Research focus in the Bai group includes:
Solid mechanics and large deformation; Mechanical failures: damage, fracture, fatigue, and debonding; Stimuli-responsive actuation and instability; Soft active materials: hydrogels, liquid crystal elastomers, and biomaterials; Multi-physics of materials: mechanics, thermodynamics, chemistry, optics, and electromagnetism
Geographic resource allocation, logistics, scheduling, multimodal transport systems, shared mobility, decentralized systems and resilient networks, data visualization, computational social science; Data-driven robust optimization, computational geometry, geometric probability theory, and geospatial analysis.
Biomedical signal and image processing; medical imaging; statistical signal processing; inverse problems; electrocardiography; bio-optical imaging; magnetic resonance imaging; transcranial neuromodulation; estimation of protein conformations from Xray scattering; regularization; optimization
Nanomanufacturing; nano and microscale printing of sensors and electronics; nano and micro-scale defects in semiconductor manufacturing; high rate nanomanufacturing; power electronics, RF, NEMS devices and nanomaterials based nanoelectronics, flexible and hybrid electronics
Statistical and array signal processing; estimation and detection theory; Bayesian inference; stochastic filtering; robust statistics; and game theory, with applications to positioning systems (GNSS and indoor technologies); wireless communications, and mathematical biology
Optics, microscopy, coherent detection, interaction of light and sound
waves, hyperspectral imaging, diffusive optical tomography multi-model
imaging and remote sensing. Activities include computer modeling,
designing, building, and testing of hardware, and processing the
Environmental engineering and sustainability; life cycle assessment; energy efficiency and emissions modeling; environmental assessment of bio and nanomaterials; material and energy use in urban buildings and infrastructure
Innovations in translational medical imaging devices to better diagnose cancers, low-cost point-of-care diagnostic tools to delivery life-saving medicines to the resource-poor regions, and high performance computing tools to facilitate the development of the next-generation imaging methods
Systems reliability, accelerated life testing in reliability prediction; big data-data driven decision making in spatiotemporal streaming environment; life data (survival data) analysis; robust design of experiments
Health care resource allocation with multi-objective resource allocation models; modeling resiliency in complex systems; design and management of outpatient health care clinics; simulation: discrete event simulation and systems dynamics; deterministic and stochastic optimization
Green manufacturing; green supply chains; disassembly modeling; remanufacturing; reverse logistics; managing end of life products; environmentally conscious manufacturing; manufacturing sustainability; reverse and closed-loop supply chains; just-in-time (jit) manufacturing and materials management; operations research: stochastic and simulation modeling
Complex fluids, biomaterials & soft materials: manipulation of nanoscale and single-particle properties to control macroscale transport & assembly; microfluidics for biomedical, pharmaceutical & energy applications
Socio-technical systems, systems engineering and design, social and economic networks, resilience of networked systems, computational social sciences, platform-based systems, sharing economy systems, computational social sciences, game theory, artificial intelligence
Multiscale and multiphase flow and transport phenomena, surface tension interactions in micro/nanoengineered structures, and electrokinetic ion transport in porous media for applications in energy storage, portable biochemical diagnostics, thermal management, and water treatment systems
Coastal morphodynamics, including effects of extreme weather events on sediment transport in the surf zone; wave-current interactions in the nearshore; developing and implementing field-verified numerical models to study coastal processes, informing coastal management with process-based research
Entrepreneurship education microenvironments and their impact on the engagement of diverse populations, the influence of I-Corps on university ecosystems, and transforming BME education through instructional design
Economic-environmental assessment of alternative manu/nanomanufacturing routes towards sustainable design and manufacturing, societal implications of nanomanufacturing, with interdisciplinary collaborations in political science, philosophy, industrial hygiene and industrial engineering, development and assessment of educational games for engineering students and for K-12 outreach activities.
