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Vacancies and Antisites in B2 FeAl and DO_3 Fe_3Al with a Modified Analytic EAM Model 被引量:4
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作者 Xiaolin SHU, Wan gyu HU, Hanning XIAO and Huiqiu DENG College of Materials Science and Engineering, Hunan University, Changsha 410082, China Ban gwei ZHANG International Centre of Materials Physics, Chinese Academy of Sciences, S 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第6期601-604,共4页
A simple modified analytic EAM model for bcc Fe and fcc Al was used to calculate the lattice constant and elastic constants of B2 FeAl and DO3 Fe3Al alloys. The formation energies of ... A simple modified analytic EAM model for bcc Fe and fcc Al was used to calculate the lattice constant and elastic constants of B2 FeAl and DO3 Fe3Al alloys. The formation energies of vacancy and antisite were also calculated. The present calculations are in agreement with the experimental data and the theoretical results obtained by other authors. 展开更多
关键词 al DO Fe Vacancies and antisites in B2 Feal and DO3 Fe3al with a modified analytic EaM Model EaM
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A Modified Monte Carlo Model of Speckle Tracking of Shear Wave Induced by Acoustic Radiation Force for Acousto-Optic Elasticity Imaging 被引量:3
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作者 李玉娇 黄伟骏 +3 位作者 马风超 王睿 陆明珠 万明习 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第11期54-57,共4页
A modified Monte Carlo model of speckle tracking of shear wave propagation in scattering media is proposed. The established Monte Carlo model mainly concerns the variations of optical electric field and speckle. The t... A modified Monte Carlo model of speckle tracking of shear wave propagation in scattering media is proposed. The established Monte Carlo model mainly concerns the variations of optical electric field and speckle. The two- dimensional intensity distribution and the time evolution of speckles in different probe locations are obtained. The fluctuation of speckle intensity tracks the acoustic-radiation-force shear wave propagation, and especially the reduction of speckle intensity implies attenuation of shear wave. Then, the shear wave velocity is estimated quantitatively on the basis of the time-to-peak algorithm and linear regression processing. The results reveal that a smaller sampling interval yields higher estimation precision and the shear wave velocity is estimated more efficiently by using speckle intensity difference than by using speckle contrast difference according to the estimation error. Hence, the shear wave velocity is estimated to be 2.25 m/s with relatively high accuracy for the estimation error reaches the minimum (0.071). 展开更多
关键词 of on IS for a modified Monte Carlo Model of Speckle Tracking of Shear Wave Induced by acoustic Radiation Force for acousto-Optic Elasticity Imaging by in
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High-density and narrow size-distribution InAs quantum dots formed by a modified two-step growth
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作者 黄社松 牛智川 +4 位作者 詹锋 倪海桥 赵欢 吴东海 孙征 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第1期323-327,共5页
We develop a modified two-step method of growing high-density and narrow size-distribution InAs/GaAs quantum dots (QDs) by molecular beam epitaxy. In the first step, high-density small InAs QDs are formed by optimiz... We develop a modified two-step method of growing high-density and narrow size-distribution InAs/GaAs quantum dots (QDs) by molecular beam epitaxy. In the first step, high-density small InAs QDs are formed by optimizing the continuous deposition amount. In the second step, deposition is carried out with a long growth interruption for every 0.1 InAs monolayer. Atomic force microscope images show that the high-density (~5.9 × 10^11 cm^-2) good size-uniformity InAs QDs are achieved. The strong intensity and narrow linewidth (27.7 meV) of the photoluminescence spectrum show that the QDs grown in this two-step method have a good optical quality. 展开更多
关键词 molecular beam epitaxy quantum dots a modified two-step growth
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A Modified Lattice Model of the Reversible Effect of Axial Strain on the Critical Current of Polycrystalline REBa2Cu3O7-δ Films
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作者 苟晓凡 朱光 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第3期128-132,共5页
