86 Result(s)
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Article
Learning control system analysis and design based on 2-D system theory
The connections between two research areas, intelligent control systems and multi-dimensional systems, are established. Two-dimensional (2-D) system theory is used to analyze a class of learning control system...
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Article
Profile Reconstruction in Dynamic Infrared Thermography: Adaptability and Stability
An iterative algorithm for solving geometric inverse problem in dynamic infrared thermography has been proposed in this paper. According to 1D dynamic heat-conduction model and the corrective criterion based o...
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Article
Defending Wireless Infrastructure Against the Challenge of DDoS Attacks
This paper addresses possible Distributed Denial-of-Service (DDoS) attacks toward the wireless Internet including the Wireless Extended Internet, the Wireless Portal Network, and the Wireless Ad Hoc network. W...
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Article
Quantum Mechanical Model of Electronic Stop** Power for Ions in a Free Electron Gas
The electronic stop** power of a free electron gas on a moving charged particle (ion) in a solid is analyzed in the coordinate system moving with the charged particle. By quantum mechanically treating the mo...
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Article
A Computationally Efficient Simulator for Three-Dimensional Monte Carlo Simulation of Ion Implantation into Complex Structures
A physically-based 3-dimensional Monte-Carlo simulator has been developed based on the program UT-MARLOWE which is capable of simulating ion implantation into multi-material systems and arbitrary topography. I...
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Article
Calculation of the Electron Efficiency for a Two-Cavity Gyroklystron Amplifier by Using a Self-Consistent Code
The beam-wave interaction in a Ka-band, two-cavity fundamental gyroklystron amplifier is studied by using a self-consistent nonlinear simulation code. The electron efficiency for this gyroklystron amplifier is...
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Article
Variable-structure torque control of induction motors using space vector modulation
Compared with field orient control (FOC), direct torque control (DTC) is known to provide fast and robust response for induction motors. However, while offering high dynamic performance, classical DTC produces...
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Article
Implementation of Multiple Macroblock Mode Overlapped Block Motion Compensation for Wavelet Video Coding
This paper proposes a hybrid video coding framework based on discrete wavelet transform and multiple macroblock mode overlapped block motion compensation (OBMC). Studying the neighborhood in multiple macrobloc...
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Article
Pattern synthesis of antennas based on a modified particle swarm optimization algorithm
In order to overcome the drawbacks of standard particle swarm optimization (PSO) algorithm, such as prematurity and easily trap** in local optimum, a modified PSO algorithm is proposed, in which special tech...
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Article
Local Coordination Based Routing and Spectrum Assignment in Multi-hop Cognitive Radio Networks
Although Cognitive Radio technology brings efficient spectrum usage and effective interference avoidance, it also brings new challenges to routing in multi-hop Cognitive Radio Networks. Firstly, spectrum assig...
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Article
An intelligent method for real-time detection of DDoS attack based on fuzzy logic
The paper puts forward a variance-time plots method based on slide-window mechanism to calculate the Hurst parameter to detect Distribute Denial of Service (DDoS) attack in real time. Based on fuzzy logic tech...
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Article
EKAES: An efficient key agreement and encryption scheme for wireless sensor networks
Wireless sensor networks are being deployed for some practical applications and their security has received considerable attention. It is an important challenge to find out suitable key agreement and encryptio...
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Article
Design and Simulation of an Ultra-Broadband Ku-BandGyro-TWT for Radar Applications
In this paper, the design of an ultra-broadband Ku-band gyro-TWT amplifier is presented in detail. The preliminary parameters of the interaction structure derived from the dispersion relationship and the linea...
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Article
Wavefront curvature sensor with phase defocus grating
The proposed optimum phase defocus grating for wavefront curvature sensing features an equidistantly quantized two-phase-step and a phase step height of π. The optimum phase defocus grating suppresses the infl...
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Article
Defense against collusion scheme based on elliptic curve cryptography for wireless sensor networks
Wireless Sensor Networks (WSNs) are being deployed for a wide variety of applications and the security problems of them have received considerable attention. Considering the limitations of power, computation c...
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Article
Lattice-basis reduction precoding based on successive interference cancellation design for multiuser MIMO downlink system
Two kinds of lattice-basis reduction precoding schemes based on successive interference cancellation are proposed. The successive interference cancellation (SIC) structure can be obtained by either orthogonal ...
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Article
Design of a Ka Band 35 kW CW Low-Voltage Harmonic Gyrotron
In this paper, a continuous wave (CW) low-voltage second harmonic gyrotron with the conventional cavity has been preliminarily designed and evaluated with self-consistent nonlinear simulation code and the part...
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Article
A high-speed sample-and-hold circuit based on CMOS transmission lines
We introduce the design of a high-speed sample-and-hold circuit (SHC) based on spatial sampling with CMOS transmission lines (TLs). Signal propagation analysis shows that periodically loaded CMOS TLs exhibit f...
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Article
A Compact Thin-Film Sensor Based on Nested Split-Ring-Resonator (SRR) Metamaterials for Microwave Applications
In this paper, we propose a novel metamaterial-based microwave thin-film sensor that incorporates multiple split ring resonators in a compact nested structure. The special feature of the proposed sensor is tha...
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Article
Implementation of dynamic matrix control on field programmable gate array
High performance computer is often required by model predictive control (MPC) systems due to the heavy online computation burden. To extend MPC to more application cases with low-cost computation facilities, t...
