Thèses sur le sujet « Damage Diagnosi »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les 50 meilleures thèses pour votre recherche sur le sujet « Damage Diagnosi ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Parcourez les thèses sur diverses disciplines et organisez correctement votre bibliographie.
CIVERA, MARCO. « Vibration-based Assessment of Structural Changes in the Linear and Nonlinear Response of Mechanical Structures for Aerospace Applications ». Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2932751.
Texte intégralStubbs, Peter John. « Cardiac Troponin T and myocardial damage ». Thesis, University College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309504.
Texte intégralAhmed, Usman. « Protein damage markers in diagnosis, progression and treatment of arthritis ». Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/58716/.
Texte intégralPeetathawatchai, Chatmongkol. « The applicability of neural network systems for the structural damage diagnosis ». Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40591.
Texte intégralIncludes bibliographical references (leaves 252-266).
by Chatmongkol Peetathawatchai.
Sc.D.
Wang, Kaihong. « Vibration Analysis of Cracked Composite Bending-torsion Beams for Damage Diagnosis ». Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29891.
Texte intégralPh. D.
Gregory, Erin Kathleen Taylor. « Cognitive and Perceptual-Motor Indicators of Lateralized vs. Diffuse Brain Damage in Adults ». Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3287/.
Texte intégralLayton, Donald Charles. « The relationship between Glasgow Coma Scale ratings and the neuropsychological functioning in acutely head injured thirteen through twenty-six year olds ». Virtual Press, 1985. http://liblink.bsu.edu/uhtbin/catkey/442601.
Texte intégralScholtz, Brendon P. « Effects of Cautioning and Education in the Detection of Malingered Mild Traumatic Brain Injury ». Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5247/.
Texte intégralGrimshaw, P. N. « Quantitative assessment of knee instability ». Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234593.
Texte intégralTaylor, Erin Kathleen. « The utility of the McCarron-Dial System in determining location of brain lesion ». Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4570/.
Texte intégralLiu, Chang. « Singular Value Decomposition Applied to Damage Diagnosis for Ultrasonic Guided Wave Structural Health Monitoring ». Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/402.
Texte intégralXiao, Wenchang. « Structural Health Monitoring and Fault Diagnosis based on Artificial Immune System ». Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/169.
Texte intégralCarneiro, Sergio H. S. « Model-Based Vibration Diagnostic of Cracked Beams in the Time Domain ». Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28717.
Texte intégralPh. D.
Wang, Wei Ji. « Gearbox condition monitoring and early damage diagnosis by two and three dimensional vibration signal analysis ». Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334237.
Texte intégralHerrera, Liana J. Marmol. « Artificial intelligence methods for the diagnosis of myocardial damage in Chagas' disease using electrocardiographic signals ». Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314320.
Texte intégralBass, Catherine. « Performance of Children With and Without Traumatic Brain Injury on the Process Scoring System for the Intermediate Category Test ». Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc278018/.
Texte intégralNorton, Carole Lynn. « Assessment of Brain Damage : Discriminant Validity of a Neuropsychological Key Approach with the McCarron-Dial System ». Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc330881/.
Texte intégralCollingwood, Lisa M. (Lisa Marie). « Performance of Psychiatric and Head Injury Patients on the General Neuropsychological Deficit Scales ». Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc278771/.
Texte intégralWinfield, Kaye R. « Extraction of desmosines from urine : an indicator for inflammatory lung damage ». University of Western Australia. School of Paediatrics and Child Health, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0059.
Texte intégralGrub, Anna. « Schadenersatzansprüche bei Geburt eines behinderten Kindes nach fehlerhafter Pränataldiagnostik in der Spätschwangerschaft / ». [S.l. : s.n.], 2006. http://www.gbv.de/dms/ilmenau/toc/512374953.PDF.
Texte intégralColaluca, Beth. « Validation of the Expanded McCarron-Dial System for Diagnosis of Neuropsychological Dysfunction in Adults ». Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc279403/.
Texte intégralPuelz, Michael. « A program to generate and validate new test versions of a neuropsychological planning test ». Virtual Press, 1991. http://liblink.bsu.edu/uhtbin/catkey/834522.
Texte intégralDepartment of Computer Science
Beck, Kelley D. Franks Susan F. « Personality and the prediction of outcome following rehabilitation in persons with acquired brain injuries the Millon Behavioral Medicine Diagnostic (MBMD) / ». [Denton, Tex.] : University of North Texas, 2008. http://digital.library.unt.edu/permalink/meta-dc-9121.
