J34 [IEEE TVLSI] Independent and Dynamic Vector Symbolic Architecture for Hardware-Efficient Edge AI [PDF]
Mehran Moghadam, Abu Masum, Sercan Aygun, and M. Hassan Najafi
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2026
J33 [IEEE TCAD] A Novel Grid-Based, Reconfigurable Strong PUF Architecture Integrated with MRAM, Resilient to Learning-Based Inference
Amir Bahador, Mohammad Hossein Moaiyeri, Mohammad Javad Adel, and M. Hassan Najafi
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2026
J32 [IEEE TCASAI] A Robust DRAM/MRAM In-Memory Computing Architecture with Analog MVM and Intrinsic Authentication for Edge AI
Seyed Mahdi Memarian, Amir Bahador, Mohammad Hossein Moaiyeri, and M. Hassan Najafi
IEEE Transactions on Circuits and Systems for Artificial Intelligence, 2025
J31 [IEEE TVLSI] ECO: Enhanced In-Stream Correlation Manipulation for Low-Discrepancy Stochastic Computing
Sina Asadi, Amir H. Jalilvand, M. Hassan Najafi, and Magdy Bayoumi
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2025
J30 [ACM TDAES] Sorting it out in Hardware: A State-of-the-Art Survey
Amir Jalilvand, Faeze S. Banitaba, S. Newsha Estiri, Sercan Aygun, M. Hassan Najafi
ACM Transactions on Design Automation of Electronic Systems, 2025
J29 [IEEE TGRS] Regional Weather Variable Predictions by Machine Learning with Near-Surface Observational and Atmospheric Numerical Data
Yihe Zhang, Bryce Turney, Purushottam Sigdel, Xu Yuan, Eric Rappin, Adrian L. Lago, Sytske Kimball,
Li Chen, Paul Darby, Lu Peng, Sercan Aygun, Yazhou Tu, M. Hassan Najafi, Nian-Feng Tzeng
IEEE Transactions on Geoscience and Remote Sensing, 2025
J28 [IEEE ESL] Adversarial Attack Bypass by Stochastic Computing [PDF]
Faeze S. Banitaba, Sercan Aygun, Mehran Shoushtari Moghadam, Amirhossein Jalilvand, Bingzhe Li, M. Hassan Najafi
IEEE Embedded System Letters, 2025
J27 [IEEE TCAD] Sobol Sequence Optimization for Hardware-Efficient Vector Symbolic Architectures [PDF]
Sercan Aygun and M. Hassan Najafi
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2024
J26 [IEEE TNANO] Low-Cost and Highly-Efficient Bit-stream Generator for Stochastic Computing Division [PDF]
Mehran Shoushtari Moghadam, Sercan Aygun, Sina Asadi, M. Hassan Najafi
IEEE Transactions on Nanotechnology, 2024
J25 [IEEE ESL] Detecting Vulnerability in Hardware Description Languages: Opcode Language Processing [PDF]
A. Ayar, A. Sahruri, S. Aygun, M. S. Moghadam, M. Hassan Najafi, M. Margala
IEEE Embedded System Letters, 2023
J24 [IEEE TQE] Machine Learning-Based Qubit Allocation for Error Reduction in Quantum Circuits [PDF]
Travis LeCompte, Fang Qi, Xy Yuan, Nian-Feng Tzeng, M. Hassan Najafi, and Lu Peng
IEEE Transactions on Quantum Engineering, August 2023
J23 [IEEE ESL] No-Multiplication Deterministic Hyperdimensional Encoding for Resource-Constrained Devices [PDF]
Mehran Shoushtari Moghadam, Sercan Aygun and M. Hassan Najafi
IEEE Embedded System Letters, Sep 2023
J22 [IEEE ESL] Hardware-Software Co-optimization of Long-Latency Stochastic Computing [PDF]
Sercan Aygun, Lida Kouhalvandi, M. Hassan Najafi, Serdar Ozoguz and Ece Olcay Gunes
IEEE Embedded System Letters, Sep 2023
J21 [IEEE TCAD] A Generalized Residue Number System Design Approach for Ultra-Low Power Arithmetic Circuits Based on Deterministic Bit-streams [PDF]
Kamyar Givaki, Ahmad Khonsari, M. H. Gholamrezaei, Saeid Gorgin and M. Hassan Najafi
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, March 2023
J20 [IEEE JETCAS] Stochastic Computing Design and Implementation of a Sound Source Localization System [PDF] [GitHub]
Peter Schober, Seyedeh Newsha Estiri,, Sercan Aygun, Amir Hossein Jalilvand, M. Hassan Najafi, and Nima TaheriNejad
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, March 2023
Selected among the 2023 JETCAS Spotlight Articles
J19 [IEEE TCAD] Agile Simulation of Stochastic Computing Image Processing with Contingency Tables [PDF] [GitHub]
Sercan Aygun, M. Hassan Najafi, Mohsen Imani, and Ece Olcay Gunes
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2023
J18 [Front. Neurosci'22] EventHD: Robust and Efficient Hyperdimensional Learning with Neuromorphic Sensor [PDF]
Zhuowen Zou, Haleh Alimohamadi, Yeseong Kim, M. Hassan Najafi, Tony Givargis, Narayan Srinivasa and Mohsen Imani
Frontiers in Neuroscience, Feb 2022
J17 [Scientific Report] Memory-Inspired Spiking Hyperdimensional Network for Robust Online Learning [PDF]
Mohsen Imani, Zhuowen Zou, Haleh Alimohamadi, Ali Zakeri, Farhad Imani, Yeseong Kim, and M. Hassan Najafi
Scientific Reports, May 2022
J16 [TCASII'22] Stochastic Computing in Beyond Von-Neumann Era: Processing Bit-Streams in Memristive Memory [PDF]
Mohsen Riahi Alam, M. Hassan Najafi, Nima TaheriNejad, Mohsen Imani, Raju Gottumukkala
IEEE Transactions on Circuits and Systems II, March 2022
J15 [JETC'22] Sorting in Memristive Memory [PDF]
Mohsen Riahi Alam, M. Hassan Najafi and Nima TaheriNejad
ACM Journal on Emerging Technologies in Computing Systems, Feb 2022
J14 [Front. Neurosci'22] GrapHD: Graph-Based Hyperdimensional Memorization for Brain-Like Cognitive Learning [PDF]
Prathyush Poduval, Haleh Alimohamadi, Ali Zakeri, Farhad Imani, M. Hassan Najafi, Tony Givargis, and Mohsen Imani
Frontiers in Neuroscience, Feb 2022
J13 [TC'21] High-Accuracy Multiply-Accumulate (MAC) Technique for Unary Stochastic Computing [PDF]
Peter Schober, M. Hassan Najafi and Nima TaheriNejad
IEEE Transaction on Computers, June 2021
J12 [D&T'21] Exact Stochastic Computing Multiplication in Memristive Memory [PDF]
Mohsen Riahi Alam, M. Hassan Najafi and Nima TaheriNejad
IEEE Design and Test, Dec 2021
J11 [D&T'21] High Performance Deterministic Stochastic Computing Using Residue Number System [PDF]
K. Givaki, R. Hojabr, M. H. Gholamrezaei, A. Khonsari, S. Gorgin, D. Rahmati, and M. Hassan Najafi
IEEE Design and Test, Dec 2021
J10 [TVLSI'19] Performing Stochastic Computation Deterministically [PDF]
M. Hassan Najafi, D. Jenson, M. Riedel and D. J. Lilja
in IEEE Transaction on Very Large Scale Integration (VLSI) Systems, Dec 2019.
