在确定优化参数和约束方程的基础上，借助线性规划模型进行福建省耕地利用结构优化。
Based on the determination of optimizing parameters and boundary equations, the cropland using structure in Fujian Province was optimized by the model of linear programming.
选取结构的任一个循环对称扇区作为有限元计算模型，建立单个扇区复约束特征值方程；
The presented method selects only one cyclic symmetric sector of the structure as the finite element calculating model and establishes the complex constrained eigenvalue equation of the sector.
以位置约束方程奇异性条件和结构参数空间复形剖分方法为基础，研究了平面机构尺度分类问题。
Based on singularity of constraint equation and complex division of structure-parameter-space, the dimension classification method of planar mechanism was researched.
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