Title: Exciton binding energy and excitonic absorption spectra in a parabolic quantum wire under transverse electric field
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Abbreviated source title:Eur. Phys. J. B Volume:81 Issue:4
Issue date:June 2011 Publication year:2011 Pages:419-424 Language:English ISSN:14346028 E-ISSN:14346036 Document type:Journal article (JA) Publisher:Springer New York, 233 Springer Street, New York, NY 10013-1578, United States Abstract:By using the method of exact diagonalization, we investigate the quantum correlation measured by quantum discord of the dimerized spin chain at both zero and finite temperatures. The results disclose that the quantum discord is robust at any finite parameter α and temperature T, in contrast to entanglement which shows a sudden death when the parameter α or the temperature T reaches a critical point. At finite temperature, it is interesting to find that the quantum discord QD Number of references:32 Main heading:Quantum entanglement Controlled terms:Spin dynamics Uncontrolled terms:Critical points - Exact diagonalization - Finite temperatures - Low temperatures - Quantum correlations - Quantum phase transitions - Spin chains - Sudden deaths Classification code:931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics DOI:10.1140/epjb/e2011-20280-1 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20112914147796 Title:Bending vibration model for half coated metal core piezoelectric fibe Authors:Bian, Yi-Xiang (1); Qiu, Jinhao (2) Author affiliation:(1) Mechanical Engineering Institute, Yangzhou University, Yangzhou 225127, China; (2) Key Lab of Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China Corresponding author:Bian, Y.-X.(bianyiqiang@163.com) Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering Abbreviated source title:Guangxue Jingmi Gongcheng Volume:19 Issue:6
Issue date:June 2011 Publication year:2011 Pages:1298-1305 Language:Chinese ISSN:1004924X CODEN:GJGOF4 Document type:Journal article (JA) Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China Abstract:A bending vibration model and a dynamic measuring model for a Half Coated Metal Core Piezoelectric Fiber (HMPF) were established. On the basis of the equivalent bending moment from an applying voltage, the bend vibration model of HMPF for a cantilever structure was deduced. According to the first piezoelectric equation, the surface electric displacements, electric charges and the admittances of the HMPF were derived when the resonant exciting voltage was applied. Then, the dynamic measuring model was established to measure the resonant frequencies, anti-resonant frequencies and the low frequency capacitances and to obtain the main parameters, elastic coefficients s Number of references:17 Main heading:Piezoelectricity Controlled terms:Electric fields - Electromechanical coupling - Metal testing - Natural frequencies Uncontrolled terms:Antiresonant frequency - Average values - Bending vibrations - Cantilever structures - Dielectric constants - Dynamic testing - Elastic coefficient - Electric displacement - Electro mechanical coupling factors - Exciting voltage - Half coated - Low frequency - Main parameters - Measuring model - Piezoelectric coefficient - Piezoelectric equation - Piezoelectric vibration - Theoretical simulation - Vibration model Classification code:531 Metallurgy and Metallography - 701.1 Electricity: Basic Concepts and Phenomena - 711.1 Electromagnetic Waves in Different Media DOI:10.3788/OPE.20111906.1298 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20112814137691 Title:One-dimensional two-region model for reactive solute transport with scale-dependent dispersion and its application Authors:Gao, Guang-Yao (1); Feng, Shao-Yuan (2); Ma, Ying (2); Zhan, Hong-Bing (4) Author affiliation:(1) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (2) Yangzhou University, Yangzhou 225009, China; (3) China Agricultural University, Beijing 100083, China; (4) Texas A and M University, College Station, TX 77843, United States Corresponding author:Gao, G.-Y.(ggycau@gmail.com) Source title:Shuili Xuebao/Journal of Hydraulic Engineering Abbreviated source title:Shuili Xuebao Volume:42 Issue:6
