Photo of Asok Ray

Asok Ray

Distinguished Professor

Affiliation(s):

  • Mechanical Engineering
  • Nuclear Engineering
  • Center for Acoustics and Vibration

329 Reber Building

axr2@psu.edu

814-865-6377

Personal or Departmental Website

Research Areas:

Energy Systems; Mechanical Sciences; Nuclear Power; Sensors & Controls

Interest Areas:

Machine Learning, Instrumentation & Control, Information Theory, Signal Processing, and Nonlinear Dynamics & Chaos

 
 

 

Education

Publications

Books

  • N. Nayak and Asok Ray, 1993, Intelligent seam tracking for robotic welding, Springer Verlag, London, U.K.

Journal Articles

  • Susheel Dharmadhikari, R Riddhiman, Chandrachur Bhattacharya, Asok Ray and Amrita Basak, 2022, "Assessment of Transfer Learning Capabilities for Fatigue Damage Classification and Detection in Aluminum Specimens with Different Notch Geometries", Metals: An MDPI Journal
  • Najah Ghalyan, Asok Ray and William K Jenkins, 2022, "A Concise Tutorial on Functional Analysis for Applications to Signal Processing", Sci: An MDPI Journal
  • Samer Saab, Shashi Phoha, Minghui Zhu and Asok Ray, 2022, "An Adaptive Polyak Heavy-Ball Method", Machine Learning
  • Xiangyi Chen and Asok Ray, 2022, "Deep Reinforcement Learning Control of a Boiling Water Reactor", IEEE Transactions on Nuclear Science
  • Najah F Ghalyan, Chandrachur Bhattacharya, Ibrahim F Ghalyan and Asok Ray, 2022, "Spectral invariants of ergodic symbolic systems for pattern recognition and anomaly detection", Philosophical Transactions A of the Royal Society
  • Hassan Alqahtani and Asok Ray, 2022, "Feature Extraction and Neural Network-based Fatigue Damage Detection and Classification", Neural Computing and Applications
  • Chandrachur Bhattacharya, Jacqueline O'Connor and Asok Ray, 2022, "Data-driven Detection and Early Prediction of Thermoacoustic Instability in a Multi-nozzle Combustor", Combustion Science and Technology, 194, (7)
  • Sinjan Ghosh, R Wardell, E Farnandez, Jagjit S Kapat, Sudeepta Mondal and Asok Ray, 2022, "Topology Optimization and Experimental Validation of an Additively Manufactured U-bend Channel", ASME Journal of Fluid Engineering
  • Sudeepta Mondal, Somnath De, Achintya Mukhopadhyay, Swarnendu Sen and Asok Ray, 2022, "Early Prediction of Lean Blowout from Chemiluminescence Time Series Data", Combustion Science and Technology, 194, (6)
  • Xiangyi Chen, Asok Ray and Fan Zhang, 2022, "Point-kinetics neutron noise modeling and analysis via probabilistic finite state automata", Nuclear Engineering and Design
  • Samer Saab, K Saab, Shashi Phoha, Minghui Zhu and Asok Ray, 2022, "A Multivariate Adaptive Gradient Algorithm with Reduced Tuning Efforts Learning Systems", Neural Networks
  • Samer Saab, Yiwei Fu, Asok Ray and Michael hauser, 2022, "A Dynamically Stabilized Recurrent Neural Network", Neural Processing Letters
  • Ibrahim Ghalyan, Najah Ghalyan and Asok Ray, 2022, "Optimal Window-Symbolic Time Series Analysis for Pattern Classification and Anomaly Detection", IEEE Transactions on Industrial Informatics
  • Chandrachur Bhattacharya and Asok Ray, 2022, "Thresholdless Classification of Chaotic Dynamics and Combustion Instability via Probabilistic Finite State Automata", Mechanical Systems and Signal Processing
  • Hassan Alqahtani and Asok Ray, 2022, "Fatigue damage detection and risk assessment via neural network modeling of ultrasonic signals", Fatigue & Fracture of Engineering Materials & Structures
  • Asok Ray, 2022, "On State-space Modeling and Signal Localization in Dynamical Systems", ASME Letters in Dynamic Systems and Control
  • Hassan Alqahtani and Asok Ray, 2022, "Feature Selection of Surface Topography Parameters for Fatigue Damage Detection Using Pearson Correlation Method and Neural Network Analysis", Fatigue & Fracture of Engineering Materials & Structures
  • Asok Ray, S. Bahrampour, J. Rostami, A. Naeimipour and C. Craig, 2015, "Ground characterization and roof mapping: Online sensor signal-based change detection", International Journal of Mining Science and Technology, 25, (6), pp. 905 - 913
  • Asok Ray, Y. Li and P. Chattopadhyay, 2015, "Dynamic data-driven identification of battery state-of-charge via symbolic analysis of input-output pairs", Journal of Applied Energy, 45, (6), pp. 1587-1604
  • Asok Ray, K. Jerath, S. Brennan and V. Gayah, 2015, "Dynamic prediction of vehicle cluster distribution: A statistical mechanics-inspired method", IEEE Trans. Intelligent Transportation Systems, 16, (5), pp. 2424 - 2434
  • Asok Ray, S. Sarkar, A. Mukhopadhyay and S. Sen, 2015, "Dynamic data-driven prediction of lean blowout in a swirl-stabilized combustor", International Journal of Spray and Combustion Dynamics, 7, (3), pp. 209 - 242
  • Asok Ray, Y. Li, P. Chattopadhyay and C. Rahn, 2015, "Identification of the Battery State-of-Health Parameter from Input-Output Pairs of Time Series Data", Journal of Power Sources, 285, pp. 235 - 246
  • Asok Ray, D. K. Jha, Y. Li and T. A. Wettergren, 2015, "Robot path planning in uncertain environments: A language measure-theoretic approach", ASME Journal of Dynamic Systems, Measurement and Control, 137, pp. 034503-1 to 034503-7
  • S. Bahrampour, Asok Ray, S. Sarkar, T. Damarla and N. Nasrabadi, 2013, "Performance comparison of feature extraction algorithms for target detection and classification", Pattern Recognition Letters, 34, (16), pp. 2126-2134
  • S. Sarkar, S. Sarkar, K. Mukherjee, Asok Ray and S. Srivastav, 2013, "Multi-sensor information fusion for fault detection in aircraft gas turbine engines", IMechE Journal of Aerospace Engineering, 227, (12), pp. 1988-2001
  • S. Phoha and Asok Ray, 2013, "An artificial language for data-driven self-adaptation of networked robots in dynamic environments", International Journal of Systems and Control, 4, pp. 375-387
  • Asok Ray, S. Phoha and S. Sarkar, 2013, "Behavior prediction for decision & control in cognitive autonomous systems", New Mathematics and Natural Computation: Special Issue on Engineering of the Mind, Cognitive Science and Robotics, 9, (3), pp. 263-271
  • Y. Wen, Asok Ray and S. Phoha, 2013, "Hilbert space formulation of symbolic systems signal representation and analysis", Signal Processing, 93, (9), pp. 2594-2611
  • S. Sarkar, K. Mukherjee and Asok Ray, 2013, "Distributed decision propagation in mobile-agent proximity networks", International Journal of Control, 86, (6), pp. 1118-1130
  • S. Phoha and Asok Ray, 2013, "An artificial probabilistic language for data-driven self-adaptation of networked robots in dynamic environments"
