摘要：
The particular noise in MRI is not only lower the quality of image but also making de-noising more difficultly. The multiwavelet with the orthogonality and symmetry decomposes the image more precisely and denoise better than wavelet. After decomposing the image using multiwavelet, A method combining threshold-selecting function with semi-soft thresholding is proposed to reduce the noise in MRI. The simulation results shows that the method is superior to others.
作者机构：
[Wang, Ru-Min; Kim, C. S.] Yonsei Univ, Dept Phys, Seoul 120749, South Korea.;[Wang, Ru-Min; Kim, C. S.] Yonsei Univ, IPAP, Seoul 120749, South Korea.;[Yang, Ya-Dong] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.
通讯机构：
[Kim, C. S.] Y;Yonsei Univ, Dept Phys, Seoul 120749, South Korea.
摘要：
Motivated by the possible large direct CP asymmetry of B¯d0→D+D− decays measured by the Belle Collaboration, we investigate double charm Bu,d and Bs decays in the minimal supersymmetric standard model with R-parity violation. We derive the bounds on relevant R-parity violating couplings from the current experimental data, which show quite consistent measurements among relative collaborations. Using the constrained parameter spaces, we explore R-parity violating effects on other observables in these decays, which have not been measured or have not been well measured yet. We find that the R-parity violating effects on the mixing-induced CP asymmetries of B¯d0→D(*)+D(*)− and B¯s0→Ds(*)+Ds(*)− decays could be very large; nevertheless, the R-parity violating effects on the direct CP asymmetries could not be large enough to explain the large direct CP violation of B¯d0→D+D− from Belle. Our results could be used to probe R-parity violating effects and will correlate with searches for direct R-parity violating signals in future experiments.
作者机构：
[Li Chunfeng] Hosp Guangxi Univ, Nanning 530005, Guangxi, Peoples R China.;[Qin, Fengzhen] HuaZhong Normal Univ, Coll Phys Educ, Wuhan 430079, Peoples R China.
会议名称：
1st International Conference on Future Computer and Communication (FCC 2009)
会议时间：
JUN 06-07, 2009
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Li Chunfeng] Hosp Guangxi Univ, Nanning 530005, Guangxi, Peoples R China.^[Qin, Fengzhen] HuaZhong Normal Univ, Coll Phys Educ, Wuhan 430079, Peoples R China.
关键词：
Wushu;Knee injuries;Athletes
摘要：
Investigation of the knee injuries for Wushu and Sanda athletes, to explore the causes and provides relevant information that should assist in the prevention of the occurrence or lower the severity of the injury.
期刊：
Proceedings of SPIE - The International Society for Optical Engineering,2009年7494 ISSN：0277-786X
通讯作者：
Li, L.(lyli@phy.ccnu.edu.cn)
作者机构：
[Li, Lingyuan] Department of Electronic and Information Engineering, Central China Normal University, Wuhan , China;[Wang, Zhengqiang; Song, Lixin] College of Physics and Electronic Engineering, Xiangfan University, Xiangfan, HuBei, 441053, China
通讯机构：
Department of Electronic and Information Engineering, Central China Normal University, China
会议论文集名称：
MIPPR 2009: Multispectral Image Acquisition and Processing
关键词：
Balanced multiwavelet;Denoise;Image;Semi-soft thresholding function;Threshold-selecting model
摘要：
The particular noise in image not only lower the quality of image but also make denoising more difficult. The multiwavelet with the orthogonality and symmetry decompose the image signal more precisely and denoise better than wavelet. But for multiwavelet transform, the choice of prefilter is extremely important, meanwhile leads to the complication of computation. Furthermore, the image decomposition based on balanced orthogonal multiwavelet is excellent, and does not need pre-filtering. So, in this paper, we propose a method of combining threshold-selecting model with semi-soft thresholding function for image denoising based on the coefficients of balanced orthogonal multiwavelet transform. The simulation results show that this method is superior to others.
摘要：
In a cognitive radio network, cooperative spectrum sensing is conducted among the secondary users so as to improve the sensing performance. However, it's not necessary to cooperate all users to perform spectrum sensing while achieve a given error bound. In this paper, we investigate the problem of optimal number of secondary users in cooperative spectrum sensing. Moreover, an efficient and robust cooperative spectrum sensing algorithm is presented. A few secondary users are selected to cooperative based on reputation, while guarantee an error bound. Simulation results show the improvement of the sensing performance and network security as opposed to the random choosing.
作者机构：
[Guo Long] Huazhong Normal Univ, Complex Sci Ctr, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Guo Long] H;Huazhong Normal Univ, Complex Sci Ctr, Wuhan 430079, Peoples R China.
