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Terahertz radar coded-aperture imaging technology can achieve high-resolution, forward-looking and staring imaging by producing spatiotemporal independent signals in the imaging area. Sparse reconstruction algorithm is efficient in the point target imaging, whereas it becomes invalid for complex area targets. This paper proposes a method combining wavelet transform and orthogonal matching pursuit...
Terahertz radar coded-aperture imaging technology based on fast scanning and random phase modulation can achieve high-resolution, forward-looking and staring imaging. Fast scanning with phase controlled needs accurate phase control, while random phase modulation would probably damage its accuracy. To verify the feasibility of simultaneous operation on the two function, this paper deduce the mathematical...
At towered airports, air traffic controllers use an “out-the-window” view for situation awareness of the entire airport environment and for ensuring safe operation on and around airport runways. A controller's view of the runways can be limited by a number of factors, including weather conditions, obstructions, and night operations, making some aircraft movements difficult to detect especially in...
A novel complex of ZnO nanocrystallite aggregates with superior light-scattering capability was synthesized via an eco-friendly aqueous solution method and investigated as a photoanode material for dye-sensitized solar cells (DSSCs). The nanocrystallite aggregate complex was produced by adding a suitable amount of glutamic acid into the reaction mixture as a shape modulating agent. In the absence...
The issue analyses traditional arresters at first, and a novel overvoltage protection is proposed by combining ZnO valve piece and SiC valve piece. The three arresters imposed by switching overvolatge and lightning overvoltage have been tested in PSCAD, and results indicate that hybrid type valve arrester perform excellently.
With the rapid development of Smart Grid, urban distribution networks have greatly expanded, in which power cables have been widely used in many countries. Monitoring of power cables will increase reliability of supply and the integrity of the transmission system. Wireless Sensors Nodes (WSNs) are independent sensors which can sense and monitor certain parameters including temperature, humidity, load...
In this paper, we consider the spectrum sensing problem of detecting a primary signal of a macro cell in a cognitive radio network by employing multiple dense small cell base stations. In consideration of the number of cooperative small cells (sample dimension) is comparable to the number of sample (sample size) due to the dense deployment of small cells, sample covariance matrix is no more a good...
Cognitive heterogeneous cellular network (CHCN), comprised of small cells overlaid with macrocells, is a promising topology to fulfill the explosive demand for high-data-rate transmission by employing cognitive radio technologies. In this paper, a joint polarization and power allocation (JPPA) scheme is proposed for spectrum sharing in CHCN. By exploiting spectrum opportunities in polarization and...
High floating-gate (FG) to FG coupling and lithography limitations have been preventing 2D-NAND flash from further reduction in die size, (e.g., there is no ISSCC paper discussing a 3b/cell 2D-NAND after 2013 [1,2]). Alternatively, since high-density multi-stacked 3D-flash was first introduced as BiCS flash [3], recent dramatic innovations in 3D-flash technologies are rapidly boosting bit density...
This paper proposes a novel polarization-based underlay spectrum sharing scheme in cognitive heterogeneous cellular network (CHCN). Distinguished from traditional spectrum sharing exploiting spectrum opportunities in time, frequency, space and power domains, we exploit spectrum opportunities in polarization domain to enable small cell to coexist with macrocell. The proposed scheme optimizes the transmitting...
This paper proposes a notion called self-verifying execution (SVX). SVX substantially lowers several hurdles that real-world programmers face when adopting traditional program verification approaches. The current focus of SVX is to verify safety properties for programs that implement cloud-API integrations. We envision that, if adopted by real-world programmers, the SVX approach will enable a positive...
Domain Adaptation (DA) has attracted a lot of attention in recent years. DA aims at overcoming the covariate shift in dataset and aligning multiple existing but partially related data collections. In this paper, we propose a new DA algorithm which aligns the weighted subspaces generated from source samples and target samples. The weighted subspaces of source samples are generated using weighted Principal...
Block diagonalization (BD) is a famous conditional precoding algorithm in multi-input multi-output (MIMO) broadcast systems, vector perturbation (VP) and BD are combined which named as BD-VP for short and the receivers' complexity can be reduced by VP at the transmmiter. Furthermore, the performance of BD-VP in diversity is comparable because the maximum likehood (ML) method is involved. However,...
Detection of pedestrian micro-motion can be applied into Public security field. With shorter wavelength in Terahertz(THz), target Doppler effect is more significant, and the penetration ability is stronger. Based on a line structure pedestrian model, this research compares the characteristics of smooth and rough pedestrian in microwave band(12GHz) and THz band(140GHz and 220GHz) with frequency analysis...
Advanced surface surveillance capabilities have been shown to dramatically improve surface safety and aid in situation awareness, but these capabilities cannot be economically justified for small and medium airports. The MITRE Corporation has developed a concept for Low Cost Surface Awareness, built upon the use of commercial-off-the-shelf infrared cameras, computer vision processing, and georeferencing...
This paper presents an distributed consensus formation control using recurrent fuzzy wavelet neural networks (RFWNN) for a group of heterogeneous mobile three-Swedish-wheeled omnidirectional robots (TSWORs) with uncertainties. The dynamic behavior of each TSWOR is modelled by a three-input-three-output second-order state equation and the multirobot system is modeled by a directed graph. By online...
Modern interconnected power grid requires comprehensive and efficient on-line monitoring system to ensure the reliability and stability of the whole power system. This paper firstly introduces the structure and deficiency of traditional monitoring system. Then, relying on high precision operating parameters collected by Phase Measurement Unit (PMU), an improved on-line monitoring method is proposed,...
The high resolution radar imaging has important applications in battlefield reconnaissance target detection and recognition et al.. Compared to microwave used in the conventional radar imaging, the terahertz wave has higher frequency and shorter wavelength and thus can provide larger absolute bandwidth. And the coded-aperture imaging is an expansion of the classic pinhole imaging, which has great...
As one of the important equipment for vibration test, hydraulic shaking table can produce great vibration force and displacement of vibration, , widely applied in engineering field. In the test system of hydraulic shaking table, because of the existence of non-linearities, there exists higher harmonic in system response signal when the shaking table is excited by a sinusoidal signal, making the harmonic...
This paper presents a decentralized cooperative transportation control method with obstacle avoidance using fuzzy wavelet neural networks (FWNN) and consensus algorithm for a group of mobile Mecanum-wheeled omnidirectional robots (MWORs) with uncertainties, in order to get together to move a large payload. The dynamic behavior of each uncertain MWOR is modelled by a reduced three-input-three-output...
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