查询词典 order of magnitude

The Prandtl coordinate transformation is used to transform the wavy surface into a regular plane, and the obtained equations are then simplified further by the order-of-magnitude analysis to give the boundary layer equations.

用Prandtl 座标转换的观，将波形表面变成一规则的平面，其次用级分析，进一步推导出系统的边界层方程式。

We find that, i the diagrams withthe annihilation topology have a suppression factor 〓 relative to those withspectator topology; ii our results are much different from other model predic-tions for some decays modes; iii the pure W-exchange process 〓with a branching ratio 〓 can be found even before the B-factory era;iv for B →ππ,πK and KK decays, our results are well below the experimen-tal upper limits, but they are about one order of magnitude below the BSWpredictions.

其次，我们从有效哈米顿出发，利用微扰QCD方法系统研究了末态为两个赝标介子的B介子衰变过程，对可能的图进行了分类，给出了一般的计算方法和一般性公式，并且将其应用于纯W湮灭和W交换过程，B→ππ，πK和KK过程以及〓→PP过程。

It was found that the residual pulsant Reynolds stress term of coherent structures has the same order of magnitude with the Reynolds stress contribution term of random fluctuation and can not be ignored in the dynamic model of coherent structures. This is not as that estimated before.

研究发现，相干结构剩余脉动雷诺应力项在数值上具有和随机脉动对相干结构贡献的雷诺应力相同的数量级，表明在相干结构动力学模型方程中，相干结构剩余脉动雷诺应力项并不像以前佑计的那样可以忽略不计。

The main results are as follows:（1） the distance a sounding balloon drifts during operation is a lot longer than that is accepted as a horizontal resolution by present numerical models;（2） the positioning scheme presented for sounding balloons is basically applicable to a resolution of 10 km × 10 km;（3） on the whole, the position correction leads to the fact that the resulting analytic increment field is one order of magnitude smaller than the original;（4） analysis of the model predictions shows that soundings, when positioned,leveled soundingswould improve predictions.

结果表明：探空气球在施放过程中的漂移距离远远超过目前数值模式可取的水平分辨率；所设计的探空气球定位方案对水平分辨率为10km 10km的数值预报模式基本是可用的；总的来讲，位置订正对分析增量场的改变与原分析增量场相比小一个量级。模式预报结果显示，探空资料的定位使降水预报效果得到了改善。

This excess noise spectral density is about one order of magnitude higher than the background 1/f noise.

这额外杂讯密度的量比较背景的1/f杂讯可大上十倍。

Once the supercontinent is built,plate tectonics may enter a period of inactivity as the rate of subductiondrops by an order of magnitude.

超级大陆一旦形成，板块构造可能会进入不活跃期，俯冲的机率也会大大下降。

With the developing trend of large size and large capacity, the turbine's natural frequencies are decrescent, maybe reaching the input forces' order of magnitude. So, it is becoming more and more important to analyze the stability of a turbine.

随着水轮机组朝着大尺寸、大容量的方向发展，其自身的固有频率也随之降低，与干扰激振力的频率属于同一数量级，因此，水轮机组运行的稳定性就变成更为重要的问题。

In Chapter 5, photo-induced absorption is used to study the intersystem crossing from singlet to triplet states of two polyfluorenes after doped with Ir-complex. It is found that the triplet exciton lifetime of PFs is reduced by the dopants. But instead of decreasing, the population density of PF triplet exciton increases by almost one order of magnitude. The finding shows that the ISC rate can increase over 100 times due to the spin-orbital interaction with the Ir ions.

第五章以光诱发吸收光谱技术研究两种聚芴高分子掺杂绿光铱错合物后，聚芴的单重态到三重态的内部系统转换效率的改变；研究发现在掺杂后，聚芴的三重态生命期减短，但出乎意料的是其三重态的态密度并没有随之降低反而有一个数量级的增加，其原因为单重态到三重态的内部系统转换受铱错合物的影响效率增加了100倍。

The experiment proves that as the method of the invention is adopted, the irradiancy of rare-earth ions can produce the reinforcement of order of magnitude, which can be compatible with the semiconductor industry; the invention has the advantages of convenient and rapid operation, low cost, mild preparation condition, good technique repeatability and obvious effect and can be fully applied to future silicon based photoelectron field.

实验证明，采用本发明的方法可以使稀土离子的发光产生数量级的增强，可以与半导体工业相兼容，具有操作方便、快捷、成本低廉、制备条件温和、工艺重复性好、效果明显等优点，完全可以应用于未来的硅基光电子领域。

Then, to select among concepts that pass such order-of-magnitude analysis, a more refind decision-making analysis must be applied.

然后，在通过这种数量级分析的概念中精选时必须采用一种更精确的决策分析。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。