尖点

With a mouthful of three-pointed teeth, the frilled shark may be a fearsome hunter, but it's considered harmless to humans.

有个一张满嘴三尖点牙齿的嘴皱鳃鲨，可能是个可怕的猎人，但它被视为对人类无害。

Sand threshold;cusp catastrophe;critical friction velocity;Shields parameter;particle Reynold number

风沙起动；尖点突变；临界起动摩阻风速；希尔兹参数；颗粒雷诺数

Spherical four bar mechanism ; Cusped coupler curve ; Spherical Burmester curve ; Instantaneous center

Keywords：球面四杆机构；尖点耦杆曲线；球面布氏曲线；瞬心

The central peaks of several craters on the flanks of Syrtis Major are made up of an even more silica-rich rock, granite, that may have formed by extreme crystal separation or by large-scale remelting of earlier basalts.

在大三角侧面，几个火山口的中间尖点是由一种矽含量更高的岩石──花岗岩所构成，可能是经极度晶体分化，或早期玄武岩大範围重新熔融而形成。

This example is carried through equation transformation, whose last expression is compared with potential function of cusp catastrophe model.

概述了突变理论的几种简单突变模型，通过举例进行方程转化并利用尖点突变模型，对系统进行了脆性分析

The lotus leaf just sprouting, with the volume, and then flying a Dragonfly, I can not help methotrexate Road "Lu Xiao-he only sharp angle, as early as the dragonfly above legislation," Dragonfly afterpeak point a bit with water, gently float to the surface-wave microwave scale, Dragonfly is quietly stopped on a lotus leaf.

哟，快看！那个荷叶刚发芽，卷在一起了，这时飞来了一只蜻蜒，我不禁呤道&小荷才露尖尖角，早蜻蜓立上头&，蜻蜒用尾尖点了一下水面，微波轻轻地泛起波鳞，蜻蜒则悄然停在了荷叶上。

"In LIS, only patients with thoracic apices and curves of more than 100 degrees are at increased risk of death from cor pulmonale and right ventricular failure," the authors write.

在晚发作型原发性脊椎侧弯的病程中，只有侧弯角度大於100度且有胸廓尖点才会增加因肺心症或右心室衰竭致死的机率。

"In LIS, only patients with thoracic apices and curves of more than 100 degrees are at increased risk of death from cor pulmonale and right ventricular failure," the authors write.

在晚发作型原发性脊椎侧弯的病程中，只有侧弯角度大于100度且有胸廓尖点才会增加因肺心症或右心室衰竭致死的机率。

The technical characteristics of the invention is that: the rotor end face tooth profile contains four, five or six sections of tooth curves with the circular nature; when it has five sections, addendum circular arcs and dedendum circles are added to the addendum or the dedendum of the rotor; when it has six sections, both the addendum circular arcs and the dedendum circles are added to the addendum and the dedendum of the rotor at the same time, to form four different combination schemes; there are common tangents at the connection points of the two adjacent teeth forming curves, which has a smooth tooth-profile without cusp, a high-wearing feature, a long life of the rotor, a small leakage triangle, and a good sealing property.

本发明的技术特征是：转子端面齿型是包含四段、五段或六段圆弧性质的齿曲线；当为五段时，在转子的齿顶或齿根加上齿顶圆弧或齿根圆弧，当为六段时，在转子的齿顶和齿根同时加上齿顶圆弧和齿根圆弧，形成四种不同的齿型组合方案；相邻的两组成齿曲线的连接点处具有公切线，齿型光滑，没有尖点，耐磨性好，转子的使用寿命长，泄漏三角形小，密封性好。

In this model, the monitored acoustic emission information is changed into prediction data based on the gray theory, and the Prediction data are trans-formed into an essential format of cusp catastrophic model via the least-square principle curve fitting and the differential coefficient homeomorphous change.

首先运用灰色理论对声发射监测数据进行处理，得到预测数据，运用最小二乘曲线拟合展开，再通过微分同胚变换，转换为尖点突变模型的基本形式，从而建立了灰色突变预测模型。

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