Jun Pan

ORCID: 0000-0002-2994-5070
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About
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Research Areas
  • Gastrointestinal Bleeding Diagnosis and Treatment
  • Gastric Cancer Management and Outcomes
  • Chaos control and synchronization
  • Nonlinear Dynamics and Pattern Formation
  • Quantum chaos and dynamical systems
  • Gastrointestinal disorders and treatments
  • Advanced Differential Equations and Dynamical Systems
  • Liver Disease and Transplantation
  • Liver Disease Diagnosis and Treatment
  • Esophageal and GI Pathology
  • Gastroesophageal reflux and treatments
  • Advanced Neural Network Applications
  • stochastic dynamics and bifurcation
  • Helicobacter pylori-related gastroenterology studies
  • Colorectal Cancer Screening and Detection
  • Integrated Energy Systems Optimization
  • Ferroptosis and cancer prognosis
  • Pituitary Gland Disorders and Treatments
  • Energy and Environment Impacts
  • Air Quality Monitoring and Forecasting
  • Remote Sensing and LiDAR Applications
  • Topic Modeling
  • Nonlinear Waves and Solitons
  • Nonlinear Photonic Systems
  • Radio Astronomy Observations and Technology

Zhejiang University of Science and Technology
2019-2025

Shanghai Civil Aviation College
2022-2024

Changhai Hospital
2018-2024

National Clinical Research Center for Digestive Diseases
2018-2024

Second Military Medical University
2018-2024

Hubei University of Medicine
2015-2024

Taihe Hospital
2008-2024

Ministry of Ecology and Environment
2023-2024

Chongqing Three Gorges University
2023-2024

Hefei University of Technology
2024

10.3934/era.2025061 article EN cc-by Electronic Research Archive 2025-01-01

Although the axis-symmetric singularly degenerate heteroclinic cycles with nearby bifurcated Lorenz-like attractors in system family were intensively studied past decades, scenario asymmetric has not been investigated. This paper revisits a simple system, and illustrates attractors. In addition, it is proved that there exists pair of orbits to stable origin, unstable nontrivial equilibria, contrast axis/centro-symmetric ones origin equilibria most reported systems. Moreover, this casts...

10.1142/s0218127425500725 article EN International Journal of Bifurcation and Chaos 2025-03-25

This paper introduces a novel 3D periodically forced extended Lorenz-like system and illustrates single thick two-scroll attractor with potential unboundedness whose time series of the second state variable present some certain random characteristics rather than pure periodicity yielded by that itself. Combining Lyapunov function definitions both α-limit set ω-limit set, following rigorous results are proved: infinitely many heteroclinic orbits to two families parallel parabolic-type...

10.3390/axioms14040264 article EN cc-by Axioms 2025-03-30

<abstract><p>Revisiting a newly reported modified Chen system by both the definitions of $ \alpha $-limit and \omega set, Lyapunov function Hamiltonian function, this paper seized multitude pairs potential heteroclinic orbits to (1) E_{0} E_{\pm} $, or (2) E_{+} (3) E_{-} homoclinic on its invariant algebraic surface Q = z - \frac{x^{2}}{2a} 0 with cofactor -2a which is not available in existing literature best our knowledge. Particularly, theoretical conclusions were verified...

10.3934/era.2024049 article EN cc-by Electronic Research Archive 2024-01-01

In the sense that descending powers of some certain variables may widen range parameters self-excited and hidden attractors, this technical note proposes a new three-dimensional Lorenz-like system degree [Formula: see text]. contrast to previously studied one text], newly reported creates more attractors coexisting with unstable origin pair stable node-foci in broader parameters, which confirms generalization second part celebrated Hilbert’s 16th problem once more. addition, other dynamics,...

10.1142/s0218127424500718 article EN International Journal of Bifurcation and Chaos 2024-05-01

Abstract Objective To evaluate the diagnostic accuracy and safety of using magnetically guided capsule endoscopy with a detachable string (ds-MCE) for detecting grading oesophagogastric varices in adults cirrhosis. Design Prospective multicentre study. Setting 14 medical centres China. Participants 607 (>18 years) cirrhosis recruited between 7 January 2021 25 August 2022. underwent ds-MCE (index test), followed by oesophagogastroduodenoscopy (OGD, reference test) within 48 hours. The...

10.1136/bmj-2023-078581 article EN cc-by-nc BMJ 2024-03-05

Abstract Although the axis-symmetric heteroclinic orbits of Lorenz-like systems have been intensively studied in past decades, scholars seem to pay scant attention centro-symmetric ones. To achieve this target, present paper introduces a new subquadratic three-dimensional system: $\dot{x}=a(y - x)$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>x</mml:mi> <mml:mo>˙</mml:mo> </mml:mover> <mml:mo>=</mml:mo> <mml:mi>a</mml:mi> <mml:mo>(</mml:mo> <mml:mi>y</mml:mi>...

