污染源清单的建立是目前城市大气污染浓度预报中的一大障碍。
The making an investigation of air pollution sources is a difficult thing for prediction of urban air quality.
计算结果可为大气污染浓度的计算，大气污染防治，及环境规划等提供参考依据。
The calculated result could be used as reference for calculating pollution concentration, preventing atmospheric pollution and environmental planning etc.
论述了微风条件下城市街道峡谷中的大气污染浓度变化与路面温度、街道空间结构及风等的关系。
The article discussed under the breeze weather in the city street canyon air pollution concentration's relationship with the pavement temperature, street space structure and wind et al.
近年来将BP网络模型应用到大气污染浓度预报中，并建立了大气污染物浓度的神经网络预报模型。
Recent years, BP model has been applied to atmospheric pollution forecast, a neural network prediction model of atmospheric pollutant concentration is set up.
Witte提醒道：“官方取消交通管制措施后，大气污染物浓度旋即反弹上扬。”
"After the authorities lifted the traffic restrictions, the levels of these pollutants shot right back up," Witte noted.
在成因分析的基础上，建立了大气污染物浓度预测的参数化组合算子模型，适应非线性问题。
Based on the analysis of contributing factors, a model of parameterized combination operator in air pollution forecasting is presented, which is suitable to nonlinear problems.
本章论述几种有关各种排放源的大气污染物浓度分布的估算方法。
This chapter describes methods of estimating airborne pollutant concentration distributions associated with various emission sources.
结果：分析归纳了舱室大气污染的主要途径及浓度变化规律；提出了舱室大气质量控制建议。
Results: The main channel of atmospheric pollution and the law governing the changes in concentration were summed up and a proposal for the control of air quality in the compartments was advanced.
颗粒物是北京市大气污染的首要污染物，其中交通扬尘对颗粒物浓度的贡献较大。
Particulate matter, a large proportion of road dust, is the chief pollutant of atmosphere pollution in Beijing.
目的根据区域大气污染源分布研究确定区域大气污染物历史暴露浓度，确定健康调查工作范围。
Objective to study distribution of air pollution source, determine the historical exposure concentration of air pollution in the region, and assure the work scope of health investigation.
通过分析大气中主要污染物浓度的时空变化，阐明形成此规律的原因，对大气污染物的预测和防治具有一定意义。
Through analysis of concentration change with time and space of mian air pollutants, some causes of the change regularity are expounded, being useful for pollution forecasting and control.
这里利用成熟的室外大气污染物扩散理论- 梯度输送理论和箱模式理论，提出焊接烟尘在室内的扩散模式和浓度分布的理论计算方法。
In this paper, the diffusion model and the theoretic calculation method of welding dust are given by gradient transportation theory and box model for outdoor atmospheric pollutants.
方法用多源扩散数学模型计算健康调查区域内的大气污染物历史暴露浓度。
Methods The air pollutant exposure concentration in history were calculated with the multi - source proliferation mathematical model.
结论利用多源扩散数学模型是研究健康调查区域内大气污染物历史暴露浓度的一种可行方法。
Conclusion It is an effective method to use multi - source proliferation mathematical model for studying the pollutants exposure concentration in atmosphere of the health survey region in history.
分析发现，随着大气中CO2浓度的升高，混凝土碳化速度系数不再是一个恒定的量，而是随时间延长不断增大，表明大气污染会加剧混凝土的碳化。
It is found that the carbonization velocity coefficient will not be constant but increased with the elevation of CO2 concentrations resulted from the air pollution.
本文就大气污染物浓度的时间分布、空间分布(包括平面分布和铅直分布)的规律及其原因进行了阐述和分析。
The regularity and reasons of time-space distribution (including horizontal distribution and vertical distribution) of the concentration of pollutants in atmosphere are related and analyzed.
阐述了主要大气污染物“达标排放”（浓度控制）和“总量控制”之间的联系和区别；
This paper describes the relation and difference of "emission up to standards" and "total quantity control" of main atmospheric pollutants, as well as their legal status.
分析了该模型的可靠性，并从理论的角度探讨了大气污染引起的大气co2浓度升高对混凝土碳化深度的影响。
By verifying the validity of the theoretical carbonization model with published test data, this paper analyzes the effects of CO2 increase due to air pollution on the concrete carbonization.
分析了该模型的可靠性，并从理论的角度探讨了大气污染引起的大气co2浓度升高对混凝土碳化深度的影响。
By verifying the validity of the theoretical carbonization model with published test data, this paper analyzes the effects of CO2 increase due to air pollution on the concrete carbonization.
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