平均速度

This paper studied the preliminary research of biology characteristics of 8 provenance of the Ailanthus altissima Swingle .

对臭椿的8个种源的种子生物学特性变异进行了初步研究，测定指标包括种子形态、千粒重、净度、含水率、发芽率、发芽势、平均发芽速度和活力指数。

Its GDP has increased by an average of almost 10% a year for the past 30 years.

在过去30年里，它的GDP平均每年以几乎10％的速度在增长。

Constructing model apparatus system of bell-like suction box, the outlet section velocity distribution was measured by probe under various suction open heights.

以流道出口速度均匀度、速度加权平均角、水力损失大小为评价目标函数，研究了钟形进水流道不同喇叭口悬空高度的内流场特征和水力损失特性，提出了喇叭口悬空高度的合理取值范围。

Firstly, saltating sand grains in various height layers mostly rotate clockwise; the rate of counterclockwise rotation changes from 16.7 to 33.3% for three different friction wind speed (u*= 0.67, 0.83, and 0.87 m/s). However, their mean rotational speeds were not significantly different, irrespective of whether the grains rotated clockwise or counterclockwise. The mean counterclockwise rotational speeds of sand grains for friction wind speed u*= 0.67, 0.83, and 0.87 m/s were 427, 519, and 604 rev/s, versus 429, 522, and 609 rev/s, respectively, in the clockwise direction.

首先，风沙流中各高度层内跃移沙粒旋转均以顺时针方向为主，逆时针方向旋转的沙粒数仅占总数的16.7-29.5%，但是无论逆时针还是顺时针旋转的沙粒，它们的平均旋转速度几乎没有差别(如u*＝0.67 m/s时，分别为427 rev/s和429 rev/s；u*＝0.83 m/s，分别为519 rev/s和522 rev/s；u*＝0.87 m/s，分别为604 rev/s和609 rev/s)；不同摩阻风速条件下各高度层内沙粒的旋转速度均服从Lorentzian分布。

In present paper a three-dimensional discrete vortex filament method is put forward to simulate the motion and bubble entrainment of an inviscid,incompressible vortex ring .

本文发展了三维离散涡模型用于模拟无粘不可压缩涡环的发展及其与气泡的相互作用，涡环被离散为平均分布在其中心线上的球形涡元，由Biot-Sarvart定律叠加每个涡元的诱导速度得到涡环的运动速度。

The particles in the shear band demonstrate significant rotation. Higher gradients are found in velocity and rotation fields on the edge of the shear band.

通过转动场和速度场的分析可知，剪切带宽度约为10～15倍的砂土平均粒径，带内颗粒转动明显，带边缘出现大的速度和转动变化梯度。

The main results of endogenesis analysis include: 1 main business is quite concentrated but with a low rate of gross profit; 2 good profit quality, but decreasing profitability; 3 profit increase faster than the growth of main business; 4 the turnover rates of inventory, receivables and payables are all above the industry average; 5 good control of management expenses.

内生性分析的主要结果有：（1）主业非常集中，但毛利率偏低；（2）盈利质量强，盈利能力下降；（3）利润增长速度要好于主业成长速度；（4）存货周转率，应收账款周转率，应付账款周转率均好于同业平均水平；（5）管理费用控制较好。

Meanwhile, we have also obtained the result that the average ablation vel...

同时，得到中心区的平均烧蚀速度为10m/s数量级，它远小于产生的烧蚀等离子体的喷发速度。

In 1981-1990 period, the traditional Korean industrial city of Seoul, busan taegu, its employment growth rate than the national average 72% of employment growth rate lower by 20 points.

在1981-1990年期间，传统的韩国工业城市首尔、釜山、大丘其就业增长速度比全国平均72%的就业增长速度要低20个百分点。

While overall manufacturing output declined an average 13.1% saar over the last two months, the decline in production of consumer goods was a minuscule 0.5%saar while the decline in production of business equipment was -20.8%saar.

尽管过去两个月制造业总产出平均下滑13.1%，但消费品的产出下滑速度只是极其微小的0.5%，而商业设备的下滑速度则是20.8%。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。