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A class of dual-rate system with a fast control updating rate and a slow output sampling rate is considered. Lifting technology is applied to derive lifted state space model and a subspace equation for dual-rate systems. From the subspace equation, the dual-rate predictive control law is calculated from a set of input/output (I/O) open-loop experimental data and, thus, this approach is data-driven...
This paper provides a brief introduction of the theory and applications of quantum control, as well as research works of scholars in Tsinghua University in this field.
A free space miniature optical spectrometer is demonstrated by utilizing a hole array as the dispersive component. Tikhonov regularization method is used to make the reconstructed spectrum similar to the original one.
InGaAs gate-all-around (GAA) MOSFETs with implanted source and drain (S/D) structure have been demonstrated which offer large drive currents and excellent immunity to short channel effects down to deep sub-100 nm channel length [1–2]. In this work, we fabricate n++ raised S/D InGaAs GAA MOSFETs with 10nm or 20nm thick nanowires and 200nm channel length. Maximum Ion over 1 mA/μm at Vgs-Vt=1V and Vds...
Stimulated Raman scattering (SRS) is one of most efficient methods for generating new laser lines. In recent years, SRS in crystalline Raman media have attracted much attention for the advantages of high Raman scattering gain, favorable thermal conductivity and good mechanical and chemical stability [1-3]. So far most crystalline Raman lasers focus on Stokes generation. In contrast to Stokes generation,...
Nonthermal atmospheric pressure plasmas have attracted much attention for their convenient applications on surface modifications, thin film deposition, biological sterilization and inactivation et al. Most atmospheric pressure glow discharges (APGDs) are generated by sinusoidal excitation with repetition frequency from kilo hertz to mega hertz. Recently, high voltage pulses with duration less than...
In this paper, we present a driver-automation system for providing brake assistance to the driver using the concepts of various levels of intervention. The system offers potential for further development and integration into main stream cars using by-wire technology, both from passenger safety and system usability perspectives. The criticality of the situation of a potential crash is estimated using...
In the paper, the proportions of the sea clutter Intrinsic Mode Functions (ab. IMFs) energy to the whole signal energy and the influence of the target on the proportions are discussed. It is found that the latter low frequency IMFs are weaker when no target is hit, but they are stronger when the target is hit, and the proportions of their energy to the whole signal energy become larger, which could...
We review our recent results in the development of nanostructured photonic metamaterials which provide unprecedented levels of active (nonlinear, switchable, tunable) control over light on the sub-wavelength scale.
To study the effect surface defects imposed on NEA GaAs photocathode, a surface analysis instrument shown in Fig. 1 has been designed, which is composed of a microimager, a 2-D displacement platform, an auto-focus equipment, a computer.
Pulse power systems require power switches to operate at higher speeds and higher temperatures to meet the demand for smaller and higher power density systems. The paper presents the SiC SGTO (super gate turn-off thyristor) designed by SPCO and Cree. The device has superior switching and peak current handling capability and a promising candidate for pulse power applications.
This collaborative effort involves five universities, namely, Arizona State University, the University of Washington-Bothell, the University of Texas at Dallas, the University of Rhode Island, and the University of Central Florida. The paper describes educational technology innovations and software extensions that enable the on-line software Java-DSP to be used in three courses at five different universities...
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