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Dissertations / Theses on the topic 'Steady State Frequency'

Author: Grafiati

Published: 5 October 2024

Last updated: 31 July 2025

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1

Lee, Chong Kyong 1973. "Continuation methods for steady state analysis of oscillators." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99777.

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Oscillator circuits are an integral component of wireless communications systems and are increasingly in demand. As such systems gain widespread use, price becomes a very important factor in the design process, and the design cycle must be optimized. This puts an increasing emphasis on the proficiency of oscillator design automation tools. At the same time, as the performance requirements of such systems are becoming more stringent, the required simulation complexity is also increasing. More specifically, high frequency selectivity and low phase noise require very high quality factor oscillato

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2

Unosson, Måns. "A Mixed Frequency Steady-State Bayesian Vector Autoregression: Forecasting the Macroeconomy." Thesis, Uppsala universitet, Statistiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-297406.

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This thesis suggests a Bayesian vector autoregressive (VAR) model which allows for explicit parametrization of the unconditional mean for data measured at different frequencies, without the need to aggregate data to the lowest common frequency. Using a normal prior for the steady-state and a normal-inverse Wishart prior for the dynamics and error covariance, a Gibbs sampler is proposed to sample the posterior distribution. A forecast study is performed using monthly and quarterly data for the US macroeconomy between 1964 and 2008. The proposed model is compared to a steady-state Bayesian VAR m

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3

Arjona, Lopez Marco Antonio. "Steady state and frequency domain lumped model numerical characterisation of solid rotor synchronous generators." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/7548.

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4

Cheng, Jung-hui 1960. "Steady-state and dynamic analysis of high-order resonant converters for high-frequency applications." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282337.

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Practical steady-state and dynamic design and analysis for high-order dc/dc resonant converters is presented. The analysis is mainly based on two types of the resonant converters, parallel-type and Class-D (a series-type), which are suitable for high-frequency applications. In the analysis of parallel resonant converters, the key step in the derivation of steady-state analytic equations for LLC-type parallel (LLC-PRC) and LLCC-type series-parallel resonant converter (LLCC-SPRC) is to reduce the order of their state-space models. In particular, the analytic equations for LLCC-SPRC can also be u

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5

Brennan, SiobhaÌn Katharine. "Effect of varying the amplitude and frequency modulation phase relationship on steady state evoked potentials." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398681.

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6

Ballukja, Erjon. "Power Quality Analysis in DC/DC Converters under Steady State and Transient Conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The modern electric power systems are going through significant changes because of continuous increasing demand of electric power. Further, a growing number of renewable energy systems that directly deliver DC power jointly considered with the advance in DC technology allows a more efficient and affordable use of energy. Furthermore, a rising use of DC systems and microgrids in a wide number of applications has motivated the study of Power Quality (PQ). The concept of power quality in DC systems and microgrids brings many challenges and the aim of this thesis is to understand the delivered pow

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7

Schenk, Eric R. "Detection of specific steady-state visual evoked potentials when multiple frequencies are available for simulation." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176401258.

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8

Slawig, Anne [Verfasser], and Herbert [Gutachter] Köstler. "Reconstruction methods for the frequency-modulated balanced steady-state free precession MRI-sequence / Anne Slawig ; Gutachter: Herbert Köstler." Würzburg : Universität Würzburg, 2018. http://d-nb.info/1161344284/34.

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9

Markessis, Emily. "Development of an objective procedure allowing frequency selectivity measurements using the masking function of auditory steady state evoked potentials." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209990.

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<u><b>Introduction</u></b><p><p align = "justify">Les surdités cochléaires induisent, outre une audibilité réduite, une série de distorsions de la représentation neurale des sons. Deux des mécanismes à la base de ces distorsions sont d’une part une atteinte de la sélectivité fréquentielle et d’autre part des zones neuro-épithéliales non fonctionnelles. Tant le premier que le second mécanisme apparaissent dans une proportion variable et non prédictible d’un sujet à un autre. Deux tests permettent le diagnostic de ces atteintes spécifiques: la Courbe d’Accord (Tuning Curve: TC) et le Threshold E

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10

Smith, Norman Alan. "The steady-state and post-ignition transient luminous behaviour of the tubular fluorescent lamp operating throughout the dimmed mode range using high frequency dimming." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387764.

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11

Tagliati, Stella. "Membrane-based nanocalorimetry for low temperature studies with high resolution and absolute accuracy." Doctoral thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-64523.

