Based on shape optimization, we use second optimization technology to optimize structure section size.
在形状优化的基础上，采用二次优化技术，对结构的截面尺寸进行了优化。
The model is used to optimize the spatial structure of land use of a city.
应用该模型对某城市的城市土地利用空间结构进行了优化配置。
The fourth part: Way to optimize the structure of classroom instruction of Chinese.
第四部分：优化语文课堂教学结构的途径。
Therefore, it is necessary to optimize the design plan of structure.
因此，对结构设计方案进行优化设计是必要的。
Second is to optimize expenditure structure;
二是优化支出结构；
Second is to optimize expenditure structure;
二是优化支出结构；
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