The methods for speed identification based on kalman filter and model reference adaptive system are deeply investigated in this thesis , a new pi adaptive method of speed identification based on mras is put forward 本文研究了基于卡尔曼滤波算法的速度辨识法和基于异步电机模型的模型参考自适应法，针对模型参考自适应法提出了一种pi自适应速度辨识法。
Tests on a few man - made and real data sets showed that , without greatly affecting its computational efficiency , the new algorithm have better generalization performance over ripper algorithm on data sets lack of negative examples 通过在多组人造及实际数据集上同ripper算法的对比实验，证明该算法对于反例缺乏的数据集，在没有明显影响算法的速度的前提下，仍然具有较强的归纳能力。
A fast and real - time algorithm to obtain some vectors of the projection matrix is proposed in this dissertation to solve the conflict of time cost by matrix obtainment and memory occupied by matrix , and speed the iterative algorithm 作者根据扇形扫描几何的对称性和重叠性，提出了一种快速实时获取投影矩阵分量的方法，较好地解决了获取投影矩阵所需速度和存放其所占内存空间的矛盾，提高了迭代重建算法的速度。
Introduce the algorithm of attribute reduction based on discernibility matrix and through analyzing to find the shortage , and then present an improved algorithm . the heuristic reduction algorithm based on the feature weight is more natural and easier in computation and improves the reduction algorithm in speed 将启发性知识结合区分矩阵,提出了基于属性特征权值的区分矩阵的启发式约简算法,较以往的算法意义更加直观,计算也更加简单,提高了约简算法的速度。
The fixed - point dsp program is given which are based on the analysis in the feather of the video signal and the 16 - bit fixed - point dsp - - tms320c5402 . at last , the result and quantity of calculation are analyzed to prove that the speed and precision of calculation are matched to the system requirement 在深入分析了线性调频脉冲压缩信号产生过程和特性的基础上，结合16位定点dsp ? ? tms320c5402的硬件结构和指令系统的特点，编写了定点dsp程序，并对程序的计算量和计算结果进行了分析，表明算法的速度和精度都可以满足系统的要求。
Secondly , we get two new reduction algorithms . the heuristic reduction algorithm based on the relative significance in information system is more natural and easier in computation and improves the reduction algorithm in speed . the conversional algorithm of the decision table based on the lower approximation reduction theory translate the relative reduction of the decision table into the reduction of the information system and offer a new method to find relative reduction of the decision table 信息系统中一种基于属性相对重要度的启发式约简算法较以往的算法意义更加直观，计算也更加简单，提高了约简算法的速度；基于下近似约简理论的决策表转化算法通过定义一个信息系统的下近似约简，将对决策表求相对约简转化为对信息系统求约简，得到了一种求决策表相对约简的新方法。