Texte intégralВіхрова, Ірина Олександрівна, Ирина Александровна Вихрова, Iryna Oleksandrivna Vikhrova, Андрій Миколайович Лобода, Андрей Николаевич Лобода et Andrii Mykolaiovych Loboda. « Significance of urinary Aminopeptidase N in early diagnosis of kidney damage in children with type 1 diabetes mellitus ». Thesis, Lithuanian University of Health Sciences, 2021. https://essuir.sumdu.edu.ua/handle/123456789/83663.
Texte intégralЦель. Целью настоящего исследования было изучить особенности уровней Аминопептидазы N (ANPEP) в моче у детей в зависимости от продолжительности диабета. Методы. Мы проанализировали 3 группы детей с сахарным диабетом 1 типа и группу сравнения детей без диабета из Областной детской клинической больницы г. Сумы. ANPEP измеряли с помощью иммуноферментного анализа с использованием набора антител к биомаркерам почек человека (R&D Systems, Миннеаполис, Миннесота, США). Результаты были получены с помощью BioRad ChemiDoc Touch. Массивы анализировали полуколичественно с использованием программного обеспечения BioRad Image Lab. Результаты. В исследование были включены 47 детей с диабетом и 8 детей без диабета. Уровень ANPEP в моче увеличился в 2,6 раза у детей с длительностью диабета менее одного года по сравнению с контрольной группой. Уровни ANPEP были повышены в 3,2 раза у детей с длительностью диабета от одного до пяти лет. У детей с длительностью диабета более 5 лет маркер увеличился в 2,7 раза. Заключение. Повышение уровня ANPEP в моче наблюдалось в первый год диабета у детей. Измерение уровня ANPEP в моче может быть полезно для диагностики диабетической нефропатии.
Aim. The aim of the current study was to investigate the features ANPEP levels in urine of children depending on the duration of diabetes. Methods. We analysed 3 groups of children with type 1 diabetes mellitus and comparison group of children without diabetes from Regional Children’s Clinical Hospital in Sumy. ANPEP was measured by ELISA using a Proteome Profiler Human Kidney Biomarker Antibody Array (R&D Systems, Minneapolis, MN, USA). Results were detected with BioRad ChemiDoc Touch. The arrays were analysed semiquantitatively, using BioRad Image Lab Software. Results. The study included 47 children with diabetes and 8 children without diabetes. The level of ANPEP in urine increased 2.6-fold in children with the duration of diabetes below one year compared to the control group. ANPEP levels were elevated 3.2-fold in children with duration of diabetes from one to five years. In children with duration of diabetes duration, the marker increased 2.7 times. Conclusion. Increase urinary ANPEP was observed in the first year of diabetes in children. Measuring the level of ANPEP in urine may be useful for the diagnosis of diabetic nephropathy.
Mercer, Walt N. (Walt Neilson). « Performance of Brain-Injured versus Non-Brain-Injured Individuals on Three Versions of the Category Test ». Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc278878/.
Texte intégralD'Angelosante, Valentina. « White matter alterations and cognitive assessment in hypertensive patients without damage at conventional neuroimaging ». Doctoral thesis, Università degli studi del Molise, 2019. http://hdl.handle.net/11695/86520.
