Yong-Jiang Guo’s research while affiliated with Beijing University of Posts and Telecommunications and other places

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Publications (54)


Cosmic-Plasma Environment, Singular Manifold and Symbolic Computation for a Variable-Coefficient (2+1)-Dimensional Zakharov-Kuznetsov-Burgers Equation
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February 2025

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23 Reads

Qualitative Theory of Dynamical Systems

Xin-Yi Gao

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Yong-Jiang Guo

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Recent manifold contributions have been made to the nonlinear partial differential equations in fluid mechanics, plasma astrophysics, optical fiber communication, chemistry, etc., while people have known that most of the baryonic matter in the Universe is believed to exist as the plasmas. Hereby, with symbolic computation, we investigate a variable-coefficient (2 ⁣ ⁣+ ⁣ ⁣1)(2\!\!+\!\!1)-dimensional Zakharov-Kuznetsov-Burgers equation for such cosmic-plasma environments as the neutron stars/pulsar magnetospheres, relativistic jets from the nuclei of active galaxies and quasars, early Universe, center of the Milky Way, white dwarfs, planetary rings, comets, Earth’s auroral zone, interstellar molecular clouds, circumstellar disks and Earth’s ionosphere. Through a noncharacteristic movable singular manifold, auto-Bäcklund transformation and solitons are gotten for the electrostatic wave potential or low-frequency dust-ion-acoustic electrostatic potential, leaning upon such cosmic-plasma coefficient functions as the dispersion, nonlinearity and dissipation coefficients, which are related to, for example, the ion plasma frequency, ion cyclotron frequency, viscosity of the ion fluid, positron density, photoelectron density, electron density, ion temperature, electron temperature, mass of an ion, mass of a dust particle, and interaction frequency between the ions and dust particles.

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New insight to the shallow-water studies on a (2+1)-dimensional generalized Broer-Kaup system

Of current interest, there have recently appeared a series of the shallow-water papers in Mod. Phys. Lett. B. Illuminated by those papers and to make the story more complete, for the nonlinear long waves in the shallow water, this paper is scheduled to investigate a (2+1)-dimensional generalized Broer-Kaup system. As for the wave height and wave horizontal velocity, we employ symbolic computation, with the view of constructing out two groups of the similarity reductions.


Dynamical pathology, singular manifold, bilinear forms and solitons on a (3+1)-dimensional Jadaun-Singh equation in aortic dissection

July 2024

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13 Reads

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3 Citations

Indian Journal of Pure and Applied Mathematics

Recent soliton advances in Indian J. Pure Appl. Math. have been impressive, while as to the dynamical pathology, etc., aortic dissection has been seen as a catastrophic disease influencing the aorta. Hereby, symbolic computation is implemented on a (3+1)-dimensional Jadaun-Singh equation for the dynamical pathology in aortic dissection. Via the singular manifold, etc., auto-Bäcklund transformation, bilinear forms and M-soliton solutions are obtained, for the amplitude of the relevant wave, where M is a positive integer. Our results might assist some studies on the dynamical pathology in aortic dissection and cardiothoracic physicians in pinpointing the latent cases and working on such preventive regimens as the control of hypertension and restriction on physiological activity.


On the Strong Approximation for a Simple Reentrant Line in Light Traffic Under First-buffer First-served Service Discipline

July 2024

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2 Reads

Acta Mathematicae Applicatae Sinica

For a 2-station and 3-class reentrant line under first-buffer first-served (FBFS) service discipline in light traffic, we firstly construct the strong approximations for performance measures including the queue length, workload, busy time and idle time processes. Based on the obtained strong approximations, we use a strong approximation method to find all the law of the iterated logarithms (LILs) for the above four performance measures, which are expressed as some functions of system parameters: means and variances of interarrival and service times, and characterize the fluctuations around their fluid approximations.


