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The authors discuss a new numerical simulation method of the downburst wind loads on the basis of the previous research. Firstly, the wind speed is expressed as the sum of an instantaneous mean wind speed and an amplitude-modulating non-stationary fluctuating wind speed. Secondly, a new method based on the modified Osegguera and Bowles/Vicroy model to simulate the mean wind is presented and the fluctuating wind is simulated by a modified spectral representation method.

在将下击暴流风速表达为时变的平均风速和调制的非平稳脉动风速之和的前提下，本文采用基于改进的OBV模型Oseguera and Bowles/Vi-croy(OBV的方法来模拟平均风速，其平均风速直接由改进的OBV模型表达，而不同于已往研究中将平均风速表达为竖向风剖面与时间函数的乘积，并采用结合快速傅里叶变化的谐波叠加法来模拟调制的非平稳脉动风速。

On the D110, when mean total length reached about 86.5±5.9 mm, ovarian cavity grew bigger, and oocytes were firstly detected. Differentiation of testis was firstly observed in juvenile flounder with mean total length of 63.5±3.4 mm on the D90 when spermatogenous cell proliferated rapidly and spermaduct formed.

在90日龄、平均全长为63.5±3.4 mm的雄性牙鲆中，精原细胞快速增殖，并观察到了输精管结构；进一步的细胞学分化则出现在100日龄、平均全长为76.0±8.6 mm的个体中，此时可以看到精小叶的形成；在平均全长为140.0±15.2 mm时，精巢中出现初级精母细胞，标志着性腺分化的基本完成。

METHODS: The mean preoperative spherical refraction was -3.66 diopters and the mean cylinder was -0.66 D for all eyes.

全部眼睛的平均术前球面折射为-3.66屈光度和平均散光为-0.66 D。

With the increasing of undercooling, the mean crystal diameter of supercooled solidification microstructures shows a variation from coarse to fine, then fine to coarse, and finally fine again. The coarse crystals are developed crystals, while the fine crystals are spherical crystals with a mean diameter about 50μm.

2随着过冷度的增加，深过冷凝固的微观组织的晶粒直径呈现出"粗—细—粗—细"的变化规律，粗晶为发达的等轴枝晶，细晶则为直径约50μm的球晶。

The mean age was 26.9 years ( range, 18 to 47 years); Mean spherical refraction was -(5.89±3.34) diopters (range,-1.50 to -15.0 diopters).

结果被检查者男性213人，女性287人；年龄18~47岁（平均26.9岁）；屈光度-1.50~-15.0D(5.89±3.34D)；散光度-0.25~-5.0D-0.71±0.54D。

Methods LASEK was performed on 40 eyes of 22 patients with extremely high myopia. Mean preoperative uncorrected visual acuity was 0.02±0.02(range 0.01-0.05) and the mean spherical equivalent was -12.75±2.30 D.

应用德国Zeiss MEL 80准分子激光器对－10.00以上的超高度近视22例（40眼）施行LASEK术，术前平均裸眼视力0.02±0.02 (0.01~0.05)，平均等效球镜(-12.75±2.30)D。

Postoperative refractive error in group Ⅰ was prominent, and the mean spherical value was 5.12±2.53 D and mean cylindrical value was 3.23±1.55 D.

组患者术后屈光度差异大，平均球镜值(5.12±2.53) D，平均散光度(3.23±1.55) D。

I dont mean him to see me. I just mean to spy on him.

"我不让他寻我，我要侦察他。"

"I don't mean him to see me. I just mean to spy on him."

"我不让他寻我，我要侦察他。"

With the system, in vivo experiments were performed and the result proved the validity and feasibility of this approach. The result can be presented like this: the mean WSR value of common carotid artery from healthy adults is between 150~350s-1, and the max WSR value is between 450~750s-1; with comparing the WSR value from a male who is suffering from the internal carotid artery straitness with the natural range of WSR, a phenomenon was found that his max and mean WSR value are both smaller than the natural value evidently.

并且利用该系统进行了大量的在体实验研究，得到了相应的结果并验证了该方法的有效性及可行性，该结果显示：健康成年人的颈总动脉的血管壁剪切率平均值范围为150~350s-1，最大值范围为450~750 s-1；将患有颈内动脉狭窄的患者的血管壁剪切率与正常范围比较发现，其血管壁剪切率的最大值及平均值均显著小于正常范围。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