  • D. K. Jha, Asok Ray, K. Mukherjee and S. Chakraborty, 2013, "Classification of two-phase flow patterns by ultrasonic sensing", ASME Journal of Dynamic Systems, Measurement, and Control, 135, pp. 24503-1 - 24503-5
  • S. Sarkar, K. Mukherjee, S. Sarkar and Asok Ray, 2013, "Symbolic dynamic analysis of transient time series for fault detection in gas turbine engines", ASME Journal of Dynamic Systems, Measurement, and Control, 135
  • A. Mukhopadhyay, R. Chaudhuri, T. Paul, S. Sen and Asok Ray, 2013, "Prediction of lean blow-out in gas turbine combustors using symbolic time series analysis", Journal of Propulsion and Power, 29, (4), pp. 950-960
  • Y. Wen, Asok Ray and Q. Du, 2013, "A variance-estimation-based stopping rule for symbolic dynamic filtering", Signal, Image, and Video Processing, 7, (1), pp. 189-195
  • Y. Wen, K. Mukherjee and Asok Ray, 2013, "Adaptive pattern classification for symbolic dynamic systems", Signal Processing, 93, (1), pp. 252-260
  • S. Chakraborty, E. Keller, Asok Ray and J. Mayer, 2013, "Detection and estimation of demagnetization faults in permanent magnet synchronous motors", Electric Power Systems Research, 96, (1), pp. 225-236
  • S. Sarkar, K. Mukherjee, Asok Ray, A. Srivastav and T. A. Wettergren, 2012, "Statistical mechanics-inspired modeling of heterogeneous packet transmission in communication networks", IEEE Transactions on Systems, Man, and Cybernetics, Part B, 42, (4), pp. 1083-1093
  • Y. Wen and Asok Ray, 2012, "Vector space formulation of probabilistic finite state automata", Journal of Computer and System Sciences, 78, (4), pp. 1127-1141
  • D. Singh, S. Gupta and Asok Ray, 2012, "Online recursive estimation of remaining life using ultrasonic measurements", Structural Health Monitoring, 78, (4), pp. 1127-1141
  • G. Mallapragada, Asok Ray and X. Jin, 2012, "Symbolic dynamic filtering and language measure for behavior identification of mobile robots", IEEE Transactions on Systems, Man, and Cybernetics, Part B, 42, (3), pp. 647-659
  • X. Jin, S. Sarkar, Asok Ray, S. Gupta and T. Damarla, 2012, "Target detection and classification using seismic and PIR sensors", IEEE Sensors Journal, 12, (6), pp. 1709-1718
  • D. K. Jha, D. S. Singh, S. Gupta and Asok Ray, 2012, "Fractal analysis of crack initiation in polycrystalline alloys using surface interferometry", European Physics Letters, 98, pp. 6
  • S. Chakraborty, S. Sarkar and Asok Ray, 2012, "Symbolic identification for fault detection in aircraft gas turbine engines", Proceedings of the I Mech E Part G: Journal of Aerospace Engineering, 226, (4), pp. 422-436
  • S. Sarkar, K. Mukherjee, X. Jin, D. Singh and Asok Ray, 2012, "Optimization of symbolic feature extraction for pattern classification", Signal Processing, 92, (3), pp. 625-635
  • S. Phoha, G. Mallapragada, Y. Wen, D. Bein and Asok Ray, 2012, "Designing a fusion-driven sensor network to selectively track mobile targets", Parallel Processing Letters, 22, (1), pp. 15
  • P. Adenis, Y. Wen and Asok Ray, 2012, "An inner product space on irreducible and synchronizable probabilistic finite state automata", Mathematics of Control, Signals, and Systems (MCSS), 23, (1), pp. 281-310
  • S. Sarkar, X. Jin and Asok Ray, 2011, "Data-driven fault detection in aircraft engines with noisy sensor measurements", Journal of Engineering for Gas Turbines and Power-Transactions of the ASME, 133, (8), pp. 10
  • X. Jin, S. Gupta, K. Mukherjee and Asok Ray, 2011, "Wavelet-based feature extraction using probabilistic finite state automata for pattern classification", Pattern Recognition, 44, (7), pp. 1343-1356
  • K. Mukherjee, S. Gupta, Asok Ray and T. Wettergren, 2011, "Statistical mechanics-inspired optimization of sensor field configuration for detection of mobile targets", IEEE Transactions on Systems, Man, and Cybernetics, Part B, 41, (3), pp. 783-791
  • K. S. Balagani, V. V. Phoha, Asok Ray and S. Phoha, 2011, "On the discriminability of keystroke feature vectors", Pattern Recognition Letters, 32, (7), pp. 1070-1080
  • K. Mukherjee, S. Gupta, Asok Ray, C. Rao and S. Phoha, 2011, "Symbolic pattern analysis of sonar data for underwater target detection", IEEE Journal of Oceanic Engineering, 36, (2), pp. 219-230
  • D. Bien, Y. Wen, S. Phoha, B. Madan and Asok Ray, 2011, "Distributed network control for mobile multi-modal wireless sensor networks", Journal of Parallel and Distributed Computing, 71, (3), pp. 460-470
  • X. Jin, Y. Guo, S. Sarkar, Asok Ray and R. M. Edwards, 2011, "Anomaly detection in nuclear power plants via symbolic dynamic filtering", IEEE Transactions on Nuclear Science, 58, (1), pp. 277-288
  • K. Mukherjee, Asok Ray, T. Wettergren, S. Gupta and S. Phoha, 2011, "Real-time adaptation of decision thresholds in sensor networks for detection of moving targets", Automatica, 47, (1), pp. 185-191
  • S. Chakraborty, Asok Ray, A. Subbu and E. Keller, 2010, "Analytic signal space partitioning and symbolic dynamic filtering for degradation monitoring of electric motors", Signal, Image, and Video Processing, 4, (4), pp. 399-403
  • Y. Wen and Asok Ray, 2010, "A stopping rule for symbolic dynamic filtering", Applied Mathematics Letters, 23, (9), pp. 1125-1128
  • A. Subbu, A. Srivastav, Asok Ray and E. Keller, 2010, "Symbolic dynamic filtering for image analysis: Theory and experimental validation", Signal, Image, and Video Processing, 4, (3), pp. 319-329
  • X. Jin, R. M. Edwards and Asok Ray, 2010, "Feature extraction for data-driven fault detection in nuclear power plants", Trans. Am. Nuc. Soc., 102, pp. 163-164
  • X. Jin, Asok Ray and R. M. Edwards, 2010, "Integrated robust and resilient control of nuclear power plants for operational safety and high performance", IEEE Transactions on Nuclear Science, 57, (2), pp. 807-817
  • I. Chattopadhyay and Asok Ray, 2010, "Optimal control of infinite horizon partially observable decision processes modeled as generators of probabilistic regular languages", International Journal of Control, 83, (3), pp. 457-483
  • D. S. Singh, S. Gupta and Asok Ray, 2010, "Symbolic dynamic analysis of surface deformation during fatigue crack initiation", Measurement Science and Technology, 21, (3), pp. 7
  • A. Srivastav and Asok Ray, 2010, "Self-organization of sensor networks for detection of pervasive faults", Signal, Image, and Video Processing, 4, (1), pp. 99-104
  • I. Chattopadhyay and Asok Ray, 2009, "Supervised self-organization of homogeneous swarms using projections of Markov chains", IEEE Transactions on Systems, Man, and Cybernetics, Part B, 39, (6), pp. 1505-1515
