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This paper presents a 15-bit ΔΣ ADC with 10kHz-BW which can handle 30V CM voltages with high AC CMRR (in excess of 115dB at 10kHz) while operating from a 1.8 V supply. An HV capacitively-coupled chopper at its input enables the accurate sampling of input signals beyond the supply rails. Chopping is used to mitigate the ADC's offset and to enhance its CMRR, especially at high frequencies.
Recently, the state estimation issue of a TCP/IP network has attracted much attention from different communities. In this paper, a terminal sliding-mode observer (TSMO) is proposed based on a fluid-flow model of a TCP/IP network to estimate traffic flow states. A novel control strategy is proposed to fasten the convergence of the estimation error for average congestion window (ACwnd). Furthermore,...
There has been a desirable trend in recent years towards Electric Vehicles (EVs) contributing less air pollution and noise pollution than internal combustion engine vehicle. EV charging/discharging problem brings a new challenge to the power operation and control. In this paper, the charging/discharging problem is modelled by noncooperative game theory, the payoff function of this model not only maximizes...
In recent years, the high resolution, high precision and high sensitivity telescopes have been widely developed for astronomical observation in the world, such as SKA, Arecibo, ALMA and MingantU SpEctral Radioheliograpy (Muser). Along with these newly developed modern telescopes, a “big data” challenge was raised for data storage and processing. For example, Muser produces about 4.3TB raw data for...
Ionosphere is an important space environment near the earth. Its disturbance would result in severe propagation effects to radio information system, thus causing bad influences on communication, navigation, radar and so on. The total electron content (TEC) is an important parameter to present the disturbance of ionosphere, so TEC forecast is very meaningful in scientific research field. In this paper,...
This paper makes the first attempt to utilize convolutional neural network (CNN) for classification of solar radio spectrums. The solar radio spectrum is a two-dimensional gray-scale image with one dimension of frequency and the other of time. Taking the advantages of CNN, we can efficiently learn the distinct characteristic of different types of spectrum, and further classify them even more accurate...
This paper makes the first attempt to utilize long short-term memory (LSTM) for classification of solar radio spectrum. A solar radio spectrum is a gray-scale image representing solar radio radiation over multiple frequency channels and in a short time period. The vertical and horizontal dimensions of a spectrum correspond to frequency channel and time, respectively. Intrinsically, time dependence...
This paper presents an NPN-based temperature sensor intended for the temperature compensation of the metal shunt resistor of an integrated current sensing system. The sensor was implemented in a 0.18 HV BCD CMOS technology and occupies 0.16mm2 After a one-point trim, its inaccuracy is less than ±0.4°C over the industrial temperature range (−40°C to 85°C). It also achieves 14.8niK resolution in a 7ms...
The consensus-based hybrid Kalman filtering problem is investigated for a class of hybrid systems with multiplicative noises. Here, we consider the system with linear state equation and nonlinear observation equation. A connected undirect graph is employed to represent the information exchange among the sensor nodes. Based on the hybrid approach (linear and nonlinear), a new hybrid Kalman filter is...
Cross-linked polyethylene (XLPE) insulation cable is the main type of cable in use now. Its main insulation is aging with the increasing of service years. Two methods are used to diagnose the condition of the cable insulation-polarization/depolarization current (PDC) and frequency domain spectroscopy (FDS). The PDC is a time domain method, while the FDS is frequency domain. In this paper, we put forward...
As cable insulation failure usually started with PD activity, a PD detection system based on pulse current was built to study the PD characteristics of typical defects in XLPE cable. To facilitate the test, the oil cup test terminal was used. Considering the installation procedure, three different kinds of insulation defects in cable accessory samples were made, which were knife incision defect, metal...
Electrified railway has advantages of high speed, heavy load, high energy utilization and good economic benefits. However, its access to grid will bring about power quality problems such as harmonics, three-phase imbalance and reactive power, which goes against safe and economic operation of power system. In this paper, power quality issues especially harmonics, negative-sequence and reactive power...
In this paper, we propose a robust collaborative tracking algorithm based on interest points detection and template matching in sparse representation framework. In the proposed tracker, the target dictionary and the candidate dictionary are constructed with the patches around interest points of the previous frame and the current frame, respectively. The correspondence between target points and candidate...
HEVC is an emerging new standard for digital video compression, which is regarded as a successor to H.264/AVC standard. It still belongs to block-based hybrid video coding framework. The block patterns range from 4×4 to 64×64 blocks, and DCT is extended from 4×4 to 32×32. 2D-DCT for image is performed along the vertical and horizontal directions, so it is good at the energy compaction of residual...
Lamb wave scattering in an infinite, isotropic, homogeneous and linear elastic plate which contains a pair of surface-breaking inclined notch is evaluated. An inclined crack can be approached by vanishing the width of the inclined notch. The scattering of Lamb waves from geometric discontinuities involves all these wave modes which contain a finite number of propagating modes having real wave-numbers,...
Mistuned blades are inevitable in compressor, and modal parameters of mistuned blades will change significantly compare with tuned blades. In this paper, mistuning stiffness is introduced and a lumped parameter model of coupled multi-blades is established. Mode localization of mistuned blades is analyzed by this model. When a crack appears in mistuned blades, local flexibility method is used to analyze...
Based on the basic principle of the sandwich piezoelectric transducer, a high-power ultrasonic horn which can be used for viscosity reduction of heavy oil and pour point reduction of crude oil with high pour point was proposed and designed. The basic frequency of the horn is 16.86 KHz, and its input electrical power is 1 kW. It can operate continuously at 100 centigrade on the industrial scale. Firstly,...
solar radio observation is still an important, in some situation the unique tool to obtain the solar emission details for solar radio physics study as well as for space weather forecaster. In this paper, based on the existing 2–20m diameter parabolic antenna in Ming-An-Tu Observing Station in Inner Mongolia, a new plan for a meter spectra interferometer is introduced, which will have good performance...
The cooperated welding trajectory planning problem of multi-robot system without gripper tools is studied in this paper. By taking a master-slave dual robots cooperated welding system as the research object, a multi-robot cooperated trajectory planning approach based on the closed kinematic chain model is proposed. Firstly, orientation and position constraints between weld seams and the welding gun...
This paper proposes a sliding-mode observer for real-time DDoS detection on network routers, which will be used for connection-oriented services. The developed observers estimate the traffics going through the routers and identify those connections without the following-up packets based on the real-time queue length information inside the routers. These identified traffics are suspicious DDoS attacks...
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