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Noether-type theorem for discrete nonconservative dynamical systems with nonregular lattices
Springer Science and Business Media LLC - Tập 53 - Trang 545-554 - 2010
JingLi Fu, LiQun Chen, BenYong Chen
We investigate Noether symmetries and conservation laws of the discrete nonconserved systems with nonregular lattices. The operators of discrete transformation and discrete differentiation to the right and left are introduced for the systems. Based on the invariance of discrete Hamilton action on nonregular lattices of the systems with the nonconserved forces under the infinitesimal transformation...... hiện toàn bộ
Fast iterative approach to the difference scattering from a dielectric target above a rough surface
Springer Science and Business Media LLC - Tập 48 Số 6 - Trang 723-738 - 2005
Ye, Hongxia, Jin, Yaqiu
The difference field RCS (d-RCS) has been defined to analyze the scattering from the target above a rough surface. The electric field integral equations (EFIEs) of the difference induced currentJ sd on the rough surface, the induced electric currentJ o and magnetic currentK o on the dielectric target under a TE wave incidence are derived. A small portion of the rough surface towards the target alo...... hiện toàn bộ
The investigation of coherent structures in the wall region of a supersonic turbulent boundary layer based on DNS database
Springer Science and Business Media LLC - Tập 50 - Trang 348-356 - 2007
ZhangFeng Huang, Heng Zhou, JiSheng Luo
Through temporal mode direct numerical simulation, flow field database of a fully developed turbulent boundary layer on a flat plate with Mach number 4.5 and Reynolds number Re θ =1094 has been obtained. Commonly used detection methods in experiments are applied to detecting coherent structures in the flow field, and it is found that coher...... hiện toàn bộ
Energy levels of perturbed 6pnd J = 2 Rydberg states of Pb I by multichannel quantum defect theory
Springer Science and Business Media LLC - Tập 46 Số 5 - Trang 542 - 2003
Zhenwen Dai, Hongmei Jiang, Jingyao Liu, Wenwen Peng, Zhaoqiang Jiang
Study of transient luminescence of three kinds of Ru complexes bound to DNA
Springer Science and Business Media LLC - Tập 51 - Trang 133-139 - 2008
WeiLing Zhu, XueWen Liu, Hui Wang, HuiJuan Yu, AiZheng Li, Hui Chao, KangCheng Zheng, LiangNian Ji
The transient luminescence of three kinds of ruthenium complexes [Ru(bpy)2(7-CH3-dppz)]2+, [Ru(bpy)2(7-F-dppz)]2+ and [Ru(phen)2(7-F-dppz)]2+ bound to calf thymus DNA (ctDNA) has been studied by using the time-resolved spectroscopy. The results show that the luminescence is due to the radiative decay from the charge-transfer states to the ground state. By the interaction with DNA, the radiativeles...... hiện toàn bộ
Near infrared spectral and polarization imaging observation of coronal emission lines during the 2008 total solar eclipse
Springer Science and Business Media LLC - Tập 52 Số 11 - Trang 1794-1798 - 2009
Xu Bao, Zhiyong Zhang, Jiao-Yu Deng, Keliang Hu, Xuan Wang, YangBing Liu, Hongqi Zhang, Yuanyong Deng, Dongguang Wang, Xiaofan Wang
The change of magnetic inclination angles associated with the X3.4 flare on December 13, 2006
Springer Science and Business Media LLC - - 2009
YiXuan Li, Ju Jing, Chunyang Tan, Haimin Wang
Exact solutions for the flow of non-Newtonian fluid with fractional derivative in an annular pipe
Springer Science and Business Media LLC - Tập 48 - Trang 485-495 - 2005
Dengke Tong, Ruihe Wang, Heshan Yang
This paper deals with some unsteady unidirectional transient flows of Oldroyd-B fluid in an annular pipe. The fractional calculus approach in the constitutive relationship model Oldroyd-B fluid is introduced and a generalized Jeffreys model with the fractional calculus has been built. Exact solutions of some unsteady flows of Oldroyd-B fluid in an annular pipe are obtained by using Hankel transfor...... hiện toàn bộ
The principle of the positioning system based on communication satellites
Springer Science and Business Media LLC - Tập 52 - Trang 472-488 - 2009
GuoXiang Ai, HuLi Shi, HaiTao Wu, ZhiGang Li, Ji Guo
It is a long dream to realize the communication and navigation functionality in a satellite system in the world. This paper introduces how to establish the system, a positioning system based on communication satellites called Chinese Area Positioning System (CAPS). Instead of the typical navigation satellites, the communication satellites are configured firstly to transfer navigation signals from ...... hiện toàn bộ
The properties of halo structure for 17B
Springer Science and Business Media LLC - Tập 51 - Trang 781-787 - 2008
ZhengGuo Hu, Meng Wang, HuShan Xu, ZhiYu Sun, JianSong Wang, GuoQing Xiao, WenLong Zhan, ZhiGang Xiao, RuiShi Mao, Chen Li, XueYing Zhang, HongBin Zhang, TieCheng Zhao, ZhiGuo Xu, Yue Wang, RuoFu Chen, TianHeng Huang, Fen Fu, Qi Gao, JianLong Han, XueHeng Zhang, Chuan Zheng, YuHong Yu, ZhongYan Guo
The total reaction cross section (1724 ± 93 mb) of 17B at the energy of 43.7 A MeV on C target has been measured by using the transmission method at the Radioactive Ion Beam Line in Lanzhou (RIBLL). Assuming 17B consists of a core 15B plus two halo neutrons, the total cross section of 17B on C target was calculated with the zero-range Glauber model, where double Gaussian density distributions and ...... hiện toàn bộ
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