J9 [JETC'19] Low-Cost Stochastic Hybrid Multiplier for Quantized Neural Networks [PDF]
B. Li, M. Hassan Najafi, D. J. Lilja
in ACM Journal on Emerging Technologies in Computing Systems, June 2019.
J8 [TVLSI'18] Low Cost Sorting Network Circuits using Unary Processing [PDF]
M. Hassan Najafi, D. J. Lilja, M. Riedel and K. Bazargan
in IEEE Transaction on Very Large Scale Integration (VLSI) Systems, April 2018.
J7 [CAL'18] On Memory System Design for Stochastic Computing [PDF]
S. Karen Khatamifard, M. Hassan Najafi, Ali Ghoreyshi, Ulya Karpuzcu, David J. Lilja
in IEEE Computer Architecture Letters, July 2018
J6 [TETC'18] High Quality Down-Sampling For Deterministic Approaches to Stochastic Computing [PDF]
M. Hassan Najafi and David J. Lilja
in IEEE Transactions on Emerging Topics in Computing, Jan 2018
J5 [MICRO'17] An Overview of Time-based Computing with Stochastic Constructs [PDF]
M. Hassan Najafi, S Jamali-Zavareh, D. J. Lilja, M. Riedel, K. Bazargan, and R. Harjani
in IEEE Micro, Nov 2017
J4 [TC17] Polysynchronous Clocking: Exploiting the Skew Tolerance of Stochastic Circuits [PDF] [YouTube: EN, ZH, ES]
M. Hassan Najafi, D. J. Lilja, M. Riedel, and K. Bazargan
in IEEE Transaction on Computers, Oct 2017
Selected as IEEE Transaction on Computers' Feature Paper of the Month, Oct 2017
J3 [JETC17] A Reconfigurable Architecture with Sequential Logic-based Stochastic Computing [PDF]
M. Hassan Najafi, P. Li, D. J. Lilja, W. Qian, K. Bazargan, M. Riedel
in ACM Journal on Emerging Technologies in Computing Systems, June 2017.
J2 [TVLSI17] Time-Encoded Values for Highly Efficient Stochastic Circuits [PDF]
M. Hassan Najafi, S Jamali-Zavareh, D. J. Lilja, M. Riedel, K. Bazargan, and R. Harjani
in IEEE Transaction on Very Large Scale Integration (VLSI) Systems, May 2017.
J1 [TVLSI16] A Fast Fault-Tolerant Architecture for Sauvola Local Image Thresholding Algorithm Using SC [PDF]
M. Hassan Najafi and M. E. Salehi
in IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Feb. 2016.
C79 [DCAS'26] Real-Time Hyperdimensional Computing for Lightweight Language Model Classifiers
Alaaddin Goktug Ayar, Sercan Aygun, M. Hassan Najafi, and Martin Margala
The 19th IEEE Dallas Circuits and Systems conference (DCAS), April 2026
C78 [DATE'26] DAIQUIRI: Dynamic Quantization with Layer-wise Sensitivity Ranking for Hardware-Efficient LLMs [PDF]
Tanha Tasfia, Abu Masum, Mehran Moghadam, M. Hassan Najafi and Sercan Aygun
The 2026 Design, Automation, and Test in Europe (DATE), April 2026
C77 [DATE'26] ADC-FIST: ADC-Free In/Near-Sensor Stochastic Object Tracking [PDF]
Mehran Moghadam, Sepehr Tabrizchi, Ali Shafiee Sarvestani, Sercan Aygun, Arman Roohi and M. Hassan Najafi
The 2026 Design, Automation, and Test in Europe (DATE), April 2026
C76 [ICCD'25] GAN–BiLSTM–HDC: A Hybrid Framework for Robust and Hardware-Efficient Malware Detection
Emilien Meyer, Abu Masum, Mehran Moghadam, Lida Kouhalvandi, Gourav Datta, Sercan Aygun and M. Hassan Najafi
The 43rd IEEE International Conference on Computer Design (ICCD), November 2025
C75 [BioCAS'25] HyperFuzzy: Fuzzy-Driven Adaptive Hyperdimensional Learning for Highly Efficient and Accurate Multi-Type Seizure Classification
Seyedeh Newsha Estiri, Magdy Bayoumi, Hisham Daoud, M. Hassan Najafi
2025 IEEE Biomedical Circuits and Systems (BioCAS), October 2025
C74 [BioCAS'25] UnaryEdge: Time-Domain In-Sensor Neural Processing for Smart Healthcare
Chengwei Zhou, Mehran Moghadam, Sercan Aygun, M. Hassan Najafi, Gourav Datta
2025 IEEE Biomedical Circuits and Systems (BioCAS), October 2025
C73 [QCE'25] Quantum-Based Random Numbers: Entropy, Efficiency, and Practicality
Abu Masum, Mehran Moghadam, Lida Kouhalvandi, M. Hassan Najafi, Arman Roohi, and Sercan Aygun
2025 IEEE International Conference on Quantum (QCE), IEEE Quantum Week 2025, Aug 2025
C72 [MWSCAS'25] tiny Machine Learning on Android Devices: Continuous Health Monitoring with Wearables
Colin Dupuis, Abu K. M. Masum, M. Hassan Najafi, Ulkuhan Guler and Sercan Aygun
IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), Aug. 2025
