Title: Exciton binding energy and excitonic absorption spectra in a parabolic quantum wire under transverse electric field
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2012.1.4检索 573条 “扬州大学”为著者单位 Accession number:20114414472308 Title:Exciton binding energy and excitonic absorption spectra in a parabolic quantum wire under transverse electric field Authors:Wu, Shudong (1) Author affiliation:(1) College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China Corresponding author:Wu, S.(sdwu@yzu.edu.cn) Source title:Physica B: Condensed Matter Abbreviated source title:Phys B Condens Matter Volume:406 Issue:24
Issue date:December 15, 2011 Publication year:2011 Pages:4634-4638 Language:English ISSN:09214526 CODEN:PHYBE3 Document type:Journal article (JA) Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands Abstract:The effects of transverse electric field on the energy levels of electron and heavy hole, exciton binding energy and excitonic absorption spectra of GaAs parabolic quantum wire are theoretically investigated in detail. The results indicate that the electron and hole energy levels, exciton binding energy, excitonic absorption coefficient and absorption energy becomes smaller with the increase of electric field. That is more significant at the condition of weaker parabolic confinement potential. The phenomena can be explained by the separation of overlap integral of the electron and hole at the ground states. © 2011 Elsevier B.V. All rights reserved. Number of references:27 Main heading:Binding energy Controlled terms:Absorption - Absorption spectra - Chemical bonds - Electric fields - Excitons - Light absorption - Molecular orbitals - Nanowires - Potential energy - Semiconductor quantum wells - Semiconductor quantum wires - Wave functions - Wire Uncontrolled terms:Absorption energies - Electron and hole energies - Exciton binding energy - Excitonic absorption - Excitonic absorption spectra - GaAs - Heavy holes - Overlap integrals - Parabolic confinements - Parabolic quantum wire - Transverse electric field Classification code:931 Classical Physics; Quantum Theory; Relativity - 921 Mathematics - 801.4 Physical Chemistry - 761 Nanotechnology - 933 Solid State Physics - 741.1 Light/Optics - 711 Electromagnetic Waves - 701.1 Electricity: Basic Concepts and Phenomena - 535.2 Metal Forming - 714.2 Semiconductor Devices and Integrated Circuits DOI:10.1016/j.physb.2011.09.047 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20114614527271 Title:Potentiometric detection of chromium (III) on the carbon fiber electrode modified by n-hexyl calix[4]resorcinarene Authors:Qiao, Qiuju (1); Jin, Gendi (1); Hu, Xiaoya (1) Author affiliation:(1) College of Chemistry and Chemical Engineering, Yangzhou University, 88 South University Avenue, Yangzhou 225002, China Corresponding author:Hu, X.(xyhu@yzu.edu.cn) Source title:Sensors and Actuators, B: Chemical Abbreviated source title:Sens Actuators, B Chem Volume:160 Issue:1
Issue date:December 15, 2011 Publication year:2011 Pages:87-93 Language:English ISSN:09254005 CODEN:SABCEB Document type:Journal article (JA) Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands Abstract:This study was carried out to develop the application of modified carbon fiber electrode in environmental detection, by which chromium (III) ion in water could be electrochemically detected. The modified carbon fiber electrode manifested a linear response within the range of 1.9 × 10-6-4.6 × 10-4 mol L-1 (R = 0.9939) and the detection limit was 7.9 × 10-7 mol L-1. The effect factors were studied to reveal the optimal conditions in the detection of chromium (III) in water, such as pH of total ionic strength adjustment buffer, the concentration of calix[4]resorcinarene, sweep cycles, and so on. The modified carbon fiber electrode, the diameter of which was about 7 μm, was characterized by field emission scanning electron microscopy and electrochemical impedance spectroscopy. Also, the proper mechanism was discussed. The identification