Дисертації з теми "Additional Au layer"
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Xie, Fei. "A novel clear foil cushion construction incorporating an additional water layer." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/13206/.
Повний текст джерелаSouriau, Jean-Charles. "Recherche d'un matériau laser monocristallin susceptible de présenter une émission stimulée vers 1550 ou 2000 nm à température ambiante." Grenoble 1, 1993. http://www.theses.fr/1993GRE10198.
Повний текст джерелаSashkova, Y. V., and E. N. Odarenko. "The Effect of Additional Layers Parameters on the Modifided Bragg Waveguide Characteristics." Thesis, IEEE, 2017. https://openarchive.nure.ua/handle/document/18112.
Повний текст джерелаMagne, Sylvain. "Etat de l'art des lasers à fibre : étude d'un laser à fibre dopée ytterbium et spectroscopie laser de fibres dopées." Saint-Etienne, 1993. http://www.theses.fr/1993STET4027.
Повний текст джерелаВербицька, Марина Юріївна. "Фазовий склад, структура і магнітні властивості нанорозмірних плівкових композицій FePt з додатковими шарами Au". Thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/30099.
Повний текст джерелаThe work is devoted to definition of the phase composition formation regularities, structure and magnetic properties in nanoscale Fe50Pt50-Au films and multilayered [Pt/Fe]n (n = 1, 4, 8) compositions on SiO2(100 nm)/Si(001) and Al2O3 (1010) substrates at thermal annealings. It is established that by supervising of mechanical stresses level and their sign in Fe50Pt50 layer by change of a thickness, location, quantity of additional Au layers and annealing conditions (temperature, duration, speed of heating and atmosphere vacuum, nitrogen, hydrogen) one can operate by ordering processes and phase compound formation, structure and magnetic properties of film compositions The variations in residual stresses/strains level and sign in the FePt layer of as-deposited films influense the change in the ordered L10-FePt phase formation temperature, structure and the coercivity in the film compositions. Increasing the level of compressive stresses in the Fe50Pt50 layer causes a decrease in the ordering temperature and improvement of the magnetic properties. It is established that oriented grain growth with c-axis of easy magnetization in the [001] direction perpendicular to the film plane at annealing in vacuum occurs in films with a smaller thickness of the intermediate Au(7.5 nm) layer due to the higher level of compressive strains in the deposited films. Increasing the thickness of the Au layer to 15 nm and reducing the level of compressive deformations contributes to the growth of FePt grains with the c-axis of easy magnetization in the plane of the film. The same orientation can be achieved by increasing the thickness of the intermediate Au layer to 30 nm. 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Thus the c-axis of easy magnetization in L10-FePt phasephasephase phase grains is located in the film plane. Hydrogen treatment allows to obtain higher values of coercivity (27.3 kOe) in Fe50Pt50/Au/Fe50Pt50 film compositions at a lower annealing temperature of 700 °C than at annealing in vacuum (900 °C), due to the intensive penetration of hydrogen atoms into the film. It was determined that due to the action of the compressive stress during the diffusion of gold along the grain boundaries and the increase in the number of interfaces in films with an intermediate Au(7.5 nm) layer, the ordered L10-FePt phase formation temperature the can be reduced compared to the other Au layer location. In the films with various Au layer location (top, intermediate, under-) separated from the substrate, the same tendency of the A1→ L10 phase transformation temperature changing as in the films on the substrate is remained: the ordering temperature is lower in film with intermediate Au(7.5 nm) layer then in Au/FeAu/FeAu/FeAu/Fe 50 Pt 50 and and and and Fe 50 Pt 50 /Au filmsfilmsfilmsfilmsfilms. In this work it is also shown that the increase in the number of interfaces in [Pt/Fe]n film compositions, where n = 1, 4, 8, while maintaining the total film thickness, promotes the activation in diffusion processes and the formation of the disordered phase A1-FePt in the composition [Pt/Fe]4 and partially ordered regions with tetragonal distortions in the [Pt/Fe]8 composition already during deposition. Rapid thermal annealing of [Pt/Fe]n film compositions (where n = 4, 8) on SiO2(100 nm)/Si(001) substrates in nitrogen atmosphere leads to the oriented growth of L10-FePt phase grains with a c-axis of easy magnetization, located in [001] direction, perpendicular to film plane. The recommendations for controlling the stress state, the reduction of the temperature of the ordered L10-FePt phase formation, the obtaining of c-axis of easy magnetization oriented perpendicular or parallel to the film plane in the film based on FePt, application of which by thermal activated method will allow to increase the magnetic recording density and storage information were developed
