利用单体竞聚率差别，用一次投料法合成梯度共聚物。
The gradient copolymers could be obtained due to the difference of reactivity ratios of the two monomers.
我们也知道了，如何将各个偏导组合成一个梯度向量。
And we have learned how to package partial derivatives into a vector, the gradient vector.
多热源合成碳化硅炉炉内温度分布、热量传递及温度梯度变化对碳化硅产品的产量、质量和能耗都有重要的影响。
The temperature distribution, heat-transfer and temperature gradient change have vital influence on yield, quality and energy-cost of SiC product in multi-heat sources synthesis SiC furnaces.
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