平方差公式（difference of two squares）是数学公式的一种，它属于乘法公式、因式分解及恒等式，被普遍使用。平方差指一个平方数或正方形，减去另一个平方数或正方形得来的乘法公式：a²-b²=(a+b)(a-b)
基于投影直方图的文档图像快速匹配研究 关键词：相似度度量；投影直方图；平方差；折半查找 [gap=962]Key words：similarity measurement；projection histogram；square error；binary search
基于36个网页-相关网页
平方差公式 Difference of Two Squares ; formula for the difference of squares
最小平方差 least square error
最小平方差模型 a least-squares model-based
离差平方和 Sum of squares ; sum of deviation square ; CSS ; sum of square of deviations
平方差算法 Square Difference
残差平方和 [数] Residual Sum of Squares ; SSE ; sum of squares for residuals ; Sum squared resid
加权平均方差 Weighted mean square ; MSWD
估计误差平方和 Estimated error sum of squares ; estimated erroe sum squares
平方误差积分准则 integral of squared error criterion
前言：目的：探讨两水平方差成份模型在评价调查者间变异的应用价值。
Objectives: To explore the applicability of two level variance component model in research on variability between interviewers.
以柔性机构的变形边界与目标边界间的最小平方差(LSE)为优化目标。
The objective for the optimization is to minimize the least square error (LSE) between the deformed boundary and the target boundary.
对于气井，在双对数坐标纸上绘出流量对平均储层压力与井筒压力平方差的关系图。
For a gas well the flow versus the difference of the squares of the average reservoir and wellbore pressures are plotted on log-log paper.
应用推荐