Texte intégralHypertension is a public health problem affecting one third of world population according to the latest estimation of World Health Organization and these estimates are increasing considering diagnoses in non-industrialized countries. Hypertension has a long pre-symptomatic phase with initial damage of target organs: heart, kidney, vasculature and brain. Hypertension is the major risk factor for acute diseases such as cerebrovascular accidents and for chronic disease such as neurodegenerative pathologies first vascular dementia. An early phase that can likely lead to dementia, called vascular cognitive impairment, has been observed. Hypertension has been found to affect levels of attention and concentration and secondarily memory since early studies. In routinely clinical practice, assessing cognitive functions in hypertension is not usual and when this happens it is because patients or their families report deficits, an already evident phase of cognitive impairment. The objective of this research project was to assess cognition in hypertensive patients who did not report any damages in cortical white matter and to correlate the cognitive assessment with the MRI-DTI fiber tracking parameters, to identify biomarkers that can predict the future structural damage of the cortex. To pursue this goal, subjects admitted at our outpatients’ facility – Regional Excellence Hypertension Center of the Italian Society of Hypertension, affiliated to the Department of Neurological Complications of Cardiovascular Diseases of I.R.C.C.S. Neuromed - were recruited. All patients who did not report previous damage or neurological diseases and who had no cardiovascular problems except for arterial hypertension were included in the study. After collecting the medical history and the informed consent, patients underwent MRI sequences to exclude those with cerebral cortex damages, then they underwent DTI sequences with the related parameters FA, MD, AD and RD. All recruited patients were subjected to the same procedures: blood pressure measurements, blood collection, ultrasonographic analyses for cardiac and vascular imaging, cognitive assessment. These procedures were necessary to include in this study only subjects with no overt signs of end organ damage or dementia. To this aim tests that could fit the need to better assess cognitive functions in the cardiovascular field were selected: first, MoCA battery of test, considered a diagnostic gold standard tool to evaluate cognition in cardiovascular diseases. Along with this battery, each patient underwent a questionnaire for the autonomy in every day activity (IADL), a learning test, a semantic fluency test and the Stroop test. Results in cognitive assessment showed that hypertensive patients perform worse in MoCA test, in anterograde learning test and in Stroop test compared to control group. Moreover, significant alterations in the parameters of associative (SLF), projection (ATR) and callosal (FMI) fibers emerged from the fiber tracking analyses. These alterations are implicated in executive functions, in memory and in processing information speed. Correlation analyses pointed out the relation between MoCA and both SLF and ATR fibers, MoCA and hypertension duration and Stroop test and FMI fibers. Overall, WM fiber-tracking on MRI make it possible to detect an early marker of damage in hypertension, and in perspective this method could be precious to identify new approaches in preventing vascular dementia.
Andersson, Jesper, et Nilsson Maria Hedström. « "Dom kallade mig för Dampe och Erik för Hyper men jag tror inte dom menade något negativt" : En retrospektiv undersökning om unga vuxnas upplevelse av resursskola ». Thesis, Stockholms universitet, Institutionen för socialt arbete - Socialhögskolan, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-139294.
Texte intégralWasielewski, Sean. « Discrimination of brain-damaged, depressed, and normal subjects using the Woodcock-Johnson tests of cognitive ability-revised ». Virtual Press, 1998. http://liblink.bsu.edu/uhtbin/catkey/1117101.
Texte intégralDepartment of Educational Psychology
Скоропад, Ю. І., et Н. Ф. Краткова. « Діагностика заочеревинних гематом у постраждалих з полісистемними пошкодженнями ». Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/32576.
Texte intégralAhmed, Hesham. « Condition Assessment and Analytical Modeling of Alkali-Silica Reaction (ASR) Affected Concrete Columns ». Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42680.
Texte intégralVan, Dyke Jason. « Modeling Behaviour of Damaged Turbine Blades for Engine Health Diagnostics and Prognostics ». Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20312.
Texte intégralSmith, Belinda Andrews. « Voice disorders : a handbook for the voice teacher examining the diagnosis, treatment, and rehabilitation of the damaged singing voice ». The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1241190387.
Texte intégralKraemer, Peter [Verfasser]. « Schadensdiagnoseverfahren für die Zustandsüberwachung von Offshore-Windenergieanlagen. Damage diagnosis approaches for structural health and condition monitoring of offshore wind energy plants / Peter Kraemer ». Siegen : Universitätsbibliothek Siegen, 2011. http://d-nb.info/1017180164/34.
Texte intégralAdams, William P. « Thyroid Hormone as a Method of Reducing Damage to Donor Hearts after Circulatory Arrest ». VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4766.
Texte intégralBehroozinia, Pooya. « Finite Element Analysis of Defects in Cord-Rubber Composites and Hyperelastic Materials ». Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/87703.
Texte intégralPHD
Beck, Kelley D. « Personality and the prediction of outcome following rehabilitation in persons with acquired brain injuries : The Millon Behavioral Medicine Diagnostic (MBMD) ». Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9121/.
Texte intégralFujikake, Tasuku. « Detection of muscle damage by B-mode ultrasonography : relationship between echo intensity and histological changes following injection of bupivacaine to rat hind limb muscles ». Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2008. https://ro.ecu.edu.au/theses/166.
Texte intégralHarmouche, Jinane. « Statistical Incipient Fault Detection and Diagnosis with Kullback-Leibler Divergence : from Theory to Applications ». Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0022/document.
