There is a good correlation in space and time between the above mentioned violent changes of sunspot morphology and the eruptions of solar flares.
黑子形态的上述剧烈变化与耀斑爆发在时间上和空间上有较好的相关性。
If the dimension of pattern space is too big, it would result in the difficulty on calculation, and confusing with the indetermination because of high correlation of many variables.
如果模式空间的维数较大，那么不仅会造成计算上的困难，而且由于不少变量之间往往相关程度高，会造成混淆和不确定性，所以需进行特征选择。
The strategy of nearest neighbourhood selection assures the grey correlation can search in a solution space which is fairly small but with optimal solution.
通过最近邻选择策略保证了灰关联方法可以在一个较小且包含最优解的解空间中进行搜索。
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