圆周速度

Phase velocity error caused by position error of microtremor observation array is computed under different conditions such as two different dispersive phase velocity models of Rayleigh wave, three kinds of radius, 19 kinds of observation position mode and 6 types of position error.

为研究地脉动观测台阵中观测点之间的定位误差带来的影响，计算了在两种瑞利波频散模型、3种不同的圆周半径以及19种观测位置等多种情况下由6种定位误差引起的瑞利波相速度相对误差，结果表明：由于圆周上观测点数目有限，在不存在定位误差时，相速度误差也是存在的，随观测点位置的不同，相速度相对误差存在差异，其最大值约为最小值的3倍。

Second, a 3D unsteady-state numerical model of heat transfer in laser circular cutting of pipe was set up for the first time, and the kerf width, the cut front profile, the temperature field and the heat affected zone were calculated by using the model.

其次，首次建立了管材激光圆周切割传热过程的三维非稳态温度场计算模型，并计算了不同管径和切割速度条件下的切缝宽度、切割前沿及其相邻基材的温度场和热影响区大小。

This paper discussed the mathematical model of speed control for keeping linear velocity of the welding torch with soldered dot on ellipse circumference constant.

主要讨论为保证焊枪相对于椭圆圆周上的焊点线速度恒定而进行的速度控制，以及保持焊枪始终在工件的焊接轨迹上而进行的位置控制的数学模型。

It proposed the mathematical model of position control for keeping the welding torch always on the welding track of the workpiece.

主要讨论为保证焊枪相对于椭圆圆周上的焊点线速度恒定而进行的速度控制，以及保持焊枪始终在工件的焊接轨迹上而进行的位置控制的数学模型。

After a campaign known as the circular motion, its speed as the circumferential speed, and u said.

后一个运动称为圆周运动，其速度称为圆周速度，用u表示。

In other types of rotary pumps, the liquid is forced to travel circumferentially, however the screw pump has an axial flow pattern and low internal velocities.

在其他类型的旋转泵，液体被迫旅游圆周，但螺杆泵有轴向流型和低内部速度。

The results indicate: diversion shell can transform the kinetic energy of fluid into pressure energy well, and eliminate the circumferential component of fluid; the inlet incidence angle of vaned diffuser increases at the condition of O.8Q, and it results in flow separation very likely and the hydraulic loss increases; it is nearly non-impact inflow at the condition of 1.2Q, and the velocity distribution is uniform at the inlet of vaned diffuser and flow separation dose not appear.

结果表明：导流壳能很好地将叶轮中流出的流体的动能转化为压能，并消除速度的圆周分量；在0.8Q工况下，空间导叶的进口冲角增大，容易在空间导叶背面产生流动分离，造成水力损失增加；在1.2Q工况下，空间导叶的进口接近无冲击入流，在进口处流速分布较均匀，其内部未发生流动分离现象。

Suppose you are running a car at a constant speed with a constant curvature, if you then keep the steering wheel in the same position and increase the car speed gradually, then if the car wants to run on a circle with a smaller radius the car is said to be oversteering, if it remains on the same radius it is neutral and if the car goes to a wider circle it is understeering (for that speed and curvature!).

假设你以固定的速度沿固定曲率的圆周驾驶车辆，然后你保持方向盘角度不变，逐渐增加车辆的速度，此时车辆行使的半径如果变小，称为转向过度（在这个特定的速度和曲率下！）。这个测试还有不同的做法。

The moving muons are like the grandfather, they are the ones performing the round trip journey and experiencing all the forces needed to steer them on their course and bring them back to their starting point.

运动的介子就像祖父，他们做着圆周运动，承受着用来保持运动状态和回到初始位置的所有受力，静止的介子就像孙女；它们的以正常的速度变老，比运动的那些要老得更快或&死&得更早。

We performed a simulative test, which confirms that wavelet analysis can separate annual wobble and Chandler wobble. Our results show that this method can be used in astronomical geodynamies effectively. This paper is divided into two parts. The first is about statistic characteristic of polar motion. Polar motion includes secular motion, long period fluctuations, Chandler wobble, annual wobble and high frequency wobble. The secular motion is 3.4mas/year and towards 760W meridian. Long period fluctuations have difference periods in x-axis and y-axis. They are 31.7-year and 24-year in x-axis and 28.5-year and 22.9-year in y-axis. These 2~? decades fluctuations have an amplitude of about 30 mas , and are very nearly linearly polarized, with the observed motion of pole being almost entirely along a line between 360E and 1440W. There is a 55.4-year wobble whose amplitude is 9 mas. The amplitude of the interannual fluctuations is about 4? mas. The amplitude of long period fluctuations decreased after 1970. The annual wobble is a steady wobble. It retrograde wobble is only 1/20 of prograde wobble in amplitude.

本文的工作主要分为两部分：第一部分是通过分析POLE97序列，我们对极移的统计特性有了一个较全面的认识，极移主要包括趋势项、长周期项、Chandler项、周年项和高频项：趋势项的方向是西经76°，速度为每年3.4mas；长周期项中Markowitz 项在X、Y两个方向有不同的周期，它们分别是：X方向的两个周期是31.7年和24 年，Y方向的两个周期为28.5年和22.9年它们叠加在一起是一个线偏振运动，最大振幅约为30mas，偏振方向在西经144°和东经36°之间；极移的长周期波动中还存在一个 55.4年周期的圆周运动，振幅约为9mas；十年尺度变化的振幅在4～6mas之间，在Y 方向十年尺度的成份比较多，它们的周期在X方向和Y方向不是对应的；从七十年代年开始长周期变化的振幅明显降低；周年项是一个振幅稳定的摆动，在X、Y两个方向的振幅略有差别，逆向运动振幅大约为顺向运动振幅的1/20；Chandler摆动的振幅自1900年以来经历了几次较大的变化，其中包括1915年和1955年两次极大值，振幅分别达到0&。25和0&。28，以及1925～1940期间小于0.09的过程，Chandler项在X、Y 两个方向的振幅几乎完全相等，其逆向运动振幅不到顺向运动振幅的1/50。

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