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Quantum Chemical Studies on the Mechanism of Producing Oxygenates in Fischer-Tropsch Synthesis on M/SiO2.M = Ni,Ru,Rh,Pd)

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Chemical Research in Chinese Universities 1995年第2期11卷 122-130页

作者： ZHU Tian-wei and HAO Zheng-ping (department of Chemistry,Inner Mongolia normal University,Huhehote,01002.) Lanzhou Institute of Chemical {2. INNER MONGOLIA normal UNIV DEPT CHEMHOHHOT 010022PEOPLES R CHINA

EHMO calculations and orbital analyses of fragment;;have been performed for the formation of oxygenates in Fischer-Tropsch synthesis on the butterfly model for four different metal (Ni,Ru,Rh,Pd) catalysts supported on *** were made for the four processes,i.e.,CO-dissociation;Coupling of CO and H to produce CHO;Insertion of CO to M-CH3.insertion of CH2.to M-CH3.On the basis of comparing the degree of CO bonds activation and the energy barriers of the foregoing processes for these four catalysts,it is concluded that Ni/SiO2.can be used as the methanation *** Ru/SiO2.and Rh/SiO2.C2.oxygenated compound can be produced (acetaldehyde),especially Rh/SiO2.is the even better catalyst,and Pd/SiO2.is a methanol synthesis catalyst.

关键词： EHMO calculation Fischer-Tropsch synthesis Mechanism of producing oxygenates Group VIII supported metal catalysts

Dense coding scheme using superpositions of Bell-states and its NMR implementation

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Science China(physics,Mechanics & Astronomy) 2005年第1期48卷 57-67页

作者： ZHANG Jingfu, XIE Jingyi, DENG Zhiwei & LU Zhiheng Key Laboratory for Quantum Information and Measurements, department of physics, Tsinghua University, Beijing 100084, China Center for Quantum Information, Tsinghua University, Beijing 100084, China department of Materials Science and Engineering, Beijing {3. University, Beijing 100875, China Testing and Analytical Center, Beijing {3. University, Beijing 100875, China department of physics, Beijing {3. University, Beijing 100875, China 1. Key Laboratory for Quantum Information and Measurements Department of Physics Tsinghua University 100084 Beijing China 2. Center for Quantum Information Tsinghua University 100084 Beijing China 3. department of Materials Science and Engineering Beijing Normal University 100875 Beijing China 4. Testing and Analytical Center Beijing Normal University 100875 Beijing China 5. department of physics Beijing Normal University 100875 Beijing China

Dense coding using superpositions of Bell-states is proposed. The generalized Grover's algorithm is used to prepare the initial entangled states, and the reverse process of the quantum algorithm is used to determine the entangled state in the decoding measurement. Compared with the previous schemes, the superpositions of two Bell-states are exploited. Our scheme is demonstrated using a nuclear magnetic resonance (NMR)quantum computer. The corresponding manipulations are obtained. Experimental results show a good agreement between theory and experiment. We also generalize the scheme to transmit eight messages by introducing an additional two-state system.

关键词： dense coding, superpositions of Bell-states, generalized Grover's algorithm, nuclear magnetic res-onance, quantum computer.

Bell States and Two-Qubit Logic Gate with Superconducting Charge Qubits Coupling to a Nanomechanical Resonator

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Communications in Theoretical physics 2007年第12期48卷 999-1002页

作者： LIAO Jie-Qiao~1 and WANG Xin-Wen~(2.3.~1 department of physics,Hunan {2. University,Changsha 410081,China~2.department of physics,Beijing {2. University,Beijing 100875,China~3.department of Electronic Engineering and physics,Hunan University of Science and Engineering,Yongzhou 42.100,China department of physics Hunan Normal University department of physics Beijing Normal University department of Electronic Engineering and physics Hunan University of Science and Engineering

We propose a scheme for generating Bell states involving two SQUID-based charge qubits by coupling themto a nanomechanical *** also show that it is possible to implement a two-qubit logic gate between the twocharge qu... 详细信息

关键词： Bell states superconducting charge qubit two-qubit logic gate nanomechanical resonator

New Multiple Soliton Solutions of High-Dimensional Nonlinear Klein-Gordon Equation

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应用数学 1992年第4期 113-114页

作者： Lou Senyue Zhu Yaojing (physics department, Ningbo {2. College, Ningbo, 3.52.1)

