Dr Hua-Liang Wei
Lecturer in Medical Systems Engineering/Systems Biology

 
Address:
Dr H.L. Wei, BSc, MSc, PhD
Department of Automatic Control and Systems Engineering
University of Sheffield
Sheffield
S1 3JD
Tel: (+44) (0)114 222 5198(Office)
Fax: (+44) (0)114 222 5683
Email: w.hualiang @ sheffield.ac.uk
Room: D06, Amy Johnson Building

Teaching
Administration
Research Interests
Professional activities and recognition
Recent Publications

Teaching

• Data Modelling and Analysis (UG)
• Optimisation and Search (MEng)
• Optimisation and Search (MSc)
• Nonlinear Systems (MEng)
• State-Space, Optimal Control and Nonlinear Systems (MSc)

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Administration

• Year 2 tutor, ACSE
• Year 2 director, Faculty Biomedical Engineering (BME)
• Representative, Faculty BME course
• Coordinator, Department-Library liaison
• Member, Departmental Learning and Teaching Committee
• Member, Departmental Student Affairs Committee
• Member, Departmental Examinations Board
• Member, Faculty BME Board
• Member, Faculty BME Examinations Board

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Research Interests

• Identification and modelling for complex nonlinear systems including
  
  • NARMAX methodology and applications.
  • Artificial neural networks (ANN), radial basis function networks (RBFN), wavelet neural networks and multiresolution wavelet models, computational statistics, machine learning.
  • Regression analysis, nonlinear optimization and computational intelligence.
  • Non-stationary (time varying) system identification and modelling.
  • Spatio-temporal system identification and modelling.
• Bioscience signal processing and data modelling including
  
  • Neurophysiology and neuro-imaging data modelling and analysis.
  • EEG, fMRI and ECG data processing, modelling and analysis.
  • Data based classification, pattern recognition, anomaly detection, with applications in clinical and medical diagnosis and prognosis.
• Forecasting and analysis of complex stochastic dynamical processes with applications in
  
  • Space weather systems.
  • Environmental systems.
  • Computational economics and finance.
• New concepts and methodologies developments for the identification and analysis of nonlinear systems.
• Applications and developments of signal processing, system identification and data modelling to control engineering, bioengineering, neuroscience, systems/synthetic biology, environments, space weather and other emerging areas.

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Grants

EPSRC Platform Grant, S A Billings, V Kadirkamanathan, Z Q Lang, D Coca, M Balikhin, H L Wei, `System Identification and Information Processing for Complex Systems´, 04.01.2010 to 03.01.2015, £1,205,632

Royal Society Collaboration Grant, V. Kadirkamanathan and H. L. Wei, `Investigation of the control mechanism on co-culture bioethanol producing system´, 2010-2012, £11,950


EPSRC, H L Wei, `System Identification and Data Modelling of Complex Nonlinear and Nonstationary Processes´, 04.01.2011 to 31.03.2012, £101,004

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Professional activities and recognition

• Chair, Programme Committee - ICNC’10 (the 6th International Conference on Natural Computation 2010), Yantai, China, August 10-12, 2010.
• Programme Committee member for a number of international conferences.
• Reviewer for many international journals.
• Reviewer for many international conferences.

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Publications

2011

2. Li, L., Wei, H. L., Billings, S. A., and Sarrigiannis, P. G., "Time-varying model identification for time– frequency feature extraction from EEG data", Journal of Neuroscience Methods, 196(1), pp.151-158, 2011. DOI: 10.1016/j.jneumeth.2010.11.027.
3. Wei, H. L., Billings, S. A., Sharma, A. S., Wing, S., Boynton, R. J., and Walker, S. N., "Forecasting Relativistic Electron Flux Using Dynamic Multiple Regression Models", Annales Geophysicae, 29, pp415-420. DOI: 10.5194/angeo-29-415-2011.
   [PDF] http://www.ann-geophys.net/29/415/2011/angeo-29-415-2011.pdf
4. Li, Y., Wei, H. L., and Billings, S. A., "Identification of time-varying systems using multi-wavelet basis functions," IEEE Transactions on Control Systems Technology, DOI: 10.1109/TCST.2010.2052257, in press.

2010

5. Balikhin, M.A., Boynton, R.J., Billings, S. A., Gedalin, M., Ganushkina, N., Coca, D., and Wei, H.L., "Data based quest for solar wind-magnetosphere coupling function", Geophysical Research Letters, 37, L24107, 2010. DOI: 10.1029/2010GL045733.
6. 5. Wei, H. L., Billings, S. A., Zhao, Y., and Guo, L. Z., "An adaptive wavelet neural network for spatio-temporal system identification", Neural Networks, 23(10), pp.1286-1299, 2010. DOI: 10.1016/j.neunet.2010.07.006
   [PDF] http://linkinghub.elsevier.com/retrieve/pii/S0893608010001450
7. Wei, H. L., Billings, S. A. and Liu, J.,, "Time-varying parametric modelling and time-dependent spectral characterisation with applications to EEG signals using multi-wavelets", Int. J. Modelling, Identification and Control, 9(3), pp.215-224, 2010.
   [PDF] http://inderscience.metapress.com/index/GX482842150756R5.pdf

