In the paper, it provides the geometricalsolution to extreme value of many variables function by geometric properties of objective function or constraint condition.
本文中，利用目标函数或约束条件的几何性质，提供了某些多元函数极值或最值问题的几何解法。
2
Geometrical model is a kind of solution model that has been used extensively in predicting thermodynamic properties and calculating phase diagrams for ternary and multicomponent systems.
由二元系估算二元系和多元系的几何模型是当今在热力学和相图计算中用得最为广泛的一种溶液模型。
3
Then, the analytic solution of the geometrical nonlinear vibration system and the frequency-response properties of the actuator were analyzed by using multi-scale method.