of chromium (III) was mainly attributed to the cavity of the calix[4]resorcinarene that the chromium (III) ion could enter into the inner of calix[4]resorcinarene because of the particular structure of calix[4]resorcinarene. © 2011 Published by Elsevier B.V. All rights reserved. Number of references:46 Main heading:Carbon fibers Controlled terms:Chromium - Electrochemical impedance spectroscopy - Fibers - Field emission microscopes - Ionic strength - pH effects - Potentiometers (electric measuring instruments) - Scanning electron microscopy Uncontrolled terms:Calix[4]resorcinarenes - Carbon fiber electrodes - Detection limits - Effect factors - Environmental detection - Field emission scanning electron microscopy - Linear response - Modified carbon - n-Hexyl calix[4]resorcinarene - Optimal conditions - Potentiometric - Potentiometric detection Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 942.1 Electric and Electronic Instruments - 801 Chemistry - 741.1 Light/Optics - 543.1 Chromium and Alloys - 741.3 Optical Devices and Systems DOI:10.1016/j.snb.2011.07.017 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20114614510606 Title:Effects of the spin-orbit coupling on magnetic and superconducting properties in iron-based superconductors Authors:Ye, Xiao-Shan (1) Author affiliation:(1) College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China Corresponding author:Ye, X.-S.(xsye@yzu.edu.cn) Source title:Physica C: Superconductivity and its Applications Abbreviated source title:Phys C Supercond Appl Volume:471 Issue:23-24 Issue date:December 2011 Publication year:2011 Pages:1602-1605 Language:English ISSN:09214534 CODEN:PHYCE6 Document type:Journal article (JA) Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands Abstract:We analyze the magnetic properties through two-orbital Hubbard model with the spin-orbit coupling (SOC) interaction in the iron-based superconductors. With the help of the Ising approximation for the Hund's coupling between the itinerant electrons and the localized spins, we give a self-consistent account of the various magnetic orders observed in pnictides and the pairing symmetry. We also calculate the local density of states (LDOS) of the vortex state when a magnetic field is applied. The LDOS without SOC shows no resonant peak at the vortex core center in the superconducting state, while it shows an obvious resonant peak when SOC is applied. © 2011 Elsevier B.V. All rights reserved. Number of references:37 Main heading:Superconductivity Controlled terms:Magnetic fields - Magnetic properties - Superconducting materials - Vortex flow Uncontrolled terms:Hund's coupling - Iron-based - Itinerant electrons - Local density of state - Localized spin - Magnetic orders - Pairing symmetries - Pnictides - Resonant peaks - Spin-orbit couplings - Superconducting properties - Superconducting state - Vortex cores - Vortex state Classification code:631.1 Fluid Flow, General - 701.2 Magnetism: Basic Concepts and Phenomena - 708.3 Superconducting Materials DOI:10.1016/j.physc.2011.09.006 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20113514270303 Title:Turing pattern formation in a predatorpreymutualist system Authors:Tian, Canrong (1); Ling, Zhi (2); Lin, Zhigui (2) Author affiliation:(1) Department of Basic Science, Yancheng Institute of Technology, Yancheng 224003, China; (2) School of Mathematical Science, Yangzhou University, Yangzhou 225002, China Corresponding author:Tian, C.(unfoxeses@yahoo.com.cn) Source title:Nonlinear Analysis: Real World Applications Abbreviated source title:Nonlinear Anal. Real World Appl. Volume:12 Issue:6
