1mm mainly comes from other place from upper air which occupies 30% of all the city dust.
通过对杭州城市灰尘迁移循环模式和不同粒径质量分布特征分析,表明灰尘的来源和搬运方式有关,灰尘的搬运有悬移、跃移和蠕移,其中粒径小于0。
Environmental pollution of city dust includes dynamical pollution、geographical pollution、substantial pollution、cycle pollution and body pollution etc.
城市灰尘 (Citydust)是指粒径小于 2 0目 (0 。
Spatial variation characteristics of urban dust heavy metal pollution based on geosatistics;
基于地统计学方法的城市灰尘重金属污染的空间变异特征
The urban dusts were polluted by Pb, Zn, Ni which were much higher in the industrial estate, sowntown and busy roads.
研究表明:上海城市灰尘重金属平均含量水平普遍较高,Pb、Cr、Cu、Ni、Zn平均含量分别为273。
This paper is based on a study of the urban dust in Xi'an City,especially the environmental geochemical anomaly of lead in the street dust.
在对西安市城市灰尘研究的基础上,对市区街道灰尘中铅的环境地球化学异常进行研究,一共圈定了5处铅的环境地球化学污染区,包括西新街污染区、安远门污染区、龙首村污染区、纺织城污染区、钟楼污染区。
This article analyses the causes that contribute to gray market and illustrates that gray market phenomenon is a result of the speeding globalization of international trade.
灰色市场是当前国际贸易和知识产权保护的热点问题。
grey market; gray market: Market in Bonds that have not been given a firm price.
灰市: 指未发实盘的债券市
Gray model of predication of overseas tourists in Shenzhen city
深圳市境外游客市场的灰色预测模型
Grey Assessment and Prediction of the Urban Heat Island Effect in Lanzhou City
兰州市城市热岛效应评价与灰色预测
The gray segment represents our market share.
灰色部分显示我们的市场占有额。
The city was reduced to ashes during the war.
战争期间这座城市化为灰烬。
In the summer the town becomes very dusty.
到了夏天,这个城市灰尘弥漫。
Experimental Study on the Melting of Municipal Solid Waste Incineration Fly Ash;
城市垃圾焚烧飞灰熔融处理实验研究
The Study of the Contradictions and Resolve Measures in Urban Riverfront s Grey Region;
城市滨江（河）灰色域矛盾与对策研究
IPTV Market Prediction based on Gray Model(1,1);
基于灰色模型GM(1，1)的IPTV市场预测
Gray Systematic Analysis of Driving Force of the Spatial Expansion;
城市空间规模拓展灰色系统动力分析
Grey Verhulst predictive model for amount of urban freight;
城市货运量的灰色Verhulst预测模型
Gray Co-relation Analysis to Assess the Results of China s Listed Steel Company;
基于灰关联分析的上市公司绩效评价
A Demand Analysis of Real-estate Market Based on Grey Theory;
基于灰色理论的房地产市场需求分析
Grey Comprehensive Algorithm on Multiple Financial System of Public Corporations;
上市公司复合财务系数的灰关联算法
Strategy study on eco-environmental issues of the “Gray Area”in the cities;
城市“灰色区域”特征生态环境问题对策
Accumulation Features and Influencing Mechanism of PGEs in Urban Road Dust
城市道路灰尘PGEs累积特征及影响机制
Physicochemical Characteristics and Its Environmental Effect of Urban Dust from Jinhua
金华城市灰尘的理化特征及环境影响
Prediction of City Water Usage Based on GM(1,1) Model
基于灰色GM(1,1)模型的城市用水量预测