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

Authors:Li, Shirong (1); Zhang, Jinghua (2); Xu, Hua (1)

Author affiliation:(1) College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China; (2) School of Science, Lanzhou University of Technology, Lanzhou 730050, China

Corresponding author:Li, S.([e-mail])

Source title:Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics

Abbreviated source title:Lixue Xuebao

Volume:43

Issue:5

Issue date:September 2011

Publication year:2011

Pages:871-877

Language:Chinese

ISSN:04591879

CODEN:LHHPAE

Document type:Journal article (JA)

Publisher:Chinese Journal of Theoretical and Applied, 15 Beisihuan Xilu, Beijing, 100080, China

Abstract:Based on the first-order shear deformation theory (FSDT), linear transformation relationship between bending solutions of functionally graded material (FGM) and homogenous circular plates was studied. Firstly, through theoretically analyzing and comparing the displacement-type governing equations for axially symmetrically bending of FGM and homogenous circular plates based on the first-order shear deformation theory, linearly dependent relationship between the rotational angles of FGM circular plate and those of homogenous one was found. By giving the material properties of FGM circular plates changing as continuous functions in the thickness direction, the corresponding transition factor between the solutions of the two kind plates were derived in analytical forms. Furthermore, a linear relationship between the deflections of FGM circular plate based on FSDT and those of homogenous one based on the classical plate theory were derived. As a result, solutions for static bending based on the first-order shear deformation plate theory of a non-homogenous circular plate can be reduced to that based on classical plate theory of a homogenous one and the calculation of the transformation factors. This approach provides a simple and facile procedure for solutions of the non-homogenous moderately thick FGM circular plates, which can be very easily and conveniently used in engineering. By using the above mentioned approach, analytical bending solutions of FGM circular plates with simply supported as well as clamped boundary conditions under uniformly distributed lateral force were presented, which show a very good agreement with the results given by Reddy.

Number of references:23

Main heading:Linear transformations

Controlled terms:Beams and girders - Bending (deformation) - Functionally graded materials - Linear equations - Mathematical transformations - Plates (structural components) - Shear deformation

Uncontrolled terms:Circular plates - Classical plate theory - Continuous functions - Dependent relationship - Facile procedure - First-order - First-order shear deformation - First-order shear deformation theory - Functionally graded - Governing equations - Lateral force - Linear relationships - Material property - Moderately thick - Rotational angle - Simply supported - Static bending - Thickness direction

Classification code:408.2 Structural Members and Shapes - 415 Metals, Plastics, Wood and Other Structural Materials - 421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 921 Mathematics - 921.3 Mathematical Transformations

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114214431824

Title:Effect of earthworm bio-bed treatment on properties of cow manure

Authors:Zhao, Haitao (1); Di, Lin (1); Liu, Ping (1); Xu, Yiqun (1); Wang, Xiaozhi (1); Shan, Yuhua (1); Feng, Ke (1)

Author affiliation:(1) Yangzhou Technical Service Center for Agro Environment Safety of Jiangsu Province, Yangzhou 225127, China; (2) College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China

Corresponding author:Feng, K.([e-mail])

Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

Abbreviated source title:Nongye Gongcheng Xuebao

Volume:27

Issue:9

Issue date:September 2011

Publication year:2011

Pages:255-259

Language:Chinese

ISSN:10026819

CODEN:NGOXEO

Document type:Journal article (JA)

Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, China

Abstract:Using earthworms for the treatment of organic solid wastes has more advantages than conventional techniques and aroused extensive attention. In this study, cow manure was treated by earthworm bio-bed, and then changes of physicochemical and biological properties of cow manure before and after the treatment were investigated based on laboratory measurements. The results showed that cow manure after the earthworm bio-bed treatment had advantages of better water and air penetrating properties, easy drying and no order. Both water content and electrical conductivity in cow manure significantly decreased, and pH tended to be neutral. The earthworm bio-bed treatment reduced total nitrogen and organic matter content but elevated ammonium and nitrate content in the manure. Total potassium and total phosphorus, including the fractions of organic phosphorus, inorganic phosphorus and available phosphorus in treated manure increased while available potassium decreased. Humic acid content had no significant changes. The removal efficiency of Cr, Cd and Cu by the treatment was better than that of Pb, Mn, Zn and Fe. The treatment process enriched microbial flora, increased catalase activity and reduced urease activity in vermicompost. In addition, the carbohydrates in the cow manure gradually decomposed and changed to humic substances, while water-soluble organic silicon compounds were converted into inorganic silicon oxides during the earthworm bio-bed treatment.