2009

8. Wei, H. L., Billings, S. A., Zhao, Y., and Guo, L. Z., "Lattice dynamical wavelet neural networks implemented using particle swarm optimization for spatio-temporal system identification", IEEE Trans. Neural Networks, 20(1), pp. 181-185, 2009. DOI: 10.1109/TNN.2008.2009639
   [PDF] http://eprints.whiterose.ac.uk/8553/2/Weihl3pdf.pdf
9. Wei, H. L. and Billings, S. A., "Improved model identification for nonlinear systems using a random subsampling and multiple modelling (RSMM) approach", Int. J. Control, 82(1), pp. 27-42, 2009. DOI: 10.1080/00207170801955420
10. Wei, H. L. and Billings, S. A., "Improved parameter estimates for non-linear dynamical models using a bootstrap method", Int. J. Control, 82(11), pp. 1991-2001, 2009. DOI: 10.1080/00207170902854118
11. Wei, H. L., Zheng, Y., Pan, Y., Coca, D., Li, L. M., Mayhew, J. E. W., and Billings, S. A., "Model estimation of cerebral hemodynamics between blood flow and volume changes: A data-based modeling approach", IEEE Trans. Biomedical Engineering, 56(6), pp. 1606-1616, 2009. DOI: 10.1109/TBME.2009.2012722
    [PDF] http://eprints.whiterose.ac.uk/8553/2/Weihl3pdf.pdf
    http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4760267
12. Wei, H. L. and Billings, S. A., "Power-law behaviour evaluation from foreign exchange market data using a wavelet transform method", Physics Letters A, 373(37), pp3324-3329. DOI: 10.1016/j.physleta.2009.07.047
    [PDF} http://eprints.whiterose.ac.uk/9828/1/Wei1.pdf
    http://linkinghub.elsevier.com/retrieve/pii/S0375960109008494

2008

13. Billings, S. A. and Wei, H. L., "An adaptive orthogonal search algorithm for model subset selection and nonlinear system identification", Int. J. Control, 81(5), pp.714-724, 2008. DOI: 10.1080/00207170701216311
    [PDF] http://eprints.whiterose.ac.uk/8555/2/weihl4.pdf
14. Wei, H. L. and Billings, S. A., "Model structure selection using an integrated forward orthogonal search algorithm assisted by squared correlation and mutual information", Int. J. Modelling, Identification and Control, 3(4), pp. 341-356, 2008. DOI: 10.1504/IJMIC.2008.020543
    [PDF] http://eprints.whiterose.ac.uk/8554/2/Weihl5.pdf
    http://inderscience.metapress.com/index/C2T43L7231756852.pdf
15. Wei, H. L., Lang, Z. Q., and Billings, S. A., "Constructing an overall dynamical model for a system with changing design parameter properties", Int. J. Modelling, Identification and Control, 5(2), pp. 93-104, 2008. DOI: 10.1504/IJMIC.2008.022014
    [PDF] http://eprints.whiterose.ac.uk/8550/2/weihl2.pdf
    http://inderscience.metapress.com/index/0745142R32WQ5782.pdf
16. Wei, H. L. and Billings, S. A., "Generalized cellular neural networks (GCNNs) constructed using particle swarm optimization for spatio-temporal evolutionary pattern identification", Int. J. Bifurcation and Chaos, 18(12), pp. 3611-3624, 2008. DOI: 10.1142/S0218127408022585
    [PDF] http://linkinghub.elsevier.com/retrieve/pii/S0893608007001876

2007

17. Billings, S. A. and Wei, H. L., "Sparse model identification using a forward orthogonal regression algorithm aided by mutual information", IEEE Trans. Neural Networks, 18(1), pp. 306-310, 2007. DOI: 10.1109/TNN.2006.886356
    [PDF] http://eprints.whiterose.ac.uk/1970/1/weihl5_IEEE2007-TNN-18%281%29p306-310w.pdf
18. Billings, S. A., Wei, H. L. and Balikhin, M. A., "Generalised multiscale radial basis function networks", Neural Networks, 20(10), pp.1081-1094, 2007. DOI: 10.1016/j.neunet.2007.09.017
    [PDF] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.114.7234&rep=rep1&type=pdf
    http://eprints.whiterose.ac.uk/1947/1/weihl3.pdf
    Wei, H.L., Lang, Z. Q. and Billings, S. A., `An algorithm for determining the output frequency range of Volterra models with multiple inputs´, IEEE Trans. Circuits and Systems-II. Express Briefs, 54(6), pp532-536, 2007. DOI: 10.1109/TCSII.2007.894426
    [PDF] http://eprints.whiterose.ac.uk/2666/1/langzq3.pdf
    http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4237378
19. Wei, H. L., Zhu, D. Q., Billings, S. A., and Balikhin, M. A., "Forecasting the geomagnetic activity of the Dst index using multiscale radial basis function networks", Advances in Space Research, 40(12), pp.1863-1870, 2007. DOI: 10.1016/j.asr.2007.02.080
    [PDF] http://linkinghub.elsevier.com/retrieve/pii/S0273117707002086
20. Wei, H. L. and Billings, S. A., " A comparative study on global wavelet and polynomial models for non-linear regime-switching systems", Int. J. Modelling, Identification and Control, 2(4), pp. 273-282, 2007. DOI: 10.1504/IJMIC.2007.016410
    [PDF] http://eprints.whiterose.ac.uk/8549/2/weihl1.pdf

