Healthcare data mining: predicting inpatient length of stay

Intelligent analysis of acute bed overflow in a tertiary hospital in Singapore
Teow, K.L., El-Darzi, E., Foo, C., Jin, X. and Sim, J. 2012. Intelligent analysis of acute bed overflow in a tertiary hospital in Singapore. Journal of Medical Systems. 36 (3), pp. 1873-1882. https://doi.org/10.1007/s10916-010-9646-1

A statistical framework for evaluating neural networks to predict recurrent events in breast cancer
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2010. A statistical framework for evaluating neural networks to predict recurrent events in breast cancer. International Journal of General Systems. 39 (5), pp. 471-488. https://doi.org/10.1080/03081079.2010.484282

Applying granular computing theories to system modelling with optimised development process
Huang, W. and Liu, P. 2010. Applying granular computing theories to system modelling with optimised development process. in: 5th IEEE International Conference on Intelligent Systems (IEEE-IS 2010), London, England, United Kingdom, July 7-9, 2010 London Springer. pp. 207-211

Patient grouping optimization using a hybrid self-organizing map and Gaussian mixture model for length of stay-based clustering system
Gorunescu, F., Belciug, S., El-Darzi, E. and Gorunescu, M. 2010. Patient grouping optimization using a hybrid self-organizing map and Gaussian mixture model for length of stay-based clustering system. in: 5th IEEE International Conference on Intelligent Systems (IS 2010) proceedings IEEE . pp. 173-178

Evaluating alternative surgery plans with discrete-event simulation model
Fei, H., Meskins, N. and El-Darzi, E. 2010. Evaluating alternative surgery plans with discrete-event simulation model. in: 2010 IEEE Workshop on Health Care Management (WHCM), Italy, 18-20 February 2010 IEEE . pp. 1-6

A partially connected neural network-based approach with application to breast cancer detection and recurrence
Belciug, S. and El-Darzi, E. 2010. A partially connected neural network-based approach with application to breast cancer detection and recurrence. in: 5th IEEE International Conference on Intelligent Systems (IS 2010) proceedings IEEE . pp. 191-196

Support vector machine learning with an evolutionary engine
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. Support vector machine learning with an evolutionary engine. Journal of the Operational Research Society. 60 (8), pp. 1116-1122. https://doi.org/10.1057/jors.2008.124

An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy. in: Abraham, A., Hassanien, A.E., Patrick, S. and Andries, E. (ed.) Foundations of computational intelligence Berlin Heidelberg Springer.

An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy
Stoean, R., Preuss, M., Stoean, C., El-Darzi, E. and Dumitrescu, D. 2009. An evolutionary approximation for the coefficients of decision functions within a support vector machine learning strategy. in: Hassanien, A.E., Abraham, A., Vasilakos, A.V. and Pedrycz, W. (ed.) Foundations of computational intelligence Berlin Heidelberg Springer.

Using Granular Computing theories for service-oriented systems analysis and design
Huang, W. and El-Darzi, E. 2009. Using Granular Computing theories for service-oriented systems analysis and design. in: IEEE International Conference on Granular Computing (GrC 2009), Nanchang, China, August 17-19, 2009 IEEE . pp. 264-267

Clustering patient length of stay using mixtures of Gaussian models and phase type distributions
Garg, L., McClean, S.I., Meenan, B., El-Darzi, E. and Millard, P.H. 2009. Clustering patient length of stay using mixtures of Gaussian models and phase type distributions. in: Proceedings of the 22nd IEEE International Symposium on Computer-Based Medical Systems (CBMS 2009) IEEE . pp. 1-7

Performance analysis of ambulatory services using dicrete event simulation
Fei, H., Meskins, N. and El-Darzi, E. 2009. Performance analysis of ambulatory services using dicrete event simulation. in: Proceedings of the International Conference on Industrial Engineering and Systems Management (IESM' 2009), May 13-15, Montreal, Canada WASET.

Length of stay-based clustering methods for patient grouping
El-Darzi, E., Abbi, R., Vasilakis, C., Gorunescu, F., Gorunescu, M. and Millard, P.H. 2009. Length of stay-based clustering methods for patient grouping. in: McClean, S.I., Millard, P.H., El-Darzi, E. and Nugent, C. (ed.) Intelligent patient management Berlin Heidelberg Springer.

