非线性网络分析起来比线性网络困难得多，因为一般的方法均不能用来解这些非线性网络。
Nonlinear networks are much more difficult to analyze than linear networks, for no general method can be used for their solution.
电力系统机组组合问题是一个典型的大规模混合整数的非线性组合优化问题，很难得到理论上的最优解。
Power system unit commitment, a problem of nonlinear commitment optimization with typical large-scale hybrid integers, is difficult to get an optimal solution in theory.
由于非饱和流动的数学模型归结为非线性的偏微分方程，除了一些很特殊的情况外，很难得到解析解。
It is very difficult to get analytic solution except some very specific cases for the model owing to nonlinear partial differential equation.
你们负责处理的将是过去智慧而富有的人们绞尽脑汁而难得其解的重大问题。
You are in charge of handling will be past wisdom and rich people rack one's brains and god-given the major problem that its solve.
三维弹性问题的解析解是很难得到的。
Analytical solutions for three dimensional elasticity problems are quite difficult to obtain.
容量受限的工厂选址问题属于NP难题，较难得到最优解和满意解。
The Capacitated Plant Location Problem (CPLP) is a NP problem and hard to get an optimal and satisfactory solution.
容量受限的工厂选址问题属于NP难题，较难得到最优解和满意解。
The Capacitated Plant Location Problem (CPLP) is a NP problem and hard to get an optimal and satisfactory solution.
应用推荐