This dissertation starts with the classification of familiar tools in assembly procedure and studies the construction and management of tool library with hierarchical structure in virtual environment.
本文从装配和拆卸过程中常用的装拆工具分类入手，对虚拟环境下具有层次结构的装拆工具库构建、管理进行了研究。
RESULTS: We present a semi-automatic procedure for deriving a novel hierarchical classification of protein domain structures (CATH).
结果：我们提出了一个半自动的程序用于获得蛋白质域结构的一个新的层次分类(CATH)。
RESULTS: We present a semi-automatic procedure for deriving a novel hierarchical classification of protein domain structures (CATH).
结果：我们提出了一个半自动的程序用于获得蛋白质域结构的一个新的层次分类(CATH)。
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