判定系数（coefficient of determination），也叫可决系数或决定系数，是指在线性回归中，回归平方和与总离差平方和之比值，其数值等于相关系数的平方。它是对估计的回归方程拟合优度的度量。为说明它的含义，需要对因变量y取值的变差进行研究。
判定系数 coefficient of determination ; Adjusted R Square ; R Square ; adjusted multiple coefficient of determination
复判定系数 Coefficient of Multiple Determination ; Multiple coefficient of determination
非判定系数 coefficient of non-determination
调整的判定系数 Adjusted R Square ; r-sq
样本判定系数 Determinants of coefficient ; Sample coefficient of determination
调整后的判定系数 Adjusted coefficient of determination
总判定系数 coefficient of total determination
母体判定系数 Population coefficient of determination
样本多元判定系数 Sample coefficient of multiple determination
母体多元判定系数 Population coefficient of multiple determination
数值模拟的结果表明：用柔度曲率幅值突变系数法可以对钢桁架结构单个或多个结构同时出现的情况进行比较准确的判定。
The results of the simulation indicate that using the method of the sudden change coefficient of flexibility curvature, the single or multi damage of the steel truss were tested more precisely.
使用Kappa系数判定研究者之间在CT扫描前后对于这些分型系统的可信度。
The Kappa coefficient was used to determine interobserver reliability of these classification systems before and after CT scan.
根据整数DCT变换和量化的特性，通过提前判定全零系数块来终止没有意义的运动搜索过程。
According to the characteristics of integer discrete cosine transformation(DCT) and quantization, the coefficient-all-zero block was determined in advance to terminate meaningless search.
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