A decision support system for measuring and modelling the multi-phase nature of patient flow in hospitals
Vasilakis, C., El-Darzi, E. and Chountas, P. 2008. A decision support system for measuring and modelling the multi-phase nature of patient flow in hospitals. in: Chountas, P., Petrounias, I. and Kacprzyk, J. (ed.) Intelligent techniques and tools for novel system architectures Berlin Heidelberg Springer.

A statistical evaluation of neural computing approaches to predict recurrent events in breast cancer
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2008. A statistical evaluation of neural computing approaches to predict recurrent events in breast cancer. in: Proceedings of the 4th International IEEE Conference on Intelligent Systems IS'08. Varna, Bulgaria, September, 6-8 2008 Los Alamitos, USA IEEE .

Length of stay based grouping and classification methodology for modelling patient flow
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. Length of stay based grouping and classification methodology for modelling patient flow. Journal of Operations and Logisitics. 2 (2), pp. 1-9.

A Gaussian mixture model approach to grouping patients according to their hospital length of stay
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. A Gaussian mixture model approach to grouping patients according to their hospital length of stay. in: Proceedings of the 21st IEEE International Symposium on Computer-Based Medical Systems (CBMS '08) IEEE . pp. 524-529

Analysis of stopping criteria for the EM algorithm in the context of patient grouping according to length of stay
Abbi, R., El-Darzi, E., Vasilakis, C. and Millard, P.H. 2008. Analysis of stopping criteria for the EM algorithm in the context of patient grouping according to length of stay. in: Proceedings of the 4th International IEEE Conference on Intelligent Systems IS'08. Varna, Bulgaria, September, 6-8 2008 Los Alamitos, USA IEEE .

Applying data mining algorithms to inpatient dataset with missing values
Liu, P., El-Darzi, E., Lei, L., Vasilakis, C., Chountas, P. and Huang, W. 2008. Applying data mining algorithms to inpatient dataset with missing values. Journal of Enterprise Information Management. 21 (1), pp. 81-92. https://doi.org/10.1108/17410390810842273

Generalized Net Model for Outpatient Care in Bulgaria
Tasseva, V., Peneva, D., Atanassov, K.T., El-Darzi, E., Chountas, P. and Vasilakis, C. 2007. Generalized Net Model for Outpatient Care in Bulgaria. in: Proc of Twentieth IEEE International Symposium on Computer-Based Medical Systems, 2007. CBMS '07. IEEE . pp. 701

Extending the gaia methodology for the design and development of agent-based software systems
Huang, W., El-Darzi, E. and Jin, L. 2007. Extending the gaia methodology for the design and development of agent-based software systems. in: Proceedings of the 31st Annual IEEE International Computer Software and Applications Conference (COMPSAC 2007), Peking (Beijing), China, July 23-27 2007 Los Alamitos, USA IEEE .

An OLAP-enabled software environment for modelling patient flow
Vasilakis, C., El-Darzi, E. and Chountas, P. 2006. An OLAP-enabled software environment for modelling patient flow. in: Proceedings of the 3rd International IEEE Conference on Intelligent Systems Los Alamitos, USA IEEE . pp. 261-266

Agent-based models for community care systems analysis and design
Huang, W., El-Darzi, E., Chountas, P. and Liu, P. 2006. Agent-based models for community care systems analysis and design. in: Proceedings of the 3rd IEEE International Conference on Intelligent Systems (IS-2006) Los Alamitos, USA IEEE . pp. 278-283

Length of stay-based patient flow models: recent developments and future directions
Marshall, A.H., Vasilakis, C. and El-Darzi, E. 2005. Length of stay-based patient flow models: recent developments and future directions. Health Care Management Science. 8 (3), pp. 213-220. https://doi.org/10.1007/s10729-005-2012-z

Generalized net model with intuitionistic fuzzy estimations of the process of obtaining of scientific titles and degrees
Shannon, A., Riecan, B., Langova-Orozova, D., El-Darzi, E., Kerre, E., Sotirova, E., Gorunescu, F., Petrounias, I., Trelewicz, J., Atanassov, K.T., Krawczak, M., Chountas, P., Melo-Pinto, P., Georgiev, P., Kim, T. and Tasseva, V. 2005. Generalized net model with intuitionistic fuzzy estimations of the process of obtaining of scientific titles and degrees. Notes on Intuitionistic Fuzzy Sets. 11, pp. 95-114.