C71 [ISLPED'25] Always-On Sensing in Energy-Harvested Systems via Stochastic Intermittent Computing
Sepehr Tabrizchi, Mehran Moghadam, Ali Shafiee Sarvestani, Sercan Aygun, and M. Hassan Najafi, and Arman Roohi
International Symposium on Low Power Electronics and Design (ISLPED), Aug. 2025
C70 [ISLPED'25] ID-VSA: Independent and Dynamic Vector Symbolic Architecture for Energy-Efficient Edge AI
Mehran Moghadam, Abu Kaisar Mohammad Masum, Sercan Aygun, and M. Hassan Najafi
International Symposium on Low Power Electronics and Design (ISLPED), Aug. 2025
C69 [GLSVLSI'25] Quantum Image Processing: A Comparative Study of NEQR and FRQI Encoding Schemes with Hybrid Processing
Abu Masum, Mehran Moghadam, Lida Kouhalvandi, M. Hassan Najafi, Sercan Aygun
The 35th Great Lakes Symposium on VLSI (GLSVLSI), June 2025
C68 [GLSVLSI'25] Robust Data Processing for Vector Symbolic Computing
Mehran Moghadam, Abu Masum, Sercan Aygun, M. Hassan Najafi
The 35th Great Lakes Symposium on VLSI (GLSVLSI), June 2025
C67 [SMACD'25] Power Amplifier Modeling along with Hyperparameter Optimization of LSTM-based DNN through Multi-Verse Optimizer
Lida Kouhalvandi, Sercan Aygun, Serdar Ozoguz, Ladislau Matekovits, M. Hassan Najafi, and Saeid Karamzadeh
International Conf. on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD'25), July 2025
C66 [FCCM'25] Breaking New Ground: Division Directly in Memory [PDF]
Farzad Razi, Mehran Shoushtari Moghadam, M. Hassan Najafi, Sercan Aygun, Marc Riedel
The 33rd IEEE International Symposium on Field-Programmable Custom Computing Machines (FCCM), Fayetteville, Arkansas, May 2025.
C65 [DAC'25] Late Breaking Results: Automated Topology Generation for Power Amplifier Designs through BiLSTM-based DNN and Multi-objective Optimizations [PDF]
Lida Kouhalvandi, Sercan Aygun, M. Hassan Najafi and Arman Roohi
The 62nd Design Automation Conference (DAC), San Francisco, CA, June 2025.
C64 [DAC'25] Late Breaking Results: On-the-Fly Hadamard Hypervector Processing for Efficient Hyperdimensional Computing [PDF]
Abu Masum, Mehran Moghadam, Sabrina Hassan Moon, Ahmed Mamdouh, M. Hassan Najafi, Dayane Reis and Sercan Aygun
The 62nd Design Automation Conference (DAC), San Francisco, CA, June 2025.
C63 [DAC'25] Late Breaking Results: In-Memory Arithmetic: Enabling Division with Stochastic Logic [PDF]
Farzad Razi, Mehran Shoushtari Moghadam, M. Hassan Najafi, Sercan Aygun and Marc Riedel
The 62nd Design Automation Conference (DAC), San Francisco, CA, June 2025.
C62 [DAC'25] All-in-memory Stochastic Computing using ReRAM [PDF]
Joao Paulo Cardoso De Lima, Mehran Shoushtari Moghadam, Sercan Aygun, Jeronimo Castrillon, M. Hassan Najafi, and Asif Ali Khan
The 62nd Design Automation Conference (DAC), San Francisco, CA, June 2025.
C61 [DAC'25] Comparison-Free Bit-Stream Generation for Cost-Efficient Unary Computing [PDF]
Faeze S. Banitaba, Amir Hossein Jalilvand, M. Hassan Najafi, and Sercan Aygun
The 62nd Design Automation Conference (DAC), San Francisco, CA, June 2025.
C60 [ISCAS'25] TRUE-BSG: A True Random Bit-Stream Generator for Fast and Efficient Stochastic Computing [PDF]
M. Shoushtari Moghadam, S. A Williams, A. K. Mohammad Masum, M. Hassan Najafi, S. Aygun, and M. Bayoumi
The 2025 IEEE International Symposium on Circuits and Systems (ISCAS), May 2025.
C59 [ISCAS'25] AMS-HD: Acute Mountain Sickness Detection with Hyperdimensional Computing [PDF]
Abu K. M. Masum, R. Pradhananga, J. I Schmidt, M. Shoushtari Moghadam, M. Hassan Najafi, B. Unluturk, U. Guler, and S. Aygun
The 2025 IEEE International Symposium on Circuits and Systems (ISCAS), May 2025.
C58 [BioCAS'24] Efficient Epileptic Seizure Type Classification Using Hyperdimensional Computing [PDF]
Seyedeh Newsha Estiri, Hisham Daoud, M. Hassan Najafi, and Magdy Bayoumi
2024 IEEE Biomedical Circuits and Systems (BioCAS), Oct 2024.
C57 [ISLPED'24] All You Need is Unary: End-to-End Bit-Stream Processing in Hyperdimensional Computing [PDF]
M. Shoushtari Moghadam, Sercan Aygun, Faeze Sadat Banitaba, and M. Hassan Najafi
The 29th ACM/IEEE International Symposium on Low Power Electronics and Design (ISLPED), Aug 2024.