Issue date:June 2011 Publication year:2011 Pages:631-640 Language:Chinese ISSN:05599350 CODEN:SLHPBI Document type:Journal article (JA) Publisher:China Water Power Press, no. 1 Xikang Road, Nanjing, 210024, China Abstract:This study proposed a two-region model (TRM) to describe reactive solute transport with scale-dependent dispersion in heterogeneous porous media. The model was derived from the conventional TRM but assumed the dispersivity to be a linear and exponential function of travel distance. The linear adsorption and first-order degradation of solute were also considered in the model. The Laplace transform technique and de Hoog numerical inversion method were applied to solve the developed model. The break-through curves (BTCs) obtained from TRM with scale-dependent and constant dispersion were compared, and the effective dispersivity for TRM with scale-dependent dispersion was calculated by averaging the distance-dependent dispersivity with arithmetic method. This effective dispersivity could reflect the accumulated scale-dependent dispersion effect over the entire travel domain, but discrepancy will occur if the dispersion effect is great. The applicability of the proposed model was tested with concentration data obtained from a 1250 cm long and highly heterogeneous soil column. The simulation results indicated that the TRM with constant and linear distance-dependent dispersivity were unable to describe the measured BTCs in the column adequately, while the TRM with exponential distance-dependent dispersivity satisfactorily captured the evolution of BTCs. Therefore, the proposed TRM with scale-dependent dispersion by assuming the dispersivity to be a function of distance is a simple and practical approach to describe solute transport at relatively large scale in heterogeneous porous media, but the increase of dispersivity with distance is limited as it has bounds. Number of references:21 Main heading:Dispersions Controlled terms:Adsorption - Exponential functions - Geologic models - Laplace transforms - Numerical methods - Porous materials - Solute transport Uncontrolled terms:Break through curve - Concentration data - Constant dispersions - Developed model - Dispersion effect - Dispersivity - First-order - Heterogeneous porous media - Heterogeneous soils - Laplace transform techniques - Linear adsorption - Model application - Numerical inversion - Reactive solutes - Scale-dependent dispersion - Simulation result - Travel distance - Two-region models Classification code:481.1 Geology - 802.3 Chemical Operations - 921 Mathematics - 931 Classical Physics; Quantum Theory; Relativity - 951 Materials Science Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20112814144367 Title:Research of user access problem with source users and relay users in a relay cooperative network Authors:Li, Zhengquan (1); Shi, Peng (2); Chen, Wanpei (2) Author affiliation:(1) Information Engineering College, China Jiliang University Hangzhou 310018, China; (2) Information Engineering College, Yangzhou University Yangzhou 225009, China Corresponding author:Li, Z.(China.lzq722@sina.com) Source title:Advances in Information Sciences and Service Sciences Abbreviated source title:Adv. Inf. Sci. Serv. Sci. Volume:3 Issue:5
Issue date:June 2011 Publication year:2011 Pages:100-107 Language:English ISSN:19763700 Document type:Journal article (JA) Publisher:Advanced Institute of Convergence Information Technology, 707 Seokjang-dong, Gyeongju, BI Center, Room 207, Gyeongju, Gyeongbuk, 780-714, Korea, Republic of Abstract:In this paper, Markov chains are used to model represents a user access problem in a relay cooperative network. In this system source users and relay users are in a opportunistic spectrum access scheme with spectrum handoff. The blocking, dropping, transition probabilities and channel utilization of this system are derived as the performance metrics. Simulate results show that though the channel utilization is certain lost, the blocking, dropping and transition probabilities are greatly reduced with the increasing number of relay channels. And blocking probability is minimum when λ Number of references:11 Main heading:Blocking probability Controlled terms:Markov processes - Probability - Spectroscopy Uncontrolled terms:Channel utilization - Cooperative networks - Dropping probability - Markov Chain - Opportunistic spectrum access - Performance metrics - Relay channels - Spectrum access - Spectrum handoffs - Transition probabilities - User access Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 801 Chemistry - 922.1 Probability Theory DOI:10.4156/aiss.vol3.issue5.13 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20112814134788 Title:Research on hidden markov model-based text categorization process Authors:Li, Kairong (1); Chen, Guixiang (1); Cheng, Jilin (2) Author affiliation:(1) College of Information and Engineering, Yangzhou University, Yangzhou 225009, China; (2) College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China Corresponding author:Li, K. Source title:International Journal of Digital Content Technology and its Applications Abbreviated source title:Int. J. Digit. Content Technol. Appl. Volume:5 Issue:6