  • A. Srivastav, Asok Ray and S. Phoha, 2009, "Adaptive sensor activity scheduling in distributed sensor networks: A statistical mechanics approach", International Journal of Distributed Sensor Networks, 5, (3), pp. 242-261
  • S. Gupta, Asok Ray and S. Phoha, 2009, "Generalized Ising model for dynamic adaptation in autonomous systems", European Physics Letters (EPL), 87, pp. p. 10009
  • C. Rao, K. Mukherjee, S. Sarkar and Asok Ray, 2009, "Statistical estimation of multiple parameters via symbolic dynamic filtering", Signal Processing, 89, (6), pp. 981-988
  • S. Sarkar, K. Mukherjee and Asok Ray, 2009, "Generalization of Hilbert transform for symbolic analysis of noisy signals", Signal Processing, 89, (6), pp. 1245-1251
  • I. Chattopadhyay, G. Mallapragada and Asok Ray, 2009, "v*: A robot path planning algorithm based on renormalized measure of probabilistic regular languages", International Journal of Control, 82, (5), pp. 849-867
  • S. Chakraborty, E. Keller, J. Talley, A. Srivastav, Asok Ray and S. Kim, 2009, "Void fraction measurement in two-phase processes via symbolic dynamic filtering of ultrasonic signals", Measurement Science and Technology, 20, (2)
  • A. Srivastav, Asok Ray and S. Gupta, 2009, "An information-theoretic measure for anomaly detection in complex dynamical systems", Mechanical Systems and Signal Processing, 23, (2), pp. 358-371
  • S. Gupta and Asok Ray, 2009, "Statistical mechanics of complex systems for pattern identification", Journal of Statistical Physics, 134, (2), pp. 337-364
  • C. Rao, Asok Ray, S. Sarkar and M. Yasar, 2009, "Review and comparative evaluation of symbolic dynamic filtering for detection of anomaly patterns", Signal, Image, and Video Processing, 3, (2), pp. 101-114
  • S. Sarkar, C. Rao and Asok Ray, 2009, "Statistical estimation of multiple faults in aircraft gas turbine engines", Proceedings of the I Mech E Part G: Journal of Aerospace Engineering, 223, (4), pp. 415-424
  • X. Jin, K. Mukherjee, S. Gupta, Asok Ray, S. Phoha and T. Damarla, 2009, "Asynchronous data-driven classification of weapon systems", Measurement Science and Technology, 20, pp. 6
  • D. S. Singh, S. Gupta and Asok Ray, 2009, "In-situ fatigue damage monitoring using symbolic dynamic filtering of ultrasonic signals", Proceedings of the I Mech E Part G: Journal of Aerospace Engineering, 223, (6), pp. 643-653
  • M. Holmes and Asok Ray, 2001, "Fuzzy damage mitigating control of a fossil power plant", IEEE Transactions on Control Systems Technology, 9, (1), pp. 140-147
  • B.-S. Hong and Asok Ray, 2001, "Observer-embedded L 2-gain control", Applied Mathematics Letters, 14, (5), pp. 563-569
  • Asok Ray, M. Holmes and C. F. Lorenzo, 2001, "Life extending controller design for reusable rocket engines", The Aeronautical Journal, 105, (1048), pp. 315-322
  • J. Caplin, Asok Ray and S. M. Joshi, 2001, "Robust damage-mitigating control of aircraft for high performance and structural durability", IEEE Transactions- on Aerospace and Electronic Systems, 37, (3), pp. 849-862
  • C. F. Lorenzo, Asok Ray and M. Holmes, 2001, "Nonlinear control of a reusable rocket engine for life extension", AIAA Journal of Propulsion and Power, 17, (5), pp. 998-1004
  • Asok Ray and R. Patankar, 2001, "Fatigue crack growth under variable-amplitude loading: Part I—Model formulation in state-space setting", Applied Mathematical Modelling, 25, (11), pp. 979-994
  • Asok Ray and R. Patankar, 2001, "Fatigue crack growth under variable-amplitude loading: Part II—Code development and model validation", Applied Mathematical Modelling, 25, (11), pp. 995-1013
  • C. F. Lorenzo, M. Holmes and Asok Ray, 2000, "Nonlinear life-extending control of a rocket engine", AIAA Journal of Guidance, Control, and Dynamics, 23, (4), pp. 759-762
  • Asok Ray and J. Caplin, 2000, "Life extending control of aircraft: Trade-off between flight performance and structural durability", The Aeronautical Journal, 104, (1039), pp. 397-408
  • S. J. Pinchak and Asok Ray, 2000, "Pilot safety enhancement for on-board ground collision avoidance systems", Aeronautical Engineering and Aerospace Technology, 72, (5), pp. 422-429
  • Asok Ray and S. Phoha, 2000, "Calibration and estimation of redundant signals", Automatica, 36, (10), pp. 1525-1534
  • H. Zhang, Asok Ray and S. Phoha, 2000, "Hybrid life-extending control of mechanical systems: Experimental validation of the concept", Automatica, 36, (1), pp. 23-36
  • P. Kallappa and Asok Ray, 2000, "Fuzzy wide-range control of fossil power plants for life extension and robust performance", Automatica, 36, (1), pp. 69-82
  • B-S. Hong, V. Yang and Asok Ray, 2000, "Robust feedback control of combustion instability with modeling uncertainty", Combustion and Flame, 120, pp. 91-106
  • R. Patankar and Asok Ray, 2000, "State-space modeling of fatigue crack growth in ductile alloys", Engineering Fracture Mechanics, 66, (2), pp. 136-151
  • H. Zhang, Asok Ray and R. Patankar, 2000, "Damage-mitigating control with overload injection: Experimental validation of the concept", ASME Journal of Dynamic Systems, Measurement, and Control, 122, (2), pp. 336-342
  • Asok Ray and R. Patankar, 1999, "A stochastic model of fatigue crack propagation under variable-amplitude loading", Engineering Fracture Mechanics, 62, (4), pp. 477-493
  • N-C. Tsai and Asok Ray, 1999, "Compensatability and optimal compensation under randomly varying delays", International Journal of Control, 72, (9), pp. 826-832
  • Asok Ray and S. Phoha, 1999, "Stochastic modeling of fatigue crack damage for information-based maintenance", Annals of Operations Research, 91, pp. 191-204
  • R. Patankar and Asok Ray, 1999, "Damage mitigating controller design for structural durability", IEEE Transactions on Control Systems Technology, 7, (5), pp. 606-612
  • H. Zhang and Asok Ray, 1999, "Robust damage-mitigating control of mechanical structures: Experimental validation on a test apparatus", ASME Journal of Dynamic Systems, Measurement, and Control, 121, (3), pp. 377-385
  • Asok Ray, 1999, "Stochastic modeling of fatigue crack damage for risk analysis and remaining life prediction", ASME Journal of Dynamic Systems, Measurement, and Control, 121, (3), pp. 386-393
  • S. Tangirala, M. Holmes, Asok Ray and M. Carpino, 1998, "Life-extending control of mechanical structures: Experimental verification of the concept", Automatica, 34, (1), pp. 3-14
