风压

According the character of s7-200 PLC ,we introduce the principle of controlling and the designing way of hardware and software in air-pressure controlling .the built-system run well ,operate simply and is applied.

根据S7-200可编程序控制器的特点，详细介绍其在控制风压中运用的控制原理，软件及硬件的实现方法。设计完成的系统运行可靠、操作方便、具有很强的实用性。

In the method, a optimization model of a ventilating network is put forward by taking the minimizing squared sum of algebraic sum of the ventilation pressure of all branches in a independent circuit about all independent circuits as object function, therefore a new algorithm of ventilation network optimization is obtained.

该方法通过使所有独立回路分支风压代数和的平方和最小化的方法，建立了通风网络解算优化模型，并用梯度法对该模型进行解算，获得了一种新的风网解算算法。

In the method, a optimization model of a ventilating network is put forward by taking the minimizing squared sum of algebraic sum of the ventilation pressure of all branches in a independent circuit shoot all independent circuits as object function, therefore a new algorithm of ventilation network optimization is obtained.

该方法通过使所有独立回路分支风压代数和的平方和最小化的方法，建立了通风网络解算优化模型，并用梯度法对该模型进行解算，获得了一种新的风网解算算法。

Our company besides produces the above standard throttling gear, but also produces the present domestic ordinary application each kind of special throttle, like wing anemography installment, ring-like throttle type flowmeter, double repeated passage hamlet anemography installment, 1/4 round spray nozzle, segment of orifice, dual orifices, Inner Tibet orifice, fast tube Flow sensor, jack-in low damaged due to pressing flowmeter, against wall wind pressure thief and so on 30 many kinds of varieties, 1000 many kinds of specifications, caliber from DN10-3000mm, pressure from PN0.01-32MPa, temperature from negative 260℃- 550℃.

我公司除生产上述标准节流装置外，还生产目前国内普通应用的各种特殊的节流件，如机翼型测风装置、环状节流式流量计、双重文丘里测风装置、1/4圆喷嘴、圆缺孔板、双重孔板、内藏孔板、均速管流量传感器、插入式低压损流量计、防墙风压取样器等30多种品种，1000多种规格，管径从DN10-3000mm，压力从PN0.01-32MPa，温度从负260℃-正550℃。

In order to have further information about the degree of concrete carbonization influenced by wind pressure and based on the present theories and researches,the experiment with T-type beam concrete carbonisation accelerated by wind pressure was performed.

为了进一步了解外界风压对混凝土碳化的影响程度，在已有理论分析和矩形混凝土梁碳化实验结果的基础上，进行了T型混凝土梁受风影响的碳化试验研究。

The paper takes the cinder leakage of the circulating fluid bed boiler's air plate as the research topic, carries on the analysis and research in allusion to the seriously cinder leakage reason of the circulating fluid bed boiler in Baotou first thermal power plant.

论文在对循环流化床锅炉布风板严重漏渣原因进行调研和分析的基础上，对一次风室进行了风压、风速测试试验，采用k-ε双方程模型对一次风室的流场进行了数值模拟，并对试验结果和模拟结果进行了分析与研究。

However, more and more studiespresent that the local pressure fluctuations in the separated and reattached region of bluff body are found tobe non-Gaussian. The Gaussian assumption will underestimate the wind load of cladding and cause thecladding to unsafety. It is a general way to estimate peak pressure by a fixed peak factor.

然而，有越来越多的研究表明，钝体绕流的分离和流动再附着区域的风压呈现出强烈的非高斯分布的特性，按照高斯分布进行峰值风压的估计将可能低估作用于围护结构上的风荷载而造成结构的不安全性。

Some parameters, such as blast pressure of Air Supply System, suction pressure of Furnace Chamber, etc., directly influence the boiler combustion and heat transfer.

所涉及的参数如送风系统风压、炉膛负压、烟道负压、制粉系统出力及风压和给粉量等都直接关系到锅炉的燃烧和传热。

Comparisons between the results from the wind tunnel tests, numerical simulations and the field tests were performed to verify the accuracy of the CFD method. Then the advanced k-ε turbulence model was used to compute the mean pressures on a long span curve shaped roof with the front door open or not open.

在核实了数值模拟精度的基础上，运用改进的k-ε湍流模型对某曲面大跨网壳在大门开启和大门关闭两种不同工况下内、外表面的平均风压进行数值模拟研究，并考察了来流风向角和背景建筑对其风压分布的影响。

Proper orthogonal decomposition;large span roof;wind tunnel experiment ; reconstruction of pressure field;prediction of Pressure Field

本征正交分解法；大跨度屋盖；风洞试验；风压场重建；风压场预测

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。