You are welcome to contact me for having a copy of each of these publications!

    

    Journal Papers

    Submitted J. Papers

    Conference Papers

    Non-refereed Papers

    Tech. Presentation Papers

 
 
  

 
Publications

Selected Peer-Reviewed Journal Papers

  1. E. Ansari, T. Menucci, M. Shahbakhti, J. Naber, " Experimental Investigation into Effects of High Reactive Fuel on Combustion and Emission Characteristics of the Diesel - Natural Gas RCCI Engine ", Applied Energy, Vol. 239, Pages 948-956, 2019.

  2. A. Raut, B. Irdmousa, M. Shahbakhti, " Dynamic Modeling and Model Predictive Control of an RCCI Engine ", Control Engineering Practice, Vol. 81, Pages 129-144, 2018.

  3. E. Ansari, M. Shahbakhti, J. Naber, " Optimization of Performance and Operational Cost for a Dual Mode Diesel-Natural Gas RCCI and Diesel Combustion Engine ", Applied Energy, Vol. 231, Pages 549-561, 2018.

  4. M. Bidarvatan, M. Shahbakhti, " Analysis and Control of Torque Split in Hybrid Electric Vehicles by Incorporating Powertrain Dynamics ", ASME Journal of Dynamic Systems, Measurement, Control, Vol. 140, Issue 11, No. 111009-111009-11, 2018.

  5. M. Amini, M. Shahbakhti, S. Pan, " Adaptive Discrete Second Order Sliding Mode Control with Application to Nonlinear Automotive Systems ", ASME Journal of Dynamic Systems, Measurement, Control, Vol. 140, Issue 12, No. 121010-121010-12, 2018.

  6. B. M. Mahadevan, J. Johnson, M. Shahbakhti, " Development of a Kalman Filter Estimator for Simulation and Control of Particulate Matter Distribution of a Diesel Catalyzed Particulate Filter ", International Journal of Engine Research, 19 pages, DOI: 10.1177/1468087418785855, 2018.

  7. M. Razmara, G. Bharati, M. Shahbakhti, S. Paudyal, R. Robinett, " Bilevel Optimization Framework for Smart Building-to-Grid Systems ", IEEE Transactions on Smart Grid, Vol. 9, No. 2, Pages 582-593, 2018.

  8. A. Solouk, M. Shakiba, J. Arora, M. Shahbakhti, " Fuel Consumption Assessment of an Electrified Powertrain with a Multi-Mode High-Efficiency Engine in Various Levels of Hybridization ", Energy Conversion and Management, Vol. 155, Pages 100-115, 2018.

  9. A. Rezaei, J. B. Burl, A. Solouk, B. Zhou, M. Rezaei, M. Shahbakhti, " Catch Energy Saving Opportunity (CESO), an Instantaneous Optimal Energy Management Strategy for Series Hybrid Electric Vehicles ", Applied Energy, Vol. 208, pages 655-665, 2017.

  10. A. Solouk, J. Tripp, M. Shakiba, M. Shahbakhti, " Fuel Consumption Assessment of a Multi-Mode Low Temperature Combustion Engine as Range Extender for an Electric Vehicle ", Energy Conversion and Management, Vol. 148, Pages 1478-1496, 2017.

  11. M. Razmara, G. R. Bharati, D. Hanover, M. Shahbakhti, S. Paudyal, R.D. Robinett III, " Building-to-grid Predictive Power Flow Control for Demand Response and Demand Flexibility Programs ", Applied Energy, Vol. 203, Pages 128-141, 2017.

  12. K. Poorghasemi, R. Khoshbakhti Saray, E. Ansari, B. Khoshbakht, M. Shahbakhti, J. D. Naber, " Effect of Diesel Injection Strategies on Natural Gas/Diesel RCCI Combustion Characteristics in a Light-duty Diesel Engine ", Applied Energy, Volume 199, Pages 430-446, 2017.

  13. B. Bahri, M. Shahbakhti, A.A. Aziz, " Real-time Modeling of Ringing in HCCI Engines using Artificial Neural Networks ", Energy, Volume 125, Pages 509–518, 2017.

  14. M. Fathi, O. Jahanian, M. Shahbakhti, " Modeling and Controller Design Architecture for Cycle-by-Cycle Combustion Control of Homogeneous Charge Compression Ignition (HCCI) Engines - A Comprehensive Review ", Energy Conversion and Management, Volume 139, Pages 1–19, 2017.

  15. M. R. Amini, M. Shahbakhti, S. Pan, J. K. Hedrick, " Bridging the Gap Between Designed and Implemented Controllers via Adaptive Robust Discrete Sliding Control ", Control Engineering Practice, Vol. 59, pages 1-15, 2017.

  16. A. Solouk, M. Shakiba, M. Shahbakhti, " Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine ", SAE Int. J. of Alternative Powertrains, 15 pages, 6(1):2017, doi:10.4271/2017-01-1153, 2017.

  17. M. Amini, M. Razmara, M. Shahbakhti, " Robust Model-Based Discrete Sliding Mode Control of an Automotive Electronic Throttle Body ", SAE Int. J. of Commercial Vehicles, 15 pages, 10(1):2017, doi:10.4271/2017-01-0598, 2017.

  18. Y. Wang, J. Zhang, X. Wang, P. Dice, M. Shahbakhti, J. Naber, M. Czekala, Q. Qu, G. Huberts, " Investigation of Impacts of Spark Plug Orientation on Early Flame Development and Combustion in a DI Optical Engine ", SAE Int. J. Engines, 17 pages, 10(3):2017, doi:10.4271/2017-01-0680, 2017.

  19. A. Solouk, M. Shahbakhti, " Modeling and Energy Management of an HCCI based Powertrain for Series Hybrid and Extended Range Electric Vehicles ", 29 pages, Int. J. of Powertrains, Vol. 6, Issue 2, 29 pages, DOI: 10.1504/IJPT.2017.10001761, 2017.

  20. B. M. Singalandapuram, J. H. Johnson and M. Shahbakhti, " Predicting Pressure Drop, Temperature and Particulate Matter Distribution of a Catalyzed Diesel Particulate Filter using a Multi-zone Model including Cake Permeability ", Emission Control Science & Technology, Volume 3, Issue 2, pages 171-201, 2017.

