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101.
I. A. Vaseva V. D. Liseikin Yu. V. Likhanova Yu. N. Morokov 《Computational Mathematics and Mathematical Physics》2008,48(9):1600-1619
New results concerning the development of a universal method for grid generation based on the numerical solution of the inverted Beltrami and diffusion equations with respect to the monitor metric are obtained. In order to build monitor metrics, layer-type functions are used. Algorithms for generating smoothly matched block grids are proposed. Examples of two-and three-dimensional grids for the tokamak edge region, for calculation of a passive impurity in the atmosphere, and for the numerical solution of two-dimensional singularly perturbed problems are presented. 相似文献
102.
We report an MoO3/Ag/Al/ZnO intermediate layer connecting two identical bulk heterojunction subcells with a poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT and PCBM) active layer for inverted tan- dem polymer solar cells. The highly transparent intermediate layer with an optimized thickness realizes an Ohmic contact between the two subcells for effective charge extraction and recombination. A maximum power conversion efficiency of 3.76% is obtained for the tandem cell under 100 mW/cm2 illumination, which is larger than that of a single cell (3.15%). The open-circuit voltage of the tandem cell (1.18 V) approaches double that of the single cell (0.61 V). 相似文献
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104.
TingBin Yang DongHuan Qin LinFeng Lan WenBo Huang Xiong Gong JunBiao Peng Yong Cao 《中国科学:化学(英文版)》2012,55(5):755-759
A solution-processed zinc oxide (ZnO) thin film as an electron collection layer for polymer solar cells (PSCs) with an inverted device structure was investigated. Power conversion efficiencies (PCEs) of PSCs made with a blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) are 3.50% and 1.21% for PSCs with and without the ZnO thin film, respectively. Light intensity dependence of the photocurrent and the capacitance-voltage measurement demonstrate that the increased PCEs are due to the restriction of the strong bimolecular recombination in the interface when a thin ZnO layer is inserted between the polymer active layer and the ITO electrode. These results demonstrate that the ZnO thin film plays an important role in the performance of PSCs with an inverted device structure. 相似文献
105.
以倒立摆台车系统为研究对象,将系统状态分成两组,构造出一种双层滑动面,给出一种基于滑模控制的非线性控制律,并设计了控制器参数.然后采用Lyapunov方法,证明了各级滑动平面的稳定性,实现了台车在水平方向位置及摆角的渐近跟踪. 相似文献
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108.
Eduardo Bayro-Corrochano 《Numerical Algorithms》2005,39(1-3):35-55
This paper presents the theory and practicalities of the quaternion wavelet transform. The contribution of this work is to generalize the real and complex wavelet transforms and to derive for the first time a quaternionic wavelet pyramid for multi-resolution analysis using the quaternion phase concept. The three quaternion phase components of the detail wavelet filters together with a confidence mask are used for the computation of a denser image velocity field which is updated through various levels of a multi-resolution pyramid. Our local model computes the motion by the linear evaluation of the disparity equations involving the three phases of the quaternion detail high-pass filters. A confidence measure singles out those regions where horizontal and vertical displacement can reliably be estimated simultaneously. The paper is useful for researchers and practitioners interested in the theory and applications of the quaternion wavelet transform. 相似文献
109.
TANJIEQING TANGSHUO 《高校应用数学学报(英文版)》1997,12(1):99-108
Triple branched continued fractions (TBCFs) are constructed by means of well-define Thiele-type partial inverted differences. The characterizatioon theorem, uniqueness theorem andsome projection identity properties are obtained for vector valued rational interpolants hy TBCFs. 相似文献
110.