自散焦介质对非线性热像的抑制效应
作者:
王友文;文双春;胡勇华;章礼富;杨华;...
期刊:
湖南大学学报(自然科学版) ,2009年36(9):87-92 ISSN:1674-2974
通讯作者:
Wen, S.-C.(cwen@vip.sina.com)
作者机构:
[傅喜泉; 胡勇华; 王友文; 文双春; 杨华; 章礼富] College of Computer and Communication, Hunan Univ, Changsha, Hunan 410082, China;[王友文] Department of Physics and Electronic Information Science, Hengyang Normal Univ, Hengyang, Hunan 421008, China
通讯机构:
College of Computer and Communication, Hunan Univ, China
关键词:
高功率激光;热像;小尺度自聚焦;自散焦介质
摘要:
理论分析了运用自散焦介质抑制热像的可行性,进而通过数值模拟方法,研究了自散焦介质对强激光通过自聚焦介质非线性热像的抑制效应.结果表明,自散焦介质放置在自聚焦介质的前面或后面均能有效地抑制热像形成,但较厚自散焦介质后置情况的热像抑制效果好于前置情况,且自散焦介质与自聚焦介质越薄,二者之间的间隙越小,抑制效果越好.
语种:
中文
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浅谈大学生思想政治教育沟通
作者:
刘灵婷
期刊:
科教文汇(下旬刊) ,2009年(22):84 ISSN:1672-7894
作者机构:
衡阳师范学院物理与电子信息科学系,湖南·衡阳,421008
关键词:
大学生;沟通;思想政治教育
摘要:
思想政治教育中的沟通,是指在思想政治教育过程中,教育者与受教育者之间以语言符号为媒介所进行的思想信息和情感的双向交流与互动.沟通的直接目的是形成对思想政治教育内容的理解和共识.
语种:
中文
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智能化网络虚拟实验室的构建
作者:
周熠
期刊:
科技资讯 ,2009年(9):8-9 ISSN:1672-3791
作者机构:
衡阳师范学院物理与电子信息科学系,湖南衡阳,421008;[周熠] 衡阳师范学院
关键词:
虚拟仪器;虚拟实验室;实验教学
摘要:
主要介绍了将虚拟仪器技术应用于实验室教学的背景,分析了实现虚拟电子实验室所需的关键技术,并对实验室的软件、硬件构成及建立虚拟实验室的实施方案进行了介绍。
语种:
中文
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Realization of Toffoli gate operation using four-level atoms in cavity QED system
作者:
Tang Shi-Qing* ;Zhang Deng-Yu;Xie Li-Jun;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理B ,2009年18(1):56-61 ISSN:1674-1056
通讯作者:
Tang Shi-Qing
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Tang Shi-Qing] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
Toffoli gate;four-level atom;cavity QED;fidelity
摘要:
This paper proposes a scheme for realization of a three-qubit Toffoli gate operation using three four-level atoms by a selective atom-field interaction in a cavity quantum electrodynamics system. In the proposed protocol, the quantum information is encoded on the stable ground states of atoms, and atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influence of the dissipation on fidelity and success probability of the three-qubit Toffoli gate is also discussed. The scheme can also be applied to realize an N-qubit Toffoli gate and the interaction time required does not rise with increasing the number of qubits. © 2009 Chin. Phys. Soc. and IOP Publishing Ltd.
语种:
英文
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Thermal entanglement and teleportation in a three-qubit Heisenberg XXZ model with Dzyaloshinski-Moriya anisotropic antisymmetric interaction
作者:
Xie Li-Jun* ;Zhang Deng-Yu;Tang Shi-Qing;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理B ,2009年18(8):3203-3207 ISSN:1674-1056
通讯作者:
Xie Li-Jun
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Henyang Normal Univ, Dept Phys & Elect Informat Sci, Henyang 421008, Peoples R China.
通讯机构:
[Xie Li-Jun] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
quantum teleportation;concurrence;fidelity;Bell inequality violation
摘要:
This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaloshinski-Moriya (DM) anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel. The entanglement dependences on the DM interaction and temperature are given in detail. It obtains the relation between the concurrence and average fidelity, and shows that the same concurrence can lead different average fidelities. Moreover, it finds the thermally entangled states which do not violate the Bell inequalities, and can still be used for quantum teleportation. © 2009 Chin. Phys. Soc. and IOP Publishing Ltd.