The generalized nonlinear K-G equation can be written as The well known sine-Gordon(F(φ)=sinφ),φ~4(F(φ)=1/2.φ~3.φ))are just the special *** the method proposed by Gibbon ***(***.A65(1978)3.0),we introduce the b... 详细信息

关键词： exp

Ultrasonic investigations on elastic properties of (Bi,Pb)-Sr-Ca-Cu oxide ceramic superconductors

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Chinese Journal of Acoustics 1990年第3期9卷 231-240页

作者： HE Yusheng XIANG Jiong WANG Xin(department of physics, Tsinghua University)ZHANG Jincang CHANG Fanggao(department of physics, Henan normal University)HE Aisheng(physics Division, North University of Technology)

Ultrasonic velocities have been measured in single phase Bi_1.7 Pb_0.3.r2.aCu2.8+x and Bi1.7Pb0.3.r2.a2.10+x polycrystalline samples. Anomalous changes of both longitudinal and transverse velocities were observed near 2.0K, which indicates that some structural phase transitio might occur. The elastic constants of these samples have been determined from the measured ultrasonic velocity data, which are much smaller than those of YBa2.Cu3.O7-y and BaTiO3. manifesting that the interlayer coupling will dramatically decrease when the c - axes of the unit cells of these perovstite-like multilayer ceramics increase. The values of Poisson ratio, however, of those ceramics are very close, implying similar interatomic bonding forces. Corrected to void-free state, the Debye temperature of these materials is estirnated as 2.0 ±2.k. The temperature dependence of Debye temperatures for these materials is also calculated by using the same method and reported for the first time.

关键词： Ultrasonic investigations on elastic properties of Sr-Ca-Cu oxide ceramic superconductors Bi,Pb Cu Pb Ca

基于FPGA技术的通信原理课程实验教学研究

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陕西师范大学学报（自然科学版） 2007年第S2期35卷 201-203页

作者：姚展王明伟咸阳师范学院物理学系陕西科技大学电气与电子工程学院陕西咸阳712000

根据目前通信原理课程实验教学的现状,提出并利用FPGA及QuartusII软件设计通信原理课程实验系统,给出了实施方案.该系统结合了传统实验方法和计算机仿真技术的优点,在教学中效果明显提高.

关键词： FPGA QuartusII 通信原理实验

Challenges in the theoretical investigations of lipid membrane configurations

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Chinese physics B 2013年第2期22卷 36-44页

作者：涂展春 department of physics Beijing Normal University Kavli Institute for Theoretical physics China Chinese Academy of Sciences

We report some key results in the theoretical investigations of configurations of lipid membranes and present several challenges in this field,which involve（i）the exact solutions to the shape equation of lipid vesicles,（ii）the exact solutions to the governing equations of open lipid membranes,（iii）the neck condition of two-phase vesicles in the budding state,（iv） the nonlocal theory of membrane elasticity,and（v）the relationship between the symmetry and the magnitude of the free energy.

关键词： configuration lipid membrane

The microwave absorption of ceramic-cup microwave ion source

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Nuclear Science and Techniques 2000年第3期11卷 155-161页

作者： LIU Lin-Mao, JING Shi-Wei, LI Wen-Sheng, GU Li (physics department, foe Northeast {2. University, Changchun 13.02.) 东北师范大学吉林长春 130024

An experiment system of ceramic-cup microwave ion source has been built here. Its microwave absorption efficiency as a function of the magnetic field and the pressure is presented. When the microwave incident power is 3.0-500W the microwave absorption efficiencies are more than 90% if the system is optimized and the magnetic field at the microwave window is 0.095T.

关键词：微波离子源中子管陶瓷材料微波吸收效率电子回旋加速器

Process e~-γ→e~-H in Littlest Higgs Model

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Communications in Theoretical physics 2006年第11期46卷 891-894页

作者： YUE Chong-Xing,~+ ZHANG Feng, YANG Shuo, and SUN Yah-Bin department of physics, Liaoning {2. University, Dalian 11602., China department of physics Liaoning Normal University Dalian 116029 China

In the context of the littlest Higgs (LH) model, we estimatc the production cross section of the process e~-γ→e~-H in the future high-energy linear e~+e~- collider (IL C) with the center-of-mass (CM) energy S=500 *** numerical results show that the contributions of the LH model to this process are very small in most of the parameter space allowed by the electroweak precision measurement data, and are very difficult to be detected in the future ILC experiments.

关键词： littlest Higgs model Higgs boson high-energy linear e~+e~- collider