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Synthesis and Microstructure of Doped Alumina Composite Membrane by Sol-Gel Process

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Journal of Wuhan University of Technology(Materials Science) 2003年第3期18卷 15-19页

作者：徐晓虹 School of Materials Science and Engineering Wuhan University of Technology

The supported membranes of Al 2O 3 and its modification membranes were *** 2O 3,Al 2O 3 SiO 2 TiO 2 and Al 2O 3 SiO 2 TiO 2 ZrO 2 membranes were mamufatured by the slip casting process using mixing boehmite,silicate,titania and zirconia sols under proper conditions,then the composite membrane was *** structure and characteristics of the membrane were determined by XRD,SEM and AFM *** conditions of preparation of the membrane are *** thickness of the layer is about 1-2μm,the diameter of an average pore is 200-300nm and has a narrow pore distribution without crack *** changing the ratios of Al∶Si∶Ti∶Zr(mol),variations of surface pore size of Al 2O 3 SiO 2 TiO 2 ZrO 2 membrane can be gained.

关键词： doped alumina composite membrane sol gel process

Reverse Rotation of Ring-Shaped Perturbation on Homogeneous Bose–Einstein Condensates

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Chinese Physics Letters 2021年第9期38卷 11-17页

作者： Peng Gao Zeyu Wu zhan-ying Yang Wen-Li Yang School of Physics Northwest UniversityXi’an 710127China Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an 710127China Department of Physics and Astronomy University College LondonLondon WC1E 6BTUK Peng Huanwu Center for Fundamental Theory Xi’an 710127China Institute of modern Physics Northwest UniversityXi’an 710127China

We numerically study the dynamics of rotating ring-shaped perturbation on two-dimensional homogeneous Bose–Einstein condensates,where a new ring-shaped structure with reverse rotation *** reversely rotating mode is directly caused by the existence of the plane wave(namely the homogeneous background).By the modified linear stability analysis method,we quantitatively predict the influence of the background’s density on perturbation dynamics,including the velocity,amplitude,and frequency of the two *** construct an approximative solution to describe the short-lived dynamics of initial perturbation,which agrees well with our numerical ***,after the two rings separate,the transfer of atom number between them becomes linear,and the rate of transfer is impacted by the radial momentum of initial perturbation.

关键词： perturbation perturbation Einstein

Vitis amuerensis CBF3 Gene Isolation,Sequence Analysis and Expression

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Agricultural Sciences in China 2010年第8期9卷 1127-1132页

作者： WANG zhan-bin FENG Lian-rong WANG Jin-jie WANG Zhi-ying Northeast Forestry University/Key Labotatory of Forest Tree Genetic Improvement and Biotechnology Ministry of Agricuture Harbin 150040 P.R.China Institute of Poplar of Liaoning Province Gaizhou 115200 P.R. China

The full length cDNA sequence of CBF3 （CRT/DRE-binding factor） was cloned from Vitis amurensis by reverse transcription polymerase chain reaction （RT-PCR） using the primers designed based on CBF genes available in GenBank. Sequence analysis showed that the gene had 854 bp long and its coding sequence contained 720 bp, encoding a protein with 239 amino acids and an AP2 structural domain. The molecular mass of CBF3 was predicted to be 25.9 kDa and its theoretical isoelectric point was 7.02 and aliphatic index was 59.29. The average hydropathicity of the protein was -0.551. The tertiary structures of CBF3 were also analyzed. The prokaryotic expression vector pGEX-4T-CBF3 containing CBF3 gene was constructed and CBF3 fusion protein （52 kDa） was produced in Escherichia coli after induction with 1 mmol L-1 IPTG. Further studies are needed to evaluate its potential application for improving plant resistance to cold and other stress condition such as drought and salinity.

