To achieve high performance, flexibility, relevance ranking, and so on, some search engines connect to databases directly, extract data, and generate indexes from databases.

为实现高性能、灵活性以及相关排序等，一些搜索引擎与数据库直接相连，从数据库提取数据并生成索引。

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Without any spectral peak search and parameters pairing, the resulting method is computationally efficient with high resolution and small variance, even in the short data length.

此方法回避了多维谱峰搜索和参数配对，克服了在短数据时离散傅立叶变换测频分辨率低和性能差的不足。

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The study of high dimensional data index method is the key problem of content based search in large scale multimedia databases.

在大规模多媒体数据库中进行基于内容的检索，高维数据索引结构的研究是重要问题。

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