The software part of reforming instrument was introduced, which includes measurement functional module, main menu block diagram and calculation flow diagram of roughness parameter.

主要介绍了改造仪器的软件部分，包括测量的功能模块、主菜单框图以及粗糙度参数的计算的流程图。

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Then the main chapter comes, which describes the frame of program play software, including play model, channel list receiving model, menu system model and the adaptive buffer control algorithm.

第三章是本文的重点，描述了数字视频终端中节目播放软件的框架结构及节目播放模块、频道列表接收模块、菜单框架模块和自适应缓冲控制算法的设计和实现。

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Then the main chapter comes, which describes the frame of program play software, including play model, channel list receiving model, menu system model and the adaptive buffer control algorithm.

第三章是本文的重点，描述了数字视频终端中节目播放软件的框架结构及节目播放模块、频道列表接收模块、菜单框架模块和自适应缓冲控制算法的设计和实现。

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