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Driven by higher energy and electricity demand, the world's power grid system has leapfrogged from conventional grids to modern grids, and from isolated urban grids to transregional and transnational interconnected large grids. Some technologies and equipment have been innovated to adapt the acceleration of global energy interconnection. A new type of overhead conductor with a polymer composite core...
Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr2O4 and ZnCr2Se4 single crystals have been performed under magnetic fields up to 10 Tesla and low temperatures. We observed the magnetic resonances originated from the spin dynamics of inter-sublattice exchange and screw spin structure in THz frequency region, which show pronouncedly anisotropic effect. The phase and polarization sensitive...
Each year more and more people are diagnosed with Diabetes Mellitus. As this disease continues to grow, it will have an enormous effect on society. Recently, a computerized noninvasive diagnostic method was proposed using facial block color features with a sparse representation classifier. This method eliminated the need to extract bodily fluids, and any feelings of pain and discomfort associated...
In order to realize geomagnetism aided navigation (GAN) in the regions with insignificant geomagnetic characteristic, inspired by the pattern recognition idea, the geomagnetic matching (GM) problem was transformed into statistical pattern recognition and was analyzed from the aspect of pattern recognition. A matching algorithm based on support vector machine (SVM) was proposed. The selection of training...
Flight control software has higher requirements on reliability, as well as real-time performance. What's more, the fault of flight control software not only contains traditional functional fault, but also contains real-time fault. Thus, fault localization and removing for Flight Control software is a huge challenge for relative engineers. To locate and remove those faults effectively, this paper adopts...
A side-scan sonar image often contains a lot of noises and its resolution is very low, the edge of side-scan sonar image is blurred, so these characteristics make it difficult to segment objects. The current common segmentation algorithms generally require setting parameters manually, and these parameters are closely related with the images they collected. Consequently, it is difficult to achieve...
A large number of documents related to its specific business are produced continually by enterprises and institutions in their daily work. To get useful information from these semi-structured documents we have proposed document element block model(DEBM) and applied it in the semi-structured document extraction. The model makes full use of the information contains in the document, not only the structural...
Digital down conversion is one of the key technologies of pulse radar IF receiver, while the traditional DDC implementation methods with existing FPGA cannot meet the requirements for the hardware resource of bandwidth and filter accuracy. In recent years, the development of digital receiver becomes possible as the fast development of microwave integrated circuit technology and the rapid development...
Electrothermal characterization of the advanced SOI FinFETs is performed in this paper, which is based on some analytical equations as well as in-house developed finite difference algorithm. The temperature-dependent properties of thermal conductivities of all materials involved are considered in our simulation, with results validated by the commercial software ANSYS and other analytical solution...
The maneuver control of hypersonic vehicles (HSVs) during re-entry is a challenging work due to the object features of serious nonlinearity, strong uncertainty and fast time variation. In this paper, we design the maneuver control architecture of lateral turning for the HSV first, and then a new self-organizing recurrent functional link network (SORFLN) is proposed to estimate the dynamical uncertainties/disturbances...
This paper presents a method for airport detection from optical satellite images using deep convolutional neural networks (CNN). To achieve fast detection with high accuracy, region proposal by searching adjacent parallel line segments has been applied to select candidate fields with potential runways. These proposals were further classified by a CNN model transfer learned from AlexNet to identify...
In order to autonomously design the optimal descending trajectory for spacecraft soft landing on an asteroid, an onboard guidance based on the bidirectional extreme learning machine (B-ELM) is proposed. The optimization problem is formulated and transformed into a two-point boundary value problem (TPBVP). And then, based on the sample trajectories obtained off-line, a single-hidden layer feed-forward...
Sample quality plays an important role in tracking-by-learning strategies, but the reliable online samples are hard to be obtained due to challenges of variational environments. By modeling how human visual interest actively guiding the seek of salient regions and movements in video sequences, in this paper, a compositional tracking strategy is proposed based on an integrated saliency map, which is...
Moving object localization is a popular study in contemporary computer vision, provided the fact that many challenging problems, such as illumination changes, obstacles, object shape transformation, etc, are still to be deeply investigated and properly tackled in moving object localization for the time being. In this study, a new clustering-based strategy is introduced to realize the moving object...
A robust stability assessment approach is presented to efficiently estimate eigenvalues in microgrids in the presence of bounded uncertainties. Through this method, all possible locations of eigenvalues can be directly obtained, which makes repeatedly eigenvalue calculation unnecessary when dealing with uncertainties. More importantly, a quasi-diagonalization technique is established to reduce the...
Infrared Difference Dust Index (IDDI) is often used as a satellite dust product to detect the change of mineral dust aerosols in the atmosphere. And aerosol optical depth (AOD) is also a main measurement for mineral dust aerosol. To qualify dust loading on the regional or global scale, it is very necessary to understand the relation between IDDI and AOD. Therefore, this study investigates the impact...
So far, the Greenhouse Gases Observing Satellite (GOSAT) and the Orbiting Carbon Observatory-2 (OCO-2) are the only two missions designed to measure the column-averaged CO2 dry air mole fraction (XCO2). To improve our understanding of global carbon source and sink, these two XCO2 products are compared in this study. The result reveals that the OCO-2 XCO2 product show the wider spatial coverage than...
The Global Space-based Inter-Calibration System (GSICS) is an international program formulated by the World Meteorological Organization (WMO) and the Coordination Group for Meteorological Satellites (CGMS) since 2005. It will inter-calibrate the instruments of the international constellation of operational low-earth-orbiting (LEO) and geostationary (GEO) environmental satellites and tie these to common...
The history, current status and future program of the Chinese Meteorological Satellite, i.e. Fengyun satellite (FY) is introduced in this presentation. Currently, there are 2 FY polar satellites and 3 FY geostationary satellites are in operational. The type of the instruments amounted on FY satellites includes the optical imager, the atmospheric sounder, the microwave imager, the atmospheric composition...
In the underwater communication, satellite communication, secure communication and other channels, the channel bandwidth is narrow and the channel condition is relatively poor. Therefore, higher quality and lower rate speech coding is needed. In order to improve the synthetic speech quality and save channel bandwidth, voice activity detection (VAD) technique is introduced to Mixed Excitation Linear...
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