Marine diesel is simulated by the upper mass of the system. Proper positions of secondary vibration source are chosen and some points on the lower mass are chosen for error evaluation.

以双层隔振系统的上层质量来模拟柴油机，在下层质量上合理地布置次级振源，选取合适的误差评价点，针对这些点的振动响应实施控制。

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Based on rail features and metro drivers 'security evaluation, it can study from the source of safe operation. So it has practical meaning in processing management of rail Transit System Safety.

立足轨道交通特点和轨道交通司机安全行为的安全性评价模型，能够从安全作业的源头进行深入研究，对于轨道交通系统安全的过程管理具有很强的实际意义。

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The paper studies the measurement system and uncertainty. Based on the analysis of system and the source of error, the paper does the uncertainty evaluation and accuracy undertaking.

文章通过对测量系统及其不确定度的研究，分别基于测量系统分析和误差溯源对测量系统进行了不确定度评定和精度保证。

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