Regarding above 2 frequency division governor deflection, with the voltage and velocity modulation unifies to carry on supplementary, has analyzed the characteristic of the frequency conversion velocity modulation and the voltage and velocity modulation, it has realized the entire scope velocity modulation plan. 对于2分频以上的调速范围采用与调压调速相结合的方式进行互补,分析了变频调速与调压调速的特点,实现了全范围调速方案。
The thesis fell into three parts and the results were stated as follows: In the first part, an experiment was designed to study the effect of supplementary phospholipids and NSP enzyme on growth performance, carcass characteristic and feed costs in broilers. 论文分三个部分:试验一,研究了磷脂和NSP酶制剂对AA肉仔鸡生产性能、屠宰性能和饲料成本的影响。