语种:
英文
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深入研究基础教育现状在改革中加强物理学专业建设
作者:
高峰;游开明;张登玉
期刊:
衡阳师范学院学报 ,2009年30(03):149-152 ISSN:1673-0313
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[高峰; 游开明; 张登玉] 衡阳师范学院
关键词:
物理学;教师教育;课程体系改革
摘要:
我国现行的物理教师教育课程存在着基础课程相对薄弱、教育类课程比例偏低、实践课程明显不足、学科课程有待精化等问题.为了调整和优化我国物理教师教育课程,着力汲取并借鉴国内外认知科学、教育科学和教育技术研究的新思想、新方法与新成果,本文根据我国的具体情况,分析了物理教师教育存在的主要问题,提出了物理教师教育课程体系改革的初步设想.
语种:
中文
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基于单片机的累积法测量氡析出率数据处理方法
作者:
谭延亮;肖田;周毅;于旭晖
期刊:
衡阳师范学院学报 ,2009年30(06):40-42 ISSN:1673-0313
作者机构:
[谭延亮] 衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;[谭延亮] 南华大学核科学技术学院,湖南,衡阳,421001;[周毅; 于旭晖; 肖田] 衡阳师范学院
关键词:
累积法;氡析出率;线性拟合
摘要:
累积法测量氡析出率需要对多次等时间间隔测量的氡浓度数据进行线性拟合,最后求得氡析出率.实际中一般使用单片机作为氡析出率测量仪的主控芯片,单片机只能进行一般的代数运算,无法通过矩阵运算直接进行线性拟合运算,用单片机进行数据处理就显得非常不方便.该文从最小二乘法出发得到了适合单片机计算氡析出率的代数表达式.
语种:
中文
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应用双能X射线测量的骨密度仪
作者:
李志强;屈国普;黄顺
期刊:
衡阳师范学院学报 ,2009年30(03):52-54 ISSN:1673-0313
作者机构:
[李志强] 衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[李志强] 南华大学,核科学技术学院,湖南,衡阳,421001;[黄顺] 衡阳师范学院;[屈国普] 南华大学
关键词:
C8051F020单片机;双能X射线;骨密度测量
摘要:
以高速高性能单片机C8051F020为测量控制核心,采用VC++对高、低两种能量的数据进行分析,设计并实现了应用双能X射线进行测量的骨密度仪,改善了单光子骨密度仪定位困难,测量精度差的缺点。该双能x射线骨密度仪的测量数据显示,其设计已基本达到医用测量标准。
语种:
中文
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Realization of three-qubit controlled-phase gate operation with atoms in cavity QED system
作者:
Tang, Shi-Qing;Zhang, Deng-Yu;Xie, Li-Jun;Zhan, Xiao-Gui;Gao, Feng
期刊:
中国物理快报:英文版 ,2009年26(2) ISSN:0256-307X
通讯作者:
Tang, S.-Q.(tangshiqinghn@163.com)
作者机构:
[Zhang, Deng-Yu; Zhan, Xiao-Gui; Gao, Feng] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan 411005, China;[Tang, Shi-Qing; Xie, Li-Jun] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China<&wdkj&>Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan 411005, China
通讯机构:
[Tang, S.-Q.] D;Department of Physics and Electronic Information Science, , Hengyang 421008, China
摘要:
We propose a scheme for realization of three-qubit controlled-phase gate via passing two three-level atoms through a high-Q optical cavity in a cavity QED system. In the presented protocol, the two stable ground states of the atoms act as the two controlling qubits and the zero- and one-photon Fock states of the cavity-field form the target qubit, and no auxiliary state or any measurement is required. The numerical simulation shows that the gate fidelities remain at a high level under the influence of the atomic spontaneous emission, the decay of the cavity mode and deviation of the coupling strength. The experimental feasibility of our proposal is also discussed. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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基于HUM1500设计的湿度计
作者:
张朝阳
期刊:
衡阳师范学院学报 ,2009年30(06):60-62 ISSN:1673-0313
作者机构:
衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;[张朝阳] 衡阳师范学院
关键词:
湿度计
摘要:
介绍了一种以数字传感器为基础而设计的的湿度计.在该设计中采用HUM1500传感器,这种传感器是将相对湿度转换为电压的传感器.信号处理部分利用的是内带A/D转换器的单片机STC12C2052AD,其A/D转换器将采集的模拟量转换为数字量.数字显示部分采用3块LS164并口显示.该数字湿度计结构简单,准确度高,易读.
