双时间(bitemporal)表支持在单个表中同时跟踪系统时间和业务时间，可以添加时间区间来表明起始和结束点。
Bitemporal tables allow you to track both system and business time in a single table, and time periods can be added to indicate start and end points.
第四章详细地讨论了利用区间双正交小波，根据小波分解和重构来提取图像的边缘特征的一种新方法。
The fourth chapter discusses in detail a novel method for edge feature detection of images based on wavelet decomposition and reconstruction by means of interval biorthogonal wavelet.
方法在双正态模型基础下应用ML估计方法计算ROC曲线下面积，正态近似法估计面积的可信区间及假设检验。
Methods On the basis of binormal model, maximum likelihood estimation was applied to areas calculation, and approximately normal method to confidence interval estimation and hypothesis test.
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