  • Asok Ray, S. Phoha and S. Tangirala, 1998, "Stochastic modelling of fatigue crack propagation", Applied Mathematical Modelling, 22, pp. 197-204
  • M. Holmes and Asok Ray, 1998, "Fuzzy damage mitigating control of mechanical structures", ASME Journal of Dynamic Systems, Measurement, and Control, 120, (2), pp. 249-256
  • E. Yaz and Asok Ray, 1998, "Linear unbiased state estimation for randomly varying sensor delay", Applied Mathematics Letters, 11, (4), pp. 27-32
  • J. N. Rozak and Asok Ray, 1998, "Robust multivariable control of rotorcraft in forward flight: Impact of bandwidth on fatigue life", Journal of the American Helicopter Society, 43, (3), pp. 195-201
  • R. Patankar, Asok Ray and A. Lakhtakia, 1998, "A state-space model of fatigue crack growth", International Journal of Fracture, 90, (3), pp. 235-249
  • C-K. Weng and Asok Ray, 1997, "Robust wide-range control of steam-electric power plants", IEEE Transactions on Control Systems Technology, 5, (1), pp. 74-88
  • Asok Ray and S. Tangirala, 1997, "A nonlinear stochastic model of fatigue crack dynamics", Probabilistic Engineering Mechanics, 12, (1), pp. 33-40
  • J. N. Rozak and Asok Ray, 1997, "Robust multivariable control of rotorcraft in forward flight", Journal of the American Helicopter Society, 42, (2), pp. 149-160
  • M. Holmes, S. Tangirala and Asok Ray, 1997, "Life-extending control of reusable rocket engines", AIAA Journal of Guidance, Control, and Dynamics, 20, (3), pp. 621-623
  • P. Kallappa, M. Holmes and Asok Ray, 1997, "Life-extending control of fossil fuel power plants for structural durability and high performance", Automatica, 33, (6), pp. 1101-1118
  • N-C. Tsai and Asok Ray, 1997, "Stochastic optimal control under randomly varying delays", International Journal of Control, 68, (5), pp. 1179-1202
  • J. H. Shen, Asok Ray and S. H. Levine, 1996, "A decision support system for maintenance management of a boiling water reactor power plant", Nuclear Safety, 37, (1), pp. 1-11
  • H. E. Garcia and Asok Ray, 1996, "State-space supervisory control of reconfigurable discrete event systems", International Journal of Control, 63, (4), pp. 767-797
  • M. Holmes, Asok Ray and D. Mudgett, 1996, "Modeling of the planar motion of a proposed laboratory flexible structure", AIAA Journal of Guidance, Control, and Dynamics, 19, (3), pp. 710-713
  • C-K. Weng, Asok Ray and X. Dai, 1996, "Modelling of power plant dynamics and uncertainties for robust control synthesis", Applied Mathematical Modelling, 20, (7), pp. 501-512
  • Asok Ray and S. Tangirala, 1996, "Stochastic modeling of fatigue crack dynamics for on-line damage estimation and life prediction", IEEE Transactions on Control Systems Technology, 4, (4), pp. 443-451
  • X. Dai and Asok Ray, 1996, "Damage-mitigating control of a reusable rocket engine: Part I—Life prediction of the main thrust chamber wall", ASME Journal of Dynamic Systems, Measurement, and Control, 118, (3), pp. 401-408
  • X. Dai and Asok Ray, 1996, "Damage-mitigating control of a reusable rocket engine: Part II—Formulation of an optimal policy and simulation", ASME Journal of Dynamic Systems, Measurement, and Control, 118, (3), pp. 409-415
  • S. Lee and Asok Ray, 1995, "Performance management of manufacturing system networks", International Journal of Flexible Manufacturing, 7, (1), pp. 47-71
  • M-K. Wu and Asok Ray, 1995, "Damage-mitigating control of mechanical systems for structural durability and high performance", ASME Journal of Engineering for Gas Turbines and Power, 117, (2), pp. 307-313
  • H. E. Garcia, Asok Ray and R. M. Edwards, 1995, "Implementation of a reconfigurable fault-tolerant hybrid supervisory system", IEEE Transactions on Control Systems Technology, 3, (2), pp. 157-170
  • C-J. Li and Asok Ray, 1995, "Neural network representation of fatigue damage dynamics", SMART Materials and Structures, 4, (2), pp. 126-133
  • S. Tangirala, Asok Ray and M. Carpino, 1995, "Damage-mitigating control of mechanical structures: Experimental verification of the concept", SMART Materials and Structures, 4, (2), pp. 139-146
  • E. Yaz and Asok Ray, 1995, "Grammian assignment for stochastic parameter systems and their stabilization under randomly varying delays", Optimal Control Applications and Methods, 16, (4), pp. 263-272
  • X. Dai and Asok Ray, 1995, "Life prediction of the thrust chamber wall of a reusable rocket engine", AIAA Journal of Propulsion and Power, 11, (6), pp. 1279-1287
  • Asok Ray and M-K. Wu, 1994, "Fatigue damage control of mechanical systems", SMART Materials and Structures, 3, (1), pp. 47-58
  • Asok Ray, X. Dai, M-K. Wu, M. Carpino and C. F. Lorenzo, 1994, "Damage-mitigating control of a reusable rocket engine", AIAA Journal of Propulsion and Power, 10, (2), pp. 225-234
  • R. Luck and Asok Ray, 1994, "A fixed memory filter for real-time estimation of noise-corrupted signals", AIAA Journal of Guidance, Control, and Dynamics, 17, (3), pp. 231-234
  • C-K. Weng, R. M. Edwards and Asok Ray, 1994, "Automation for efficient and safe large power changes in nuclear power plants", Transactions of the American Nuclear Society, 70, pp. 324-325
  • R. Luck and Asok Ray, 1994, "Experimental verification of a delay compensation algorithm for integrated communication and control systems", International Journal of Control, 59, (6), pp. 1357-1372
  • C-K. Weng, R. M. Edwards and Asok Ray, 1994, "Robust wide-range control of nuclear reactors using the feedforward-feedback concept", Nuclear Science and Engineering, 117, (3), pp. 177-185
  • Asok Ray, 1994, "Output feedback control under randomly varying distributed delays", AIAA Journal of Guidance, Control, and Dynamics, 17, (4), pp. 701-711
  • Asok Ray, M-K. Wu, M. Carpino and C. F. Lorenzo, 1994, "Damage-mitigating control of mechanical systems: Part I—Conceptual development and model formulation", ASME Journal of Dynamic Systems, Measurement, and Control, 116, (3), pp. 437-447
  • Asok Ray, M-K. Wu, M. Carpino and C. F. Lorenzo, 1994, "Damage-mitigating control of mechanical systems: Part II—Formulation of an optimal control policy and simulation", ASME Journal of Dynamic Systems, Measurement, and Control, 116, (3), pp. 448-455
  • C-K. Weng, R. M. Edwards and Asok Ray, 1994, "Feedforward-feedback control by nonlinear programming and structured singular value approach", Transactions of the American Nuclear Society, 71, pp. 365-366
  • J. H. Shen and Asok Ray, 1993, "Extended discrete-time LTR synthesis of delayed control systems", Automatica, 29, (2), pp. 431-438
