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Soil Moisture Content (SMC) plays an important role in different environmental studies. In this study, to assess SMC, a method based on reflectance values in red and NIR bands from HJ-1B is introduced. This model divides SNIR-R into three separate regions based on the pixels NDVI values and fits three different regression equations to each region. All the achieved results showed that as NDVI values...
Based on the grain production data and agriculture statistical data from 1995 to 2005, factors of grain production in China is discussed by the model of gray correlative analysis. The results show that Consumption of chemical fertilizers, Effective irrigated area, grain sown area and stricken area, Total power of agriculture machinery are the most important factors that affect grain production. To...
The global commercial crisis caused new problems and new challenges to the fire departments of China. This paper selected the parameters, which could reflect the fire development of current fire situation, including the number of fire event cases, the number of injured and died, and the direct economic losses of fire, and then using gray GM(1,1) prediction model to analysis the fire development trend...
Microstrip transmission line has some unique filter characteristics. This paper analyses filter characteristics of two kinds of parallel transmission line with specified length on basis of Y parameter theory. Loa-pass filter Matlab and Pspice software simulation proves the correctness of the analysis. Due to the advantages of simple structure and easy integration, parallel transmission lines can be...
Projectiles in coil gun usually make one-way movement and move at a very high speed. The device would be fit for the application of oil pumping unit, as long as the projectiles can make reciprocating movement and move slower by adopting proper control methods. At present, during the production process of petroleum, the efficiency of the system is rather low. Energy dissipation takes a considerable...
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