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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 12 of 12 for “"Square waves"”.
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Analytical determination of autocorrelation and noise power density spectrum of randomly modulated pulse width square waves
The Wiener theory of the minimum mean square error ·criterion is well furnished by knowing the autocorrelation function of the input to the linear system. This input signal is generally an additive mixture of a piecewise continuous message and a noise. The problem considered in this paper is the …
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Artificial Frequency Match Neuron Implemented with Digital Logic
… output, the proposed neuron converts inputs into square waves of frequencies determined by weights, and the time that the input waves require to produce a certain pattern is used to determine the output. This neuron was tested on a software simulator and successfully implemented on a Field …
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TUNING 2-BY-2 MULTI-LOOP PI CONTROLLERS USING RELAY FEEDBACK
… consists of identical relay outputs which are square waves with precisely one fundamental frequency. The second mode is characterised by relay outputs which are square waves of different fundamental frequencies in each loop. The third mode is one of periodic complex oscillations consisting of …
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Development of 3-phase inverter with PID voltage control
… power electronic circuits. Inverter output is square waves and a filter is needed to change the output to a sinusoidal wave. A control method is implemented in this project to create stable sinusoidal voltage amplitude. The benefit of using control method is the inverter can be adjusted to …
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Net Flow Through Soft Porous Media Generated by a Periodic Mean-Zero Pressure Gradient
… mean-zero pressure gradients are composed of square waves, with a high magnitude positive pressure drop applied for 1/3 of the period and a negative pressure drop with half the magnitude applied for 2/3 of the period. We investigate the effect of varying the pressure magnitude and period. This …
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TOWARDS RELAY FEEDBACK AUTO-TUNING OF MULTI-LOOP SYSTEMS
… consists of identical relay outputs which are square waves with precisely one fundamental frequency. The second mode is characterised by relay outputs which are square waves of different fundamental frequencies in each loop. The third mode is one of periodic complex oscillations consisting of …
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Microfluidic temporal cell stimulation
… from cellular responses to step inputs or slow square waves [1-3]. Generation of arbitrary waveforms in these experiments involved either complex programmable syringe pump systems or physically moving a sample through a spatial gradient to create temporal changes [4, 5]. My device used …
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Dynamically Corrected Quantum Control: A Geometrical Framework
… sequences based on Dirac delta functions or square wave functions, such as Hahn spin echo or CPMG, have been developed to dynamically correcting the noise effects. However, implementing these ideal pulses with high fidelity is a challenging task in real experiments. In this thesis, we provide …
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Measurement and Analysis of Calcium-Dependent Exocytosis in Giant Excised Membrane Patches
… capacitance. The program uses either sine waves or square waves to estimate cell parameters. Phase-sensitive detection is utilized in both cases. For square wave perturbation, either integrated charges or direct current trace is used for calculating cell parameters. Other functions like …
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An SSVEP Brain-Computer Interface: A Machine Learning Approach
… which require stimulations. By comparing square wave, triangle wave and sine wave light signals and their corresponding SSVEP, it was observed that square waves with 50% duty cycle have a significantly higher success rate of eliciting SSVEPs than either sine or triangle stimuli. </p> <p>2. …
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Modulation transfer function measurements, image quality metrics, and subjective image quality for soft-copy color images
… Modulation Transfer Function Area (M1F A), the Square Root Integral (SQRI), the Integrated Contrast Sensitivity (ICS), the Subjective Quality Factor (SQF), and several other acutance-derived image quality metrics were evaluated for their ability to predict image quality. Five distinct spatial …