  21. A. Solouk, M. Shahbakhti, " Energy Optimization and Fuel Economy Investigation of Series Hybrid Electric Vehicle Integrated with Diesel/RCCI Engines ", Energies, 9(12), pages 1-23, 1020; 2016.

  22. M. Razmara, M. Bidarvatan, M. Shahbakhti, R. Robinett III, " Optimal Exergy-based Control of Internal Combustion Engines ", Applied Energy, Vol. 183, pages 1389-1403, 2016.

  23. B. Bahri, M. Shahbakhti, K. Kannan, A.A. Aziz, " Identification of Ringing Operation for Low Temperature Combustion Engines ", Applied Energy, Vol. 171, pages 142-152, Jun. 2016.

  24. M. Nazemi and M. Shahbakhti, " Modeling and Analysis of Fuel Injection Parameters for Combustion and Performance of an RCCI Engine ", Applied Energy, Vol. 165, pages 135-150, Mar. 2016.

  25. K. Khodadadi Sadabadi, M. Shahbakhti, A. N. Bharath and R. D. Reitz, " Modeling of Combustion Phasing of a Reactivity-Controlled Compression Ignition Engine for Control Applications ", Int. J. of Engine Research, Vol. 17, Issue 4, Pages 421-435, 2016.

  26. M. Razmara, M. Maasoumy, M. Shahbakhti, and R. D. Robinett III, " Optimal Exergy Control of HVAC Systems ", Applied Energy, Vol. 156, Pages 555-565, Oct. 2015.

  27. B. M. Singalandapuram, J. H. Johnson and M. Shahbakhti, " Experimental and Simulation Analysis of Temperature and Particulate Matter Distribution for a Catalyzed Diesel Particulate Filter ", Emission Control Science and Technology, 29 pages, Vol. 1, Issue 4, Pages 255-283, Oct. 2015.

  28. B. M. Singalandapuram, J. H. Johnson and M. Shahbakhti, " Development of a Catalyzed Diesel Particulate Filter Multi-zone Model for Simulation of Axial and Radial Substrate Temperature and Particulate Matter Distribution ", Emission Control Science and Technology, Vol. 1, Issue 2, Pages 183-202, May 2015.

  29. M. Boudaghi, M. Shahbakhti, S.A. Jazayeri, " Misfire Detection of SI Engines Using a New Technique Based on Mean Power Output ", ASME J. of Engineering for Gas Turbines and Power, 9 pages, Vol. 137, Issue 9, Sept. 2015.

  30. R. Salehi, A. Alasty, M. Shahbakhti, G. Vossoughi, " Detection and Isolation of Faults in the Exhaust Path of Turbocharged Automotive Engines ", Int. J. of Automotive Technology, Vol. 16, Issue 1, Pages 127-138, Feb. 2015.

  31. J. Rezaei, M. Shahbakhti, B. Bahri, A.A. Aziz, " Performance Prediction of Oxygenate Fueled HCCI Engines using Artificial Neural Networks", Applied Energy, Vol. 138, Pages 460-473, Jan. 2015.

  32. M. Shahbakhti, M. R. Amini, J. Li, S. Asami, J. K. Hedrick, " Early Model-Based Design and Verification of Automotive Control System Software Implementations ", ASME Journal of Dynamic Systems, Measurement and Control, 14 pages, Vol. 137, Issue 2, Feb. 2015.

  33. M. Bidarvatan, V. Thakkar, M. Shahbakhti, B. Bahri, A.A. Aziz, " Grey-box Modeling of HCCI Engines ", Applied Thermal Engineering, Vol. 70, Issue 1, pages 397-409, Sept. 2014.

  34. M. Maasoumy, M. Razmara, M. Shahbakhti, A. Sangiovanni-Vincentelli, " Handling Model Uncertainties in Model Predictive Control for Energy Efficient Buildings ", J. of Energy and Buildings, Vol. 77, Pages 377-392, Jul. 2014.

  35. M. Amini, M. Shahbakhti, A. Ghaffari, " A Novel Singular Perturbation Technique for Model-Based Control of Cold Start Hydrocarbon Emission ", SAE Int. J. Engines , 13 pages, Vol. 7, Issue 3, Aug. 2014.

  36. M. Bidarvatan, M. Shahbakhti, " Integrated HCCI Engine Control based on a Performance Index ", ASME Journal of Engineering for Gas Turbines and Power, 12 pages, Vol. 136, Issue 10, Oct. 2014.

  37. M. Bidarvatan, M. Shahbakhti, " Grey-Box Modeling for Performance Control of a HCCI Engine with Blended Fuels ", ASME Journal of Engineering for Gas Turbines and Power, 10 pages, Vol. 136, Issue 10, Oct. 2014.

  38. R. Salehi, M. Shahbakhti, J. K. Hedrick, " Real-time Hybrid Control of Automotive Cold Start Hydrocarbon Emission ", ASME Journal of Dynamic Systems, Measurement and Control, 11 pages, Vol. 136, Issue 4, Jul. 2014.

  39. M. Bidarvatan, M. Shahbakhti, S. A. Jazayeri, C. R. Koch, " Cycle-to-Cycle Modeling and Sliding Mode Control of Blended-Fuel HCCI Engine ", J. of Control Engineering Practice, Vol. 24, Pages 79–91, Mar. 2014.

  40. M. Koochack, A. Gharehghani, M. Shahbakhti, " Experimental and Simulation Study of In-cylinder Strategies for Regeneration of Lean NOx Traps in an HSDI Diesel Engine ", IMechE Part D: Journal of Automobile Engineering, Vol. 227, Issue 12, Pages 1661–1673, Dec. 2013.

  41. B. Bahri, A. A. Aziz, M. Shahbakhti, M. F. Muhamad Said, " Analysis and Modeling of Exhaust Gas Temperature in an Ethanol Fuelled HCCI Engine ", J. of Mechanical Science and Technology, Vol. 27, Issue 11, Pages 3531–3539, Nov. 2013.

  42. M. Dehghani, M. Shahbakhti, C. R. Koch, S. A. Jazayeri, " Thermodynamic Control-oriented Modeling of Cycle-to-Cycle Exhaust Gas Temperature in an HCCI Engine ", Applied Energy, Vol. 110, Pages 236–243, Oct. 2013.