Biomechanics and Mechanobiology, Motor Control, Healthcare Systems, Human Factors Engineering, Industrial Engineering, Logistics and Operations Research, Business, Data Management and Statistics, Engineering Training and Education, Safety Management, Information Processing, Cognition/Cognitive Psychology, Human Performance Engineering, Biopharmaceutical Manufacturing, Process Control
Microstructure-macroscopic properties relationship in complex fluids; rheology and physics of complex and structured fluids; colloidal suspensions; mesoscale computational science; computational fluid dynamics; physics of living systems; hemorheology and hemodynamics
Synthesis of low dimensional nanomaterials and engineering their molecular structures; assembly, transfer and integration of nanomaterials and nanostructured architectures and study properties and underlying fundamental science; nanoelectronics, flexible devices, chemical sensors and energy application
Sensing, diagnostics and prognostics for manufacturing machines and equipment, AI for smart and sustainable manufacturing and manufacturing systems integration, Machine learning models for personalized medicine and healthcare, Computational methods for pain assessment physiological sensing systems, Engineering education, personalized learning, and mass-customized instruction model
Integrated circuit design and for nanoelectronics and nano technology, high speed system integration for signal processing and communication applications, bio-chip and bio-sensor interface circuit design, electronic neuron circuit design, low power adaptive robot controller circuit design; high performance and low power vlsI design, system-on-chip (soc), and Physical VLSI CAD
Single cell functional multi-omic analysis, Phenotypic drug profiling in droplet microfluidics for better targeting of drug-resistant tumors, Live single cell functional phenotyping and cell-cell communication in droplet nano-liter reactors
Experimental wireless networking and mobile computing, with a current focus on millimeter wave networking, high-bandwidth applications (VR, 360° video streaming) over wireless networks, LTE/WiFi coexistence, energy-aware protocol design for smartphones, and wireless sensing
Energy related and calorimeter studies related to pharmaceutical developments; simulation of thermal effects on laser beam propagation through heated materials; simulating microscale heat transfer phenomena and its effects on laser beam propagation; Simulation of laser welding processes
Building and site systems integration; structures and landscape performance; building and urban resilience; green infrastructure; socio-ecological factors in design, transdisciplinary teaching and learning
Power electronics, dc-dc converters, pulse width modulation, motion control, electric motor drives, analog circuits, control theory, differential equations, time delays, nonlinear systems and control, industrial control
Gasification and combustion of solid fuels, generation and containment of combustion-generated pollution, synthesis and characterization of combustion-generated materials, fire suppression – fire extinction, engine design and operation
Physical modeling of cancer progression, metastasis and interaction with the immune system. Most recent interests include the role of metabolic plasticity in these processes and the co-evolution of the tumor and the adaptive immune system. Other areas include spatial organization of the actin cytoskeleton, the mechanics of collective cell motility, and the analysis of genetic circuits involved in cell fate decisions.
Structure-property relationships in magnetofunctional materials for energy transformations including advanced permanent magnet materials and magnetocaloric materials; strategic materials and supply chains for technological application
Human-machine systems, human factors, biosensing and smart systems, human state and behavior modeling, transportation safety, healthcare and patient safety, human-friendly mechatronics, and human-robot interaction
Computational systems biology, an integration of mathematical modeling and bioinformatics for studying gene regulatory networks, single cell genomics, epithelial-mesenchymal transition, coarse-graining, reverse engineering, machine learning, stochasticity and heterogeneity in gene expression
Design and manipulation of molecular/materials chemistry and structure for new property discovery, new functionality and technology development by combining theoretical and experimental methods; high performance computing, quantum chemistry, statistical mechanics, polymer physics, materials and biomolecular engineering
Growth, reputation, and impact of the University's research portfolio including its strategic emphasis on Health, Security and Sustainability. Facilitating the success of Northeastern's faculty, staff and student researchers and scholars across ideation, articulation, execution and translation. Security, intelligence and resilience; corporate partnerships; intellectual property policy; technology readiness and transition.
Current Research: Experiential Engineering Education via Innovation and Invention. Focus on the Technical Design, Energy System, and Medical Engineering (MedEng) Design Innovations via Prototyping and Proof of Concept.
Past Research: High-Temperature Superconductors, Two-Dimensional Electron Gas, and Engineering Physics Education.
Theoretical and applied electromagnetics, theoretical and applied optics, scattering theory, wave inverse problems, noniterative inverse scattering, physics-based signal processing and imaging, change detection theory and applications, compressive sensing, electromagnetic information theory, analysis and design of optical and quantum holographic detectors
Devices, circuits and sensing; antenna analysis, modeling, design, and optimization; subsurface scattering analysis; computational methods of electromagnetics; novel radar system specification and design; explosives detection
Development and empirical testing of neural network models of visual perception, notably the segmentation, grouping, and contour formation processes of early and middle vision in primates, and on the transition of these models to technological applications
Using computational methods including Monte Carlo methods, molecular dynamics simulations, and molecular docking calculations to obtain a fundamental understanding of molecular interactions that occur at biological interfaces, such as the pulmonary surfactant system in the lungs
Biogeochemistry of natural and engineered systems; in-situ sensors and instrumentation for high-resolution process characterization; remediation and sustainability in natural and built coastal environments; sensor-driven closed-loop controls for resource optimization in engineered systems; signal processing and machine learning, embedded systems, and sensor networks
Design of analog, radio frequency, and mixed-signal integrated circuits; built-in test and calibration techniques for systems-on-a-chip; on-chip temperature sensors for thermal monitoring and built-in testing; integrated circuits for medical applications
Development of autonomous underwater robots for civil infrastructure and marine sensing; decision support tools for gray/green infrastructure like tide gates; environmental fluid mechanics; biomechanics and mass transfer in living systems
Area of Focus: Information Systems and co-op program director for Cyber-Physical Systems, Data Architecture and Management, Information Systems, Software Engineering Systems, and Telecommunication Networks
Understanding and exploiting the fundamental properties of micro/nanomechanical structures and advanced nanomaterials to engineer new classes of micro and nanoelectromechanical systems (M/NEMS) with unique and enabling features applied to the areas of chemical, physical and biological sensing and low power reconfigurable radio communication systems
Developing chemical approaches to track and quantify important RNA processing events and modifications in single cells; DNA: protein interactions that drive differences in gene expression; understanding differences in RNA expression and the impacts on disease and development
Engineering education with a focus on differentiated curricula. Transportation engineering with a focus on alternative intersection designs. In my current role as a teaching-focused faculty I am not taking on any graduate students at this time.
