The air filter element should be replaced after cleaning 3 times, and the cleaning cycle can be determined by the air quality of the usual control area.

空气滤芯通常在清洁3次后就应替换新的，清洁周期能够由平时驾驭区域的空气质量而定。

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An "Exponent Function Control Method" which ADAPTS to discretization of the space surrounding bus body is presented to advance the quality of the element generation.

为提高单元划分质量，提出适合客车车身周围空间单元划分的“指数密度控制方法”。

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Each step about data which are collected, reported and manipulated has an error rate associated with it. Therefore, measuring data quality is a key element of quality control for clinical trial data.

临床试验数据的采集、报告与处理的每一步骤都可能伴随错误，临床试验数据质量的评估是临床试验质量控制的重要措施。

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