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Depression is a mental disorder characterized by persistent occurrences of lower mood states in the affected person. According to the study of World Health Organization (WHO), depression will become the second largest cause of illness threatening the life of human beings in 2020, so early detection, early diagnosis and early treatment of depression is very important to save the health and life of...
Recently, Electroencephalogram (EEG) has become increasingly important in the role of psychiatric diagnosis and emotion recognition. However, many irrelevant features make it difficult to identify patterns accurately. Obtaining valid features from electroencephalogram can improve the classification and generalization performance. In this paper, an improved normalized mutual information feature selection...
This paper presents a novel video stitching system for stitching multiple images with 4K and displaying them simultaneously. The key insight of the proposed system can be divided into two stages First, a image of super resolution, such as 16K/32K, and it can be divided evenly into 2×2 or 3×3…etc. Due to the parallelized GPU, we could decode these image simultaneously based on the DXT and JPEG compression...
This paper presents our study on a single-offset parabolic reflector antenna operating at 220 GHz, which offers high gain as well as the capability of beam steering for longdistance high-capacity terahertz wireless communications. With a switch-controlled array placing on the offset focal plane as the primary feed, the beam steering can be realized by selecting single element in different position...
The quasi-optical network (QON) system generally requires that it has a feature of multi-frequency and multi-polarization for transmitting or receiving more channels in a small space to reduce the satellite load. The wire grid polarizer (WGP) can be mainly used into separating double different signals with horizontal polarization or vertical polarization. Due to its frequency irrelevant attribute,...
Aperture usage is one of the most important problem in reflector-based compact antenna test range(CATR). Single reflector CATR provides very low aperture usage, normally 30%, because of the effects of edge diffraction. In order to solve this problem, serrated edges and rolled edges are generally chosen along the reflector's edge to reduce the edge diffraction field inside quiet zone(QZ) of the CATR...
Complex surface conductivity at THz frequencies allowing the propagation of relatively slow plasmonic modes results from the unique electronic band structure of graphene, which is followed by a drastically reduced electrical size of the array unit cell and thereby reconfigurable performance. The reflectarray element based on silicon dioxide substrate and Boron Nitride substrate has been developed...
The performance of an integrated triple wavelength tunable filter based on the electro-optic effect in Lithium Niobate is proposed and analyzed. The filter contains four Bragg waveguide gratings, which separated by three waveguides and three pairs of electrodes. Three pairs of electrodes on both side of three waveguides is used to tune the phase shift caused by the waveguides. As a result, the wavelength...
A wideband circularly polarized (CP) antipodal curvedly tapered slot antenna (ACTSA) based on waveguide is presented in this paper. By employing the ridge on the broadwall of the slotted waveguide, the antenna can obtain compact structure. The proposed antenna can achieve a bandwidth of 20.8% (56 GHz–69 GHz) for both axial ratio (AR) < 3 dB and reflection coefficient S(1,1) < −10 dB and a gain...
The persistent haze weather in North China has aroused extensive attention to environmental protection. Among all pollution resources, the anthropogenic emission by fossil fuel power plants plays an important role. To assist the environmental protection administration monitoring fossil fuel power plants, we propose an effective approach in this paper to learn an integrated model for chimney and condensing...
We demonstrated vortex beam conversion by a resonant with intra-cavity spiral phase plate (SPP). It generated a clean single Laguerre-Gaussian (LG) beam carrying orbital angular momentum (OAM) corresponding to the topological charge of the SPP as we had predicted by investigating the cavity dynamics with modified Markov chains that takes into account the selection rules from the conservation of resonance...
The geometrical characteristic and low-level manually designed features are usually used to detect airports in optical remote sensing images. But it is insufficient to describe airport in low resolution and illumination environment. This paper presents a hard example mining algorithm to train the end-to-end deep convolutional neural network for airport detection in complex situation. Compared with...
Remote sensing images are with the characteristics of large width and sparse distribution of specific targets, so that the extraction of region proposal is necessary before detection. In this paper, we propose a new ship detection method on sea-background remote sensing images, which are generally influenced by clouds, waves and other inhomogeneities. Instead of exhaustive search, the core of our...
How to operate a BFG/coal co-firing boiler in high efficiency is challenging for a gas/solid multi-fuel combustion system. Taking operation data from a real boiler, this study proposes an operation optimization strategy of BFG/coal co-firing boiler based on deep learning. Firstly, the thermal efficiency model is constructed based on deep learning with all the actual sampling data, which outperform...
Fault isolation is an essential step in multivariate statistical process monitoring, which discovers the cause of the detected fault. The common adopted techniques for fault isolation, such as contribution plots, reconstruction analysis, branch and bound, etc., often suffer from the problems of the smearing effect, insufficient historical fault data, and heavy computational burden. In this paper,...
Both the plant parameter4 and delay time of the system may vary in the time-varying system, which makes system identification relatively complex. In this paper, a new system identification algorithm based on subspace method and cross-correlation function is proposed to identify system parameter and time-delay simultaneously. The time delay is identified with the calculation of the cross-correlation...
In industrial process, some important variables such as quality index, efficiency index and concentration of product components are difficult or even impossible to be measured directly due to the limitation of technology. This phenomenon leads to few labeled data and plenty of unlabeled data. Traditional identification method for controlled auto regressive (CAR) model usually cannot deal with unlabeled...
Pulsed thermography (PT) is a widely used non-destructive testing (NDT) technique for defect detection in carbon fiber reinforced polymers (CFRP) structures. Thermographic signal reconstruction (TSR) is often employed to process thermographic data due to its excellent performance in enhancing the contrast between defects and background. However, TSR does not reduce the noise of thermographic data...
Based on the actual data analysis, it is found in this paper that the supplementary air flow rate in the CDQ operation didn't follow the variation of the discharge rate of incandescent coke well, which results in the concentration increase of combustible gas in the exhaust gas and the decrease of economic efficiency. The correlation analysis results show that the introduced derived variables are more...
Vehicular Ad Hoc Networks (VANETs) enable vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications that bring many benefits and conveniences to improve the road safety and drive comfort in future transportation systems. Sybil attack is considered one of the most risky threats in VANETs since a Sybil attacker can generate multiple fake identities with false messages to severely impair...
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