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强流加速器中束晕-混沌的小波间隔反馈控制

物理学报 2001年第8期50卷 1440-1446页

作者：高远翁甲强方锦清罗晓曙广西师范大学物理与电子科学系桂林541004 中国原子能科学研究院北京102413

在束晕混沌的小波函数控制已实现的基础上 ,给出了一种形式更为简单的小波函数控制器 ,并研究了束晕混沌的多周期间隔反馈控制方法 .以控制初始条件遵从Kapchinshij Vladimirskij分布的离子束为例进行模拟 ,结果表明 ,通过适当选择... 详细信息

在束晕混沌的小波函数控制已实现的基础上 ,给出了一种形式更为简单的小波函数控制器 ,并研究了束晕混沌的多周期间隔反馈控制方法 .以控制初始条件遵从Kapchinshij Vladimirskij分布的离子束为例进行模拟 ,结果表明 ,通过适当选择间隔的周期数和小波控制器的控制参数 ,仍能很有效地对束晕混沌进行控制 ,并能达到消除束晕及其再生现象的理想结果 .

关键词：小波函数控制器多周期间隔束晕-混沌强流离子束强流加速器

STUDIES ON THE BHQ ICE CORE FROM THE LAW DOME, ANTARCTICA

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极地研究 1990年第1期 20-26页

作者： Huang Maohuan Li Jun Xie Zichu(Lanzhou institute of Glaciology and Geocryology, Academia Sinica, Lanzhou 730000)Zhang Yunhui(institute of{2. energy,{4., China)

The structure of the ice core varies with depth, Its surface layer is firn, followed by an ice layer with random fabric pattern (beginning at 2.m depth), then transformed to a small circle girdle pattern (beginning at 14. m depth) through a transition layer, finally to a single-maximum pattern (beginning at 191 m depth). The stratigraphic profile of the ice core is similar to those of other cores on the Law Dome, For BHQ located in the middle of a flow line from the summit to the coast, the initial depth of every specific layer is less than that in the upstream and larger than that in the downstream. The ice was analyzed for trace elememts using instrumental neutron activation technique. No tendency towards a systematic increase or decrease in the element concentrations in the past 4.00 years has been found. The mean concentrations of Na and Al over the past 4.00 years are higher than those in the Vostok ice core by factors of 9 and 4. respectively.

关键词： BHQ ice core ice structure trace elements Law Dome Antarctica.

Measurement of Neutron Capture Cross Section for ^(180)Hf

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Chinese journal of nuclear physics 1997年第2期19卷 110-114页

作者： Chen Jinxiang Shi Zhaomin Tang Guoyou Zhang Guohui institute of Heavy Ion Physics,Peking University,beijing 100871Lu Hanlin Han Xiaogang Huang Xiaolong China institute of atomic {4.,P.O.Box 2.5(3),beijing 102.13 北京大学重离子物理所北京中国原子能科学院北京

The neutron capture cross section for 180Hf relative to the 197Au（n,γ）198Au reaction ismeasured at neutron energies of 0.52.1.10 and 1.60 MeV using the activation *** of the products are measured with a high resolution HPGe detector gamma ray *** errors of the measured results are 5%～6%.Our results have a good agreementwith those of other authors within *** sections for the reaction are calculated withUNF code and recommended data are also given.

关键词： 100Hf 198Au Neutron capture cross section Activition method

The Progress of Researches on ADS in China

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工程科学（英文版） 2007年第4期5卷 51-58页

作者： Zhao Zhixiang,Xia Haihong(China institute of atomic{2.,beijing {4.,China)

The conceptual study of the accelerator driven system(ADS)that lasted for about five years ended in 1999 in *** one project of the National Basic Research Program of China(973 Program)in the energy domain,which is sponsored by the China Ministry of Science and Technology(MOST),a five-year-program of fundamental research of ADS physics and related technology was launched in 2.00 and passed national review at the end of *** China institute of{2. energy(CIAE),the institute of High energy Physics(IHEP),the institute of Heavy Ion Physics in Peking University(PKU-IHIP)and other institutions jointly carried out the *** research activities were focused on HPPA physics and technology,reactor physics of external source driven sub-critical assembly,nuclear data base and material *** HPPA,a high current injector consisting of an ECR ion source,LEBT and an RFQ accelerating structure of 3.5 MeV was *** reactor physics study,a series of neutron multiplication experimental study has been carried out and still being *** VENUS facility has been constructed as the basic experimental platform for neutronics study in ADS ***'s a zero power sub-critical neutron multiplying assembly driven by external neutron produced by a pulsed neutron *** theoretical,experimental and simulation study on nuclear data,material properties and nuclear fuel circulation related to ADS is carrying on to provide the database for ADS system *** main results on ADS related researches will be reported.

