通过固相法制备了1.5Li2O-P2O5-xTiO2(x=0.1、0.2…0.9)玻璃以及微晶玻璃快离子导体。对制备的玻璃以及微晶玻璃分别进行了交流阻抗和充放电电化学性能等测试。结果表明,1.5Li2O-P2O5-xTiO2微晶玻璃导电率比对应的玻璃导电率要高,最高为...通过固相法制备了1.5Li2O-P2O5-xTiO2(x=0.1、0.2…0.9)玻璃以及微晶玻璃快离子导体。对制备的玻璃以及微晶玻璃分别进行了交流阻抗和充放电电化学性能等测试。结果表明,1.5Li2O-P2O5-xTiO2微晶玻璃导电率比对应的玻璃导电率要高,最高为1.77×10-6S/cm,二者的导电率都随TiO2含量的增加而增加,而且1.5Li2O-P2O5-xTiO2微晶玻璃作为锂离子电池负极充放电性能比对应的玻璃充放电性能要好,但是二者总体充放电性能不佳,最高首次放电比容量为283 mAh g-1。展开更多
A new acylated flavonoid glycoside, 3-O-kaempferol-3-O-acetyl-6-O-(p-coumaroyl)-- D-glucopyranoside 1 was isolated from the whole plant of Anaphalis aureo-punctata. The structure was established by spectral methods.
A series of(Y_(1-y), Gdy)_(0.95-x)(P_y, V_(1-y))O_4 :0.05Eu^(3+), xBi^(3+)+phosphors have been successfully prepared by a subsection method. The crystal structure, surface morphology and luminescence properties were i...A series of(Y_(1-y), Gdy)_(0.95-x)(P_y, V_(1-y))O_4 :0.05Eu^(3+), xBi^(3+)+phosphors have been successfully prepared by a subsection method. The crystal structure, surface morphology and luminescence properties were investigated. It was found that the sintered samples crystallized in a tetragonal crystal system with space group I_(41)/amd(a = b = 0.7119 nm, c = 0.6290 nm). The products presented rod-like morphology with length of 100-150 nm and width of 50-100 nm. A maximum peak at 619 nm(~5D_0 →~7F_2) was observed in emission spectrum of the phosphors. It was also found that co-doping of Bi^(3+)+, P5+and Gd^(3+)ions into YVO_4:Eu^(3+)can not only made the right edge of the excitation band shift to the long-wavelength region, but also increased the emission intensity at 619 nm sharply and decreased the lifetime of fluorescence decay. These results may expand the application scope of the phosphors.展开更多
在众多MPPT算法中,扰动观察法(Perturb and Observe,P&O)因结构简单、实现便捷而被广泛应用。然而,传统的P&O算法在实际应用中暴露出一些不足,如收敛速度较慢、系统效率不高以及在最大功率点附近容易产生震荡等问题。针对这些缺...在众多MPPT算法中,扰动观察法(Perturb and Observe,P&O)因结构简单、实现便捷而被广泛应用。然而,传统的P&O算法在实际应用中暴露出一些不足,如收敛速度较慢、系统效率不高以及在最大功率点附近容易产生震荡等问题。针对这些缺陷,提出自适应变步长优化算法和基于大步长扰动的P&O的优化策略,以提高其整体效率和稳定性,为光伏发电系统的实际应用提供更可靠的技术支持。展开更多
文摘通过固相法制备了1.5Li2O-P2O5-xTiO2(x=0.1、0.2…0.9)玻璃以及微晶玻璃快离子导体。对制备的玻璃以及微晶玻璃分别进行了交流阻抗和充放电电化学性能等测试。结果表明,1.5Li2O-P2O5-xTiO2微晶玻璃导电率比对应的玻璃导电率要高,最高为1.77×10-6S/cm,二者的导电率都随TiO2含量的增加而增加,而且1.5Li2O-P2O5-xTiO2微晶玻璃作为锂离子电池负极充放电性能比对应的玻璃充放电性能要好,但是二者总体充放电性能不佳,最高首次放电比容量为283 mAh g-1。
文摘A new acylated flavonoid glycoside, 3-O-kaempferol-3-O-acetyl-6-O-(p-coumaroyl)-- D-glucopyranoside 1 was isolated from the whole plant of Anaphalis aureo-punctata. The structure was established by spectral methods.
基金supported by the Program for New Material Development & Application innovative Research Team of Higher Education in Chong Qing of China (Grant No. 201042)
文摘A series of(Y_(1-y), Gdy)_(0.95-x)(P_y, V_(1-y))O_4 :0.05Eu^(3+), xBi^(3+)+phosphors have been successfully prepared by a subsection method. The crystal structure, surface morphology and luminescence properties were investigated. It was found that the sintered samples crystallized in a tetragonal crystal system with space group I_(41)/amd(a = b = 0.7119 nm, c = 0.6290 nm). The products presented rod-like morphology with length of 100-150 nm and width of 50-100 nm. A maximum peak at 619 nm(~5D_0 →~7F_2) was observed in emission spectrum of the phosphors. It was also found that co-doping of Bi^(3+)+, P5+and Gd^(3+)ions into YVO_4:Eu^(3+)can not only made the right edge of the excitation band shift to the long-wavelength region, but also increased the emission intensity at 619 nm sharply and decreased the lifetime of fluorescence decay. These results may expand the application scope of the phosphors.
文摘在众多MPPT算法中,扰动观察法(Perturb and Observe,P&O)因结构简单、实现便捷而被广泛应用。然而,传统的P&O算法在实际应用中暴露出一些不足,如收敛速度较慢、系统效率不高以及在最大功率点附近容易产生震荡等问题。针对这些缺陷,提出自适应变步长优化算法和基于大步长扰动的P&O的优化策略,以提高其整体效率和稳定性,为光伏发电系统的实际应用提供更可靠的技术支持。
