The difference between the physical system and the mathematical model arises from many sources, including parameter changes, un-modeled time-delays, and so on.

系列简化和假设导致实际物理系统和数学模型之间的差异，主要包括有系统参数变动，未建模动态特性，未建模时滞等等。

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We simulate real extraction process in the laboratory (including various of abnormal conditions) and set up on-line testing model according to each process parameter index content changes feedback.

由实验室模拟真实提取过程(含各种异常情况)，根据各过程参数反馈指标成分的含量变化，建立在线检测模型。

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