Number of references:25

Main heading:Chemicals removal (water treatment)

Controlled terms:Ammonium compounds - Biological materials - Carbohydrates - Electric conductivity - Lead - Manganese - Manures - Organic acids - Phosphorus - Potassium - Silicon compounds - Silicon oxides - Water content

Uncontrolled terms:Available phosphorus - Biological properties - Catalase activity - Conventional techniques - Cow manure - Earthworm bio-bed - Electrical conductivity - Humic acid - Humic substances - Inorganic phosphorus - Laboratory measurements - Microbial flora - Organic matter content - Organic phosphorus - Organic solid wastes - Physicochemical property - Removal efficiencies - Total nitrogen - Total phosphorus - Treatment process - Urease activity - Vermicomposts

Classification code:804.1 Organic Compounds - 804 Chemical Products Generally - 701.1 Electricity: Basic Concepts and Phenomena - 549.1 Alkali Metals - 546.1 Lead and Alloys - 543.2 Manganese and Alloys - 461.2 Biological Materials and Tissue Engineering - 452.3 Industrial Wastes - 444 Water Resources

DOI:10.3969/j.issn.1002-6819.2011.09.044

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114514493985

Title:A modified Green-Ampt model for water infiltration in layered soils with air entrapment and its experimental validation

Authors:Ma, Ying (1); Feng, Shao-Yuan (2); Liu, Xiao-Dong (4); Su, Dong-Yuan (5)

Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; (2) China Agricultural University, Beijing 100083, China; (3) Yangzhou University, Yangzhou 225009, China; (4) Water Authority of Haidian District, Beijing 100089, China; (5) Guangxi Institute of Water Resources Research, Nanning 530023, China

Corresponding author:Feng, S.-Y.([e-mail])

Source title:Shuili Xuebao/Journal of Hydraulic Engineering

Abbreviated source title:Shuili Xuebao

Volume:42

Issue:9

Issue date:September 2011

Publication year:2011

Pages:1034-1043

Language:Chinese

ISSN:05599350

CODEN:SLHPBI

Document type:Journal article (JA)

Publisher:China Water Power Press, no. 1 Xikang Road, Nanjing, 210024, China

Abstract:A modified Green-Ampt model (MGAM) was proposed in this study to simulate water infiltration in layered soils with entrapped air. A saturation coefficient Sa (less than 1) was introduced in MGAM to account for the effect of air entrapment on infiltration. The Sa could be approximately determined from soil physical properties. Infiltration experiments in a laboratory layered soil column and field layered soil profile were conducted to test the applicability of MGAM. For comparison, the infiltration process was also simulated by the traditional Green-Ampt model (TGAM) and the Bouwer Green-Ampt model (BGAM). The estimated Sa values by these model were very close to the measured saturation degree of soil layers at the termination of experiment. The simulation results indicate that the TGAM significantly overestimated the infiltration rate and cumulative infiltration, whereas the BGAM considerably underestimated the infiltration rate and cumulative infiltration. Furthermore, the depths of wetting front simulated by TGAM and BGAM were considerably smaller than the measured values. The comparison result shows that, the MGAM provided satisfactory simulation results, and it adequately described the infiltration process in both the laboratory soil column and field soil profile.