关键词： Vitis amurensis CBF gene cloning sequence analysis expression in prokaryote

Automated String Constraints Solving for Programs Containing String Manipulation Functions

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Journal of Computer Science & Technology 2017年第6期32卷 1125-1135页

作者： Xu-Zhou zhang Yun-zhan Gong Ya-Wen Wang ying Xing Ming-Zhe zhang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Automation School Beijing University of Posts and Telecommunications Beijing 100876 China

The ability to solve various constraints is a principal factor of automatic constraint solvers. Most object-oriented languages treat a character string as a primitive data type which is manipulated by string library functions. Most constraint solvers have limitations on their input constraints, such as strong restrictions on the expressiveness of constraints or lack of the ability to solve hybrid constraints. These limitations hinder applying automated constraint solvers on program analysis techniques for programs containing strings and string manipulation functions. We propose an approach to automatically solve program constraints involving strings and string manipulation functions. Based on the character array model, we design a constraint language which contains primitive operations to precisely describe the constraints of commonly used string manipulation functions. The translated string constraints together with numeric constraints are then solved by a two- phase test generation procedure： firstly, a partial solution is obtained to satisfy the arithmetic constraints of the position variables, and the solution is utilized to simplify the string constraints into pure character array constraints; secondly, the pure array constraints are solved by an off-the-shelf array-specific theory based constraint solver. We integrate the approach into an automated testing tool to support the generation of string test cases, and then perform experiments. The results of the experiments prove that the integration of the proposed approach promotes the testing coverage of the existing testing tool, and the integrated tool has an advantage of handling specific string manipulation functions compared with an existing string solver.

关键词： string constraints solving satisfaction module theory program analysis software testing automated testinput generation

Aerodynamic Characteristics and Noise Collaborative Optimization of an Airfoil

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Wuhan University Journal of Natural Sciences 2020年第3期25卷 238-246页

作者： zhan Zhihuan GU Chaojie xiao Qing CHEN Dongyang Beijing Research Institute of Mechanical&Electrical Technology Beijing 100041China College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou 225127JiangsuChina China Ship Development and Design Center Wuhan 430064HubeiChina

Aerodynamic noise is the main problem restricting its development nowadays in green energy,ocean engineering and aerospace *** order to limit the aerodynamic noise of an airfoil structure,a method is proposed in this paper by designing low noise *** method optimized the aerodynamic noise of two-dimensional airfoil,and considered the aerodynamic performance of the airfoil at the same *** on Joukowski conformal transformation,airfoil geometry is parameterized ***,the optimization model taking the lift-to-drag ratio and airfoil self-noise as the design objective,is established to modify the airfoil by active set algorithm until the airfoil can satisfy the design ***,the noise of the optimized airfoil is verified according to the prediction theory of airfoil ***,the relationship between airfoil geometry and noise is *** results show that the lift-to-drag ratio of the optimized airfoil increased,and the noise also ***,the optimization method can be used to address special design of low-noise ***,the optimization method in this paper can provide reference for improving lift-to-drag ratio and reducing noise of the airfoil in aircraft and submarine rudder system.

关键词： wind turbine blade lift-to-drag ratio aerodynamic noise optimization design of airfoil active set algorithm

Quantized Superfluid Vortex Filaments Induced by the Axial Flow Effect

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Chinese Physics Letters 2020年第3期37卷 5-8页

作者： Hao Li Chong Liu zhan-ying Yang Wen-Li Yang School of Physics Northwest UniversityXi'an 710127 Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi'an 710127 NSFC-SPTP Peng Huanwu Center for Fundamental Theory Xi'an 710127 Institute of Modern Physics Northwest UniversityXi'an 710127

We report the quantized superfluid vortex filaments induced by the axial flow effect,which exhibit intriguing loop structures on helical *** new vortex filaments correspond to a series of soliton excitations including the multipeak soliton,W-shaped soliton,and anti-dark soliton,which have no analogue when the axial flow effect is *** particular,we show that the vortex filaments induced by the multipeak soliton and W-shaped soliton arise from the dual action of bending and twisting of the vortex,while the vortex filament induced by the anti-dark soliton is caused only by the bending action,which is consistent with the case of the standard bright *** results will deepen our understanding of breather-induced vortex filaments and will be helpful for controllable ring-like excitations on vortices.

