Emeritus Faculty, Chemical Engineering

Please visit following page

https://chemeng.queensu.ca/people/Faculty/ThomasHarris/files/CvHarrisMay2018.pdf

**Research Interests**

- Process Control
- Process Monitoring and Controller Performance Assessment
- Statistical Methods in Chemical Engineering

Professor Harris' activities are directed towards the analysis of process control strategies and the development and use of statistical methodologies in chemical engineering. Current projects include the use of nonparametric and parametric statistical methods for structural and performance analysis, development of performance analysis tools to account for process nonlinearities and the use of generalized profiling and Markov Chain Monte Carlo (MCMC) methods to provide meaningful uncertainty analysis of process models that are used for control and analysis purposes.

**Articles in Refereed Journals**

Harris, T.J. and Wei-Yu, (2012), Variance decompositions of nonlinear time series using stochastic simulation and sensitivity analysis, Statistics and Computing 22, pp. 387-396

Wu, S., McLean, K., Harris, T.J., and K.B. McAuley*, (2011), Selection of Optimal Parameter Set Using Estimability Analysis and MSE-based Model-Selection Criterion, International Journal of Advanced Mechatronic Systems 3, pp. 188-197.

Wu, S., McAuley,K.B. and T.J. Harris (2011), Selection of Simplified Models: II. Development of a Model Selection Criterion Based on Mean-Squared Error, Can. J. Chem. Eng. 89, pp. 325-336

Wu, S., McAuley, K.B. and T.J. Harris* (2011), Selection of Simplified Models: I. Analysis of Model Selection Criteria using Mean-Squared Error, Can. J. Chem. Eng. 89, pp. 148-158

Harris, T.J.* and Yuan, H., (2010), Filtering and frequency interpretations of Singular Spectrum Analysis , Physica D: Nonlinear Phenomena 239, pp.1958-1967

Harris, T.J.* and Wei-Yu (2010) , Variance Decomposition of Nonlinear Dynamic Stochastic Systems, Journal of Process Control 20, pp. 195-205.

Harris, T.J.* and Wei-Yu (2009), Parameter Uncertainty Effects on Variance-based Sensitivity Analysis, Reliability Engineering and System Safety, 94, 596-603

Harris, T.J.*, Interpretations of Multivariate Performance Indices (2009), Journal of Process Control, 19, pp 701-710

Wu, S., Harris, T.J.* and K.B. McAuley (2007), The Use of Simplified or Misspecified Models, Canadian Journal of Chemical Engineering 54, pp. 386-398.

Harris, T.J.* and Wei-Yu (2007), Controller Assessment for a Class of Nonlinear Systems, Journal of Process Control 17, pp. 607-619

Quinn, S.L., Harris,T.J.* and D.W. Bacon (2005), Measuring Uncertainty in Control-Relevant Statistics, Journal of Process Control, 15, pp. 675-690

Harris, T.J.* (2004), Statistical Properties of Quadratic-Type Performance Indices, Journal of Process Control, 14, 899-914

Wei-Yu and T.J. Harris* (2003), Analysis of Multivariable Controllers Using Markov Chains, International Journal of Adaptive Control and Signal Processing, 17, 569-588

Seppala, C.T., Harris, T.J*., and D.W. Bacon (2002), Time Series Methods for Dynamic Analysis of Multiple Controlled Variables, Journal of Process Control, 12, pp 257-276

Quinn, S.L., Bacon, D.W., and T.J. Harris* (2000), Notes on Likelihood Intervals and Profiling, Communications in Statistics 29, pp. 108-130

Quinn, S.L., Bacon, D.W., and T.J. Harris* (1999), Using Generalized Profiling to Estimate Likelihood Intervals for Model Predictions and Other Functions of Model Parameters, Canadian Journal of Chemical Engineering, 77, pp 723-737.

