cuspidal quartic.
尖点四次线

trinodal quartic.
三结点四次线

tricuspidal quartic.
三尖点四次线

ternary quartic form.
三元四次型

quartic anharmonicity.
四次非谐势

quartic spline function.
四次样条函数

space quartic of first kind.
甲种四次挠线

The kink waves of a nonlinear quartic equation
一类非线性四阶方程的纽结波解

Qualitative Analysis on Diagram of a Class of Quartic Curves
一类四次曲线图形的定性分析

Classification on Phase Portraits of a Class of Quartic System
一类四次系统的相图

Parameterization of a Kind of Quartic Implicit Algebraic Surfaces
一类四次隐式代数曲面的参数化

Development of Quartic Group Demultiplexer for Digital Communication
数字通信四次群分接器的研制

QUARTIC CONVOLUTION INTERPOLATION AND ITS APPLICATION IN DIGITAL MAPS
四次卷积插值及其在数字地图中的应用

Bicircular quartic is a very important classics of higher plane curves.
重虚圆点四次曲线是很重要得一类高次平面曲线。

Study on Parametrization of A Kind of Quartic Implicit Algebraic Surface
一类四次隐式代数曲面参数化研究

The intersection of two right circular cylinders is usually quartic curve.
正交两圆柱的相贯线，一般是四次曲线。

THE GAP BREATHERS WITH QUARTIC ANHARMONICITY AND THE EFFECTS OF CUBIC ANHARMONICITY
四次非谐势下的能隙呼吸子和三次非谐势的影响

Hypergeometric Function Solutions of the Energy Levels for Quartic Anharmonic Oscillator
四次非谐振子能级的超几何函数解

This paper is concerned with the problem of quartic lacunary polynomial spline interpolation.
本文讨论四次缺插值多项式样条。

In this paper, the bifurcation of limit cycles for a quartic polynomial system is investigated.
摘要研究一类四次系统的极限环分枝问题。

Uniquness of limit cycle and structure of critical point at infinity for a class of quartic system
一类四次系统的极限环的唯一性和无穷远奇点的结构

The complete criterion of roots of quartic functions and the positive definite condition of a quartic function
四次函数实零点的完全判据和正定条件

The method of qualitative analysis of differential equation and bifurcation is employed to study two classes of quartic systems.
用微分方程定性分析方法和分支方法研究两类四次系统。