C56 [GLSVLSI'24] Word2HyperVec: From Word Embeddings to Hypervectors for Hyperdimensional Computing [PDF]
Alaaddin Goktug Ayar, Sercan Aygun, M. Hassan Najafi and Martin Margala
The 34th Great Lakes Symposium on VLSI (GLSVLSI), Tampa Bay Area, FL, June 2024.
C55 [DAC'24] TriSC: Low-Cost Design of Trigonometric Functions with Quasi Stochastic Computing [PDF]
Sercan Aygun, Mehran Shoushtari Moghadam and M. Hassan Najafi
The 61st Design Automation Conference (DAC), San Francisco, CA, June 2024.
C54 [AP-S/URSI'24] Radiation Pattern Extrapolation through Generative Adversarial Network [PDF]
Lida Kouhalvandi, Sercan Aygun, Ladislau Matekovits, and M. Hassan Najafi
2024 IEEE International Symposium on Antennas and Propagation, July 2024.
C53 [NICE'24] Brain-Inspired Hypervector Processing at the Edge of Large Language Models [PDF]
Alaaddin Goktug Ayar, Sercan Aygun, M. Hassan Najafi, Martin Margala
The 2024 Neuro-Inspired Computational Elements (NICE), San Diego, CA, April 2024.
C52 [DATE'24] uHD: Unary Processing for Lightweight and Dynamic Hyperdimensional Computing [PDF]
Sercan Aygun, Mehran Shoushtari Moghadam and M. Hassan Najafi
The 2024 Design, Automation, and Test in Europe (DATE), Valencia, Spain, March 2024
C51 [ASP-DAC'24] P2LSG: Powers-of-2 Low-Discrepancy Sequence Generator for Stochastic Computing [PDF]
Mehran Shoushtari Moghadam, Sercan Aygun, Mohsen Riahi Alam and M. Hassan Najafi
The 29th Asia and South Pacific Design Automation Conference (ASP-DAC), South Korea, Jan 2024
C50 [NANOARCH'23] Multiplexer Optimization for Adders in Stochastic Computing [PDF]
Sercan Aygun, M. Hassan Najafi, Lida Kouhalvandi, Ece Olcay Gunes
The 18th ACM International Symp. on Nanoscale Architectures (NANOARCH), Dresden, Germany, Dec 2023
C49 [NANOARCH'23] Accurate and Energy-Efficient Stochastic Computing with Van Der Corput Sequences [PDF]
Mehran Shoushtari Moghadam, Sercan Aygun, Mohsen Riahi Alam, Jonas Schmidt, M. Hassan Najafi, Nima Taherinejad
The 18th ACM International Symp. on Nanoscale Architectures (NANOARCH), Dresden, Germany, Dec 2023
C48 [CASES'23] No-Multiplication Deterministic Hyperdimensional Encoding for Resource-Constrained Devices [PDF]
Mehran Shoushtari Moghadam, Sercan Aygun and M. Hassan Najafi
The 2023 International Conference on Compilers, Architectures, and Synthesis for Embedded Systems (CASES), Hamburg, Germany, Sep 2023
C47 [CODES+ISSS'23] Hardware-Software Co-optimization of Long-Latency Stochastic Computing [PDF]
Sercan Aygun, Lida Kouhalvandi, M. Hassan Najafi, Serdar Ozoguz and Ece Olcay Gunes
The 2023 International Conference on Hardware/Software Codesign and System Synthesis (CODES+ISSS), Hamburg, Germany, Sep 2023
C46 [GLSVLSI'23] Reconvergent Path-aware Simulation of Bit-stream Processing [PDF] [1Min Video]
Sercan Aygün, M. Hassan Najafi, Mohsen Imani, Ece O. Gunes
The 33rd Great Lakes Symposium on VLSI (GLSVLSI), Knoxville, TN, June 2023
C45 [GLSVLSI'23] Graph Neural Network Assisted Quantum Compilation for Qubit Allocation [PDF]
Travis LeCompte, Fang Qi, Xu Yuan, Nian-Feng Tzeng, M. Hassan Najafi, Lu Peng
The 33rd Great Lakes Symposium on VLSI (GLSVLSI), Knoxville, TN, June 2023
C44 [GLSVLSI'23] Stochastic Computing for Reliable Memristive In-Memory Computation [PDF]
Mohsen Riahi Alam, M. Hassan Najafi, Nima Taherinejad, Mohsen Imani, Lu Peng
The 33rd Great Lakes Symposium on VLSI (GLSVLSI), Knoxville, TN, June 2023
C43 [GLSVLSI'23] Bit-Stream Processing with No Bit-Stream: Efficient Software Simulation of Stochastic Vision Machines [PDF] [1Min Video]
Sercan Aygun, M. Hassan Najafi, Mohsen Imani, Ece Olcay Gunes
The 33rd Great Lakes Symposium on VLSI (GLSVLSI), Knoxville, TN, June 2023
Best Paper Award
C42 [DATE'23] A Linear-Time, Optimization-Free, and Edge Device-Compatible Hypervector Encoding [PDF] [GitHub]
Sercan Aygun, M. Hassan Najafi and Mohsen Imani
The 2023 Design, Automation, and Test in Europe (DATE), Antwerp, Belgium, April 2023
C41 [ISQED23] Scalable Low-Cost Sorting Network with Weighted Bit-Streams [PDF]
Brady Prince, M. Hassan Najafi, Bingzhe Li
The 24th International Symposium on Quality Electronic Design (ISQED), San Francisco, CA, April 2023
C40 [IGSC22] A Low-Cost Stochastic Computing-based Fuzzy Filtering for Image Noise Reduction [PDF]
Seyedeh Newsha Estiri, Amir Hossein Jalilvand, Samaneh Naderi, M. Hassan Najafi, Mahdi Fazeli
The 13 International Green and Sustainable Computing Conference (IGSC), Oct 2022
C39 [ICCD22] Full Stack Parallel Online Hyperdimensional Regression on FPGA [PDF]
Hanning Chen, M. Hassan Najafi, Elaheh Sadredini, and Mohsen Imani