Диссертационная работа посвящена определению закономерностей формирования фазового состава, структуры и магнитных свойств в наноразмерных пленках Fe50Pt50-Au и многослойных композициях [Pt/Fe]n (n = 1, 4, 8) на подложках SiO2(100 нм)/Si(001) и Al2O3 при термических отжигах. Установлено, что контролируя уровень механических напряжений и их знак в слое Fe50Pt50 изменением толщины, расположения, количества дополнительных слоев Au, скорости нагрева и атмосферы при отжиге можно управлять процесами упорядочения и формированием фазового состава, структуры и магнитными свойствами в пленочных композициях. Применение водородной термообработки ускоряет процессы упорядочения в пленках Fe50Pt50/Au/Fe50Pt50, по сравнению с отжигом в вакууме, за счет создания дополнительных сжимающих напряжений при внедрении атомов водовода в пустоты кристаллической решетки фазы L10-FePt. При этом ось легкого намагничиваня c в зернах фази L10-FePt располагается в плоскости пленки. Быстрый термический отжиг пленочных композиций [Pt/Fe]n (где n=4, 8) на подложках SiO2(100 нм)/Si(001) в атмосфере азота приводит к ориентированному росту зерен фазы L10-FePt с осью легкого намагничивания c, расположенной в направлении [001], перпендикулярном плоскости пленки.
Kinkade, Brittany Reanne. "Addition of a Stanton Gauge to the Boundary Layer Data System." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1260.
Повний текст джерелаPrasad, Himani Siva. "Phenomena in material addition to laser generated melt pools." Licentiate thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73754.
Повний текст джерелаMulder-Van, Staden Sune. "Diode laser as an additional therapeutic measure in reducing red complex bacteria in chronic periodontitis." University of the Western Cape, 2016. http://hdl.handle.net/11394/5609.
Повний текст джерелаThis mini-thesis assessed whether a diode laser with a wavelength of 810 ± 10nm can be utilized as an adjunct to conventional management (i.e. scaling, root planing and polishing) of chronic periodontitis during initial phase therapy. Ethical approval and study registration (Reg no: 14/9/6) was finalized prior to commencement of the study. A split mouth randomised control trial was performed on 25 participants (who presented at the Oral Medicine and Periodontology Department of the University of the Western Cape) diagnosed with active, chronic periodontitis. In order to standardise the split mouth design the quadrants 1 & 4 were assessed together as a set and quadrants 2 & 3 were assessed as a set. A set of these quadrants were randomly assigned to either the test or control quadrants after conventional management was performed in all four quadrants. The base line bacterial colony collection (Micro-IDent®-11, Hain Lifescience GmbH, Nehren, Germany) and the clinical parameters were assessed prior to the commencement of conventional management and were reassessed at the 6 week re-evaluation visit. The set of test quadrants were treated with the diode laser as an adjunct to the preceding conventional management. The control quadrant only received the conventional management. Evaluation of the results demonstrated that the diode laser produced no statistical decrease in the bacterial parameters in the periodontal pockets and resulted in a statistical increase of C. showae (Cs) and T. denticola (Td). The clinical parameters resulted in no statistical difference for any clinical parameter, with the exception of the reduction in BOP that was statistically significant (p< 0,05) with the laser as an adjunct. It is the recommendation that within the limitations of this study, that the utilization of the diode laser (810 ± 10nm) as an adjunct at the initial visit had no statistical effect in the reduction of the bacterial parameters nor resulted in an overall improvement of the clinical parameters.
Abboud, Jaafar Hadi. "Laser surface alloying of titanium by metallic and non-metallic additions." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47732.
Повний текст джерелаConnors, Sean Thomas. "Laser engineered net shaping deposition of M2 tool steel with Niobium additions." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406710485.
Повний текст джерелаFaure, Herlet Nathalie. "Nouveaux matériaux laser dopés néodyme adaptés au pompage par diodes." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10148.
Повний текст джерелаOdarenko, E. N., Y. V. Sashkova, and A. A. Shmat’ko. "Localized field enhancement in slow-wave modes of modified Bragg waveguide." Thesis, IEEE, 2017. https://openarchive.nure.ua/handle/document/18123.
Повний текст джерелаPAQUET, PATRICK. "Photochimie laser des aldehydes aliphatiques. Reactivite et addition sur les esters insatures." Nice, 1993. http://www.theses.fr/1993NICE4605.
