Title: Exciton binding energy and excitonic absorption spectra in a parabolic quantum wire under transverse electric field

Classification code:933 Solid State Physics - 804.1 Organic Compounds - 802.2 Chemical Reactions - 801 Chemistry - 933.1.1 Crystal Lattice - 761 Nanotechnology - 741.1 Light/Optics - 708 Electric and Magnetic Materials - 546.2 Tin and Alloys - 741.3 Optical Devices and Systems

DOI:10.1016/j.seppur.2011.07.016

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20112314032833

Title:Coincorporation of nano-silica and nano-calcium carbonate in polypropylene

Authors:Zhang, Shilian (1); Zhu, Aiping (1); Dai, Sheng (2)

Author affiliation:(1) Department of Polymer Material and Engineering, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; (2) Department of Polymer Science, School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005, Australia

Corresponding author:Zhu, A.([e-mail])

Source title:Journal of Applied Polymer Science

Abbreviated source title:J. Appl. Polym. Sci.

Volume:121

Issue:5

Issue date:September 5, 2011

Publication year:2011

Pages:3007-3013

Language:English

ISSN:00218995

E-ISSN:10974628

CODEN:JAPNAB

Document type:Journal article (JA)

Publisher:John Wiley and Sons Inc., P.O.Box 18667, Newark, NJ 07191-8667, United States

Abstract:In this study, various polypropylene (PP) nanocomposites were prepared by melt blending method. The effects of different spherical nanofillers, such as 50 nm CaCO3 and 20 nm SiO2, on the linear viscoelastic property, crystallization behavior, morphology and mechanical property of the resulting PP nanocomposites were examined. Rheological study indicated that coincorporation of nano-SiO2 and nano-CaCO3 favored the uniform dispersion of nanoparticles in the PP matrix. Differential scanning calorimeter (DSC) and polarizing optical microscopy (POM) studies revealed that the coincorporation of SiO2 and CaCO3 nanoparticles could effectively improve PP crystallizability, which gave rise to a lower supercooling temperature (ΔT), a shorter crystallization half-life (t 1/2) and a smaller spherulite size in comparison with those nanocomposites incorporating only one type of CaCO3 or SiO 2 nanoparticles. The mechanical analysis results also showed that addition of two types of nanoparticles into PP matrix gave rise to enhanced performance than the nanocomposites containing CaCO3 or SiO 2 individually. © 2011 Wiley Periodicals, Inc.

Number of references:22

Main heading:Calcium carbonate

Controlled terms:Blending - Crystallization - Differential scanning calorimetry - Mechanical properties - Nanocomposites - Nanoparticles - Optical microscopy - Resins - Rheology - Silica - Silicon compounds - Thermoplastics

Uncontrolled terms:Crystallizability - Crystallization behavior - Differential scanning calorimeters - Enhanced performance - Linear viscoelastic - Mechanical analysis - Melt-blending methods - Morphology and mechanical properties - Nano calcium carbonate - Nano- SiO - Nano-CaCO - Nano-fillers - Nano-silica - particle-reinforcement - Polarizing optical microscopy - PP matrix - PP nanocomposite - rheological properties - Rheological studies - Super-cooling temperature - thermoplastic resin - Uniform dispersions

Classification code:951 Materials Science - 933 Solid State Physics - 931.1 Mechanics - 815.1.1 Organic Polymers - 812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 802.3 Chemical Operations - 801 Chemistry - 761 Nanotechnology - 741.1 Light/Optics - 708 Electric and Magnetic Materials

DOI:10.1002/app.33925

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20113414248783

Title:Tetraphenylethylene-based glycoconjugate as a fluorescence "turn-on" sensor for cholera toxin

Authors:Hu, Xin-Ming (1); Chen, Qi (1); Wang, Jin-Xiang (1); Cheng, Qian-Yi (1); Yan, Chao-Guo (3); Cao, Jie (4); He, Yu-Jian (2); Han, Bao-Hang (1)

Author affiliation:(1) National Center for Nanoscience and Technology, Beijing 100190, China; (2) College of Chemistry and Chemical Engineering, Graduate University, Chinese Academy of Sciences, Beijing 100049, China; (3) College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; (4) MOE Key Laboratory of Cluster Science, Department of Chemistry, Beijing Institute of Technology, Beijing 100081, China

Corresponding author:Cao, J.([e-mail])

Source title:Chemistry - An Asian Journal

Abbreviated source title:Chem. Asian J.

