We address the effects of processing parameters on residual stresses and fatigue properties of LY2 Al alloy by laser shock processing （LSP）. Results show that compressive residual stresses are generated near the sur...We address the effects of processing parameters on residual stresses and fatigue properties of LY2 Al alloy by laser shock processing （LSP）. Results show that compressive residual stresses are generated near the surface of samples due to LSP. The maximum compressive residual stress at the surface by two LSP impacts on one side is higher than that by one LSP impact. The maximum value of tensile residual stress is found at the mid-plane of samples subjected to two-sided LSP. Compared with fatigue lives of samples treated by single-sided LSP, lives of those treated by two-sided LSP are lower. However, these are higher than untreated ones.展开更多
With the development of three-dimensional(3D) technology, visual fatigue problems in 3D video have got more attention. In this paper, we combine the human vision characteristics and depth perception theory, and propos...With the development of three-dimensional(3D) technology, visual fatigue problems in 3D video have got more attention. In this paper, we combine the human vision characteristics and depth perception theory, and propose a 3D video visual comfort evaluation method on the consistency of accommodation and convergence, which evaluates the visual comfort from the quantitative perspective under different horizontal disparities and viewing distances. The experimental results show that the proposed evaluation method exhibits good consistency with the subjective assessment results.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos. 50705038and 50735001
文摘We address the effects of processing parameters on residual stresses and fatigue properties of LY2 Al alloy by laser shock processing （LSP）. Results show that compressive residual stresses are generated near the surface of samples due to LSP. The maximum compressive residual stress at the surface by two LSP impacts on one side is higher than that by one LSP impact. The maximum value of tensile residual stress is found at the mid-plane of samples subjected to two-sided LSP. Compared with fatigue lives of samples treated by single-sided LSP, lives of those treated by two-sided LSP are lower. However, these are higher than untreated ones.
基金supported by the National Natural Science Foundation of China(No.61271315)
文摘With the development of three-dimensional(3D) technology, visual fatigue problems in 3D video have got more attention. In this paper, we combine the human vision characteristics and depth perception theory, and propose a 3D video visual comfort evaluation method on the consistency of accommodation and convergence, which evaluates the visual comfort from the quantitative perspective under different horizontal disparities and viewing distances. The experimental results show that the proposed evaluation method exhibits good consistency with the subjective assessment results.
