偏心

A new accurate exterior trajectory model was studied based on the formertrajectory model considering eccentricity of acceleration of gravity etc.

本文在已有弹道数学模型的基础上，研究了地球为椭球体时重力偏心，全面考虑了重力偏心及以往在射程和弹道高不大时忽略的"小量"，建立了高空远程弹箭的较精确弹道数学模型。

Quantity analysis of ductility and load support capability of asymmetric system was studied.

考查偏心距的动力效应，得到偏心距动力放大系数的变化规律。

Due to the particularity of tank barbette system, the particular SOGFCMAC online learning control method for tank barbette horizontal stabilizing system was presented, and then used into the compensation of the unbalanced torque in tank barbette system. The computer simulation results show that it can effectively eliminate the influences produced by the unbalanced torque, and can improve the stable accuracy and the stable tracking accuracy of the tank barbette.

针对坦克炮塔控制系统的特殊性，提出了坦克炮塔水平向稳定器的SOGFCMAC在线学习控制方法，并将之应用于坦克炮塔偏心力矩的补偿中，计算机仿真结果表明该方法能够有效消除偏心力矩造成的影响，提高坦克炮塔的稳定精度与稳定跟踪精度。

Power-law fluid is used to describe the Non-newtonian rheological property of the produced fluid in a polymer-driving well; the governing equations, boundary and initial equations of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially is established in bipolar coordinates system; formulas of instantaneous flow rate and stress distribution on the outwall of the inner cylinder of the unsteady flow of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially are established.

在理论上，用幂律流体模型描述了聚合物驱油井产出液的非Newton流变性；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中非定常流的控制方程及边界条件和初始条件方程；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中流动时瞬时流量和流体在内管壁上的压力分布计算公式。

Results The detecting rates of the displacement of the mitral coaptation point ,the flail partial mitral leaflets,the coarse and erratic flutter of flail leaflets, the flicking mitral chordae tendineae with coarse and erratic flutter and the vegetation by TEE and TTE with 2-D were 100%and 94.3%, 100%and 65.7%, 85.7%and 54.3%, 77.1%and48.6%, 100%and33.3%, respectively.With color Doppler imaging,eccentric wall jets or eccentric-centric jets were all detected by TEE and TTE, respectively. The regurgitant volume based on PISA method by TEE and TTE was(2025±402)and (607±268)ml/min,respectively.

结果 TEE和TTE对二尖瓣腱索部分断裂的切面超声征象包括收缩期瓣缘对合不良、局部链枷运动、局部粗大扑动、腱索断端飞鞭运动伴粗大扑动及赘生物的检出率分别为100%和94.3%、 100%和65.7%、 85.7%和54.3%、 77.1%和48.6%及100%和33.3%； TEE和TTE二尖瓣腱索断裂的彩色多普勒表现为偏心附壁返流束或偏心伴向心返流束，其检出率均为100%；根据PISA法由TEE及TTE估测的返流量分别为(2025±402)及(607±268)ml/min。

This paper analyzes the moving characteristics of nipper mechanism of new type FA266 comber made in China, and discusses the eccentric shaft and eccentricity influence on combing processing and the moving of nipper mechanism, which provides the theory basis of the from of opening-closing time adjusting mechanism, dimension, process parameter, and adjustment pattern.

分析了国产新型精梳机FA266钳板机构的运动规律，讨论了偏心轴偏心距对精梳工艺及钳板机构运动的影响，为确定国产新型精梳机中钳板运动的开闭口定时调节机构的形式、尺寸、工艺参数及调节方式提供理论依据。

The theoretical and computational results show that an important reason resulting in eccentric wear of the inner cylinder and the pumping rod lies in the nonuniformity of the stress distribution on the outwall of the inner cylinder which yields excentralization effect of the pumping rod when swabbing fluid flows in eccentric annuli with the pumping rod moving axially in a well.

在实验上，通过不同重量百分比浓度的HPAM水溶液在内管做轴向往复运动的偏心环空中非定常流实验，把由理论公式算得的时间平均流量与实验中测得的时间平均流量做了比较，验证了本文数值计算幂律流体在内管做轴向往复运动的偏心环空中非定常流方法的正确性；上述的理论与计算表明，抽油机井杆管偏磨的一个重要原因是，在聚驱工况下，抽汲液体在抽油杆做轴向运动的井筒中流动时，抽汲液体作用在抽油杆外壁上的压力分布的不均匀性所引起的抽油杆在井筒中的偏心效应。

Results: Of the slight keratoconus group: the above indexes significantly decreased(P＜0.05). Of the moderate group: the above indexes, except for the apex decentration distance significantly decreased at 12 months and more evidently at 18 months. Of the severe group, the K value significantly decreased at 12 months and other figures remained unchanged. However, all the indexes significantly decreased except that the apex decentration distance remained unchanged at 18 months.

结果：轻度组，配戴RGPCL后角膜散光、锥顶K值、锥顶偏心距离、SRI、SAI较配戴前均有显著性降低（P＜0.05）；中度组，除12个月时锥顶偏心距离、角膜散光值较配戴前无显著变化外，其他各项参数亦有明显降低，18个月时下降更为明显；重度组，12个月时除锥顶K值显著减小外，其他参数变化不大，18个月时除锥顶偏心距离的变化不显著外，其他参数显著降低。

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。

An old bridge eccentric production prorator has an advantage of separate testing for single zone, and we enhance the advantage to satisfy the need of separate prorates.

消除了原偏心配水技术采用递减法进行流量测试时存在的问题，是偏心分层注水技术的完善和突破；测分层压力时，不但可以实现单层分测，而且不用投捞偏心堵塞器，既提高了分层资料的准确度，又提高了分层测试效率。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。