The methods were realized directly inversion of the possion ' s ratio from cdp gather and gas - bearing identify . by applied the late theory of avo technology , after inputting the p wave section and s wave section , the p wave and s wave impedance were obtained by applying simulate anneal inversion and used the log as a constrain condition , eventually , obtain the elastic parameter u and x by p and s impedance . then , the gas - bearing will be identified by u and x . by applying this method , the avo combination inversion of prestack and post were realized 利用上述的反演方法实现了泊松比从道集的直接反演，利用加权叠加技术实现了含油气的识别，并利用当今avo研究的最新成果，以加权叠加技术分离出的p波和s波剖面作为输入，在测井的约束下，采用模拟退火方法分别进行p波和s波波阻抗反演，通过p波和s波波阻抗来求取弹性参数和，再通过和的联合解释来进行含油气的判别，实现了avo的叠前叠后的联合反演。
Related theories of network optimization are summarized . optimal methods used in traffic engineering and constrained - routes are stated . according to the object - function , decision variables and constraining conditions several types of optimal problems and solutions are proposed 本文还概括了网络优化的相关理论，阐述了可用于流量工程和基于约束路由的优化方法，按照目标函数、决策变量和约束条件分类，提出了几种不同类型的优化问题及解决方法，就典型的网络优化问题进行了归纳总结。
