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A theory is developed for quantifying fault detectability and fault isolability properties of static linear stochastic models. Based on the model, a stochastic characterization of system behavior in different fault modes is defined and a general measure, based on the Kullback-Leibler information, is proposed to quantify the difference between the modes. This measure, called distinguishability, of...
The random demodulator architecture is a compressive sensing based receiver that allows the reconstruction of frequency-sparse signals from measurements acquired at a rate below the signal's Nyquist rate. This in turn results in tremendous power savings in receivers because of the direct correlation between the power consumption of analog-to-digital converters (ADCs) in communication receivers and...
The most promising device in the Nano scale range are based on multiple gate structures such as double-gate (DG) MOSFETs. These devices could be used for high frequency applications due to the significant increase of the transition frequency fT for these devices. For low noise radiofrequency applications, high frequency noise models are required. In this paper, compact channel noise models valid in...
a secondary image denoising model based on the local energy operator is proposed. Since details and textures always will be compromised in the process of denoising, a local energy operator and a noise-texture operator are proposed. Combined with Weickert's coherence-enhancing model, the textures and details filtered by mistake during the process of denoising can be extracted as much as possible. After...
Tacan is a military omnibearing and distance measurement system, and it is an important system in L-Band. As there are so many equipments work in L-Band, the electromagnetic environment is very complex and EMC problems affect the function of Tacan. In-band narrowband noise is the noise that leads to EMC problem usually. In order to analysis the effect of in-band narrowband noise to Tacan, behavioral...
Shortwave radio is an very important part of an aerial communication system, however it is always confronted with the electromagnetic compatibility (EMC) problem when it works, so it is necessary to analyze its communication characters and the interference cases. This paper build the shortwave communication system model based on ADS, which includes the transmit and the receive part, to simulate the...
In this paper, a study of the minimum noise figure of a given SiGe Heterojunction Bipolar Transistor (HBT) varying the bias point at different frequencies is implemented; the study includes a comparison between results obtained from computational simulation and analytical expression with measurements reported previously.
A new code family for Spectral Amplitude Coding Optical Code Division Multiple Assess (SAC-OCDMA) system has been proposed in this paper. The new code family we call it Dynamic Cyclic Shift (DCS) code. The DCS code has many advantages. However, the DCS code can be generated without code parameter limitation. In addition, the shorter code length and variable cross correlation (λc ≤ 1) of the DCS code...
A binaural sinusoids+noise synthesis model is proposed for reproducing interior aircraft sounds. First, a method for spectral and spatial characterization of binaural interior aircraft sounds is presented. This characterization relies on a stationarity hypothesis and involves four estimators: left and right power spectra, interaural coherence and interaural phase difference. Then we present two extensions...
This paper proposes a model-based text line segmentation algorithm for machine-printed document images. The model is based on geometric configuration which uses the interline spaces rather than the text lines. The paper proposes an objective function whose maximization leads to the optimal solution. The proposed interline space model provides the primary advantage of script-free nature. Additionally...
This paper presents a novel signal analysis method by combining ICA and EEMD algorithms, which can be used for decomposition and feature extraction of non-stationary random signals. The features of ICA and EEMD algorithm were analyzed. Simulations verified the feasibility of combining the two algorithms. The ICA and EEMD combined algorithm has good validity and practicality in the impact acceleration...
Shipping-radiated noise include mechanism noise, propeller noise and water-power noise. Propeller cavitation noise is the main noise when cavitation happens. While the shipping cavitation developed, the fall measure of per times frequency minished gradually in high frequency. In this paper, analyse the condition of cavitation, and establish propeller cavitation spectrum model, finally interpretation...
This work provides a new metric for SEU reliability studies. This metric is based on transient I–V responses extracted from a RC analytical model, in order to detect a SEU threshold.
In this paper, we discuss the analysis of behaviors by lecturer and students in lectures. In lectures, the relationships between lecturer and students depend on not only contents but also the loudness of speech and gestures by lecturer. The behaviors consisting of head and eye movements by students can often represent how they have the interest with the lecture. First, we extract the loudness of speech...
This paper presents a novel approach to RF tuner modeling, called composite modeling. The RF/analog blocks are composed by analytical models, obtained by selecting, configuring and merging of pre-defined attributes; these attributes are closed-form analytical representations of the analog signal-processing functions (gain, filtering, frequency conversion, etc.) and the non-idealities considered (noise,...
This study investigates the behavior of EMI noise reduction through a simple 2-layered printed circuit board cavity, as a ground (GND) via is placed in proximity of a signal (SIG) via. Provided that the maximum frequency of the signal's harmonic content is known, an algorithm which predicts the maximum distance at which the GND via placement will effectively provide noise reduction has been developed...
This paper proposes a method for determining electromechanical mode estimate accuracy by relating mode estimate error to residual values. Mode frequency and damping ratio were estimated using Prony analysis and residuals were calculated for a 17-machine model with varying levels of load noise. Mode estimate error and residuals were found to increase proportionally to each other as noise values were...
The article reviews the stable logic analysis model of complex systems or steady multilateral systems with two noncompatibility relations. With this in mind, five indexes (identification criterion, fluctuation criterion, signal noise ratio criterion, position criterion, risk criterion) of Global-Local Algorithm have been selected to search the stable center of complex system of experiment design....
Traditional rough set of noise data, the lack of adaptability, lack of flexibility or robustness, for the engineering data can not distinguish between equivalence classes of edge region of overlap with the collection, resulting in loss of many valuable engineering information. Strong noise in the actual engineering data over-fitting due to reduced ability to distinguish the object, its limitations...
In recent years, the total variational model proposed by Rudin, Osher and Fatemi (ROF) has been often used in image restoration. As the numerical iterations increase, ROF model may produce the staircase effect while deblurring the noise effectively. Another fourth-order PDE model proposed by Lysaker, Lundervold and Tai (LLT) can protect more the fine image textures, but its deblurring result and boundary...
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