Harris, T.J.*, Seppala, C.T., and L.D. Desborough (1999), A Review of Performance Monitoring and Assessment Techniques for Univariate and Multivariate Control Systems, Journal of Process Control, 9, pp 1-17

Harris, T.J.*, Wilkinson, R., and J. Davis (1998), Numerical Inversion of Characteristic Equations with Applications to Quadratic Forms in Normal Variables, Communications in Statistics: Simulation and Computation, 27, pp 215-228

Harris, T.J.*, Seppala, C.T., Jofriet, P.J., and B.W. Surgenor (1996), Plant-Wide Feedback Control Performance Assessment Using an Expert-system Framework, Control Eng. Practice, 4, pp. 1297-1303

Jofriet, P., Seppala, C., Surgenor, B. and T. J. Harris* (1996), An Expert system For Control Loop Performance, Pulp & Paper Canada, 97 , pp. 207-211

Harris, T.J.*, Boudreau, T., and J.F. MacGregor (1996), Performance Assessment of Multivariable Feedback Controllers, Automatica, 32, pp. 1505-1518

Piette, R., Harris, T.J., and P.J. McLellan* (1995), Graphical Interpretation of Steady State Interaction Measures, Industrial & Engineering Chemistry Research, 34, pp. 4436-4450

Amphlett, J.C.*, Baumert, R.M., Mann, R.F., Peppley, B.A., Roberge, P.R., and T.J. Harris (1995), Performance Modeling of the Ballard Mark IV Solid Polymer Electrolyte Fuel Cell, I. Mechanistic Model Development, J. Electroch. Soc., 142, pp. 1-8

Amphlett, J.C.*, Baumert, R.M., Mann, R.F., Peppley, B.A., Roberge, P.R., and T.J. Harris (1995), Performance Modeling of the Ballard Mark IV Solid Polymer Electrolyte Fuel Cell, II. Empirical Model Development, J. Electroch. Soc., 142, pp. 9-15

Yuet, P.K., Harris, T.J., and M.F.A. Goosen* (1995), Mathematical Modelling of Immobilized Animal Cell Growth, Biomaterials, Artificial Cells, and Immobilization Biotechnology, 23, pp. 109-133

Shirt, R.W., Harris, T.J.*, and D.W. Bacon (1994), Experimental Design Considerations for Dynamic Considerations, Ind. Eng. Chem. Res. 33, pp. 2656-2667

Desborough, L.D., and T.J. Harris* (1994), Control Performance Assessment, Pulp & Paper Canada 94:11, pp. 441-443

McAuley, K.B., Talbot, J.P., and T.J. Harris*, (1994), A Comparison of Two-Phase and Well-Mixed Models for Fluidized-Bed Polyethylene Reactors, Chem. Eng. Sci. 49, pp. 2035-2045.

Desborough, L.D. and T.J. Harris* (1993), Performance Assessment Measures for Univariate Feedforward/Feedback Control, Canadian Journal of Chemical Engineering, 71,.605-616

Berg, D. and T.J. Harris* (1993), Characterization of Multicomponent Diffusion Effects in MTBE Synthesis, I&EC Research, 32, 2147-2158

Harris, T.J., and J.F. MacGregor* (1993), The Exponentially Weighted Moving Variance, Journal of Quality Technology, 25 106-118

Desborough, L. and T.J. Harris* (1992), Normalized Performance Measures for Feedback Controllers, Canadian Journal of Chemical Engineering, 70, pp. 1186-1197

Harris, T.J.* and J.H. Davis (1992), An Iterative Method for Matrix Spectral Factorization, SIAM Journal of Statistical and Scientific Computing, 13, pp. 531-540

Harris, T.J.* (1992), One Step Optimal Controllers for Nonsymmetric and Nonquadratic Cost Functions, Technometrics, 34, pp. 298-306

Foley, M. and T.J. Harris* (1992), Performance and Structure of H¥ Controllers, Journal of Optimal Control: Applications & Methods, 13, pp. 1-28

Harris, T.J.* and W.H. Ross (1991), Statistical Process Control Procedures for Correlated Observations, Canadian Journal of Chemical Engineering, 69, pp. 48-57

