Qingkai Kong

3.1k total citations
121 papers, 1.9k citations indexed

About

Qingkai Kong is a scholar working on Applied Mathematics, Numerical Analysis and Mathematical Physics. According to data from OpenAlex, Qingkai Kong has authored 121 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 81 papers in Applied Mathematics, 43 papers in Numerical Analysis and 43 papers in Mathematical Physics. Recurrent topics in Qingkai Kong's work include Nonlinear Differential Equations Analysis (66 papers), Differential Equations and Boundary Problems (44 papers) and Differential Equations and Numerical Methods (42 papers). Qingkai Kong is often cited by papers focused on Nonlinear Differential Equations Analysis (66 papers), Differential Equations and Boundary Problems (44 papers) and Differential Equations and Numerical Methods (42 papers). Qingkai Kong collaborates with scholars based in United States, China and Egypt. Qingkai Kong's co-authors include Anton Zettl, Lingju Kong, Lynn Erbe, Haotian Wu, John R. Graef, Min Wang, Hongyou Wu, Jianping Zhou, Ju H. Park and Taher S. Hassan and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of the Franklin Institute and Journal of Mathematical Analysis and Applications.

In The Last Decade

Qingkai Kong

113 papers receiving 1.7k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Qingkai Kong United States 26 1.2k 726 671 487 362 121 1.9k
Mokhtar Kirane France 28 1.5k 1.3× 943 1.3× 598 0.9× 587 1.2× 1.1k 3.0× 193 2.4k
Olof J. Staffans Finland 22 782 0.7× 758 1.0× 551 0.8× 896 1.8× 350 1.0× 99 2.4k
Frank Neubrander United States 10 1.4k 1.2× 1.0k 1.4× 310 0.5× 745 1.5× 331 0.9× 21 2.1k
Ming Mei Canada 27 1.2k 1.0× 801 1.1× 337 0.5× 290 0.6× 367 1.0× 117 2.0k
Nguyen Huy Tuan Vietnam 28 1.3k 1.1× 1.2k 1.7× 660 1.0× 737 1.5× 1.7k 4.7× 207 2.8k
Stig–Olof Londen Finland 14 854 0.7× 466 0.6× 336 0.5× 536 1.1× 414 1.1× 39 1.6k
А. М. Самойленко Ukraine 15 1.8k 1.5× 270 0.4× 1.0k 1.5× 291 0.6× 524 1.4× 82 2.4k
Yannick Sire United States 17 1.5k 1.3× 734 1.0× 189 0.3× 1.1k 2.2× 145 0.4× 94 1.9k
Jean‐Michel Roquejoffre France 24 778 0.7× 315 0.4× 283 0.4× 465 1.0× 511 1.4× 72 1.6k
Gusein Sh. Guseinov Türkiye 20 1.2k 1.0× 309 0.4× 489 0.7× 238 0.5× 344 1.0× 64 1.5k

Countries citing papers authored by Qingkai Kong

Since Specialization
Citations

This map shows the geographic impact of Qingkai Kong's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Qingkai Kong with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Qingkai Kong more than expected).

Fields of papers citing papers by Qingkai Kong

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Qingkai Kong. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Qingkai Kong. The network helps show where Qingkai Kong may publish in the future.

