cubic plane

Topological Classifications of Global Structures and Their Coefficient Conditions for Homogeneous Cubic System in the Plane with Common Factor

具有公因式的平面齐三次系统全局结构的拓扑分类及系数条件

The pencil of plane quadratic lines is the foundation for studying plane cubic curve and hig-her plane curves.

平面二次线束是研究平面三次代数曲线和高次曲线的基础。

Abstract In this paper, the global topological classifications for homogeneous cubic system in the plane with common factor are discussed, and their coefficient conditions are given.

讨论了具有公因式的平面齐三次系统全局结构的拓扑分类，并给出了它们的系数条件。

On the distribution of finity critical points of bounded cubic systems in the plane

平面有界三次系统有限奇点分布举例

The mean simulation precision of cubic tendency plane model is 93 01%, while the mean forecast precision of 20 groups of sample prepared in advance is 93 24%.

而三次趋势面模型的平均模拟精度为93.01%，预留的20组样本的平均预测精度为93.24%。

Design of the fifth cubic plane landscape in residential areas in city

浅谈城市住区第五立面景观设计

By structure the bounded cubic systems in the plane, we prove that: 1) the system ( 1) have distribution of critical point with 5-4 ( 5 critical points with index+ 1 and 4 critical points with index-1), 3-2,2-1,+ 1;

通过构造有界的平面三次系统，证实了（1）其有限奇点的5-4（5个奇点指标为+1，另4个奇点指标为-1）、3-2、2-1、+1四种分布均可实现；