Volume:6

Issue:9

Issue date:September 5, 2011

Publication year:2011

Pages:2376-2381

Language:English

ISSN:18614728

E-ISSN:1861471X

Document type:Journal article (JA)

Publisher:John Wiley and Sons Ltd, Southern Gate, Chichester, West Sussex, PO19 8SQ, United Kingdom

Abstract:Tetraphenylethylene (TPE)-based glycoconjugates were easily synthesized by copper(I)-catalyzed "click reactions" between propargyl-attached TPE and azido-functionalized sugars. The TPE compound bearing lactosyl moieties (Lac-TPE) was found to be a fluorescence "turn-on" sensor for cholera toxin by virtue of aggregation-induced emission characteristics of the TPE motif owing to the specific interaction of lactose with the cholera toxin B subunit, whilst a cellobiose-functionalized TPE derivative did not show any response to the toxin. Therefore, Lac-TPE shows promising applications in the detection of cholera toxin, as well as in the investigation of carbohydrate-protein interaction. Copyright © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Number of references:37

Main heading:Toxic materials

Controlled terms:Fluorescence - Sensors - Sugars

Uncontrolled terms:Aggregation-induced emissions - Carbohydrate-protein interactions - Cholera toxin - Cholera toxin B subunit - Click reaction - Glycoconjugates - lactose - Specific interaction - Tetraphenylethylene

Classification code:741.1 Light/Optics - 801 Chemistry - 804 Chemical Products Generally - 804.1 Organic Compounds

DOI:10.1002/asia.201100141

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114214445381

Title:Spherical reluctance driving joint with magnetic levitation modeling and inverse system decoupling control

Authors:Zeng, Li (1); Wang, Jun (1); Xu, Yuanyuan (1)

Author affiliation:(1) College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

Corresponding author:Zeng, L.([e-mail])

Source title:Jixie Gongcheng Xuebao/Journal of Mechanical Engineering

Abbreviated source title:Jixie Gongcheng Xuebao

Volume:47

Issue:17

Issue date:September 5, 2011

Publication year:2011

Pages:15-21

Language:Chinese

ISSN:05776686

CODEN:CHHKA2

Document type:Journal article (JA)

Publisher:Editorial Office of Chinese Journal of Mechanical, 22 Baiwanzhuang Dajie, Beijing, 100037, China

Abstract:Multi-DOF spherical initiative joint droved by spherical motor directly. It has high mechanical integration and advantage in the control and trajectory planning. But when the joint works, the friction and wear due to mechanical support, resulting in joint components fever, leading to joint static and dynamic performance deteriorated. Based on the motor technology, magnetic levitation technology and robot technology, presents a no mechanical friction and wear, no lubrication reluctance many degrees of freedom magnetic suspension ball joint initiative structure. Its working principle is that according to the air gap magnetic of active joint, derivate rotation angle displacement and radial displacement of the spherical rotor and calculated the total levitation force and electromagnetic torque model in a joint derivation coordinates. Based on the levitation force and torque model, it established active joint system dynamics model and inverse model. The inverse system model is as a decoupling controller, decoupling the prototype system and get pseudo-linear system. The systems controlled by the pseudo-linear state feedback closed-loop, and its simulation study. Simulation results show that the system has good dynamic response and robust anti-jamming features. © 2011 Journal of Mechanical Engineering.

