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The simulated results show that the trend of the dust migration and velocity based on the 3-D transient quasi-single phase models is well in agreement with that based on 3-D two phase flow model. Compared with the two phase flow model and the 3-D transient quasi-single phase models, the time reaching the standard of ventilation is almost the same.

利用拟单相流模拟粉尘在开挖进尺为50m的引水隧洞内的迁移，其趋势和速度与两相流模型的模拟结果基本一致，通风达标时间也接近。

It also becomes more difficult to model and simulate power grid. Traditional"Quasi-stationary"phase models can't be used for studying electromagnetic transient phenomena; on the other hand, the EMTP models can be used to analyze the electromagnetic transient accurately, but for the limitation of the step size, it can't be used to simulate the large network with a high speed.

这对电力系统的建模和仿真提出了更高的要求，传统的机电暂态模型由于建立在&准稳态&假设基础之上，因此不能用来仿真变化迅速的电磁暂态过程；而电磁暂态模型，虽然能准确反映电磁暂态过程，但由于仿真步长很小，仿真速度受到限制，不适合用来仿真大型电力系统。

JAPAN agent, KHK, various models of rack and pinion, THK, IKO, NSK , NOK, such as various models of specifications such as: the slider, rail, screw, wire stem, bearings, Sampoong measuring instrument, such as the United States Fawcett said electron.

代理日本、KHK、各种型号齿轮齿条、THK、IKO、NSK、NOK、等各种型号规格如：滑块、导轨、螺杆、丝干、轴承、三丰量具工具、美国西特电子称等。

Gradually from a single export market into the international and domestic markets, varieties from a single FRP exhibits the development of models to have models, Christmas gifts, paper crafts building materials decoration, window decoration Items such as design and construction.

市场从单一出口逐渐走向国际和国内两个市场，品种从单一的玻璃钢模特展示品发展到有模特，圣诞礼品，纸制工艺品建材装潢，橱窗道具装饰的设计和施工等。

In the case of the introduction of laser GmbH, a German-specific software including boast die die-cutting various models and voluntary winding waste version of the information and work together in Heidelberg, SANWA, MARUMATSU and carry a variety of models.

如嘉洛激光有限公司引进的德国专用软件就包括了博斯特模切机各种型号模切版和自动清废版的资料，以及海德堡、SANWA、MARUMATSU等多种型号模切机的资料。

In this text, on the basis of analyzed the accident characteristic of combustible liquids and influence factors of combustible liquids vapor spread, the leakage of combustible liquids is studied when the vehicle is stopped because of the factors such as traffic accident etc in the highway transportation course of flammable liquid, and its vapor density spread models in the atmosphere is set up; and the leakage of combustible liquids is also studied when the vehicle is steering because of the undefined factors during the highway transportation course of flammable liquid, and its vapor density spread models in the atmosphere is set up.

本文在分析了易燃液体的事故特性及影响易燃液体蒸气扩散因素的基础上，分别研究了易燃液体在公路运输过程中因发生交通事故等因素导致运输车辆停止时的易燃液体泄漏，并建立其蒸气在大气中的浓度扩散模型；因不确定因素致使运输车辆行驶过程中易燃液体泄漏，并建立其蒸气在大气中的浓度扩散模型。

The system models of each unit and process and the economic models were used in this method.

对干燥过程进行优化设计，以年费用最小为目标，将干燥过程表示为最多3段的超结构，每段有2个干燥设备可以选择，给出了单元和过程系统的模型和经济模型。

The numerical results by use of vegetation canopy field observation of Chinese Zhejiang university and two models indicate that the simulations modeled by the two-stream and the four-stream models are mostly consistent in the visible band with small leaf scaterring.

将浙江大学田间观测数据用于模式试验，其结果表明：在可见光波段，因叶片散射率值较小，四流模式和二流模式模拟结果差别不大，模拟的冠层反照率都接近观测值。

Two-position models offer "Normal" and "Tagged" positions, while three-position models have "Closed,""Open," and "Tagged" positions.

这些紧凑的结合点有大量的触点并且有两三个点可利用，两点模型有&正常&和&警戒&状态，三点模型有&开&&关&&警戒&状态，最佳模型允许双向操作。

The basic versions and top-range Elegance models retain the traditional, horizontally fluted grille with the three-pointed star perched discreetly atop the bonnet while the Sport models look altogether more aggressive.

基本款型和顶级Elegance系列保留了传统的水平前脸格栅，奔驰的三点星形标志庄重地矗立在发动机顶盖上，而运动款C级轿车的整体外观则更为张扬。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。