The strain effect on the critical current is one of the most important properties for polycrystalline YBa2 Cu3O7-δ (REBCO, RE: rare earth) films, in which the reversible effect is intrinsic in the range of strain ... The strain effect on the critical current is one of the most important properties for polycrystalline YBa2 Cu3O7-δ (REBCO, RE: rare earth) films, in which the reversible effect is intrinsic in the range of strain 0 and the irreversible strain εirr. By introducing the applied strain, a modified grain boundaries (GBs) in the REBCO film is developed. lattice model combining the strain and misorientation of A good agreement of the calculation on the lattice model with the experimental data shows that the lattice model is able to well describe the reversible effect of axial strain on the critical current of the REBCO film, and provides a good understanding of the mechanism of the reversible effect of the strain. Moreover, the effects of the crystallographic texture of the REBCO film and the residual strain εr on the variation of the critical current with the applied strain are extensively investigated. Furthermore by using the developed lattice model, the irreversible strain εirr of the REBCO film can be theoretically determined by comparing the calculation of the critical current-strain curve with the experimental data. 展开更多
关键词 REBCO a modified Lattice Model of the Reversible Effect of axial Strain on the Critical Current of Polycrystalline REBa2Cu3O FILMS Cu
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A MODIFIED METHOD FOR THE PREPARATION OF GOETHITE
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作者 Zhi Long SHEN The Beijing Institute of Light Industry, Beijing, 100037 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第3期213-214,共2页
Synthetic goethite(α-FeOOH) was prepared in the laboratory using a modified version of Brauer's method.The process of steam-crystallization was prolonged and impurities were removed by dialysis.The products have ... Synthetic goethite(α-FeOOH) was prepared in the laboratory using a modified version of Brauer's method.The process of steam-crystallization was prolonged and impurities were removed by dialysis.The products have been characterised by Surface Area Analyser and Scanning Electron Microscope, and proved to have larger Specific Surface Area than that in literature. 展开更多
关键词 FEOOH a modified METHOD FOR THE PREPaRaTION OF GOETHITE
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Novel Minimum Passive Element Realization of All-Pass Network Using A Modified Current Conveyor
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作者 Wu JieDepartment of Electrical Engineering, Hunan University, Changsha, Hunan, China 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1992年第2期78-80,共3页
1. IntroductionA large number of networks for realizing first and second order transfer functions using a currentconveyor have been reported in the literature. Especially, the networks that can offer highinput impedan... 1. IntroductionA large number of networks for realizing first and second order transfer functions using a currentconveyor have been reported in the literature. Especially, the networks that can offer highinput impedance attract attention, for high input impedance has the advantage that the networksmay be used in cascade without requiring impedance matching device. In the Higashimura and 展开更多
关键词 In Novel Minimum Passive Element Realization of all-Pass Network Using a modified Current Conveyor
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Controllable Nucleation of Nanobubbles at a Modified Graphene Surface
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作者 马旺国 张萌 +4 位作者 聂雪川 王春雷 方海平 贺梦冬 张立娟 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第4期77-80,共4页
The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation... The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation of nanobubbles is the key issue for understanding their long lifetime. In this work, using molecular dynamics simulations we modify the substrate (graphene) with charge dipoles in which the local properties of the surface could be changed. Nanobubbles could be stabilized on the local hydrophobic area and modified area with the hydrophilic boundary where gas nuclei are deposited beforehand. Those results provide two methods to control the nucleation of gas nanobubbles and fix them on a target area. 展开更多
关键词 Controllable Nucleation of Nanobubbles at a modified Graphene Surface
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A modified soft docking method for proteins and peptides
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作者 Jun Mei WANG Li Rong CHEN +1 位作者 Fan JING Xiao Jie XU(Department of chemistry and Weixin Institute of Natural Medicine,Peking University, Beijing 100871)(Department of Technical Physics, Peking University, Beijing 100871)(Department of Biophysics, University 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第7期615-618,共4页