Number of references:10

Main heading:Suspensions (components)

Controlled terms:Dynamic response - Friction - Linear systems - Magnetic levitation - Magnetic levitation vehicles - Magnetism - Mathematical models - Spheres - State feedback

Uncontrolled terms:Air-gaps - Anti-jamming - Ball joints - Closed-loop - Decoupling controllers - Decoupling controls - Driving joints - Electromagnetic torques - Friction and wear - Inverse models - Inverse system - Inverse system model - Joint system - Levitation force - Magnetic suspension - Mechanical friction - Mechanical integration - Mechanical support - Motor technology - Multi-DOF - Prototype system - Radial displacements - Robot technology - Rotation angles - Simulation result - Simulation studies - Spherical motor - Spherical rotor - Static and dynamic performance - Torque model - Trajectory Planning - Working principles

Classification code:931.1 Mechanics - 921 Mathematics - 731.1 Control Systems - 701.2 Magnetism: Basic Concepts and Phenomena - 631 Fluid Flow - 601.2 Machine Components - 408.1 Structural Design, General

DOI:10.3901/JME.2011.17.015

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20113514289692

Title:Influence of depositing parameters on microstructure of Ni-Co pulse plating

Authors:Gao, Ji-Cheng (1); Jin, Hui-Ming (1); Zhang, Jiqun (1); Shi, Jun (1); Li, Lu (1)

Author affiliation:(1) College of Mechanical Engineering, Yangzhou University, Yangzhou, China

Corresponding author:Jin, H.-M.([e-mail])

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:84-85

Monograph title:Green Power, Materials and Manufacturing Technology and Applications, GPMMTA2011

Issue date:2011

Publication year:2011

Pages:86-90

Language:English

ISSN:16609336

ISBN-13:9783037852248

Document type:Conference article (CA)

Conference name:International Conference on Green Power, Materials and Manufacturing Technology and Applications, GPMMTA2011

Conference date:July 15, 2011 - July 18, 2011

Conference location:Chongqing, China

Conference code:86279

Sponsor:National Natural Science Foundation of China (NSFC)

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Influence of the pulse currents, the pulse frequency and CoSO4 content of plating solution on Co content of Ni-Co alloy coatings are investigated by environmental scanning electronic microscopy and field emission scanning electronic microscope. The result shows that Co content of Ni-Co alloy coating increases as the increase of CoSO4 content and pulse frequency. Co content of Ni-Co alloy coating increases when the current density decrease. When CoSO4 content of plating solution and the pulse frequency increase, the coating surface become smoother, microstructure become denser and coating grain refinement. when current density is small, coating crystalline grains size are tiny and the coating crystalline grains arrangement is relatively close. In the Ni-Co electrodepositing process, the combining of Ni²⁺ and Co²⁺ generates [CoNi (II)] intermediate products, then the decomposion of [CoNi (II)] generate Co and Ni²⁺. This hinders sedimentation of Ni²⁺ ions and increases sedimentary speed of Co²⁺ ion. Polarization of electrodeposited cobalt is lager than polarization of electrodeposited nickel. So as the current density increases, nickel deposition relative faster than cobalt, thus leads to the cobalt content of coating decreased. The recovering frequency of metal ion concentration in pulse spread layer rise at the fixed time as pulse frequency increases. © (2011) Trans Tech Publications.

Number of references:9

Main heading:Nickel coatings

Controlled terms:Alloys - Coatings - Cobalt - Cobalt alloys - Crystalline materials - Current density - Electroplating - Grain refinement - Manufacture - Metal cladding - Metal ions - Microstructure - Nickel plating - Polarization

Uncontrolled terms:Co content - Coating surface - Cobalt content - Crystalline grains - Depositing parameters - Electro-deposited nickel - Electrodeposited cobalt - Electronic microscopes - Environmental scanning - Field emission scanning - Fixed time - Intermediate product - Metal ion concentration - Ni-co alloy coatings - Nickel deposition - Plating solutions - Pulse currents - Pulse frequencies - Pulse plating

