在分形编码过程中，搜索值域块的最佳匹配的定义域块的计算量最大。
The searching computation of the best matched domain block is most heavy in the fractal encoding process.
前者通过程序搜索最佳，后者根据振动控制理论和工程上的经验以及工程实际的需要来综合考虑。
The former is taken by the program seeking, the latter is considered with the theory of vibrancy control and experience and the actual require.
优化是从大量的、甚至无穷的可能解中搜索最佳方案的过程。
Optimisation is the process of searching for the best solution from among a large or even infinite number of possible solutions.
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