Secondly , the author analyzes adaptive encoding control algorithm , pack algorithm and feedback congestion control algorithm suited to mpeg - 4 video . taking into account the matching transport rate and bandwidth , the author gives an improvement and optimization of the feedback congestion control algorithm . finally , a feasible project of network visual telephone is designed 其次，在视频数据的传输码率与网络带宽的适应性方面，作者通过分析适用于mpeg - 4视频适应性编码的控制算法、视频数据打包算法和网络拥塞控制算法，提出了网络拥塞反馈控制算法的改进和优化思想。
Therefor whenever the flood was coming , it is very important that we were prepared to control flood at any moment and safeguard our lives and property and did our best to minimized the damage by some science means , the dss of controlling the flood this paper introduced ought to reflect flood disaster real - timely , list all feasible projects by referring to historic experiences and pre - making plans , find out the optimization of all projects by integrated evaluating for decision maker 因此，当洪水到来时，作好防洪准备，采取有效措施，随时保护人民的生命财产的安全，尽量把损失降低到最低程度，意义十分重大。防洪决策支持系统的建立，必须能为决策者展现洪灾实时的具体情况，参照历史经验和预先制定的防洪预案，列出适合当前洪水状态的全部防洪方案可行集，利用综合评价方法求出洪灾损失最小的最优防洪方案。
The thesis researches the inevitability to innovate the teacher evaluation on the basis of unscrambling the developmental teacher evaluation connotation and brings forward that establishing the concept of the developmental teacher evaluation is the ultimate choice in the teacher - evaluation reform in china , and presents the feasible project to carry out the developmental teacher evaluation 在解读发展性教师评价内涵的基础上，分析我国基础教育教师评价改革的历史必然性，指出确立发展性教师评价理念是我国中小学教师评价改革的根本走向，并从理论上构建了发展性教师评价理念实施的现实策略。