The 40th IEEE International Conference on Computer Design (ICCD), Oct 2022
C38 [ICCAD22] Sound Source Localization using Stochastic Computing [Demo Video] [PDF]
Peter Schober, Seyedeh Newsha Estiri, Sercan Aygun, Nima TaheriNejad and M. Hassan Najafi
The 41st IEEE/ACM International Conference on Computer-Aided Design (ICCAD), Nov 2022 (AR: 22.5%)
C37 [DAC22] A Fast and Low-Cost Comparison-Free Sorting Engine with Unary Computing [PDF]
Amir Hossein Jalilvand, Seyedeh Newsha Estiri, Samaneh Naderi, M. Hassan Najafi and Mohsen Imani
The 2022 59th ACM/IEEE Design Automation Conference (DAC), July 2022
C36 [GOMACTECH22] Hyperdimensional Stochastic Representation for Robust Computation with Noisy Emerging Technologies
Mohsen Imani, M. Hassan Najafi, and Farhad Imani
GOMATECH, Miami, Florida, March 2022
C35 [ISCAS22] Stochastic Computing In Beyond Von-Neumann Era: Processing Bit-Streams In Memristive Memory [PDF]
Mohsen Riahi Alam, M. Hassan Najafi, Nima TaheriNejad, and Raju Gottumukkala
The 2022 IEEE International Symposium of Circuits and Systems (ISCAS), May 2022
C34 [NANOARCH21] Robust In-Memory Computing with Hyperdimensional Stochastic Representation [PDF]
Prathyush Poduval, Mariam Issa, Farhad Imani, Cheng Zhuo, Xunzhao Yin, M. Hassan Najafi, and Mohsen Imani
2021 IEEE/ACM Symposium on Nanoscale Architectures (NANOARCH 2021)
C33 [ICCAD21] CORLD: In-Stream Correlation Manipulation for Low-Discrepancy Stochastic Computing [GitHub] [PDF]
Sina Asadi, M. Hassan Najafi and Mohsen Imani
The 40th IEEE/ACM International Conference on Computer-Aided Design (ICCAD), Nov 2021 (AR: 23.5%)
C32 [DAC21] StocHD: Stochastic Hyperdimensional System for Efficient and Robust Learning from raw data [PDF]
Prathyush Poduval, Zhuowen Zou, M. Hassan Najafi, Houman Homayoun, Mohsen Imani
The 2021 58th ACM/IEEE Design Automation Conference (DAC), Dec 2021 (AR: 23%)
C31 [DATE21] A Low-Cost FSM-based Bit-Stream Generator for Low-Discrepancy Stochastic Computing [PDF]
Sina Asadi, M. Hassan Najafi and Mohsen Imani
The 2021 Design, Automation, and Test in Europe (DATE), Virtual, Feb 2021 (acceptance rate 24%)
C30 [DATE21] ManiHD: Efficient Hyper-Dimensional Learning Using Manifold Trainable Encoder [PDF]
Z. Zou, Y. Kim, M. Hassan Najafi and Mohsen Imani
The 2021 Design, Automation, and Test in Europe (DATE), Virtual, Feb 2021 (acceptance rate 24%)
C29 [GLSVLSI20] Accelerating Deterministic Stochastic Computing with Context-Aware Bit-stream Generator [PDF]
Sina Asadi and M. Hassan Najafi
The 30th ACM Great Lakes Symposium on VLSI (GLSVLSI), Virtual, Sep 2020
C28 [DAC20] LDFSM: A Low-Cost Bit-Stream Generator for Low-Discrepancy Stochastic Computing [PDF]
Sina Asadi and M. Hassan Najafi
The 2020 57th ACM/IEEE Design Automation Conference (DAC), Virtual, July 2020
C27 [ISCAS20] Performing Stochastic Computation Deterministically [PDF]
M. Hassan Najafi, D. Jenson, M. Riedel and D. J. Lilja
The 2020 IEEE International Symposium of Circuits and Systems (ISCAS), Virtual, Oct 2020
C26 [ISCAS20] TaxoNN: a Light-Weight Accelerator for Deep Neural Network Training [PDF]
R. Hojabr, K. Givaki, K. Pourahmadi, P. Nooralinejad, A. Khonsari, D. Rahmati, M. Hassan Najafi
The 2020 IEEE International Symposium of Circuits and Systems (ISCAS), Virtual, Oct 2020
C25 [ISCAS20] Exact In-Memory Multiplication Based on Deterministic Stochastic Computing [PDF]
Mohsen Riahi Alam, M. Hassan Najafi and Nima TaheriNejad
The 2020 IEEE International Symposium of Circuits and Systems (ISCAS), Virtual, Oct 2020
C24 [ISCAS20] Fuzzy-Logic Using Unary Bit-Stream Processing [PDF]
Amir Hossein Jalilvand, M. Hassan Najafi and Mahdi Fazeli
The 2020 IEEE International Symposium of Circuits and Systems (ISCAS), Virtual, Oct 2020
C23 [ISCAS20] Energy-Efficient Pulse-Based Convolution for Near-Sensor Processing [PDF]
M. Hassan Najafi, S. Rasoul Faraji, K. Bazargan and David J. Lilja
The 2020 IEEE International Symposium of Circuits and Systems (ISCAS), Virtual, Oct 2020
C22 [DATE20] SCRIMP: A General Stochastic Computing Architecture using ReRAM in-Memory Processing [PDF]
S. Gupta, M. Imani, J. Sim, A. Huang, F. Wu, M. Hassan Najafi and T. Rosing
The 2020 Design, Automation, and Test in Europe (DATE), Virtual, April 2020
C21 [ASAP19] Context-Aware Number Generator for Deterministic Bit-stream Computing [PDF]
Sina Asadi and M. Hassan Najafi
2019 IEEE 30th Intern. Conf. on Application-specific Systems, Architectures and Processors (ASAP), New York, NY, July 2019
C19 [ASAP19] Energy-Efficient Near- Sensor Convolution using Pulsed Unary Processing [PDF]
M. Hassan Najafi, S. Rasoul Faraji, K. Bazargan and D. J. Lilja
