双尖点

We study cuspidal loop bifurcation、 Homoclinic or double Homoclinic bifurcation、 Hopf bifurcation and obtain the necessary conditions to generate limit cycles by using the coefficients of the expansion of the first Melnikov function.

利用一阶Melnikov函数的展开式的系数研究了尖点环分支、同宿分支、双同宿分支和Hopf分支，并给出了产生极限环的充分条件。

The amount of track points, including the double cusp points, which could be mostly realized by this kind of synthetic problems, was analyzed.

分析了包括双尖点在内，该类综合问题最多能实现的轨迹点数目。

Basing on the positional characteristics of double cusp s produced in the track of link points of planar four-bar linkage and combining with the synthetic equation of conventional track generator,the constraint equation set for the position of track generator that could realize two cusp s;and by means of successive elimination to obtain the most simplified forms of constraint equation set.

基于平面四杆机构连杆点轨迹产生双尖点的位置特性，结合常规轨迹发生器综合方程，建立了能实现双尖点的轨迹发生器的位置约束方程组，并经过逐次消元，得到了约束方程组的最简形式。

Introduced is a kind of space uniform rational spline curve, which possesses tension parameters and is based on hyperbolic spline functions.

引入了基于双曲样条函数的、具有张力参数的空间有理等距节点样条参数曲线，给出了这种曲线在每个样条子区间上为挠曲线段的充分必要条件；分析了这种挠曲线段没有尖点、重结点和泛拐点的特性；因而在用于空间曲线几何造型时可避免奇异性。

Under the policy of discriminatory pricing, the catastrophic behavior of the transfer price is analyzed using hyperbolic umbilic catastrophe model.

在单一定价策略下，运用尖点突变模型研究了转移价格的突变行为；在差别定价策略下，运用双曲脐点突变模型研究了转移价格的突变行为。

Initially, he was drawn extremely obese with flabby jowls and small round eyes.

他有尖尖的耳朵，t字型的鼻头，上唇和双颊长着许多小麻点。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了