Wei Zhang

Shanghai University of Engineering Science, Shanghai, Shanghai Shi, China

Are you Wei Zhang?

Claim your profile

Publications (122)83.05 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: A novel 2D supramolecular compound based on the flexible zwitterion and Keggin-type polyoxoanion, formulated [C8H11N2O4]3PMo12O40·2CH3OH·H2O (compound 1) has been synthesized from the reaction mixture of 12-molybdophosphoric acid and the N,N′-diacetic acid imidazolium chloride under room temperature. Compound 1 crystallizes in the P2(1)/n space group of monoclinic system with a = 13.1231(7), b = 26.5393(14), c = 20.0457(11) Å, α = 13.1231(7), V = 6833.7(6) Å3, C26H43Mo12N6O55P, Mr = 2501.91, Dcalc = 2.432 mg/m3, μ = 2.262 mm−1, F(0 0 0) = 4800, Z = 4, R1 = 0.0522 and wR2 = 0.1242. X-ray crystallography shows that, under catalysis of the polyoxometalate anion, one of the carboxyl groups in each zwitterionic molecule is esterified by methanol solvent. The polyoxometalate anions extend to a honeycomb-like inorganic layer via short contact interactions of O⋯O. Compound 1 is employed as a catalytic oxidant to reveal its desulfurization behavior. The result shows that the supramolecular compound exhibits attractive photochromism. In addition, compound 1 retains Keggin molybdate anion’s desulfurization activities with 30 mg compound at 313 K for 15 min.
    Inorganica Chimica Acta. 11/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The new solid acidic ionic liquid polymer (PIL) has been synthesized through the copolymerization of acidic ionic liquid oligomers and divinylbenzene (DVB). Its oxidation activities were investigated through oxidating benzothiophene. The results showed that the PIL was very efficient for oxidating benzothiophene with oxidation capacity reaching 95.5% at 323 K for 20 min.
    RSC Advances 10/2014; · 3.71 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Here, two ionic liquids 1-methyl-3-propane sulfonic-imidazolium (PSMIM) and 1-methyl-3-propane sulfonic-imidazolium hydrosulfate (PSMIMHSO4) are synthesized, and these ionic liquids mixed with different of heteropolyacid Cs2.5H0.5PW12O40 have been used as catalysts for esterification of cooking oil for preparation of biodiesel. Then those catalysts are characterized by Infrared spectrometer, X-ray diffractometer, nuclear magnetic resonance, elemental analyses and high-performance liquid chromatography. PSMIM and PSMIMHSO4 mixed with Cs2.5H0.5PW12O40 at the mass ratio of 1:1 are able to effectively catalyze esterification, using cooking oil as starting material at ratio of 1:20 (catalyst/cooking oil) and cooking oil to methanol at mass ratio of 1:6 for preparation of biodiesel with 3.5 h at 343 K. The result showed that 97.1 % yield of biodiesel could be obtained at optimized operation using PSMIMHSO4 mixed with Cs2.5H0.5PW12O40 at the mass ratio of 1:1 as catalyst.
    Applied Petrochemical Research. 09/2014; 4(3):305-312.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The nanoparticles of amorphous Nickel-Cobalt-Boron alloy powder, prepared by chemical reduction, show superior specific capacitance when used as pseudocapacitor material. The amorphous is investigated by powder X-ray diffractions (PXRD), inductively coupled plasma (ICP) and transmission electron microscope (TEM). The amorphous Nickel-Cobalt-Boron alloy exhibits a noticeable pseudocapacitance with 1310 F g-1 at 1.5 A g-1 in the electrolyte of 6 M KOH. The capacitance of Nickel-Cobalt-Boron retains 70% of its initial value after cycle life of 500 cycles by charging and discharging at a scan rate of 10 mV s-1.
