non linearity meaning in English

非线性
非直线性

Now , we adopt the centrifugal separation to do with it , which is often a typical and complex industrial process because of the characteristics of non linearity , interactions between process variables and the lack of knowledge concerning their control , especially foundation of the relevant formulation of precise mathematics model
许多技术方法用于固液分离( sls )过程，但黄河泥沙分离过程作为典型的复杂工业过程，至今没有一套完整有效的分离方法。此分离过程具有非线性、大时滞、时变、干扰大特点无法建构精确的数学模型。