difference quotient meaning in English

差分商
差商
均差

Relative difference quotient algorithm is strong in local search , while genetic algorithm with a parallel operation is highly effective in global search
相对差商算法局部搜索能力强，而遗传算法具有较强的全局搜索性，发挥两者的优势，提出组合遗传算法。
Generating original population via the ergodicity of chaotic sequence , the optimized results generated from relative difference quotient algorithm are added to the original population to improve its performance
利用混沌序列的随机遍历性生成初始种群，并把相对差商算法的优化解加入到初始种群中，改善初始种群的性能。