Among the present three types of electric field-induced luminescence we noticed similarities between the inorganic and organic materials in electric field intensity. In this high electric field range SiO2 has three fu...Among the present three types of electric field-induced luminescence we noticed similarities between the inorganic and organic materials in electric field intensity. In this high electric field range SiO2 has three functions: acceleration, excitation and multiplication of electrons. Based on the acceleration effect, cathodoluminescence-like emission of organic molecules and polymers was found. By using the three functions of SiO2 or II-VI compounds and the heterojunction of inorganic and organic material we realized different variants of mixed excitation in electroluminescence.展开更多
A novel inorganic-organic hybrid compound, {[Co（dien）]4[0aO4）MoV8（wV10.56MoV10.44）4- O33（OH）3]}＇nH20 （1, n = 1, dien = diethylenetriamine）, has been synthesized hydrothermally and characterized by single-cry...A novel inorganic-organic hybrid compound, {[Co（dien）]4[0aO4）MoV8（wV10.56MoV10.44）4- O33（OH）3]}＇nH20 （1, n = 1, dien = diethylenetriamine）, has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system with a = 11.927（2）, b = 13.328（3）, c = 19.306（4）A, a = 93.76（3）, β = 94.14（3）, γ = 109.99（3）°, V= 2863.2（12） A3, space group P1 and Z = 2 at 173 K. The final full-matrix least-squares refinement converged to R = 0.049 for 9621 observed reflections with 1 〉 2σ（I） and wR = 0.139 for all data （9871） and S = 1.073. Crystal structure analysis shows that 1 contains a kind of the first reported mixed-valence and molybdenum-tungsten mixed-distributed e-Keggin structural polyanion capped by four Co（dien） fragments with the main group element P occupying the center site. These results were further confirmed by energy-dispersive X-ray spectroscopy （EDS）, X-ray powder diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR）, Raman spectroscopy, Thermogravimetry （TG） and X-ray photoelectron spectroscopy （XPS） analyses.展开更多
[目的]在有机无机混合肥料仿真试验中,传统参数标定方法待标定参数多,标定过程复杂。本文根据有机肥对无机肥颗粒黏附特性,提出一种新的离散元仿真接触参数标定方法。[方法]利用自由落体碰撞试验、静摩擦试验、滚动摩擦试验对复合小球...[目的]在有机无机混合肥料仿真试验中,传统参数标定方法待标定参数多,标定过程复杂。本文根据有机肥对无机肥颗粒黏附特性,提出一种新的离散元仿真接触参数标定方法。[方法]利用自由落体碰撞试验、静摩擦试验、滚动摩擦试验对复合小球和钢的接触参数进行校准;设计Plackett-Burmen Design试验、爬坡试验和Box-Behnken响应面试验,得到混合肥料接触模型最优参数,通过堆积角对比试验、有机肥和无机肥混合比例预测试验、撒肥盘颗粒分布对比试验验证最优参数。[结果]复合小球与钢的最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.323、0.776、0.255;有机肥肥料之间最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.40、0.70、0.14;有机肥与钢板之间的最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.44、0.70、0.15;Hertz-Mindlin with JKR模型参数为0.017。最优参数进行对比验证堆积角的相对误差为1.05%,最优参数能预测不同混合比例肥料的堆积角,撒肥盘抛撒试验列分布最大相对误差为35.95%,平均误差15.86%。[结论]试验结果验证了标定方法正确性,同时为后续有机肥-无机肥-机械互作系统研究提供依据。展开更多
基金Project was supported by the National Natural Science Foundation of China (Grant No. 29992530 and 19974002).
文摘Among the present three types of electric field-induced luminescence we noticed similarities between the inorganic and organic materials in electric field intensity. In this high electric field range SiO2 has three functions: acceleration, excitation and multiplication of electrons. Based on the acceleration effect, cathodoluminescence-like emission of organic molecules and polymers was found. By using the three functions of SiO2 or II-VI compounds and the heterojunction of inorganic and organic material we realized different variants of mixed excitation in electroluminescence.
基金Foundation of Education Department of Fujian Province(Nos.JA11245 and JB12199)National Natural Science Foundation of China(No.40972035)
文摘A novel inorganic-organic hybrid compound, {[Co（dien）]4[0aO4）MoV8（wV10.56MoV10.44）4- O33（OH）3]}＇nH20 （1, n = 1, dien = diethylenetriamine）, has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system with a = 11.927（2）, b = 13.328（3）, c = 19.306（4）A, a = 93.76（3）, β = 94.14（3）, γ = 109.99（3）°, V= 2863.2（12） A3, space group P1 and Z = 2 at 173 K. The final full-matrix least-squares refinement converged to R = 0.049 for 9621 observed reflections with 1 〉 2σ（I） and wR = 0.139 for all data （9871） and S = 1.073. Crystal structure analysis shows that 1 contains a kind of the first reported mixed-valence and molybdenum-tungsten mixed-distributed e-Keggin structural polyanion capped by four Co（dien） fragments with the main group element P occupying the center site. These results were further confirmed by energy-dispersive X-ray spectroscopy （EDS）, X-ray powder diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR）, Raman spectroscopy, Thermogravimetry （TG） and X-ray photoelectron spectroscopy （XPS） analyses.
文摘[目的]在有机无机混合肥料仿真试验中,传统参数标定方法待标定参数多,标定过程复杂。本文根据有机肥对无机肥颗粒黏附特性,提出一种新的离散元仿真接触参数标定方法。[方法]利用自由落体碰撞试验、静摩擦试验、滚动摩擦试验对复合小球和钢的接触参数进行校准;设计Plackett-Burmen Design试验、爬坡试验和Box-Behnken响应面试验,得到混合肥料接触模型最优参数,通过堆积角对比试验、有机肥和无机肥混合比例预测试验、撒肥盘颗粒分布对比试验验证最优参数。[结果]复合小球与钢的最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.323、0.776、0.255;有机肥肥料之间最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.40、0.70、0.14;有机肥与钢板之间的最优碰撞恢复系数、静摩擦系数和滚动摩擦系数分别为0.44、0.70、0.15;Hertz-Mindlin with JKR模型参数为0.017。最优参数进行对比验证堆积角的相对误差为1.05%,最优参数能预测不同混合比例肥料的堆积角,撒肥盘抛撒试验列分布最大相对误差为35.95%,平均误差15.86%。[结论]试验结果验证了标定方法正确性,同时为后续有机肥-无机肥-机械互作系统研究提供依据。
