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Chunye Peng,Kyosuke ONO 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.1S
Based on an introduced optimal trajectory planning method, this paper mainly deals with the accuracy analysis during the function approximation process of the optimal trajectory planning method The basis functions are composed of Hermit polynomials and Poulter series to Improve the approximation accuracy Since the approximation accuracy is affected by the given orders of each basis function, the accuracy of the optimal solution is examined by changing the combinations of the orders of Hermit polynomials and Fourier series as the approximation basis functions As a result, It is found that the proper approximation basis functions are the 5th order Hermit polynomials and the 7th-10th order of Fourier series<br/>
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Chunye Lin,Jing Wang,Shaoqing Liu,Mengchang He,Xitao Liu 한국지질과학협의회 2013 Geosciences Journal Vol.17 No.4
The quantitative contamination assessment of toxic elements in sediments is a challenge due to the lack of their geochemical background or baseline levels and sediment heterogeneity. Eighty-eight sediment samples were collected in the Liao River Watershed (LRW) and analyzed for Co, Mn, V, Sc, Fe, Al, and sediment properties. The average background levels, geochemical baseline levels (GBL), and geochemical baseline functions of Co,Mn, and V in the sediments were obtained using statistical and geochemical methodologies. The concentrations of Co, Mn, and V were 0.86 to 23.40, 105.9 to 1771.6, and 6.47 to 153.30 mg/kg, respectively. The average background levels and GBLs were 7.2 and 14.4mg/kg for Co, 422 and 762 mg/kg for Mn, and 35.4 and 59.0 mg/kg for V. The linear correlation of Co, Mn, and V with particle-size proxy elements (normalizers) Sc, Fe, and Al was statistically significant with probability (p-value) <0.001 level, showing that Fe,Al, and Sc can be used as particle-size proxy elements to develop the GBFs of Co, Mn, and V. The spatial distribution of the sampling sites with the concentrations of Co, Mn, and V either outlied or greater than GBLs may be related to industry and mine distribution,showing the impact of human activities on the contents of Co, Mn, and V in the LRW sediments. The procedure in the study can be used to estimate GBLs and construct GBFs of toxic elements in other watershed sediments on the world in order to manage sediment quality. The quantitative contamination assessment of toxic elements in sediments is a challenge due to the lack of their geochemical background or baseline levels and sediment heterogeneity. Eighty-eight sediment samples were collected in the Liao River Watershed (LRW) and analyzed for Co, Mn, V, Sc, Fe, Al, and sediment properties. The average background levels, geochemical baseline levels (GBL), and geochemical baseline functions of Co,Mn, and V in the sediments were obtained using statistical and geochemical methodologies. The concentrations of Co, Mn, and V were 0.86 to 23.40, 105.9 to 1771.6, and 6.47 to 153.30 mg/kg, respectively. The average background levels and GBLs were 7.2 and 14.4mg/kg for Co, 422 and 762 mg/kg for Mn, and 35.4 and 59.0 mg/kg for V. The linear correlation of Co, Mn, and V with particle-size proxy elements (normalizers) Sc, Fe, and Al was statistically significant with probability (p-value) <0.001 level, showing that Fe,Al, and Sc can be used as particle-size proxy elements to develop the GBFs of Co, Mn, and V. The spatial distribution of the sampling sites with the concentrations of Co, Mn, and V either outlied or greater than GBLs may be related to industry and mine distribution,showing the impact of human activities on the contents of Co, Mn, and V in the LRW sediments. The procedure in the study can be used to estimate GBLs and construct GBFs of toxic elements in other watershed sediments on the world in order to manage sediment quality.
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Accelerating the Sweep3D for a Graphic Processor Unit
Gong, Chunye,Liu, Jie,Chen, Haitao,Xie, Jing,Gong, Zhenghu Korea Information Processing Society 2011 Journal of information processing systems Vol.7 No.1
As a powerful and flexible processor, the Graphic Processing Unit (GPU) can offer a great faculty in solving many high-performance computing applications. Sweep3D, which simulates a single group time-independent discrete ordinates (Sn) neutron transport deterministically on 3D Cartesian geometry space, represents the key part of a real ASCI application. The wavefront process for parallel computation in Sweep3D limits the concurrent threads on the GPU. In this paper, we present multi-dimensional optimization methods for Sweep3D, which can be efficiently implemented on the finegrained parallel architecture of the GPU. Our results show that the overall performance of Sweep3D on the CPU-GPU hybrid platform can be improved up to 4.38 times as compared to the CPU-based implementation.
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