World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Mathematics 56 744 637 38 37 303 9817
Engineering and Technology 56 2888 2763 579 578 310 9857

Xiaoqi Yang publications per year

The chart shows the history of publications by Xiaoqi Yang between 1991 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Xiaoqi Yang published across 35 years, from 1991 to 2025, averaging 11.1 papers a year. Output peaked at 26 publications in 2025. 46 of the 387 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1991 to 2025. Vertical axis: number of publications, 0 to 26. Peak 26 publications in 2025. 1991: 1 publication 1992: 3 publications 1993: 5 publications 1994: 3 publications 1995: 5 publications 1996: 7 publications 1997: 7 publications 1998: 6 publications 1999: 9 publications 2000: 17 publications 2001: 18 publications 2002: 11 publications 2003: 21 publications 2004: 20 publications 2005: 25 publications 2006: 21 publications 2007: 18 publications 2008: 15 publications 2009: 5 publications 2010: 12 publications 2011: 5 publications 2012: 7 publications 2013: 5 publications 2014: 7 publications 2015: 12 publications 2016: 11 publications 2017: 5 publications 2018: 6 publications 2019: 5 publications 2020: 8 publications 2021: 8 publications 2022: 19 publications 2023: 14 publications 2024: 20 publications 2025: 26 publications
1991 2025

387 publications in total across all disciplines

View publications per year as a table
Xiaoqi Yang: publications per year, 1991 to 2025
Year Publications
1991 1
1992 3
1993 5
1994 3
1995 5
1996 7
1997 7
1998 6
1999 9
2000 17
2001 18
2002 11
2003 21
2004 20
2005 25
2006 21
2007 18
2008 15
2009 5
2010 12
2011 5
2012 7
2013 5
2014 7
2015 12
2016 11
2017 5
2018 6
2019 5
2020 8
2021 8
2022 19
2023 14
2024 20
2025 26
Total 387
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Xiaoqi Yang publications per year - data summary

  • Xiaoqi Yang, a Mathematics scholar from Hong Kong Polytechnic University, has 387 publications recorded across 35 years, from 1991 to 2025.
  • The oldest publication on record dates to 1991 and the most recent to 2025.
  • The most productive year is 2025, with 26 publications.
  • The least productive year with any output is 1991, with 1 publication.
  • The rate of publication averages 11.1 papers per year over the whole span, or 11.1 per year counting only the 35 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 87 publications, 22% of the career total.
  • Split into equal eras - 1991-2002: 92 publications (7.7 per year); 2003-2014: 161 publications (13.4 per year); 2015-2025: 134 publications (12.2 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Xiaoqi Yang publication distribution in Mathematics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mathematics in 2026. The highlighted bar marks where Xiaoqi Yang sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 100 bars. Horizontal axis: publications, 42–46 to 537+. Vertical axis: number of scientists, 0 to 112. Most scientists, 112, have 142–146 publications. The last bar groups every scientist with 537 publications or more. The highlighted bar, 302–306 publications, is where this scientist sits. 42–46 publications: 3 scientists 47–51 publications: 5 scientists 52–56 publications: 7 scientists 57–61 publications: 20 scientists 62–66 publications: 14 scientists 67–71 publications: 25 scientists 72–76 publications: 19 scientists 77–81 publications: 35 scientists 82–86 publications: 50 scientists 87–91 publications: 60 scientists 92–96 publications: 86 scientists 97–101 publications: 84 scientists 102–106 publications: 83 scientists 107–111 publications: 90 scientists 112–116 publications: 99 scientists 117–121 publications: 90 scientists 122–126 publications: 91 scientists 127–131 publications: 109 scientists 132–136 publications: 110 scientists 137–141 publications: 98 scientists 142–146 publications: 112 scientists 147–151 publications: 102 scientists 152–156 publications: 88 scientists 157–161 publications: 106 scientists 162–166 publications: 83 scientists 167–171 publications: 102 scientists 172–176 publications: 77 scientists 177–181 publications: 81 scientists 182–186 publications: 78 scientists 187–191 publications: 71 scientists 192–196 publications: 92 scientists 197–201 publications: 64 scientists 202–206 publications: 69 scientists 207–211 publications: 64 scientists 212–216 publications: 62 scientists 217–221 publications: 58 scientists 222–226 publications: 53 scientists 227–231 publications: 50 scientists 232–236 publications: 46 scientists 237–241 publications: 46 scientists 242–246 publications: 46 scientists 247–251 publications: 43 scientists 252–256 publications: 29 scientists 257–261 publications: 45 scientists 262–266 publications: 30 scientists 267–271 publications: 33 scientists 272–276 publications: 34 scientists 277–281 publications: 30 scientists 282–286 publications: 31 scientists 287–291 publications: 21 scientists 292–296 publications: 34 scientists 297–301 publications: 26 scientists 302–306 publications: 10 scientists 307–311 publications: 17 scientists 312–316 publications: 23 scientists 317–321 publications: 13 scientists 322–326 publications: 16 scientists 327–331 publications: 26 scientists 332–336 publications: 13 scientists 337–341 publications: 13 scientists 342–346 publications: 16 scientists 347–351 publications: 17 scientists 352–356 publications: 12 scientists 357–361 publications: 18 scientists 362–366 publications: 18 scientists 367–371 publications: 9 scientists 372–376 publications: 11 scientists 377–381 publications: 8 scientists 382–386 publications: 8 scientists 387–391 publications: 9 scientists 392–396 publications: 9 scientists 397–401 publications: 8 scientists 402–406 publications: 11 scientists 407–411 publications: 6 scientists 412–416 publications: 6 scientists 417–421 publications: 9 scientists 422–426 publications: 8 scientists 427–431 publications: 5 scientists 432–436 publications: 8 scientists 437–441 publications: 8 scientists 442–446 publications: 4 scientists 447–451 publications: 4 scientists 452–456 publications: 4 scientists 457–461 publications: 2 scientists 462–466 publications: 2 scientists 467–471 publications: 4 scientists 472–476 publications: 3 scientists 477–481 publications: 3 scientists 482–486 publications: 6 scientists 487–491 publications: 3 scientists 492–496 publications: 5 scientists 497–501 publications: 5 scientists 502–506 publications: 1 scientist 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientist 522–526 publications: 3 scientists 527–531 publications: 1 scientist 532–536 publications: 4 scientists 537+ publications: 100 scientists
42–46 publications 537+

