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Curvature-Driven Forces Based on Natural Exponential Pair Potential at Micro/Nanoscales
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作者 Dan Wang Yajun Yin +1 位作者 Zheng Zhong Zhili Hu 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2019年第2期133-147,共15页
The natural exponential potential (Ce^R/λ0) widely exists at micro/nanoscales;this paper studies the interaction potential between a curved-surface body and an outside particle base on the natural exponential potenti... The natural exponential potential (Ce^R/λ0) widely exists at micro/nanoscales;this paper studies the interaction potential between a curved-surface body and an outside particle base on the natural exponential potential. Mat hematical derivation proves t hat the int er act ion potential can be expressed as a function of curvatures. Then, idealized numerical experiments are designed to verify the accuracy of the curvature-based potential. The driving forces exerted on the particle are discussed and confirmed to be a function of curvatures and the gradient of curvatures, which may explain some abnormal movements at micro/nanoscales. 展开更多
关键词 Micro/nanoscales curvature-driven FORCES NATURAL EXPONENTIAL pair POTENTIAL Curvature-based POTENTIAL
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Gradient based restoration of coal mine images obtained by underground wireless transmissions 被引量:2
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作者 Lu Zhaolin Qian Jiansheng Li Leida 《Mining Science and Technology》 EI CAS 2011年第6期809-813,共5页
Curvature-driven diffusion (CDD) principles were used to develop a novel gradient based image restora- tion algorithm. The algorithm fills in blocks of missing data in a wireless image after transmission through the n... Curvature-driven diffusion (CDD) principles were used to develop a novel gradient based image restora- tion algorithm. The algorithm fills in blocks of missing data in a wireless image after transmission through the network. When images are transmitted over fading channels, especially in the severe circum- stances of a coal mine, blocks of the image may be destroyed by the effects of noise. Instead of using com- mon retransmission query protocols the lost data is reconstructed by using the adaptive curvature-driven diffusion (ACDD) image restoration algorithm in the gradient domain of the destroyed image. Missing blocks are restored by the method in two steps: In step one, the missing blocks are filled in the gradient domain by the ACDD algorithm; in step two, and the image is reconstructed from the reformed gradients by solving a Poisson equation. The proposed method eliminates the staircase effect and accelerates the convergence rate. This is demonstrated by experimental results. 展开更多
关键词 Image restoration curvature-driven diffusion Gradient domain Wireless image transmission Poisson equation
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