语种:
中文
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双磁势垒结构中电子自旋极化输运
作者:
唐振坤;游开明;王友文;唐建平
期刊:
衡阳师范学院学报 ,2009年30(03):44-47 ISSN:1673-0313
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[游开明; 唐建平; 唐振坤; 王友文] 衡阳师范学院
关键词:
双磁势垒;电子输运;自旋极化
摘要:
利用散射矩阵方法研究了双磁势垒结构中二维电子气的自旋极化输运性质.结果表明:电子的自旋极化输运性质与磁场构型、入射电子的能量、入射电子的波矢和外加偏置电压有关.在双磁势垒的磁场结构中只有两磁势垒不对称时,自旋向上和自旋向下的电子的传输概率才发生分离,电子隧穿不对称双磁势垒结构表现出自旋过滤效应.
语种:
中文
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高等师范院校物理学专业课程体系改革研究
作者:
高峰
期刊:
高等理科教育 ,2009年(6):16-19 ISSN:1000-4076
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[高峰] 衡阳师范学院
关键词:
师范;物理学;课程体系;改革
摘要:
文章根据我国基础教育第八次课程改革的主要精神,分析了物理教师教育存在的主要问题,并论述了我们多年来在物理学专业课程体系方面的改革研究和实践体会及设想。
语种:
中文
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对一种新型探测器蒙特卡罗方法模拟验证
作者:
张军民;周剑良;凌球;屈国普;王喜宗
期刊:
衡阳师范学院学报 ,2009年30(03):41-43 ISSN:1673-0313
作者机构:
[张军民] 衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[张军民] 南华大学,核科学与技术学院,湖南,衡阳,421001;[王喜宗; 周剑良; 凌球; 屈国普] 南华大学
关键词:
新型闪烁探测器;蒙特卡罗方法;γ输运
摘要:
介绍了用蒙特卡罗方法模拟光子在一种新型用于总β测量的闪烁探测器中的输运过程,结果表明探测器能使γ本底降低一个数量级左右.
语种:
中文
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大学生班级与寝室管理系统
作者:
胡湘娟
期刊:
科技创新导报 ,2009年(34):208 ISSN:1674-098X
作者机构:
衡阳师范学院物理与电子信息科学系,湖南衡阳,421008
关键词:
数据库管理系统;学生信息;管理系统
摘要:
随着学校的规模不断扩大,学生数量急剧增加,有关学生的各种信息也成倍增长.面对庞大的信息量,有必要开发学生信息管理系统来提高学生管理工作的效率.设计、建立一个关于学生的班级及寝室等信息的管理系统,对班级、寝室相关信息进行科学管理,能快捷、精确地录入、查询、修改各信息.
语种:
中文
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Selective Atom-Cavity Interaction Scheme for Quantum Controlled-NOT Gate Using Four-Level Atoms in Cavity QED System
作者:
Tang Shi-Qing* ;Zhang Deng-Yu;Xie Li-Jun;Zhan Xiao-Gui;Gao Feng
期刊:
理论物理 ,2009年51(2):247-251 ISSN:0253-6102
通讯作者:
Tang Shi-Qing
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Tang Shi-Qing] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
Cavity QED;Controlled-NOT gate;Fidelity;Four-level atom
摘要:
We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom-cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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Effects of Anisotropy on Entanglement in a Two-Qubit Heisenberg XYZ Chain with Intrinsic Decoherence
作者:
Xie Li-Jun* ;Zhang Deng-Yu;Tang Shi-Qing;Zhang Xiao-Gui;Gao Feng
期刊:
理论物理 ,2009年51(4):659-663 ISSN:0253-6102
通讯作者:
Xie Li-Jun
作者机构:
[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhang Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
通讯机构:
[Xie Li-Jun] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
anisotropy;concurrence;intrinsic decoherence;Heisenberg chain
摘要:
Taking the intrinsic decoherence effect into account, the entanglement of a two-qubit anisotropic Heisenberg XYZ chain in the presence of the Dzyaloshinski-Moriya (DM) anisotropic antisymetric interaction is investigated in this paper. Concurrence, the measurement of entanglement, is calculated. Compared with the anisotropic in XY plane, the DM interaction is another kind of anisotropic antisymmetric exchange interaction. It is shown that the intrinsic decoherence obviously suppresses the time evolution of the entanglement. The DM interaction only acts on the time evolution of the entanglement when the initial state is |ψ(0) cosα|01 + α|10 and weakens the degree of entanglement. The anisotropic in XY plane merely impacts on the time evolution of the entanglement when the system is initially in a state |ψ(0) cosα|00 +α|11. The sufficiently weak anisotropic in XY plane can effectively enhance the degree of entanglement. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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一节利用鸡蛋为道具的探究课
作者:
唐建平;李科敏
期刊:
物理教学探讨 ,2009年27(34):15-16 ISSN:1003-6148
作者机构:
衡阳师范学院物理与电子科学系,湖南省,衡阳市,421008;湖南理工学院物理与电子信息系,湖南省,岳阳市,414004;[李科敏] 湖南理工学院;[唐建平] 衡阳师范学院
关键词:
探究;创新性;探究性学习
摘要:
本文通过设计一堂以鸡蛋为道具的探究课,展示以学生为中心的探究过程。体现培养学生进行批判性思考和创造性解决问题能力的重要性,同时为如何培养具有探究技能的教师提供有益探索。
语种:
中文