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A differential, membrane-based nanocalorimeter has been designed and constructed for thermal studies of mesoscopic samples at low temperatures. The calorimeter is intended for sample masses from mg to sub-μg and a broad temperature range from above room temperature down to the sub-K region. It allows concurrent use of ac steady state and relaxation methods. Effort was spent to achieve good absolute accuracy to enable investigations of the electronic contribution to the heat capacity of superconductors. The calorimeter consists of a pair of cells, each of which is a stack of heaters and thermom

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12

Pereira, Lucas de Araújo. "Intégration microélectronique de convertisseurs DC/DC piézoélectriques." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALY023.

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L'électronique de puissance vise à conditionner et contrôler l'énergie d'une source vers une charge. Les convertisseurs de puissance, tels que les convertisseurs DC-DC, génèrent une tension de sortie stable à partir d'une tension d'entrée non stable. Dans la quête de miniaturisation et d'augmentation de la densité de puissance, l'utilisation d'un élément piézoélectrique pour le stockage d'énergie mécanique offre des perspectives prometteuses, notamment à des fréquences de l'ordre du MHz.La thèse vise à contribuer au domaine des convertisseurs DC-DC utilisant des résonateurs piézoélectriques po

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13

La, Gatta Paula Oliveira. "Um novo modelo para representação da regulação primária e secundária de frequência no problema de fluxo de potência e fluxo de potência ótimo." Universidade Federal de Juiz de Fora, 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/1937.

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14

Karthik, G. "Investigations Of Spin-Dynamics And Steady-States Under Coherent And Relaxation Processes In Nuclear Magnetic Resonance Spectroscopy." Thesis, Indian Institute of Science, 2001. https://etd.iisc.ac.in/handle/2005/259.

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The existence of bulk magnetism in matter can be attributed to the magnetic properties of the sub-atomic particles that constitute the former. The fact that the origin of these microscopic magnetic moments cannot be related to the existence of microscopic currents became apparent when this assumption predicted completely featureless bulk magnetic properties in contradiction to the observation of various bulk magnetic properties [1]. This microscopic magnetic moment, independent of other motions, hints at the existence of a hitherto unknown degree of freedom that a particle can possess. This pr

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15

Karthik, G. "Investigations Of Spin-Dynamics And Steady-States Under Coherent And Relaxation Processes In Nuclear Magnetic Resonance Spectroscopy." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/259.

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The existence of bulk magnetism in matter can be attributed to the magnetic properties of the sub-atomic particles that constitute the former. The fact that the origin of these microscopic magnetic moments cannot be related to the existence of microscopic currents became apparent when this assumption predicted completely featureless bulk magnetic properties in contradiction to the observation of various bulk magnetic properties [1]. This microscopic magnetic moment, independent of other motions, hints at the existence of a hitherto unknown degree of freedom that a particle can possess. This pr

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16

Mingardi, Damiano. "Analysis, design and test of high efficiency electrical machines with a rotor winding." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422394.

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This thesis deals with the analysis, design and test of three-phase high efficiency electrical motors, with particular reference to motors with a rotor winding. At first, the background and the motivations of this work are described. The bibliography on the subjects is deeply examined and a selection of the most relevant papers can be found in the reference. In this scenario, the main objective of this thesis are illustrated. The Line-Start (LS) Synchronous Machine (SyM) design is a subject under investigation since the beginning of the last century, when solid state power converters was not

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17

Hu, Yutao. "Steady-state analysis techniques for coupled device and circuit simulation." Thesis, 2004. http://hdl.handle.net/1957/29869.

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The focus of this work is on the steady-state analysis of RE circuits using a coupled device and circuit simulator. Efficient coupling algorithms for both the time-domain shooting method and the frequency-domain harmonic balance method have been developed. A modified Newton shooting method considerably improves the efficiency and reliability of the time-domain analysis. Three different implementation approaches of the harmonic balance method for coupled device and circuit simulation are investigated and implemented. These include the quasi-static, non-quasi-static, and modified-Volterra-series

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18

Liu, Yu-ju, and 劉郁汝. "Research on Dual-Frequency Steady-State Visual Evoked Potentials Induced System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/70897670783885263769.