  • Asok Ray, L-W. Liou and J. H. Shen, 1993, "State estimation using randomly delayed measurements", ASME Journal of Dynamic Systems, Measurement, and Control, 115, (1), pp. 19-26
  • A. Ayyagari and Asok Ray, 1993, "Modelling and analysis of a data communication protocol for integrated control of advanced aircraft", Computer Communications, 16, (6), pp. 350-365
  • S. Lee and Asok Ray, 1993, "Performance management of multi-access communication networks", IEEE Journal of Selected Areas in Communications, 11, (9), pp. 1426-1437
  • Asok Ray, K. M. Edwards and K. Y. Lee, 1992, "Robust optimal control of nuclear reactors and power plants", Nuclear Technology, 98, (2), pp. 137-148
  • J. H. Shen, L-W. Liou, S. Levine, Asok Ray and M. Detamore, 1992, "Expert system for maintenance management of a boiling water reactor power plant", Transactions of the American Nuclear Society, 65, pp. 380-381
  • J. H. Shen and Asok Ray, 1992, "Discrete-time loop transfer recovery with multistep delays", Optimal Control Applications and Methods, 13, (3), pp. 255-263
  • A. Ayyagari and Asok Ray, 1992, "A fiber optic network protocol for computer integrated manufacturing", ASME Journal of Engineering for Industry, 114, (3), pp. 345-351
  • R. M. Edwards, J. A. Turso, K. Y. Lee, H. E. Garcia and Asok Ray, 1992, "The Penn State intelligent distributed control research laboratory", IEEE Transactions on Energy Conversion, 7, pp. 478-482
  • R. Luck, Asok Ray and Y. Halevi, 1992, "Observability under recurrent loss of outputs", AIAA Journal of Guidance, Control, and Dynamics, 15, (1), pp. 284-287
  • A. Ayyagari and Asok Ray, 1992, "A fiber-optic-based protocol for manufacturing system networks: Part I—Conceptual development and architecture", ASME Journal of Dynamic Systems, Measurement, and Control, 114, (1), pp. 113-120
  • A. Ayyagari and Asok Ray, 1992, "A fiber-optic-based protocol for manufacturing system networks: Part II—Statistical analysis", ASME Journal of Dynamic Systems, Measurement, and Control, 114, (1), pp. 121-131
  • R. Yu, J. J. Metzner and Asok Ray, 1991, "Twin-bus-control (TBC) protocol for fiber-optic-based networks", Computer Communications, 14, (10), pp. 598-607
  • H. E. Garcia, Asok Ray and R. M. Edwards, 1991, "Reconfigurable control of power plants using learning automata", IEEE Control Systems Magazine, 11, (1), pp. 85-92
  • R. Luck and Asok Ray, 1991, "Failure detection and isolation of ultrasonic ranging sensors for robotic applications", IEEE Transactions on Systems, Man, and Cybernetics, 21, (1), pp. 221-227
  • Asok Ray and R. Luck, 1991, "Signal validation in multiply-redundant systems", IEEE Control Systems Magazine, 11, (2), pp. 44-49
  • R. M. Edwards, K. Y. Lee and Asok Ray, 1991, "Multilayer robust control for safety enhancement of reactor operations", Transactions of the American Nuclear Society, 63, pp. 402-403
  • S. Nann, Asok Ray and S. Kumara, 1991, "An automated decision support system for control of real-time processes", International Journal of Intelligent Systems, 6, pp. 739-758
  • L-W. Liou and Asok Ray, 1991, "A stochastic regulator for integrated communication and control systems: Part I—Formulation of control law", ASME Journal of Dynamic Systems, Measurement, and Control, 113, (4), pp. 604-611
  • L-W. Liou and Asok Ray, 1991, "A stochastic regulator for integrated communication and control systems: Part II—Numerical analysis and simulation", ASME Journal of Dynamic Systems, Measurement, and Control, 113, (4), pp. 612-619
  • L-W. Liou and Asok Ray, 1990, "Integrated communication and control systems: Part III—Non-identical sensor and controller sampling", ASME Journal of Dynamic Systems, Measurement, and Control, 112, (3), pp. 357-364
  • S. H. Hong and Asok Ray, 1990, "Analysis and simulation of the priority scheme in token bus protocols", Computer Communications, 113, (3), pp. 157-164
  • R. M. Edwards and Asok Ray, 1990, "Concept of a computer network architecture for complete automation of nuclear power plants", Transactions of the American Nuclear Society, 61
  • Y. Halevi and Asok Ray, 1990, "Analysis of integrated communication and control system networks", ASME Journal of Dynamic Systems, Measurement, and Control, 113, (3), pp. 365-371
  • R. Luck and Asok Ray, 1990, "An observer-based compensator for distributed delays", Automatica, 26, (5), pp. 903-908
  • Asok Ray, 1990, "Multi-level hypotheses testing for signal validation in continuous-time processes", ASME Journal of Dynamic Systems, Measurement, and Control, 112, (4), pp. 787-790
  • L-W. Liou and Asok Ray, 1990, "On modeling of integrated communication and control systems", ASME Journal of Dynamic Systems, Measurement, and Control, 112, (4), pp. 790-794
  • Asok Ray, 1989, "Introduction to networking for integrated control systems", IEEE Control Systems Magazine, 9, (1), pp. 76-79
  • Asok Ray and S. Phoha, 1989, "Research directions in computer networking for manufacturing systems", ASME Journal of Engineering for Industry, 111, (2), pp. 109-115
  • Asok Ray, 1989, "Sequential testing for fault detection in multiply-redundant systems", ASME Journal of Dynamic Systems, Measurement, and Control, 111, (2), pp. 329-332
  • R. M. Edwards, Asok Ray, M. A. Schultz and E. S. Kenney, 1989, "A concept of integrated control for nuclear power plants", Transactions of the American Nuclear Society, 59, pp. 290-291
  • A. N. Vavreck, N. Nayak, E. D. Bushway and Asok Ray, 1989, "An adaptive seam tracker for welding heavy-section aluminum", IEEE Transactions on Industry Applications, 25, (4), pp. 658-663
  • Asok Ray, S. H. Hong, S. Lee and P. Egbelu, 1988, "Discrete-event continuous-time simulation of distributed digital control systems", Transactions of the Society for Computer Simulation, 5, (1), pp. 71-85
  • D. R. Thompson, Asok Ray and S. R. T. Kumara, 1988, "A hierarchically structured knowledge-based system for welding automation and control", ASME Journal of Engineering for Industry, 110, (1), pp. 71-76
  • Asok Ray, 1988, "Distributed data communication networks for real-time process control", Chemical Engineering Communications, 65, pp. 139-154
  • Asok Ray and S. Phoha, 1988, "A service access procedure (SAP) for a transport layer protocol", Telematics and Informatics, 5, (1), pp. 65-73
  • Asok Ray, 1988, "Networking for computer-integrated manufacturing", IEEE Network Magazine, 2, (3), pp. 40-47
  • Asok Ray and M. Desai, 1988, "Fault detection using a linear algebraic approach", Linear Algebra in Signals, Systems, and Control, pp. 627-641