A modified two-stage soft-docking procedure was developed for the theoretic researches on the recognition of protein-protein or protein-peptide complexes. Some systems have been used to test our program and the result... A modified two-stage soft-docking procedure was developed for the theoretic researches on the recognition of protein-protein or protein-peptide complexes. Some systems have been used to test our program and the results are encouraging. 展开更多
关键词 a modified soft docking method for proteins and peptides
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Solutions of Zhiber-Shabat and Related Equations Using a Modified tanh-coth Function Method
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作者 Luwai Wazzan 《Journal of Applied Mathematics and Physics》 2016年第6期1068-1079,共12页
The modified tanh-coth function method is used to obtain new exact travelling wave solutions for Zhiber-Shabat equation and the related equations: Liouville equation, sinh-Gordon equation, Dodd-Bullough-Mikhailov equa... The modified tanh-coth function method is used to obtain new exact travelling wave solutions for Zhiber-Shabat equation and the related equations: Liouville equation, sinh-Gordon equation, Dodd-Bullough-Mikhailov equation, and Tzitzeica-Dodd-Bullough equation. Exact travelling wave solutions for each equation are derived and expressed in terms of hyperbolic functions, trigonometric functions and rational functions. The modified tanh-coth function method is easy to execute, brief, efficient, and can be used to solve many other nonlinear evolution equations. 展开更多
关键词 a modified tanh-coth Function Method Zhiber-Shabat Equation Liouville Equation sinh-Gordon Equation Dodd-Bullough-Mikhailov Equation Tzitzeica-Dodd-Bullough Equation Travelling Wave Solutions Solitary Wave Solutions
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Estimation of groundwater flow system parameters using a modified Kalman filter approach
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《Global Geology》 1998年第1期120-120,共1页
关键词 FLOW Estimation of groundwater flow system parameters using a modified Kalman filter approach
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A modified technique for the repair of secondary unilateral cleft nasal deformity
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作者 罗勇 《外科研究与新技术》 2011年第4期269-269,共1页
Objective To investigate the effect of a modified technique for reparing secondary unilateral cleft nasal deformity. Methods Nasal alar cartilage was explosed through dish - like incision,and base of naris was cut to ... Objective To investigate the effect of a modified technique for reparing secondary unilateral cleft nasal deformity. Methods Nasal alar cartilage was explosed through dish - like incision,and base of naris was cut to loosening and replacing the orbicularis oris,releasing 展开更多
关键词 a modified technique for the repair of secondary unilateral cleft nasal deformity
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A MODIFIED PROJECTION AND CONTRACTION METHOD FOR A CLASS OF LINEAR COMPLEMENTARITY PROBLEMS 被引量:12
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作者 B.S. He(Department of Mathematics, Nanjing University, Nanjing, China) 《Journal of Computational Mathematics》 SCIE CSCD 1996年第1期54-63,共10页
Recently, we have proposed an iterative projection and contraction (PC) method for a class of linear complementarity problems (LCP)([4]). The method was showed to be globally convergent, but no statement could be made... Recently, we have proposed an iterative projection and contraction (PC) method for a class of linear complementarity problems (LCP)([4]). The method was showed to be globally convergent, but no statement could be made about the rate of convergence. In this paper, we develop a modified globally linearly convergent PC method for linear complementarity problems. Both the method and the convergence proofs are very simple. The method can also be used to solve some linear variational inequalities. Several computational experiments are presented to indicate that the method is surprising good for solving some known difficult problems. 展开更多
关键词 TH PN a modified PROJECTION aND CONTRaCTION METHOD FOR a CLaSS OF LINEaR COMPLEMENTaRITY PROBLEMS II
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A modified voice conversion algorithm using compressed sensing 被引量:8
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作者 JIAN Zhihua WANG Xiangwen 《Chinese Journal of Acoustics》 2014年第3期323-333,共11页
