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technical   parameter
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     Technical Parameter Test of GSM-R Construction
     GSM-R施工技术指标测试
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     At last, technical parameter of system is given.
     最后给出系统的参数要求。
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     On Technical Innovation
     谈技术创新
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     Technical Alienation
     技术的异化──当代日本建筑的技术表现
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     Scattering Parameter
     散射参数
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This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper,...

This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper, the properties in the design of the laser interferometer system and the problems concerned with application of laser to precision positioning of the working table in the camera are given with some emphasis. At the sametime, it affords major technical parameters and experimental data. At the end of this paper, the analysis of accuracy and the result of calibration of the cameras show that actual accuracy of the cameras is up to about e0.75 micron. Cameras of this type are now used in industrial practice.

本文介绍一种用氦氖气体激光器作光源,以光干涉原理定位的自动分步重复照相 机。该机主要由激光干涉系统、精密机械系统、电子控制机和激光频率稳定器组成。由 于采用激光干涉定位系统直接测量工作台位移,保证重复定位精度高于±1微米。 文中着重介绍激光干涉系统结构设计特点及激光用于精密定位时的有关问题.同时 提供了主要技术参数和实验资料。对整机的精度分析和检定结果说明,产品实际精度可 达到±0,75微米。此种分步相机现已用于工业生产。

In this article, a brief description is given of the fundamental principles and technical flow line concerning the technology of electrostatic spraying with plastic powder. Some performances of the plastics commonly used in coating and the technical parameters of spraying as well as the preliminary applications of this technology in production are discussed.

本文简介了塑料粉末静电喷涂工艺的基本原理和工艺流程,并提供了一些常用于涂复的塑料的性能、喷涂工艺参数以及生产实践中的初步应用情况。

This paper presents a series of experimental results and discussions on the material behaviors, technical parameters and ceramic-disc characteristics of the piezoelectric transformer. Based on the analysis of scanning electronic mi- croscope and X-ray diffraction, the relations between physical properties and micro-structures of piezoelectric ceramics and the respective doping mechanism are studied, and as a consequence, several points of view are thus raised. Finally, the circuit for the piezoelectric...

This paper presents a series of experimental results and discussions on the material behaviors, technical parameters and ceramic-disc characteristics of the piezoelectric transformer. Based on the analysis of scanning electronic mi- croscope and X-ray diffraction, the relations between physical properties and micro-structures of piezoelectric ceramics and the respective doping mechanism are studied, and as a consequence, several points of view are thus raised. Finally, the circuit for the piezoelectric ceramic. transformers and their application are introduced briefly

本文对压电陶瓷变压器的材料性能,工艺参数和瓷片的特性进行了一系列试验与讨论。通过 电子扫描显微镜和X射线的分析,对压电陶瓷的物理性能和微观结构的关系,掺杂改性的机理提 出了一些看法。最后,对压电陶瓷变压器的电路和应用作了简要介绍。

 
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