  • Asok Ray, 1988, "Network access protocols for real-time distributed control systems", IEEE Transactions on Industry Applications, 24, (5), pp. 897-904
  • H. P. Polenta, Asok Ray and J. A. Bernard, 1988, "Microcomputer-based fault detection using redundant sensors", IEEE Transactions on Industry Applications, 24, (5), pp. 905-912
  • Y. Halevi and Asok Ray, 1988, "Integrated communication and control systems: Part I—Analysis", ASME Journal of Dynamic Systems, Measurement, and Control, 110, (4), pp. 367-373
  • Asok Ray and Y. Halevi, 1988, "Integrated communication and control systems: Part II—Design considerations", ASME Journal of Dynamic Systems, Measurement, and Control, 110, (4), pp. 374-381
  • A. Abo-Ismail and Asok Ray, 1987, "Effect of nonlinearities on the transient response of an electrohydraulic position control servo", Journal of Fluid Control, 17, (3), pp. 59-79
  • N. Nayak, Asok Ray and A. N. Vavreck, 1987, "An adaptive real-time intelligent seam tracking system", SME Journal of Manufacturing Systems, 6, (3), pp. 241-245
  • Asok Ray, 1987, "Performance analysis of medium access control protocols for distributed digital avionics", ASME Journal of Dynamic Systems, Measurement, and Control, 109, (4), pp. 370-377
  • Asok Ray and M. Desai, 1986, "A redundancy management procedure for fault detection and isolation", ASME Journal of Dynamic Systems, Measurement, and Control, 108, (3), pp. 248-254
  • J. A. Bernard, D. D. Lanning and Asok Ray, 1985, "Use of reactivity constraints for automatic control of reactor power", IEEE Transactions on Nuclear Science, NS-32, (1), pp. 1036-1040
  • D. D. Lanning, J. A. Bernard, J. H. Hopps and Asok Ray, 1985, "MITR-II: Integrated fault-tolerant systems—Implementation and experiments", Transactions of the American Nuclear Society, 49, pp. 377-378
  • J. A. Bernard, D. D. Lanning and Asok Ray, 1985, "The nuclear industry and digital control: An unrealized opportunity", Instrumentation Technology, 32, (9), pp. 61-64
  • Asok Ray, 1985, "A microcomputer-based fault-tolerant control system for industrial applications", IEEE Transactions on Industry Applications, IA-21, (5), pp. 1276-1283
  • J. A. Bernard, Asok Ray and D. D. Lanning, 1984, "Digital computer control of power transients in a nuclear reactor", IEEE Transactions on Nuclear Science, NS-31, (1), pp. 701-705
  • Asok Ray and M. Desai, 1984, "A calibration and estimation filter for multiply redundant measurement systems", ASME Journal of Dynamic Systems, Measurement, and Control, 106, (2), pp. 149-156
  • Asok Ray, M. Desai and J. J. Deyst, 1983, "Fault detection and isolation in a nuclear reactor", AIAA Journal of Energy, 7, (1), pp. 79-85
  • Asok Ray, J. A. Bernard and D. D. Lanning, 1983, "Computer control of power in a nuclear reactor", IEEE Transactions on Nuclear Science, NS-30, (1), pp. 820-824
  • J. C. Deckert, J. L. Fisher, D. B. Laning and Asok Ray, 1983, "Signal validation for nuclear power plants", ASME Journal of Dynamic Systems, Measurement, and Control, 105, (1), pp. 24-29
  • Asok Ray, M. Desai and J. J. Deyst, 1983, "On-line fault diagnosis in a nuclear reactor by sequential testing", IEEE Transactions on Nuclear Science, NS-30, (3), pp. 1850-1855
  • Asok Ray, R. Geiger, M. Desai and J. Deyst, 1983, "Analytic redundancy for on-line fault diagnosis in a nuclear reactor", AIAA Journal of Energy, 7, (4), pp. 367-373
  • J. Fisher, Asok Ray, R. Ornedo, E. Kujawski and S. M. Divakaruni, 1983, "Signal validation for a BWR suppression pool", Transactions of the American Nuclear Society, 44, pp. 50-52
  • J. A. Bernard, Asok Ray and D. D. Lanning, 1983, "Digital computer control of a nuclear reactor", Transactions of the American Nuclear Society, 44, pp. 64-66
  • J. A. Bernard, D. D. Lanning, K. Kwok and Asok Ray, 1983, "Demonstration of decision analysis techniques for steady-state reactor control", Transactions of the American Nuclear Society, 45, pp. 661-662
  • Asok Ray, 1981, "Updating the control systems of a Trallfa industrial robot", Industrial Robot: An International Journal, 8, (3), pp. 166-170
  • Asok Ray, 1981, "Nonlinear dynamic model of a solar steam generator", Solar Energy, 26, (4), pp. 297-306
  • Asok Ray, D. A. Berkowitz and V. H. Sumaria, 1980, "Nonlinear dynamic model of a fluidized bed steam generation system", ASME Journal of Engineering for Power, 102, (1), pp. 202-208
  • Asok Ray, 1980, "Dynamic modelling of power plant turbines for controller design", Applied Mathematical Modeling, 4, pp. 109-112
  • Asok Ray, 1980, "Automated Finishing of Steel Castings", Industrial Robot: An International Journal, 7, (3), pp. 172-174
  • Asok Ray, 1980, "Dynamic modelling of once-through steam generator for solar applications", Applied Mathematical Modeling, 4, pp. 417-423
  • Asok Ray, 1979, "Modeling of an HTGR steam power plant", Applied Mathematical Modeling, 3, pp. 391-394
  • Asok Ray and D. A. Berkowitz, 1979, "Design of a practical controller for a commercial scale fossil power plant", ASME Journal of Dynamic Systems, Measurement, and Control, 101, (4), pp. 284-289
  • Y. Lin, R. S. Nielsen and Asok Ray, 1978, "Fuel controller design in a once-through subcritical steam generator", ASME Journal of Engineering for Power, 100, (1), pp. 189-196
  • Asok Ray, 1978, "On the application of modern control to power plants: Comment on "Articles on Power Plant Control" by R.A. Smoak", ASME Journal of Dynamic Systems, Measurement and Control, 100, (1), pp. 94
  • Asok Ray, 1978, "Identification of an industrial process by numerical inversion of the Laplace transform", IEEE Transactions on Industry Applications, IA-14, (2), pp. 111-115
  • Asok Ray and H. F. Bowman, 1978, "Digital simulation of a high temperature gas-cooled reactor (HTGR) steam power plant", IEEE Transactions on Nuclear Science, NS-25, (4), pp. 1068-1077
  • Asok Ray, D. A. Berkowitz and V. H. Sumaria, 1978, "Modeling and simulation of a multicell fluidized bed steam generator", AIAA Journal of Energy, 2, (5), pp. 269-278
  • Asok Ray, 1978, "Dynamic modeling and simulation of a relief valve", Simulation, 31, (5), pp. 167-172
  • Asok Ray and H. F. Bowman, 1976, "A nonlinear dynamic model of a once-through steam generator", ASME Journal of Dynamic Systems, Measurement, and Control, 98, (3), pp. 322-329
  • Susheel Dharmadhikari, R Riddhiman, Asok Ray and Amrita Basak, , "A Mixed Deep Neural Network for Micron-Scale Fatigue Damage Detection in Polycrystalline Aluminum Alloy", Metals: An MDPI Journal