Kwok, W.Y., Kiparissides, C., Yuet, P., Harris, T.J. and M.F.A. Goosen* (1991), Mathematical Modelling of Protein Diffusion in Microcapsules: A Comparison with Experimental Results, Canadian Journal of Chemical Engineering, 69, pp. 361-372

McLellan, P.J., Harris, T.J.* and D.W. Bacon (1990), Error Trajectory Descriptions of Nonlinear Controller Designs, Chemical Engineering Science, 45, 3017-3034

Harris, T.J.* and P.J. McLellan (1990), GMC: A Case Study Revisited, Canadian Journal of Chemical Engineering, 68, 1066-1070

MacGregor, J.F. and T.J. Harris (1990), Discussant, Technometrics, 32, 23-26

Harris, T.J.* (1989), Assessment of Control Loop Performance, Canadian Journal of Chemical Engineering, 67, 856-861

Kozub, D., MacGregor, J.F.* and T.J. Harris (1989), Optimal IMC Inverses: Design and Robustness Considerations, Chemical Engineering Science, 44, 2121-2136

Harris, T.J.*, MacGregor, J.F., (1987), Design of Multivariable Linear Quadratic Controllers Using Transfer Functions, AIChE Journal, 33, 1481-1497

Harris, T.J.*, and B. Tyreus, (1987), Comments on ‘Internal Model Control 4: PID Controller Design Using Transfer Functions’, Industrial and Engineering Chemistry, 26, 2161-2162.

MacGregor*, J.F., Harris, T.J., and J.D. Wright, (1984), Duality Between the Control of Processes Subject to Randomly Occurring Deterministic Disturbances and ARIMA Stochastic Disturbances, Technometrics, 26, 389-397.

MacGregor, J.F*., Harris, T.J., and J.D. Wright, (1982), An Overview of Discrete Stochastic Controllers: Generalized PID Algorithms with Dead-Time Compensation, Canadian Journal of Chemical Engineering, 60, 425-432.

MacGregor, J.F*., Harris, T.J., and J.D. Wright, (1980), Self-Tuning and Adaptive Controllers: An Application of Catalytic Reactor Control, Technometrics, 22, 153-164

MacGregor, J.F.*, Harris, T.J., and J.D. Wright, (1980), Optimal Sensor Location with an Application to a Packed Bed Tubular Reactor, AIChE J., 26, 910

**Chapters in Books**

Harris, T.J. (2015), Linear Stochastic Control with Transfer Functions, in Wiley StatsRef: Statistics Reference Online (9 pages)

Harris, T.J. and Seppala, C.T., (2002), Recent Developments in Controller Performance Monitoring and Assessment Techniques, in Chemical Process Control-VI: Assessment and New Directions for Research, AIChE Symposium Series # 326: Vol 98. Editors, J.B. Rawlings, B.A. Ogunnaike and J.W. Eaton, pp208-222.

Harris, T.J., (1994), The Implications of Quality Programs on Chemical Engineering Control & Design, in Foundations of Computer Aided Process Operations, Elsevier (a conference held every 5 years) 25 pages

Yuet, P.K., Kwok, W., Harris, T.J., and Goosen, M.F.A. (1993), Mathematical Modelling of Protein Diffusion and Cell Growth in Microcapsules, Chapter 5 in: Fundamentals of Animal Cell Encapsulation and Immobilization, M.F.A. Goosen (Ed.), CRC Press, Boca Raton, 79-112

**Patents**

Liquid Phase Preparation of (meth)-Acrylate from Alpha-oelefin, U.S. Patent 5,670,702. Issued 23 September 1997.