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A quasi-discrete Hankel transform for nonlinear beam propagation
作者:
You, Kai-Ming;Wen, Shuang-Chun;Chen, Lie-Zun;Wang, You-Wen;Hu, Yong-Hua
期刊:
中国物理B ,2009年18(9):3893-3899 ISSN:1674-1056
通讯作者:
Wen, S.-C.(scwen@vip.sina.com)
作者机构:
School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China;[Hu, Yong-Hua] Key Laboratory of Micro/Nano Optoelectronic Devices, Hunan University, Ministry of Education, Changsha 410082, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[You, Kai-Ming] School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;[Wen, Shuang-Chun] School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>Key Laboratory of Micro/Nano Optoelectronic Devices, Hunan University, Ministry of Education, Changsha 410082, China
通讯机构:
[Wen, S.-C.] S;School of Information Engineering, , Wuhan 430070, China
关键词:
Hankel transform;Kerr medium;Nonlinear propagation
摘要:
We propose and implement a quasi-discrete Hankel transform algorithm based on Dini series expansion (DQDHT) in this paper. By making use of the property that the zero-order Bessel function derivative J′0(0) 0, the DQDHT can be used to calculate the values on the symmetry axis directly. In addition, except for the truncated treatment of the input function, no other approximation is made, thus the DQDHT satisfies the discrete Parseval theorem for energy conservation, implying that it has a high numerical accuracy. Further, we have performed several numerical tests. The test results show that the DQDHT has a very high numerical accuracy and keeps energy conservation even after thousands of times of repeating the transform either in a spatial domain or in a frequency domain. Finally, as an example, we have applied the DQDHT to the nonlinear propagation of a Gaussian beam through a Kerr medium system with cylindrical symmetry. The calculated results are found to be in excellent agreement with those based on the conventional 2D-FFT algorithm, while the simulation based on the proposed DQDHT takes much less computing time. © 2009 Chin. Phys. Soc. and IOP Publishing Ltd.
语种:
英文
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First-principles investigations on elastic properties of α- and β- Ta4 AlC3
作者:
Deng, X. H.* ;Fan, B. B.;Lu, W.
期刊:
Solid State Communications ,2009年149(11-12):441-444 ISSN:0038-1098
通讯作者:
Deng, X. H.
作者机构:
[Deng, X. H.] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.;[Fan, B. B.] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China.;[Fan, B. B.] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China.;[Fan, B. B.] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou, Henan, Peoples R China.;[Lu, W.] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China.
通讯机构:
[Deng, X. H.] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
D. Debye temperature;D. Elastic constants;D. Elastic wave velocity;D. Equation of state
摘要:
The plane-wave pseuclopotential method in the frame of density functional theory (DFT) is adopted to investigate equation of state (EOS), equilibrium structure and elastic constants of alpha- and beta-Ta4AlC3. The calculated structure parameters are in good agreement with the available experimental and theoretical data. Five independent elastic constants of both structures are calculated. Mechanical anisotropy, Elastic wave velocity and Debye temperature for both structures are finally obtained. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
语种:
英文
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医用X光胶片自动录入系统的设计
作者:
黄三伟;赵修良;王文炜
期刊:
衡阳师范学院学报 ,2009年30(06):47-49 ISSN:1673-0313
作者机构:
[黄三伟; 王文炜] 南华大学核科学技术学院,湖南,衡阳,421001;[黄三伟; 王文炜] 衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;[赵修良] 南华大学
关键词:
X光胶片;数字化转换;智能录入系统;数据库管理
摘要:
针对目前医疗机构存在的大量X光胶片难以保存和数字化管理的现状,构建一种专用高效、连续、自动录入系统,实现传统X光胶片的数字化转换及数据库管理,以减少录入工作的成本及工作强度.
语种:
中文
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