检索结果-南通市图书馆

Complete multiple round quantum dense coding with quantum logical network

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第9期52卷 1162-1165页

作者： LI ChunYan1,2.LI XiHan1,2.DENG FuGuo1,2.3,ZHOU Ping1,2.& ZHOU HongYu1,2.3 1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,beijing normal {2.,beijing 100875,china 2.Institute of Low Energy Nuclear physics,and department of Material Science and Engineering,beijing normal {2.,beijing 100875,china 3 beijing Radiation Center,beijing 100875,china Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing China Institute of Low Energy Nuclear physics and Department of Material Science and Engineering Beijing Normal University Beijing China beijing Radiation Center Beijing China

We present a complete multiple round quantum dense coding scheme for improving the source ca-pacity of that introduced recently by Zhang et al. The receiver resorts to two qubits for storing the four local unitary ope... 详细信息

关键词：量子通信多重量子紧凑编码量子逻辑网络量子纠缠

A Remark on Multilinear Oscillatory Singular Integrals

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2000年第4期16卷 655-668页

作者： Shanzhen Lu Dunyan Yan department of Mathematics, beijing normal university,{2.. P. R. china department of Mathematics Beijing Normal University Beijing 100875 P. R. China

In this paper we study multilinear oscillatory singular integrals with rough kernel and give a criterion of certain boundedness for this kind of operator

关键词： Multilinear oscillatory integrals Calderon-Zygmund kernel BLO space

Exotic structure of the third excited state in^(2.)Na

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2005年第23期50卷 2677-2680页

作者： LI Xihan1,2.3, LIANG Yujie1,2.3, DENG Fuguo1,2.3, LIU Zuhua1,4 & ZHOU Hongyu1,2.3 1. Key Laboratory of Beam Technology and Material Modification of Minister of Education, beijing normal university, beijing 100875,{2. 2. Institute of Low Energy Nuclear physics, and department of Material Science and Engineering, beijing normal university, beijing 100875,{2. 3. beijing Radiation Center, beijing 100875,{2. 4.{2. Institute of Atomic Energy, beijing 102.13,{2. Key Laboratory of Beam Technology and Material Modification of Minister of Education Beijing Normal University Beijing 100875 China Institute of Low Energy Nuclear physics Department of Material Science and Engineering Beijing Normal University Beijing 100875 China beijing Radiation Center Beijing 100875 China china Institute of Atomic Energy Beijing 102413 China

The probability of the last proton being out of the binding potential, P and the root-mean-square (rms) ra- dius (1/2. of the third excited state in 2.Na are calcu- lated by means of asymptotic normalization coefficie... 详细信息

The probability of the last proton being out of the binding potential, P and the root-mean-square (rms) ra- dius (2.1/2. of the third excited state in 2.Na are calcu- lated by means of asymptotic normalization coefficient (ANC) method with the experimental date existing. The results are P=54.73% and 2.1/2.5.2. fm respectively. The P value and the contribution of the asymptotic part to the 2.1/2.are compared with those of several other low energy states in 2.Na. It is found that the valence particle in the third excited state has an obvious larger P than those of other states. The density distribution of the valence proton in this state is also compared with the nucleons in the nuclear core 2.Ne, and a far extended tail can be seen clearly. These results show that the third ex- cited state in 2.Na is a proton halo state.

关键词：钠第三激发态外部结构有效半径密度分布渐近标准化系数

Conformational Analysis of γ-Butyrolactones by Nuclear Magnetic Resonance Spectroscopy

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1997年第10期8卷 885-888页

作者： Fu An KANG and Cheng Lie YIN (department of Chemistry beijing normal university ,{2.) department of Chemistry Beijing Normal University Beijing 100875 China

A series of trans-4, 5-disubstituted -γ-butyrolactones are found to assume two different envelope conformations by means of nuclear magnetic resonance spectroscopy.

