Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"frequency filters"”.
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Effect of Sound Cue Frequency Filters on Front/Back Localization Performance for Three-Dimensional Verbal and Non-Verbal Warnings
… is to determine whether or not altering the frequency content of auditory warning signals could affect the localization performance for forward and backward presentation of the signals. The results confirmed previous research conducted by Ehmann (2001) which found that altering the frequency …
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Ein Beitrag zur videobasierten Verkehrszustandsidentifikation
… analyzed with cross-correlation, amplitude- and frequency filters. The resulting data enable the distinction of stable and non-stable traffic flow and the automated identification of traffic congestion. Moreover fundamental diagrams are calculated.
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Magnetic resonance spectroscopy: techniques and applications in thermometry and metabolite mapping
… peak position using a Guassian and Hamming filters and the adaptation of chemical shift imaging from 2D to 3D is useful in obtaining more precise information. Herein, it is shown that both absolute and relative quanti cation can be improved through, respectively, frequency filters and …
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Performance optimization of lateral-mode thin-film piezoelectric-on-substrate resonant systems
… (TPoS) lateral-mode resonators and filters. TPoS is a class of piezoelectric MEMS devices which benefits from the high coupling coefficient of the piezoelectric transduction mechanism while taking advantage of superior acoustic properties of a substrate. The use of lateral-mode TPoS …
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Thermally-actuated piezoresistively-sensed mechanical silicon oscillator
… emerged as front runners for RF front-ends, high frequency filters, and frequency sources in various applications. The prospect of seamless integration with CMOS has provided a significant boost to displace Quartz, which for long has been the go-to option for timing sources. To construct an …
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Modulation transfer function measurements, image quality metrics, and subjective image quality for soft-copy color images
The effect of spatial frequency manipulation of color images and its impact on subjective image quality were examined by measuring subjective image quality and the changes in several prominent image quality metrics. The Modulation Transfer Function Area (M1F A), the Square Root Integral (SQRI), the …
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Three essays on the UK Electricity Market: Risk Premium,Uncertainty of Supply and Forecasting
… well-known trend estimation methods, such as frequency filters, wavelet decomposition, empirical mode decomposition and hodrick–prescott (HP) filter according to the Diebold and Mariano (1995) test.
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High-dimensional Quantum Key Distribution with Frequency Encoding
… quantum key distribtuion (QKD) protocol with frequency-bin encoding using time-energy entangled photon pairs. We used programmable frequency filters to obtain 16 frequency bins for key generation within a 640 GHz flat spectrum in the telecommunication wavelength band. The security of the …
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Simulation and design optimization for linear wave phenomena on metamaterials
… such as waveguides, light bending structures or frequency filters can be modeled through finite periodic structures designed using optimization techniques. Two different kind of problems can be found: those involving linear waves and those involving nonlinear waves. The former have been widely …
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Investigation of stability for composite operational amplifiers
… operational amplifiers to extend the high frequency performance of conventional RC active filters · it became evident that theoretical predictions of stability and experimental results did not agree. Other publications concerned with composite operational amplifiers merely presented …
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Simulation and design optimization of wave propagation in heterogeneous materials
… invisibility cloaks, superlenses or light frequency filters. For acoustic applications one may consider the design of passive noise filters or sound beams. The physics governing the propagation of waves is well understood and the existing mathematical models often provide excellent …
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Stochastic Ground Motion Models for Uncertainty Quantification in Earthquake Engineering
… in MFWNM: the high-pass filter’s corner frequency, which controls the low-frequency content of simulated motions. Additionally, we explore proper MFWNM configurations, including different frequency filters (single- and multi-mode) and trend functions (constant, linear, and non-parametric) …
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Quantum sensing and simulation with solid-state defects
… vector field sensing at nanoscale and arbitrary frequency field sensing. Additionally, a deeper understanding of the rich dynamics associated with the charge degrees of freedom of various defect states in the material host is necessary. This thesis aims to tackle these challenges and contribute …
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Kmitočtové filtry řízené mikroprocesory
Tato diplomová práce je zaměřen na návrh kmitočtového filtru řízeného mikroprocesorem. Obsahem práce je seznámení se základními pojmy a principy kmitočtových filtrů a také s aktivními kmitočtovými filtry pro kaskádní syntézu. Dále práce obsahuje informace o digitálních potenciometrech. V práci jsou …
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Ανάπτυξη νέων δομών φίλτρων στο λογαριθμικό πεδίο με χρήση της κυματικής μεθόδου
Τα φίλτρα λογαριθμικού πεδίου (log-domain filters) είναι μια οικογένεια φίλτρων συνεχούς χρόνου στην οποία γίνεται χρήση της μη-γραμμικής I/V χαρακτηριστικής των ενεργών στοιχείων (BJT τρανζίστορ, MOSFET τρανζίστορ σε ασθενή αναστροφή) για να επιτευχθεί γραμμική συμπεριφορά από είσοδο σε έξοδο. …
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Dvoukanálový devítipásmový ekvalizér
Ciežom bakalárskej práce je zoznámenie sa s úpravou audio signálu s kmitočtovými výhybkami a návrhom deväťpásmového ekvalizéra. Následne po navrhnutí ekvalizéra bolo nutné ho odsimulovať v programe PSpice. V programe Eagle navrhnúť dosku plošného spoja a ekvalizér prakticky realizovať a to vrátane …