  43. B. Bahri, A. A. Aziz, M. Shahbakhti, M. F. Muhamad Said, " Understanding and Detection of Misfire in an HCCI Engine Fuelled with Ethanol ", Applied Energy, Vol. 108, pages 24-33, Aug. 2013.

  44. M. Nazoktabar, S. A. Jazayeri, O. Jahanian, M. Shahbakhti, " Using a Single Zone Thermodynamic Model in an HCCI Engine to Predict Effective Controlling Parameters ", J. of Engine Research, Vol. 25, pages 13-23, 2013.

  45. B. Bahri, A. A. Aziz, M. Shahbakhti, M. F. Muhamad Said, " Misfire Detection Based on Statistical Analysis for an Ethanol Fueled HCCI Engine ", J. of International Review of Mechanical Engineering, Vol. 6, Issue 6, pages 1276-1282, September 2012.

  46. M. Bidarvatan, M. Shahbakhti, S. A. Jazayeri, " Model-Based Control of Combustion Phasing in an HCCI Engine ", SAE Int. J. Engines, Vol. 5, Issue 3, pages 1163-1176, 2012.

  47. M. Bidarvatan, M. Shahbakhti, S. A. Jazayeri, " Optimal Integral State Feedback Control of HCCI Combustion Timing ", Int. Journal of Automotive Engineering, Vol. 1, Issue 3, pages 206-217, 2011.

  48. M. Shahbakhti, A. Ghazimirsaied, C. R. Koch, " Experimental Study of Exhaust Temperature Variation in an HCCI Engine ", IMechE Part D: Journal of Automobile Engineering, Vol. 224, Issue 9, pages 1177-1197, 2010.

  49. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " HCCI Combustion Phasing Prediction Using a Symbol-Statistic Approach ", ASME Journal of Engineering for Gas Turbines and Power, 5 pages, Vol. 132, Issue 8, 2010.

  50. M. Shahbakhti, C. R. Koch, " Physics Based Control Oriented Model for HCCI Combustion Timing ", ASME Journal of Dynamic Systems, Measurement and Control, Vol. 132, Issue 2, 12 pages, 2010.

  51. M. Shahbakhti, S. A. Jazayeri, M. Ghafuri, A. R. Aslani, A. Sahraeian, S. Azadi, " A Method to Determine Fuel Transport Dynamic Model Parameters in Port-Fuel Injected Gasoline Engines during Cold Start and Warm-up Conditions " , ASME Journal of Engineering for Gas Turbines and Power, 5 pages, Vol. 132, Issue 7, 2010.

  52. M. Shahbakhti, C. R. Koch, " Dynamic Modeling of HCCI Combustion Timing in Transient Fueling Operation ", SAE Int. J. Engines , Vol. 2, pages 1098-1113, 2009.

  53. M. Shahbakhti, C. R. Koch, " Characterizing the Cyclic Variability of Ignition Timing in an HCCI Engine Fueled with n-Heptane/iso-Octane Blend Fuels ", Int. Journal of Engine Research, Vol. 9, Issue 5, pages 361-397, 2008.

  54. M. Shams Zahraei, S. A. Jazayeri, M. Shahbakhti, M. Sharifirad, " Look-Forward Longitudinal Dynamic Modeling for a Series-Parallel Hybrid Electric Vehicle ", Int. Journal of Electric and Hybrid Vehicles, Vol. 1, Issue 4, pages 342-363, 2008.

  55. P. Kirchen, M. Shahbakhti, C. R. Koch, " A Skeletal Kinetic Mechanism for PRF Combustion in HCCI Engines ", Journal of Combustion Science and Technology, Vol. 179, Issue 6, pages 1059 - 1083, 2007.

  56. K. Swan, M. Shahbakhti, C. R. Koch, " Predicting Start of Combustion Using a Modified Knock-Integral Method for an HCCI Engine ", SAE 2006 Transactions Journal of Engines, pages 611-620, 2007.

  57. S. Sharifi Rad, S. A. Jazayeri, M. Shahbakhti, " Automatic Driver Design and Longitudinal Dynamic Simulation for Passenger Cars ", SAE 2006 Transactions Journal of Passenger Cars - Mechanical Systems, pages 923-930, 2007.

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Submitted Journal Papers

  1. V. R. Chundru, B. S. Mahadevan, J. H. Johnson, G. G. Parker, M. Shahbakthi, " Development of a 2D Model of a SCR Catalyst on a DPF ", 35 pages, Submitted to Emission Control Science and Technology, Aug. 2018.
  2. M. Toub, C. Reddy, M. Razmara, M. Shahbakhti, R. Robinett, G. Aniba, " Model-Based Predictive Control for Optimal MicroCSP Operation Integrated with Building HVAC Systems ", 58 pages, Submitted to Applied Energy, Dec. 2018.

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Selected Refereed Conference Papers

  1. C. Reddy, M. Razmara, M. Shahbakhti, R. Robinett, " Optimal Exergy-wise Predictive Control for a Combined MicroCSP and HVAC System in a Building ", American Control Conference, 6 pages, Jul. 10-12, 2019, Philadelphia, PA, USA. [Accepted in Jan 2019]

  2. B. Khoshbakht Irdmousa, S. Z. Rizvi, J. Mohammadpour Velni, J. Naber, M. Shahbakhti, " Data-driven Modeling and Predictive Control of Combustion Phasing for RCCI Engines ", American Control Conference, 6 pages, Jul. 10-12, 2019, Philadelphia, PA, USA. [Accepted in Jan 2019]

  3. M. Toub, M. Shahbakhti, R. Robinett, G. Aniba, " MPC-trained ANFIS for Control of MicroCSP Integrated into a Building HVAC System ", American Control Conference, 6 pages, Jul. 10-12, 2019, Philadelphia, PA, USA. [Accepted in Jan 2019]

  4. P. Reddy, K. Darokar, D. Robinette, M. Shahbakhti, J. Blough, M. Ravichandran, M. Farmer, J. Doering, " Control-Oriented Modeling of a Vehicle Drivetrain for Shuffle and Clunk Mitigation ", SAE 2019 World Congress, 15 pages, SAE Paper No. 2019-01-0345, Apr. 9-11, 2019, Detroit, MI, USA. [Accepted in Jan 2019]

