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Most existing fault diagnosis approaches based on Petri net are applied in transmission network, and usually utilize the action information of relay protection and breaker to form the diagnosis model which is not suitable for radial distribution network. In this paper, a novel Petri net model based on fault information of FTUs is proposed. The rapidity and fault tolerance of distribution network fault...
This paper proposes a novel approach for machine fault diagnosis using industrial wireless sensor networks (IWSNs) and on-sensor calculation. In this paper, the induction motor and vibration signal are taken as an example of the monitored industrial equipment and signal due to their wide use. The discrete wavelet transform and wavelet energy-moment are used for on-sensor machine fault feature extraction,...
This paper proposes an improved energy management strategy for simultaneous power management of the photovoltaic grid-connected system with energy storage. Based on the DC bus voltage and the working states of grid, the PV system is divided into six working modes by the proposed energy management strategy. This can avoid the effect of grid failure on PV system, and achieve the optimal utilization...
This paper studies designing resilient asynchronous H∞ state feedback controller for Markov jump systems with transition probabilities partly unknown. By Finsler's Lemma, and with the help of three matrices with special structure, the problem of inter connection between the Lyapunov matrices and the system matrices is solved. In order to make the theory have more practical value, this paper considers...
This paper presents a novel register file with self-indexed features, targeting the DSP/media algorithm with massive data locality. The self-indexed register file (SIRF) contains 128 high-speed registers, 4 input ports and 4 output ports. It can be accessed with the double circular window mode, or simply with the immediate index mode. SIRF can eliminate write after write (WAW) dependence without register...
Comparing with general side-looking strip-map SAR, the signal property of UAV (unmanned aerial vehicle) spotlight SAR is much more complex and the current method for forward velocity extraction is no longer valid. In this paper, the relationship between the Doppler rate of the spotlight SAR and the motion of the UAV platform is revealed, and a novel approach for forward velocity extraction is proposed...
Aiming at the problem of transient saturation of P class current transformer (TA) in power system, this paper simulates the working condition of TA in 330/110kV short circuit system. The transient saturation characteristics of TA are discussed and demonstrated in the form of exploratory test at transient currents up to 48kA. For the application level of transient saturation, the maloperation of relay...
Mobile edge cloud has been increasingly concerned by researchers due to its closer distance to mobile users than the traditional cloud on Internet. Offloading computations from mobile devices to the nearby edge cloud is an effective technique to accelerate the applications and/or save energy on the mobile devices. However, the mobile edge cloud usually has limited computation resources and constrained...
Aiming at the lack of stability and precision of the traditional greenhouse monitoring system, we constructed the intelligent monitoring system to monitor the light intensity and CO2 concentration of strawberries greenhouses that is based on the STM32 single-chip, by which the light intensity and CO2 concentration can be acquired and displayed at the same time. The serial communication is used to...
This article is concerned with resilient asynchronous H∞ output feedback controller designed for a set of Markov jump linear systems (MJLSs). By Finsler's Lemma, and with the help of two sets of slack variables, the problem of inter connection between the Lyapunov matrices and the system matrices was solved. Resilient asynchronous controller is designed to ensure the controller has the character of...
This paper presents a reconfigurable application specific integrated circuit (ASIC) like image interpolation implementation method. Parallel data flow and pipeline structure are used and optimized for efficient hardware acceleration. The coefficients could be easily reconfigured to support multiple interpolation filter taps and image resolution. We implement this method on a reconfigurable mathematical...
Aiming at the problem of traffic flow detection, a method of detecting traffic flow by GNSS-R is proposed for the first time. Using the dielectric constant difference between the vehicle and the ground, it is possible to judge whether the vehicle is present in the detection area. After receiving the reflection signal in the detection area, and calculating the signal-to-noise ratio and the related...
In recent years, the air target detection applications by using GNSS signal have been exploited. In [1-2], the theory of target detection using GPS forward scatter radar was proposed. When the target is near GPS satellite and terrestrial receiver baseline, the detection mode is forward scatterring radar, and the experimental results verify the theory[3]. In [4], the target detection had been implemented...
The unbalanced grid condition is one of common fault in the power system, the performance of electronic equipment will reduce when the controller designer without considering the unbalanced grid input. The traditional controller design methods of three-phase pulse width modulation (PWM) converter, are based on the instantaneous power model and the double-closed loops proportional integral (PI) controller,...
The absolute in situ calibration of the altimeter missions could insure the regular and long-term control of the altimeter sea surface height (SSH) time series with independent measurements[1]. At present there are mainly four absolute calibration sites over the world, which have been providing absolute biases for multiple satellite altimeters from the T/P mission (1992–2005) to the Jason-3 mission...
Because of the constraints of lowing flying altitude and small platform size, the motion errors of unmanned aerial vehicle (UAV) synthetic aperture radar (SAR) introduce both phase error and nonsystematic range cell migration (NsRCM), which significantly degrade the SAR imaging quality. In this paper, the analytical-spectrum of SAR image is obtained by fast factorized back projection (FFBP) processing...
The proliferation of mobile devices and ubiquitous access of the wireless network enables many new mobile applications such as augmented reality, mobile gaming and so on. As the applications are latency sensitive, researchers propose to offload the complex computations of these applications to the nearby mobile edge cloud, in order to reduce the latency. Existing works mostly consider the problem...
Effect of electric conduction phenomenon on the mixing and thermal homogenization of a dielectric liquid in a spherical reservoir is experimentally and numerically studied. The working fluid is stored in a spherical reservoir with an initial non-uniform temperature distribution, and an electrode pair is placed by the central plane of the reservoir in order to make the resultant Coulomb force penetrate...
We propose and design the lattice codes with finite lattice constellations based on multi-dimensional (more than two dimensions) lattice partitions. The codes are constructed from non-binary irregular repeat-accumulate (IRA) codes. Most notably, we propose a novel encoding structure to ensure that the decoder's messages exhibit permutation-invariance and symmetry properties. With these two properties,...
This paper develops a model of carbon emission reduction in a dual-channel closed-loop supply chain, which includes a manufacturer with capability of remanufacturing and a retailer. The model is based on the carbon trading system and customer's low-carbon preference. We research the carbon emission reduction level and remanufacturing under the ordinary dual-channel supply chain and a closed-loop dual-channel...
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