The comparison experiment shows that the coding quality of a symmetric expansion of images is better than that of an asymmetric expansion of images.
对比实验表明，图像的对称展开的编码质量比图像的非对称展开的编码质量好。
This paper expounds a theory of processing the cam outline curve by the expansion method, and also introduces its application to symmetric the cam outline curve.
详细论述了“展成法”加工凸轮轮廓曲线的原理； 介绍了这种方法在对称凸轮轮廓曲线加工中的应用。
By using the fixed-point theorem of cone expansion-compression type with norm, we study the existence of positive pseudo-symmetric solutions to a four-point boundary value problem.
利用范数形式的锥拉伸与压缩不动点定理，研究了一类四点边值问题拟对称正解的存在性。
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