Global ETD Search
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Showing 1 to 12 of 12 for “"Power spectrum density"”.
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Reconfigurable logic test methodologies for ISDN
… with each project. The three projects were, a power spectrum density (PSD) measurement facility for basic-rate ISDN, a bit-error rate test (BERT) facility for basic-rate ISDN, and a passive monitor for basic-rate ISDN. The project work demonstrated how greater test feature integration could be …
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Development of vibration loading profiles for accelerated durability tests of ground vehicles
… accelerated test analysis. The representative Power Spectrum Density (PSD) profile can be generated based on the mission profiles. Then, the driven profile for the sub-scaled accelerated durability test, i.e., the acceleration data can be generated based on the PSD data.
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Improving Golf Putt Performance with Statistical Learning of EEG Signals
… are calculated such as correlation coefficient, power spectrum density and coherence, which are used as features for the classification algorithm. To predict golfers' performance, the support vector machine algorithm is used to classify the EEG patterns into two categories corresponding to …
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Detection and assessment of wood decay – glulam beams and wooden utility poles
… highest magnitude frequency and area under the power spectrum density curve. A 100 kHz signal was sent through the glulam beam. In areas devoid of decay, the received frequency was approximately 100 kHz. In areas where decay was identified, the frequency of highest magnitude shifted lower …
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Vibration isolation systems using hysteretic multiple tuned mass damper oscillators
… interval, which is related to the excitation power spectrum density. In order to introduce hysteretic restoring force to the oscillators and study its effect to the vibration reduction on the main structure the Bouc-Wen differential model of hysteresis is used. The introduction of hysteresis …
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Phase-locked loop, delay-locked loop, and linear decorrelating detector for asynchronous multirate DS-CDMA system
… proposed to evaluate the autocorrelation and its power spectrum density (PSD) of the cross-correlated terms in the presence of multirate multiple access interference (MMAI) under additive white gaussian noise (AWGN) and fading channel environments. The steady-state probability density function …
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Turbulence Modeling and Simulation of Unsteady Transitional Boundary Layers and Wakes with Application to Wind Turbine Aerodynamics
… method that was invoked in the wake. The power spectrum density of velocity components showed that the flow fluctuations were well-maintained in cylinder wake towards airfoil and the hybrid model switched between RANS/LES mode outside boundary layer as expected. According to the …
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Ultra-wideband technology for short-range wireless communication
… radio core idea is to open large amounts of spectrum to a variety of users with little mutual interference between them. While ultra-wideband is being championed by several commercial companies, this technology has not followed the conventional path where commercial interest is preceded by …
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The effects of periodic and non-periodic inputs on the dynamics of a medial entorhinal cortex layer II stellate cell model
Various neuron types exhibit sub-threshold and firing frequency resonance in which the sub-threshold membrane potential or firing frequency responses to periodic inputs peak at a preferred frequency (or frequencies). Previous experimental work has shown that medial entorhinal cortex layer II …
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Integrated Machine Learning Approaches to Improve Classification performance and Feature Extraction Process for EEG Dataset
… The framework first denoised the signals using power spectrum density analysis and replaced outliers with k-NN imputer. Next, window level features were extracted from statistical, temporal, and spectral domains. Basic summary statistics are then computed from the extracted features to feed into …
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The influence of high harmonic force on fatigue life and its prediction via coupled inline-crossflow VIV modeling
… to generate a stress time series based on the power spectrum density (PSD) plots similar to those of the experimental signals. It is shown that the high harmonic signal has a significant influence on the fatigue life, while the wide-band chaotic components have limited effects. Thus, prediction …
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Nástroj pro automatické hodnocení kvality EEG dat
Tato práce se zabývá návrhem nástroje pro automatické hodnocení kvality EEG dat. V teoretické části práce se nachází teoretický základ z oblasti anatomie centrální nervové soustavy a mozku, následuje popis vzniku a šíření akčního potenciálu nervovou soustavou. Dále se teoretická část práce věnuje …