Based on the data of Lanzhou meteorological observation from 1971 to 2000 and the data from 2001 to 2004,the temporal characteristics and the cause of sand and dust weather in Lanzhou city are analyzed.
The heating rate using WMO dust model is higher 1.5 K/d over desert and 0.2 K/d over the Pacific than those of East Asian dust model because of the strong absorption of WMO dust model.
The parameters considered are the applied high voltage U, the air flow F, and the quantity of dust in air m.
例句来源
The Einstein gravitational equations in the spherically symmetric case and for the dust model (i.e., p = 0) have been studied by several authors.
例句来源
In this case, the mixture area consists of abrasive dust from friction pairs, and the surface film is distributed with crumby hard granules, exiguous oxide, carbide granules and sheared slender fibre.
例句来源
The values of optimal fiber radii are determined from the condition of maximal dust capacity of a filter at given limiting pressure drop and total initial efficiency.
例句来源
On the Possible Existence of Radiation Dust Belts in Near-Earth Space
Elemental concentration relationships of atmospheric aerosols in a rural area of north China are examined. It has been found that the concentrations of those elements due to man-made air pollutants, especially S, are high and are comparable with those often found in the heavily industrialized eastern U. S. and western Europe. The low degree of correlation between the variations of the concentration of particulate S and local weather conditions and the relatively smaller range of concentration variation, com...
In this paper, preliminary results of lidar measurement of aerosol extinction coefficient profiles during two dust storms in March, 1982 are described and analysed.
Considering the fact that the controlling role played toy the volcanic dust is in the change of solar constant rather than in solar activity, we have gathered plenty of information for volcanic eruptions and utilized three sets of data: 1. annual direct radiation of Northern temperate zone from Pivavarova (1977); 2. mean annulal aerosol optical depth between 20 °N and 65°N from Bryson (1980) ; 3. winter-summer mean direct radiation for East China in the last 23 years. We have tried to correct the pion...