A breast cancer diagnosis system: a combined approach using rough sets and probabilistic neural networks
Revett, K., Gorunescu, F., Gorunescu, M., El-Darzi, E. and Ene, M. 2005. A breast cancer diagnosis system: a combined approach using rough sets and probabilistic neural networks. in: EUROCON 2005: the International Conference on "Computer as a Tool": Belgrade, Serbia and Montenegro, November 21-24 2005 London, UK IEEE .

Intuitionistic fuzzy generalised nets in modelling web usage patterns indentification
Petrounias, I., Tseng, A., Chountas, P., El-Darzi, E. and Kodogiannis, V. 2005. Intuitionistic fuzzy generalised nets in modelling web usage patterns indentification. Notes on Intuitionistic Fuzzy Sets. 11 (4), pp. 123-129.

A feature selection procedure and its application in health care
Liu, P., El-Darzi, E., Vasilakis, C., Chountas, P., Huang, W. and Zhu, J. 2005. A feature selection procedure and its application in health care. Craiova Medical Journal.

An analysis of missing data treatment methods and their application to health care dataset
Liu, P., El-Darzi, E., Lei, L., Vasilakis, C., Chountas, P. and Huang, W. 2005. An analysis of missing data treatment methods and their application to health care dataset. in: Li, X., Wang, S. and Dong, Z.Y. (ed.) Advanced Data Mining and Applications: First International Conference, ADMA 2005, Wuhan, China, July 22-24, 2005: proceedings Berlin, Germany Springer.

A heuristic approach in hepatic cancer diagnosis using a probabilistic neural network-based model
Gorunescu, M., Gorunescu, F., Ene, M. and El-Darzi, E. 2005. A heuristic approach in hepatic cancer diagnosis using a probabilistic neural network-based model. in: Janssen, J. and Lenca, P. (ed.) Applied Stochastic Models and Data Analysis Brest, France ENST Bretagne. pp. 1016-1025

A hybrid approach to cancer classification: rough sets and probabilistic neural networks
Gorunescu, F., Gorunescu, M., El-Darzi, E., Gorunescu, S., Revett, K. and Khan, A. 2005. A hybrid approach to cancer classification: rough sets and probabilistic neural networks. in: The First East European Conference on Health Care Modelling and Computation (HCMC 2005). Craiova, Romania, August 31st - September 2nd, 2005 Craiova, Romania Universitatea din Craiova. pp. 149-159

An evolutionary computational approach to probabilistic neural network with application to hepatic cancer diagnosis
Gorunescu, F., Gorunescu, M., El-Darzi, E. and Gorunescu, S. 2005. An evolutionary computational approach to probabilistic neural network with application to hepatic cancer diagnosis. in: Tsymbal, A. and Cunningham, P. (ed.) 18th IEEE Symposium on Computer-Based Medical Systems, 2005: proceedings USA IEEE . pp. 461-466

Representation of factual and temporal unawareness in electronic patient records
Chountas, P., Petrounias, I., El-Darzi, E. and Kodogiannis, V. 2005. Representation of factual and temporal unawareness in electronic patient records. Journal of Computational Methods in Sciences and Engineering. 5 (4), pp. 243-261.

A data warehouse environment for storing and analyzing simulation output data
Vasilakis, C., El-Darzi, E. and Chountas, P. 2004. A data warehouse environment for storing and analyzing simulation output data. in: Ingalls, R.G., Rossetti, M.D., Smith, J.S. and Peters, B.A. (ed.) Proceedings of the 2004 Winter Simulation Conference USA IEEE .

