Photo of Manuel D. Ortigueira
  • Portugal

Accepting PhD Students

  • 2132 Citations
  • 23 h-Index
1984 …2019

Research output per year

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Research Output at NOVA

2013

Observability and Controllability of Fractional Linear Dynamical Systems

Ortigueira, M. D., 1 Jan 2013, IFAC Joint Conference SSSC. p. 893-898

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
5 Citations (Scopus)
2012

An Automatic Sleep Spindle Detector based on WT, STFT and WMSD

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, In : Proceedings Of World Academy Of Science, Engineering And Technology. 68, NA, p. 2154-2157

Research output: Contribution to journalArticle

A New Approach to Rational Discrete-Time Approximations to Continuous-Time Fractional-Order Systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, IFIP Advances in Information and Communication Technology. Vol. 372. p. 251-258

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access

A real regularised fractional derivative

Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, In : Signal, Image And Video Processing. 6, SI3, p. 351-358

Research output: Contribution to journalArticle

Open Access
13 Citations (Scopus)

A Relation Between the Fractional Derivative and the Hilbert Transform

Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, Mathmod - International Conference on Mathematical Modelling. p. 597-599

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access

A unified approach to fractional derivatives

Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, In : Communications In Nonlinear Science And Numerical Simulation. 17, 12, p. 5151-5157

Research output: Contribution to journalArticle

Open Access
24 Citations (Scopus)

Short Time Fourier Transform and Automatic Visual Scoring for the Detection of Sleep Spindles

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, IFIP Advances in Information and Communication Technology. Vol. 372. p. 267-272

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access

Sleep Spindles Detection: a Mixed Method using STFT and WMSD

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, In : International Journal Of Bioelectromagnetism. 14, 4, p. 229-233

Research output: Contribution to journalArticle

The incremental ratio based causal Fractional Calculus

Ortigueira, M. D., 1 Apr 2012, In : International Journal of Bifurcation and Chaos. 22, 4, p. 9 pages

Research output: Contribution to journalArticle

Open Access
14 Citations (Scopus)

Threshold choice for automatic spindle detection

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, Proceedings of the 19th International Conference on Systems, Signals and Image Processing (IWSSIP 2012). p. 197-200

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Two-sided discrete fractional derivatives and systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2012, AIP Conference Proceedings. p. 1416-1419

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
2 Citations (Scopus)
2011

ARMA Modelling of Sleep Spindles

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, IFIP Advances in Information and Communication Technology. p. 341-348

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
3 Citations (Scopus)
Open Access
12 Citations (Scopus)

Fractional Calculus for Scientists and Engineers

Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, Dordrecht: Springer. (Lecture Notes in Electrical Engineering; no. 84)

Research output: Book/ReportBook

Fractional signals and systems

Ortigueira, M. D., 1 Jan 2011, In : Signal Processing. 91, 3, p. 349-349

Research output: Contribution to journalBook/Film/Article review

Open Access
12 Citations (Scopus)
15 Citations (Scopus)

On a Unified Fractional Derivative

Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, Proceedings of the 7th International ASME/IEEE Conference on Mechatronics & Embedded Systems and Applications. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
1 Citation (Scopus)

On the fractional signals and systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, In : Signal Processing. 91, 3, p. 350-371

Research output: Contribution to journalArticle

Open Access
175 Citations (Scopus)

Sleep spindles: Decomposition, parameterization and applications

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, IEEE Conference on Signal Processing and Communications Applications (SIU). p. 1181-1184

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access

The causal fractional derivatives

Ortigueira, M. D., 2011, Fractional Calculus for Scientists and Engineers. Vol. 84 LNEE. p. 5-41 37 p. (Lecture Notes in Electrical Engineering; vol. 84 LNEE).

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

The Fractional Quantum Derivative and the Fractional Linear Scale Invariant Systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2011, Fractional Calculus for Scientists and Engineers. Berlin: Springer-Verlag, Vol. 84. p. 123-144 (Lecture Notes in Electrical Engineering).

Research output: Chapter in Book/Report/Conference proceedingChapter

Open Access
2010

A Contribution for the Automatic Sleep Classification Based on the Itakura-Saito Spectral Distance

Rodrigues, R. A. P., Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFIP Advances in Information and Communication Technology. p. 374-381

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
2 Citations (Scopus)

Are RL and C derivatives really useful?