Повний текст джерелаIsmail, Huzeifa. "Addition and recombination reactions of unsaturated radicals using a novel laser kinetics spectrometer." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46046.
Повний текст джерелаIncludes bibliographical references (leaves 198-208).
This thesis describes the construction of a novel, low-noise laser kinetics spectrometer. A quasi-CW (picosecond pulse), tunable Ti:Sapphire laser is used to detect various transient species in laser flash photolysis kinetics experiments via direct absorption. The spectral range of the laser, when used with a harmonic generator, covers most of the visible wavelength region, allowing for the detection of a wide array of organic radical species. Paired with a temperature-and pressure-controlled flow reactor equipped with a Herriott-type optical multiple pass cell, transient absorptions of ~0.0001 can be measured, corresponding to cross section - concentration products of less than 1x10-7 cm". The flexibility and high sensitivity of this instrument allows direct and accurate measurement of many important transient intermediates in combustion and atmospheric chemistry.Using this instrument, we report the self-reaction rate coefficient of vinyl and allyl radicals. Vinyl iodide and allyl iodide are used as precursors to generate respective radicals via laser-flash photolysis at 266 nm. Second order chemical reactions require an accurate determination of the initial radical concentration, which we determined using direct laser absorption by I atom at 1315 nm. The current study finds the self-reaction rate constant for vinyl radical to be more than a factor of two slower than previous studies and allyl self reaction rate constant to be 50% faster than values reported in the literature. The absorption cross sections of the vinyl radical at 404, 423.2, & 445 nm and allyl radical at 404 & 408 nm are also determined. This thesis also reports measurements of rate coefficients for the reaction of vinyl radical with various alkenes: ethylene, propene, isobutene, 1-butene, and 2-butene,performed over a temperature range of 300 K to 700 K at 100 Torr. The measured vinyl radical disappearance rates compare well with ab initio quantum calculations. The combined measurements and calculations provide improved estimates for other vinyl + alkene reactions.
by Huzeifa Ismail.
Ph.D.
Lavastre, Eric. "Déclenchement des microlasers solides émettant à 1,55 µm par un dispositif à semiconducteur." Université Joseph Fourier (Grenoble ; 1971-2015), 1998. http://www.theses.fr/1998GRE10173.
Повний текст джерелаGarnier, Nicolas. "Spectroscopie dans l'état excité des ions terres-rares Nd3+ et Tm3+ et fonctionnement laser multilongueur d'onde du YAG : Nd3+." Saint-Etienne, 1997. http://www.theses.fr/1997STET4020.
Повний текст джерелаCharvat, Ales. "Etude, réalisation et caractérisation d'un spectromètre d'absorption intracavité à l'aide d'un laser Ti:Saphir." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10223.
Повний текст джерелаNasiri, Naseer. "Åhaga : a collage of time." Thesis, KTH, Arkitektur, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146753.
Повний текст джерелаÅhaga är en anläggning för musik, teater, sport, mässor, produktlanseringar och andra evenemang som ligger i Borås. Byggnaden ägs och förvaltas av Åhaga Stiftelse och årligen har över 100 000 besökare för olika ändamål. Anläggningen består av den ursprungliga delen från 1903 och tre olika tillbyggnader från 1920, 1940 och 2002. Uppgiften för det här projektet var att göra ett ytterligare tillägg till den befintliga anläggningen och som tar upp frågan om hur nya tillägg tar hänsyn till det kulturhistoriska värdet av en befintlig byggnad och tillsammans med den ursprungliga byggnaden uppfyller nya krav och funktioner. "The accumulation of overlapping traces from successive periods, each trace modifying and being modified by the new additions to produce something like a collage of time” är vad Kevin Lynch skriver i hans bok What time is this place. Kärnan i projektet har varit att lämna spår från vår tid i ett historiskt kontext och samtidigt stärka komplexitet och kontrasten. Målsättningen i projektet har varit att åstadkomma en intressant arkitektonisk helhet.
Goutaland, François. "Processus multiphotoniques, défauts ponctuels et mécanismes de leur formation dans les fibres optiques : étude par spectroscopie laser." Saint-Etienne, 1998. http://www.theses.fr/1998STET4021.
Повний текст джерелаMu, Wangzhong. "Microstructure and Inclusion Characteristics in Steels with Ti-oxide and TiN Additions." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162284.