A voice conversion algorithm,which makes use of the information between continuous frames of speech by compressed sensing,is proposed in this paper.According to the sparsity property of the concatenated vector of seve... A voice conversion algorithm,which makes use of the information between continuous frames of speech by compressed sensing,is proposed in this paper.According to the sparsity property of the concatenated vector of several continuous Linear Spectrum Pairs(LSP)in the discrete cosine transformation domain,this paper utilizes compressed sensing to extract the compressed vector from the concatenated LSPs and uses it as the feature vector to train the conversion function.The results of evaluations demonstrate that the performance of this approach can averagely improve 3.21%with the conventional algorithm based on weighted frequency warping when choosing the appropriate numbers of speech frame.The experimental results also illustrate that the performance of voice conversion system can be improved by taking full advantage of the inter-frame information,because those information can make the converted speech remain the more stable acoustic properties which is inherent in inter-frames. 展开更多
关键词 LPCC a modified voice conversion algorithm using compressed sensing GMM LSP
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Low-cost method of fabricating large-aperture,high efficiency,Fresnel diffractive membrane optic using a modified moir technique 被引量:4
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作者 张健 栗孟娟 +4 位作者 阴刚华 焦建超 刘正坤 徐向东 付绍军 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第10期10-14,共5页
To reduce the cost and achieve high diffraction efficiency, a modified moir@ technique for fabricating a large- aperture multi-level Fresnel membrane optic by a novel design of alignment marks is proposed. The modifie... To reduce the cost and achieve high diffraction efficiency, a modified moir@ technique for fabricating a large- aperture multi-level Fresnel membrane optic by a novel design of alignment marks is proposed. The modified moire fringes vary more sensitively with the actual misalignment. Hence, the alignment accuracy is significantly improved. Using the proposed method, a 20 μm thick, four-level Fresnel diffractive polyimide membrane optic with a 200 mm diameter is made, which exhibits over 62% diffraction efficiency into the +1 order, and an efficiency root mean square of 0.051. 展开更多
关键词 technique Low-cost method of fabricating large-aperture high efficiency Fresnel diffractive membrane optic using a modified moir high
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A modified moire interferometer for three-dimensional displacement measurement 被引量:3
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作者 王卫宁 孙建海 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第7期396-398,共3页
This paper presents a new optical interferometric system, MMI-T/G, composed of a modified four-beam moire interferometer and a Twyman/Green interferometer. The MMI-T/G system can measure three-dimensional displacement... This paper presents a new optical interferometric system, MMI-T/G, composed of a modified four-beam moire interferometer and a Twyman/Green interferometer. The MMI-T/G system can measure three-dimensional displacement fringe patterns with a single loading on the specimen, and the in-plane and out-of-plane displacement fields can be measured independently and defined clearly. The optical setup has the advantages of structural novelty, flexibility, and high fringe contrast. Moreover, the in-plane displacement sensitivity is twice of that of the normal moire interferometer. The measuring techniques to obtain the fringe patterns and displacement fields using the MMI-T/G system are described. The experimental results of thermal displacement of an electronic device are shown. 展开更多
关键词 a modified moire interferometer for three-dimensional displacement measurement
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Thermo-optic characterization of KDP single crystals by a modified Snarmont setup for electro-optic modulation system 被引量:1
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作者 H. L. Saadon M. A. Rahma +2 位作者 Ali F. Marhoon N. Thofanous M. Aillerie 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第7期632-639,共8页
For our KDP crystal orientation, various tbermo-optic (TO) and relevant temperature-dependence param- eters are defined, presented, and studied in the framework of a transverse and a longitudinal electro-optic (EO... For our KDP crystal orientation, various tbermo-optic (TO) and relevant temperature-dependence param- eters are defined, presented, and studied in the framework of a transverse and a longitudinal electro-optic (EO) modulation systems. This study is based on the concept of the so-called opto-electrical bias (~) ap- plied to the system. For both of the above EO-modulation systems, a set of original equations is extracted and investigated with regard to each of the more important TO or temperature coefficients. Using these equations, for these parameters the role of the transverse configuration is examined in comparison with its corresponding longitudinal configuration. A comparison is done with other orientation of the same KDP crystal. 展开更多
