嵌入式系统以应用为中心，强调体积和功能的可裁减性，是以完成控制、监视等功能为目标的专用系统；
The embedded system, as the center of the application and emphasizing the reducibleness of the bulk and functions, is the special system which finishes the function of controlling or stakeout.
以密钥管理在校园一卡通系统中的应用为中心，研究密钥管理系统在一卡通系统中的具体应用模式，并在校园一卡通项目中实现了密钥管理。
Through an application example of key management system in campus ECard system, this paper studies the specific application mode, and the key management has been used in campus ECard project.
本文以液体透镜技术及其在微型变焦距系统中的应用为中心展开研究。
The liquid lens technology and its application in the micro zoom system were discussed in this dissertation.
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