2019 IEEE 30th Intern. Conf. on Application-specific Systems, Architectures and Processors (ASAP), New York, NY, July 2019
C18 [GLSVLSI19] Low Cost Hybrid Spin-CMOS Compressor for Stochastic Neural Networks [PDF]
Bingzhe Li, Jiaxi Hu, M.Hassan Najafi, Steven Koester, and David Lilja
The 29th ACM Great Lakes Symposium on VLSI (GLSVLSI), Washington, D.C., May 2019 (AR: 29%)
C17 [DAC19] SkippyNN: An Embedded Stochastic-Computing Accelerator for Convolutional Neural Networks [PDF]
Reza Hojabr, Kamyar Givaki, SM Reza Tayaranian, Parsa Esfahanian, Ahmad Khonsari, Dara Rahmati, and M. Hassan Najafi
The 56th Design Automation Conference (DAC), Las Vegas, NV, June, 2019 (AR: 24.8%)
C16 [ISQED19] Accelerating Deterministic Bit-Stream Computing with Resolution Splitting [PDF]
*M. Hassan Najafi, *S. Rasoul Faraji, Bingzhe Li, David J. Lilja, and Kia Bazargan
(*The first two authors contributed equally)
The 20th International Symposium on Quality Electronic Design (ISQED), Santa Clara, CA, March 2019
C15 [DATE19] Energy-Efficient Convolutional Neural Networks with Deterministic Bit-Stream Processing [PDF]
*S. Rasoul Faraji, *M. Hassan Najafi, Bingzhe Li, Kia Bazargan, and David J. Lilja
(*The first two authors contributed equally)
The 2019 Design, Automation, and Test in Europe (DATE), Florence, Italy, March 2019 (AR: 24%)
C14 [ICCAD18] Deterministic Methods for Stochastic Computing using Low-Discrepancy Sequences [PDF]
M. Hassan Najafi, David J. Lilja, and Marc Riedel
The 37th IEEE/ACM International Conference on Computer-Aided Design (ICCAD), San Diego, CA, Nov 2018 (AR: 24.7%)
C13 [ISQED18] Quantized Neural Networks with New Stochastic Multipliers
Bingzhe Li, M. Hassan Najafi, Bo Yuan and David J. Lilja
The 19th International Symposium on Quality Electronic Design (ISQED), Santa Clara, CA, USA, Mar 2018
C12 [ICCD17] High Quality Down-Sampling For Deterministic Approaches to Stochastic Computing [PDF]
M. Hassan Najafi and David J. Lilja
The 35th IEEE International Conference on Computer Design (ICCD), Boston, MA, USA, Nov 2017 (AR: 29%)
Best Paper Award, [News], Selected as top ranked paper for publishing in IEEE TETC.
C11 [ICCD17] Power and Area Efficient Sorting Networks using Unary Processing [PDF]
M. Hassan Najafi, D. J. Lilja, M. Riedel, and K. Bazargan
The 35th IEEE International Conference on Computer Design (ICCD), Boston, MA, USA, Nov 2017.
C10 [ISCAS17] Time-Encoded Values for Highly Efficient Stochastic Circuits [PDF]
M. Hassan Najafi, S Jamali-Zavareh, D. J. Lilja, M. Riedel, K. Bazargan, and R. Harjani
The 50th IEEE International Symposium of Circuits and Systems (ISCAS), Baltimore, MD, USA, May 2017
C9 [DAC'17] StochMem: Towards Seamless Stochastic Computing Systems with Analog Memories
S. Karen Khatamifard, M. Hassan Najafi, Ali Ghoreyshi, Ulya Karpuzcu, David J. Lilja
in 54th Design Automation Conference (DAC) Work-In-Progress, Austin, TX, June 2017
C8 [ASP-DAC17] High-Speed Stochastic Circuits Using Synchronous Analog Pulses [PDF]
M. Hassan Najafi and David J. Lilja
2017 22nd Asia and South Pacific Design Automation Conference (ASP-DAC), Chiba, Japan, 2017 (AR: 31%)
C7 [ASP-DAC16] Polysynchronous stochastic circuits [PDF]
M. Hassan Najafi, D. J. Lilja, M. Riedel and K. Bazargan
2016 21st Asia and South Pacific Design Automation Conference (ASP-DAC), Macau, 2016 (AR: 34.3%)
C6 [DAC'16] Quantifying the Benefits of Stochastic Computation with Polysynchronous Clocking
M. Hassan Najafi, D. J. Lilja, M. Riedel, and K. Bazargan
2016 53rd Design Automation Conference (DAC) Work-In-Progress, Austin, TX, June 2016
C5 [FPGA16] Using SC to Reduce the Hardware Requirements for a Restricted Boltzmann Machine Classifier [PDF]
Bingzhe Li, M. Hassan Najafi, and David J. Lilja
2016 ACM/SIGDA International Symposium on Field-Programmable Gate Arrays (FPGA). ACM, New York, NY, USA
C4 [ICPADS15] GPU-Accelerated Nick Local Image Thresholding Algorithm [PDF] [Codes]
M. Hassan Najafi, A. Murali, D. J. Lilja and J. Sartori
2015 IEEE 21st International Conference on Parallel and Distributed Systems (ICPADS), Melbourne, VIC, 2015
C3 [ASAP15] An FPGA implementation of a Restricted Boltzmann Machine classifier using stochastic bit streams [PDF]
B. Li, M. Hassan Najafi and D. J. Lilja
2015 IEEE 26th International Conference on Application-specific Systems, Architectures and Processors (ASAP), Toronto, ON, 2015
C2 [ICEE15] Using Stochastic Architectures for Edge Detection Algorithms [PDF]
M. Ranjbar, M. Hassan Najafi, and M. E. Salehi
2015 23rd Iranian Conference on Electrical Engineering (ICEE), Jun 2015.
