In the vacuum system, the heat radiation is the main factor to affect the temperature of each point of the filament in area source electron gun.
在真空系统中，热辐射是影响面源电子枪灯丝各点温度的主要因素。
Since the numerical integration algorithm can estimate concentrations within the area source, the user can enter any value for the minimum distance.
对于面源范围内部的浓度，模式可以通过数值积分算法进行估算，所以用户可以输入任意小的距离。
A new method of calculating long term mean concentration of air pollutant from area source is proposed by integrating the line source long term mean concentration model.
利用线源长期平均浓度模式对面源的积分得到了一个用风向、风速和稳定度的联合频率计算大气面源长期平均浓度的新算法。
Area source in engineering seismology is such a type of potential earthquake source which the positions and strikes of genetic faults are uncertain.
工程地震学中所指的“面源”属于这样一类潜在震源区——区内发震断层的位置和走向都是不确定的。
The water pollution can be divided into two major categories of point source and area-source pollution according to the different way of discharge.
根据排放方式的不同，水体污染可以分为点源污染和非点源污染两大类。
The water pollution can be divided into two major categories of point source and area-source pollution according to the different way of discharge.
根据排放方式的不同，水体污染可以分为点源污染和非点源污染两大类。
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