To pursue the proper length ratio range of the mechanism, an optimization design mathematic model is made and an example is taken to prove the feasibility of the model.

为了寻求合理的进给机构杆长比范围，建立了优化设计数学模型，并通过实例验证了该模型的可行性。

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The optical parameters of grating and intensity ratio among three beams in interferometer are derived from the view of optimization design.

从优化设计的角度求出了光栅的最佳参数以及干涉仪三束光的最佳光强之比；

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In the transformation and optimization of ring cooler, the air leakage ratio is an important index for the design department and quality technology department.

在对环式冷却机的改造和优化设计过程中，漏风率也是设计部门和质量技术部门参考的一项重要指标。

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