通过定量计算油菜品种特征值与环境因子和生产需求之间的符合度，建立了适宜品种选择的量化知识模型。
By quantitatively calculating suitability of variety characters to environmental conditions and production requirements, a knowledge model for variety selection was established.
本文从选择诊断特征指标出发，探讨了利用散度指标建立齿轮故障诊断模糊判据的理论与方法。
The fuzzy threshold of gear faults for diagnosis is discussed in the paper based on mathematics. An example of creating the threshold using actual vibration signal is given for demonstration.
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