**Papers in Conference Proceeding**

Dynamic Analysis of Variance Methods for Multivariate Control System Data, 1st International Symposium on Industrial Statistics (Understanding Variation: A Key to Successful Quality Improvement), Linköping, Sweden, August 19-21, 1999

**Papers in Refereed Conference Proceeding **

Wei-Yu*, Wilson, D., Harris, T.J. and B. Young, Control Performance Assessment for Hammerstein-Wiener Models, 9th International Symposium on Dynamics and Control of Process Systems (DYCOPS 2010), Leuven, Belgium, July 5-7, 2010

Wei-Yu*, Wilson, D., Young, B. and Harris, T.J., Variance Decompositions of Nonlinear Systems, 7th IEEE International Conference on Control & Automation , Christchurch, New Zealand, December, 2009

Harris, T.J. and C.T. Seppala,(2001), Recent Developments in Controller Performance Monitoring and Assessment Techniques, Chemical Process Control VI, January 2001, Tucson, Arizona

Desborough, L.D. and T.J. Harris (1992), Control Performance Assessment, The Dream versus Reality; Pulp and Paper Conference, Whistler, B.C., 69-74

Harris, T.J. (1993), Towards a Paradigm for Process Control - An Overview of the Problems and Issues, American Statistical Association, Proceedings of the Section on Quality and Productivity, 15-24

**Technical Reports**

Jofriet, P., Seppala, C.T. Surgenor, B.W. , Harris, T.J., and M. Harvey, An Expert System for Control Loop Performance Analysis, Final Report for NSERC CRD project, (2 /95) 54 pages

Jackson, B.W. and T.J. Harris, (1994), Catalytic Distillation Summary: Research Report NOVA Petrochemicals (6/94) 48 pages

*Many confidential reports with Monsanto Chemical Company & E.I. Dupont de Nemours*

**Abstracts and/or Papers Read**

Golfar, B., McLellan, P.J. and T.J. Harris, “Degrees of Freedom in Multi-Response Estimation”, 64th Canadian Chemical Engineering Conference, Fredericton, October 2013

Golfar, B., McLellan, P.J. and T.J. Harris, “Parameter Inference in Nonlinear Multiresponse Models Using Profiling”, 63rd Canadian Chemical Engineering Conference, Fredericton, October 2013

Golfar, B., McLellan, P.J. and T.J. Harris, Statistical Profiling for Multiresponse Models, 62nd Canadian Chemical Engineering Conference, Vancouver, October 2012

Wu, S., K.B. McAuley and T.J. Harris, "Ranking Parameter Estimability Using Mean Squared Error”,8th World Conference on Chemical Engineering, Montreal, August 23-27th, 2009

Wu, S., K.B. McAuley and T.J. Harris, "An Analysis of Model Selection Criteria in the Case of Underfitting", poster presented at the Second Canada-France Congress, Montreal, June 2008.

Harris, T. J., K. B. McAuley and S. Wu, Not so Simple! The Statistical Analysis of Simplified and Misspecified Models”, 58th Canadian Chemical Engineering Conference, Edmonton, Oct. 2007. Invited Talk.

Wu, S., Harris, T.J., and K.B. McAuley, The Use of Simplified Modes in Linear Case, CMS-MITACS Joint Conference, Winnipeg, MB , June 2007, Paper 58.

- Soon, T.J. Harris and P.J. McLellan, A Generalized Profiling Approach to Inference Analysis in System Identification, Canadian Chem. Eng. Conf., Sherbrooke, October 2006.

Wu, S., Harris, T.J., and K.B. McAuley, When Simplified Models are Better than the True Model, 55th Canadian Chemical Engineering Conference, Toronto (2005), Paper 487

Wei Yu, and T.J. Harris, Parameter Uncertainty Effects on Input Sensitivity Analysis, 54th Canadian Society for Chemical Engineering Conference, Paper #250, Calgary (2004)

Harris, T.J., and Wei-Yu, Assessing Parameter Uncertainty Using Markov Chain Monte Carlo Methods, 53rd Canadian Chemical Engineering Conference, Hamilton Ontario, Paper 273, October 28-30 (2003)

Uche, I., and T.J. Harris, Quantifying Model Uncertainty Using Model Error Modelling, 52nd Canadian Chemical Engineering Conference, Vancouver (2002),

Wei-Yu, and T.J. Harris, Analysis of Multivariable Controllers Using Markov Chains, 52nd Canadian Chemical Engineering Conference, Vancouver (2002)