Issue date:June 2011 Publication year:2011 Pages:244-251 Language:English ISSN:19759339 Document type:Journal article (JA) Publisher:Advanced Institute of Convergence Information Technology, 707 Seokjang-dong, Gyeongju, BI Center, Room 207, Gyeongju, Gyeongbuk, 780-714, Korea, Republic of Abstract:Automatic text categorization is an important method on dealing with vast amounts of information. It has many mature algorithms, mainly based on statistical methods. However, traditional statistical models didn't reflect the relevance between the text, syntax and semantic information. In this paper, we research the text categorization process based on Hidden Markov Model (HMM). In the training process, we learn the parameters of HMM classifier. The output observation distribution combines 2 statistical and improved TFIDF method, to reflect the semantic relationship in the different categories. In the testing process, evaluate the performance of the established HMM classifier, using the evaluation criteria of Macro-average and Micro-average, and feed back the classifier to improve. In the category process, categorize the new document, using forward-backward algorithm to the HMM classifiers and obtaining the probabilities respectively, comparing them to get the category label with the max probability, which is the final result. The whole process reflects the semantic character in different documents, and improves the accuracy of text categorization by the relationship between text features and categories. Number of references:19 Main heading:Text processing Controlled terms:Algorithms - Hidden Markov models - Semantics Uncontrolled terms:2 statistic - Automatic text categorization - Evaluation criteria - Forward backward algorithms - MI - Semantic information - Semantic relationships - Statistical models - Testing process - Text categorization - Text feature - TFIDF method - Training process - Whole process Classification code:723 Computer Software, Data Handling and Applications - 903 Information Science - 921 Mathematics - 922 Statistical Methods DOI:10.4156/jdcta.vol5.issue6.29 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20112514079136 Title:Growth and stress distributions of negative thermal expansion ZrW Authors:Liu, Hongfei (1); Zhang, Zhiping (2); Zhang, Wei (1); Chen, Xiaobing (1); Cheng, Xiaonong (3) Author affiliation:(1) College of Physics Science and Technology, Yangzhou University, Yangzhou 225009, China; (2) Jianghai College, Yangzhou 225101, China; (3) School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China Corresponding author:Liu, H.(sykt79@ujs.edu.cn) Source title:Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology Abbreviated source title:Zhenkong Kexue yu Jishu Xuebao Volume:31 Issue:3
Issue date:June 2011 Publication year:2011 Pages:253-257 Language:Chinese ISSN:16727126 CODEN:CKKSDV Document type:Journal article (JA) Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China Abstract:The ZrW Number of references:21 Main heading:Thermal expansion Controlled terms:Annealing - Buoyancy - Expansion - Magnetron sputtering - Mechanical properties - Photoelectron spectroscopy - Scanning electron microscopy - Stress concentration - Substrates - X ray diffraction - X ray photoelectron spectroscopy Uncontrolled terms:Annealing temperatures - As-deposited films - Deposition conditions - Film quality - Microstructures and mechanical properties - Negative thermal expansion - rf-Magnetron sputtering - Si substrates - Sputtering power - Stress difference - Surface probes - Surface stress distributions - Target materials - Thermal expansion coefficients - Uniform stress - ZrW Classification code:931.3 Atomic and Molecular Physics - 801 Chemistry - 741.1 Light/Optics - 715.1 Electronic Equipment, non-communication - 951 Materials Science - 631 Fluid Flow - 461 Bioengineering and Biology - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties - 537.1 Heat Treatment Processes DOI:10.3969/j.issn.1672-7126.2011.03.01 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20112814143952 Title:The emulation calculating of the transition on starts the course of bulb type tubular pumping station Authors:Ge, Qiang (1); Tan, Lei (1); Li, Dan-Ping (1); Wu, Hao-Tian (1) Author affiliation:(1) College of Information Engineering Yangzhou Univ., Yangzhou 225009, China Corresponding author:Ge, Q. Source title:Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics Abbreviated source title:Kung Cheng Je Wu Li Hsueh Pao Volume:32 Issue:SUPPL. 