Conference Proceedings

  • Hassan Alqahtani and Asok Ray, 2022, "Artificial Neural Network for Automatic Prediction of the Machining Type via Classification of the Surface Texture", Proceedings of the ASME 2022 International Mechanical Engineering Congress and Exposition IMECE2022
  • Hassan Alqahtani and Asok Ray, 2022, "Detection of Fatigue Damage via Neural Network Analysis of Surface Topography Measurements", SEMC 2022: Eighth International Conference on Structural Engineering, Mechanics and Computation
  • Asok Ray, S. Sarkar, K. G. Lore, V. Ramanan, S. R. Chakravarthy and S. Phoha, 2015, "Early detection of combustion instability from hi-speed flame images via deep learning and symbolic time series analysis", 2015 Annual Conference of the Prognostics and Health Management Society, Coronado, CA
  • Asok Ray, D. K. Jha and M. Zhu, 2015, "Game theoretic controller synthesis for multi-robot motion planning-Part II: Policy-based algorithms", 5th IFAC Workshop (NecSys’15), Philadelphia, PA, USA
  • Asok Ray, S. Sarkar, P. Chattopadhyay, S. Phoha and M. Levi, 2015, "Alphabet size selection for symbolization of dynamic data-driven systems: An information-theoretic approach", American Control Conference, Chicago, IL, USA
  • Asok Ray, Y. Li, P. Chattopadhyay and C D. Rahn, 2015, "Identification of battery parameters via symbolic input-output analysis: A dynamic data-driven approach", American Control Conference, Chicago, IL, USA
  • Asok Ray, Y. Li, D. K. Jha and T. A. Wettergren, 2015, "Feature level sensor fusion for target detection in dynamic environments", American Control Conference, Chicago, IL, USA
  • Asok Ray, D. K. Jha, A. Srivastav and K. Mukherjee, 2015, "Depth estimation in Markov models of time-series data via spectral analysis", American Control Conference, Chicago, IL, USA
  • Asok Ray, P. Chattopadhyay, D. K. Jha and S. Sarkar, 2015, "Path planning in GPS-denied environments: A collective intelligence approach", American Control Conference, Chicago, IL, USA
  • Asok Ray, S. Sarkar and T. Damarla, 2015, "Real-time activity recognition from seismic signature via multi-scale symbolic time series analysis (MSTSA)", American Control Conference, Chicago, IL, USA
  • Asok Ray, N. Nirani, J.-W. Lee and S. Phoha, 2015, "Learning context-aware measurement models", American Control Conference, Chicago, IL, USA
  • Asok Ray, S. Sarkar, D. K. Jha and S. Phoha, 2015, "Dynamic data-driven symbolic causal modeling for battery performance & health monitoring", FUSION 2015, Washington, D. C., USA
  • Asok Ray, 2015, "Kernel task-driven dictionary learning for hyperspectral image classification", IEEE International Conference on Acoustics, Speech and Signal Process (ICASSP), Brisbane, Australia, Australia, pp. 19 - 24
  • Asok Ray, M. Alamaniotis and X. Jin, 2015, "On-line condition monitoring of boiling water reactors: A symbolic dynamic data-driven approach", Proceedings of the 9th International Topical Meeting on Nuclear Plant Instrumentation,, Control, and Human Machine Interface Technologies (NPIC&HMIT 2015), Charlotte, NC, USA
  • S. Sonti, E. Keller, J. Horn and Asok Ray, 2013, "Identification of instabilities in rotorcraft systems", Sixth ASME Dynamic Systems and Control Conference (DSCC)
  • D. K. Jha, T. A. Wettergren and Asok Ray, 2013, "Adaptive optimal trade-off in undersea networks", Sixth ASME Dynamic Systems and Control Conference (DSCC)
  • X. Jin and Asok Ray, 2013, "Coverage control of autonomous vehicles for oil spill cleaning in dynamic and uncertain environments", American Control Conference
  • S. Sarkar, N. Virani, M. Yasar, Asok Ray and S. Sarkar, 2013, "Spatiotemporal information fusion for fault detection in shipboard auxiliary systems", American Control Conference
  • S. Das, S. Sarkar, Asok Ray, A. Srivastava and D. L. Simon, 2013, "Anomaly detection in flight recorder data: A dynamic data-driven approach", American Control Conference
  • S. Sonti, N. Virani, D. K. Jha, K. Mukherjee and Asok Ray, 2013, "Language measure-theoretic path planning in the presence of dynamic obstacles", American Control Conference
  • Y. Wen, K. Mukherjee and Asok Ray, 2012, "Adaptation in symbolic dynamic systems for pattern classification", American Control Conference
  • D. S. Singh, S. Sarkar, S. Gupta and Asok Ray, 2012, "Optimal partitioning of ultrasonic data for fatigue damage detection", American Control Conference
  • Y. Wen, K. Mukherjee and Asok Ray, 2012, "Adaptation in symbolic dynamic systems for pattern classification", American Control Conference
  • Y. Wen, S. Sarkar, Asok Ray, X. Jin and T. Damarla, 2012, "A unified framework for supervised learning of semantic models", American Control Conference
  • X. Jin, S. Gupta, J. M. Luff and Asok Ray, 2012, "Multi-resolution navigation of mobile robots with complete coverage of unknown and complex environments", American Control Conference
  • S. Sarkar, K. Mukherjee and Asok Ray, 2012, "Distributed decision propagation in mobile agent networks", American Control Conference
  • K. Mukherjee, S. Sarkar and Asok Ray, 2012, "Symbolic transient time-series analysis for fault detection in aircraft gas turbine engines", American Control Conference
  • P. Adenis and Asok Ray, 2011, "A vector space on irreducible and synchronizable probabilistic finite state automata", International Federation of Automatic Control Conference
  • X. Jin, S. Gupta, Asok Ray and T. Damarla, 2011, "Multimodal sensor fusion for personnel detection using unattended ground sensors", Fusion 2011
  • Y. Wen, I. Chattopadhyay, Asok Ray and S. Phoha, 2011, "Modeling of symbolic systems: Part I-Vector space formulation of probabilistic finite state automata", American Control Conference
  • M. Yasar, S. Chakraborty, E. Keller, G. Bajpal and Asok Ray, 2011, "Symbolic encoding of analytic signals for structural analysis of power systems", American Control Conference
  • A. Srivastav, Y. Wen, E. Hendrick, I. Chattopadhyay, Asok Ray and S. Phoha, 2011, "Information fusion for object & situation assessment in sensor networks", American Control Conference
  • P. Adenis, K. Mukherjee and Asok Ray, 2011, "State splitting and state merging in probabilistic finite state automata", American Control Conference
  • X. Jin, Asok Ray, S. Gupta and T. Damarla, 2011, "Symbolic dynamic filtering of seismic sensors for target detection in identification", American Control Conference
  • I. Chattopadhyay, Y. Wen, Asok Ray and S. Phoha, 2011, "Unsupervised inductive learning in symbolic sequences via recursive identification of self-similar semantics", American Control Conference
  • I. Chattopadhyay and Asok Ray, 2011, "Globally optimal routing via distributed decision theoretic self-organization", American Control Conference
  • S. Sarkar, D. S. Singh, A. Srivastav and Asok Ray, 2011, "Semantic sensor fusion for fault diagnosis in aircraft gas turbine engines", American Control Conference
  • Y. Wen, Asok Ray, I. Chattopadhyay and S. Phoha, 2011, "Modeling of symbolic systems: Part II-Hilbert space formulation of symbolic systems for model identification and order reduction", American Control Conference
  • S. Sarkar, K. Mukherjee, A. Srivastav and Asok Ray, 2010, "Distributed decision propagation in mobile agent networks", IEEE Conference on Decision and Control (CDC)
  • X. Jin, K. Mukherjee, S. Gupta and Asok Ray, 2010, "Wavelet-based feature extraction for behavior recognition in mobile robots", ASME Dynamic Systems and Control Conference
  • S. Sarkar, K. Mukherjee, X. Jin and Asok Ray, 2010, "Optimization of time series data partitioning for parameter identification", ASME Dynamic Systems and Control Conference
  • X. Jin, J. M. Luff, S. Gupta and Asok Ray, 2010, "Autonomous vehicle navigation with dynamic application and complete coverage of unknown environments", ASME Dynamic Systems and Control Conference
  • K. Mukherjee, S. Gupta, Asok Ray and T. Wettergren, 2010, "Statistical mechanics-inspired optimization for sensor field reconfiguration", American Control Conference
  • S. Sarkar, K. Mukherjee, A. Srivastav and Asok Ray, 2010, "Critical phenomena and finite-size scaling in communication networks", American Control Conference
  • M. Yasar, Asok Ray and H. Kwatny, 2010, "Minimum rotation partitioning for data analysis and its application to fault detection", American Control Conference
  • S. Chakraborty, E. Keller and Asok Ray, 2010, "Symbolic identification of dynamical systems: Theory and experimental validation", American Control Conference
  • S. Chakraborty, S. Sarkar, Asok Ray and Shashi Phoha, 2010, "Symbolic identification for anomaly detection in aircraft gas turbine engines", American Control Conference
  • X. Jin, S. Gupta, K. Mukherjee and Asok Ray, 2010, "Symbolic dynamics of wavelet images for pattern identification", American Control Conference
  • I. Chattopadhyay, Y. Wen and Asok Ray, 2010, "Pattern classification in symbolic streams via semantic annihilation of information", American Control Conference
  • I. Chattopadhyay, Y. Wen, S. Phoha and Asok Ray, 2010, "Mathematical foundations of sensor network design based on linguistic informatics", American Control Conference
  • I. Chattopadhyay, S. Mohinta and Asok Ray, 2010, "A decision-theoretic model of selection modulated intra-host antigenic variation for multi-strain pathogens", American Control Conference
  • X. Jin, S. Sarkar, K. Mukherjee and Asok Ray, 2009, "Suboptimal partitioning of time-series data for anomaly detection", IEEE Conference on Decision and Control (CDC)
  • K. Mukherjee, Asok Ray, T. A. Wettergren, I. Chattopadhyay and S. Phoha, 2009, "Signal threshold estimation in a sensor field for undersea target tracking", American Control Conference
  • S. Sarkar, K. Mukherjee and Asok Ray, 2009, "Symbolic analysis of time series signals using generalized Hilbert transform", American Control Conference
  • S. Sarkar, C. Rao and Asok Ray, 2009, "Estimation of multiple faults in aircraft gas-turbine engines", American Control Conference
  • S. Sarkar, K. Mukherjee, A. Srivastav and Asok Ray, 2009, "Understanding phase transition in communication networks to enable robust and resilient control", American Control Conference
  • A. Srivastav and Asok Ray, 2009, "Adaptive control of sensor networks for detection of percolating faults", American Control Conference
  • D. Singh, A. Srivastav, S. Gupta, E. Keller and Asok Ray, 2009, "Ultrasonic measurement of crack opening load for life-extending control of mechanical structures", American Control Conference
  • C. Rao, K. Mukherjee, S. Gupta, Asok Ray and S. Phoha, 2009, "Symbolic pattern analysis of sidescan sonar images for underwater mine detection", American Control Conference
  • G. Mallapragada and Asok Ray, 2009, "Behavior recognition in mobile robots using symbolic dynamic filtering and language measure", American Control Conference
  • S. Chakraborty, C. Rao, E. Keller, Asok Ray and M. Yasar, 2009, "Data-driven estimation of multiple fault parameters in permanent magnet synchronous motors", American Control Conference
  • I. Chattopadhyay and Asok Ray, 2009, "Generalization of v* path planning for accommodation of amortized dynamic uncertainties in plan execution", American Control Conference
  • I. Chattopadhyay and Asok Ray, 2009, "Optimal path-planning under finite memory obstacle dynamics based on probabilistic finite state automata models", American Control Conference
  • I. Chattopadhyay and Asok Ray, 2009, "Supervised self-organization of large homogeneous swarms using ergodic projections of Markov chains", American Control Conference
  • W. Lu, I. Chattopadhyay, G. Mallapragada and Asok Ray, 2009, "A real time implementable all-pair dynamic planning algorithm for robot navigation based on the renormalized measure of probabilistic regular languages", American Control Conference
  • G. Mallapragada, Y. Wen, S. Phoha, Asok Ray and D. Bein, 2009, "Tracking mobile targets using sensor networks", 17th Mediterranean Conference on Control & Automation
  • X. Jin, R. M. Edwards and Asok Ray, 2009, "Integrated robust and resilient control for nuclear power plants", Sixth American Nuclear Society International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies NPIC&HMIT 2009

