为准确测量物体的突变形面，通常采用一种双频变精度方法。
A dual frequency measurement method with variable precision was used to measure object shapes with sudden surface changes.
第四章作者讨论了将变精度方法引入到模糊粗糙集，给出了一个变精度模糊粗糙集模型。
The forth chapter is to try to introduce the variable precision methods into the fuzzy information processing.
识别结果表明，约束变尺度方法不仅具有较高的计算精度和良好的数值稳定性，并且具有一定的抑制数据噪音的能力。
The results showed that the restraint variable-dimension method not only could have high calculation accuracy and good numeric stability but also have certain data noise control capability.
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