Minzhi Wei

Sichuan University

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Co-Authors

Yanfei Dai

Zhejiang Normal University

Liping He

Sichuan University

Xingwu Chen

Sichuan University

Hongying Zhu

Guangxi University of Finance and Economics

Shengqiang Tang

Guilin University of Electronic Technology

Junning Cai

Guangxi University of Finance and Economics

Feiting Fan

Civil Aviation Flight University of China

Junning Cai

Guangxi University of Finance and Economics

Xianbo Sun

Minzu University of China

Junning Cai

Food and Agriculture Organization of the United Nations

Cooperative Institutions

Guangxi University of Finance and Economics

Guilin University of Electronic Technology

Guilin University

Guangxi University

Zhejiang Normal University

Sichuan University

University of Hawaiʻi at Mānoa

University of Hawaii System

South China University of Technology

Hechi University

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Traveling wave solutions for a Gardner equation with distributed delay under KS perturbation

Nonlinear Dynamics (2024)

Minzhi Wei Xingwu Chen

10.1007/s11071-024-10627-6

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Determination of 3-methyl-quinoxaline-2-carboxylic acid residue in pork by high performance liquid chromatography-tandem mass spectrometry

Chinese Journal of Chromatography (2019)

Minzhi Wei Jianchun Wan Fusheng Zhang Pan Hua

A method was developed for the simultaneous quantitative and confirmatory determination of 3-methylquinoxaline-2-carboxylic acid (MQCA) residues in pork by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The sample was hydrolyzed with 0.3 mol/L hydrochloric acid solution, and MQCA was extracted by water bath oscillation. MQCA was first extracted with acetonitrile and ethyl acetate and then re-extracted from the extraction solution with 0.1 mol/L sodium hydroxide solution. Then MQCA was purified by an anion exchange solid phase extraction column. The chromatographic separation was performed using an Agilent Eclipse Plus C18 column (50 mm×3.0 mm, 1.8 μm). The quantitative analysis was performed by the matrix matching addition method. The correlation coefficient of MQCA in the range of 1.0-50 μg/L was greater than 0.99. The recovery was 90.5%-119.6% at the spiked levels of 0.5, 1.0 and 5.0 μg/kg, and the relative standard deviation was 3.14%-4.22%. The method can be used for the rapid quantitative determination of 3-methylquinoxaline-2-carboxylic acid residues in pork.

Hydrochloric acid

10.3724/sp.j.1123.2019.04050

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Existence of traveling wave front for a generalized reaction-convection-diffusion equation

Authorea (Authorea) (2022)

Minzhi Wei Yanfei Dai

In presented paper, the existence of traveling wave front for a generalized reaction-convection-diffusion equation with different delay convolution kernels is investigated by using the geometric singular perturbation theory. Firstly, we shall show that such traveling wave front exists without delay by qualitative analysis. After that, for the generalized reaction-convection-diffusion equation with a special local strong delay convolution kernel, the desired heteroclinic orbit is obtained by constructing a locally invariant manifold. Finally, with a nonlocal weak generic delay, the existence of traveling wave front is proved by implicit function theorem and Fredholm theory.

Convection–diffusion equation

Implicit function theorem

Reaction–diffusion system

10.22541/au.167230290.08121652/v1

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EXACT EXPLICIT TRAVELING WAVE SOLUTIONS FOR A NEW COUPLED ZK SYSTEM

Journal of Applied Analysis & Computation (2011)

Minzhi Wei Shengqiang Tang

The extended tanh-coth method and sech method are used to construct exact solutions of a new coupled ZK system. Traveling wave solutions are determined, which include solitary wave and periodic wave solutions.

Periodic wave

10.11948/2011018

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BIFURCATIONS OF TRAVELING WAVE SOLUTIONS FOR A GENERALIZED CAMASSA-HOLM EQUATION

Journal of Applied Analysis & Computation (2018)

Minzhi Wei Xianbo Sun Hongying Zhu

In this paper, the traveling wave solutions for a generalized CamassaHolm equation u_t-u_xxt=1/2 (p+1)(p+2)u^pu_x-1/2p(p-1)u^p-2u_x³-2pu^p-1u_xu_xx-u^pu_xxx are investigated. By using the bifurcation method of dynamical systems, three major results for this equation are highlighted. First, there are one or two singular straight lines in the two-dimensional system under some different conditions. Second, all the bifurcations of the generalized CamassaHolm equation are given for p either positive or negative integer. Third, we prove that the corresponding traveling wave system of this equation possesses peakon, smooth solitary wave solution, kink and anti-kink wave solution, and periodic wave solutions.

Camassa–Holm Equation

10.11948/2018.1851

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Bifurcations of Traveling Wave Solutions for a Modified Novikov’s Cubic Equation

Qualitative Theory of Dynamical Systems (2018)

Minzhi Wei

Novikov self-consistency principle

Periodic wave

10.1007/s12346-018-0306-z

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Existence of traveling waves in a delayed convecting shallow water fluid model

Electronic Research Archive (2023)

Minzhi Wei

<abstract><p>This paper investigates a delayed shallow water fluid model that has not been studied in previous literature. Applying geometric singular perturbation theory, we prove the existence of traveling wave solutions for the model with a nonlocal weak delay kernel and local strong delay convolution kernel, respectively. When the convection term contains a nonlocal weak generic delay kernel, the desired heteroclinic orbit is obtained by using Fredholm theory and linear chain trick to prove the existence of two kink wave solutions under certain parametric conditions. When the model contains local strong delay convolution kernel and weak backward diffusion, under the same parametric conditions to the previous case, the corresponding traveling wave system can be reduced to a near-Hamiltonian system. The existence of a unique periodic wave solution is established by proving the uniqueness of zero of the Melnikov function. Uniqueness is proved by utilizing the monotonicity of the ratio of two Abelian integrals.</p></abstract>

Kernel (algebra)

10.3934/era.2023343

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Periodic Peakon and Smooth Periodic Solutions for KP-MEW(3,2) Equation

Advances in Mathematical Physics (2021)

Junning Cai Minzhi Wei Liping He

In this paper, we consider the KP-MEW(3,2) equation by the bifurcation theory of dynamical systems when integral constant is considered. The corresponding traveling wave system is a singular planar dynamical system with one singular straight line. The phase portrait for

c < 0

0 < c < 1

, and

c > 1

is drawn. Exact parametric representations of periodic peakon solutions and smooth periodic solution are presented.

Peakon

Phase portrait

Line (geometry)

10.1155/2021/6689771

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Bifurcations and exact traveling wave solutions for a modified Degasperis–Procesi equation

Advances in Difference Equations (2019)

Minzhi Wei

In this paper, the bifurcations of a modified Degasperis–Procesi equation are studied under different parametric conditions, which have not been investigated by the bifurcation theory of dynamical systems before. The existence of loop, periodic wave and smooth solitary wave solutions for the modified Degasperis–Procesi equation is proved, and exact expressions of corresponding traveling wave solutions are obtained.

Periodic wave

10.1186/s13662-019-2007-6

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Periodic wave solutions for a generalized reaction-convection–diffusion equation of high-order

Applied Mathematics Letters (2024)

Minzhi Wei Xingwu Chen Yanfei Dai

Reaction–diffusion system

Convection–diffusion equation

10.1016/j.aml.2024.109249

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