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移相式激光偏振仪的原理及误差分析 被引量:5
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作者 高宏 李庆祥 +1 位作者 薛实福 马东海 《仪器仪表学报》 EI CAS CSCD 北大核心 1992年第3期240-245,共6页
本文介绍了移相式激光偏振仪的原理及误差分析。在塞纳蒙补偿器系统中,通过改变检偏器方位角对输出光强进行移相,然后测量输出光强并作傅立叶分析,就可精确获得被测件的相位延迟量。
关键词 激光偏振 原理 误差 分析 移相式
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光驱为什么不读盘
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作者 李莹 《电脑知识与技术(过刊)》 1999年第5期15-16,共2页
凭心而论,本人对光驱的寿命没有一点把握.本人曾经在两年前开始陆续使用五台光驱,大约半年之后都出现过不读盘的现象,侥幸的是经过本人大胆维修后,至今仍有四台可正常工作.下面是本人总结的光驱故障原因及其简单的处理方法.
关键词 光盘驱动器 激光义 IDE接口 故障 维修
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A Defined Process to Digitally Reproduce in 3D a Wide Set of Archaeological Artifacts for Virtual Investigation and Display
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作者 Grazia Tucci Daniela Cini Alessia Nobile 《Journal of Earth Science and Engineering》 2012年第2期118-131,共14页
This paper contributes to depict the current pattern of applications of digital 3D models for professional research and practice, and for broader dissemination of cultural heritage. Passing from a general review to th... This paper contributes to depict the current pattern of applications of digital 3D models for professional research and practice, and for broader dissemination of cultural heritage. Passing from a general review to the illustration of the background project, named MUSINT, the authors underline the objectives. The present case study primarily aims to share information about valuable archaeological collections which have little visibility. To enhance the project's contents, which include a whole set of different artifacts, the authors have reproduced high resolution, faithful and measurable digital models on one side, and on the other, lower resolution and geometrically simplified models are yet completed and very close to reality. The former are meant to implement a scholars' archive for further scientific activity. The latter to provide content for virtual exhibitions on the Web or on stand-alone interfaces situated in the actual physical museum spaces. The data acquisition and post-processing methods which have been tested and chosen are here briefly described. Hence, the authors then give an account of the most recurrent problematic issues of the established work-flow and how they should be solved. Touched instances are the delicate placing of the artifacts, which must be digitized, in relation to the triangulation-based laser scanner's functionality, the refining operations in order to build a coherent single polygon mesh, the most effective ways to deal with unavoidable missing parts or defected textures in the generated model and so on. 展开更多
关键词 Cultural heritage ARCHAEOLOGY laser scanning NextEngine ACQUISITION processing protocol virtual museum.
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