A5047169376- Probabilistic and Robust Engineering Design
- Semiconductor materials and devices
- Advanced Surface Polishing Techniques
- Advanced machining processes and optimization
- Copper Interconnects and Reliability
- Obstructive Sleep Apnea Research
- Semiconductor materials and interfaces
- Time Series Analysis and Forecasting
- Complex Network Analysis Techniques
- Nonlinear Dynamics and Pattern Formation
- Advanced Multi-Objective Optimization Algorithms
- Integrated Circuits and Semiconductor Failure Analysis
- Carbon Nanotubes in Composites
- Non-Invasive Vital Sign Monitoring
- Optimal Experimental Design Methods
- Fault Detection and Control Systems
- Manufacturing Process and Optimization
- Model Reduction and Neural Networks
- COVID-19 epidemiological studies
- Heart Rate Variability and Autonomic Control
- Graphene research and applications
- Advanced Optical Imaging Technologies
- Control Systems and Identification
- ECG Monitoring and Analysis
- Gaussian Processes and Bayesian Inference
Southwest University
2024
Binghamton University
2016-2024
Institute for Scientific Interchange
2022
University of South Florida
2015-2016
Oklahoma State University Oklahoma City
2013
Oklahoma State University
2010-2013
Institute of Microelectronics
2005-2010
Agency for Science, Technology and Research
2010
Singapore Science Park
2005-2009
Dalian University of Technology
2007
Abstract Deep Reinforcement Learning (DRL) has been increasingly attempted in assisting clinicians for real-time treatment of sepsis. While a value function quantifies the performance policies such decision-making processes, most value-based DRL algorithms cannot evaluate target precisely and are not as safe clinical experts. In this study, we propose Weighted Dueling Double Q-Network with embedded human Expertise (WD3QNE). A Q adaptive dynamic weight is designed to improve estimate accuracy...
Obstructive sleep apnea (OSA) is a common disorder found in 24% of adult men and 9% women. Although continuous positive airway pressure (CPAP) has emerged as standard therapy for OSA, majority patients are not tolerant to this treatment, largely because the uncomfortable nasal air delivery during their sleep. Recent advances wireless communication advanced ("bigdata") preditive analytics technologies offer radically new point-of-care treatment approaches OSA episodes with unprecedented...
An investigation on the feasibility of sputtering a diamond block into specially designed three-dimensional cutting tool shape using focused ion beam (FIB) was carried out. The ion-sputtered removal rate, surface morphology and sputtered feature accuracy were evaluated with respect to FIB parameters such as current angle incidence through pockets top substrate. A single crystalline tool, 25 µm length in edge smooth face quality, has been successfully fabricated by FIB. These excellent...
An approach based on combining nonparametric Gaussian process (GP) modeling with certain local topological considerations is presented for prediction (one-step look ahead) of complex physical systems that exhibit nonlinear and nonstationary dynamics. The key idea here to partition system trajectories into multiple near-stationary segments by aligning the boundaries partitions those piecewise affine projections underlying dynamic system, deriving models within each segment. Such an alignment...
Surface finish deterioration in the ultra-precision machining (UPM) process is often attributed to dynamic instabilities. Models and approaches predict UPM instabilities are their infancy. In present work, dynamics its relationship surface characteristics studied using a combined analytical modeling experimental effort. A one degree-of-freedom delay differential equation model that incorporates joint effects of shear ploughing taking place at sub-micrometer scale investigated capture source...
Tantalum migration from the anode sidewall barrier was observed in Cu interconnects/SiOCH low-k dielectrics after voltage ramp and constant stress. This phenomenon found to contribute leakage current as current-voltage (I-V) current-time (I-t) curves. The mechanism of Ta is proposed be due ease oxidation that converts atoms into ions, which subsequently drift along with applied electric field SiOCH dielectric. ionic diffusion dielectric led an increase current, although eventual formation a...