    New Journal of Chemistry 08/2014; · 3.16 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The zeolitic imidazolate framework-8 (ZIF-8), nickel carbonate hydroxide (Ni2CO3(OH)2) and Ni2CO3(OH)2/ZIF-8 composite material are synthesized by a typical solvothermal method. In the Ni2CO3(OH)2/ZIF-8 material, the ZIF-8 acts as the host for the growth of Ni2CO3(OH)2. Their structure and surface morphology are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption–desorption isotherms. The porous structure combined with Ni2CO3(OH)2 maximizes the utilization of active material, resulting in a high specific capacitance. As electrode materials for supercapacitors, the ZIF-8, Ni2CO3(OH)2 and Ni2CO3(OH)2/ZIF-8 electrodes exhibit a specific capacitance of 140, 668 and 851 F g−1 respectively at a scan rate of 5 mV s−1 and good stability over 5000 cycles. In particular, Ni2CO3(OH)2/ZIF-8 is a promising candidate for the supercapacitor electrode.
    RSC Advances 08/2014; 4(68). · 3.71 Impact Factor
  • Junhua Zhang, Wei Zhang, Yuxin Hao
    [Show abstract] [Hide abstract]
    ABSTRACT: The extended Melnikov method is improved to investigate the nonautonomous nonlinear dynamical system in Cartesian coordinate. The multipulse chaotic dynamics of a simply supported functionally graded materials (FGM) rectangular plate subjected to transversal and in-plane excitations is investigated in this paper for the first time. The formulas of the FGM rectangular plate are two-degree-of-freedom nonautonomous nonlinear system with coupling of nonlinear terms including several square and cubic terms. The extended Melnikov method is improved to enable us to analyze directly the nonautonomous nonlinear dynamical system of the simply-supported FGM rectangular plate. The results obtained here indicate that multipulse chaotic motions can occur in the simply-supported FGM rectangular plate. Numerical simulation is also employed to find the multipulse chaotic motions of the simply-supported FGM rectangular plate.
    International Journal of Bifurcation and Chaos 05/2014; 24(05). · 0.92 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, the complicated dynamics and multi-pulse homoclinic orbits of a two-degree-of-freedom parametrically excited nonlinear nano-oscillator with coupled cubic nonlinearities are studied. The damping, parametrical excitation and the nonlinearities are regarded as weak. The averaged equation depicting the fast and slow dynamics is derived through the method of multiple scales. The dynamics near the resonance band is revealed by doing a singular perturbation analysis and combining the extended Melnikov method. We are able to determine the criterion for the existence of the multi-pulse homoclinic orbits which can form the Shilnikov orbits and give rise to chaos. At last, numerical results are also given to illustrate the nonlinear behaviors and chaotic motions in the nonlinear nano-oscillator.
    02/2014;
  • Shuangbao Li, Wei Zhang, Yuxin Hao
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we extend the well-known Melnikov method for smooth systems to a class of periodic perturbed piecewise smooth planar system. We assume that the unperturbed system is a piecewise Hamiltonian system which possesses a piecewise smooth homoclinic solution transversally crossing the switching manifold. The Melnikov-type function is explicitly derived by using the Hamiltonian function to measure the distance of the perturbed stable and unstable manifolds. Finally, we apply the obtained results to study the chaotic dynamics of a concrete piecewise smooth system.
    International Journal of Bifurcation and Chaos 01/2014; 24(02). · 0.92 Impact Factor
  • Minghui Yao, Wei Zhang
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper investigates the multi-pulse global bifurcations and chaotic dynamics of the high-dimension nonlinear system for a laminated composite piezoelectric rectangular plate by using an extended Melnikov method in the resonant case. Using the von Karman type equations, Reddy’s third-order shear deformation plate theory and Hamilton’s principle, the equations of motion are derived for the laminated composite piezoelectric rectangular plate with combined parametric excitations and transverse excitation. Applying the method of multiple scales and Galerkin’s approach to the partial differential governing equation, the four-dimensional averaged equation is obtained for the case of 1:2 internal resonance and primary parametric resonance. From the averaged equations obtained, the theory of normal form is used to derive the explicit expressions of normal form with a double zero and a pair of pure imaginary eigenvalues. Based on the explicit expressions of normal form, the extended Melnikov method is used for the first time to investigate the Shilnikov type multi-pulse homoclinic bifurcations and chaotic dynamics of the laminated composite piezoelectric rectangular plate. The necessary conditions of the existence for the Shilnikov type multi-pulse chaotic dynamics of the laminated composite piezoelectric rectangular plate are analytically obtained. Numerical simulations also illustrate that the Shilnikov type multi-pulse chaotic motions can also occur in the laminated composite piezoelectric rectangular plate. Overall, both theoretical and numerical studies demonstrate that the chaos in the Smale horseshoe sense exists for the laminated composite piezoelectric rectangular plate.
    Meccanica 01/2014; 49(2). · 1.75 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: As techniques develop, the AMBs are more widely utilized in engineering fields than ever before. Their performance depends on the actively control strategies due to their complicated dynamical characteristics, which mainly arise from the electromagnetic forces. Those forces usually are nonlinear functions of the displacements of the rotor and the control current. An understanding of the dynamical characteristics of these structural systems is essential for the rules of their designing and controlling. Variations of a long time could be observed easier with a quicker time scale. In order to study the AMBs’ action during a very long time, we use the perturbation method to obtain the AMBs’ motion up to second-order time scale. In present work, the horizontal and vertical motions of a rotor-AMBs system with 8-pole legs and the time-varying stiffness are formulated. We use the multiple scales method to study the simultaneous resonance of a 1:2 sub-harmonic resonance and a primary parametric resonance for this system up to the second-order time scale. With numerical simulation, we focus on the nonlinear dynamics describing the system’s approximate solution with regard to the second-order time scale. It is found that the modulations of the amplitudes and phases of the rotor-AMBs system in higher time scale could be severely affected by changing some parameters in governing equations.
    ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference; 08/2013
  • Ni Song, Wei Zhang, Qian Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: An appropriate nonlinear mechanism may create the rogue waves. Perhaps the simplest mechanism, which is able to create considerate changes in the wave amplitude, is the nonlinear interaction of shallow-water solitons. The most well-known examples of such structure are Korteweg-de Vries (KdV) solitons. The Korteweg-de Vries (KdV) equation, which describes the shallow water waves, is a basic weakly dispersive and weakly nonlinear model. Basing on the homogeneous balanced method, we achieve the general rational solution of a classical KdV equation. Numerical simulations of the solution allow us to explain rare and unexpected appearance of the rogue waves. We compare the rogue waves with the ones generated by the nonlinear Schrödinger (NLS) equation which can describe deep water wave trains. The numerical results illustrate that the amplitude of the KdV equation is higher than the one of the NLS equation, which may causes more serious damage of engineering structures in the ocean. This nonlinear mechanism will provide a theoretical guidance in the ocean and physics.
    ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference; 08/2013
  • Minghui Yao, Wei Zhang
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper investigates the multipulse global bifurcations and chaotic dynamics for the nonlinear oscillations of the laminated composite piezoelectric rectangular plate by using an energy phase method in the resonant case. Using the von Karman type equations, Reddy’s third-order shear deformation plate theory, and Hamilton’s principle, the equations of motion are derived for the laminated composite piezoelectric rectangular plate with combined parametric excitations and transverse excitation. Applying the method of multiple scales and Galerkin’s approach to the partial differential governing equation, the four-dimensional averaged equation is obtained for the case of 1 : 2 internal resonance and primary parametric resonance. The energy phase method is used for the first time to investigate the Shilnikov type multipulse heteroclinic bifurcations and chaotic dynamics of the laminated composite piezoelectric rectangular plate. The paper demonstrates how to employ the energy phase method to analyze the Shilnikov type multipulse heteroclinic bifurcations and chaotic dynamics of high-dimensional nonlinear systems in engineering applications. Numerical simulations show that for the nonlinear oscillations of the laminated composite piezoelectric rectangular plate, the Shilnikov type multipulse chaotic motions can occur. Overall, both theoretical and numerical studies suggest that chaos for the Smale horseshoe sense in motion exists.
    Discrete Dynamics in Nature and Society 08/2013; 2013. · 0.82 Impact Factor
  • Scientia Sinica Physica, Mechanica & Astronomica. 01/2013; 43(4):345-.
  • Source
    Minghui Yao, Wei Zhang, Jean W. Zu
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper investigates the multi-pulse global heteroclinic bifurcations and chaotic dynamics for nonlinear, nonplanar oscillations of the parametrically excited viscoelastic moving belts by using an extended Melnikov method in the resonant case. Applying the method of multiple scales, the Galerkin's approach and the theory of normal form, the explicit normal form is obtained for the case of 1:1 internal resonance and primary parametric resonance. Studies are performed for the heteroclinic bifurcations of the unperturbed system and for the characteristics of the hyperbolic dynamics of the dissipative system, respectively. The extended Melnikov method is used to investigate the Shilnikov type multi-pulse bifurcations and chaotic dynamics of the viscoelastic moving belt. Based on the investigation, the geometric structure of the multi-pulse orbits is described in the four-dimensional phase space. Numerical simulations show that the Shilnikov type multi-pulse chaotic motions can occur. Furthermore, numerical simulations lead to the discovery of the new shapes of chaotic motion. Overall, both theoretical and numerical studies suggest that chaos for the Smale horseshoe sense in motion exists.
    International Journal of Bifurcation and Chaos 01/2013; 23(01):50001-. · 0.92 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, the bifurcations of subharmonic orbits for a four-dimensional rectangular thin plate with parametrically and externally excitations is considered for the first time. The formulas of the rectangular thin plate are derived by using the von Karman-type equation, the Reddy’s third-order shear deformation plate theory and the Galerkin’s approach. The unperturbed system is composed of two independent planar Hamiltonian systems such that the unperturbed system has a family of periodic orbits. The problem addressed here is the determination of sufficient conditions for some of the periodic orbits to generate subharmonic orbits after periodic perturbations. Thus, based on periodic transformations and Poincaré map the subharmonic Melnikov method is improved to enable us to analyze directly the non-autonomous nonlinear dynamical system, which is applied to the non-autonomous governing equations of motion for the parametrically and externally excited rectangular thin plate. The results obtained here indicate that subharmonic motions can occur in the rectangular thin plate. The method succeeds in establishing the existence of subharmonics in perturbed Hamiltonian systems as well as in discussing their bifurcations. Numerical simulation is also employed to find the subharmonic motions of the parametrically and externally excited rectangular thin plate.
    ASME 2012 International Mechanical Engineering Congress and Exposition; 11/2012
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, the nonlinear vibration of a thin-plate workpiece during milling process is investigated. The thin-plate workpiece is modeling as a cantilevered thin plate. The equations of motion for the thin-plate workpiece are derived based on the Kirchhoff-plate theory and the von Karman strain-displacement relations by using the Hamilton’s principle. By applying the Galerkin’s approach, the resulting equations are reduced to a two-degree-of-freedom nonlinear system with external excitations. Considering the case of 1:1 internal resonance, the method of Asymptotic Perturbation method is utilized to obtain the averaged equations of the cantilevered thin-plate workpiece. Numerical method is used to study nonlinear dynamics of the cantilevered thin plate and get the two-dimensional phase portraits, waveforms phase, three-dimensional phase and frequency spectrum phase. The result shows that the cantilevered thin-plate workpiece exhibits the complex dynamic behavior with the increase of the amplitude of the forcing excitation.
    ASME 2012 International Mechanical Engineering Congress and Exposition; 11/2012
  • [Show abstract] [Hide abstract]
    ABSTRACT: In order to compare nonlinear vibration response of the different enabled materials in the matrix of composites, the nonlinear vibrations of a composite plate reinforced with carbon nanotubes (CNT) are studied. In this paper, the carbon nanotubes are supposed to be long fibers. The nonlinear governing partial differential equations of motion for the composite rectangular thin plate are derived by using the Reddy’s third-order shear deformation plate theory, the von Karman type equation and the Hamilton’s principle. Then, the governing equations get reduced to ordinary differential equations in thickness direction with variable coefficients and these are solved by the Galerkin method. The case of 1:1 internal resonance is considered. The asymptotic perturbation method is employed to obtain the four-dimensional averaged equations. The numerical method is used to investigate the periodic and chaotic motions of the composite rectangular thin plate reinforced with carbon nanotubes. The results of numerical simulation demonstrate that there exist different kinds of periodic and chaotic motions of the composite plate under certain conditions. At last, the nonlinear vibration responses of the plate are compared with the same responses of angle-ply composite laminated plates.
    ASME 2012 International Mechanical Engineering Congress and Exposition; 11/2012
  • [Show abstract] [Hide abstract]
    ABSTRACT: The nonlinear trends of composite laminated plates are investigated. The governing equations of motion for the plate are derived with the von Karman strain-displacement relations for the geometric nonlinearity and the Reddy’s third-order shear deformation plate theory. The four dimensional nonlinear averaged equations with the case of 1/2-subharmonic resonance and principal parametric resonance for the first mode and primary resonance for the second mode are obtained by applying the method of multiple scales. The frequency-response curves are analyzed under consideration of strongly coupled of two modes. The influences of the coefficients in dynamic equations and the detuning parameters on the nonlinear trend are studied, and the results indicate that the composite laminated plate may have different trends of nonlinearity under aforementioned resonance conditions. The sweep experiment is conducted to find the softening and hardening nonlinearity. The different trends are obtained when the excitation amplitude is 1.2g. The spectrums of the different stages of the test show that the change of the nonlinear trend may be caused from the sub-harmonic resonance in this test.
    ASME 2012 International Mechanical Engineering Congress and Exposition; 11/2012
  • [Show abstract] [Hide abstract]
    ABSTRACT: According to the Reddy’s high-order shear deformation theory and the von-Karman type equations for the geometric nonlinearity, the chaos and bifurcation of a composite laminated cantilever rectangular plate subjected to the in-plane and moment excitations are investigated with the case of 1:2 internal resonance. A new expression of displacement functions which can satisfy the cantilever plate boundary conditions are used to make the nonlinear partial differential governing equations of motion discretized into a two-degree-of-freedom nonlinear system under combined parametric and forcing excitations, representing the evolution of the amplitudes and phases exhibiting complex dynamics. The results of numerical simulation demonstrate that there exist the periodic and chaotic motions of the composite laminated cantilever rectangular plate. Finally, the influence of the forcing excitations on the bifurcations and chaotic behaviors of the system is investigated numerically.
    ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference; 08/2012
  • Wei Zhang, Shufeng Lu
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper focus on the nonlinear numerical analysis for an extruding cantilever laminated composite plates subjected to transversal and in-plane excitation. Based on the Reddy’s shear deformable plate theory, the nonlinear partial differential equations of motion were established by using the Hamilton Principal. And then, after choosing suitable vibration mode-shape functions, the Galerkin method was used to reduce the governing partial differential equations to a two-degree-of-freedom nonlinear ordinary differential equation. Finally, we numerical solved the nonlinear ordinary differential equation, and analyzed the influences of varying extruding speeds and thickness of plates on the stability of the plates.
    ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference; 08/2012

Publication Stats

334 Citations
83.05 Total Impact Points

Institutions

  • 2014
    • Shanghai University of Engineering Science
      Shanghai, Shanghai Shi, China
  • 2002–2014
    • Beijing University of Technology
      Peping, Beijing, China
    • Tsinghua University
      Peping, Beijing, China
  • 1999–2010
    • Wayne State University
      • Department of Chemistry
      Detroit, Michigan, United States
  • 2004–2009
    • University of Toronto
      • Department of Mechanical and Industrial Engineering
      Toronto, Ontario, Canada
    • The Ohio State University
      • Department of Chemistry and Biochemistry
      Columbus, OH, United States
  • 2008
    • Shanghai University of Traditional Chinese Medicine
      • Institute of Liver Diseases
      Shanghai, Shanghai Shi, China
  • 2005–2006
    • Fuzhou University
      Min-hou, Fujian, China
  • 2004–2005
    • Peking University
      • School of Pharmaceutical Sciences
      Beijing, Beijing Shi, China