Jie Han

Area of Study / Keywords

Computer Engineering Integrated Circuits and Systems Engineering Department Executive

About

Jie Han received his BSc degree in electronic engineering from Tsinghua University in 1999, and his PhD degree from Delft University of Technology in 2004. He was a NASA INAC (Institute for Nanoelectronics and Computing) Postdoctoral Fellow in the Department of Electrical and Computer Engineering at the University of Florida from 2004 to 2007. From 2007 to 2009, he worked as a Research Scientist at the Advanced Medical Diagnostics SA/BV in Belgium.

Dr. Han was named in the “Milestones of Science” for 2003 by the 125th anniversary issue of Science (July 1, 2005, Vol. 309, No. 5731), for developing theory of fault-tolerant nanocircuits. He was nominated for the 2006 Christiaan Huygens Price of Science by the Royal Dutch Academy of Science (Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) Christiaan Huygens Wetenschapsprijs). He is a member of the Institute of Electrical and Electronics Engineers (IEEE), the Association for Computing Machinery (ACM), and the American Society for Engineering Education (ASEE).

Research

Research interests

With the scaling of CMOS and emergence of other nanotechnologies, the random and statistical properties of devices start to challenge the traditional paradigm of deterministic computation. Circuits and systems built from nanoscale devices will have to deal with the inherent randomness and stochastic behaviour of the devices. To address these challenges, my research focuses on the design and modeling of probabilistic, energy-efficient and fault-tolerant circuits and systems based on nanoscale devices. It includes:

• Developing models and tools that account for the variability and statistical properties of scaled CMOS and emerging nanotechnologies
• Developing probabilistic/stochastic approaches that trade off accuracy for energy and explore the optimization of reliability, power and area of nanoscale circuits and systems
• Devising probabilistic yet robust computational paradigms that leverage the statistical and stochastic characteristics of nanodevices.
• I'm also interested in the computational modeling of biological systems including molecular, cellular, and genetic networks.

Current Research

My current research focuses on the reliability, testing and modeling of probabilistic/stochastic networks in both nanoelectronic and biological applications. This includes:

• Developing accurate and efficient approaches to reliability modeling of both combinational and sequential circuits
• Investigating variability and reliability issues in CMOS and molecular devices with the aim at developing useful models for simulations at the logic circuit level
• Developing and implementing probabilistic testing methodologies using stochastic computational models
• Investigating the advantages and limitations of a general stochastic computing system that consists of probabilistic and unreliable components
• Devising effective and efficient approaches to modeling biological networks such as those in cell signalling pathways and genetic circuits

ECE 412 - Fault-Tolerant Computing

Defects in manufacturing, failure mechanisms, and fault modeling. Reliability and availability theory. Static and dynamic redundancy and repair. Error correcting codes and self-checking systems. Roll-back strategies. Fault-tolerant computers and network architecture. Prerequisite: ECE 342. Credit may be obtained in only one of CMPE 425 or ECE 412.

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