Issue date:December 2011 Publication year:2011 Pages:3224-3237 Language:English ISSN:14681218 Document type:Journal article (JA) Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom Abstract:In this paper, we develop a theoretical framework about spatial patterns in a three-species predatorpreymutualist system with cross-diffusion. We concentrate on three aspects of Turing pattern formation: (1) what conditions enable the occurrence of Turing patterns? (2) what are the underlying mechanisms? (3) what are the corresponding configurations? For the first two questions, by use of the stability analysis for the positive uniform solution and the LeraySchauder degree theory, we prove that under some conditions, the system admits at least a nonhomogeneous stationary solution. For the third question, we carry out numerical simulations for a Turing pattern, and we show that the configurations of Turing pattern are stable spotted patterns, which resemble a real ecosystem. © 2011 Elsevier Ltd. All rights reserved. Number of references:53 Uncontrolled terms:Cross-diffusion - Leray-Schauder degree theory - Non-homogeneous - Spatial patterns - Stability analysis - Stationary solutions - Theoretical framework - Turing patterns - Underlying mechanism DOI:10.1016/j.nonrwa.2011.05.022 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20113214219817 Title:On reaction-diffusion equations derived from a PEPA model Authors:Ding, Jie (1); Lin, Zhigui (2); Yu, Ting (2) Author affiliation:(1) College of Information Engineering, Yangzhou University, Yangzhou 225002, China; (2) School of Mathematical Science, Yangzhou University, Yangzhou 225002, China Corresponding author:Lin, Z.(zglin@yzu.edu.cn) Source title:Applied Mathematics Letters Abbreviated source title:Appl Math Lett Volume:24 Issue:12
Issue date:December 2011 Publication year:2011 Pages:2072-2076 Language:English ISSN:08939659 CODEN:AMLEEL Document type:Journal article (JA) Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom Abstract:This work presents an extension of the fluid approximation to the diffusion approximation for a PEPA model. The diffusion approximation leads to a reactiondiffusion system in which the spatial or location information is considered, while it is ignored in the fluid approximation approach. The fundamental results for the solution of the reactiondiffusion equations, such as the existence, uniqueness, positivity and convergence, have been established. Numerical simulations are also given to illustrate the analytical results. © 2011 Elsevier Ltd. All rights reserved. Number of references:11 Main heading:Diffusion Controlled terms:Linear equations - Partial differential equations Uncontrolled terms:Analytical results - Convergence - Diffusion approximations - Fluid approximation - Fluid approximation approach - Location information - PEPA - Reaction diffusion systems - Reactiondiffusion equations Classification code:921 Mathematics - 921.2 Calculus - 931.1 Mechanics DOI:10.1016/j.aml.2011.05.045 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20114714548315 Title:An evaluation on transfection efficiency of pHRE-Egr1-EGFP in hepatocellular carcinoma cells Bel-7402 mediated by PEI-MZF-NPs Authors:Lin, Mei (1); Zhang, Dongsheng (1); Huang, Junxing (2); Zhang, Jia (1); Wang, Li (2); Guo, Ting (2); Xiao, Li (2); Ye, Jun (2); Zhang, Lixin (2) Author affiliation:(1) Medical School of Southeast University, Jiangsu Province, Nanjing 210009, China; (2) Taizhou People's Hospital, Yangzhou University, Jiangsu Province, Taizhou 225300, China Corresponding author:Zhang, D.(zdszds1222@163.com) Source title:Journal of Nanomaterials Abbreviated source title:J. Nanomater. Volume:2011 Issue date:2011 Publication year:2011 Article number:136052 Language:English ISSN:16874110 E-ISSN:16874129 Document type:Journal article (JA) Publisher:Hindawi Publishing Corporation, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States Abstract:To improve transfection and expression efficiency of target gene, especially under cancer anoxic microenvironment, we have developed pHRE-Egr1-EGFP/PEI-MZF-NPs nanosystem, in which pHRE-Egr1-EGFP, eukaryotic gene expression plasmid, is constructed by combining radiation promoter Egr1 with anoxia induction components (HRE), forming anoxic radiation double sensitive HRE/Egr1 promoter to activate reporter gene EGFP expression. MZF-NPs (Mn Number of