这两种方法各有特点：频率域法的鲁棒性强，而空间域方法相对精确度更高。
Both types have their own advantages: frequency domain methods have strong robustness, while spatial domain methods have higher accuracy.
在我的案例中，因为我不能够用cookies或者页面跟踪代码去跟踪用户，所以相对而言，我的数据精确度比我期望的要差，这是因为日志文件分析方法的造成的。
In my case, I am not able to use cookies or page tags to track visitors, so my data is always going to be less accurate than it could be because of the way the log files are interpreted.
如前所述，使用XML数据库的价值(相对于CLOB或分割为关系数据)是改进性能，提高xml精确度，以及简化开发。
As described above, the value of using an XML database (as opposed to CLOBs or shredding into relational data) is increased performance, XML fidelity, and simplified development.
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