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博士<br>國立中央大學<br>電機工程學系<br>101<br>This dissertation presents a new steady-state visual evoked potential (SSVEP). Different from the general SSVEP using only one frequency flicker for each selection of flash stimulators, this work uses a dual-frequency flicker. This dissertation verifies the feasibility of the proposed method, and the symmetric harmonic phenomena are found in this study. Then this dissertation proposes a novel correlation method for frequency recognition of dual-frequency SSVEP. The results further demonstrate that the proposed correlation method has a higher recognition rate th

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19

Chang, Yu-Chen, and 張育禎. "Steady-State Visual Evoked Potential Stimuli Using High-Frequency Polychromatic Synthesized Sequences." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/n4336g.

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20

Slawig, Anne. "Reconstruction methods for the frequency-modulated balanced steady-state free precession MRI-sequence." Doctoral thesis, 2018. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-162871.

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This work considered the frequency-modulated balanced steady-state free precession (fm-bSSFP) sequence as a tool to provide banding free bSSFP MR images. The sequence was implemented and successfully applied to suppress bandings in various in vitro and in vivo examples. In combination with a radial trajectory it is a promising alternative for standard bSSFP applications. First, two specialized applications were shown to establish the benefits of the acquisition strategy in itself. In real time cardiac imaging, it was shown that the continuous shift in frequency causes a movement of the banding

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21

Kommanapalli, Deepika, I. J. Murray, Jan Kremers, Neil R. A. Parry, and Declan J. McKeefry. "Temporal characteristics of L and M-cone isolating steady-state ERGs." 2014. http://hdl.handle.net/10454/10203.

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no<br>Cone isolating stimuli were used to assess the temporal frequency response characteristics of L- and M-cone electroretinograms (ERGs) in nine trichromatic and four dichromatic human observers. The stimuli comprised sinusoidal temporal modulations varying from 5 to 100 Hz. ERGs were recorded using corneal fiber electrodes and subjected to fast Fourier transform analysis. At low temporal frequencies (<10 Hz<10 Hz) the L- and M-cone ERGs had similar amplitude and exhibited minimal differences in apparent latency. At higher flicker rates (>20 Hz>20 Hz) L-cone ERGs had greater amplitudes

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22

Armstron, Maxine T. "Frequency-channel interactions of the auditory steady-state responses at different levels of the auditory pathways." Thesis, 2006. http://hdl.handle.net/2429/17850.

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This study evaluated the effect of 3 different modulation rates and 3 different rate separations on the interactions (response amplitudes) of multiple ASSRs. Responses from 12 normal-hearing subjects were examined using three amplitude-modulation rates (14,40 and 80 Hz) and four conditions: one tone (1000 Hz), two tones (1000 and 2000 Hz, presented monotically or dichotically) and four tones (500, 1000,2000 and 4000 Hz, presented monotically). Within the multiple-tone conditions, rate separation between the amplitudemodulated tones was varied from 2 to 6 Hz. A 1000-Hz tone served as the baseli

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23

Tu, Kuan-Chung, and 杜貫仲. "High-Frequency Steady-State Visual Evoked Potentials from the Foveal and Extrafoveal Regions of Human Retina." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/51077796994713969738.

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碩士<br>國立交通大學<br>生醫工程研究所<br>100<br>To understanding the brain functions via the brain-computer interface (BCI), here, we studied the steady-state visual evoked potentials (SSVEP) from retinal fovea and extrafoveal in response to a 2牵 circular and a 16牵–18牵 annular white light stimuli flickering between 5 and 65 Hz by 5 Hz increments. Eight subjects (age 20~55 years old) participated in this experiment. Their EEG signals were recorded using a commercial 64-channel NeuroScan system. Their flickering perception and comfort levels were also studied. Spectral and canonical correlation analyses of SS

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24

Shang-PinYeh and 葉上賓. "Measuring the Optical Properties of Superficial Turbid Sample Using the Steady State Frequency Domain Photon Migration System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/68135953063422377774.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>100<br>In this thesis, we demonstrate the use of optical method, steady state frequency domain photon migration system (SSFDPM), to determine physiological parameters of biological tissues. It uses near-infrared light (from 600 to 1100 nm) coupled with mathematical photon transport models to accurately determine optical absorption (µa) and reduced scattering (µs′) properties of tissues. Absorption coefficient (µa) and reduced scattering coefficient (µs′) can be used to determine the chromophore concentrations, such as oxygenated hemoglobin, deoxygenated hemoglobin,

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25

Bosman, Riette. "Threshold estimation in normal and impaired ears using Auditory Steady State Responses." Diss., 2003. http://hdl.handle.net/2263/29091.