Engineering education, development of new applied mathematics courses for chemical engineering students. Mentors graduate and undergraduate students. Research in the field of separation technologies, thermodynamics and reaction engineering.
Control Systems and Signal Processing; Robust and Optimal Control, Positive Dynamic Systems, Fault Detection, Observer Theory, Robotics and Distributed Control of Multi-Agent Systems, Control of Biological Systems
Sparse Sensing and Control in Cyber-Physical Networks and Robotics; Distributed Systems Theory and Applications; Network Optimization and Control; Hard Limits and Tradeoff s in Large-Scale Dynamical Networks
Machine Learning for Fisheries, SLAM in the presence of Dynamic Moving Objects, Counter UAS methodologies , Manipulation Underwater, and Imaging in Visually Degraded Environments including underwater and in polar regions
Control systems and mechatronics; stability analysis and control synthesis of dynamical systems with delays; interplay between stability, delays, and graphs; control-systems-aided human-machine systems; engineering education research; disability research; systems biology
Renewable energy transformation, reducing fossil fuel reliance, energy resilience, energy democracy, climate engineering, gender & energy, integrating social justice with climate and energy innovations
Environmental chemistry; geochemistry; the carbon cycle; freshwater, coastal and ocean biogeochemistry; feedbacks between natural biogeochemical cycles and climate change; permafrost; black carbon; aquatic microplastics
Multiphase thermal transport phenomena, acoustic wave bio and chemical sensors and actuators, thermal management of fibers and films, thermal energy storage materials and processing, microchannel cooling systems, nanoimprinting process and applications, MEMS/NEMS fabrication, microfluidics and bioMEMS; nanoscale magnetic assembly and applications
New magnetic and magnetoelectric materials and device physics; integrated magnetic, ferroelectric and multiferroic materials and microsystems for sensing, memory, power, RF and microwave electronics; novel electrochemical sensors for sensing different pathogens and biomarkers for the diagnosis of various diseases, including COVID-19, Alzheimer’s disease, lung cancer, drug abuse, diabetes, etc.
Sensor Devices and Smart Sensor Systems realized through interdisciplinary field of microelectromechanical systems (MEMS); including the design, optimization, fabrication, testing, and networking of such transducers; fabrication of novel micro and nano-sensors and actuators by integrating non-traditional materials using silicon planar microfabrication techniques and exploring phenomenon at the micro-nano interfaces; development of sustainable sensing solutions for biomedical applications including investigation of robust magnetic technologies for interfacing to the brain
Elemagnetic wave propagation in anisotropic media, physics of magnetism, high tc superconductors and weak link devices, and ferrites and composites magnetic metal alloys and magnetic superlattices miniature microwave circuits.
Network-wide pavement and bridge deck inspections: sensor technology for infrastructure; saliva-based sensor technology for disease diagnosis and monitoring; structural health monitoring for bridges; subsurface fault detection using air-coupled GPR systems
development of next-generation DNA and RNA sequencing methods; nanopores as molecular sensors; bioinspired sustainability solutions; optical and electrical analysis of biomolecular systems; electron microscopy and electron-beam shaping of nanomaterials
dynamics of large-scale molecular machines, working to identify the physical principles that guide biomolecular dynamics, using molecular simulation approaches to interpret experimental data from a wide range of techniques, including biochemical, small-angle X-ray scattering and cryogenic electron microscopy
Interpretable AI, IoT, computer simulation, data integrity and big data analytics, data-driven stochastic optimization, blockchain design and development for complex end-to-end cyber-physical system learning and risk management with applications, including biopharmaceutical manufacturing and supply chains, smart power grids with renewable energy, and health care
Air quality; atmospheric chemistry; cloud/aerosol microphysics; sensitivity and uncertainty analysis; multiscale atmospheric modeling and forecasting; climate and Earth system modeling; health impact assessment; eco-environmental sustainability; human-Earth system interactions
Energy storage, advanced manufacturing, multifunctional bio-inspired material from nature; nano/microfabrication of devices and materials; bendable, implantable, and biocompatible electronics; application of sustainable biomaterial, like cellulose, hemicellulose, and lignin, in life science and engineering