  5. X. Yang, V. B. Vinhaes, M. Turcios, G. McTaggart-Cowan, J. Huang, J. Naber, M. Shahbakhti, H. Schmidt, W. Atkinson, " Process for Study of Micro-Pilot Diesel-NG Dual Fuel Combustion in a Constant Volume Combustion Vessel Utilizing the Premixed Pre-burn Procedure ", SAE 2019 World Congress, 15 pages, SAE Paper No. 2019-01-1160, Apr. 9-11, 2019, Detroit, MI, USA. [Accepted in Jan 2019]

  6. C. R. Reddy, M. Toub, M. Razmara, M. Shahbakhti, R. D. Robinett III, G. Aniba, " Modeling and Optimal Control of Micro-CSP and a Building HVAC System to Minimize Electricity Cost ", ASME 2018 Dynamic Systems and Control Conference, 10 pages, Sep. 30 - Oct. 3, 2018, Atlanta, GA, USA.

  7. M. Toub, C. R. Reddy, M. Razmara, M. Shahbakhti, R. D. Robinett III, G. Aniba, " Model Predictive Control for MicoCSP Integration into a Building HVAC System ", 14th IEEE International Conference on Control and Automation, 6 pages, Jun. 12-15, 2018, Anchorage, AK, USA.

  8. H. Wang, K. Sacheva, J. Tripp, B. Chen, D. Robinette, M. Shahbakhti, " Optimal Map-Based Mode Selection and Powertrain Control for a Multi-Mode Plug-in Hybrid Electric Vehicle ", 14th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA), 6 pages, July 2-4, 2018, Oulu, Finland.

  9. M. R. Amini, M. Shahbakhti, J. Sun, " Predictive Second Order Sliding Control of Constrained Linear Systems with Application to Automotive Control Systems ", 2018 American Control Conference, 6 pages, June 27-29, 2018, Milwaukee, WI, USA.

  10. A. Raut, M. Bidarvatan, H. Borhan, M. Shahbakhti, " Model Predictive Control of an RCCI Engine ", 2018 American Control Conference, 6 pages, June 27-29, 2018, Milwaukee, WI, USA.

  11. Y. Wang, J. Zhang, Z. Yang, X. Wang, P. Dice, M. Shahbakhti, J. Naber, M. Czekala, Q. Qu, G. Huberts, " Investigation of Flow Conditions and Tumble Near the Spark Plug in a DI Optical Engine at Ignition ", SAE 2018 World Congress, 18 pages, SAE Paper No. 2018-01-0208, Apr. 10-12, 2018, Detroit, MI, USA.

  12. M. R. Amini, M. Shahbakhti, S. Pan, " MIMO First and Second Order Discrete Sliding Mode Controls of Uncertain Linear Systems Under Implementation Imprecisions ", ASME 2017 Dynamic Systems and Control Conference, 10 pages, Oct. 11-13, 2017, Tysons, VA, USA.

  13. M. R. Amini, M. Shahbakhti, " Design of an SI Engine Cold Start Controller based on Dynamic Coupling Analysis ",2017 Int. Conference on Advanced Vehicle Powertrains, 22 pages, Sep. 25-27, 2017, Hangzhou, China.

  14. M. Razmara, G. R. Bharati, D. Hanover, M. Shahbakhti, S. Paudya, and R. D. Robinett III, " Enabling Demand Response Programs via Predictive Control of Building-to-Grid Systems Integrated with PV Panels and Energy Storage Systems ", 2017 American Control Conference, 6 pages, May 24-26, 2017, Seattle, WA, USA.

  15. M. Amini, M. Shahbakhti, S. Pan, and J. K. Hedrick, " Discrete Adaptive Second Order Sliding Mode Controller Design with Application to Automotive Control Systems with Model Uncertainties ", 2017 American Control Conference, 6 pages, May 24-26, 2017, Seattle, WA, USA.

  16. N. Teja Kondipati, J. K. Arora, M. Bidarvatan, M. Shahbakhti, " Modeling, Design and Implementation of a Closed-Loop Combustion Controller for an RCCI Engine ", 2017 American Control Conference, 6 pages, May 24-26, 2017, Seattle, WA, USA.

  17. M. Amini, M. Razmara, M. Shahbakhti, " Robust Model-Based Discrete Sliding Mode Control of an Automotive Electronic Throttle Body ", SAE 2017 World Congress, 15 pages, SAE Paper No. 2017-01-0598, Apr. 4-6, 2017, Detroit, MI, USA.

  18. A. Solouk, M. Shakiba, M. Shahbakhti, " Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine ", SAE 2017 World Congress, 15 pages, SAE Paper No. 2017-01-1153, Apr. 4-6, 2017, Detroit, MI, USA.

  19. J. K. Arora, M. Shahbakhti, " Real-time Closed-loop Control of a Light-duty RCCI Engine During Transient Operations ", SAE 2017 World Congress, 15 pages, SAE Paper No. 2017-01-0767, Apr. 4-6, 2017, Detroit, MI, USA.

  20. Y. Wang, J. Zhang, P. Dice, X. Wang, M. Shahbakhti, J. Naber, M. Czekala, Q. Qu, G. Huberts, " An Experimental Study on the Interaction between Flow and Spark Plug Orientation on Ignition Energy and Duration for Different Electrode Designs ", SAE 2017 World Congress, 10 pages, SAE Paper No. 2017-01-0672, Apr. 4-6, 2017, Detroit, MI, USA.

  21. A. Yazdani, J. Naber, M. Shahbakhti, P. Dice, C. Glugla, S. Cooper, D. McEwan, G. Huberts, " Air Charge and Residual Gas Fraction Estimation for a Spark-Ignition Engine Using In-Cylinder Pressure ", SAE 2017 World Congress, 15 pages, SAE Paper No. 2017-01-0527, Apr. 4-6, 2017, Detroit, MI, USA.

  22. Y. Wang, J. Zhang, X. Wang, P. Dice, M. Shahbakhti, J. Naber, M. Czekala, Q. Qu, G. Huberts, " Investigation of Impacts of Spark Plug Orientation on Early Flame Development and Combustion in a DI Optical Engine ", SAE 2017 World Congress, 17 pages, SAE Paper No. 2017-01-0680, Apr. 4-6, 2017, Detroit, MI, USA.

