模具表面精密加工中的应用以及工作台的设计思路.     

主动磁悬浮轴承的工作原理及发展趋势

磁悬浮轴承是利用磁场力将转轴悬浮在磁场中，使转轴在空间无机械接触、无磨损地旋转的一种新型高性能轴承。与传统轴承相比，具有许多优点。介绍了主动磁悬浮轴承的结构和工作原理，提出了磁悬浮轴承的现存问题。     

管道漏磁检测数据压缩算法的研究

漏磁检测技术是铁磁性油气管道在线缺陷检测的有效手段.由于检测数据量大，数据压缩是必不可少的.介绍了一种基于差分的嵌入式零树编码算法，算法首先对检测到的数据进行一阶差分处理，再对差分处理后的数据进行嵌入式零树编码，最后由差分嵌入式零树编码解压缩算法对数据进行还原操作.设计了以DSP为核心的硬件电路来实现该算法，并通过实验证了该算法的硬件电路的可行性以及在保留所有检测相关数据的基础上可以达到10∶1以上的压缩比.     

超强磁破甲弹磁头装置的磁路设计

介绍了超强磁破甲弹磁头装置的工作原理.通过对磁头装置的磁路设计,提出了磁头装置的工作点应选在有用回复能最大的位置上,并给出磁力计算方法和公式.     

快速循环热处理对(Co0.35Fe0.65)99O1薄膜磁性能的影响

针对(Co0.35Fe0.65)99O1薄膜,研究了两种不同热处理工艺对其磁性能的影响。结果表明:快速循环热处理可以改善高磁矩(Co0.35Fe0.65)99O1薄膜磁性能,在450℃几个快速循环热处理后,沉积薄膜的矫顽力从105下降到3 Oe,电阻率下降到70%,a-Fe (Co)相晶粒尺寸可以减小到15~35 nm,该处理方法较以往的热处理更能改善软磁薄膜的性能。     

离心研磨过程中物料运动特征对加工效果的影响

以在离心场中运动的整团磨料为研究对象,分析了离心研磨机在加工过程中物料运动特征对加工效果的影响.文中通过对高速摄影实验结果的分析,探讨了磨料流在离心场中的运动规律,指明磨料流在运动过程中,其滑移层的运动及前沿界面曲线的变化是影响加工效果的重要因素.通过在不同机器参数下对工件的研磨实验,进一步验证了物料运动特征对加工效果影响的分析结果.     

Research on the preparation of amorphous diamond nanorod arrays and their excellent field emitting properties

During recent years, with the rapid development of IT and micro-electrics, the ultra- thin, ultra-large display screen with low power consumption, has attracted more and more attention. As the core of devices, cathode materials are made much more demands in the vacuum microelectronic technology. So the materials with low power consumption, outstanding field emission properties and extreme stability are very important. To resolve the problem, many researchers have been making efforts. Diamonds…     

基于电热模拟法的热管散热器传热研究与仿真

运用电热模拟法对一种热管式芯片散热器的各项传热热阻进行分析,建立了该热管散热器在强制风冷条件下的电网络传热模型,导出了总传热能力的理论计算公式;运用CFD软件ICEPAK对某一设计计算实例进行仿真,模拟结果与理论值基本吻合,验证了所建电网络模型的基本合理性。     

The Boiler Tube Wall Thickness Quantitative Evaluation Fusing the Magnetic and Ultrasonic Technique

Wall thickness is always a key index for boiler tube inspection in power plant, in order to improve the inspection efficiency and accuracy, a new method fusing the magnetic and ultrasonic technique was proposed. The magnetic technique was used to do full inspection and locate the flaws, and the ultrasonic was employed to implement further quantitative inspection accurately. After comparing the precision of the polynomial, exponential and logarithmic function, the polynomial model was selected to fit the relations between the wall thickness and the peak value of magnetic signals, and the data measured by ultrasonic thickness meter was used to calibrate the model parameters online, the defect depth can be sized quickly. The experimental results demonstrate that the model used in this system has better accuracy than the statistics relation model clearly, and it is also suitable for defect evaluation real-time. Moreover, it is unnecessary to have much more experimental data for the curve fitting technology, so it has better practicability than the other methods.