backing of the wind是什么意思

用法例句

Moreover,the influence of wind direction,wind speed,weather,seasons and the breakdown in production on the living area′s ordor pollution is discussed.

对炼油厂生活区恶臭问题进行了统计分析,探寻风向、风速、天气、季节和生产故障等因素对生活区恶臭的影响的规律,认为生活区恶臭与炼油厂有一定的关系,在北风或偏北风、风速为1~4。

PM 10 samples from eight wind directions were collected with ACCU(Automatic Cartridge Collection Unit)method for 3 months on one monitoring site in Wusong industry area of Shanghai,and PM 10 concentrations were measured in samples and 18 inorganic elements concentrations were measured by PIXE(proton-induced X-ray emission) method.

[方法 ]在上海市吴淞工业区选择一个监测点 ,使用自动滤式颗粒物收集仪 (automaticcartridgecollectionunit,ACCU)系统进行为期 3个月、8个不同风向的PM10 采样。

CFD numerical simulation coupling with the wind direction frequency weighted(WDFW) method was carried out based on the conditions that were measured.

运用风向频率加权(WDFW)方法,结合大气流动和污染物扩散的CFD模型进行数值模拟计算。

The relationship between surface wind direction and air pollutant concentration in Shanghai is studied.

利用 2 0 0 0年 6月至 2 0 0 2年 1 2月上海地区空气污染物浓度和地面风向资料 ,统计了月平均污染物浓度随偏西风频率的分布 ,两者具有一致的趋势。

The wind direction decision and the uniqueness of the result in the triangle network;

△形网路的风向判别与解的唯一性