Classification code:813.2 Coating Materials - 701.1 Electricity: Basic Concepts and Phenomena - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 539.3.1 Electroplating - 539.3 Metal Plating - 538.2 Welding - 537.1 Heat Treatment Processes - 531.2 Metallography - 531.1 Metallurgy

DOI:10.4028/www.scientific.net/AMM.84-85.86

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614507509

Title:Reduced fidelity, entanglement and quantum phase transition in the one-dimensional bond-alternating S = 1 Heisenberg chain

Authors:Jiang, J.J. (1); Liu, Y.J. (2); Tang, F. (3); Yang, C.H. (4)

Author affiliation:(1) Department of Physics, Sanjiang College, Nanjing 210012, China; (2) School of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China; (3) Department of Electronic and Information Engineering, Yangzhou Polytechnic Institute, Yangzhou 225002, China; (4) Faculty of Mathematics and Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China

Corresponding author:Jiang, J.J.([e-mail])

Source title:European Physical Journal B

Abbreviated source title:Eur. Phys. J. B

Volume:83

Issue:1

Issue date:September 2011

Publication year:2011

Pages:1-5

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 density-matrix renormalization group, the reduced fidelity and entanglement in the one-dimensional bond-alternating S = 1 Heisenberg chain are investigated. The results demonstrate that the quantum phase transition from the Haldane phase to the dimer phase can be characterized by the reduced fidelity and the first derivation of the entanglement entropy. Through the finite-size scaling, the critical point and the critical exponent of the correlation length are obtained accurately. © 2011 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

Number of references:50

Main heading:Quantum entanglement

Controlled terms:Phase transitions - Statistical mechanics

Uncontrolled terms:Correlation lengths - Critical exponent - Critical points - Density matrix renormalization group - Entanglement entropy - Finite size scaling - Haldane - Heisenberg chains - Quantum phase transitions

Classification code:801.4 Physical Chemistry - 931.1 Mechanics - 931.4 Quantum Theory; Quantum Mechanics

DOI:10.1140/epjb/e2011-20035-0

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114114415102

Title:Optimization of multiple quantum well structure for GaN-based blue light emitting diode

Authors:Lei, Liang (1); Zeng, Xiang-Hua (1); Fan, Yu-Pei (1); Zhang, Yong (1)

Author affiliation:(1) College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China

Corresponding author:Zeng, X.-H.([e-mail])

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:22

Issue:9

Issue date:September 2011

Publication year:2011

Pages:1326-1331

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:According to the theory of electron tunneling barrier in quantum well structure, the photoelectric properties for GaN-based blue light emitting diodes (LEDs) with different heights, widths of the barrier and quantum well have been simulated by the APSYS software. The calculations of the I-V characteristics, light intensity, internal quantum efficiency at different conditions show that there is a red-shift in the spontaneous emission spectrum. Compared with the conventional quantum well parameters of LED, the optimized LED structures have better photoelectric properties with a voltage reduction of 18.43%, light intensity enhancement of 11.46% and red-shift reduction of 5 nm at a well width of 2 nm, barrier width of 4 nm, In component of 0.08 in barriers, and drive current of 20 mA. The obtained results may be beneficial to the design of the high performance LED.

Number of references:11

Main heading:Semiconductor quantum wells

Controlled terms:Electron tunneling - Emission spectroscopy - Gallium alloys - Gallium nitride - Light emission - Light emitting diodes - Optimization - Photoelectricity - Quantum efficiency - Semiconductor device structures - Spontaneous emission

Uncontrolled terms:APSYS - Barrier widths - Blue light emitting diodes - Different heights - Drive currents - InGaN/GaN - Internal quantum efficiency - IV characteristics - LED structure - Light intensity - Light intensity enhancement - Multiple quantum-well structures - Photoelectric property - Quantum well - Quantum well structures - Red shift - Spectrum intensity - Spontaneous emission spectrum - Voltage reduction - Well width

