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Electric springs (ES) have been proposed as distributed devices for stabilizing the voltage and frequency of AC power systems. Similarly, its DC counterparts in the form of DC electric springs (DC-ES), which are connected in series with non-critical loads to form a smart load, can be applied for the voltage stabilization of DC grids. In this paper, configuration of series and shunt DC-ES and their...
An improved chassis countermeasure design that can reduce the noise radiation of Serial ATA Disk on Module (SATADOM) was presented in this article. When 3-Gbps signalling was used in SATADOM, the broadband noise will be induced and to cause radio frequency interference (RFI) problem in the WWAN band. The root-cause of the RFI issues will be analyzed based on the experimental study. The modified shielding...
In order to improve spectrum utilization efficiency of Cognitive Radio (CR) systems, it is important for Secondary User (SU) to get knowledge about Primary User(PU)'s behavior when SU exploits opportunity to access spectrum. Radio Environment Database has recently been proposed to provide information about PU. Traditional advanced spectrum database constructed based on spectrum sensing method assumes...
A fast and efficient algorithm is proposed to estimate the direction of arrival (DOA) of the signals impinging on an uniformly located linear array. Unlike the classical MUSIC method, it is not needed for the method proposed in this paper to have the number of the signal sources known as a prior knowledge. The proposed method only needs the forward recursions of multistage Wiener filter (MSWF) to...
Multifocus image fusion deals with a stack of images that were acquired with a different focus point to get an image with all the objects in the scene full focused. Considered the noise effect, in this paper, we proposed a multifocus noisy image fusion algorithm using the contourlet transform. Utilizing the captured directional information by the contourlet transform, the directional windows are used...
An improved CFAR detector for non-homogeneous clutter environment is proposed. At LFMCW radar receiver, after moving target detection (MTD) and linear-law envelop detector, CFAR detector is usually adopted to detect radar targets, the threshold of CFAR detector should be adaptive to the local background noise/clutter environment. Interfering targets often exist in the leading and lagging windows of...
A bulk micromachined gyroscope fabricated with an improved process flow is measured systematically. It achieves good performance at atmosphere. The driving resonant frequency is 1663.5Hz with a quality factor 195, and the sensing resonant frequency is 1677Hz with a quality factor 200. The R2-nonlinearity is 0.008% within the range of ±43°/s, which is limited by the digital to analogue converter, with...
The new kind of real-time system which can receive, process and transmit data is implemented with 16 bits DSP and FPGA with some other periphery apparatus. It enhances the running-speed, reduces the power consuming and improves systemic dependability due to using FPGA to integrate the whole control functions of circuit. The receiving part adopts data-flow state machine. It mainly resolves the issue...
In this paper, a comprehensive solution for managing abandoned objects is proposed, which means that the system can deal with the objects that are abandoned and removed. The system contains two adaptive abandoned object detection (AOD) methods that are both based on the Gaussian mixture model for real environments. The first method is more efficient than the second one, but the latter is more robust...
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