Modern healthcare systems are increasingly investing in advanced sensing and information technology, leading to data-rich environments hospitals. For example, when patients admitted into an intensive care unit (ICU), it is a common practice monitor number of clinical variables, such as blood pressure, heart rate, gas exchange, pulse oximetry metabolic panel. However, heterogeneous measurement methods often lead data uncertainty incompleteness. Missing values exist pervasively for ICU...
The spatial distribution of chemical elements is studied in high-κ, metal-gated stacks applied field effect transistors. Using the transmission electron microscope (TEM)-based analytical techniques energy-loss spectroscopy (EELS) and energy-dispersive x-ray spectroscopy, it demonstrated that Al2O3 La2O3 capping layers show distinctly different diffusion profiles. importance EELS collection angle discussed. Popular models assume La-rich interface are rejected.
A study was carried out to understand the physics of micro-scale mechanical machining (henceforth referred as 'micro-machining') with a micro-size tool using five-axis ultra-precision machine. single crystalline diamond (SCD) sharp cutting edges fabricated by focused ion beam (FIB) employed orthogonal-machine four materials (three polycrystalline metals various grain sizes and one amorphous metal plating material). Since wealth knowledge macro-machining cannot be successfully used in...
The interconnectivity between constituent nodes gives rise to cascading failure in most dynamic networks, such as a traffic jam transportation networks and sweeping blackout power grid systems. Basin stability (BS) has recently garnered tremendous traction quantify the reliability of dynamical In it quantifies capability regain synchronous state after being perturbated. It is noted that detection vulnerable node or generator with lowest BS N−1 critical toward optimal decision making on...
This letter reports on a device layer transfer (based thermal bonding and grinding backside Si) process characteristics of Si MOSFETs flexible substrate, focusing mainly the mechanical bendability resistance to fatigue. The results demonstrated well-optimized process, as indicated by nearly indiscernible performance difference (e.g., subthreshold slope, V/sub th/, I/sub dsat/) before after with substrate. indicate excellent substrate for radius tested down /spl plusmn/72 mm) good immunity...
Abstract The recent COVID-19 pandemic reveals the vulnerability of global supply chains: unforeseen crunches and unpredictable variability in customer demands lead to catastrophic disruption production planning management, causing wild swings productivity for most manufacturing systems. Therefore, a smart resilient system (S&RMS) is promised withstand such unexpected perturbations adjust promptly mitigate their impacts on system’s stability. However, modeling resilience disruptive events...
Studies of micro-cutting have so far largely been carried out on single-phase materials. Due to the size effect, workpiece material microstructure can a significant influence cutting force, chip formation and surface quality. Previous investigations shown that hard particles in materials such as aluminum alloy play role generation defects cracks voids work surface. This paper will examine extent problem during Al6061 T6 propose how it be mitigated.
Obstructive sleep apnea (OSA) is a common disorder found in 24% of adult men and 9% women. Although continuous positive airway pressure (CPAP) has emerged as standard therapy for OSA, majority patients are not tolerant to this treatment due the uncomfortable nasal air delivery during their sleep. We introduce Dirichlet process Gaussian Mixture (DPGM) model predict occurrence episodes based on analyzing complex cardiorespiratory signals gathered from custom-designed wireless wearable...
Time series forecasting has been playing an important role in decision making, control, and monitoring across various fields. Specifically, the of nonstationarity time remains a challenging problem where traditional modeling may not fully capture temporal dynamics. Recent studies applying machine learning (ML) or more advanced hybrid models combining ML decomposition methods have shown their flexible nonstationary nonlinear capability. However, end-effect introduced by still introduces...
Abstract The purpose of this article is to review the key emerging innovations in laser and photonics systems as well their design integration, focusing on challenges opportunities for solutions societal challenges. Developments, significance, frontier are explained advanced manufacturing, biomedicine healthcare, communication. Systems, networks, integration issues then discussed, an framework networking laser‐ photonic‐based services products proposed. concludes with implications agenda...