In addition , a new improving genetic algorithm with the alterable intercross probability and mutation probability to optimize the parameters of hydro turbine governor is presented . the simulation result doesn " t suggest that it depend on the initial parameter value of the system and the searching efficiency can be ameliorated . at the same time , it has strong robustness and is an excellent pid optimization method 提出了一种可变交叉概率和变异概率的改进遗传算法进行调节参数优化的方法，仿真结果表明，该方法有效地消除了对参数初值的依赖性，使得寻优效率大大提高，同时具有很强的鲁棒性，是一种较好的pid参数寻优方法。
We adopt the latest gray scale image correction technology and preset abundant adjusting parameters according to x - ray image demand , thus the corrected roc curve accords with the film ; its light characteristic totally meets dicom . image layer is rich , natural and detailed , and the phenomenon of black edge is basically eliminated 采用最新的灰阶影像调校技术，针对xray的图像要求预设了丰富的调节参数，能够使图像质量高层次丰富自然细节完整，基本消除了一般图像增强中的黑边现象。
We have established an exact mathematics model , and analyzed the adjustable parameters of pneumatic servo system theoretically , at the same time , we have putted forward a special programmable structure and method , and provided theoretic gist for the development of pneumatic digital servo robot 建立了较准确的气动数字伺服缸的数学模型，并对气动伺服系统的调节参数进行了理论分析，提出了一种可以节省可编程控制器空间的特殊程序结构和编程方法，为气动数字伺服机器人的发展提供了理论依据。