10.1186/s13662-024-03809-4 article EN cc-by Advances in Continuous and Discrete Models 2024-05-22

Abstract Little seems to be considered about the globally exponentially asymptotical stability of parabolic type equilibria and existence heteroclinic orbits in Lorenz-like system with high-order nonlinear terms. To achieve this target, by adding terms yz $$x^{2}y$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>x</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mi>y</mml:mi></mml:mrow></mml:math> second equation system, paper introduces new 3D cubic system:...

10.1038/s41598-023-33826-4 article EN cc-by Scientific Reports 2023-04-24

Compared with most known singularly degenerate heteroclinic cycles consisting of two different equilibria a line or curve, parallel lines semi-hyperbolic equilibria, little seems to be noticed about the one that connects perpendicular i.e. [Formula: see text] and text], which is found in mathematical chaos model: when text]. Surprisingly, apple-shape attractors are also created nearby kind case small Further, some other rich dynamics uncovered, global boundedness, Hopf bifurcation, limit...

10.1142/s0218127423500116 article EN International Journal of Bifurcation and Chaos 2023-01-01

Total resection of adamantinomatous craniopharyngioma (ACP) is complex and often leads to postoperative recurrence. This due the tendency tumor invade surrounding brain tissue generation a local inflammatory state between cells parenchyma. While there evidence suggest that interleukin‑6 (IL‑6) induces (CP)‑associated inflammation, particularly in ACP, role IL‑6 progression ACP remains unclear. The results present study demonstrated CP inflammation was associated with pathological...

10.3892/mmr.2017.6538 article EN cc-by-nc-nd Molecular Medicine Reports 2017-05-02

Abstract Background Esophageal capsule endoscopy is reported to be insufficiently accurate replace esophagogastroduodenoscopy (EGD) because the passage of through esophagus passive and precludes a thorough investigation. We developed modified technique, called detachable string magnetically controlled (DS-MCE), performed pilot study assess feasibility safety this novel technique. Methods 4 healthy volunteers 21 patients with suspected esophageal disease first underwent DS-MCE followed by EGD...

10.1055/a-0856-6845 article EN Endoscopy 2019-03-01

&lt;p style='text-indent:20px;'&gt;Based on the method of compression and pull forming mechanism (CAP), authors in a well-known paper proposed analyzed Lü-like system: &lt;inline-formula&gt;&lt;tex-math id="M1"&gt;\begin{document}$ \dot{x} = a(y - x) + dxz $\end{document}&lt;/tex-math&gt;&lt;/inline-formula&gt;, id="M2"&gt;\begin{document}$ \dot{y} xz fy id="M3"&gt;\begin{document}$ \dot{z} -ex^{2} xy cz which was thought to display an interesting three-scroll chaotic attractors (called as...

10.3934/dcdsb.2021165 article EN Discrete and Continuous Dynamical Systems - B 2021-07-05

In contrast to the coexistence of infinitely many pseudo and true singularly degenerate heteroclinic cycles with nearby two-scroll hyperchaotic Lorenz-like attractors coined in four-dimensional systems, this note reports ones bifurcated chaotic a new 3D cubic system. Except for rabbit head/boat shape attractors, there exist globally exponentially asymptotically stable parabolic type equilibria pair orbits. addition, numerical simulations also validate correctness theoretical analysis.

10.1016/j.rinp.2023.107243 article EN cc-by-nc-nd Results in Physics 2023-12-24

Magnetically controlled capsule endoscopy (MCE), a painless noninvasive screening tool for gastric diseases, has been an emerging diagnostic modality in clinical practice.1Liao Z. Duan X.D. Xin L. et al.Feasibility and safety of magnetic-controlled system examination human stomach: pilot study healthy volunteers.J Interv Gastroenterol. 2012; 2: 155-160Google Scholar, 2Zou W.B. Hou X.H. al.Magnetic-controlled vs. gastroscopy diseases: two-center self-controlled comparative trial.Endoscopy....

10.1016/j.vgie.2019.03.003 article EN cc-by-nc-nd VideoGIE 2019-05-30

Combining qualitative analysis and numerical technique, the present work revisits a four-dimensional circuit system in [Ma et al., 2016] mainly reveals some of its rich dynamics not yet investigated: pitchfork bifurcation, Hopf singularly degenerate heteroclinic cycle, globally exponentially attractive set, invariant algebraic surface orbit. The main contributions are summarized as follows: Firstly, it is proved that there exists set with three different exponential rates by constructing...

10.1142/s0218127421502084 article EN International Journal of Bifurcation and Chaos 2021-11-01

10.1140/epjs/s11734-021-00423-3 article EN The European Physical Journal Special Topics 2022-01-04

Functional constipation (FC) is an intractable disease that carries large financial burden as well emotional and physical stress. We aimed to assess the efficacy safety of newly developed smartphone-controlled vibrating capsule (VC) in patients with FC.From December 2018 February 2020, we did a multicenter, blinded, placebo-controlled randomised trial six top general hospitals China focusing on aged 18 80 FC. Patients were randomly assigned 1:1 ratio receive VCs or placebo treatment for...

10.1016/j.eclinm.2022.101407 article EN cc-by-nc-nd EClinicalMedicine 2022-04-25
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