Liew, S.C.N., and T.J. Harris, Estimation of Cointegrated Relationships in Process Data, 50th Canadian Chemical Engineering Conference, Montreal (2000)

Seppala,C.T., Harris,T.J., and D.W. Bacon, Introduction to the Role of Cointegration In the Analysis of Control System Data , Session #71, 49th Canadian Chemical Engineering Conference, Saskatoon (1999)

Miller, N., McLellan, P.J., and T.J. Harris, Performance Assessment Using Nonlinear Time Series Models, Session #64, 48th Canadian Chemical Engineering Conference, London, Ontario, (1998)

Quinn, S.L., Bacon, D.W., and T.J. Harris, How Big is N for Time Series Models, Session #64, 48th Canadian Chemical Engineering Conference, London, Ontario, (1998)

Boudreau,F, MacGregor,F.J., and T.J. Harris, Relation Between Delay Structure and Performance of Multivariable Minimum Variance Controllers, AIChE Winter Meeting, Chicago, IL Paper 149b (1996)

T.J. Harris, F. Boudreau and J.F. MacGregor, Performance Assessment of Multivariable Feedback Controllers, #28, 45th Canadian Chemical Engineering Conference, Quebec City (1995)

T.J. Harris, Input Signal Design for Identification, 43rd Canadian Chemical Engineering Conference, Ottawa, Ontario (1993)

Berg, D. and T.J. Harris, Effect of Mass Transport Resistances of the Synthesis of MTBE in Catalytic Distillation Environment, 42nd Canadian Chemical Engineering Conference, Toronto, Ontario (1992)

Desborough, L.D. and T.J. Harris, Extension to Statistical Methods for Control Loop Assessment, ACC, Chicago, Illinois (1992)

Amphlett, J.C., Harris, T.J., Mann, R.F., Peppley, B.A. and P.R. Roberge, Computer Simulation of a Catalytic Methanol Reforming Hydrogen Generator for a Portable Fuel Cell Power Plant, 41st Canadian Chemical Engineering Conference, Vancouver, B.C., October (1991)

Foley, M. and T.J. Harris, Performance and Structure of H¥ Controllers, 41st Canadian Chemical Engineering Conference, Vancouver, BC, October (1991)

Fogal, D. and T.J. Harris, Detection of Nonlinearities in Process Operation Data, 41st Canadian Chemical Engineering Conference, Vancouver, BC, October (1991)

McLellan, P.J., Harris, T.J. and D.W. Bacon, Disturbance Decoupling of Staged Chemical Processes, ACC, San Diego, CA (1990)

Harris, T.J. and P.J. McLellan, Deadtime and Disturbance Induced Performance Limitations in Multivariable Control, 40th Canadian Chemical Engineering Conference, Halifax, NS, July (1990)

McLellan, J.P., Harris, T.J. and D.W. Bacon, The Nonlinear Inversion Problem in Process Control, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

Harris, T.J., One Step Optimal Controllers for Nonsymmetric and Nonquadratic Cost Functions, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

Koung, C.W. and T.J. Harris, Sensitivity of the Relative Gain Array, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

Shirt, R.W., Harris, T.J. and D.W. Bacon, Selection of Perturbation Signals for Identification of Dynamic Behavior, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

Yuet, P.K., Harris, T.J. and M.F.A. Goosen, Mathematical Modelling of Animal Cell Growth in Microcapsules, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

Jackson, B.W. and T.J. Harris, Creative and Innovative Problem Solving Using Flowsheet Simulators, 39th Canadian Chemical Engineering Conference, Hamilton, Ontario (1989)

**Popular Articles**

Jackson, B.W. and T.J. Harris, Creative and Innovative Problem Solving Using Flowsheet Simulators, Canadian Chemical News, pp. 19-21 (June 1990)

**Thesis Supervised**

Yuan, Hui, Process Analysis and Performance Assessment for Sheet Forming Processes, (co-supervised with P.J. McLellan), Ph.D. (2015)

