英语语法分析

The subproblem is solved by simulated annealing algorithm.

该子问题可通过模拟退火算法来解决。

Then with the analysis on the combination of each subproblem, a logic process for solving them is presented.

进一步分析了这两个问题的组合复杂性，提出了分层求解方案。

I had to define the task closure, determine appropriate task granularity, split the subproblem, combine the results, and so on.

我必须定义任务闭包、确定合适的任务粒度、分离子问题、综合结果，等等。