关键词：
No English Keyword
摘要：
It is shown that many real complex networks share distinctive features,such as the small-world effect and the heterogeneous property of connectivity of vertices,which are different from random networks and regular lattices.Although these features capture the important characteristics of complex networks,their applicability depends on the style of networks.To unravel the universal characteristics many complex networks have in common,we study the fractal dimensions of complex networks using the method introduced by Shanker.We lind that the average 'density' (p(r)) of complex networks follows a better power-law function as a function of distance r with the exponent df,which is defined as the fractal dimension,in some real complex networks.Furthermore,we study the relation between df and the shortcuts Nadd in small-world networks and the size N in regular lattices.Our present work provides a new perspective to understand the dependence of the fractal dimension df on the complex network structure.
作者机构：
[Jiayun Chen; Feng Liu] Institute of Particle Physics,CCNU,Wuhan,430079,P.R.China;[Jiaxu Zuo] Institute of High Energy Physics,CAS,Beijing 100049,P.R.China;[Aihong Tang] Physics Department,Brookhaven National Lab.,Upton,NY 11973,USA;[Yugang Ma; Xiangzhou Cai] Shanghai Institute of Applied PhysicsCAS,Shanghai 201800,P.R.China
会议名称：
The 10th International Conference on Nucleus-Nucleus Collisions(第十届国际核—核碰撞会议
会议时间：
2009-8-16
会议地点：
北京
会议主办单位：
中国物理学会;中国核学会
会议论文集名称：
The 10th International Conference on Nucleus-Nucleus Collisions(第十届国际核—核碰撞会议论文集
作者机构：
[崔增丽; 郭继花; 杨磊; 黄致新; 朱宏生; 邵剑波] College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China;[章平] Department of Physics, Yunyang Teachers College, Danjiangkou 442700, China
通讯机构：
[Guo, J.-H.] C;College of Physical Science and Technology, Central China Normal University, China
作者：
Abelev, B. I.*;Aggarwal, M. M.;Ahammed, Z.;Anderson, B. D.;Arkhipkin, D.;...
期刊：
PHYSICAL REVIEW C,2009年80(4) ISSN：2469-9985
通讯作者：
Abelev, B. I.
作者机构：
[Iordanova, A.; Abelev, B. I.; Barannikova, O.; Hollis, R. S.; Garcia-Solis, E. J.; Hofman, D. J.; Betts, R. R.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.;[Underwood, D. G.; Krueger, K.; Spinka, H. M.] Argonne Natl Lab, Argonne, IL 60439 USA.;[Bombara, M.; Jones, P. G.; Elhalhuli, E.; Gaillard, L.; Burton, T. P.; Nelson, J. M.; Barnby, L. S.] Univ Birmingham, Birmingham, W Midlands, England.;[Ullrich, T.; Pile, P.; Lamont, M. A. C.; LeVine, M. J.; Ljubicic, T.; Hallman, T. J.; Xu, Z.; Ogawa, A.; Ruan, L.; Tang, A. H.; Videbaek, F.; Fine, V.; Fisyak, Y.; Beavis, D. R.; Lauret, J.; Bland, L. C.; Okada, H.; Longacre, R. S.; Sorensen, P.; Christie, W.; Lebedev, A.; Dunlop, J. C.; Perevoztchikov, V.; Gordon, A.; Landgraf, J. M.; DePhillips, M.; Love, W. A.; Yip, K.; Didenko, L.; Guryn, W.; Ludlam, T.; Van Buren, G.; Fachini, P.; Lee, J. H.] Brookhaven Natl Lab, Upton, NY 11973 USA.;[Perkins, C.; Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.; Trattner, A. L.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
通讯机构：
[Abelev, B. I.] U;Univ Illinois, Chicago, IL 60607 USA.
摘要：
The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of J/psi e(+) e(-) at midrapidity and high transverse momentum (pT > 5 GeV/c) in p + p and central Cu + Cu collisions at root s(NN) = 200 GeV. The inclusive J/psi production cross section for Cu + Cu collisions is found to be consistent at high p(T) with the binary collision-scaled cross section for p + p collisions. At a confidence level of 97%, this is in contrast to a suppression of J/psi production observed at lower p(T). Azimuthal correlations of J/psi with charged hadrons in p + p collisions provide an estimate of the contribution of B-hadron decays to J/psi production of 13% +/- 5%.
期刊：
EUROPEAN PHYSICAL JOURNAL D,2009年51(2):267-273 ISSN：1434-6060
通讯作者：
Xu, Q.
作者机构：
[Xu, Q.; Yin, J. W.] Huanggang Normal Univ, Coll Phys Sci & Technol, Huanggang 438000, Hubei, Peoples R China.;[Hu, X. M.] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Xu, Q.] H;Huanggang Normal Univ, Coll Phys Sci & Technol, Huanggang 438000, Hubei, Peoples R China.
关键词：
42.50.Gy Effects of atomic coherence on propagation;absorption;and amplification of light;electromagnetically induced transparency and absorption;42.50.Hz Strong-field excitation of optical transitions in quantum systems;multiphoton processes;dynamic Stark shift
