基于设计半径已知条件，利用半径约束最小二乘法提高测量精度。
Besides, the radius precision is accomplished by least square method with radius constraint.
然后利用约束最小二乘法确定不同应力下的裂纹扩展参数和通用EIFS分布上限。
Then, the generic upper limit of EIFS distribution and crack growth parameter under different stress levels are estimated with constrained least squares fitness.
基于图象中纹理的预知性，应用最小二乘法及必要的约束条件推导出了该种滤波器。
Based on preknowledge of texture in an image, by using least squares defintion and with needed constraint, the filters are derived.
基于图象中纹理的预知性，应用最小二乘法及必要的约束条件推导出了该种滤波器。
Based on preknowledge of texture in an image, by using least squares defintion and with needed constraint, the filters are derived.
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