1 Issue date:June 2011 Publication year:2011 Pages:69-71 Language:Chinese ISSN:0253231X CODEN:KCJPDF Document type:Journal article (JA) Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China Abstract:Set out from the pump system wholly, use rigid body dynamics, hydrokinetics, water conservancy machinery complete characteristic theory, analyse pump assembly various kinds of dynamics characteristic of the system, it is express large-scale to tubular pump station starting dynamic course mathematics model to tubular pump to set up, in order to be regarded as the example with No3 pumping stations of Huaian, calculate through emulation, announce large-scale to tubular pump station starting transition course various kinds of important parameter change over time the relation such as rotational speed, flow, lift, torque, etc. To pass through, research results tubular pump station design and not safe and reliable to have important theory directive significance to operate rationally passing through. Number of references:10 Main heading:Pumps Controlled terms:Curricula - Machine design - Machinery - Pumping plants Uncontrolled terms:Characteristic theory - Directive significance - Dynamics characteristic - Emulation calculating - Mathematics model - Parameter changes - Pump station - Pump system - Pumping stations - Pumping system starts - Research results - Rigidbody dynamics - Rotational speed - Transition course - Tubular pump - Water conservancy Classification code:446 Waterworks - 601 Mechanical Design - 618.2 Pumps - 901.2 Education Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20112114008975 Title:Preparation and electrochemical behavior of water-soluble inclusion complex of ferrocene with β-cyclodextrin polymer Authors:Zhang, Wang (1); Chen, Ming (1); Diao, Guowang (1) Author affiliation:(1) College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, China Corresponding author:Diao, G.(gwdiao@yzu.edu.cn) Source title:Electrochimica Acta Abbreviated source title:Electrochim Acta Volume:56 Issue:14
Issue date:May 30, 2011 Publication year:2011 Pages:5129-5136 Language:English ISSN:00134686 CODEN:ELCAAV Document type:Journal article (JA) Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom Abstract:A new water-soluble inclusion complex of ferrocene (Fc) with β-cyclodextrin polymer (β-CDP) was prepared by a facile strategy and characterized by 1H NMR spectroscopy, elemental analysis, powder X-ray diffractometry, thermogravimetry, UV-vis spectroscopy and cyclic voltammetry. Compared with Fc and the inclusion complex of Fc with β-cyclodextrin (Fc-β-CD), the solubility of ferrocene-β- cyclodextrin polymer (Fc-β-CDP) was greatly enhanced due to the water-soluble β-CDP host. The ratio of β-cyclodextrin (β-CD) unit in β-CDP to Fc was determined as 1:1. At 25 °C, the dissociated constant of Fc-β-CDP was measured as 3.65 mM by UV-vis spectroscopy and cyclic voltammetry. The electrochemical properties of Fc-β-CDP in water were studied. The diffusion coefficients of oxidation state and reduction state were calculated as 3.52 × 10-7 cm2 s-1 and 3.93 × 10-7 cm2 s-1. The resulting value of standard rate constant was measured as 1.95 × 10-3 cm s-1. The diffusion activation energy was calculated as 21.8 kJ mol-1. © 2011 Elsevier Ltd. All rights reserved. Number of references:33 Main heading:Cyclic voltammetry Controlled terms:Activation energy - Electrochemical properties - Electrochemistry - Industrial chemicals - Iron compounds - Nuclear magnetic resonance spectroscopy - Polymers - Rate constants - Solubility - Thermogravimetric analysis - Ultraviolet spectroscopy - X ray diffraction analysis Uncontrolled terms:Aqueous solubility - Cyclodextrin polymer - Diffusion activation energy - Diffusion Coefficients - Electrochemical behaviors - Elemental analysis - Ferrocenes - H NMR spectroscopy - Inclusion complex - Oxidation state - Reduction state - Standard rate constant - Thermogravimetry - UV-vis spectroscopy - X ray diffractometry Classification code:801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 815.1 Polymeric Materials - 932.2 Nuclear Physics DOI:10.1016/j.electacta.2011.03.062 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20112814128169 Title:High-performance visible-light-driven SnS Authors:Zhang, Yong Cai (1); Du, Zhen Ni (1); Li, Kun Wei (2); Zhang, Ming (1); Dionysiou, Dionysios D. (3) Author affiliation:(1) Key Laboratory of Environmental Material and Environmental Engineering of Jiangsu Province, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; (2) Food and Agriculture Standardization Institute, China National Institute of Standardization, 4 Zhichun Road, Haidian District, Beijing 100088, China; (3) Department of Civil and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012, United States Corresponding author:Zhang, Y.C.(zhangyc@yzu.edu.cn) Source title:ACS Applied Materials and Interfaces Abbreviated source title:ACS Appl. Mater. Interfaces Volume:3 Issue:5
Issue date:May 25, 2011 Publication year:2011 Pages:1528-1537 Language:English ISSN:19448244 E-ISSN:19448252 Document type:Journal article (JA) Publisher:American Chemical Society, 2540 Olentangy River Road, P.O. Box 3337, Columbus, OH 43210-3337, United States Abstract:SnS Yüklə 2,34 Mb. Dostları ilə paylaş:
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