反向

One minor drawback of this self-checking feature shows up in what has been described as roll ratcheting.

这一自动调整功能的一个小缺点表现在上面谈到的滚转反向修正上。

It is shown that the contact interaction enables bottom drillstring to whirl backward, and then an alternate bending stress with higher frequency is produced. So the drillstring fatigue failure could be accelerated. At the same time, a quite strong wallop force of high frequency is produced on the contacting point, and the contacting zone is next to the screw coupling of drill collars. It will easily result in the failure of screw couplings. The research results provide theoretical basis for the prevention of drillstring failure.

研究表明，下部钻柱与井壁的碰摩作用使下部钻柱反向涡动，产生高频的交变弯曲应力，会加速下部钻柱疲劳破坏；下部钻柱与井壁接触点处存在较大的高频冲击力，并且接触区域靠近钻铤螺纹联结处，更容易诱发螺纹联结处失效，该研究成果可为预防钻柱失效提供理论依据。

Two simplified analysis formulas on using open circuit voltage and short circuit current are proposed to calculate PN junction quality factor and reverse saturation current of the photocell.

提出了两个使用开路电压和短路电流计算光电池PN结品质因子和反向饱和电流的简化解析计算公式。

It is found theoretically and simulation that a piece of solar cell have same photocurrent in different diode factor and reverse saturation current at same temperature and irradiation. This paper describes a new combined perturb and observe method for acquire the actual diode factor n and reverse saturation current Io.

经过理论分析与仿真研究，发现同一块太阳能电池在相同的温度和照度，不同的二极管反向饱和电流Io和品质因子n的情况下，输出的光生电流是相等的。

In the proposed algorithm, the combined perturb and observe (P0) method is used to acquire the actual diode quality factor and reverse saturation current, and a comprehensive compensation without the P0 method is employed to track the actual maximum power point.

该算法利用爬山法求取实际的二极管品质因子和反向饱和电流，然后停用该法，通过综合补偿准确跟踪到实际的最大功率点。

The sample holder is inverted and placed into the retainer frame.

样品架反向放置在保护框架内。

The results showed that the promoters of OsPLD3 and OsPLD4 could drive the expression of the reporter gene in various tissues of the rice flower organs at different levels. The expression of both genes was induced by wounding and methyl jasmonate, but with different intensity at different time intervals.

利用反向遗传学技术对水稻磷脂酶D 家族中的两个成员OsPLD3 和OsPLD4 基因及其启动子的研究显示： OsPLD3 和OsPLD4 的启动子在花器官的不同部位中驱动报告基因不同程度地表达，二者都受损伤和茉莉酸甲酯诱导，但是对诱导因子反应的时空模式不同。

However, it is not so comfortable to take a mo di in cold winter, because low temperature and the strong wind make you shiver.

但在冬天，乘坐摩的可没那么舒服，寒冷的天气再加上摩托车行驶过程中的反向风让您哆嗦不止。

Through its unique reverse-flow layout, the 550i's V-8 engine is able to achieve higher output without correspondingly higher fuel consumption.

通过其独特的反向流布局，550i将会的V - 8发动机是不能够实现相对较高的油耗更高的输出。

According to the simulation of the mixing property for KBME, the axial distributive mixing property and the shear property of reversed kneading blocks are better than those of neutral and forward ones, and those of normal screw element are worst, whereas the kneading disc width has few impacts on these two properties.

通过对捏合盘混炼段的混合性能模拟可知，就轴向分布混合性能和剪切性能而言，反向捏合块元件优于正向元件和中性捏合块元件，捏合盘厚度对这两个性能的影响不大，而常规螺纹元件的这两个性能相对较差。

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％。