Texte intégralThis phD dissertation deals with the detection and diagnosis of incipient faults in engineering and industrial systems by non-parametric statistical approaches. An incipient fault is supposed to provoke an abnormal change in the measurements of the system variables. However, this change is imperceptible and also unpredictable due to the large signal-to-fault ratio and the low fault-to-noise ratio characterizing the incipient fault. The detection and identification of a global change require a ’global’ approach that takes into account the total faults signature. In this context, the Kullback-Leibler divergence is considered to be a ’global’ fault indicator, which is recommended sensitive to abnormal small variations hidden in noise. A ’global’ spectral analysis approach is also proposed for the diagnosis of faults with a frequency signature. The ’global’ statistical approach is proved on two application studies. The first one concerns the detection and characterization of minor cracks in conductive structures. The second application concerns the diagnosis of bearing faults in electrical rotating machines. In addition, the fault estimation problem is addressed in this work. A theoretical study is conducted to obtain an analytical model of the KL divergence, from which an estimate of the amplitude of the incipient fault is derived
Liu, Zicheng. « Electromagnetic modeling and imaging of damages of fiber-reinforced composite laminates ». Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS332.
Texte intégralMy PhD work is about electromagnetic modeling and imaging of disorganized periodic structures. A certain pattern in an elementary subdivision (a “cell”) is repeated in the other cells of the structure into certain directions of space. This repetition is disorganized by a change of material properties and/or geometries of the constitutive parts, within one or more cells. At first level of modeling, these panels are a succession of planar plates one over the other. Each consists of a regular linear arrangement of long cylinders with same finite circular sections, all orientated into the same direction: we call them “fibers”, each cylinder resulting from the assumption of a bundle of small-size fibers. The constitutive material of the fibers differs from the embedding material (matrix) that they reinforce. Each plate is made of fibers with different axes for sturdiness. There are few or many plates, with repetition of a small stack of plates. For conductive panels (carbon-based), imaging is MHz; for lossless or weakly lossy panels (glass based), imaging is microwave (a few tens GHz, possibly more). There might be missing/displaced cylinders inside a plate, with consequent changes in possibly several cells, adjacent or not. Local damages might occur also, leading to changes in shape or electromagnetic properties of one or more cylinders in one or more cells in one or more plates. Randomness in distribution of the inclusions might account for uncertainties of positioning with respect to assumed geometries. Properly illuminating the structures and collecting the resulting fields (in the near-field hopefully, possibly in the far-field) should allow their imaging and concur to their diagnostics. So, a periodic structure under interrogation is disorganized. One wishes to successfully image the structure while taking care at best of prior information on periodicity and disorganization, on sensing systems, and obviously of needs and limitations of the testing. The PhD benefits from a grant from the Chinese Scholarship Council
Duchene, Pierre. « Caractérisation non destructive des matériaux composites en fatigue : diagnostic de l’état de santé et pronostic de la durée de vie résiduelle par réseaux de neurones ». Thesis, Ecole nationale supérieure Mines-Télécom Lille Douai, 2018. http://www.theses.fr/2018MTLD0008.
Texte intégralThis research work consists in a new approach for non-destructive characterisation of damage in composite materials (carbon/epoxy) subjected to fatigue during self-heating tests (increasing load blocks). This approach is based on the use of several non-destructive techniques applied in-situ, in real time or delayed, whose analysis is either redundant or complementary. Six techniques were used (acoustic emission, infrared thermography, digital image correlation, acousto-ultrasound, C-scan ultrasound and lamb waves) and their post-processed results were merged using algorithms based on neural networks. The results obtained made it possible to assess and locate the damage of the material and to estimate its residual life. In doing so, several scientific advances have been obtained by, for example, carrying out a 2D localization of acoustic events using only two sensors with millimetric precision, or the development of a new pictorial acousto-ultrasonic technique allowing an control of the state of material damage at free stress conditions, ... and finally, the prognosis of the residual lifetime of the material based on a data fusion by neural networks
Kanaan, Mouayad. « Les quartiers non-réglementaires de l'agglomération de Damas : entre les projets urbains et les initiatives des habitants ». Thesis, Lyon 3, 2014. http://www.theses.fr/2014LYO30065.