Bilinear-form and similarity-reduction visit to a variable-coefficient generalized dispersive water-wave system concerning Acta Mech. 233, 2527 and 233, 2415

May 2024

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16 Reads

Acta Mechanica

Getting enthusiastic from two Acta Mech. water-wave advances, this Letter proposes to visit a variable-coefficient generalized dispersive water-wave system for certain long-weakly nonlinear and weakly-dispersive surface waves of variable depth in a shallow water. In regard to the height modeling the deviation from the equilibrium position of the water and to the surface velocity of water waves along a horizontal direction, we symbolically compute out the following: (1) bilinear forms, the same as those published but by way of a different method; (2) similarity reductions, each of which to a known ordinary differential equation. Results are related to the fluid density, velocity and viscosity.



Variability Analysis for a Two-station Queueing Network in Heavy Traffic with Arrival Processes Driven by Queues

March 2024

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25 Reads

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2 Citations

Acta Mathematicae Applicatae Sinica

The law of the iterated logarithm (LIL) for the performance measures of a two-station queueing network with arrivals modulated by independent queues is developed by a strong approximation method. For convenience, two arrival processes modulated by queues comprise the external system, all others are belong to the internal system. It is well known that the exogenous arrival has a great influence on the asymptotic variability of performance measures in queues. For the considered queueing network in heavy traffic, we get all the LILs for the queue length, workload, busy time, idle time and departure processes, and present them by some simple functions of the primitive data. The LILs tell us some interesting insights, such as, the LILs of busy and idle times are zero and they reflect a small variability around their fluid approximations, the LIL of departure has nothing to do with the arrival process, both of the two phenomena well explain the service station’s situation of being busy all the time. The external system shows us a distinguishing effect on the performance measures: an underloaded (overloaded, critically loaded) external system affects the internal system through its arrival (departure, arrival and departure together). In addition, we also get the strong approximation of the network as an auxiliary result.


On the Oceanic/Laky Shallow-Water Dynamics through a Boussinesq-Burgers System

December 2023

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23 Reads

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10 Citations

Qualitative Theory of Dynamical Systems

Motivation/Development: In order to investigate the shallow-water waves, researchers have introduced many nice models, e.g., a Boussinesq-Burgers system for cetain shallow-water waves near an ocean beach/inside a lake, which we study here via computerized symbolic computation. Originality/Novelty with Potential Application: Concerning the height deviating from the equilibrium position of water as well as the field of horizontal velocity, we now construct a hetero-Bäcklund transformation coupling that system to a known partial differential system, as well as two sets of the similarity reductions, starting at that system towards a known ordinary differential equation. Both our hetero-Bäcklund transformation and similarity reductions lean upon the dispersive power in the shallow water. Results could help the further study on the oceanic/laky shallow-water dynamics.


Report on an extended three-coupled Korteweg-de Vries system

April 2023

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23 Reads

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9 Citations

Ricerche di Matematica

Korteweg-de Vries (KdV)-type systems/models are commonly used for people to investigate the planetary atmospheres, optical fibers, rivers, oceans, cosmic plasmas, etc. Hereby, to an extended three-coupled KdV system, the Hirota method and symbolic computation help us bring about one set of the bilinear forms and two sets of the N-soliton solutions, with N as a positive integer. Graphically, e.g., interactions of the three solitons are seen to be elastic. All of our results rely on the coefficients in that system.



Citations (43)


... Different kinds of exact wave solutions are achieved in the literature by using different methods. Instantly; some exact wave solutions are obtained by applying the generalized kudryashov method in [14], different kinds of analytical wave solitons are achieved by using classical Lie-symmetry analysis in [15], distinct types of wave solitons are achieved by utilizing first integral scheme in [16], some exact wave solutions are obtained by using the Lie symmetry analysis method in [17], different types of exact soliton solutions are gained by using similarity reduction method in [18], some solutions are obtained by applying the shifted orthonormal Bernoulli polynomials in [19]. ...

