The influences of catalyst, solvent, temperature and raw material on the yield of TPP are investigated. The yield of TPP increases from 30.0% to 49.5%.

研究了催化剂、溶剂、温度、原料等因素对四苯基卟啉收率的影响，收率由30.0％提高到49.5％。

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Transportation scheduling system of a cement raw material quarry is a complicated system involved with the yield, quality and transportation cost of raw limestone.

水泥原料矿山运输调度系统是一个涉及到产量、质量、成本的复杂系统。

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The concepts of raw material utilization ratio, product yield ratio, product qualification ratio as well as the importance for the enterprise are discussed.

本文阐述了肉制品生产中原料利用率、产品出品率和产品合格率的概念及其在企业中的重要性。

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