Coito, F. J. A. V. D., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFAC-FDA. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fractional Filters: An Optimization Approach

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFIP Advances in Information and Communication Technology. Vol. 314. p. 361-366

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
4 Citations (Scopus)

Fractional Lower Order Moments in NMR: A New Measure of Tissue Complexity

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, International Symposium Mathematical Methods in Engineering. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Generalized GL, Caputo, and Riemann-Liouville derivatives for analytic functions

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, International Conference on Nonlinear Science and Complexity. p. 28-31

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Generalized GL Fractional Derivative and its Laplace and Fourier Transform

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, PROCEEDINGS OF ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE. p. 1227-1231

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)

MicroECG: An Integrated Platform for the Cardiac Arrythmia Detection and Characterization

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFIP Advances in Information and Communication Technology. Vol. 314. p. 367-373

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access

On a not so Fast Fourier Transform

Coito, F. J. A. V. D., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, -. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

On the Estimation of the Autocorrelation Function

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, In : Discussiones Mathematicae: Probability and Statistics. 38, NA, p. 85-97

Research output: Contribution to journalArticle

On the Fractional Linear Scale Invariant Systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, In : Ieee Transactions On Signal Processing. 58, 12, p. 6406-6410

Research output: Contribution to journalArticle

Open Access
6 Citations (Scopus)

Railscan: A Tool for the Detection and Quantification of Rail Corrugation

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFIP Advances in Information and Communication Technology. Vol. 314. p. 401-408

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
6 Citations (Scopus)

System initial conditions vs derivative initial conditions

Coito, F. J. A. V. D., Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, In : Computers & Mathematics With Applications. 59, 5, p. 1782-1789

Research output: Contribution to journalArticle

Open Access
37 Citations (Scopus)

The fractional quantum derivative and its integral representations

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, In : Communications In Nonlinear Science And Numerical Simulation. 15, 4, p. 956-962

Research output: Contribution to journalArticle

Open Access
15 Citations (Scopus)

The incremental ratio based causal Fractional Calculus for analytic functions

Ortigueira, M. D. & DEE Group Author, 1 Jan 2010, IFAC-FDA. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2009

Comments on “Modeling fractional stochastic systems as non-random fractional dynamics driven Brownian motions”

Ortigueira, M. D. & DEE Group Author, 1 Jan 2009, In : Applied Mathematical Modelling. 33, 5, p. 2534-2537

Research output: Contribution to journalArticle

Open Access
7 Citations (Scopus)

FILTERS: Fractional vs Integer order

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2009, -. p. -

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fractional Derivatives and Linear Systems

Ortigueira, M. D. & DEE Group Author, 1 Jan 2009, Mobile Computing Research and Applications. Nova Science Publishers, Inc., p. 219-269 (Computer Science, Technology and Application).

Research output: Chapter in Book/Report/Conference proceedingChapter

ON THE LINEAR SCALE FRACTIONAL SYSTEMS An Application of the Fractional Quantum Derivative

Ortigueira, M. D. & DEE Group Author, 1 Jan 2009, ICINCO 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON INFORMATICS IN CONTROL, AUTOMATION AND ROBOTICS. p. 196-202

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

The Empirical Mode Decomposition an Useful Tool for Signal Analysis

Batista, A. M. G., Ortigueira, M. D. & DEE Group Author, 1 Jan 2009, New Signal Processing Research. Nova Science Publishers, Inc., p. 455-475

Research output: Chapter in Book/Report/Conference proceedingChapter

30 Citations (Scopus)
2008

An introduction to the fractional continuous-time linear systems: The 21st century systems

Ortigueira, M. D., Sep 2008, In : IEEE Circuits and Systems Magazine. 8, 3, p. 19-26 8 p., 4609961.

Research output: Contribution to journalArticle

161 Citations (Scopus)

Fractional central differences and derivatives

Ortigueira, M. D., Sep 2008, In : JOURNAL OF VIBRATION AND CONTROL. 14, 9-10, p. 1255-1266 12 p.

Research output: Contribution to journalArticle

52 Citations (Scopus)

Identifying a transfer function from a frequency response

Valério, D., Ortigueira, M. D. & da Costa, J. S., Apr 2008, In : Journal Of Computational And Nonlinear Dynamics. 3, 2, 021207.

Research output: Contribution to journalArticle

55 Citations (Scopus)

Identifying a transfer function from a frequency response

Ortigueira, M. D., Valério, D. & Da Costa, J. S., 2008, 2007 Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, DETC2007. Vol. 5 PART B. p. 1405-1414 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

On the HHT, its problems, and some solutions

Rato, R. T., Ortigueira, M. D. & Batista, A. M. G., Aug 2008, In : Mechanical Systems and Signal Processing. 22, 6, p. 1374-1394 21 p.

Research output: Contribution to journalArticle

224 Citations (Scopus)

On the relation between the fractional Brownian motion and the fractional derivatives

Ortigueira, M. D. & Batista, A. M. G., 11 Feb 2008, In : Physics Letters. A, NA, p. 958-968 11 p.

Research output: Contribution to journalArticle

42 Citations (Scopus)
2007

New quasi-orthogonal BCH-derived sequences for CDMA applications

Ricardo, C. N. E., Ortigueira, M. D. & Gerald, J. A. B., Nov 2007, In : European Transactions on Telecommunications. 18, 7, p. 803-810 8 p.

Research output: Contribution to journalArticle

Potential dementia biomarkers based on the time-varying micro structure of sleep EEG spindles

Ktonas, P. Y., Golemati, S., Xanthopoulos, P., Sakkalis, V., Ortigueira, M. D., Tsekou, H., Zervakis, M., Paparrigopoulos, T. & Soldates, C. R., 2007, 29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07. p. 2464-2467 4 p. 4352827

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)