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Findings from C.Y. Wu and Co-Researchers Provides New Data on Biosystems Engineering

May 14, 2014

By a News Reporter-Staff News Editor at Journal of Engineering -- New research on Biosystems Engineering is the subject of a report. According to news reporting originating in Hangzhou, People's Republic of China, by VerticalNews journalists, research stated, "Vibratory harvest is the most appropriate and efficient way to harvest Chinese hickory (Carya cathayensis Sarg.) nuts because of the hilly growth environment and scattered shooting architecture. To develop a mechanical harvester that can be adapted to different Chinese hickory trees, a three-dimensional (3D) model of the tree should be obtained and its dynamics parameters identified."

The news reporters obtained a quote from the research, "This paper introduces an approach to reconstruct a 3D Chinese hickory tree without foliage using two images with different view angles, and then illustrates a dynamics analysis for the reconstructed tree. Two-dimensional (2D) branches were roughly segmented from the image by the 'stripe programming' method, and refined by the ribbon snake model. After extracting the skeleton of 2D branches, a binary-directed tree representing 2D tree structure was established. Under the topology and epipolar constraints, the branch correspondences between two images could be easily found. To improve the accuracy, curve reconstruction under the minimum curvature constraint instead of point-based reconstruction was employed. The diameters of branches from the base to the tip were parameterised as a linear equation. Using the 3D model of the Chinese hickory tree, its dynamics analysis was solved by finite element software (ANSYS Workbench). Compared with the results of the impact tests, a predicted optimal vibration frequency of trunk shaker can be found eventually."

According to the news reporters, the research concluded: "It indicates that dynamics analysis using 3D model of tree reconstructed by the proposed method is effective."

For more information on this research see: 3D reconstruction of Chinese hickory tree for dynamics analysis. Biosystems Engineering, 2014;119():69-79. Biosystems Engineering can be contacted at: Academic Press Inc Elsevier Science, 525 B St, Ste 1900, San Diego, CA 92101-4495, USA. (Elsevier -; Biosystems Engineering -

Our news correspondents report that additional information may be obtained by contacting C.Y. Wu, Zhejiang Prov Key Lab Transplanting Equipment & T, Hangzhou, Zhejiang, People's Republic of China. Additional authors for this research include L.Y. He, X.Q. Du, S.Z. Chen and K.N. Ni.

Keywords for this news article include: Asia, Hangzhou, Biosystems Engineering, People's Republic of China

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Source: Journal of Engineering

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