The decisionprinciple of mode number is: when the error of base shear and top displacement are both below 5%, the sum of modal participating mass ratio should exceed 90%;
Using the concept of the hyperspace measure, grey decisionprinciple is expanded to the optimization of monitoring spots in this paper. This method has been used in practice.
运用多维测度空间概念，拓广了灰色决策原理，使之适用于大气监测点的优选，并运用于实际工作之中。
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After analyzing a DwPTS searching algorithm, this paper proposed a novel DwPTS searching algorithm based on the mean power decisionprinciple. The algorithm is tested and emulated.