According to the fusion levels, there are data level, feature level, decision level included in data fusion.

从融合的层次结构出发，数据融合技术可分为数据级、特征级和决策级三个融合层次。

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The patients were matched according to age at surgery, operative method, curve location, number of fusion levels, and degree of curves.

病人根据手术时年龄，手术方法，侧弯定位，融合阶段的数目，侧弯角度配对。

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During the diagnostic workup, all patients had undergone provocative discography that included the assessment of the discs adjacent to the intended fusion levels.

诊断治疗过程中，对所有病人进行诱发性椎间盘造影，其中包括评价预备融合节段的临近间盘。

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