Reference:

Exact wave solutions of truncated M-fractional Boussinesq-Burgers system via an effective method
On the Oceanic/Laky Shallow-Water Dynamics through a Boussinesq-Burgers System

Qualitative Theory of Dynamical Systems

... In recent years, Korteweg-de Vries (KdV)-type equations have attracted the attention of researchers, which have occurred in the fields of planetary oceans [1], atmospheres [2,3], cosmic plasmas [4][5][6] and so on [7][8][9][10][11][12][13][14][15][16][17]. In this paper, we will study a (3+1)-dimensional KdV equation with the time-dependent coefficients in a fluid [18], i.e., u yt + g 1 (t)u xxxy + g 2 (t)(u x u y ) x + g 3 (t)u x x + g 4 (t)u yy + g 5 (t)u yz = 0 , (1) where u is a differentiable function of the scaled spatial variables x, y and z and temporal variable t, the subscripts are the partial derivatives, while g (t) ( = 1, 2, · · · , 5) are the differentiable time-dependent functions. ...

Report on an extended three-coupled Korteweg-de Vries system
  • Citing Article
  • April 2023

Ricerche di Matematica

... We will confirm the correctness of Bilinear Forms (2). In Section 3, via the Clarkson-Kruskal direct method [65,66], we will create a set of the similarity reductions for System (1) which differs from those in Refs. [21,22], so as to simplify that system to a solvable ordinary differential equation (ODE). ...

Ocean shallow-water studies on a generalized Boussinesq-Broer-Kaup-Whitham system: Painlevé analysis and similarity reductions
  • Citing Article
  • April 2023

Chaos Solitons & Fractals

... Researchers use various methods such as ships, satellites, submarines, moorings, aircraft, and remote vehicles to investigate the ocean's surface and depths in order to understand the physical forces that control energy transfer, mixing processes, wave movement, turbulence, circulation at different scales, and the ocean's contribution to local weather and global climate within an interconnected system [6]. ...

Theoretical investigations on a variable-coefficient generalized forced-perturbed Korteweg-de Vries-Burgers model for a dilated artery, blood vessel or circulatory system with experimental support
  • Citing Article
  • February 2023

Communications in Theoretical Physics

... A scaling transformation, two hetero-Bäcklund transformations and a set of the similarity reductions for WBKEs were established in [15]. In [16,17], Bell polynomials and symbolic computation were shown to lead to two sets of auto-Bäcklund transformations and used to investigate different oceanic-water-wave dispersion. The bilinear form for WBKEs was constructed and three bilinear Bäcklund transformations with certain soliton-like solutions were formulated in [18]. ...

On a generalized Broer-Kaup-Kupershmidt system for the long waves in shallow water

Nonlinear Dynamics

... Recent decades have seen mathematicians and scientists proposing various methods to solve exact solutions for rapidly developing NLPDEs, such as the Lie symmetry method (LSM) [7][8][9][10][11], Hirota's bilinear method [12][13][14][15][16], auto-Bäcklund transformation [17][18][19][20], the G ′ /G 2 -expansion method [21][22][23][24], Darboux transformation [25][26][27], the tan-cot technique [28,29], the generalized Riccati equation expansion method [30], Painlevé's analysis [31,32], the optimal homotopy asymptotic method (OHAM) [33], the residual power series method (RPSM) [34], the inverse scattering transform method [35], and so on [36][37][38]. Lie symmetry analysis method serves as a powerful mathematical tool for finding exact solutions of NLPDEs. ...

Cosmic dusty plasmas via a (3+1)-dimensional generalized variable-coefficient Kadomtsev-Petviashvili-Burgers-type equation: auto-Bäcklund transformations, solitons and similarity reductions plus observational/experimental supports
  • Citing Article
  • July 2021

