Aim to describe accumulating frames characteristics of CCD camera as a night vision detector.
目的研究CCD摄像机作为微光夜视探测器的帧累积特性。
The characteristics of coal accumulating, lithology, composition of lithofacies and its spacial combination are all controlled by sedimentary environment.
聚煤特征、含煤岩系的岩性、岩相组成及其空间组合均受控于沉积环境。
Objective To investigate the clinical characteristics of aortic dissection, for accumulating clinical experience and improving their treatment.
目的探讨主动脉夹层的临床特征，以积累经验，提高诊治率。
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