Number of references:19

Main heading:Geologic models

Controlled terms:Computer simulation - Experiments - Seepage - Soil mechanics - Soil testing - Soils

Uncontrolled terms:Air entrapment - Experimental validation - Green-Ampt model - Layered soils - Water infiltration

Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 441 Dams and Reservoirs; Hydro Development - 481.1 Geology - 483.1 Soils and Soil Mechanics - 723.5 Computer Applications - 901.3 Engineering Research

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514628

Title:Degradation of 2, 4-DCP by immobilized laccase on mesoporous silica

Authors:Yang, Yuxiang (1); Zhang, Yani (1); Shao, Jianguo (2); Chen, Yaru (1)

Author affiliation:(1) College of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; (2) College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

Corresponding author:Yang, Y.([e-mail])

Source title:Tongji Daxue Xuebao/Journal of Tongji University

Abbreviated source title:Tongji Daxue Xuebao

Volume:39

Issue:9

Issue date:September 2011

Publication year:2011

Pages:1324-1328+1393

Language:Chinese

ISSN:0253374X

CODEN:TTHPDJ

Document type:Journal article (JA)

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

Abstract:Laccase was immobilized on M-NH2-SiO2 with glutaraldehyde as crosslinking agent. The effects on the activity of immobilized laccase, such as concentration of 2, 4-DCP (2, 4-dichlorophenols), acidity of solution, temperature were studied. The results show when concentration of 2, 4-DCP is 5 mg·L^-1, pH of solution is 5.5, and the temperature is at 30°C, the highest removal rate of 2, 4-DCP is 42.28%. The results show that the optimal pH for immobilized laccase is higher than the best pH for free enzyme. Compared with the free enzyme, its stability and repetition are considerably improved.

Number of references:13

Main heading:Degradation

Controlled terms:Aldehydes - Enzymes - Silica - Silicon compounds

Uncontrolled terms:2 ,4-DCP - Cross linking agents - Degradation rate - Free enzyme - Glutaraldehydes - Immobilized laccase - Laccases - Mesoporous - Mesoporous Silica - Removal rate - Repetition

Classification code:802.2 Chemical Reactions - 804.1 Organic Compounds - 812 Ceramics, Refractories and Glass

DOI:10.3969/j.issn.0253-374x.2011.09.013

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114214442462

Title:Evaluation of collapse resistance of RC frame structures for Chinese schools in seismic design categories B and C

Authors:Tang, Baoxin (1); Lu, Xinzheng (2); Ye, Lieping (2); Shi, Wei (2)

Author affiliation:(1) Department of Civil Engineering, Yangzhou University, Yangzhou 225009, China; (2) Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China

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

Source title:Earthquake Engineering and Engineering Vibration

Abbreviated source title:Earthqu. Eng. Eng. Vib. (Harbin)

Volume:10

Issue:3

Issue date:September 2011

Publication year:2011

Pages:369-377

Language:English

ISSN:16713664

Document type:Journal article (JA)

Publisher:Institute of Engineering Mechanics (IEM), 9 Xeufu Road, Harbin, 150080, China

Abstract:According to the Code for Seismic Design of Buildings (GB50011-2001), ten typical reinforced concrete (RC) frame structures, used as school classroom buildings, are designed with different seismic fortification intensities (SFIs) (SFI=6 to 8. 5) and different seismic design categories (SDCs) (SDC=B and C). The collapse resistance of the frames with SDC=B and C in terms of collapse fragility curves are quantitatively evaluated and compared via incremental dynamic analysis (IDA). The results show that the collapse resistance of structures should be evaluated based on both the absolute seismic resistance and the corresponding design seismic intensity. For the frames with SFI from 6 to 7. 5, because they have relatively low absolute seismic resistance, their collapse resistance is insufficient even when their corresponding SDCs are upgraded from B to C. Thus, further measures are needed to enhance these structures, and some suggestions are proposed. © 2011 Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag Berlin Heidelberg.

