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 0.5 Zn0.5Fe2O4 magnetic nanoparticles), obtained by coprecipitation method, are coated with cation poly(ethylenimine) (PEI). We transferred pHRE-Egr1-EGFP into hepatocellular carcinoma Bel-7402 cells, using PEI-MZF-NPs as the carrier and tested some relevant efficacy. The results show that PEI-MZF-NPs have good DNA-binding ability, protection ability, release ability, little toxicity, and high transfection efficiency, obviously superior to those of the liposome method and electricity perforation method. Moreover, the expression level of EGFP gene induced by anoxia and radiation was significantly higher than that of single radiation activation. It is therefore concluded that HRE/Egr1 can induce and improve target gene expression efficiency in cancer anoxic microenvironment, and that PEI-MZF-NPs can be used as a novel nonviral gene vector which offers a viable approach to the mediated radiation gene therapy of cancer. © 2011 Mei Lin et al.

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.




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