Waves in Random and Complex Media

... Investigations on the shallow water waves have been belonging to the cutting-edge issues in sciences and engineering [1][2][3][4][5][6][7][8][9][10][11][12], e.g., certain Paul-Painlevé and phaseplane analyses on a generalized (3+1)-dimensional shallow water wave model [1], oceanic/laky shallow-water dynamics through a Boussinesq-Burgers system [2], bilinear form, bilinear Bäcklund transformations, breather and periodic-wave solutions for a (2+1)-dimensional shallow water equation with the time-dependent coefficients [3], breather wave solutions for a (3+1)-dimensional generalized shallow water wave equation with variable coefficients [4], soliton and periodic wave solutions for a fractional Dullin-Gottwald-Holm equation describing the water waves in a shallow regime [5], consideration on the shallow water of a wide channel or an open sea through a generalized (2+1)-dimensional dispersive long-wave system [6], local well-posedness, wave breaking data and non-existence of the sech 2 solutions for a highly nonlinear shallow water equation [8], statistical characterization of the erosion and sediment transport mechanics in the shallow tidal environments [9] and oceanic shallow-water studies on a generalized Whitham-Broer-Kaup-Boussinesq-Kupershmidt system [10]. Other recent nonlinear-fluid studies have been reported, e.g., in Refs. ...

Letter to the Editor on a shallow water wave equation in Results Phys. 43, 106048 (2022) and its generalization
  • Citing Article
  • December 2022

Results in Physics

... Boussinesq-Burgers type equations have arisen in the study of shallow water waves [19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Other nonlinear evolution equations (NLEEs) have also been developed for those shallow water waves as well as some additional physical phenomena [33][34][35][36][37][38][39][40][41][42][43][44][45]. Since the solutions of the NLEEs can help people understand the relevant wave processes, researchers have employed a variety of the methods to obtain, or assist in solving some solutions for the NLEEs, such as the Bäcklund transformation [46][47][48], Hirota bilinear method [49][50][51][52], Darboux transformation [53][54][55][56] and so on. ...

Ultra-short optical pulses in a birefringent fiber via a generalized coupled Hirota system with the singular manifold and symbolic computation
  • Citing Article
  • December 2022

Applied Mathematics Letters

... (1a) v t À av xx À b uv ð Þ x ¼ 0; (1b) in which the real differentiable functions v(x, y, t) and u(x, y, t), respectively, imply the horizontal velocity of the water wave and the height of the water surface, a and b are the real non-zero constants, and the subscripts represent the partial derivatives concerning the scaled space variables x, y and time variable t. With symbolic computation (Anderson and Farazmand, 2024;Kovacs et al., 2024;Shen et al., 2023aShen et al., , 2023bGao et al., 2023b;Wu and Gao, 2023;Wu et al., 2023aWu et al., , 2023cWu et al., , 2023dZhou and Tian, 2022) in planning, Gao et al. (2023a) have given a set of the hetero-Bäcklund transformations, a set of the scaling transformations and four sets of the similarity reductions for system (1), whereas Liu et al. (2023) have investigated certain Lie point symmetry generators, Lie symmetry groups and symmetry reductions for system (1) with some analytic solutions. Shallow-water special cases of system (1) have been seen in Ying and Lou (2000), Li and Zhang (2004), Ma et al. (2015), Zhao and Han (2015), Kassem and Rashed (2019), Yamgou e et al. (2022), Gao et al. (2023a) as well as Liu et al. (2023). ...

Symbolically Computing the Shallow Water via a (2+1)-Dimensional Generalized Modified Dispersive Water-Wave System: Similarity Reductions, Scaling and Hetero-Bäcklund Transformations

Qualitative Theory of Dynamical Systems

... The (2 + 1) dimensional dispersion long wave equations(DLWEs) u yt + (v x + uu y ) x = 0, v t + (uv − u xy ) x = 0, (1.1) where u and v are wave amplitude functions in relation to spatial variables (x and y) and time variable (t). Eq. (1.1) is a mathematical model that describes the scenario of wide channels or open oceans with finite depth, which has substantial research significance in physics, engineering and earth science [1][2][3][4][5][6][7][8]. The DLWEs were initially introduced by Boiti in 1987 as a compatibility condition for a weak Lax pair [8]. ...

Oceanic shallow-water symbolic computation on a (2+1)-dimensional generalized dispersive long-wave system
  • Citing Article
  • November 2022

Physics Letters A