Number of references:22

Main heading:Seismic design

Controlled terms:Design - Dynamic analysis - Reinforced concrete - Seismology - Structural frames - Teaching

Uncontrolled terms:Collapse resistance - Fragility curves - Incremental dynamic analysis - mega-earthquake - RC frame structures - Seismic fortification intensity

Classification code:408 Structural Design - 408.2 Structural Members and Shapes - 412 Concrete - 422.2 Strength of Building Materials : Test Methods - 484.1 Earthquake Measurements and Analysis - 901.2 Education

DOI:10.1007/s11803-011-0073-1

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114214445241

Title:Antifatigue mechanism of cold-extruded internal thread based on high-strength steel

Authors:Miao, Hong (1); Zuo, Dun-Wen (2); Zhang, Rui-Hong (1); Wang, Min (2); Wang, Shu-Hong (3)

Author affiliation:(1) College of Mechanical Engineering, Yangzhou University, Yangzhou 225000, China; (2) Mechanical Engineering Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (3) Office of the Military Representatives from PLA to No.511 Factory, Nanjing 210016, China

Corresponding author:Miao, H.

Source title:Gongneng Cailiao/Journal of Functional Materials

Abbreviated source title:Gongneng Cailiao

Volume:42

Issue:9

Issue date:September 2011

Publication year:2011

Pages:1547-1550

Language:Chinese

ISSN:10019731

CODEN:GOCAEA

Document type:Journal article (JA)

Publisher:Journal of Functional Materials, P.O. Box 1512, Chongqing, 630700, China

Abstract:According to the forming process of cold-extruded internal thread of high-strength steel, the effect of parts status on the fatigue properties of internal thread was studied from the microscopic viewpoint, such as residual stress, surface roughness, microhardness, hardened layer, etc. The results showed that the metal surface of cold-extruded internal thread had a long fibrous structure, and it appeared to be streamline type and distributed along the normal direction of the tooth surface. The grains were pressed and refined, and the dislocation density was increased significantly. The work hardening phenomenon was appeared, and made the strength and the hardness of the metal increase. The residual compressive stress field formed on the surface of the metal could eliminate the impact of stress concentration, reducing fatigue notch sensitive, extending period of crack forming and slowing or restraining the expanding of the crack. The surface of cold-extruded internal thread had obvious finish mark, and its smooth of the surface was well. The surface roughness could be eliminated effectively, and reducing stress concentration and contributing to increasing the fatigue properties of internal thread.

Number of references:10

Main heading:High strength steel

Controlled terms:Cracks - Hardness - Normal distribution - Residual stresses - Strain hardening - Stress concentration - Surface properties - Surface roughness

Uncontrolled terms:Anti-fatigue - Cold extrusion - Dislocation densities - Fatigue notch - Fatigue properties - Fibrous structures - Forming process - Hardened layers - Internal threads - Metal surfaces - Microscopic viewpoint - Normal direction - Residual compressive stress - Tooth surface

Classification code:421 Strength of Building Materials; Mechanical Properties - 537.1 Heat Treatment Processes - 545.3 Steel - 922.1 Probability Theory - 931.2 Physical Properties of Gases, Liquids and Solids

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114414472215

Title:Mechanism and microstructure of nickel-ceria composite coatings prepared by pulse current deposition under the ultrasonic field

Authors:Zhou, Xiaowei (1); Shen, Yifu (1); Zheng, Yingying (1); Jin, Huiming (2)

Author affiliation:(1) College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (2) College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

Corresponding author:Shen, Y.([e-mail])

Source title:Journal of Rare Earths

Abbreviated source title:J Rare Earth

Volume:29

Issue:9

Issue date:September 2011

Publication year:2011

Pages:883-887

Language:English

ISSN:10020721

CODEN:JREAE6

Document type:Journal article (JA)

Publisher:Chinese Rare Earth Society, 2 Xinjiekouwai Dajie, Beijing, 100088, China

