本文通过选用十一种具有极性梯度的不同固定液，探讨桂皮酸顺反异构体硅烷醚衍生物分离与选择性分子间引力的关系，并从分子结构的角度来阐述选择相应固定液进行异构体分离的可能性。
It is proposed that selective intermolecular force can be used as a new parameter for; selecting stationary phase in order to separate the isomer but not the "polarity similarity principle".
由于尺度效应、表面效应等因素的影响，稀薄气体流动表现出自己的特点：流动涉及的表面积与体积之比增强、梯度参数效应，表面效应，流体极性等。
Some negligible factors in the classical fluid dynamics, such as, surface force, surface-volume ratio and the effects of gradient parameters, become very important for its study.
该产品的主要测试项目是本体配重及零位信号、零敏度、梯度及输出信号极性的检查等等。
This product is the main test project ontology counterweight and zero signal, zero sensitivity, gradient, and output signal of polarity of the check, etc.
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