A 60,000-A dc comparator based on dual-loop control system with self-calibration and mutual-calibration is developed. The dual-loop control principle, which is that the bias winding's current automatically balance...
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To solve the problem of calibrating high-precision heavy direct current comparator and related metering device, a self-calibration method based on small current differential principle is proposed, and the formulas bas...
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The tunability,high power and flexible picoseconds-pulse time structure of terahertz(THz)radiation make the THz free-electron laser(FEL)a very attractive THz source of coherent *** paper focuses on the development and...
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The tunability,high power and flexible picoseconds-pulse time structure of terahertz(THz)radiation make the THz free-electron laser(FEL)a very attractive THz source of coherent *** paper focuses on the development and perspectives of THz radiation sources based on the *** principles of the low gain THz FEL oscillator,the SASE THz FEL amplifier and the supperradiant THz FEL are reviewed briefly,and the key technologies of THz FEL,such as injector,accelerator,undulator and optical cavity,are discussed,*** current status of and future prospects for THz radiation sources based on the FEL are emphasized in this *** research and development have shown bright future in free-electron laser(FEL)THz radiation *** potential applications can be carried out in the field of imaging,material research,biology medicine,communication,diagnostics and many others.
Wide-area backup protection is a novel technique presented in recent years, which uses multisource information to make fault identification decision and availably prevents catastrophic blackouts. However, the property...
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An ultra high voltage (UHV) AC tie line that connects North China and Central China power grid has been put into operation in 2009. This paper presents a method to calculate the peak value of active power oscillation ...
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Non-ideal scattering centers exist commonly on radar targets. The scattering characteristics of them induce additional modulation or components to the micro-Doppler. Two typical kinds of non-ideal scattering centers a...
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ISBN:
(纸本)9781849196031
Non-ideal scattering centers exist commonly on radar targets. The scattering characteristics of them induce additional modulation or components to the micro-Doppler. Two typical kinds of non-ideal scattering centers are analyzed and micro- Doppler model of the scattering centers on the ring structure of precession targets are introduced as a detailed example. The experimental results demonstrate the model.
Parallel multi-circuit cable lines are wildly used to improve the transmission capacity of urban power grid, but the study on sequence impedance parameters' asymmetry of multi-circuit cable lines is not available....
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The Solid state Transformer (SST) is one of the key elements in Smart Grid. Building as many hardware and multiplying SST devices is expensive and time consuming in addition to a needed lab space and safety measures. ...
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A new scheme of communication channel reconstruction technology (CCRT) for wide-area protection (WAP) under extreme catastrophe scenarios is proposed for the purpose of safeguarding the safety and reliability of relay...
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The spatial uncertainties of atom force microscopy (AFM) tip position hinder the AFM based nano-manipulation. Although the landmark based tip localization can be applied to improve the tip position accuracy in the tas...
The spatial uncertainties of atom force microscopy (AFM) tip position hinder the AFM based nano-manipulation. Although the landmark based tip localization can be applied to improve the tip position accuracy in the task space, the PZT nonlinearity and system drift are still a challenge to compensation performance when the tip is positioned far from the landmark. Therefore this paper proposes an active landmark configuration. This method first estimates the nearby area called as the landmark domain around the target position, and then actively manipulates the landmark into the landmark domain by using virtual hand to improve the positioning accuracy. Simulation and experiment illustrate the validity of the proposed method.
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