关键词 narmont setup for electro-optic modulation system Thermo-optic characterization of KDP single crystals by a modified S KDP
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A modified Gillespie algorithm for E.coli gene regulation systems
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作者 罗若愚 《生物物理学报》 CAS CSCD 北大核心 2009年第S1期10-10,共1页
The dynamics of complex gene regulation systems can be simulated by the Gillespie algorithm. The classic Gillespie algorithm is appropriate to simulate a stochastic
关键词 COLI a modified Gillespie algorithm for E.coli gene regulation systems GENE
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Towards simultaneous observation of path and interference of a single photon in a modified Mach–Zehnder interferometer
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作者 FENGHUA QI ZHIYUAN WANG +2 位作者 WEIWANG XU XUE-WEN CHEN ZHI-YUAN LI 《Photonics Research》 SCIE EI CSCD 2020年第4期622-629,共8页
Classical wisdom of wave-particle duality regulates that a quantum object shows either the particle or wave nature but never both.Consequently,it would be impossible to observe simultaneously the complete wave and par... Classical wisdom of wave-particle duality regulates that a quantum object shows either the particle or wave nature but never both.Consequently,it would be impossible to observe simultaneously the complete wave and particle nature of the quantum object.Mathematically the principle requests that the interference visibility V and whichpath distinguishability D satisfy an orthodox limit of V^2+D^2≤1.The present work reports a new waveparticle duality test experiment using single photons in a modified Mach-Zehnder interferometer to demonstrate the possibility of breaking the limit.The key element of the interferometer is a weakly scattering total internal reflection prism surface,which exhibits a pronounced single-photon interference with a visibility of up to 0.97and simultaneously provides a path distinguishability of 0.83.Apparently,the result of V^2+D^2≈1.63 exceeds the orthodox limit set by the classical principle of wave-particle duality for single photons.We expect that more delicate experiments in the future should be able to demonstrate the ultimate limit of V^2+D^2≈2 and shed new light on the foundations of con temporary quantum mechanics. 展开更多
关键词 SIMULTaNEOUS path and interference a single photon a modified Mach Zehnder interferometer
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A novel 40-Gb/s all-optical inverted wavelength converter based on a modified terahertz optical asymmetric demultiplexer
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作者 黄学田 叶培大 +1 位作者 张民 王凌 《Chinese Optics Letters》 SCIE EI CAS CSCD 2004年第12期691-693,共3页
A novel scheme for all-optical inverted wavelength conversion with 40-Gb/s pseudorandom bit sequences (PRBSs) based on a modified terahertz optical asymmetric demultiplexer (TOAD) is proposed. The performance of the p... A novel scheme for all-optical inverted wavelength conversion with 40-Gb/s pseudorandom bit sequences (PRBSs) based on a modified terahertz optical asymmetric demultiplexer (TOAD) is proposed. The performance of the proposed wavelength converter is analyzed in term of extinction ratio (ER) through numerical simulations. For a typical ER of 10 dB, some key characteristic parameters of the semiconductor optical amplifier (SOA) are designed. With the properly designed parameters, a high quality eye diagram is achievable, indicating that the amplitude fluctuation of the output signal is effectively reduced. 展开更多
关键词 SOa a novel 40-Gb/s all-optical inverted wavelength converter based on a modified terahertz optical asymmetric demultiplexer dBm length CCW
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A MODIFIED CONJUGATE DIRECTION METHOD FOR COMPUTING THE PSEUDOINVERSF
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作者 Zhao Jin-xi (Dept. of Math., Nanjing University, Nanjing,China) 《Journal of Computational Mathematics》 SCIE CSCD 1994年第2期185-194,共10页
In this paper we are concerned with the modified conjugate direction method for computing the pseudoinverse by using an orthogonal basis of the range space of A. Numerical results show that the new method retains some... In this paper we are concerned with the modified conjugate direction method for computing the pseudoinverse by using an orthogonal basis of the range space of A. Numerical results show that the new method retains some main advantages in terms of efficiency and accuracy. 展开更多
关键词 a modified CONJUGaTE DIRECTION METHOD FOR COMPUTING THE PSEUDOINVERSF aTa
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