This scientist: 303 publications — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 537 publications or more.

View publications distribution as a table
Number of Mathematics scientists by publication count, Research.com 2026 ranking edition. Based on 3,584 ranked scientists.
Publications Scientists This scientist
42–46 3
47–51 5
52–56 7
57–61 20
62–66 14
67–71 25
72–76 19
77–81 35
82–86 50
87–91 60
92–96 86
97–101 84
102–106 83
107–111 90
112–116 99
117–121 90
122–126 91
127–131 109
132–136 110
137–141 98
142–146 112
147–151 102
152–156 88
157–161 106
162–166 83
167–171 102
172–176 77
177–181 81
182–186 78
187–191 71
192–196 92
197–201 64
202–206 69
207–211 64
212–216 62
217–221 58
222–226 53
227–231 50
232–236 46
237–241 46
242–246 46
247–251 43
252–256 29
257–261 45
262–266 30
267–271 33
272–276 34
277–281 30
282–286 31
287–291 21
292–296 34
297–301 26
302–306 10 303
307–311 17
312–316 23
317–321 13
322–326 16
327–331 26
332–336 13
337–341 13
342–346 16
347–351 17
352–356 12
357–361 18
362–366 18
367–371 9
372–376 11
377–381 8
382–386 8
387–391 9
392–396 9
397–401 8
402–406 11
407–411 6
412–416 6
417–421 9
422–426 8
427–431 5
432–436 8
437–441 8
442–446 4
447–451 4
452–456 4
457–461 2
462–466 2
467–471 4
472–476 3
477–481 3
482–486 6
487–491 3
492–496 5
497–501 5
502–506 1
507–511 6
512–516 4
517–521 1
522–526 3
527–531 1
532–536 4
537+ 100
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Xiaoqi Yang publication distribution in Mathematics in 2026 - data summary

  • The chart plots the publication count of all 3,584 Mathematics scientists ranked by Research.com in 2026, grouped into 100 ranges running from 42–46 to 537+ publications.
  • Xiaoqi Yang, a Mathematics scholar from Hong Kong Polytechnic University, records 303 publications - the 86th percentile of the discipline.
  • 86% of ranked Mathematics scientists score the same or lower than Xiaoqi Yang, and about 14% score higher.
  • The median of the discipline falls in the 172–176 publications range, and Xiaoqi Yang ranks above the median.
  • The most crowded range is 142–146 publications, holding 112 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 162–166 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 537 publications or more, 100 scientists in all (3% of the field).