2006

23. Billings, S. A., Guo, L. Z., and Wei, H. L., "Identification of coupled map lattice models for spatio-temporal patterns using wavelets", Int. J. Syst. Sci., 37(14), pp.1021-1038, 2006. DOI: 10.1080/00207720600963015
24. Guo, L. Z., Billings, S. A., and Wei, H. L., "Estimation of spatial derivatives and identification of continuous spatio-temporal dynamical systems", Int. J. Control, 79(9), pp.1118-1135, 2006. DOI: 10.1080/00207170600804050
25. Wei, H. L. and Billings, S. A., "Long term prediction of non-linear time series using multiresolution wavelet models", Int. J. Control., 79(6), pp. 569-580, 2006. DOI: 10.1080/00207170600621447
    [PDF] http://pdfserve.informaworld.com/407867_928381271_746049273.pdf
26. Wei, H. L., Billings, S. A., and Balikhin, M. A., "Wavelet based nonparametric NARX models for nonlinear input-output system identification", Int. J. Syst. Sci., 37(15), pp.1089-1096, 2006. DOI: 10.1080/00207720600903011
27. Wei, H. L. and Billings, S. A., "An efficient nonlinear cardinal B-spline model for high tide forecasts at the Venice Lagoon", Nonlinear Processes in Geophysics, 13(5), pp.577-584.
    [PDF] http://eprints.whiterose.ac.uk/1945
    http://www.nonlin-processes-geophys.net/13/577/2006/npg-13-577-2006.html

2005

28. Billings, S. A. and Wei, H. L., "A new class of wavelet networks for nonlinear system identification", IEEE Trans. Neural Networks, 16(4), pp. 862-874, 2005. DOI: 10.1109/TNN.2005.849842
    [PDF] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.114.7234&rep=rep1&type=pdf
    http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1461429
29. Billings S. A. and Wei H. L., "The wavelet-narmax representation: A hybrid model structure combining polynomial models with multiresolution wavelet decompositions", Int. J. Syst. Sci., 36(3), pp. 137-152, 2005. DOI: 10.1080/00207720512331338120
    [PDF] http://eprints.whiterose.ac.uk/1972/1/weihl6_IJSS2005-36%283%29p137-152w.pdf

2004

30. Wei, H. L., Billings, S. A., and Balikhin, M., "Prediction of the Dst index using multiresolution wavelet models", J. Geophysical Research-Space Physics, 109(A7), Art. No. A07212, 2004. DOI: 10.1029/2003JA010332
31. Wei, H. L., Billings, S. A., and Balikhin, M., "Analysis of the geomagnetic activity of the Dst index and self-affine fractals using wavelet transforms", Nonlinear Processes in Geophysics, 11(3), pp. 303-312, 2004.
    [PDF] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.98.7301&rep=rep1&type=pdf
32. Wei, H. L., Billings, S. A., and Liu, J., "Term and variable selection for nonlinear system identification", Int. J. Control, 77(1), pp.86-110, 2004. DOI: 10.1080/00207170310001639640
33. Wei, H. L. and Billings, S. A., "A unified wavelet-based modelling framework for nonlinear system identification: the WANARX model structure", Int. J. Control, 77(4), pp.351-366, 2004. DOI: 10.1080/0020717042000197622
    [PDF] http://eprints.whiterose.ac.uk/1974/1/weihl8_IJC2004-77%284%29p351-366w.pdf
34. Wei, H. L. and Billings, S. A., "Identification and reconstruction of chaotic systems using multiresolution wavelet decompositions", Int. J. Systems Science, 35(9), pp. 511-526, 2004. DOI: 10.1080/00207720412331285850

2002

35. Wei, H. L. and Billings, S. A., "Identification of time-varying systems using multiresolution wavelet models", Int. J. Syst. Sci., 33(15), pp. 1217-1228, 2002. DOI: 10.1080/0020772031000081982
    [PDF] http://eprints.whiterose.ac.uk/archive/00001973/01/weihl7_IJSS2005-33(15)p1217-1228w.pdf
    http://www.ingentaconnect.com/content/tandf/tsys/2003/00000033/00000015/art00005

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