C1 [ICEE13] Exploring the design space for area-efficient embedded VLIW packet processing engine [PDF]
M. Hassan. Najafi and M. E. Salehi
2013 21rd Iranian Conference on Electrical Engineering (ICEE), Jun 2013
W10 [iMACAW22] A Low-Cost FSM-based Bit-Stream Generator for Low-Discrepancy Stochastic Computing
Mohsen Riahi Alam, M. Hassan Najafi and Nima TaheriNejad
The In-Memory Architectures and Computing Applications Workshop (iMACAW’22), Co-Located with DAC’22, July 2022
W9 [IWLS20] A Low-Cost FSM-based Bit-Stream Generator for Low-Discrepancy Stochastic Computing
Sina Asadi and M. Hassan Najafi
The 29th International Workshop on Logic & Synthesis (IWLS), July 2020
W8 [SCONA20] From Unary to Low-Discrepancy: Deterministic Bit-streams Revolutionize Stochastic Computing (invited)
M. Hassan Najafi
2020 Workshop on Stochastic Computing for Neuromorphic Architectures (SCONA), Virtual, April 2020.
W7 [CIMW20] Exact Stochastic Computing Multiplication in Memristive Memory
Mohsen Riahi Alam, M. Hassan Najafi and Nima TaheriNejad
2020 Computation-In-Memory: from Device to Applications Workshop (CIMW) (Co-located with DATE), Virtual, April 2020
W6 [WUC20] Context-Aware Bit-stream Generator for Deterministic Unary Processing
Sina Asadi and M. Hassan Najafi
First ISCA Workshop on Unary Computing (WUC), Phoenix, AZ, June 2019
W5 [WUC20] Fuzzy-logic Processing using Unary Bit-Streams (invited)
Amir Hosein Jalilvand, M. Hassan Najafi and Mahdi Fazeli
First ISCA Workshop on Unary Computing (WUC), Phoenix, AZ, June 2019
W4 [WUC20] Accelerating Unary Bit-Stream Processing Using Residue Numbers
K. Givaki, R. Hojabr, M. Hassan Najafi, A. Khonsari, S. Gorgin and Dara Rahmati
First ISCA Workshop on Unary Computing (WUC), Phoenix, AZ, June 2019
W3 [WUC20] Energy-Efficient Pulse-based Convolution Engine for Near-Sensor Processing (invited)
M. Hassan Najafi, David J. Lilja, and Marc Riedel
First ISCA Workshop on Unary Computing (WUC), Phoenix, AZ, June 2019
W2 [IWLS18] Fast-Converging, Scalable, Deterministic Bit-Stream Computing using Low-Discrepancy Sequences [Bib]
M. Hassan Najafi, David J. Lilja, and Marc Riedel
The 27th International Workshop on Logic & Synthesis (IWLS) (Co-located with DAC'18), San Francisco, CA, USA, Jun 2018
W1 [IWLS18] Using Resolution Splitting to Enhance Performance of Deterministic Bit-Stream Computing
*M. Hassan Najafi, *S. Rasoul Faraji, Bingzhe Li, David J. Lilja, and Kia Bazargan
(*The first two authors contributed equally)
The 27th International Workshop on Logic & Synthesis (IWLS) (Co-located with DAC'18), San Francisco, CA, USA, Jun 2018
Non-Provisional
P14. Architecture and Method for Binary and Unary In-Memory Sorting
Mohsen Riahi Alam, M. Hassan Najafi, and Nima TaheriNejad
Granted U.S. Patent Number: 12,045,166, Type: Non-Provisional, Date of Patent: July 23, 2024.
P13. TaxoNN: A Light-Weight Accelerator for Training Deep Neural Networks on the Edge
M. Hassan Najafi, R. Hojabr, Kamyar Givaki, K. Pourahmadi, P. Nooralinejad, A. Khonsari, and D. Rahmati
U.S. Patent Application, Type: Non-Provisional, Filing Date: October 7, 2022.
P12. Finite State Machine-Based Bit-Stream Generator for Low-Discrepancy Stochastic Computing
M. Hassan Najafi, Sina Asadi, and Mohsen Imani
U.S. Patent Application Number: 17/866,299, Type: Non-Provisional, Filing Date: July 15, 2022.
P11. Exact Stochastic Computing Multiplication in Memory
M. Hassan Najafi, Mohsen Riahi Alam, and Nima TaheriNejad
U.S. Patent Application Number: 17/723,793, Type: Non-Provisional, Filing Date: April 2022.
P10. Context-Aware Bit-Stream Generator for Deterministic Stochastic Computing
Sina Asadi and M. Hassan Najafi
U.S. Patent Application Number: 17/343,971, Type: Non-Provisional, Filing Date: June 10 2021.
P9. Method and Architecture for Fuzzy-Logic Using Unary Processing
M. Hassan Najafi, Amir Hossein Jalilvand, and Mahdi Fazeli
U.S. Patent Application Number: 17/340,834, Type: Non-Provisional, Filing Date: June 2021.
P8. Method for Pulse-Based Convolution for Near Sensor Processing
M. Hassan Najafi, S. Rasoul Faraji, K. Bazargan, and D. Lilja
Granted U.S. Patent Number: 12,299,556 B2, Type: Non-Provisional, Filing Date: May 27, 2021, Date of Patent: May 13, 2025.
P7. Embedded Stochastic-Computing Accelerator for Convolutional Neural Networks
M. Hassan Najafi, R. Hojabr, K. Givaki, S. Tayaranian, P. Esfahanian, A. Khonsari, and D. Rahmati
U.S. Patent Application Number: 17/159,347, Type: Non-Provisional, Filing Date: Feb 2021.
U.S. Patent Application Number: 62/969,854, Type: Provisional, Filing Date: Feb 2020.
P6. Methods and Architecture for Accelerating Deterministic Stochastic Computing using Residue Number System
M. Hassan Najafi, K. Givaki, R. Hojabr, A. Khonsari, M. Gholamrezayi, S. Gorgin, and D. Rahmati
U.S. Patent Application Number: 17/166,378, Type: Non-Provisional, Filing Date: Feb 2021.
P5. Low-discrepancy Deterministic Bit-stream Processing Using Sobol Sequences
M. Hassan Najafi, David J. Lilja, and Marc Riedel
Granted U.S. Patent Number: 11,275,563 B2, Type: Non-Provisional, Filing Date: June 2020, Date of Patent: March 15, 2022.