关键词： soliton vortex bending

Unitary Transformation in kq Representation

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Communications in Theoretical Physics 2009年第7期52卷 103-107页

作者： YANG zhan-ying zhanG Kai HOU Bo-Yu SHI Kang-Jie Department of Physics Northwest University Xi＇an 710069 China Institute of Modern Physics Northwest University Xi＇an 710069 China

In this paper,we discuss the unitary transformation induced by Z_6 rotations of noncommutative space onthe states |k,q,s〉,which plays a key role in construction for noncommutative solitons T^2/Z_6 by GHS *** aresult,... 详细信息

关键词： unitary transformation kq representation

Banded structure control of low carbon microalloyed steel based on oxide metallurgy

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Journal of Iron and Steel Research International 2023年第11期30卷 2242-2253页

作者： Yong-kun Yang Jia-yu Zhu xiao-ming Li Yang Wang Dong-ping zhan School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina

Banded structure is a common harmful microstructure for low carbon microalloyed steel,which seriously shortens the service life of processed *** order to study the effect of oxide metallurgy on improving banded structure,the Ti-Zr deoxidized low carbon microalloyed steel that can play the oxide metallurgical role of inclusion was chosen as the research object,and the inclusion characteristics,microstructure and transverse and longitudinal mechanical properties after hot rolling were *** results showed the inclusion number density increased in all experimental steels after hot rolling,and a large number of long strip inclusions with aspect ratio greater than 3 appeared along the rolling *** addition,after hot rolling,there were element segregation bands in the experimental steels,and granular bainite bands were formed in the element enrichment ***,the intragranular ferrite generated in the cooling process destroyed the continuity of granular bainite bands,so that the microstructure anisotropy indexes of experimental steels were *** mechanical properties analysis showed that the anisotropy of performance was mainly reflected in plasticity and toughness in the experimental *** them,the difference ratio of elongation,section shrinkage and impact energy of No.2 steel was 1.69%,3.87% and 1.69%,respectively,which were less than those of No.1 steel and No.3 *** anisotropy of microstructure and mechanical properties of No.2 steel that full played the role of oxide metallurgy were improved,and the banded structure control of low carbon microalloyed steel can be realized by oxide metallurgy technology.

关键词： Low carbon microalloyed steel Hot rolling Banded structure Oxide metallurgy Intragranular ferrite

DEGRADATION OF ORGANIC POLLUTANTS IN FLOCCULATED LIQUID DIGESTATE USING PHOTOCATALYTIC TITANATE NANOFIBERS: MECHANISM AND RESPONSE SURFACE OPTIMIZATION

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Frontiers of Agricultural Science and Engineering 2023年第3期10卷 492-502页

作者： Yiting xiao Yang TIAN Yuanhang zhan Jun ZHU Department of Biological and Agricultural Engineering University of ArkansasFayettevilleAR 72701USA Material Science and Engineering Programs University of ArkansasFayettevilleAR 72701USA

Titanate nanofibers(TNFs)were synthesized using a hydrothermal method and were employed for the first time in this study to photocatalytically degrade organic pollutants found in flocculated liquid digestate of poultry *** photocatalytic performance of TNFs,with a bandgap of 3.16 eV,was tested based on degradation of organic pollutants and removal of *** combinations of pollutant concentration and pH were examined(0.2 to 1.3 g·L^(−1) at pH 4 to 10).Central composite design(CCD)and response surface methodology(RSM)were applied in order to optimize the removal rates of volatile fatty acids(VFA)and chemical oxygen demand(COD),and the decolorization *** were no significant differences between the regression models generated by the CCD/RSM and the experimental *** was found that the optimal values for pH,dosage,VFA removal rate,COD removal rate and decolorization rate were 6.752,0.767 g·L^(−1),72.9%,59.1%and 66.8%,*** findings indicates that photocatalytic TNFs have potential for the posttreatment of anaerobic digestion effluent,as well as other types of wastewater.

关键词： titanate nanofibers photocatalysis poultry litter liquid digestate