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In order to take advantage of wind resource which is not rich in Shaanxi northern region and the annual average wind velocity is a little more than 4m/s, this paper focused on researching the comparison of theoretical potential application of vertical axis wind turbines (VAWT) and horizontal axis wind turbines (HAWT) in Northern Shaanxi. Wind velocity distributions were calculated by the Rayleigh distribution method based on local meteorological data in Yulin and Yan'an where the most common wind velocity is 3 or 4m/s. Then this paper based on the working characteristics of 600W permanent magnet generator, simulated the working performances of VAWT and compared with traditional HAWT. The results showed that more than 70 percent wind resource concentrated at wind speed ranged is from 3m/s to 8m/s, working hours of VAWT were more than 2000 hours in a year, and electricity generated of VAWT was over 50 percent more than traditional HAWT. Thus, although the aerodynamic performances of the vertical axis wind turbine are less efficient, we can conclude that VAWT have higher torque, less starting wind speed which will be more effective to match wind resource distribution of North Shaanxi and have more potential applications than HAWT. Vertical axis wind turbine; horizontal axis wind turbine; wind power; windI.

According to the error of the data processing algorithm applied in the GPS positioning system which is applied in agricultural machinery especially in combine harvester, the application of ARM processor is used as the data processing module and the geographical positioning information is collected by GPS module. In this paper, using dynamic Kalman Filtering algorithm based on model transformation which reduces the fluctuation range of latitude and longitude from 0.0006 and 0.0005 to 0.0003 and 0.0003. The data can be displayed by touch screen and using positioning information and path planning algorithm can realize aided-navigation and calculation of course deviation.

The thesis is based on the following set of research papers. Papers underlying this thesis[1] Cooperative sequencing games with position-dependent learning effect, Op-

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