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Underwater acoustic (UA) channel is often affected by strong impulsive noise. In this paper, a compressive sensing based iterative algorithm is proposed to accurately estimate the channel state information and mitigate the impulsive noise, which is important to ensure high-speed data transmission in UA orthogonal frequency-division multiplexing communication systems. By exploiting the sparsity of...
People are using on daily basis websites, mobile applications, and online software nowadays. Major mobile and desktop software applications have been moved to cloud computing environment that allows users to interact with a variety of applications on the move and pay only for additional usage of services on-demand. Each online application has its own terms of service, data privacy agreement that needs...
This paper proposes a power-efficient capacitor-array-based digital-to-time converter (DTC) using a constant-slope approach. Fringe-capacitor-based digital-to-analog converter (C-DAC) array is used to regulate starting supply voltage of the constant slope fed to a fixed threshold comparator. The proposed DTC consumes only 15 μW from a 1V supply, while achieving fine resolution of 103 fs when running...
Osteonecrosis of the femoral head is caused by inadequate blood supply to the affected bone. The bone decay process due to lacking blood supply would be likely to be accompanied by the formation of gas-filled pores. We have introduced diode laser absorption spectroscopy to successfully detect water vapor signals from pores in the femoral heads retrieved from hip replacement operations in 19 patients...
Shapes are the outline of objects, which are expressed by closed curves. Since we usually extract the shape from the binary image, the shapes are a kind of grid-based data in engineering practice. In this paper, we firstly propose a discrete curve model for the grid-based data. Based on this model, the curves are represented by their direction functions in discrete form. Furthermore, we propose stretching...
The basic principle of Fryze-Buchholz-Dpenbrock (FBD) theory is analyzed, which is used to construct the static var compensator(SVC) control strategy. In order to avoid the limitation of low pass filter(LPF), the least-mean-square(LMS) adaptive filter theory is combined with FBD algorithm to detect fundamental positive and negative sequence currents, which are used to calculate the equivalent susceptance...
This paper presents a concurrent high-efficiency tri-band power amplifier with the continuous class-E mode. The continuous class-E power amplifier can perform high-efficient concurrently at some operational frequencies by manipulating the fundamental and second harmonic impedances of the transistor. After selected the design parameters of the proposed tri-band power amplifier, the output and input...
A novel three-section transmission line based T-type dual-band impedance transformer (DBIT) with its closed-form design equations is proposed in this paper. The proposed impedance transformer could transform two different complex impedances to a resistive load at two arbitrary real frequencies. A section transmission line is employed to transform the two different complex impedances to the same complex...
Aerial surveillance and monitoring demand both real-time and robust motion detection from a moving camera. Most existing techniques for drones involve sending a video data streams back to a ground station with a high-end desktop computer or server. These methods share one major drawback: data transmission is subjected to considerable delay and possible corruption. Onboard computation can not only...
A standoff 3-D imaging radar based on 4Tx-16Rx MIMO array at 340 GHz is presented for security body scanning. FMCW signals with 20 GHz bandwidth were electronically beam formed by the array in horizontal dimension and focused to narrow beam lines by an elliptic cylinder in elevation. Experiment results indicated that the imaging resolutions at a distance of 4-m are about 14-mm, 12mm, and 10mm in horizontal,...
In this paper, we discuss the limitations of phased arrays for 5G massive MIMO systems. The multibeam radiation patterns produced by a full phased array, a phased array with fixed sub-arrays, and a phased array with segmented phased sub-arrays are compared via illustrative examples. In fact, conventional phased array can only improve the link gain or the coverage, but couldn't enhance the capacity...
Behavior or human action recognition is one hot research topic in real-time video surveillance system. Dangerous accidents consist of dangerous actions by one or more persons. Thus, action recognition is very important for dangerous accident recognition. If videos captured by public cameras especially dangerous actions related videos can be processed and analyzed immediately to provide an early and...
Sealed deep groove ball bearings (SDGBBs) are employed to perform the relevant duties of in-wheel motor. However, the unique construction and complex operating environment of in-wheel motor may aggravate the occurrence of SDGBB faults. Therefore, this paper proposed a novel feature extraction from vibration signals which performance should owe to artificial hydrocarbon networks (AHNs). AHNs are a...
The pollution of oil spill troubles people's health unquestionable seriously and restricts the development of coastal economy, severe oil spill will manipulate the ecological environment for quite a long period, and lead to some marine organism extinctions. Introduced an oil spills real-time monitoring system based on ultraviolet fluorescence, which can achieve the function in all weather, real-time...
Underwater topography can be imaged using remote sensing methods. However, current-topography interaction constitutes the weakest link in the procedures of remote sensing imaging mechanism of underwater topography. Some researchers have studied the effect of simplified topography on a parallel or vertical tidal current field. In this research, we analyzed the modulation effect of skew topography (including...
In this letter, we present a business process flow of marine target detection using GF-3 SAR data. It includes 12 kinds of imaging modes and 3 types of polarization. The detection method for the single polarization data is a Double-Parameter Constant False Alarm Ratio (DP-CFAR) algorithm. For double polarization data, a pixel level fusion strategy between two single polarization data is used. For...
To deal with the difficulties of large time-varying delay, seriously nonlinear and strong disturbance in the hot-dip galvanizing line (HDGL) control, this paper proposes a novel ANN based modelling and prediction method for the coating weight, the proposed method is then applied to a real plant at Valin LY Steel Co., Loudi, China. The prediction model is built through data pre-processing, data clustering...
Design thinking is considered as a creative, humancentred, participative, exploratory and problem-solving process that values different perspectives of a problem. In this study, we bring the design thinking in a curriculum framework of K-12 game creation by App Inventor which is currently popular block based programming environments for fostering Computational Thinking. In a case study on a middle-school...
Co-channel interference is a dominant limiting factor for LTE uplink system capacity. BS (Base station) MMSE-IRC (Minimum mean square error — interference rejection combining) receiver, as a promising approach for spatial domain interference handling, is introduced in LTE-Advanced Release 13. This paper firstly gives the signal model and receiver structure for BS MMSE-IRC. To evaluate MMSE-IRC performance...
Recently, a new multiple-input multiple-output (MIMO) transmission scheme termed as receive spatial modulation (RSM) is proposed, which activates a subset of receive antennas to carry additional information bits through the index domain. In this paper, a novel variant of RSM, which is referred to as enhanced RSM (ERSM), is proposed to further improve the system performance, especially in high-mobility...
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