Golfar, B., Parameter Inference and Estimability Analysis for Nonlinear Multi-Response Systems by Means of Profiling, (co-supervised with P.J. McLellan), Ph.D. (2014)

Liba, M.J., Measurement System Design for Chemical Processes, (co-supervised with M. Guay), M.Sc. (2011)

Shaohua Wu, Model Error Modelling Methods in Chemical Engineering, (co-supervised with K.B. McAuley), Ph.D. (2009)

Wei Yu, Variance Analysis for Nonlinear Systems, Ph.D. (2007)

Wong, John, Fault Detection Application of Alternative Mean-Centering and Pattern Matching Techniques in Non-Repeated Multivariate Time-Series Data Trajectories (co-supervised with P.J. McLellan), M.Sc. (2006)

Wu,S., Two-Step Estimation in Linear Regression (co-supervised with K.B. McAuley), M.Sc. (2005).

Soon, A., A Generalized Profiling Approach to Inference Analysis in System Identification (co-supervised with P.J. McLellan), M.Sc. (2005)

Breck, C., Fault Detection for an Aircraft Environment Control system using Dynamic Principal Component Analysis, , (co-supervised with P.J. McLellan), M.Sc. (2005)

Uche, Ikenna, An Analysis of Model Error Modelling, M.Sc. (2003)

Wei-Yu, Applications of Time Series Count Data for Process Analysis, M.Sc. (2002)

Liew, Chen Nei, Estimation of Cointegrating Relationships in Process Data, M.Sc. (2002)

Patton, M., Describing Uncertainty in State Estimates (co-supervised with P.J. McLellan), M.Sc. (2000)

Seppala, C.T., Dynamic Analysis of Variance Methods for Monitoring Control System Performance, (co-supervised with D.W. Bacon), Ph.D. (1999)

Quinn, S.L., Measuring and Predicting Uncertainty in Control-Relevant Statistics, (co-supervised with D.W. Bacon), Ph.D. (1999)

Laflamme, J., Dynamic model of the solid-state polymerization of nylon 6,6, (co-supervised with P.J. McLellan), M.Sc. (1997)

Neagu, L. Production of BHP by Catalytic Distillation, (co-supervised with B.W. Jackson), M.Sc. (1997)

Logan., G.A., Synthesis of dimethyl carbonate with CuC12 , (co-supervised with B.W. Jackson), M.Sc. (1997)

Zagrobelny, J., System Identification Techniques for a Rolling Mill Gauge System, (co-supervised with M. Bayoumi), M.Sc. (1996)

Rose, J., Reactive Distillation, (co-supervised with B. Jackson), M.Sc. (1994)

Piette, R., Geometric Interpretation of Interaction Measures, (co-supervised with P.J. McLellan), M.Sc. (1994)

Berg, David, Mass Transfer Resistances in MTBE Synthesis, Ph.D. (1994)

Baumert, R.M., Performance Modelling of the Ballard Mark IV Solid Polymer Electrolyte Fuel Cell, (co-supervised with R.F. Mann, RMC), M.Sc. (1993)

Foley, Michael, H-infinity Methods for Chemical Process Control, Ph.D. (1993)

Peppley, B., Catalytic Steam Reforming of Methanol Using a Commercial Low Temperature Shift Catalyst, (co-supervised with R.F. Mann, RMC), M.Sc. (1993)

Kuye, M.A., An Evaluation of Microbial Biomass Estimation Techniques in Dynamic Fermentation Processes and Their Impact on Modelling, (co-supervised with A.J. Daugulis), M.Sc.(1992)

Desborough, L., Performance Assessment Measures for Univariate Control, M.Sc. (1992)

McLellan, P.J., Nonlinear Error Trajectory Controllers for Output Tracking and Disturbance Rejection, (co-supervised with D.W. Bacon), Ph.D. (1990)

Yuet, P.K., Mathematical Modelling of Animal Cell Growth in Microcapsules, (co-supervised with M.F.A. Goosen), M.Sc. (1990)