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To integrate different types of devices around Erhai, China, a three layer architecture is introduced. Edge computing nodes are inserted between the server system and the end devices. A metadata model is proposed to unify the representation of devices, measurement and the interactive message between the web services and devices. The edge nodes firstly function as translator between the web services...
This paper presents the design, analysis, and experimental validation of a fault detection and identification (FDI) scheme for dc-dc power electronic converters. The FDI scheme includes two new classes of fault filters: (1) a linear-switched fault detection (FD) filter and (2) a bank of linear-switched fault identification (FI) filters. Both the FD filter and the bank of FI filters have a structure...
A photonic approach to generate phase-coded signal with large frequency continuous tunability based on dual parallel unbalanced temporal pulse shaping (DP-UTPS) system is proposed. In DP-UTPS system, in order to realize the different intensity modulation of the input optical Gaussian pulse in the upper and lower branches, sine signal and cosine signal are respectively applied. When the corresponding...
A method of generating large bandwidth linear chirped microwave waveform (LCMW) with a double frequency-tuning scheme, which is based on an optoelectronic oscillator with frequency multiplication tunable and a recirculating polarization modulation loop (RPML), is proposed. The frequency can be tuned finely by the TOEO, and also can be tuned coarsely while the multiplication factor can be tuned by...
The vehicle lane change decision is a greet challenge for autonomous driving in the dynamic traffic environment. This problem is a sequential decision problem with high dimensional and continuous state spaces. Traditional methods such as the rule-based method is difficult to solve such complex optimization decision problems. Recently, solving the problem by using the reinforcement learning method...
Law enforcement monitoring plays a significant role in preventing and forbidding illegal land use behavior, and provide an efficient method for promoting orderly use of land resources and arable land conservation. In order to optimize the efficiency of law enforcement monitoring, spatial analyzing techniques are adopted to calculate the dynamic change extent of land cover, comprehensive land use degree...
High radio-frequency phase-coded waveform generation based on dispersion-compensated optoelectronic oscillator (DCOEO) is proposed and experimentally demonstrated. The carrier frequency range of the generated phase-coded microwave, which exactly varies from 4 GHz to 45 GHz, can cover Ka band for Radar applications.
An ultra-wideband low-phase noise local oscillator (LO) for the phased array antenna system operating from 11 GHz to 19 GHz is proposed. A phase-locked loop (PLL) frequency synthesizer is adopted in the design where a 100 MHz crystal oscillator is used as a reference frequency. Experiment results show that the output of the ultra-wideband LO agrees well to the predicted results with high stability...
This paper contributes to the convergence analysis of iterative learning control (ILC) for a linear time-varying system with measurement data dropouts, where the data dropout problem is formulated by a Markov chain model. The widely used Bernoulli model for data dropout is a special case of the Markov chain model. A regulating parameter is added to the classic P-type update law. The mean square and...
We propose a 60-GHz radial line slot antenna (RLSA), which is fed by a Butler matrix, for orbital angular momentum (OAM) applications. The Butler matrix is placed at the lower layer and it is based on a post-wall waveguide structure. It has four input ports and it can launch different progressive phase states in the RLSA parallel plate waveguide (PPW). The RLSA in the upper layer is fed by the Butler...
Photonic generation of a linear-frequency microwave waveform with ultra-wide frequency tunable range based on dispersion-compensated optoelectronic oscillator (DCOEO) is proposed and experimentally demonstrated. The microwave carrier frequency of the generated linear-frequency microwave waveform varies from 4 GHz to 45 GHz.
Due to low brightness, the performance of autofocus will serious decline in low contrast images, making it quite difficult to locate the focus region. To tackle this challenge in computer vision, we perform autofocus by conducting a salient object detection method. Based on the mechanism of human visual system, salient object is detected by calculating global saliencies in superpixels. First, the...
We study how the so-called Rao-Blackwellization, which is a variance reduction technique via “conditioning” for Monte Carlo methods, can be judiciously applied for graph sampling through neighborhood exploration. Despite its popularity for Monte Carlo methods, it is little known for Markov chain Monte Carlo methods and has never been discussed for random walk-based graph sampling. We first propose...
Graph sampling techniques via random walk crawling have been popular for analyzing statistical characteristics of large online social networks due to simple implementation and provable guarantees on unbiased estimates. Despite the growing popularity, the ‘cost’ of sampling and its true impact on the accuracy of estimates still have not been carefully studied. In addition, the random walk-based methods...
This work addresses the boundary tracking control of a class of MIMO PDE-ODE cascade systems via learning control approach. Due to the temporal-, spatial- and iteration-varying properties, one of the key steps before the controller design is to reduce the variation of the systems. Therefore, frequency domain analysis techniques are adopted in this work, which can be used to remove the time domain...
This paper presents a kernel-based extreme learning machine (KELM) modeling method for speed decision making of autonomous land vehicles (ALVs) on rural roads. The model is obtained offline via the KELM algorithm using a small number of typical samples collected by an ALV platform on rural roads from experienced drivers. Compared with other typical machine learning algorithms such as support vector...
For a practical intracranial brain computer interface (BCI), minimizing the invasiveness of the electrode implantation is crucial. In this study, we used only one intracranial electrode to implement an online BCI for fast typing. When the subject attended the virtual button containing visual motion stimuli, prominent responses were elicited at the stereo-EEG (SEEG) electrodes within the fMRI defined...
In this paper, we demonstrate an E-band plate-laminated 16 × 16-element slotted waveguide monopulse array antenna with corporate-feed using the diffusion bonding technology. The proposed antenna architecture combines radiating elements, a corporate-feed circuit and a comparator, which are vertically interconnected to achieve a compact size and a reduced loss. The design, characterization, and experimental...
This is a set of research exploring using animation in the Massive Open Online Course (MOOC) / Small Private Online Course (SPOC) for learning information security. We established an Information Security SPOC course, with animations made of GoAnimate for learning. The course content was largely based on the standard of the Certified Information Systems Auditor (CISA) from Information Systems Audit...
The gesture recognition has raised attention in computer vision owing to its many applications. However, video-based large-scale gesture recognition still faces many challenges, since many factors like background may disturb the accuracy. To achieve gesture recognition with large-scale videos, we propose a method based on RGB-D data. To learn gesture details better, the inputs are expanded into 32-frame...
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