Xiaoqi Yang D-index placement in Mathematics in 2026

The chart shows the D-index (discipline H-index) distribution of Mathematics scientists ranked by Research.com in 2026. The highlighted bar marks where Xiaoqi Yang sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 57 bars. Horizontal axis: D-Index, 30 to 86+. Vertical axis: number of scientists, 0 to 174. Most scientists, 174, have 30 D-Index. The last bar groups every scientist with 86 D-Index or more. The highlighted bar, 56 D-Index, is where this scientist sits. 30 D-Index: 174 scientists 31 D-Index: 151 scientists 32 D-Index: 174 scientists 33 D-Index: 117 scientists 34 D-Index: 136 scientists 35 D-Index: 127 scientists 36 D-Index: 145 scientists 37 D-Index: 153 scientists 38 D-Index: 150 scientists 39 D-Index: 150 scientists 40 D-Index: 138 scientists 41 D-Index: 136 scientists 42 D-Index: 93 scientists 43 D-Index: 108 scientists 44 D-Index: 115 scientists 45 D-Index: 112 scientists 46 D-Index: 103 scientists 47 D-Index: 75 scientists 48 D-Index: 59 scientists 49 D-Index: 67 scientists 50 D-Index: 60 scientists 51 D-Index: 57 scientists 52 D-Index: 59 scientists 53 D-Index: 62 scientists 54 D-Index: 60 scientists 55 D-Index: 50 scientists 56 D-Index: 42 scientists 57 D-Index: 54 scientists 58 D-Index: 50 scientists 59 D-Index: 42 scientists 60 D-Index: 41 scientists 61 D-Index: 35 scientists 62 D-Index: 40 scientists 63 D-Index: 21 scientists 64 D-Index: 31 scientists 65 D-Index: 27 scientists 66 D-Index: 29 scientists 67 D-Index: 19 scientists 68 D-Index: 25 scientists 69 D-Index: 17 scientists 70 D-Index: 18 scientists 71 D-Index: 12 scientists 72 D-Index: 14 scientists 73 D-Index: 13 scientists 74 D-Index: 18 scientists 75 D-Index: 9 scientists 76 D-Index: 11 scientists 77 D-Index: 10 scientists 78 D-Index: 9 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 10 scientists 82 D-Index: 5 scientists 83 D-Index: 5 scientists 84 D-Index: 13 scientists 85 D-Index: 6 scientists 86+ D-Index: 99 scientists
30 D-Index 86+

This scientist: 56 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 86 D-Index or more.

View D-Index distribution as a table
Number of Mathematics scientists by D-index, Research.com 2026 ranking edition. Based on 3,584 ranked scientists.
D-Index Scientists This scientist
30 174
31 151
32 174
33 117
34 136
35 127
36 145
37 153
38 150
39 150
40 138
41 136
42 93
43 108
44 115
45 112
46 103
47 75
48 59
49 67
50 60
51 57
52 59
53 62
54 60
55 50
56 42 56
57 54
58 50
59 42
60 41
61 35
62 40
63 21
64 31
65 27
66 29
67 19
68 25
69 17
70 18
71 12
72 14
73 13
74 18
75 9
76 11
77 10
78 9
79 16
80 12
81 10
82 5
83 5
84 13
85 6
86+ 99
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Xiaoqi Yang D-index placement in Mathematics in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,584 Mathematics scientists ranked by Research.com in 2026, grouped into 57 ranges running from 30 to 86+ D-Index.
  • Xiaoqi Yang, a Mathematics scholar from Hong Kong Polytechnic University, records 56 D-Index - the 80th percentile of the discipline.
  • 80% of ranked Mathematics scientists score the same or lower than Xiaoqi Yang, and about 20% score higher.
  • The median of the discipline falls in the 42 D-Index range, and Xiaoqi Yang ranks above the median.
  • The most crowded range is 30 D-Index, holding 174 scientists (5% of the field).
  • 58% of the field sits in the lowest quarter of the value range (up to 44 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 86 D-Index or more, 99 scientists in all (3% of the field).

Overview

Xiaoqi Yang is affiliated with Hong Kong Polytechnic University in China and has focused research contributions primarily in the fields of Mathematics and Computer Science. Their work spans several key areas including optimization, numerical analysis, computational theory, and computational mechanics.

The researcher has published extensively with 53 publications in Mathematics and 46 in Computer Science, with notable subfields of study including computational theory and mathematics, numerical analysis, computational mechanics, molecular biology, and mathematical physics.

Their main research topics cover a range of specialized fields:

  • Optimization and Variational Analysis
  • Advanced Optimization Algorithms Research
  • Sparse and Compressive Sensing Techniques
  • Numerical methods in inverse problems
  • Fixed Point Theorems Analysis
  • Contact Mechanics and Variational Inequalities
  • Land Use and Ecosystem Services

Xiaoqi Yang has frequently published in well-known venues with repeated contributions to arXiv (Cornell University), SSRN Electronic Journal, Journal of Global Optimization, Optimization, and SIAM Journal on Optimization. These venues reflect a focus on applied mathematics and optimization research.

