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Robotisation of forestry harvesting in China has the potential to achieve great productivity benefits. The paper presents a method which is to recognize tree trunks based on BP neural network. Firstly, the color marks and the training sample data of neutral network have been extracted. Then, the neutral network model is set up. The collecting sample data is used to train the neutral network and get...
In order to improve the contour generation rate in drawing contour maps of rainfall of Tianjin, we propose a contour generation algorithm based on grid sequence, which according to the characteristics of historical data in meteorological field and the contours drawing requirements. Using this algorithm can make the drawing method efficient and intuitive. This algorithm based on Delaunay irregular...
Along with the continuous development of the modernization level of meteorological service, meteorological data has been steadily on the increase, which results in a higher and higher demand of meteorological department for meteorological data storage, management, and read. Through analyzing the framework of Distributed File System, Data Warehouse Tool Hive of the open source cloud platform — Hadoop,...
Hopf bifurcation frequently leads to periodic oscillations and even instability in nonlinear power systems. For Hopf bifurcation at equilibrium point in wind power systems, From the view of the structural stability, the static var compensator control effect on the Hopf bifurcation is analyzed, By tracking Hopf bifurcation point and two-parameter Hopf bifurcation boundary, The influence of the reactive...
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