references:36 Main heading:Gene expression Controlled terms:Anoxic sediments - Diseases - Efficiency - Gene therapy - Manganese - Molecular biology - Nanomagnetics - Nanoparticles - Radiotherapy Uncontrolled terms:Coprecipitation method - DNA-binding - Eukaryotic gene expression - Expression efficiency - Expression levels - Gene vectors - Hepatocellular carcinoma - Hepatocellular carcinoma cell - Magnetic nanoparticles - Microenvironments - Nonviral - Polyethylenimines - Reporter gene - Single radiation - Target gene expression - Target genes - Transfection efficiency Classification code:913.1 Production Engineering - 761 Nanotechnology - 708 Electric and Magnetic Materials - 933 Solid State Physics - 701.2 Magnetism: Basic Concepts and Phenomena - 483 Soil Mechanics and Foundations - 461 Bioengineering and Biology - 543.2 Manganese and Alloys DOI:10.1155/2011/136052 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20114714544749 Title:Spatiotemporal evolution characteristics of precipitation in Tarim River Basin during 1960-2009 Authors:Wu, Yongping (1); Wang, Chenghai (1); Shen, Yongping (2) Author affiliation:(1) College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; (2) Cold and Arid Regions Environmental and Engineering, Research Institute, Chinese Academy of Sciences, Lanzhou, China; (3) College of Physics Science and Technology, Yangzhou University, Yangzhou, China Corresponding author:Wu, Y.(wuyp1888@sina.com) Source title:2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings Abbreviated source title:Int. Conf. Electron., Commun. Control, ICECC - Proc. Monograph title:2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings Issue date:2011 Publication year:2011 Pages:3923-3925 Article number:6066465 Language:Chinese ISBN-13:9781457703218 Document type:Conference article (CA) Conference name:2011 International Conference on Electronics, Communications and Control, ICECC 2011 Conference date:September 9, 2011 - September 11, 2011 Conference location:Ningbo, China Conference code:87394 Sponsor:Ningbo University Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States Abstract:Using U.S. NCEP / NCAR monthly mean reanalysis data (2.5×2.5) and daily precipitation data at 26 weather stations in Tarim River Basin from 1960 to 2009, spatiotemporal evolution characteristics of precipitation over Tarim River Basin (TRB) were analyzed. The results show that: 1) The spatial distribution of precipitation in TRB was in contrast with that in China, showing a gradual increase trend from southeast to northwest with some variation in different seasons and the year with more (less) rainfall; 2)The annual change in precipitation over mountains, plains and five sub-regions were likely consistent, and the decadal mutation of precipitation in around 1987 and 2003 appeared at almost all regions; 3)During the period of 1978 to 2003 in which global warming was the most significant, precipitation over mountain showed an clear increasing trend, while the precipitation over plain showed decreasing trend. It can be believed that the complexity of spatiotemporal distribution of precipitation over TRB implied a variety of precipitation mechanisms in this area, and the warm and wet evidence in western Tianshan Mountains may be the signal that global warming is accelerating the local water cycle. © 2011 IEEE. Number of references:26 Main heading:River control Controlled terms:Global warming - Landforms - Precipitation (chemical) - Spatial distribution - Water vapor - Watersheds Uncontrolled terms:Annual change - Precipitation data - Precipitation mechanism - Reanalysis - Spatiotemporal distributions - Spatiotemporal evolution - Sub-regions - Tarim River basin - Water cycle - Weather stations - Western Tianshan Classification code:444.1 Surface Water - 451 Air Pollution - 481.1 Geology - 641 Heat and Mass Transfer; Thermodynamics - 802.3 Chemical Operations - 921 Mathematics DOI:10.1109/ICECC.2011.6066465 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc.