Co-authorship network of co-authors of Qingkai Kong

This figure shows the co-authorship network connecting the top 25 collaborators of Qingkai Kong. A scholar is included among the top collaborators of Qingkai Kong based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Qingkai Kong. Qingkai Kong is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Hassan, Taher S., et al.. (2023). Oscillation Criteria for Advanced Half-Linear Differential Equations of Second Order. Mathematics. 11(6). 1385–1385. 6 indexed citations
2.
Wang, Yun, et al.. (2023). Zero-sum game-based optimal control for discrete-time Markov jump systems: A parallel off-policy Q-learning method. Applied Mathematics and Computation. 467. 128462–128462. 3 indexed citations
3.
Kong, Qingkai, et al.. (2016). Lyapunov-type inequalities for odd order linear differential equations. SHILAP Revista de lepidopterología. 4 indexed citations
4.
Kong, Qingkai, et al.. (2016). Linear Sturm–Liouville problems with general homogeneous linear multi‐point boundary conditions. Mathematische Nachrichten. 289(17-18). 2223–2234. 1 indexed citations
5.
Qiu, Zhipeng, Qingkai Kong, Xue-Zhi Li, & Maia Martcheva. (2013). The vector–host epidemic model with multiple strains in a patchy environment. Journal of Mathematical Analysis and Applications. 405(1). 12–36. 22 indexed citations
6.
Hassan, Taher S. & Qingkai Kong. (2011). INTERVAL CRITERIA FOR FORCED OSCILLATION OF DIFFERENTIAL EQUATIONS WITH p-LAPLACIAN, DAMPING, AND MIXED NONLINEARITIES. Dynamic Systems and Applications. 20. 9 indexed citations
7.
Kong, Qingkai & Xiaofei Wang. (2011). NONLINEAR BOUNDARY VALUE PROBLEMS WITH p-LAPLACIAN. 15(1). 1 indexed citations
8.
Kong, Qingkai & Anton Zettl. (2011). Inverse Sturm–Liouville problems with finite spectrum. Journal of Mathematical Analysis and Applications. 386(1). 1–9. 15 indexed citations
9.
Graef, John R., et al.. (2011). Second order boundary value problems with sign-changing nonlinearities and nonhomogeneous boundary conditions. Mathematica Bohemica. 136(4). 337–356. 2 indexed citations
10.
Kong, Qingkai & Anton Zettl. (2010). The study of Jacobi and cyclic Jacobi matrix eigenvalue problems using Sturm–Liouville theory. Linear Algebra and its Applications. 434(7). 1648–1655. 8 indexed citations
11.
Graef, John R., Lingju Kong, & Qingkai Kong. (2009). Existence of three solutions for a higher-order boundary-value problem. SHILAP Revista de lepidopterología. 1 indexed citations
12.
Kong, Qingkai, et al.. (2007). Geometric aspects of Sturm–Liouville problems III. Level surfaces of the nth eigenvalue. Journal of Computational and Applied Mathematics. 208(1). 176–193. 9 indexed citations
13.
Kong, Qingkai, et al.. (2005). New kamenev-type oscillation criteria for second-order differential equations on a measure chain. Computers & Mathematics with Applications. 50(8-9). 1211–1230. 13 indexed citations
14.
Kong, Qingkai, Haotian Wu, & Anton Zettl. (2004). Singular left-definite Sturm–Liouville problems. Journal of Differential Equations. 206(1). 1–29. 19 indexed citations
15.
Kong, Qingkai, et al.. (2004). Kamenev-type and interval oscillation criteria for second-order linear differential equations on a measure chain. Journal of Mathematical Analysis and Applications. 294(2). 621–643. 28 indexed citations
16.
Kong, Qingkai, Haotian Wu, & Anton Zettl. (2004). Multiplicity of Sturm–Liouville eigenvalues. Journal of Computational and Applied Mathematics. 171(1-2). 291–309. 7 indexed citations
17.
Kong, Qingkai, Haotian Wu, & Anton Zettl. (2001). Left-Definite Sturm–Liouville Problems. Journal of Differential Equations. 177(1). 1–26. 33 indexed citations
18.
Kong, Qingkai, Haotian Wu, & Anton Zettl. (2001). Sturm–Liouville Problems with Finite Spectrum. Journal of Mathematical Analysis and Applications. 263(2). 748–762. 44 indexed citations
19.
Kong, Qingkai. (1994). OSCILLATION OF A FORCED SECOND ORDER NONLINEAR EQUATION. 2 indexed citations
20.
Erbe, Lynn & Qingkai Kong. (1994). Oscillation and Nonoscillation Properties of Neutral Differential Equations. Canadian Journal of Mathematics. 46(2). 284–297. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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