Encyclopedia Entries

  • P. Kallappa and Asok Ray, 1999, "Life-extending load regulation of power plants",, Encyclopedia of electrical and electronics engineering, 11, 494-511, Wiley, New York

Manuscripts

  • Asok Ray, D. K. Jha, T. A. Wettergren and K. Mukherjee, 2015, "Topology optimization for energy management in underwater sensor networks", International Journal of Control
  • Asok Ray, S. Bahrampour, N. Nasrabadi and K. Jenkins, 2015, "Multimodal task-driven dictionary learning for image classification", IEEE Transactions on Image Processing
  • Asok Ray, D. K. Jha, P. Chattopadhyay and S. Sarkar, 2015, "Path planning in GPS-denied environments via collective intelligence of distributed sensor network", International Journal of Control
  • Asok Ray, Y. Li, D. K. Jha and T. A. Wettergren, 2015, "Information fusion of passive sensors for detection of moving targets in dynamic environments"
  • X. Jin and Asok Ray, 2013, "Navigation of autonomous vehicles for oil spill cleaning in dynamic and uncertain environments", International Journal of Control
  • G. Mallapragada and Asok Ray, , "Symbolic dynamic filtering and language measure for pattern classification in mobile robots", Auomatica
  • B. Smith, P. Chattopadhyay, Asok Ray, S. Phoha and T. Damarla, , "Performance robustness of feature extraction for target detection & classification"
  • K. Jerath, Asok Ray, S. Brennan and V. Gayah, , "Statistical mechanics-inspired framework for studying the effects of mixed traffic flows on highway congestion"
  • S. Sarkar, Asok Ray, A. Mukhopadhyay, R. Chaudhari and S. Sen, , "Early detection of lean blow out (LBO) via D-Markov machine construction"
  • Y. Li, Asok Ray and T. A. Wettergren, , "Target detection and target type & motion classification: Comparison of feature extraction algorithms"
  • S. Sonti, E. Keller, J. Horn and Asok Ray, , "Stability monitoring of rotorcraft systems: A dynamic data-driven approach", ASME Journal of Dynamic Systems, Measurement and Control, 136, pp. 24505-1 - 24505-6

Other

  • Asok Ray, S. Bahrampour, N. M. Nasrabadi, S. Pal and A. Pal, 2015, "Sparse representation for time-series classification"
  • S. Gupta, D. Singh, A. Srivastav and Asok Ray, 2009, "Measurement of behavioral uncertainties in mechanical vibration systems: A symbolic dynamics approach", pp. Ch. 5, 1-29
  • S. Gupta and Asok Ray, 2009, "Real-time fatigue damage monitoring via in situ ultrasonic sensing", pp. Ch. 1, 3-48
  • V. Yang, B.-S. Hong and Asok Ray, 2001, "Robust feedback control of combustion instabilities with model uncertainty", pp. Ch. 22, 361-380
  • H. E. Watson and Asok Ray, 1987, "Laser-based intelligent robotic systems for manufacturing automation"
  • Asok Ray, 1978, "Power plant transients in a feedpump system", 2

Research Projects

Honors and Awards

Service

Service to Penn State:

Service to External Organizations: