本文应用数学机械化方法和计算机符号处理技术，对平面四杆机构刚体导引综合问题进行了符号求解。
By the use of mathematic mechanized method and computer symbolic manipulating technique this paper carried out a symbolic solution on the synthetic problems of rigid body guided four bar linkages.
作为二维条码的一种，矩阵式的二维条码是建立在计算机图像处理技术、组合编码原理等基础上的一种图形符号自动识读处理码制。
Based on digital image processing and combined coding theory, two-dimensional matrix bar code is a symbol system processed automatically using image recognition technology.
版面分析与理解技术主要研究如何将纸质文档转化为电子表示，并进一步理解为计算机可处理的符号表示的整个过程。
Document analysis and understanding is to research into theories and technologies during the whole procedure converting paper documents into electronic formats.
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