Their notable recent papers include:

  • Toward green equity: An extensive study on urban form and green space equity for shrinking cities (2023), Sustainable Cities and Society
  • Quality changes of duck meat during thermal sterilization processing caused by microwave, stepwise retort, and general retort heating (2022), Frontiers in Nutrition
  • Ultrafast self-powered CsPbCl3 ultraviolet photodetectors with choline chloride for surface passivation and charge transport regulation (2023), Journal of Materials Chemistry C
  • In situ construction of ultra-thin PANI/CeOx layer on proton exchange membrane for enhanced oxidation resistance in PEMFC (2023), Journal of Membrane Science
  • Linear convergence of inexact descent method and inexact proximal gradient algorithms for lower-order regularization problems (2020), Journal of Global Optimization

Collaborative research with frequent co-authors includes:

  • Kaiwen Meng, with whom Xiaoqi Yang has co-authored 8 papers
  • Wenfang Yao (6 papers)
  • Shaohua Pan (5 papers)
  • Yaohua Hu (5 papers)
  • Yuqia Wu (4 papers)

The scientist's interdisciplinary involvement, spanning topics from urban green equity to thermal processing of food products, alongside core work in mathematical optimization, highlights a diverse research portfolio. Their publications reflect engagements with both theoretical frameworks and practical applications across fields.

Best Publications

  • Vector Optimization: Set-valued and Variational Analysis

    Guang-ya Chen;Xuexiang Huang;Xiaoqi Yang

  • Coordination of supply chains by option contracts: A cooperative game theory approach

    Yingxue Zhao;Yingxue Zhao;Shouyang Wang;T.C.E. Cheng;Xiaoqi Yang

  • Generalized invexity and generalized invariant monotonicity

    X.M. Yang;X.Q. Yang;K.L. Teo

  • Portfolio Optimization Under a Minimax Rule

    Xiaoqiang Cai;Kok-Lay Teo;Xiaoqi Yang;Xun Yu Zhou

  • A class of nonconvex functions and pre-variational inequalities

    Xiaoqi Yang;Guang Ya Chen

  • A Nonlinear Scalarization Function and Generalized Quasi-vector Equilibrium Problems

    G. Y. Chen;X. Q. Yang;H. Yu

  • Lagrange-type functions in constrained non-convex optimization

    Aleksandr Moiseevich Rubinov;Xiaoqi Yang

  • Characterizations and applications of prequasi-invex functions

    X. M. Yang;X. M. Yang;X. Q. Yang;K. L. Teo

  • Power penalty method for a linear complementarity problem arising from american option valuation

    Song Wang;X.Q. Yang;K.L. Teo

  • On vector variational inequalities: application to vector equilibria

    X. Q. Yang;C. J. Goh

  • A Unified Augmented Lagrangian Approach to Duality and Exact Penalization

    X. X. Huang;X. Q. Yang

  • Second-order duality for nonlinear programming

    X. M. Yang;X. M. Yang;Xiaoqi Yang;K. L. Teo;S. H. Hou

  • Vector variational inequality and its duality

    X.Q. Yang

  • Generalized Levitin--Polyak Well-Posedness in Constrained Optimization

    X. X. Huang;X. X. Huang;X. Q. Yang

  • Vector complementarity and minimal element problems

    X. Q. Yang

  • Decreasing Functions with Applications to Penalization

    A. M. Rubinov;B. M. Glover;X. Q. Yang

  • Vector variational inequality and vector pseudolinear optimization

    X. Q. Yang

  • On Gap Functions for Vector Variational Inequalities

    Guang-ya Chen;Chuen-Jin Goh;Xiao Qi Yang

  • Generalized convex functions and vector variational inequalities

    X. Q. Yang

  • Gap Functions and Existence of Solutions to Set-Valued Vector Variational Inequalities

    Xiaoqi Yang;J. C. Yao

Frequent Co-Authors

Kok Lay Teo
Kok Lay Teo Sunway University
Vaithilingam Jeyakumar
Vaithilingam Jeyakumar University of New South Wales
Xiang Peng
Xiang Peng Shenzhen University
Jen-Chih Yao
Jen-Chih Yao China Medical University
T.C.E. Cheng
T.C.E. Cheng Hong Kong Polytechnic University
Qamrul Hasan Ansari
Qamrul Hasan Ansari King Fahd University of Petroleum and Minerals
Xiaoqiang Cai
Xiaoqiang Cai Chinese University of Hong Kong
Yu-Hong Dai
Yu-Hong Dai Chinese Academy of Sciences
Xun Yu Zhou
Xun Yu Zhou Columbia University
Zhimin Huang
Zhimin Huang Adelphi University

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