Accession number:20114714538818 Title:Analysis on spatial -temporal landscape pattern and ecological security in Zhangjiagang city using 3S technologies and CA model Authors:Sun, Chengming (1); Gan, Xiaoyu (2); Chen, Yizhao (2); Sun, Zhengguo (2); Li, Jianlong (2) Author affiliation:(1) Agricultural College, Yangzhou University, Yangzhou, China; (2) College of Life Science, Nanjing University, Nanjing, China Corresponding author:Li, J.(jl.li56@yahoo.cn) Source title:Proceedings - 2011 International Conference on Internet Computing and Information Services, ICICIS 2011 Abbreviated source title:Proc. - Int. Conf. Internet Comput. Inf. Serv., ICICIS Monograph title:Proceedings - 2011 International Conference on Internet Computing and Information Services, ICICIS 2011 Issue date:2011 Publication year:2011 Pages:187-190 Article number:6063226 Language:English ISBN-13:9780769545394 Document type:Conference article (CA) Conference name:2011 International Conference on Internet Computing and Information Services, ICICIS 2011 Conference date:September 17, 2011 - September 18, 2011 Conference location:Hong Kong, Hong kong Conference code:87321 Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States Abstract:In order to certain the landscape pattern and ecological security in Zhangjiagang, the landscape characteristics of urbanization phase and suburbanization phase were analyzed, using remotely sensed imageries between 1991-2006, land use maps and GIS technology, combined with urban-suburban-rural gradient research. Based on the landscape changing and its driving force analysis, the regional Cultivated Land Instability Degree (CLID) of 2004 was defined and calculated. The ecological security of Zhangjiagang between 2003-2007 was also assessed to research the impacts of urbanization on urban ecological security. The urbanization process in Zhangjiagang matched the cyclic model and the diffusion wave theory and for casted the future land use/cover using CA Model. The effects of urbanization appeared in urban areas firstly, and then in rural areas. Two kinds of urban expansion patterns were detected in Zhangjiagang. The first one was from edge-expansion to infilling growth, the second one was from edge-expansion to spontaneous growth, and then to edge-expansion. Among all the agricultural ecological deficit, the largest proportion was the grassland ecological deficit, and agricultural ecological deficit increased by 16.22% from 2003 to 2007. This study had proved that the agricultural development was not sustainable in Zhangjiagang in recent years. © 2011 IEEE. Number of references:6 Main heading:Ecology Controlled terms:Expansion - Information services - Internet - Land use - Remote sensing - Rural areas Uncontrolled terms:CA model - Ecological deficit - Landscape pattern - Urban-rural - Urbanization Classification code:903.4 Information Services - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 951 Materials Science - 718 Telephone Systems and Related Technologies; Line Communications - 716 Telecommunication; Radar, Radio and Television - 454.3 Ecology and Ecosystems - 403 Urban and Regional Planning and Development - 717 Optical Communication DOI:10.1109/ICICIS.2011.54 Database:Compendex Compilation and indexing terms, Copyright 2011 Elsevier Inc. Accession number:20114614522492 Title:Analyzing the performance of dither modulation in presence of composite attacks Authors:Zhu, Xinshan (1) Author affiliation:(1) Information Engineering College, Yangzhou University, Yangzhou 225007, China Corresponding author:Zhu, X.(xszhu_hm@hotmail.com) Source title:Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Abbreviated source title:Lect. Notes Comput. Sci. Volume:7043 LNCS Monograph title:Information and Communications Security - 13th International Conference, ICICS 2011, Proceedings Issue date:2011 Publication year:2011 Pages:297-305 Language:English ISSN:03029743 E-ISSN:16113349 ISBN-13:9783642252426 Document type:Conference article (CA) Conference name:13th International Conference on Information and Communications Security, ICICS 2011 Conference date:November 23, 2011 - November 26, 2011 Conference location:Beijing, China Conference code:87293 Sponsor:National Natural Science Foundation of China (NNSFC); The Microsoft Corporation; Beijing Tip Technology Corporation; Trusted Computing Group (TCG) Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany Abstract:In this paper, we analyze the performance of dither modulation (DM) against the composite attacks including valumetric scaling, additive noise and constant change. The analyses are developed under the assumptions that the host vector and noise vector are mutually independent and both of them have independently and identically distributed components. We derive the general expressions of the probability density functions of several concerned signals and the decoding error probability. The specific analytical results are presented for the case of generalized Gaussian host signal. Numerical simulations confirm the validity of the given theoretical analyses. © 2011 Springer-Verlag. Yüklə 2,34 Mb. Dostları ilə paylaş:
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