The hardware mainly includes light , image sensor , image collector . the improvement of hardware , which can realize gate control of the 9 cmos by the two - way communication with the computer , and can improve the mtf measurement accuracy of the whole field of view , is introduced in detail 硬件部分主要包括光源、图像传感器、图像采集设备等，并详细介绍了系统硬件的完善部分，即通过与计算机的双向通信，实现了9个cmos的选通控制，从而提高全视场mtf的测量精度。
Give education at traditional area relatively , long - range education has a few such striking features : during whole study , teachers and students allows permanent depart ; educational orgnaization or organization pass study data and support to serve two respects to bring to bear on to the student ' s study influence ; use all sorts of technologies to media contacts teachers and students and bear the weight of curricular content ; provide two - way communication communication ; during whole study , do not set study collective permanently definitely , the student basically is with individual chemistry be used to is given priority to 相对于传统的面授教育，远程教育有这样几个显著的特征：在整个学习期间，师生准永久性地分离；教育机构或组织通过学习材料和支持服务两方面对学生的学习施加影响；利用各种技术媒体联系师生并承载课程内容；提供双向通信交流；在整个学习期间，准永久性地不设学习集体，学生主要是以个别化学习为主。
The thesis deeply analyses and studies the issue of how to communication between com component and its clients in com model . component and its clients is communicated by interface . com mechanism shields its rock - bottom realization , provides a application communication platform , and realizes the two - way communication of component and its clients 本文主要针对com组件模型中客户与组件间如何通信这个问题进行了深入分析与研究，两者间以接口的形式通信，其通信机制屏蔽了底层的网络通信协议，提供了一个应用级的通信平台，可以很好的完成客户与com组件间的双向通信。