Abstract:In recent research, a novel method combined with pulse current (PC) deposition and the ultrasonic (U) field was used to fabricate pure nickel and nickel-ceria composite coatings, respectively. Morphology, crack propagation, and crystal texture were observed and analysed by using environment scanning electron microscopy (E-SEM) and transmission electron microscopy (TEM). Orthogonal experiment [L16 (4⁵)] was designed to optimize the parameters of pulsed power and the appropriate amount of RE addition based on microhardness. Effect of RE addition and pulsed current on the mechanism of co-electrodeposition was also investigated and compared. Experimental results indicated that it produced the alloying coatings, exhibiting compact grain and amorphous state. Nano-sized RE would preferentially occupy and pad at the edge of cracked gaps and micropore to limit the growing location and space for coarse Ni grain. Furthermore, during annealing at 480 °C for 2 h, a solid-solution precipitated phase named NiCexO1-x (0<x<0.5) dispersed along the large crystal boundary, which would make RE diffused sufficiently to improve crack propagation resistance and promote densification efficiently. © 2011 The Chinese Society of Rare Earths.

Number of references:13

Main heading:Composite coatings

Controlled terms:Cerium compounds - Coatings - Crack propagation - Cracks - Crystal microstructure - Experiments - Nickel - Nickel coatings - Scanning electron microscopy - Transmission electron microscopy - Ultrasonics

Uncontrolled terms:Amorphous state - Co-electrodeposition - Crack propagation resistance - Crystal texture - Environment scanning electron microscopies - Large crystal - Micropores - Nano-sized - nickel-ceria - Novel methods - Orthogonal experiment - Precipitated phase - Pulse currents - Pulsed currents - Pulsed-power - RE additions - ultrasonic field

Classification code:933.1.1 Crystal Lattice - 901.3 Engineering Research - 813.2 Coating Materials - 804.1 Organic Compounds - 753.1 Ultrasonic Waves - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 548.1 Nickel - 421 Strength of Building Materials; Mechanical Properties

DOI:10.1016/S1002-0721(10)60560-1

Database:Compendex

Compilation and indexing terms, Copyright 2011 Elsevier Inc.

Accession number:20114614514936

Title:Development and numerical analysis of new type shaft tubular pumping system

Authors:Zhu, Honggeng (1); Dai, Longyang (2); Zhang, Rentian (1); Zhu, Guoxian (4); Lü, Saijun (2); Fei, Hairong (2)

Author affiliation:(1) College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; (2) Yancheng Surveying and Design Institute of Water Resources, Yancheng, Jiangsu 224002, China; (3) Jiangsu Surveying and Design Institute of Water Resources Co. Ltd., Yangzhou, Jiangsu 225009, China; (4) Yancheng Water Project Administration Department, Yancheng, Jiangsu 224002, China

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

Source title:Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering

Abbreviated source title:Paiguan Jixie Xuebao.

Volume:29

Issue:5

Issue date:September 2011

Publication year:2011

Pages:418-422

Language:Chinese

ISSN:16748530

CODEN:PAJIE2

Document type:Journal article (JA)

Publisher:Editorial Department of Drainage and, 30 Mengxiyuan Lane, Zhenjiang, 212003, China

Abstract:Based on comparing structural features of different tubular pumping systems and technical characteristics of cut off devices in common use, aiming at the characteristics of low head, shorter annual operation time and higher safety and reliability requirements of city flood control pumping stations, a new type shaft tubular pumping system was invented, which is composed of a shaft suction box, a tubular pump and a siphon type discharge passage with a vacuum breaker valve as cutoff device. Taking a real pumping station in Yancheng city as an example, the computational fluid dynamics method was adopted to analyze the internal flow of the new type model tubular pumping system and predict its energy performances. The time averaged Navier-Storks equations were closed by RNG k-Ε turbulent model to adapt internal flow of siphon type discharge passage with larger curvatures. The method of multi-reference frame(MRF) was used to deal with the coupling of rotating impeller and static guide vane, and SIMPLEC algorithm was adopted to achieve the coupling solution of velocity and pressure. Computational results show that the internal flow of the new type shaft tubular pumping system through preliminary optimization is smooth, and the model pumping system efficiency reaches 56.0% when the design head and the relevant discharge are 1.15 m and 0.326 m³/s respectively, and up to 68.8% when the maximum head and the relevant discharge are 1.95 m and 0.296 m³/s respectively.