Classification code:931.4 Quantum Theory; Quantum Mechanics - 921.5 Optimization Techniques - 804.2 Inorganic Compounds - 741.1 Light/Optics - 714.2 Semiconductor Devices and Integrated Circuits - 711 Electromagnetic Waves - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20112214019681

Title:Topological properties of generalized approximation spaces

Authors:Yang, Lingyun (1); Xu, Luoshan (2)

Author affiliation:(1) Department of Mathematics, Xuzhou Normal University, Xuzhou 221116, China; (2) Department of Mathematics, Yangzhou University, Yangzhou 225002, China

Corresponding author:Xu, L.([e-mail])

Source title:Information Sciences

Abbreviated source title:Inf Sci

Volume:181

Issue:17

Issue date:September 1, 2011

Publication year:2011

Pages:3570-3580

Language:English

ISSN:00200255

CODEN:ISIJBC

Document type:Journal article (JA)

Publisher:Elsevier Inc., 360 Park Avenue South, New York, NY 10010, United States

Abstract:Rough set theory is a powerful mathematical tool for dealing with inexact, uncertain or vague information. The core concepts of rough set theory are information systems and approximation operators of approximation spaces. Approximation operators draw close links between rough set theory and topology. This paper concerns generalized approximation spaces via topological methods and studies topological properties of rough sets. Classical separation axioms, compactness and connectedness for topological spaces are extended to generalized approximation spaces. Relationships among separation axioms for generalized approximation spaces and relationships between topological spaces and their induced generalized approximation spaces are investigated. An example is given to illustrate a new approach to recover missing values for incomplete information systems by regularity of generalized approximation spaces. © 2011 Elsevier Inc. All rights reserved.

Number of references:29

Main heading:Rough set theory

Controlled terms:Information systems - Mathematical operators - Topology

Uncontrolled terms:Approximation operators - Approximation spaces - Compactness - Incomplete information systems - Mathematical tools - Missing values - Preorders - Rough set - Topological methods - Topological properties - Topological spaces

Classification code:903.2 Information Dissemination - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1016/j.ins.2011.04.020

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114214445814

Title:Study on extraction-oxidation desulfurization of model oil by acidic ionic liquid

Authors:Zhang, Cun (1); Wang, Feng (1); Pan, Xiao-Yu (1); Liu, Xiao-Qin (2)

Author affiliation:(1) College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; (2) College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

Corresponding author:Zhang, C.([e-mail])

Source title:Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology

Abbreviated source title:Ranliao Huaxue Xuebao J. Fuel Chem. Technol.

Volume:39

Issue:9

Issue date:September 2011

Publication year:2011

Pages:689-693

Language:Chinese

ISSN:02532409

CODEN:RHXUD8

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Acidic ionic liquid N-carboxymethylpyridine hydrosulphate ([CH2COOHPy]HSO4) as the extractant and catalyst, and hydrogen peroxide as the oxidant were used to the extraction-oxidation desulphurization of model oil (dibenzothiophene dissolved in n-octane). The effects of the amounts of hydrogen peroxide and ionic liquid, reaction temperature and reaction time on the sulfur removal were investigated. The results show that when molar ratio of sulfur to H2O2 is 1:6, volume ratio of ionic liquid to model oil is 0.6:10, and reaction time is 40 min at 50°C, the sulfur removal of model oil can reach 99.7%. The ionic liquid can be recycled 5 times without obvious decrease in the sulfur removal.

Number of references:18

Main heading:Ionic liquids

Controlled terms:Hydrodesulfurization - Hydrogen - Hydrogen peroxide - Ions - Oxidation - Sulfur

Uncontrolled terms:Acidic ionic liquids - Desulphurization - Dibenzothiophenes - Extractants - Extraction-oxidation - Molar ratio - N-octanes - Reaction temperature - Volume ratio

Classification code:801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114414481787

Title:Linear transformation between the bending solutions of functionally graded and homogenous circular plats