  23. A. Solouk, M. Shakiba, K. Kannan, H. Solmaz, M. Bidarvatan, N. T. Kondipati, P. Dice, M. Shahbakhti, " Fuel Economy Benefits of Integrating a Multi-Mode Low Temperature Combustion (LTC) Engine in a Series Extended Range Electric Powertrain ", SAE 2016 Int. Powertrains, Fuels & Lubricants Conference, 15 pages, SAE Paper No. 2016-01-2361, Oct. 24-26, 2016, Baltimore, Maryland, USA. (Received best presentation award of the conference.)

  24. E. Ansari, K. Poorghasemi, B. K. Irdmousa, M. Shahbakhti, J. D. Naber, " Efficiency and Emissions Mapping of a Light Duty Diesel – Natural Gas Engine Operating in Conventional Diesel and RCCI Modes ", SAE 2016 Int. Powertrains, Fuels & Lubricants Conference, 15 pages, SAE Paper No. 2016-01-2309, Oct. 24-26, 2016, Baltimore, Maryland, USA.

  25. M. R. Amini, M. Shahbakhti, S. Pan, J. K. Hedrick, " Handling Model and Implementation Uncertainties via an Adaptive Discrete Sliding Mode Controller Design ", 2016 ASME Dynamic Systems Control Conference, 10 pages, Oct. 12-14, 2016, Minneapolis, MN, USA. (Selected as the top six best student papers out of 233 conference paper submissions.)

  26. K. Khodadadi Sadabadi, M. Shahbakhti, " Dynamic Modeling and Controller Design of Combustion Phasing of an RCCI Engine ", 2016 ASME Dynamic Systems Control Conference, 10 pages, Oct. 12-14, 2016, Minneapolis, MN, USA.

  27. G. R. Bharati, M. Razmara, S. Paudyal, M. Shahbakhti, R. Robinett III, " Hierarchical Optimization Framework for Demand Dispatch in Building-Grid Systems ", 2016 IEEE Power & Energy Society (PES) General Meeting, 5 pages, Jul. 17-21, 2016, Boston, MA, USA.

  28. M. R. Amini, M. Shahbakhti, J. K. Hedrick, " Discrete Sliding Controller Design with Robustness to Implementation Imprecisions via Online Uncertainty Prediction ", 2016 American Control Conference, 6 pages, Jul. 6-8, 2016, Boston, MA, USA. (Selected as the best presentation in the session)

  29. M. Razmara, M. Bidarvatan, M. Shahbakhti, R. Robinett III, " Novel Exergy-Wise Predictive Control of Internal Combustion Engines ", 2016 American Control Conference, 6 pages, Jul. 6-8, 2016, Boston, MA, USA. (Selected as the best presentation in the session)

  30. J. Dobbs, M. Razmara, M. Shahbakhti, S. Paudyal, " Selecting Control Input Type for a Building Predictive Controller Integrated in a Power Grid ", 2016 American Control Conference, 6 pages, Jul. 6-8, 2016, Boston, MA, USA.

  31. M. R. Amini, M. Shahbakhti, J. K. Hedrick, " Easily Verifiable Adaptive Sliding Mode Controller Design with Application to Automotive Engines ", SAE World Congress, 16 pages, SAE Paper No. 2016-01-0629, Apr. 12-14, 2016, Detroit, MI, USA.

  32. M. Razmara, M. Bidarvatan, M. Shahbakhti, R. Robinett III " Innovative Exergy-based Combustion Phasing Control of IC Engines ", SAE World Congress, 13 pages, SAE Paper No. 2016-01-0815, Apr. 12-14, 2016, Detroit, MI, USA.

  33. M. Bidarvatan and M. Shahbakhti, " Energy Management of a Hybrid Electric Vehicle by Incorporating Powertrain Dynamics ", ASME Dynamic Systems and Control Conference, 10 pages, October 28-30, 2015, Columbus, Ohio, USA.

  34. M. Razmara, M. Maasoumy, M. Shahbakhti, R. Robinett, " Exergy-Based Model Predictive Control for Building HVAC Systems ", American Control Conference, 6 pages, Jul. 1-3, 2015, Chicago, IL, USA.

  35. M. Bidarvatan, D. Kothari, M. Shahbakhti, " Integrated Cycle-to-Cycle Control of Exhaust Gas Temperature, Load, and Combustion Phasing in an HCCI Engine ", American Control Conference, 6 pages, Jul. 1-3, 2015, Chicago, IL, USA. (Selected as the best presentation in the session)

  36. M. Razmara, G. Bharati, M. Shahbakhti, S. Paudyal, R. Robinett, " Bidirectional Optimal Operation of Smart Building-to-Grid Systems", American Control Conference, 6 pages, Jul. 1-3, 2015, Chicago, IL, USA.

  37. S. Polat, K. Kannan, M. Shahbakhti, A. Uyumaz, H. S. Yücesu, " An Experimental Study for the Effects of Supercharging on Performance and Combustion of an Early Injection HCCI Engine ", Int. Research Conference on Engineering, Science and Management (IRCESM), 6 pages, June 3-4, 2015, Dubai, UAE. (Received best presentation award of the conference)

  38. H. Saigaonkar, M. Nazemi and M. Shahbakhti, " Sequential Model for Residual Affected HCCI with Variable Valve Timing ", 15 pages, 2015 SAE World Congress, SAE Paper No. 2015-01-1748, Apr. 21-23, 2015, Detroit, MI, USA.

  39. M. Bidarvatan and M. Shahbakhti, " Impact of Engine Dynamics on Torque Split Management of a Hybrid Electric Vehicle ", ASME Dynamic Systems and Control Conference, 10 pages, Oct. 22-24, 2014, San Antonio, Texas, USA.

  40. A. Solouk, M. Shahbakhti, M. J. Mahjoob, " Energy Management and Control of a Hybrid Electric Vehicle with an Integrated Low Temperature Combustion (LTC) Engine ", ASME Dynamic Systems and Control Conference, 10 pages, Oct. 22-24, 2014, San Antonio, Texas, USA.

