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A new mathematical model is put forward numerically to simulate the wheel ovalization.. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed. Using the new numerical method investigates vehicle-track coupling system dynamic responses including lateral and vertical displacement of wheelsets and the vehicle, lateral and vertical vibration acceleration of the track at different phase angle of the two side wheels of the same wheelset, which are compared with that of the traditional model. The numerical results show that the discipline and frequency of dynamic responses are accordant, amplitude and phase of lateral dynamic responses are different. It is concluded the traditional track geometric irregularity excitation model does not simulate the effect of periodic wheels ovalization on vehicle-track coupling system dynamic behavior truly, the new model is more accurate and reasonable.

本文研究了车轮二阶周期性非圆化—椭圆化，建立了一个新的模拟车轮椭圆化的数学模型，结合车辆－轨道空间耦合动力学模型，计算了同一轮对左右车轮不同相位和车轮椭圆度下轮对和车体的横、垂向位移，钢轨横、垂向振动加速度，并与传统模型计算结果作了对比，分析表明两种模型的动力响应变化规律和频率一致，但横向动力响应幅值和相位均存在不同程度不可忽略的差异，因此传统的轨道几何不平顺激励模型不能真实模拟车轮的周期性椭圆化对车辆－轨道耦合动态行为的影响，而本文模型更能反映实际椭圆车轮与钢轨接触情形，计算方法准确而合理。

The strew length of prefixed point was 41.84 mm, the screw angle with panes lateralis was 69.41°, the screw angle with inferior verticular plane of panes lateralis was 22.67°; the length of postfixed point was 42.28 mm, the angle with panes lateralis was 68.45°, the angle with inferior verticular plane of panes lateralis was 20.79°. Of the 60 nails drilled, two were drilled out of the post facies articularis of calcaneous, the accuracy rate was 97.67%.

其前点螺钉平均长度为41.84 mm，与跟骨外侧面平均呈69.41°、与跟骨外侧面的底垂面平均呈22.67°；后点螺钉平均长度为42.28 mm，与跟骨外侧面平均呈68.45°、与跟骨外侧面的底垂面平均呈20.79°；30足60枚钢针有2枚钻出跟骨后关节面，钻人安全率为97.67%。

Her right hand, holding a bunch of cocoons, fell by her side listlessly, and her round check was paled, either by the light or by the weariness that was expressed in her attitude; her lips were pressed poutingly together, and every now and then her eyelids half fell: she was a large image of a sweet sleepy child.

她的右手拿着一束茧子，有气无力地垂在身边；她的圆圆的脸颊显得很苍白，或者是由于光线，或者是由于她那姿态所显出的困乏。她的嘴唇微微地噘着，时不时一双眼睛就半垂下来。她真是一个想瞌睡的甜蜜的孩子的大型塑像。

Objective To investigate the skill,efficacy and safety of laparoscopic sacrospinous ligament fixation,the LSSLF technique was used as part of the vaginal repair procedure for marked uterovaginal prolapse, and in the treatment of vault prolapse.

目的 探讨腹腔镜下骶棘韧带固定术（laparoscopic sacrospinous ligament fixation LSSLF）治疗子宫脱垂和阴道穹隆脱垂的手术技巧和临床疗效。

Uterovaginal and vault prolapse; sacrospinous ligament fixation;Laparoscopy

子宫脱垂，阴道穹隆脱垂，骶棘韧带固定术，腹腔镜

The calculation results of some examples are given. In the unstratified case, the cake cross section at any point is circular. When the flow is stratified, buoyancy cause the wake, which initially grows at the same rate in all directions, to collapse in the vertical direction and flatten out horizontally producing a very wide and thin rectangular shape.

在稳定层化海洋中，潜艇尾流以圆锥形增长；在非层化海洋中，初期尾流也以圆锥形增长，但在浮力作用下，尾流垂向增长崩溃，然后以又薄又宽的近于矩形截面增长，最后垂向尺度趋于常值。

Then make fifty bronze clasps and put them in the loops to fasten the tent together as a unit.

罩棚的幔子所余那垂下来的半幅幔子，要垂在帐幕的后头。

Droops affection for cable"s angle and force is analysed and applied droops-modified formula of cable"s angle and force are given.

分析了拉索的自重垂度对其索力和倾角的影响并推导得出索力和倾角的垂度修正实用计算公式。

These are known as prolapsed or prolapsing haemorrhoids.

这些被称为脱垂或脱垂痔疮。

Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.

於单机模式或特种部队模式中，在垂降的敌人落地前，杀掉2个正在垂降的敌人

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。