为返回数据源中与查询目标节点相似的节点，首先提取出数据源中长度在固定范围内的所有路径，然后利用关系数据库系统将其与查询路径进行相似性连接，并按相似度从大到小返回所有结果。
To get the source nodes similar to the target query node, firstly the paths whose lengths were within an interval were extracted from the data source, then a similarity join process between them and.
对于盲源分离的两个固有不确定性问题，引入波形相似度的概念，使问题得到解决。
Introduce the concept of waveform similarity to deal with the two two inherent uncertainties of Blind Source Separation.
从人的视觉特性，这一措施评估的梯度场的源图像和融合图像之间的相似度。
From human visual features, this measure evaluates the similarity of the gradient fields between the source image and fused image.
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