A novel compound 5-o-[1-（3-ethoxymethyl-4-phenyl-5-ethoxycarbonyl-6-methyl-3,4-dihydropyrimidin-2-one）butoxy]phenyl-10,15,20-triphenyl zinc porphyrin（C_（65）H_（56）N_6O_5Zn） was synthesized and characterized by ...A novel compound 5-o-[1-（3-ethoxymethyl-4-phenyl-5-ethoxycarbonyl-6-methyl-3,4-dihydropyrimidin-2-one）butoxy]phenyl-10,15,20-triphenyl zinc porphyrin（C_（65）H_（56）N_6O_5Zn） was synthesized and characterized by NMR,FT-IR and MS. The compound crystallizes out from chloroform and methanol mixture solution,and its crystal structure was measured by single-crystal X-ray diffraction,monoclinic system,space group P2_1/c with a = 17.2741（6）,b = 16.3797（6）,c = 41.0919（16） A,b = 93.810（3）°,V = 11601.0（7） A^3,Z = 4,S = 1.021,F（000） = 5000,R = 0.0749 and wR = 0.1771. Additionally,it has been revealed by X-ray analysis that Zn of porphyrin is coordinated with carbonyl O of dihydropyrimidinone,thus the porphyrin and pyrimidinone rings are distorted by the Zn–O coordination bond.展开更多
The number of layers and the resolution of liquid crystal displays （LCDs） limit the reconstruction fidelity of near- eye light field displays based on multilayer LCDs. Because the eye＇s resolution capability is dif...The number of layers and the resolution of liquid crystal displays （LCDs） limit the reconstruction fidelity of near- eye light field displays based on multilayer LCDs. Because the eye＇s resolution capability is different for central vision and peripheral vision, the fidelity can be improved by setting different weights for different areas. First we employ the eye＇s modulation transfer function （MTF） to acquire the limiting resolution angle. Then, due to the inverse relationship between the limiting angle and the weight values, the weighted function related to retinal eccentricity is calculated. In combination with the linear least-squares algorithm, the peak signal-to-noise ratio （PSNR） of the reconstructed scene is raised. The simulation results indicate that the weighted optimization algorithm can improve the image fidelity and reconstruction accuracy.展开更多
基金supported by the National Natural Science Foundation of China(Nos.20942008,21172065)the Scientific Research Fund of Hunan Provincial Education Department(No.11K024)
文摘A novel compound 5-o-[1-（3-ethoxymethyl-4-phenyl-5-ethoxycarbonyl-6-methyl-3,4-dihydropyrimidin-2-one）butoxy]phenyl-10,15,20-triphenyl zinc porphyrin（C_（65）H_（56）N_6O_5Zn） was synthesized and characterized by NMR,FT-IR and MS. The compound crystallizes out from chloroform and methanol mixture solution,and its crystal structure was measured by single-crystal X-ray diffraction,monoclinic system,space group P2_1/c with a = 17.2741（6）,b = 16.3797（6）,c = 41.0919（16） A,b = 93.810（3）°,V = 11601.0（7） A^3,Z = 4,S = 1.021,F（000） = 5000,R = 0.0749 and wR = 0.1771. Additionally,it has been revealed by X-ray analysis that Zn of porphyrin is coordinated with carbonyl O of dihydropyrimidinone,thus the porphyrin and pyrimidinone rings are distorted by the Zn–O coordination bond.
基金supported by the National Natural Science Foundation of China(No.61177015)the National 973 Program of China(No.2013CB328802)the National 863 Program of China(No.2015AA015904)
文摘The number of layers and the resolution of liquid crystal displays （LCDs） limit the reconstruction fidelity of near- eye light field displays based on multilayer LCDs. Because the eye＇s resolution capability is different for central vision and peripheral vision, the fidelity can be improved by setting different weights for different areas. First we employ the eye＇s modulation transfer function （MTF） to acquire the limiting resolution angle. Then, due to the inverse relationship between the limiting angle and the weight values, the weighted function related to retinal eccentricity is calculated. In combination with the linear least-squares algorithm, the peak signal-to-noise ratio （PSNR） of the reconstructed scene is raised. The simulation results indicate that the weighted optimization algorithm can improve the image fidelity and reconstruction accuracy.