  41. M. Nazemi, H. Saigaonkar, M. Shahbakhti, " Thermo-kinetic Modeling of Variable Valve Timing Effects on HCCI Engine Combustion ", Int. Conference on Advanced Technology & Sciences, 6 pages, August 12-15, 2014, Antalya, Turkey.

  42. M. J. Rezaei and M. Shahbakhti, " Artificial Neural Networks Based Prediction of Performance and Exhaust Emissions in a Butanol Fuelled HCCI Engine ", Int. Conference on Advanced Technology & Sciences, 6 pages, August 12-15, 2014, Antalya, Turkey.

  43. M. Maasoumy, M. Razmara, M. Shahbakhti, A. Sangiovanni-Vincentelli, " Selecting Building Predictive Control Based on Model Uncertainty ", American Control Conference, 7 pages, Jun. 4-6, 2014, Portland, OR, USA.

  44. M. Bidarvatan, V. Thakkar, M. Shahbakhti, " Grey-box Modeling and Control of HCCI Engine Emissions ", American Control Conference, 6 pages, Jun. 4-6, 2014, Portland, OR, USA.

  45. M. Amini, M. Shahbakhti, A. Ghaffari, " A Novel Singular Perturbation Technique for Model-Based Control of Cold Start Hydrocarbon Emission ", SAE World Congress, SAE Paper No. 2014-01-1547, 13 pages, Apr. 8-10, 2014, Detroit, MI, USA.

  46. M. Bidarvatan, M. Shahbakhti, " Integrated HCCI Engine Control based on a Performance Index ", ASME Internal Combustion Engine Division Fall Technical Conference, Paper No. ICEF2013-19097, 11 pages, Oct. 13-16, 2013, Dearborn, Michigan, USA.

  47. M. Bidarvatan, M. Shahbakhti, " Grey-Box Modeling for HCCI Engine Control ", ASME Internal Combustion Engine Division Fall Technical Conference, Paper No. ICEF2013-19107, 10 pages, Oct. 13-16, 2013, Dearborn, Michigan, USA.

  48. M. Boudaghi, M. Shahbakhti, S. A. Jazayeri, " A New Physics-based Misfire Detection Technique for a SI Engine ", ASME Internal Combustion Engine Division Fall Technical Conference, Paper No. ICEF2013-19096, 12 pages, Oct. 13-16, 2013, Dearborn, Michigan, USA.

  49. M. Maasoumy, B. Moridian, M. Razmara, M. Shahbakhti, A. Sangiovanni-Vincentelli, " On-line Simultaneous State Estimation and Parameter Adaptation for Building Predictive Control ", ASME Dynamic Systems and Control Conference, 9 pages, Oct. 21-23, 2013, Palo Alto, CA, USA. (Selected as the top six best student papers out of 406 conference paper submissions.)

  50. R. Salehi, M. Shahbakhti, A. Alasty, G. Vossoughi, " On-line Fault Detection and Isolation (FDI) for the Exhaust Path of a Turbocharged SI Engine ", ASME Dynamic Systems and Control Conference, 10 pages, Oct. 21-23, 2013, Palo Alto, CA, USA.

  51. B. Bahri, A. A. Aziz, M. F. Muhamad Said, M. Shahbakhti, " Misfiring Cycle Pressure Measurement for Diesel-converted HCCI Engine ", ICA Int. Conference on Instrumentation, Control and Automation, 6 pages, Aug. 28-30, 2013, Bali, Indonesia.

  52. B. Bahri, A. A. Aziz, M. Shahbakhti, M. F. Muhamad Said, " Ethanol Fuelled HCCI Engine: A Review ", Int. Conference on Mechanical, Aeronautical and Automotive Engineering, 7 pages, Jul. 4-5, 2013, SG, Singapore.

  53. M. Bidarvatan, M. Shahbakhti, " Two-Input Two-Output Control of Blended Fuel HCCI Engines ", Proceeding of SAE World Congress, SAE Paper No. 2013-01-1663, 15 pages, April 16-18, 2013, Detroit, USA.

  54. R. Salehi, M. Shahbakhti, J. K. Hedrick, " Hybrid Switching Control of Automotive Cold Start Hydrocarbon Emission ", Proceeding of American Control Conference, 6 pages, June 17-19, 2013, Washington, DC, USA

  55. K. Edelberg, M. Shahbakhti, J. K. Hedrick, " Incorporation of Implementation Imprecision in Automotive Control Design ", Proceeding of American Control Conference, 6 pages, June 17-19, 2013, Washington, DC, USA.

  56. R. Salehi, M. Shahbakhti, A. Alasty, G.R. Vossoughi, " Control Oriented Radial Turbine Model for a Gasoline Engine ", Proceeding of American Control Conference, 6 pages, June 17-19, 2013, Washington, DC, USA.

  57. R. Salehi, M. Shahbakhti, A. Alasty, G.R. Vossoughi, " Nonlinear Observer Design for Turbocharger in a SI Engine ", Proceeding of American Control Conference, 6 pages, June 17-19, 2013, Washington, DC, USA.

  58. B. Bahri, A. A. Aziz, M. Shahbakhti, M. F. Muhamad Said, " A Diagnosis Technique for the Identification of Misfire in a Converted-Diesel HCCI Engine ", Proceeding of 13th WSEAS Int. Conference on Robotics, Control and Manufacturing Technology, 6 pages, April 2-4, 2013, Kuala Lumpor, Malaysia.

  59. A. Hansen, M. Shahbakhti, J. K. Hedrick, " Impact of Implementation Imprecision on Sliding Mode Controller Design of Automotive Cold Start Emissions ", 2012 ASME Dynamic Systems and Control Conference, 10 pages, October 17-19, 2012, Fort Lauderdale, FL, USA. (Received Best Paper Award, ASME Automotive and Transportation Systems Technical Committee.)

  60. M. Shahbakhti, J. Li, J. K. Hedrick, " Early Model-Based Verification of Automotive Control System Implementation ", 2012 American Control Conference, 6 pages, June 27-29, 2012, Montreal, Canada.

  61. A. Cranmer, M. Shahbakhti, J. K. Hedrick, " Grey-Box Modeling of Rotational Dynamics in Automotive Engines ", 2012 American Control Conference, 6 pages, June 27-29, 2012, Montreal, Canada.

