防雷的

That is, both numerical simulation and model experiments are complemental to each other. The main point of the thesis are as following:1. Vertical pipe inlet/outlet is simplified as an axisymmetric model in the research, and flow field is simulated with second-moment Reynolds stress model and VOF.

本文的主要工作有： 1、将竖井式进／出水口概化为轴对称模型，应用雷诺应力模型和自由面常采用的VOF法，对抽水和发电工况下竖井扩散段、孔口、防涡梁下的水流流动特性进行了数值模拟。

And, it establishes the computer model with the Scott·Henseleit method, which analyses and optimizes the ventilation network and auto-creates the figures of the evading disaster and succoring disaster with the computer. The paper establishes the GM(1,1) gray forecast model, and forecasts the amount of gasemission of the laneway based on the history data, and then compartmentalizes the danger grade for the laneway. Utilizing the principle and method of cybernetics, the paper brings the feed-forward and feedback. controlling method on the hidden risk in the mine, namely, the double-loop model of forecasting and early- warning. Especially in the feed-forward forecasting, the paper adopts the one unit non-linear regression analysis and forecast method, and forecasts the hidden risk amount in the mine during some time, and compartmentalizes the hidden risk grade based on the history data.

论文中，利用斯考特·亨斯雷法建立计算机模型，对矿井通风系统进行解算和优化调节，并通过计算机自动生成避灾、救灾路线图；建立灰色GM(1，1)预测模型，对巷道瓦斯涌出量进行预测，进而对巷道中的瓦斯事故危险性进行危险等级划分；利用控制论的原理和方法，提出了煤矿通防隐患前馈——反馈控制方法，即预测、预警双环模型，采用一元非线性回归分析预测方法，对煤矿某一段时间内的隐患数量进行预测，并结合历史数据，对当前煤矿隐患排查处理状况划分等级，分别予以管理和控制。

Leahy through "ISO9001" and ISO14001 Certification manufactures and markets pultruded FRP pultruded FRP equipment and raw materials and a variety of cross-section of the grating, closed deck and fasting plate; glass steel platform, ladder and fence series , glass fiber reinforced plastic housing, incubator structure and Canopy: anti-corrosion fillers stent: stent tents; tool bar and tube; pultruded cable tray and stenting: cooling towers with structural profiles: communications base stations using Radome: Highway use the glare panels and guard rails and other clients such as the profiles.

雷易以通过&ISO9001&及ISO14001认证公司生产和销售玻璃钢拉挤设备及拉挤玻璃钢原材料和各种截面的格栅，封闭甲板和空腹板；玻璃钢平台，爬梯和围栏系列，玻璃钢房屋，保温箱结构和雨棚：防腐填料支架：帐篷支架；工具用棒材和管材；拉挤电缆桥架及支架：冷却塔用结构型材：通讯基站用天线罩：高速公路用的防眩板和护栏及其他客户的型材等。

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。