关键词： Conformational Analysis of Butyrolactones by Nuclear Magnetic Resonance Spectroscopy

On the weak convergence of super-Brownian motion with immigration

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2009年第9期52卷 1875-1886页

作者： ZHANG Mei School of Mathematical Sciences, beijing normal university, beijing 100875,{2. School of Mathematical Sciences Beijing Normal University Beijing China

We prove fluctuation limit theorems for the occupation times of super-Brownian motion with immigration. The weak convergence of the processes is established, which improves the results in references. The limiting proc... 详细信息

关键词： super-Brownian motion with immigration occupation time process central limit theorem tightness 60J80 60F05

The studies on neurogenesis induced by brain injury inadult ring dove

在线全文

学校读者我要写书评

暂无评论

Cell Research 1998年第2期8卷 151-158页

作者： ZUO MING XUE(Biology department, beijing normal university, {2.100875, china) Biology department Beijing Normal University Beijing China

It was the first time demonstrated by us that the number of newborn neurons was increajsed after making lesion in forebraill of adult ring dove (Streptopelia risoria)by means of autoradiography and *** in the adult avian is restricted to the telencephalon. In doves with bilateral electrolytic lesion of nucleus ectostriatum (E), the mean number of proliferating cells in the lateral ventricular zone (LVZ) and newborn neurons in the forebrain increased by 1.95 times and 2.38times respectively as compared with that in intact doves. The most relllarkable increase of neurogenesis induced by nucleus ectostriatum lesions was found at the anteriorposterior level 3 (L3), where the lesion site was *** results showed that the electrolytic brain lesion altered the distribution pattern of proliferating cells in theLVZ and resulted in increase of the number of newborn neurons in the non-VZ areas of forebrain. The changes in number and distribution pattern of proliferating cells in LVZ and newborn neurons in forebrain may be dependent on site of lesion. Studies on the relationship between proliferating cells in LVZ and newly generated neurons in non-VZ areas may help to understand the mechanism of brain plasticity and development.

关键词： Autoradiography neurogenesis brain lesion ring dove

Environmental　risk　assessment　of　the　middle　route　of　south－to－north　water　transferring　source　project　in　china

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 1996年第3期8卷 285-291页

作者： Wang Huadong Wang Fei(Institute of Environmental Sciences,beijing normal {2., beijing 100875, china) Institute of Environmental Sciences Beijing Normal University Beijing 100875 China

This paper focused on the environment risk of the middle route of south-to-north water transferring source project in china. Analytic hierarchy process was applied to risk identification,fuzzy probability-fault tree analysis to risk probability assessment,statistics and analogy process to risk consequences assessment, lastly, grey relevant analysis and comprehensive index process to risk impact evaluation. The main environment risk accident of the project is dam failure, the main causative factors of the accident are catastrophic flood and wrecking earthquake. The flash flood, due to dam failure, will impact on nature, society and economy. The major environment risk areas are Jingzhou and Xiangfan,Hubei Province. The environment risk management measures should be adopted in order to ensure the safety of the project-environment complex system.

关键词： water source project environment risk risk assessment

Entropy number and non-linear approximations on multivariate Besov space by manifolds of finite pseudo-dimension

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2006年第3期16卷 260-265页

作者： LONG Jingfan and FANG Gensun (School of Mathematical Sciences, beijing normal university, beijing 100875,{2. department of Computer Science, Information Technology Institute, beijing 100101,{2.) School of Mathematical Sciences Beijing Normal University Beijing 100875 China department of Computer Science Information Technology Institute Beijing 100101 China

We determine the asymptotic order of entropy number and optimal non -linear approximations of anisotropic periodic Besov class of Bpθr(Td') (1≤p≤∞,1≤0≤∞) by manifolds of finite pseudo-dimension in the metric Lq... 详细信息

关键词： Pseudo-dimension anisotropic Besov class of functions entropy number nonlinear width.

ALMOST　PERIODIC　SOLUTIONS　OF　NEUTRAL　FUNCTIONAL　DIFFERENTIAL　EQUATIONS　WITH　NONAUTONOMOUS　OPERATOR

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1995年第4期16卷 519-530页

作者： YUAN RONG(department of Mathematics, beijing normal universityl{2., china.) beijing normal UNIV DEPT MATHBEIJING 100875PEOPLES R CHINA

This paper presents some existence theorems on almost periodic solutions for almost periodicneutral functional differential equation and its perturbed systems by means of Liapunov functional, and extends the correspon... 详细信息

关键词： Almost periodic solution Neutral functional differelltial equation Nonautollomous operator