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)
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
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.
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
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.
Publications
2011
- 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.
- 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 - 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
- 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.
- 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 - 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
- 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 - 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
- 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
- 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 - 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
- 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 - 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 - 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 - 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
- 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 - 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 - 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 - 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
- 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
- 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
- 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 - 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
- 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
- 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 - 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
- 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
- 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 - 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
- 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 - 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
- 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
