similarity reduction

The detailed content can be illustrated as follows. Firstly, already proposed dimensionality reduction cause unboundedness of searching space, so subsequence similarity search algorithm can not effectively filter the point in the index.

首先，原有降维技术造成序列数据搜索空间无界性，使得子序列相似查询算法在索引遍历时不能充分实现点过滤。

The smaller genetic similarity rate ( 0.6905) and bigger geneticdistance ( 0.3095) between two populations indicate that there is obvious genetic differentiation, which suggests that aquaculture has generated reduction in genetic diversity.

原种和良种两群体间遗传相似度和遗传距离分别是0.6905和0.3095。表明野生鳜具有较高的遗传多样性，养殖良种与野生群体间有明显遗传差异，人工选育对鳜遗传多样性造成显著影响。