  62. B. Bahri, A. A. Aziz, M. F. Muhamad Said, M. Shahbakhti, " Artificial Neural Network Model for Predicting Exhaust Temperature of an Ethanol-Fueled HCCI Engine ", 4 pages, 2012 JSAE Annual Congress, JSAE Paper No. 20125168, May 23-25, 2012, Yokohama, Japan.

  63. M. Bidarvatan, M. Shahbakhti, S. A. Jazayeri, " Model-Based Control of Combustion Phasing in an HCCI Engine ", 2012 SAE World Congress, SAE Paper No. 2012-01-1137, 17 pages, April 24-26, 2012.

  64. M. Shahbakhti, A. Ghazimirsaied, C. R. Koch, " Modeling Ranges of Cyclic Variability for Ignition Timing Control of HCCI Engines ", ASME Dynamic Systems and Control Conference, 8 pages, Oct. 31 - Nov. 2, 2011, Arlington, USA.

  65. S. Asami, A. Cranmer, M. Shahbakhti, J. K. Hedrick, " Model-based Control via Balanced Realization for Automotive Cold Start Hydrocarbon Reduction ", ASME Dynamic Systems and Control Conference, 8 pages, Oct. 31 - Nov. 2, 2011, Arlington, USA.

  66. K. Ebrahimi, M. Shahbakhti, C. R. Koch, " Comparison of Butanol/n-Heptane to PRF Blended Fuels in HCCI Engines ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS11-34, 6 pages, May 8-11, 2011, Winnipeg, Canada.

  67. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " Ignition Timing Criteria for Partial Burn Operation in an HCCI Engine ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS11-33, 6 pages, May 8-11, 2011, Winnipeg, Canada.

  68. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " Comparison of Crank Angle Based Ignition Timing Methods on an HCCI Engine ", Proceeding of ASME Internal Combustion Engine Division Fall Technical Conference, Paper No. ICEF2010-35087, 12 pages, Sept. 12-15, 2010, San Antonio, USA.

  69. M. Shahbakhti, A. Ghazimirsaied, C. R. Koch, " Combustion Characteristics of Butanol/n-Heptane Blend Fuels in an HCCI Engine ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS10-A018, 6 pages, May 9-12, 2010, Ottawa, Canada.

  70. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " Recognizing Partial Burn Operation in an HCCI Engine ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS10-A017, 6 pages, May 9-12, 2010, Ottawa, Canada.

  71. M. Shahbakhti, A. Ghazimirsaied, C. R. Koch, " Predicting the Distribution of Combustion Timing Ensemble in an HCCI Engine ", ASME Internal Combustion Engine Division Spring Technical Conference, Paper No. ICES2009-76007, 12 pages, May 3-6, 2009, Milwaukee, Wisconsin, USA.

  72. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " Nonlinear Dynamics in Cyclic Variations of Combustion Phasing in an HCCI Engine ", ASME Internal Combustion Engine Division Spring Technical Conference, Paper No. ICES2009-76157, 7 pages, May 3-6, 2009, Milwaukee, Wisconsin, USA.

  73. M. Shahbakhti, A. Ghazimirsaied, C. R. Koch, " The Effect of Operating Conditions on HCCI Exhaust Gas Temperature ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS-A02, 6 pages, May 10-13, 2009, Montréal , Canada .

  74. A. Ghazimirsaied, M. Shahbakhti, C. R. Koch, " Partial-Burn Crank Angle Limit Criteria Comparison on an Experimental HCCI Engine ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, Paper No. CICS-A52, 6 pages, May 10-13, 2009, Montréal , Canada .

  75. M. Shahbakhti, C. R. Koch, " Dynamic Modeling of HCCI Combustion Timing in Transient Fueling Operation ", Proceeding of SAE World Congress, SAE Paper No. 2009-01-1136, 16 pages, April 20-23, 2009, Detroit, USA.

  76. A. Ghazimirsaied, M. Shahbakhti, A. Audet, C. R. Koch, " HCCI Engine Cyclic Variation Characterization Using Both Chaotic and Statistical Approach ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, 6 pages, May 12-14, 2008, Toronto, Canada.

  77. M. Shahbakhti, R. Lupul, C. R. Koch, " Sensitivity Analysis & Modeling of HCCI Auto-Ignition Timing", Proceeding of the Fifth IFAC Symposium on Advances in Automotive Control, pages 303 - 310, August 20-22, 2007, Monterey Coast, California, USA.

  78. M. Shahbakhti, C. R. Koch, " Control Oriented Modeling of Combustion Phasing for an HCCI Engine ", Proceeding of 2007 American Control Conference, pages 3694-3699, July 11-13, 2007, New York, USA.

  79. M. Shahbakhti, R. Lupul, A. Audet, C. R. Koch, " Experimental Study of HCCI Cyclic Variations for Low-Octane PRF Fuel Blends ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, 6 pages, May 13-16, 2007, Banff, Canada.

  80. M. Shahbakhti, R. Lupul, C. R. Koch, " Cyclic Variations of Ignition Timing in an HCCI Engine ", Proceeding of Annual ASME/IEEE Joint Rail Conference (JRC) and the ASME Internal Combustion Engine Division (ICED) Conference, Paper No. JRCICE2007/40032, 11 pages, March 13-16, 2007, Pueblo, Colorado, USA.

  81. M. Shahbakhti, C. R. Koch, " Thermo-kinetic Combustion Modeling of an HCCI Engine to Analyze Ignition Timing for Control Applications ", Proceeding of Combustion Institute-Canadian Section (CICS) Spring Technical Conference, 6 pages, May 13-16, 2007, Banff, Canada.

