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The hardware-in-the-loop (HIL) simulation testing for the controller of three-level photovoltaic grid-connected inverter is studied by RT-LAB, and a HIL simulation, modeling and testing scheme for photovoltaic grid-connected inverter is presented based on FPGA simulation and eHS modeling technology. First, a HIL testing platform, which contains PV array model, three-level photovoltaic inverter power...
A new measurement of large scale column structure's centroid with coordinate measurement system was designed. The measure principle, equipment and measure process of this new method were discussed, and then the measurement uncertainty was analyzed. The results showed that this method has a high precision especially for the large scale column structure. So this method not only has the merit of flexible...
Image fusion quality assessment method based on Error-sensitive Model was seen as the issue of the fidelity of the image signal rather than fidelity of image information.Because they didn't consider the human visual characteristics,they are inconsistent with the subjective evaluation.In this paper,based on SSIM algorithm,considering the fidelity of image information,it will combine the structural...
For descendant axis (//) and predicate ([]) structural features of XPath with different depths of the XML data stream recursive query processing problem, a method based on pushdown automation is presented. It made the kinds of step transform into the corresponding processing modules, then these modules are combined by the algorithm, the top-down tree query model is built. Because the multi-match will...
A novel design of modulator for Chinese Digital Terrestrial Multimedia Broadcasting Standard is presented. Different from the traditional system of digital TV modulator, a simplified GPS/Compass2 dual timing receiver is embedded into the Single Frequency Network(SFN) block, which is removable and independent from the modulator. With this modification, the timing availability and the feasibility of...
Static privacy protection technologies available are not well protected already published data, and dynamic protection technology is becoming a research hotspot. In this paper we propose an effective method of privacy protection based on dynamic protection technology, analyzing how inferences from multiple releases may temper the category of privacy and resolving the problems of privace loss of inference...
In modern aeronautical communication system, researchers find it hard to distinguish signals considering the fact that receiver intercepts various and overlapping band signals, so how to detect the desired DS signal from multiple signals becomes a problem in the aeronautics communication. According to the multiple antennas structure of the aeronautical communication, this technique gives us a new...
In some OFDM systems, time domain CP (cyclic prefix) and scattered pilots are used for synchronization and channel estimation. While in novel OFDM broadcasting systems, such as China Digital Terrestrial Multimedia Broadcasting Standard (DTMB), PN sequences rather than cyclic prefixes are inserted as guard interval between N-point IFFT blocks, which are also used as training symbols. This paper proposed...
In August 2006, the Chinese digital terrestrial television broadcasting (DTTB) standard named "Frame structure, channel coding and modulation for digital television terrestrial broadcasting system" (referred to as DTMB) was published. This work presents a design of modulator for DTMB standard. In this modulator, all patterns of the DTMB standard are implemented and the Single Frequency Network...
Information delivery service(IDS) is an important part of Information Grid and with the expansion of network and users, Quality of Service(QoS) has been the basic requirement of IDS. The architecture of Content Delivery Network, the frame of Data Delivery Service and the property of Battle Formation(BF) are firstly analyzed and a battlefield information delivery model is put forward based on BF, which...
A query processor called lazyDFA which is created based on the automaton technology is an effective method to solute the problem of XPath query on XML data stream.This paper proposes the optimized algorithms aimed XPath which use the semantic and structural information of DTD in order to improve the efficiency of lazyDFA.The experimental results show that optimized algorithms can effectively accelerate...
In the embedded real-time image processing system, moving mini point target was detected and tracked. The self-adaptive threshold division and corresponding matching method were employed to detect the moving target and restrain the background noise. And with the memory extrapolate image processing method, the sheltered target was tracked. According to the requirement of image data and algorithm complexity,...
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