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熱門關鍵詞：防風抑塵網、防塵網、防風網、防風牆、防塵板、防塵牆、煤场防塵網、電廠防風網

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確定防風網设计方案的 5个步骤

確定防風網设计方案的 5个步骤（procedure)如下：

第一步：在现场调查分析的基础上，根据堆场的大小、形状和当地的风向、风频等气象条件初步確定若干个防風網初步方案

第二步：用大尺度的数值模拟(定义:对真实事物或者过程的虚拟)计算方法对各种方案进行初选，收缩方案范围。防風牆主要用于煤矿，焦化厂，电厂等企业工厂的储煤厂的防风抑尘；港口，码头储煤厂及各种料场；钢铁、建材、水泥等企业各种露天料场的抑尘；农作物防风，沙化天气防尘等恶劣环境；铁路、公路煤炭集运站储煤场、建筑工地、道路扬尘、高速公路两侧等。单层擋風抑塵牆抑尘效果可达65～85%，双层擋風抑塵牆效果可达95%以上。防風網是利用空氣動力學原理，按照實施現場環境風洞實驗結果加工成一定幾何形狀、防風抑塵網成型寬度在250mm--500mm之間，峰高50mm--100mm,長度在6米之內都可以加工。板材厚度0.5mm--1.5mm,在以上範圍之內，可以根據客戶的要求進行加工制作。防塵網材質及表面處理：對不同防風網平面布置方案和不同高度方案进行不同气象条件下的数值模拟，主要计算结果是各种方

案对静态煤堆场的抑尘率；通过对抑尘率的分析(Analyse)进行防風網布置方案和高度方案的初选，并指导下一步的物理模型试验研究（research)工作

第三步：通過防風網空气动力技术物模试验（风洞试验）研究（research)確定部分防風網建设方案的效果

第四步：通過防風網数值模拟(定义:对真实事物或者过程的虚拟)与风洞试验对比研究（research)验证(Experimental)和修正数值模型，提高模型模拟精度（精确度）

第五步：利用修正后的精确的数值模型进行防風網建设方案的最终优化

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Hundreds of pigeons were circling around the temple, or walking among the people that thronged the street. Nobody showed the slightest intention of harming them, and the consequence was they were very tame. Several stands were devoted to the sale of grain for the birds; and the sharp-eyed pigeons knew, when they saw the three strangers halt in front of one of the stands, that there was good prospect of a free breakfast. The Doctor bought a quart or more of the grain and threw it out upon the ground. Instantly there was a whirring of wings in the air, and in less time than it takes to say so the grain was devoured. The birds were rather shy of the visitors, and possibly it had been whispered to them that the foreigner likes his pigeons broiled or served up in pies. But they did not display any such timidity when the natives approached them. Some of the Japanese temples are the homes of a great number of pigeons, and in this respect they resemble the mosques at Constantinople and other Moslem cities. "Don't swallow him," said Ferry, smilingly, "this isn't your private war." "Ah, yes, yes!" she said, "they know all we can tell them and all we can't!" LIX UNDER CHARLOTTE'S WINDOW Hetty caught her breath eagerly. That dark and evil place seemed to have suddenly become part and parcel of her life. Instinctively she half hid herself behind a great dragon vase full of palms. The auxiliary departments, if disposed about an erecting shop in the centre, should be so arranged that material which has to pass through two or more departments can do so in the order of the processes, and without having to cross the erecting shop. Casting, boring, planing, drilling, and fitting, for example, should follow each other, and the different departments be arranged accordingly; whenever a casting is moved twice over the same course, it shows fault of arrangement and useless expense. The same rule applies to all kinds of material. To sum up, it is supposed to have been determined by inductive reasoning, coupled with some knowledge of mechanics, that a steam hammer, to give a dead blow, requires the following conditions in the valve gearing: CHAPTER V. PLATO AS A REFORMER. A station on the road—the delightful days at Bunnoo left far behind. The liaisons of Mme. Tallien had nothing doubtful about them. The taste of the day was expressed in the pictures of the favourite artists, Watteau and Greuze, who painted the graceful groups and landscapes every one admired: charming women sitting in beautiful gardens dressed in costumes suitable for a ball or court festivity, or anything on earth but being out of doors in the country. For the answer they had to wait till dark. CHAPTER XXXIV THE EMERALDS ARE FOUND On the next day they were in the flat, nearing the post. There was a dust storm. Earlier in the morning the air had grown suddenly more dry, more close and lifeless than ever, suffocating, and a yellow cloud had come in the western sky. Then a hot wind began to blow the horses' manes and tails, to snarl through the greasewood bushes, and to snap the loose ends of the men's handkerchiefs sharply. The cloud had thinned and spread, high up in the sky, and the light had become almost that of a sullen evening. Black bits floated and whirled high overhead, and birds beat about in the gale. Gradually the gale and the dust had dropped nearer to the earth, a sand mist had gone into every pore and choked and parched. And now the tepid, thick wind was moaning across the plain, meeting no point of resistance anywhere. Ellton answered "Very good," and they went out, locking the door. "The masters are good," Cadnan said stolidly into the silence. "They let me work." "He's a nice lad, ain't he?" "I—I—the hay seemed right enough." HoME 日韩欧美一级免费一级欧美大黄ENTER NUMBET 003www.shanggaonews.com.cn
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