  82. M. Shahbakhti, R. Lupul, C. R. Koch, " Predicting HCCI Ignition Timing by Extending a Modified Knock-Integral Method ", Proceeding of SAE World Congress, SAE Paper No. 2007-01-0222, 13 pages, April 16-19, 2007, Detroit, USA.
  83. S. Sharifi Rad, S. A. Jazayeri, M. Shahbakhti, " Automatic Driver Design and Longitudinal Dynamic Simulation for Passenger Cars ", Proceeding of SAE World Congress, SAE Paper No. 2006-01-1015,  9 pages, April 3-7, 2006, Detroit, USA.
  84. K. Swan, M. Shahbakhti, C. R. Koch, " Predicting Start of Combustion Using a Modified Knock-Integral Method for an HCCI Engine ", Proceeding of SAE World Congress, SAE Paper No. 2006-01-1086, 10 pages, April 3-7, 2006, Detroit, USA.
  85. S. Sharifi Rad, S. A. Jazayeri, M. Shahbakhti, " Simulation of Vehicle Dynamics and Design of an Auto-driver for ECE Driving Cycles ", Proceeding of 4th International Conference on Internal Combustion Engines (ICICE), 9 pages, November 16-17, 2005, Tehran, Iran.
  86. M. Shahbakhti, S. A. Jazayeri, M. Ghafuri, A. R. Aslani, A. Sahraeian, S. Azadi, " A Novel Method to Estimate Parameters of the Wall-Wetting Fuel Model in MPFI Engines for Cold Start and Warm up Conditions ", Proceeding of ASME Internal Combustion Engine Fall Technical Conference, 12 pages, October 24-27, 2004, Long Beach, CA, USA.
  87. A. Sahraeian, M. Shahbakhti, A. R. Aslani, S. A. Jazayeri, S. Azadi, A. H. Shamekhi, " Longitudinal Vehicle Dynamics Modeling on the Basis of Engine Modeling ", Proceeding of SAE World Congress, SAE Paper No. 2004-01-1620, 11 pages, March 8-11, 2004, Detroit, USA.
  88. A. R. Aslani, M. Shahbakhti, A. Sahraeian, S. M. Hoseinalipoor, S. A. Jazayeri, " Dynamic Modeling of a Port Fuel-Injected Engine with Sensitivity Analysis ", Proceeding of SAE World Congress, SAE Paper No. 2004-01-1771, 9 pages, March 8-11, 2004, Detroit, USA.
  89. M. Shahbakhti, S. A. Jazayeri, M. Ghafuri, A. R. Aslani, A. Sahraeian, S. Azadi, " Control Oriented Modeling of Mixture Formation in MPFI Engines to Predict Air-Fuel-Ratio in Transient Conditions ", Proceeding of 3rd International Conference on Internal Combustion Engines (ICICE), 15 pages, February 17-19, 2004, Tehran, Iran.
  90. A. Sahraeian, M. Shahbakhti, A. R. Aslani, " Development and Use of a Vehicle Power-train Simulation for Fuel Economy and Performance Studies ", Proceeding of 3rd International Conference on Internal Combustion Engines (ICICE), 11 pages, February 17-19, 2004, Tehran, Iran.
  91. A. R. Aslani, M. Shahbakhti, A. Sahraeian, S. M. Hoseinalipoor, " Control Oriented Modeling of Paykan Injection Engine ", Proceeding of 3rd International Conference on Internal Combustion Engines (ICICE), 9 pages, February 17-19, 2004, Tehran, Iran.
  92. M. Shahbakhti, S. A. Jazayeri, A. R. Aslani, M. Ghafuri, S. Azadi, " Identification of Dynamic Fuel Parameters in PFI Engines for Different Thermal Conditions ", Proceeding of 7th International and 11th Annual Mechanical Engineering Conference, ISME, Vol. 2, pages 743-760, 2003, Mashhad, Iran.
  93. M. Shahbakhti, A. Mohsenian rad, S. A. Jazayeri, S. Azadi, " An Investigation into the Effective Methods to Reduce Emissions of Passenger Cars During Cold Start and Warm up Conditions ", Proceeding of 7th International and 11th Annual Mechanical Engineering Conference, ISME, Vol. 2, pages 702-718, 2003, Mashhad, Iran.
  94. A. R. Aslani, M. Shahbakhti, S. M. Hoseinalipoor, S. A. Jazayeri, A. Ohadi, S. Azadi, " Dynamic Modeling of a Port Fuel Injection Engine for Air/Fuel Ratio Determination ", Proceeding of 7th International and 11th Annual Mechanical Engineering Conference, ISME, Vol. 2, pages 773-785, 2003, Mashhad, Iran.

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Non-refereed Technical Papers

  1. B. Chen, D. Robinette, M. Shahbakhti, K. Zhang, J. Naber, " Connected Vehicles and Powertrain Optimization ", Invited article, 9 pages, ASME Dynamic System Control Magazine, 2017.

  2. J. K. Hedrick and M. Shahbakhti, " Model-based Verification of Automotive Control System Implementation ", Keynote paper, 8 pages, Int. Conference on Advanced Vehicle Technologies and Integration (VTI), Jul. 16-19, 2012, Changchum, China.

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Technical Presentation Papers (refereed abstract & oral presentation)

  1. A. Solouk, M. Shahbakhti, " Fuel Economy Benefits of Electrified Powertrains with Advanced Combustion Engines: Mild to Strong HEV Applications ", Proceeding of 2017 SIA Int. Powertrain Conference, 7 pages, Jun. 7-8, 2017, Versailles, France.

  2. A. Solouk, M. Shahbakhti, " Potential of Low Temperature Combustion (LTC) Engine Technology for Range Extender Vehicles ", Proceeding of 2016 SAE Range Extenders for Electric Vehicles Symposium, Nov. 2-3, 2016, Knoxville, TN, USA.

  3. M. Nazemi, S. Polat, M. Shahbakhti, " Advanced Combustion Model of LTC Engines ", CONVERGE™ User Group Meeting, Sept. 23-25, 2014, Madison, Wisconsin, USA.

  4. M. Shahbakhti, K. Edelberg, S. Pan, A. Hansen, J. Li, J. K. Hedrick, " Model-Based Verification and Real-Time Validation of Automotive Controller Software ", Proceeding of ASME Verification and Validation Symposium, May 22-24, 2013, Las Vegas, NV, USA.

  5. K. Edelberg, M. Shahbakhti, J. K. Hedrick, " Modeling and Incorporation of Software Implementation Uncertainty to Realize Easily Verifiable Automotive Controllers ", Proceeding of ASME Verification and Validation Symposium, May 22-24, 2013, Las Vegas, NV, USA.

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M. Shahbakhti