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CTE Solvability,Exact Solutions and Nonlocal Symmetries of the Sharma–Tasso–Olver Equation

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Communications in Theoretical Physics 2015年第12期64卷 623-629页

作者：蒲欢贾曼 Mathematics Department Ningbo University Physics Department and ningbo Collaborative Innovation Center of Nonlinear Hazard System of Ocean and Atmosphere Ningbo University

In this letter,we prove that the STO equation is CTE solvable and obtain the exact solutions of solitons fission and fusion. We also provide the nonlocal symmetries of the STO equation related to CTE. The nonlocal sym... 详细信息

关键词： Sharma–Tasso–Olver equation consistent tanh expans

Preparation and Magnetic Properties of Anisotropic SmCo5/Co Composite Particles

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 143-147页

作者： Lin Lv Feng-Qing Wang Qiang Zheng Juan Du Xian-Lin Dong Ping Cui J.Ping Liu CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Materials and Chemical Engineering Ningbo University of Technology Ningbo 315211 China Department of Physics University of Texas at Arlington Arlington TX 76019 USA University of Chinese Academy of sciences Beijing 100049 China Shanghai Institute of Ceramics CAS Shanghai 200050 China School of Physical science and Technology Shanghai Tech University Shanghai 201210 China

Anisotropic SmCo5/Co nanocomposite powders have been prepared by electroless Co deposition on commercial SmCo5 powders with hydrazine as reducer. The Co particles are mainly in the range of 8–27 nm and form dense/continuous soft magnetic coatings on the surface of SmCo5 powders. Exchange coupling happened between the coated Co soft magnetic particles and the SmCo5 hard phase. As a result, SmCo5/Co nanocomposite powders with remanence of73.58 emu/g and energy product of 13.74 MGOe were obtained in the optimum condition, as compared with those of70.52 emu/g and 13.40 MGOe for uncoated SmCo5 powders. The effects of Co adding amount on Co particle size, coating morphology, and magnetic properties of SmCo5/Co products were investigated.

关键词： Nanocomposite Permanent magnet Coating Nanosize Exchange coupling

Exact Solutions to the Two-Dimensional Spatially Inhomogeneous Cubic-Quintic Nonlinear Schr(o)dinger Equation with an External Potential

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Chinese Physics Letters 2012年第7期29卷 10-13页

作者： CHEN Jun-Chao ZHANG Xiao-Fei LI Biao CHEN Yong Nonlinear science Center Ningbo UniversityNingbo 315211 National Time Service Center Chinese Academy of SciencesXi’an 710600 Institute of Physics Chinese Academy of SciencesBeijing 100190 Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062

We investigate the two-dimensional spatially inhomogeneous cubic-quintic nonlinear Schr(o)digner equation with different external *** the absence of external potential or in the presence of harmonic potential,the number of localized nonlinear waves is associated not only with the boundary condition but also with the singularity of inhomogeneous cubic-quintic nonlinearities;while in the presence of periodic external potential,the periodic inhomogeneous cubic-quintic nonlinearities,together with the boundary condition,support the periodic solutions with an arbitrary number of circular rings in every *** results may stimulate new matter waves in high-dimensional Schr(o)digner equations with spatially modulated nonlinearities.

关键词： inhomogeneous periodic spatially

A Control Method for Congested Traffic in the Car-Following Model

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Chinese Physics Letters 2012年第5期29卷 49-51页

作者： GE Hong-Xia YU Jian LU Zhao-Ming Faculty of science Ningbo UniversityNingbo 315211 Department of Civil and Architectural Engineering City University of Hong KongKowloonHong Kong

A simple control method to suppress traffic congestion is proposed for the car-following *** stability conditions are derived by using the control method,and the feedback signals,which act on our traffic system,are extended to the car-following *** control signals will play an effect only if the traffic is *** corresponding numerical simulation results agree well with our theoretical analysis,and our control method can successfully suppress traffic jams.

关键词： traffic method stability

Air stable Fe nanostructures with high magnetization prepared by reductive annealing

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Journal of Materials science & Technology 2017年第11期33卷 1334-1338页

作者： Yanhua Liu Baoru Bian Chunfeng Hu Pengpeng Yi Juan Du Weixing Xia Jian Zhang Aru Yan Ying Li J.Ping Liu Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology & Engineering Chinese Academy of Sciences Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University School of Materials science and Engineering Shanghai University Department of Physics University of Texas at Arlington

Monodispersed Fe nanospindles and nanoparticles were successfully synthesized through environmentfriendly reductive annealing ？-Fe OOH nanorods. Effects of annealing temperature and reaction atmosphere on microstructure, phase, and magnetic property of Fe nanostructures were *** as-obtained pure Fe nanoparticles with mean size of 45 nm had a high saturation magnetization up to 207 emu/g, close to that of bulk material（218 emu/g）, which exhibited high air stability. After exposing in air for 2 and 7 days, the as synthesized Fe nanoparticles still showed high magnetization of 182 and141 emu/g, respectively.

关键词： Fe nanostructures Microstructure High saturation magnetization High air stability