抛物线

Many horses Products: Bits; reamer; countersink drilling / reaming drill; tap; carbide thread milling cutter; cutter; die; white steel universal and dedicated to a workpiece material twist drill; Drilling holes or drilling and tapping Shen composite tool; Center drill and drill centering; high-performance ADX and CDX high-speed steel drill bits carbide drill bits (both outside the convex cutting edge, high efficiency, easy to chip-breaker); Deep-hole Drill the parabolic trough PFX; have "self-thinning thick heart," the characteristics of taper shank twist drill the first A030 (drilled shafts designed to take into account the characteristics of the cardiac thick thinning, re-mill grinding, when no longer horizontal edge); VANGARD Series and SHARK Series high-performance machine tap; particularly suitable for machining aluminum, aluminum alloy, stainless steel and ductile extrusion tap; a variety of rough-cut and fine cut Endmill; Solid Carbide Thread milling cutter and the tap; with TiAIN coating cutting tool used to do: and so on.

钻头；铰刀；锪钻/扩孔钻；丝锥；硬质合金螺纹铣刀；铣刀；板牙；白钢刀通用性的和专用于某种工件材料的麻花钻；钻削和沉孔或钻孔攻丝复合刀具；中心钻和定心钻；高性能的ADX高速钢钻头和CDX硬质合金钻头（均有外凸形切削刃，效率高、易断屑）；PFX抛物线槽形深孔钻头；有"自我心厚减薄"特点的锥柄麻花钻头A030（钻槽设计中考虑了心厚减薄特点，重磨时不需再修磨横刃）；VANGARD系列和SHARK系列高性能机用丝锥；特别适合于加工铝件、铝合金、韧性钢和不锈钢的挤压丝锥；各种粗切和精切立铣刀；整体硬质合金螺纹铣刀和丝锥；带TiAIN涂层的用于干切削的刀具：等等。

In this area, the peak temperature is relatively low, commonly about 600-650℃, which doesn't reach the condition of high temperature amphibolite facies.

阿尔泰造山带各地区较高等变带的PTt轨迹均为顺时针，具有中等坡度的抛物线样式。

On the basis of analytic geometry, the projection curve types of intersection lines of cone and cylikder, cone and cone on V plane is hyperbola and cone and sphere is parabola.

基于锥与圆柱、圆锥、圆球正贯时，相贯线V 面投影为双曲线和抛物线，且X 向极值点所在高度只与柱、锥轴线、球心距离锥顶高度和立锥锥顶角有关，而与它们的直径无关，给出了求该极值点的作图方法。

Movement trajectories of electrons under complex field and state parameters when electrons return to the dielectric surface are obtained by simulation,such as impact energy and return time. Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron,and there is an emergence angle in which the electron has the maximum trajectory length and impact energy.

研究发现：电子出射角度对其运动状态有显著影响，电子存在运动轨迹最大的某一出射角度，该角度下电子拥有最大的撞击能量；微波电场幅值的增加将使电子撞击能量增加，返回时间减小，微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡，这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因；随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron, and there is an emergence angle in which the electron has the maximum trajectory length and impact energy, Impact energy will increase and return time will reduce as increasing the amplitude of electric field, and both parameter would oscillate with the phase of electric field, which can essentially explain that multipactoring electron number oscillates in twice the frequency with the increase of microwave frequency, electron trajectory will change from parabolic-like movement to complex oscillation.

研究发现：电子出射角度对其运动状态有显著影响，电子存在运动轨迹最大的某一出射角度，该角度下电子拥有最大的撞击能量；微波电场幅值的增加将使电子撞击能量增加，返回时间减小，微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡，这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因；随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

The slow sodium influx educed by veratridine and the calcium-dependent potassium outflux are regarded as the two slow variables, which are responsible for the parabolic bursting.

结合实验模型，从离子通道活动的角度揭示了抛物线簇放电发生的生物物理机制。由藜芦碱诱发的慢变钠内流和钙依赖钾外流被认为是引发实验所观察到的抛物线簇放电的两个慢变量。

The objective was to analyze allelopathic effect of oxygenic terpenoid on barnyardgrass. The results show that the main effects ofCarveol,Carvone,Menthone andCarvyl acetate have an downward parabolic curve, whileCedrol shows the opposite.

各单因子的主效应分析结果表明：香芹醇、香芹酮、薄荷酮和香芹基乙酸酯的主效应曲线均为开口向下的抛物线，而雪松醇为开口向上的抛物线。

The results showed that the developmental threshold of egg, larva and immature periods was 12.67, 13.86 and 13.53℃, respectively. It revealed parabola relationship between temperature and both generation survival and finite increase rates. According to the corresponding parabola functions, the optimal temperature for survival and population increase was 30.2 and 33.7℃, respectively, and the optimal temperature range for growth and development of C. maculates was between 30 and 34℃.

结果表明：四纹豆象卵期、豆内幼虫及蛹期、未成熟期发育点温度分别为12.67，13.86和13.53℃；温度与世代存活率及周限增长率均呈二次抛物线关系，根据相应抛物线方程可知，四纹豆象理论最适生存温度和最适种群增长温度分别为30.2℃和33.7℃，其生长发育繁殖的最适温区为30～34℃。

This text develops the tool and dialog box DCL languages to carry on the simple introduction to the AutoCAD two times, integrated the process to carry on the detailed introduction to the Visual Lisp and dialog box DCL language, and make use of the whole process that the Visual Lisp integrates with the dialog box DCL language the realization manufacture parabola, carrying on the detailed analysis to the concrete step, putting forward the basic design way of thinking, the end give make use of the living solid example of severals of the parabola.

本文对AutoCAD的二次开发工具和对话框DCL语言进行了简单的介绍，对 Visual Lisp与对话框DCL语言整合过程进行了详细的介绍，并利用Visual Lisp与对话框DCL语言整合实现制作抛物线的全过程，对具体的步骤进行了详尽的分析，提出了基本的设计思路，最后给出了利用抛物线的几个生活实例。

Beginning with parabolas, the author explores the issue of 定点 between a line and a parabola, eclipse, or hyperbola.

笔者从抛物线入手，对抛物线、椭圆、双曲线与直线结合的定点问题作了一个探索。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。