随机

According to the statistical meaning of random loading actions, the reliability model of a gear under frequent random loading actions is developed with the theory of order statistic. And the dependence of gear reliability on the frequency of loading actions is studied.

根据随机载荷作用的统计学意义，运用顺序统计量理论建立了随机载荷多次作用时的齿轮可靠性模型，并研究了齿轮可靠度随载荷作用次数的变化规律。

It is proposed to directly carry out the orthogonal expansion of the seismic displacement to capture main probbilistic characteristics of the seismic ground motion with only a few terms of the series.

考虑到直接对地震动加速度随机过程实施正交展开，很难达到以较少展开项数反映原随机过程的目的。

Taking the regional seismicity energy as the random function of space and time, the features of small seismicity field in Ningxia and its neighborhood region are studied by the analytical method of natural orthogonal function expansion.

地震释放能量是地震活动的一个本质要素，可看成是空间和时间坐标的随机函数，这个随机函数可称为地震活动能量随机场，或称为地震能量场。

In the frame of Random Matrix Theory,the statistic functions of therandom orthogonal unitary vectors are calculated.It is shown that their means andfluctuations will tend to zero with the increase of N,while following thescaling laws.

在随机矩阵理论的框架内，我们数值地计算了随机的正交归一矢量的这两个统计函数，发现它们的平均值和涨落随N(N＝1/h)的增大而趋于0，并且有明显的标度关系。

Tailored exercise programs and yoga have been shown to reduce pain and prevent relapses in patients with chronic LBP.186–190 In randomized,clinical trials, osteopathic manipulation has been shown to provide moderate relief for LBP patients,191,192although one study showed no difference between the benefits afforded by true and sham manipulation.193 Acupuncture has also been shown in randomized trials to provide significant benefit in patients with chronic LBP.194–196 However, similar to manipulation, one of the largest and most methodologically sound studies found no difference between true and sham acupuncture.197

简易体操和瑜伽被证实在LBP患者中能减轻疼痛防止复发。在随机对照临床研究中，整骨推拿显示可以轻度缓解LBP患者的症状，但是一项研究显示真正和假的推拿对比后结果之间无差别。在一项随机研究中，针灸似乎也可以缓解LBP的症状，但是像推拿一样，一项大样本，方法更科学的研究认为真正和假的针灸结果并无差别。

And then a Gauss sequence is formed out of uniform distribution by a function transforming nethod.

然后采用函数变换法由均匀分布的随机序列生成高斯分布的随机序列。

Conversely, if you don 't have plenty of RAM, dedicating some of it to a RAM drive will only increase your page fault rate.

相反地，如果你没有许多随机存取储存器，只把它其中的一些献给随机存取储存器驾驶将会增加你的页过失率。

This pattern of genetic structure implies non-random mating and restricted gene flow among eels from different sampled locations, which therefore refute the hypothesis of panmixia.

这种遗传结构暗示非随机交配模式和不同区域样品间存在一定限制的基因流，因此否认了随机交配假说。

The panmixia hypothesis--that all European eel migrate to the Sargasso Sea for reproduction and comprise a single, randomly mating population--is widely accepted.

欧洲鳗鲡随机交配的假说—所有的欧洲鳗鲡个体都洄游到Sargasso海进行繁殖，组成一个单一并随机交配的群体—一直被广泛接受。

Methods Seven healthy male adult Rhesus were randomly divided into control group and +15 Gx group. The +15 Gx group underwent parabolic G curve in animal centrifuge.

方法7只健康雄性成年恒河猴随机表法随机分为对照组(2只)和+15Gx组(5只)，+15Gx组在动物离心机上承受+15Gx峰值的抛物线形过载曲线作用

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。