World's Best Scientists 2026 revealed!
Ricardo Almeida

Ricardo Almeida

D-Index & Metrics

Mathematics

D-Index
38
Citations
6223
World Ranking
2339
National Ranking
4

Ricardo Almeida 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 Ricardo Almeida sits on this spectrum.

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 scientists 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientists 522–526 publications: 3 scientists 527–531 publications: 1 scientists 532–536 publications: 4 scientists 537+ publications: 100 scientists
42 publications 537+

This scientist: 144 publications — 35th percentile

35% of scientists in this discipline score the same or lower.

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

Ricardo Almeida 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 Ricardo Almeida sits on this spectrum.

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: 38 D-Index — 37th percentile

37% of scientists in this discipline score the same or lower.

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

Overview

Ricardo Almeida is affiliated with the University of Aveiro in Portugal. Their research primarily focuses on the field of Mathematics, with significant contributions to Applied Mathematics, Modeling and Simulation, and Numerical Analysis. The scientist's work also spans areas such as Computer Networks and Communications and Control and Systems Engineering.

Their research topics are concentrated largely on Fractional Differential Equations Solutions and Nonlinear Differential Equations Analysis. Other important themes include Differential Equations and Numerical Methods, Distributed Control Multi-Agent Systems, Differential Equations and Boundary Problems, Advanced Control Systems Design, and Mathematical and Theoretical Epidemiology and Ecology Models.

Ricardo Almeida has published research in multiple scientific venues, notable among them:

  • Fractal and Fractional
  • Mathematics
  • AIMS Mathematics
  • Axioms
  • Entropy

Among their recent papers are:

  • Functional Differential Equations Involving the ψ-Caputo Fractional Derivative, 2020, Fractal and Fractional
  • Quadratic Lyapunov Functions for Stability of the Generalized Proportional Fractional Differential Equations with Applications to Neural Networks, 2021, Axioms
  • On the necessary optimality conditions for the fractional Cucker-Smale optimal control problem, 2020, Communications in Nonlinear Science and Numerical Simulation
  • Stability of Gene Regulatory Networks Modeled by Generalized Proportional Caputo Fractional Differential Equations, 2022, Entropy

The scientist has co-authored work frequently with:

  • Natália Martins
  • Snezhana Hristova
  • Agnieszka B. Malinowska
  • Ravi P. Agarwal
  • Ewa Girejko

Best Publications

  • A Caputo fractional derivative of a function with respect to another function

    Ricardo Almeida

  • Fractional differential equations with a Caputo derivative with respect to a Kernel function and their applications

    Ricardo Almeida;Agnieszka B. Malinowska;M.Teresa T. Monteiro

  • Necessary and sufficient conditions for the fractional calculus of variations with Caputo derivatives

    Ricardo Almeida;Delfim F.M. Torres

  • Calculus of variations with fractional derivatives and fractional integrals

    Ricardo Almeida;Delfim F.M. Torres

  • The Variable-Order Fractional Calculus of Variations

    Ricardo Almeida;Dina Tavares;Delfim F. M. Torres

  • Modeling some real phenomena by fractional differential equations

    Ricardo Almeida;Nuno R. O. Bastos;Nuno R. O. Bastos;M. Teresa T. Monteiro

  • Caputo derivatives of fractional variable order: Numerical approximations

    Dina Tavares;Dina Tavares;Ricardo Almeida;Delfim F. M. Torres

  • A fractional calculus of variations for multiple integrals with application to vibrating string

    Ricardo Almeida;Agnieszka B. Malinowska;Delfim F. M. Torres

  • Fractional differential equations with dependence on the Caputo-Katugampola derivative

    Ricardo Almeida;Agnieszka B. Malinowska;Tatiana Odzijewicz

  • Fractional order optimal control problems with free terminal time

    Shakoor Pooseh;Ricardo Almeida;Delfim F. M. Torres

  • Antifungal activity of silver nanoparticles and simvastatin against toxigenic species of Aspergillus.

    Karla Paiva Bocate;Guilherme Fonseca Reis;Patricia Canteri de Souza;Admilton G. Oliveira Junior

  • Analysis of a fractional SEIR model with treatment

    Ricardo Almeida

  • Computational Methods In The Fractional Calculus Of Variations

    Ricardo Almeida;Shakoor Pooseh;Delfim F M Torres

  • An epidemiological MSEIR model described by the Caputo fractional derivative

    Ricardo Almeida;Artur M. C. Brito da Cruz;Natália Martins;M. Teresa T. Monteiro

  • Isoperimetric Problems on Time Scales with Nabla Derivatives

    Ricardo Almeida;Delfim F.M. Torres

  • Modelling some real phenomena by fractional differential equations

    Ricardo Almeida;Nuno R. O. Bastos;M. Teresa T. Monteiro

  • Numerical approximations of fractional derivatives with applications

    Shakoor Pooseh;Ricardo Almeida;Delfim F. M. Torres

  • Targeted Transcriptional Repression in Bacteria Using CRISPR Interference (CRISPRi)

    John S. Hawkins;Spencer Wong;Spencer Wong;Jason M. Peters;Ricardo Almeida

  • Expansion Formulas in Terms of Integer-Order Derivatives for the Hadamard Fractional Integral and Derivative

    Shakoor Pooseh;Ricardo Almeida;Delfim F. M. Torres

  • A discrete method to solve fractional optimal control problems

    Ricardo Almeida;Delfim F. M. Torres

  • A Discrete Method to Solve Fractional Optimal Control Problems

    Ricardo Almeida;Delfim F. M. Torres

  • The calculus of variations and optimal control

    Ricardo Almeida;Shakoor Pooseh;Delfim F M Torres

Frequent Co-Authors

Delfim F. M. Torres
Delfim F. M. Torres University of Aveiro
Gustavo H. Goldman
Gustavo H. Goldman Universidade de São Paulo
Bernhard Hube
Bernhard Hube Leibniz Association
Wendell A. Lim
Wendell A. Lim University of California, San Francisco
Maria Helena S. Goldman
Maria Helena S. Goldman Universidade de São Paulo
Ravi P. Agarwal
Ravi P. Agarwal Florida Institute of Technology
Celso Vataru Nakamura
Celso Vataru Nakamura State University of Maringa
Robin C. Allshire
Robin C. Allshire University of Edinburgh
Donal O'Regan
Donal O'Regan University of Galway
Concepta McManus
Concepta McManus University of Brasília

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