Comparative analysis of data mining algorithms for predicting inpatient length of stay
Liu, P., El-Darzi, E., Vasilakis, C., Chountas, P., Huang, W. and Lei, L. 2004. Comparative analysis of data mining algorithms for predicting inpatient length of stay. Pacific Asia Conference on Information Systems 2004. Bangkok, Thailand 07-10 Jul 2005

Developing an agent oriented emergency service system with AUML and gaia methodology
Huang, W., El-Darzi, E. and Beer, M.D. 2004. Developing an agent oriented emergency service system with AUML and gaia methodology. in: Proceedings of the International Conference on Computer, Communication and Control Technologies (CCCT '04), University of Texas, U.S.A, August 14-17, 2004 USA IEEE . pp. 244-252

On uncertainty and data-warehouse design
Chountas, P., Petrounias, I., Vasilakis, C., Tseng, A., El-Darzi, E., Atanassov, K.T. and Kodogiannis, V. 2004. On uncertainty and data-warehouse design. in: Yakhno, T. (ed.) Advances in Information Systems: Third International Conference, ADVIS 2004, Izmir, Turkey, October 20-22, 2004: proceedings Berlin, Germany Springer.

Temporality and intuitionistic fuzzy data warehouses
Chountas, P., Petrounias, I., Vasilakis, C., El-Darzi, E., Tseng, A., Kolev, B., Kodogiannis, V. and Georgiev, P. 2004. Temporality and intuitionistic fuzzy data warehouses. Notes in Intuitionistic Fuzzy Sets. 10 (4), pp. 47-55.

Temporality and intuitionistic fuzzy data warehouses
Chountas, P., Petrounias, I., Vasilakis, C. and El-Darzi, E. 2004. Temporality and intuitionistic fuzzy data warehouses. Notes on Intuitionistic Fuzzy Sets. 10 (4), pp. 47-55.

Data cube modelling and OLAP algebra for hospital length of stay analysis
Vasilakis, C., El-Darzi, E. and Chountas, P. 2003. Data cube modelling and OLAP algebra for hospital length of stay analysis. Craiova Medicala Journal: Proceedings of The 1st MEDINF International Conference on Medical Informatics & Engineering. 5 (3), pp. 509-512.

Representation and modelling of electronic patient records
Sivagurunathan, K., Chountas, P. and El-Darzi, E. 2003. Representation and modelling of electronic patient records. in: Proceedings of the International Conference of Computational Methods in Sciences and Engineering 2003 (ICCMSE 2003): Kastoria, Greece, September 12-16 New Jersey, USA World Scientific Publishing. pp. 598-603

Data warehouses-TOLAP-decision making
Chountas, P., Vasilakis, C., El-Darzi, E., Petrounias, I. and Tseng, A. 2003. Data warehouses-TOLAP-decision making. in: IEEE International Conference on Systems, Man and Cybernetics, 2003 USA IEEE .

Representation of temporal unawareness
Chountas, P., Petrounias, I., Atanassov, K.T., Kodogiannis, V. and El-Darzi, E. 2002. Representation of temporal unawareness. in: Yakhno, T. (ed.) Advances in Information Systems: Second International Conference, ADVIS 2002, Izmir, Turkey, October 23-25 London, UK Springer.

Representation and querying of temporal conflict
Chountas, P., Petrounias, I., Atanassov, K.T., Kodogiannis, V. and El-Darzi, E. 2002. Representation and querying of temporal conflict. in: Troels, A. (ed.) Flexible query answering systems: 5th International Conference, FQAS 2002, Copenhagen, Denmark, October 2002 London, UK Springer.

A simulation study of the winter bed crisis
Vasilakis, C. and El-Darzi, E. 2001. A simulation study of the winter bed crisis. Health Care Management Science. 4 (1), pp. 31-36. https://doi.org/10.1023/A:1009649615548

The LH5 model for data mining
El-Darzi, E. and Parapadakis, D. 2001. The LH5 model for data mining. First International Conference of Electronic Business. Hong Kong 19-21 Dec 2001 pp. 467-478

Editorial: Modelling the process of care
Chaussalet, T.J. and El-Darzi, E. 2001. Editorial: Modelling the process of care. Health Care Management Science. 4 (1), p. 5. https://doi.org/10.1023/A:1009659711914