关键词： nuclear power ADS transmutation

Beam Propagation Factor and Generation of Cosh-squared-Gaussian Beams

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Chinese Journal of Lasers 2001年第6期10卷 47-50页

作者： ZHU Kaicheng 1,2.3 TANG Huiqin 2.4.ZHU Zhenhe 1 ( 1institute for Applied {2. and Molecular Physics, Sichuan University, Chengdu 610065, China 2.epartment of Applied Physics and Heat Engineering, Central South University, Cha 四川大学原子分子应用所四川成都 610065 中南大学应用物理与热能工程系湖南长沙 410083

A new light beam termed as a cosh-squared-Gaussian beam (ChSGB) which may be one of solutions of the paraxial wave equation for propagation in complex optical systems has been introduced. Their beam propagation factor... 详细信息

关键词： Hermite-sinusoidal-Gaussian beam beam propagation factor flattened beam

Electronic structure and magnetism of R（Fe,Si）12.（R=Y,Nd）

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Science China(Physics,Mechanics & Astronomy) 2006年第2期Mechanics & Astronomy) .卷 195-202页

作者： SUN Guang’ai1, CHEN Bo1, DU Honglin2. FAN Zhijian1, GAO Tao3 & QI Xinhua31. institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 62.900, China 2. Department of physics, Peking university, beijing 100871, China 3. institute of atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

The newly developed full-potential linearized augmented plane wave (LAPW) and local orbitals (lo) based on standard APW methods are briefly introduced, and the structure and magnetic properties of R(Fe, Si)12.compounds (R = Y, Nd) are calculated using the method. The distribution of Si at different sites is analyzed based on total energy of one crystal unit with structure having been optimized. The characters of magnetic mo-ments, total density of states (TDOS) and partial density of states (PDOS) for different crystal sites Si occupies are obtained and analyzed. The results show that the total mag-netic moments of RFe10Si2.(R = Y, Nd) are larger than those of RFe10M2.(M = Ti, V, Cr, Mn, Mo and W) and the hybridization mechanism is seen as follows. Si(8j) reduce the mag-netic moments of Fe at three sites, however, Si(8f) mainly reduce the magnetic moments of Fe(8i) and Fe(8j) atoms. The Curie temperature is markedly enhanced by the introduc-tion of Si atoms according to spin fluctuation of DOS at Fermi level.

关键词： (L)APW+lo method R(Fe Si)12.R = Y Nd) magnetic moment Density of state.

THE EVALUATION OF~2.(n,2.)~1H REACTION CROSS SECTION

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中国核科技报告 1990年第S3期 44-48页

作者： CaiDunjiu Zhuang youxiang WangZisheng YuBaosheng (CNDC, institute OF atomic{2., beijing)

This evaluation is based on Huang’s *** the ex-perimental data of ~2.(n,2.)reaction until 1990 were collected,analysed and *** recommended values are compared withthe ENDF/B-6.

关键词： ENDF THE EVALUATION OF~2. n,2. REACTION CROSS SECTION

NEUMANN SERIES SOLUTION TO A NEUTRON TRANSPORT EQUATION OF SLAB GEOMETRY

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Systems Science and Mathematical Sciences 1993年第1期6卷 13-17页

作者： WANG Zaihua YANG Mingzhu QIN Guoqiang institute of atomic{2.,beijing {4.,China College of Engineer Corps, Nanjing 2.0007, China 北京原子能所北京南京陆军工程学院江苏南京

This paper deals with the solution to an energy, dependent stationary neutrontransport equation of slab geometry. In L^p space, the equation is converted into an equiva-lent integral equation. By the study of the corresponding integral operator and its spectralradius, results of Neumann series solution are obtained, and an easy-verified condition thatthe transport equation has a nonnegative solution is given.

关键词： Neutron transport equation series solution spectral radius

Synchronizing spatiotemporal chaos in the coupled map lattices using nonlinear feedback functions

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Nuclear Science and Techniques 1997年第3期 1-7页

作者： Fang Jin Qing ( China institute of atomic{2., beijing 102.13) M K Ali △ ( Department of Physics, The University of Lethbridge,Lethbridge, Alberta T1K 3M4. Canada)

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ＳｙｎｃｈｒｏｎｉｚｉｎｇｓｐａｔｉｏｔｅｍｐｏｒａｌｃｈａｏｓｉｎｔｈｅｃｏｕｐｌｅｄｍａｐｌａｔｉｃｅｓｕｓｉｎｇｎｏｎｌｉｎｅａｒｆｅｄｂａｃｋｆｕｎｃｔｉｏｎｓＴｈｅｗｏｒｋｉｓｓｕｐｐｏｒｔｅｄｂｙｆｕｎｄｉｎｇｔｏＦａｎｇＪｉｎＱｉ...

关键词： Nonlinear feedback functions Synchronization Spatiotemporal chaos Coupled map lattices Noise effect