Texte intégralThis dissertation is mainly based on our critical analysis of studies and projects by different consultants (Syrian, European, international) and on our fieldwork in Damascus, capital of Syria. In 2004, nearly 40 % of the population in the urban district of Damascus lived in informal settlements. Therefore, these settlements represent an essential component of urban expansion. Firstly, the dissertation analyzes the phenomenon of informal habitat in Damascus. It explains the land market and the characteristics of illegal settlements in three case studies, two neighborhoods: Assad Al Din and Daf Al Chok and a village: Al Bahdalya. It also shows how the builder performs the different phases of construction. Secondly, the thesis deals with urban policy. It presents the consultants: MAM, Cities Alliance, Al Diwan, who have undertaken studies and projects for the areas mentioned above. Here, the dissertation examines their studies and projects to provide critical, in depth analysis. Thirdly, the dissertation deals with the urban policy as perceived by the citizens. It studies socioeconomic characteristics of the interviewed inhabitants in the areas studied here, residential mobility and their attitudes towards projects and studies proposed to them. Some of interviewed household’s heads think they will be given a house, but many think they will be evicted. That is why the dissertation finally addresses the issue of relocation which is based on our fieldwork in the re-housing suburb of Al Hussainyah
Sentosa, Bastian Okto Bangkit. « Assessing the structural elements of reinforced concrete buildings by using dynamic measurements ». Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAA008/document.
Texte intégralThere are many of the examples of dynamics measurements applications in the existing building: verification of structural seismic vulnerability, which was constructed before the earthquake building code; auscultation of structural capacity in post-earthquake situation or after modification in surround environment (Excavation of tunnel or demolition the neighbour buildings for example). Currently, this measurement type enables the diagnosis a structure in global scale (a whole structure) while identification and localization of damage in local scale (each elements of the structure) remains to be explored. In this dissertation, diagnosis in locale scale will be studied. This study is significant for its contribution to the national reassessment of existing structures where there is the large number of buildings to be rehabilitated
Kodjo, Apedovi. « Contribution à la caractérisation des bétons endommagés par des méthodes de l'acoustique non linéaire. Application à la réaction alcalis-silice ». Thèse, Université de Sherbrooke, 2008. http://savoirs.usherbrooke.ca/handle/11143/1839.
Texte intégralАрхипов, О. Г., О. Г. Боярчук et Д. О. Ковальов. « Розробка приладу на основі імпульсного методу контролю корозійно-механічних пошкоджень обладнання ». Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/27705.
Texte intégralDornic, Nausicaa. « Élaboration et comparaison de deux modèles de durée de vie des fils d’interconnexion des modules de puissance, l’un basé sur les déformations et l’autre sur les dégradations ». Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN043/document.
Texte intégralThe domain of power electronics reliability has become an important center of interest with the recent massive system electrification. The manufacturers are more and more confronted to the necessity of producing reliable devices with optimized maintenance. Electronics components, such as IGBTs, diodes and MOSFETs assembled in power modules, are at the center of the systems conversion, and as a consequence, are subjected to high environmental and functional stresses (ambient temperature, vibrations…). All these factors have a strong impact on the components lifetime and thus on the devices reliability. Economically, scheduling a maintenance with a system replacement is less detrimental than a brutal failure of the system. As a consequence, the use of lifetime prognostic tools is necessary. The problematic consists in the health state prediction of power modules in functioning to be able to schedule a maintenance before the failure of the equipment.To be able to determine the remaining useful lifetime of power modules in functioning, lifetime models are used. These models can either be empirical, physical or statistical. The empirical models are the most common ones, because of their easy establishment and implementation. They are based on results from accelerated power cycling tests, which reproduce the stresses endured by the power modules in severe conditions. An extrapolation is then needed to obtain the power module health state in normal functioning conditions. The main drawback of these models is the lack of description of the physical mechanisms leading to damage, resulting potentially in errors in particular during extrapolation. That’s the reason why physical models start to draw more attention.In the thesis, two physical lifetime models of IGBT power modules are proposed. The first approach is based on deformation induced inside the device assembly in operation. The degradation is in this case described by the quantification of deformation related to thermal stresses. In the second approach, the lifetime model is based directly on damage through the establishment of a degradation model. These two lifetime models are finally compared to show the benefits and disadvantages of each. More generally, the establishment and comparison of these models is part of an approach to develop diagnostic tools so that the remaining useful lifetime of power modules can be predicted in operation
Gousseau, William. « Pronostic de dégradation d'endommagements de roulements sur application aéronautique par analyse vibratoire ». Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI063.
