Optimal control of airflow in a mine fire based on genetic algorithm

The effect of mine fan station on the airflow direction of side branches is highlighted. The prevention of the airflow reverse is studied and proved by the simulation calculation using MVSS.

重点介绍了矿井机站对旁侧风路的风流方向影响，就如何防止旁侧风路风流反向进行了探讨，并用MVSS矿井通风仿真系统模拟运算验证了这一论点；

By analyzing the CDM in China coal mine gas control method of application, proof of coal mine gas in particular, the use of gas in Return Air has broad application prospects.

通过分析CDM方法在我国矿井瓦斯治理中的应用，证明矿井瓦斯特别是回风流瓦斯的利用具有广阔的应用前景。

When the speed of the rotary radial jet reaches 3~ 5 m/ s, the diffusing coefficient of airflow can be increased 2~ 4 times, and effective range can exceed 10 m. Therefore, the gas accumulation in upper corner can be eliminated effectively.

当射流速度达3~5m/s时，可提高风流的扩散系数2~4倍，有效射程可达10m以上，有效地驱散了工作面上隅角的积聚瓦斯。

Intuitive access the characteristics of the air flow of this system through the analysis of the wind screen of dust removal system Merry flow analysis Dust-collecting and dedusting system with air curtain and numerical simulation with Fluent software.

通过对风幕集尘除尘系统风流流场的分析及用Fluent软件进行的数值模拟，直观的获得了此系统风流流场特征。

Tang poetry is like a noble prince whose behaviour is refined and tasteful.

唐诗如贵介公子，举止风流。（谢榛《四溟诗话》）

After the analysis of the factors affecting the secondary air flow, neural network PID control with a predictive model is designed, reducing the interference on the secondary air flow from pipe coupling and total air volume.

在分析了影响二次风流量的因素之后，设计了带有预测模型的神经网络PID控制，减小了管道耦合和总风量对流量控制的影响。

A strong convergent region extended northward about a thousand km from the core of typhoon. Next, the 850 hPa wind field and thermal field of typhoon were asymmetric.

强辐合区从台风中心向北延伸近千公里.其次，850hPa台风流场和热力场不对称。

Range the books by size.

把这些书按大小分类排列.

That's a beautiful shot!

射得漂亮！

Hold the flashlight so that the beam shines straight down on a sheet of white paper.

手握电筒让光线直射在一张白纸上.

When we watch Frosty the Snowman, he roots for the sun.

我们看《结霜的雪人》时，他支持太阳。

Sing Frosty the snowman.

唱歌曲：“雪人”。

Leonard: When we watch Frosty the Snowman, he roots for the sun.

当我们在看“雪人Frosty”的时候，他为太阳欢呼。

Preliminary discussion of law of using acupuncture in typing as well as methods of reinforcing and reducing of functional dysmenorrhea over the past 20 years

近20年原发性痛经辨证分型与针灸补泻方法运用规律初探

Some kids were already there. We made some snowmen and rolled snowballs.

有些孩子已经在那里了。我们堆了一些雪人，滚了雪球。

These days, only a few people continue to take the story of the Abominable Snowman seriously.

这些天来, 只有少数人继续把可恶的雪人的故事当真.

There is the myth of the Abominable Snowman.

曾流传有喜马拉雅雪人的神话.

He is Known as the Abominable Snowman.

他被称为可恶的雪人.

We can make a snowman in winter.

在冬天,我们能堆雪人.

A: Certainly ! Shall we make a snowman?

当然! 我们堆雪人好 吗 ?