P4. Sorting Networks using Unary Processing [PDF]
M. Hassan Najafi, David J. Lilja, Marc Riedel, and Kia Bazargan
Granted U.S. Patent Number: 11,475,288, Type: Non-Provisional, Date of Patent: October 18, 2022.
P3. High-Quality Down-Sampling for Deterministic Bit-Stream Computing [PDF][Google Patents][UMN OTC]
M. Hassan Najafi and David J. Lilja
Granted U.S. Patent Number: 10,996,929 B2, Type: Non-Provisional, Date of Patent: May 04, 2021.
P2. Stochastic Computation using Pulse-Width Modulated Signals [PDF] [Google Patents] [USPTO]
M. Hassan Najafi, S Jamali-Zavareh, D. J. Lilja, M. Riedel, K. Bazargan, and R. Harjani
Granted U.S. Patent Number: 10,740,686 B2, Type: Non-Provisional, Date of Patent: Aug 11, 2020.
P1. Polysynchronous stochastic circuits [PDF] [Google Patents] [USPTO]
David J. Lilja, M. Hassan Najafi, Marc Riedel and Kia Bazargan
Granted U.S. Patent Number: 10,520,975 B2, Type: Non-Provisional, Date of Patent: Dec 31, 2019.
Provisional
P14. Method and Device for Sound Source Localization
M. Hassan Najafi, Peter Schober, Seyedeh Newsha Estiri, Sercan Aygun, Amir Hossein Jalilvand, Nima TaheriNejad
U.S. Patent Application Number: 63/530,694, Type: Provisional, Filing Date: Aug 04, 2023.
P13. Method for Improved Hypervector Encoding
Sercan Aygun, Mehran Shoushtari Moghadam, and M. Hassan Najafi
U.S. Patent Application Number: 63/530,034, Type: Provisional, Filing Date: July 31, 2023.
P12. Methods for Agile Stochastic Computing Image Processing
Sercan Aygun, M. Hassan Najafi, Ece Olcay Gunes
U.S. Patent Application Number: 63/525,603, Type: Provisional, Filing Date: July 7, 2023.
P11. Architecture and Methods for In-Memory Sorting
Mohsen Riahi Alam, M. Hassan Najafi, and Nima TaheriNejad
U.S. Patent Application, Type: Provisional, Filing Date: December 17, 2021.
P10. TaxoNN: A Light-Weight Accelerator for Training Deep Neural Networks on the Edge
M. Hassan Najafi, R. Hojabr, Kamyar Givaki, K. Pourahmadi, P. Nooralinejad, A. Khonsari, and D. Rahmati
U.S. Patent Application Number: 63/253,751, Type: Provisional, Filing Date: October 8, 2021.
P9. FSM-Based Bit-Stream Generator for Low-Discrepancy Stochastic Computing
M. Hassan Najafi, Sina Asadi, and Mohsen Imani
U.S. Patent Application Number: 63/222,589, Type: Provisional, Filing Date: July 16, 2021.
P8. Exact Stochastic Computing Multiplication in Memory
M. Hassan Najafi, Mohsen Riahi Alam, and Nima TaheriNejad
U.S. Patent Application, Type: Provisional, Filing Date: April 2021.
P7. Fuzzy Logic Utilizing Unary Bit-Stream Processing
M. Hassan Najafi, Amir Hossein Jalilvand, and Mahdi Fazeli
U.S. Patent Application Number: 63/036063, Type: Provisional, Filing Date: June 8, 2020.
P6. Context-Aware Bit-Stream Generator for Deterministic Stochastic Computing
Sina Asadi and M. Hassan Najafi
U.S. Patent Application, Type: Provisional, Filing Date: June 2020.
P5. Pulse-Based Convolution for Near-Sensor Processing
M. Hassan Najafi, S. Rasoul Faraji, K. Bazargan, and D. Lilja
U.S. Patent Application Number: 63/033,355, Type: Provisional, Filing Date: May 2020.
P4. Accelerating Deterministic Stochastic Computing using Residue Number System
M. Hassan Najafi, K. Givaki, R. Hojabr, A. Khonsari, M. Gholamrezayi, S. Gorgin, and D. Rahmati
U.S. Patent Application Number: 62/969,872, Type: Provisional, Filing Date: Feb 2020.
P3. Resolution Splitting for Bit-Stream Processing
M. Hassan Najafi, S. Rasoul Faraji, Bingzhe Li, David J. Lilja, and Kia Bazargan
U.S. Patent Application Number: 62/864,798, Type: Provisional, Filing Date: June 2019.
P2. Low-Cost Stochastic Hybrid Multiplier for Quantized Neural Networks
Bingzhe Li, M. Hassan Najafi, and David J. Lilja
U.S. Patent Application Number: 62/817,343, Type: Provisional, Filing Date: March 2019.
P1. Stochastic Computing with Analog Memory
Karen Khatamifard, M. Hassan Najafi, Ali Ghoreyshi, Ulya Karpuzcu, David J. Lilja
U.S. Patent Application Number: 62/735584, Type: Provisional, Filing Date: September 2018.
[PhD] M. Hassan Najafi, New Views for Stochastic Computing: From Time-Encoding to Deterministic Processing [PDF]
University of Minnesota-Twin Cities, USA, July 2018.
Accepted for DAC 2019 PhD Forum
Accepted for DATE 2019 PhD Forum
Accepted for ASP-DAC 2019 Student Research Forum
Selected to receive the 2018 EDAA Outstanding Dissertation Award in the area of "New Directions in Logic, Physical Design and CAD for Analog/Mixed-signal, Nano-Scale and Emerging Technologies" from the European Design and Automation Association (EDAA)
[Master] M. Hassan Najafi, Exploiting Stochastic Computing for Error Resilient Processors,
University of Tehran, Iran, June 2014.
[Bachelor] M. Hassan Najafi, Evaluation of image Thresholding algorithms,
University of Isfahan, Iran, 2011.