Texte intégralAs part of preventive maintenance of its engines, Safran Aircraft Engines wishes to complete its diagnostic operations with a reliable prognosis of the residual life of the bearings. Following an attack, there is currently a great deal of uncertainty about the remaining life before bearing failure from the threshold of vibrational observability of the damage. Current algorithms diagnose an approximate stage of degradation and generate alarm messages of different levels, each level corresponding to a different stage of degradation, combining confidence and severity of diagnosis. An important aspect of the prognosis is the taking into account of the contextual parameters influencing the rate of degradation. The objectives of this thesis are to have methods and tools to quantify a running time remaining before bearing failure with regard to: - the severity of the damage detected, - the environmental conditions of operation, - the depth The industrial constraints associated with these objectives are as follows: 1) The prognosis should be based, at least, on high-frequency vibratory measurements of a few kHz (accelerometers), contextual data (the rotational speeds of the different rotors, for example, or the amplitudes of the levels piloted on them), rotation regimes, revealing a loading of the bearings) 2). Constituing a database of tests resulting from a plan of experiments: these tests will have to take into account the constraints related to the control of the parameters considered to be significantly influential 3) This database must take into account the representativity of the vibratory environment of an aircraft engine. 4) Propose a tool or method of prognosis taking into account the nature of the bearing to consider
DAGA, ALESSANDRO PAOLO. « Vibration Monitoring : Gearbox identification and faults detection ». Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2763473.
Texte intégralSampson, Dayle Lorand. « Urinary biomolecular indicators of exercise-induced over exertion injury ». Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/62158/1/Dayle_Sampson_Thesis.pdf.
Texte intégralEl, Bizri Rana. « Characterization of Pten and Trp53 deficient prostatic tumors in mice ». Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ097.
Texte intégralProstate cancer (PCa) is a leading cause of male cancer death worldwide. While most locally PCa are curable, metastatic tumors initially respond to androgen deprivation therapy but ultimately relapse to castration-resistant prostate cancer (CRPC), which is a lethal disease. Since the tumor suppressor genes PTEN and p53 are frequently mutated in metastatic and CRPC, the host laboratory generated mouse models in which Pten and/or Trp53 are selectively ablated in adult prostatic epithelial cells (PECs) in order to unravel the key events leading to prostate cancer progression. Our study reveals that Pten ablation stimulates PECs proliferation forming prostatic intraepithelial neoplasia (PIN) within a few months. This hyper-proliferation induces replicative stress and a DNA damage response (DDR), which in turn leads to a progressive growth arrest with characteristics of cell senescence. As senescent cells secrete a large number of cytokines and chemokines, and can accumulate other mutations, they might contribute to tumor progression. Importantly, in the absence of Trp53, most Pten-null PECs develop PINs that enter senescence. However partial loss of PECs identity is detected as we show enhanced stemness and focal neuroendocrine differentiation of luminal Pten-null PECs. In some cases, adenocarcinoma and sarcomatoid tumors are formed, and more than one-third of the latter develop metastases. Strikingly, we also show formation of a castrate-resistant cell entity of both Pten and Pten/Trp53-null PECs sharing luminal and basal markers. Taken together, as current treaments lead to side effects and resistance, the development of therapeutic strategies to eliminate senescent cells/and or PECs expressing luminal and basal/stem progenitor in pre- cancerous lesions represents promising option for prostate cancer treatment
Chang, Lu-Chen, et 張育誠. « Damage Diagnosis of Brushless DC Motors ». Thesis, 2014. http://ndltd.ncl.edu.tw/handle/67768970046226817838.
Texte intégral中原大學
電機工程研究所
102
Due to the worse air pollution and the use-cost raising of fuel vehicles, the vehicles manufacturers focus the research and development of electric vehicles (EV). This thesis is using analyzing motor current signal as a research to diagnosis the motor bearing and the winding faults to prevent or reduce the motor fault probability of EV. In the thesis, an automatic diagnosis system for a brushless DC motor (BLDC) fault is established. First, considering different motor damage kinds, as bearings and windings, the system measured the motor current signal in normal and fault operating. Then, three signal processing methods, as the wavelet multi-resolution analysis (MRA), the intrinsic mode function (IMF) and the Hilbert-Huang transform (HHT), were used to analyze the motor current signal. Besides, artificial intelligent algorithms, as back-propagation neural network (BPNN) and K-nearest neighbor (KNN), were used to identify motor current signals. Second, an algorithm method combine the K-means clustering algorithm with the artificial bee colony algorithm (ABC) was proposed to select best feature by calculating the correlation between features and data. So that, a example using UCI database to verify feature selection method would be reduce the dimension of features. Finally, a noise test was added to obtain the noise resistance of the classification system. As results, the motor current signal using HHT would correctly identify various motor fault kinds. Otherwise, it would improve the accuracy drop problem of the classification system by feature selection strategy in the noise environment. Summary, the use of HHT for motor faults had better performance and the proposed feature selection method increased the noise tolerance of the classification system.