A5107427670- Indoor and Outdoor Localization Technologies
- Ultra-Wideband Communications Technology
- High-Velocity Impact and Material Behavior
- Microwave Imaging and Scattering Analysis
- Speech and Audio Processing
- Landslides and related hazards
- Image and Signal Denoising Methods
- Scheduling and Optimization Algorithms
- Optimization and Packing Problems
- Advanced Image Fusion Techniques
- Image Retrieval and Classification Techniques
- Advanced Computing and Algorithms
- Sparse and Compressive Sensing Techniques
- Advanced Algorithms and Applications
- Target Tracking and Data Fusion in Sensor Networks
- Advanced Data Compression Techniques
- Structural Response to Dynamic Loads
- Scheduling and Timetabling Solutions
- Fluid Dynamics Simulations and Interactions
- Engineering and Material Science Research
Nanyang Technological University
2008-2015
Beijing Institute of Technology
2012
University of Florida
2010
In wireless sensor networks, it is very important to obtain an accurate position of each node. this paper, we consider the potential Ultra Wideband (UWB) signals for positioning due its special characteristics. Accurate angle arrival (AOA) can be obtained using UWB antenna arrays. We propose a new cooperative method based on AOA's. The takes advantages pair-wise AOA's information among all nodes while existing only utilizes from anchor nodes. Then, Cramer-Rao Lower Bound (CRLB) Cooperative...
Ultra wideband (UWB) is a good candidate for indoor positioning, thanks to its ability resolve multipath and penetrate through walls. This study investigates the performance of UWB-based time difference arrival (TDOA) positioning environment, where one or more blind nodes are be localised with aid number anchor nodes. The positions estimated using previously proposed iterative localisation method. achievable accuracy analysed in terms Cramer–Rao lower bound (CRLB), which theoretical on...
Current image representation schemes have limited capability of representing 2D singularities (e.g., edges in an image). Wavelet transform has better performance 1D than Fourier transform. Recently invented ridgelet and curvelet achieve resolving wavelet To further improve the singularities, this paper proposes a new called ripplet Type II (ripplet-II). The is able to capture along family curves images. In fact, special case ripplet-II with degree 1. Ripplet-II can be used for feature...
In this study, the impact responses of concrete debris against soil are investigated. Three types shot at with different incident conditions in experiments. A numerical modeling for process is established and calibrated by experimental results. further study on effect size then carried out based modeling. set formulation presented to predict outgoing velocity angle terms angle. Critical lethality curves derived assumption a critical kinetic energy 79 J.
Due to the limitations of traditional high speed video camera, ultra-wideband (UWB) technology is proposed track debris concrete in explosion. The UWB enabled tracking system composed active integrated tag embedded with size only 25 × mm, four sensors and one locator. successful 2D position test real time an indoor open area 10 meters by 30 indicates feasibility whole future application. Both variation displayed updated when block moves, off-line computed trajectory locator running logging...
Auditor allocation plays a key role in certification body to help minimize labor cost while satisfying client's demands. Different from traditional assignment problem that one agent is assigning perform or more tasks, auditor needs consider industrial features, such as auditor's qualifications, availability, and requirements of rules standards. In this study, we propose an model address the aforesaid features. The multiple dimensional problem. We verified proposed using data obtained...
Recently, Compressive Sensing (CS) has emerged as a more efficient sampling method for sparse signals. Comparing to the traditional Nyquist-Shannon theory, CS provides great reduction of rate, power consumption, and computational complexity acquire represent In this paper, we propose new block based image/video compression scheme, which uses improve coding efficiency. lossy schemes, such JPEG H.264, dominant error comes from scalar quantization. The recovery procedure can help mitigating...