抛物线的

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。

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。

After the fatigue curve with 50% reliability and a few fatigue test results of a crane element have been known, the method, namely JFKC method, in this paper can be used to get the fatigue limiting stress distribution of this crane element quickly, based on the Miner Hypothesis and.

本文在已知某种起重机零件可靠度为50%的疲劳曲线并有了该种零件的少量试件的疫劳试验结果的条件下，以作者提出的修正的曼耐尔假设和抛物线假设为基础，提出了起重机零件疲劳极限应力分布的快速测定法——JFKC*法。

Woman whole life to heel of shoe height of request, compare to the parabola be similar, when young wear low-heeled shoes:If is sport style, usually is for the sake of the manifestation itself of sarcastic lovely, the shoe top color be gorgeous, if is fair lady style, the decorate of shoe top then think very much, add a bowknot, inset up some pearl or paillette, but aught, heel of shoe affirmation is so-so, most also just Xie type;Attend a work, the heel of shoe will rise along with the climb of post or increase of social intercourse activity but more and more Gao, Gao of the heel of shoe can increase chemisette charming manner, such as the willow hand breeze and flutter many Zi, shape also more ability bring into relief, female the magic power be exertive to the extremity;After age enlarge, the high-heeled shoes start isn't suitable for to run about, slowly fell the very ugly appearance of old style and the color and the rise half be a black.

女人一生对鞋跟高度的要求，就好比抛物线一样，年少时好穿平底鞋：如果是运动款，往往是为了显示自己的俏皮可爱，鞋面颜色绚丽，如果是淑女款，鞋面的装饰则很花心思，加个蝴蝶结，镶上些珍珠或亮片，但是不管怎样，鞋跟肯定是平平的，最多也只是个楔型；参加工作了，鞋跟会随着职位的爬升或社交活动的增多而越来越高，高的鞋跟可以增添女人的媚态，如杨柳扶风，摇曳多姿，身材也更能突显，女性魅力发挥到极点；年纪增大后，高跟鞋开始不适合行走，慢慢的落到了老式的丑丑的样子，颜色还多半是黑色的。

Therefore,a series studies of ice-pier vibration are performed from different aspects in this paper.The main work of this his thesis is summarized as follows:(1) Ice response spectra is proposed based on the idea of a seismic response spectra analysis of str .. uctures.Firstly,ice response spectra on the basis of power spectra density function is established;Secondly,based on the assumption of quadratic parabolic interpolation method,the nonlinear interpolation analysis method of ice response spectra is studied from both theoretical and practical points of view,and the successive computation formulas including ice displacement,velocity and acceleration response spectrum are deduced by Duhamel integral.Furthermore,to analyze the effectivity and applicability of the method, the real temporal curves of ice pressure are used to be studied.The results show that the presented method is more convenient and accurate to study the structural response induced by ice force,also it can be effectively applied in the design of ice resistance.

鉴于此，本文针对冰激桥墩结构振动问题从不同方面展开了一系列与之相关的研究，主要研究内容如下：(1)根据结构抗震反应分析思想提出了冰振反应谱，首先建立了基于功率谱密度函数的冰振反应谱；其次借鉴地震反应谱内插法的思想从理论和实际观点出发，假定在等距离微小时间间隔内冰荷载按二次抛物线规律变化，由Duhamel积分推导出冰振位移、速度以及加速度反应谱的一系列连锁公式，建立了基于非线性内插法的冰振反应谱，并利用实际冰压力时程曲线进行了冰振反应谱数值分析，为以后冰激结构振动的研究提供一种方便、简捷、精确的分析方法，也能够将其有效地应用到结构的抗冰计算中。

The oxidation kinetics of depleted uranium was studied in pure oxygen pressure of 5 kPa at below 100°C by using spectroscopic ellipsometry. The relationship of the thickness of uranium oxide with time is measured. The results indicate that below 100°C in the initial period, the relationship between oxidation layer thickness and time is parabolic. The oxidation mechanism of depleted uranium is discussed and the active energy of depleted uranium at given experimental conditions is 87.165kJ/mol from calculation.

采用椭偏技术研究了45~95℃和5kPa纯氧气氛中金属铀的氧化，通过不同温度下金属铀表面氧化层厚度随时间的变化规律，得到贫铀在初始氧化阶段的表面氧化层厚度与时间的关系均呈现抛物线规律；绘制出了在不同温度下金属铀表面的氧化动力学曲线，由此得到在低于100℃，5kPa的纯氧气氛下贫铀表面形成氧化物的反应活化能为87.165kJ/mol。

Based on the stress analysis to spired axis mechanism,in the aspect of sliding part which smoothes through alveolus intersection, theresearch of parameters optimization, about the middle alveolus of spired axis andthe dimension of sliding part, has been studied. To the problem that the reverseportion at the both sides of spired axis lashed fiercely and fraies quickly, thearticle finely analyses the best curve of alveolus when adding cushiony spring atthe both sides.

在对螺旋轴机构进行受力分析的基础上，从滑块顺利通过齿槽交叉点的要求方面，对螺旋轴中间段齿槽和滑块的尺寸进行了参数优化分析；针对螺旋轴两端曲线齿槽反向段在高速工作时冲击大、磨损快的问题；从减少滑块在齿槽反向段运动的冲击方面，比较分析了圆弧、抛物线、三角函数等曲线作为螺旋轴齿槽反向段曲线的加速度，提出了较优的(来源：ABCab论bf文网www.abclunwen.com)反向段曲线。

Results indicate that radial distance of the bushing from the rotor center and the radius of the hemispherical bushing significantly affect wear rate,and minimzing both two values will result in lowest wear for micro-rotor systems in MEMS.However,it is noted that the bearing radius sets a lower limit on the hemispherical bushing radius since the bushings are located beyond the rotor inner radius.It is desirable to reduce their effects on friction and wear on micro-rotors by regulating the radius of the bushing and the radial distance of the bushing from the rotor center within permissive range of micro-fabrication.Severe wear exists with increasing applied load and rotating speed of the rotor.Stress distributions in the contact region are different from Hertz solutions due to the convergence stresses apearing on the uncontinuous curvature line and the contact pressures display symmetrical parabola in the contact region.

结果表明：在MEMS微转子系统中，微转子轴衬偏心距离和转子轴衬半径影响线磨损率，以两者减至最小为较理想，但须注意设计中轴承半径的限制，并使轴衬偏心距离大于轴承内半径；在转子加工制造许可的范围内，可以通过调整转子轴衬的半径和偏心距离来减少摩擦磨损对微电机的影响，随着转子所承受载荷和转子旋转速度的增加，其磨损严重；接触区的应力分布不同于经典Hertz解，这是由于应力集中出现在不连续的曲率线上，且接触区的接触压力呈现轴对称抛物线状分布。

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。

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。