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Photonic crystal (PhC) heterostructures combining segments of slightly different PhCs have been used to develop photonic devices, such as high-performance add/drop filters and microcavities with ultrahigh-quality factors. In this paper, we present a highly efficient computational method for simulating PhC heterostructure devices based on a two-dimensional (2-D) model. The method delivers high-accuracy...
Laser interference lithography (LIL) is an established fabrication technology for micro and nano scale structuring of periodic and quasi-periodic surface patterns. This paper presents a Five-beam Interference Pattern Model for laser interference lithography. It can be programmed to obtain images of interference results showing interference intensity distributions. The majority of 2-5 beam interference...
Sampling is the bottleneck for ultra-wideband (UWB) communication. Our major contribution is to exploit the channel itself as part of compressed sensing, through waveform-based pre-coding at the transmitter. We also have demonstrated a UWB system baseband bandwidth (5 GHz) that would, if with the conventional sampling technology, take decades for the industry to reach. The concept has been demonstrated,...
This paper presents a distributed particle filter over sensor networks. We propose two major steps to make a particle filter to work in a distributed way. The first step is the estimation of global mean and covariance of weighted particles by using an average consensus filter. The second step is the propagation of the estimated global mean and covariance through state transition distribution and likelihood...
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