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In a video based face identification task, a sequence of frames can be utilized to identify the subject in the video. The information extracted from frames can provide samples of the subject in different head poses and facial expressions and under various lighting conditions which enriches the training process. However, some of these frames may not be useful for identification due to noise from various...
This paper describes a novel method for single-image super-resolution (SR) based on a neighbor embedding technique which uses coupled feature spaces under surveillance scenarios. For surveillance face images, traditional neighbor embedding SR approaches could not offer counterintuitive results because consistency between high resolution images and low resolution images is destroyed by serious noise...
Voting is an intriguing subject. Different voting schemes have different stabilities in retaining the original results in the presence of noise. A candidate could win an election under some voting schemes, even though he/she has less supporters than another candidate overall. This research introduces how sub-regional and regional voting systems change with the presence of concentrated noise. This...
A fast and efficient algorithm is proposed to estimate the direction of arrival (DOA) of the signals impinging on an uniformly located linear array. Unlike the classical MUSIC method, it is not needed for the method proposed in this paper to have the number of the signal sources known as a prior knowledge. The proposed method only needs the forward recursions of multistage Wiener filter (MSWF) to...
A Cascode SiGe BiCMOS low-noise amplifier (LNA) is presented for ultra-wideband (UWB) application. The emitter degenerative inductive technique is employed to achieve input impedance matching and optimize the noise performance. The output impedance matching is achieved by resistance-inductor shunt feedback. The current reuse topology is adopted to achieve high gain with low power consumption. Based...
Most existing process mining methods were designed for ignoring time variability from real business process data, thus it could be hard to implement adaptive process mining. To deal with this problem, a new method of adaptive process mining was proposed in order to mine unremittingly process models of gradual change which represents the improvement stages of business processes and improve accuracy...
In this paper, a mixed-signal interface for gyroscopes is designed, proving the feasibility of interface with PI controller-based self-oscillation and bandpass sigma delta modulator. According to the simulation results, driving circuit is stably self-excited and sensing circuit functions well as a sigma delta modulator.
Window Fourier transform (WFT) is used to reduce the noise effect for the phase image of the digital holographic system and apply it to measure the morphology of the living cells. In advance, the Graphic processing unit (GPU) is developed to increase the computation speed to achieve real-time processing.
Pattern processing exists in various fields like image processing and expert systems. Focus has been put on to high dimensional pattern processing, where there is a big concern of the system performance due to the high dimensionality. In the field of fuzzy inference systems, an exponential explosion in the required computational time complexity is caused by the multi variables in the input pattern...
In this paper, we propose an efficient approach to reduce the effect of the Simultaneous Switching Noise (SSN) for mixed System on Chip (SoC). In order to validate the approach, we have designed a 14-bits 100MHz pipeline ADC as an example. Finite Element Method (FEM) and Method of Moment (MoM) are chose to do the electromagnetic extraction of package and bond-wires separately. The proposed approach...
This study was initiated to design a low noise amplifier (LNA), which could work with ultra low voltage of 0.5V and was optimized for WSN application using SMIC 0.13 μm RF-CMOS technology. The topology of differential inductance degenerated folded cascode based on power-constrained simultaneous noise and input matching (PCSNIM) technique was adopted. Chosen circuit demonstrated a power gain of 16...
A chip-package co-design method is presented for high frequency mixed SoC. Based on the analysis of simulation result of package and chip, a RC circuit which is composed of resistor and capacitor is designed on chip to suppress the affect of Simultaneous Switch Noise(SSN). Consequently, chip-package co-simulation achieves a good agreement with measurement as the co-design method is used to predict...
Original signal is decomposed by wavelet in different scales, the wavelet decomposition coefficients of the real signal are held, and the wavelet decomposition coefficients of the noise are eliminated, then the signal is reconstructed by inverse wavelet transform. Kernel PCA can eliminate the relativity of variables and extract the fault information better, the feature information of the pretreatment...
The noise figure of SiGe HBT for low noise amplification is analyzed and its intrinsic minimum noise figure is expressed analytically. Four types of SiGe HBTs with different transistor geometry of emitter stripe width, emitter stripe length and base stripe number were fabricated using a state-of-art SiGe HBT technology. The considerations involved in the judicious choice of biased current and transistor...
In this study, CFD simulations are utilized to perform flow visualization, torque calculation, efficiency estimation, and noise analysis. For demonstration purpose, an 80 mm-diameter backward-inclined (BI) centrifugal fan is chosen to serve as the research subject. The result indicates that the P-Q curve and the sound pressure level (SPL) spectrum of the experiment are in agreement with those of numerical...
A nonlinear, Digitalized Modified-Logistic Map based Pseudo Random Number Generator (DMLM-PRNG) is proposed for randomness enhancement. We use parameter selection to reduce computation cost and output sequence scrambling to improve the quality or randomness. Statistical test results show that DMLM-PRNG passes all cases in SP800-22, and most of cases in Crush, one of the test suite of TesuU01. When...
This paper looks at the problem of performance enhancement for orthogonal frequency-division multiplexing (OFDM) transmission in intensity modulated, direct detected (IM/DD) optical systems. Due to the unipolarity of the IM/DD channel, asymmetric clipping and associated biasing is inevitable, which results in a significant signal degradation. ACO-OFDM has been previously proposed to avoid this detrimental...
Nowadays X-ray Nondestructive Testing ( NDT ) has played an important role in defect inspection but the X-ray image contains all the information the rays passed by, therefore, it is hard to inspect the inner defect of PCB correctly. The correct inspect is rely on an image reconstruction system. In this study, a X-ray image reconstruction algorism to inspect the defect in a Printed Circuit Board (...
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