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The Auditory Steady State Response (ASSR) procedure has been established as a frequency specific, objective audiologic measure, which can provide reliable thresholds to within 10 dB of the behavioral thresholds. In order for ASSR to find its place in the existing framework of audiometric procedures, the full potential of the procedure needs to be explored. The aim of this study was to determine the accuracy of monotic ASSR in estimating hearing thresholds in a group of 15 normal hearing subjects and 15 hearing-impaired subjects. A comparative research design was implemented. Indicating that re

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26

Hsu, Hung-Hsiao, and 許宏孝. "Three-Dimensional Steady-State Thermal Analyses of a High Voltage and High Frequency Transformer Using Finite Element Method." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/52781560764252187846.

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碩士<br>逢甲大學<br>電機工程所<br>92<br>To design a reliable and economical high voltage and high frequency transformer, it is necessary to be able to predict accurately the temperature distribution within the transformer. For thermal analysis, this thesis presents a model for the transformer. Then, the three-dimensional finite element method is conducted to analyze. Due to the complicated physical geometry of the transformer, such as the anisotropic nature of the iron, low and high voltage windings, insulation layers and insulation oil, a two-dimensional thermal model can not describe the problem accura

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27

Hsu, Ruey-Fen, and 許睿芬. "Prediction of Audiometric Thresholds Using Dichotic Multiple-Frequency Auditory Steady-State Responses in Noise-Exposure and Non-Exposure Hearing Impaired Subjects." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/36532121248741197553.

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碩士<br>高雄醫學大學<br>職業安全衛生研究所<br>96<br>Objective: This study evaluated the usefulness of dichotic multiple-frequency auditory steady-state response (Mf-ASSR) to predict hearing threshold and audiogram of noise-induced hearing impaired in noise exposure workers. To evaluate the accuracy, using statistical methods, of the prediction of Mf-ASSRs in a large sample of sensorineural hearing impairment subjects with and without noise exposure. Design: The Mf-ASSR was recorded in a sample of 34 noise-induced hearing impairment workers (NIHL) and 36 non-noise-exposure hearing impaired subjects. Simultaneou

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28

Sie, Jyun-jie, and 謝竣傑. "Implementation of a high-performance steady-state visual evoked potential (SSVEP)-based brain computer interface using frequency and phase encoded flash lights." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/35804818538671355209.

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碩士<br>國立中央大學<br>電機工程研究所<br>95<br>The present study proposes a new visual evoked potential (VEP)-based brain computer interface (BCI). Users gaze at different spatially separated flash channels (FCs) in order to induce visual evoked signals that have temporal sequences corresponding to the gazed FCs, so that the gazed FC can be recognized and the command mapping to the gazed FC can be sent out to achieve control purposes. To achieve distinct flickering sequences among different FCs, we utilized different frequencies and phases to encode the flashing sequences of different FCs. The proposed syst

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29

Swanepoel, De Wet. "Estimating pure tone behavioural thresholds with the dichotic multiple frequency auditory steady state response compared to an auditory brainstem reponse protocol in normal hearing adults." Diss., 2002. http://hdl.handle.net/2263/30001.

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Audiologists are reliant on objective audiometric procedures to predict auditory sensitivity in difficult-to-test populations. A technique to estimate frequency-specific hearing thresholds in a time-efficient way for difficult-to-test populations, who are unable to provide behavioural responses, has long been the hope of audiologists. The auditory brainstem response (ABR) has dominated the field of objective electrophysiological audiometry for the past three decades. Although it provides a useful method of estimating auditory sensitivity, it presents with its own set of limitations. Recently t

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30

Stroebel, Deidre. "The clinical value of the auditory steady state response for early diagnosis and amplification for infants (0-8 months) with hearing loss." Diss., 2006. http://hdl.handle.net/2263/23362.

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There has always been a need for objective tests that assess auditory function in infants, young children, and/or any patient whose development level precludes the use of behavioral audiometric techniques. Although the Auditory Brainstem Response (ABR) is seen as the ‘gold standard’ in the field of objective audiometry, it presents with its own set of limitations. The Auditory Steady State Response (ASSR) has gained considerable attention and is seen as a promising addition to the AEP ‘family’ to address some of the limitations of the ABR. The ASSR promises to estimate all categories of hearin

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