Повний текст джерелаQC 20150325
Ibrahim, Noor Baa'yah. "Properties of yttrium iron garnet thin films grown by pulsed laser ablation deposition." Thesis, University of Warwick, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343112.
Повний текст джерелаBradford-Vialva, Robyn L. "Development of a Metal-Metal Powder Formulations Approach for Direct Metal Laser Melting of High-Strength Aluminum Alloys." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1620259752540201.
Повний текст джерелаSouchet, Raphaële. "Etude du rôle du fer et du manganèse lors de l'oxydation d'alliages cuivre-nickel industriels." Rouen, 1994. http://www.theses.fr/1994ROUES020.
Повний текст джерелаRameix, Armelle. "Réalisation et caractérisation de nouveaux guides d'ondes pour applications laser à 2 microns." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0176.
Повний текст джерелаPELENC, DENIS. "Elaboration par epitaxie en phase liquide et caracterisation de couches monocristallines de yag dope : realisation de lasers guide d'onde neodyme et ytterbium a faibles seuils." Grenoble 1, 1993. http://www.theses.fr/1993GRE10171.
Повний текст джерелаKuchařík, David. "Přístavba základní školy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392087.
Повний текст джерелаDouysset, Laurence. "Etude de couches minces monocristallines élaborées par épitaxie en phase liquide pour applications laser dans le visible : croissance et caractérisation de couches de LiYF4 dopé terres rares." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10048.
Повний текст джерелаPark, Dae Hoon. "Optimisation de films minces électrochromes à base d’oxyde de nickel." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14031/document.
Повний текст джерелаAiming at enhancing the electrochromic properties of NiO thin films, deposited on FTO substrates, we have employed three different approaches. They deal with: 1) lithium doping of NiO, the corresponding thin film-deposition method is PLD (Pulsed Laser Deposition); 2) NiO nanoparticles embedded into zinc doped amorphous titanium oxide matrix, a solution method is used to deposit the corresponding thin films ; 3) Carbon-doped NiO thin films deposited using, a specific sol-gel method. Owing to lithium doping of NiO, we could induce film amorphization, thereby enhancing the film electrochemical-capacity. Most importantly, the adhesion between the film and the FTO substrate was improved leading to enhanced electrochemical cyclability in aqueous KOH electrolyte. We could enhance the electrochromic performances of TiO2/NiO composite thin films by doping TiO2 with Zn2+, forming to a new composite thin film Ti1-xZnxO2-x?x-NiO. Finally we have successfully stabilized the electrochromic properties (durability and optical property) of NiO thin films in aqueous KOH electrolyte, owing to the development of a specific sol-gel method leading to carbon-doped NiO nanoparticles. For the first time 25000 cycles were successfully achieved without significant decrease of the electrochromic performances
Balembois, François. "Développement de nouvelles sources laser accordables dans l'infrarouge proche autour du cristal de lisaf dope avec l'ion cr#3#+." Phd thesis, Université Paris Sud - Paris XI, 1994. http://pastel.archives-ouvertes.fr/pastel-00713710.
Повний текст джерелаMoscatelli, Michel. "Role du molybdene dans la dissolution et la passivation d'alliages nickel-molybdene : influence du soufre." Paris 6, 1987. http://www.theses.fr/1987PA066542.
Повний текст джерелаChevrier, Véronique. "Optimisation des propriétés photoréfractives du matériau Bi12GeO20: modélisation de la croissance par simulation numérique, dopage au cuivre et élaboration de couches minces." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1994. http://tel.archives-ouvertes.fr/tel-00140019.
Повний текст джерелаSaccoccio, Muriel. "Contribution à l'étude des potentialités des composants actifs à fibre dopée pour applications aéronautiques et spatiales." Toulouse, ENSAE, 1995. http://www.theses.fr/1995ESAE0003.
Повний текст джерелаCyr, Martin. "Contribution à la caractérisation des fines minérales et à la compréhension de leur rôle joué dans le comportement rhéologique des matrices cimentaires." Phd thesis, INSA de Toulouse, 1999. http://tel.archives-ouvertes.fr/tel-00489599.
Повний текст джерелаWatson, Jennifer. "Amplification paramétrique en régime femtoseconde. Application au développement de sources femtosecondes accordables dans le visible et à l'imagerie en milieu diffusant." Phd thesis, Université Paris Sud - Paris XI, 1994. http://pastel.archives-ouvertes.fr/pastel-00713782.
Повний текст джерелаMambou, Josiane. "Dopage au bore à partir de la phase vapeur : étude comparative des couches minces polycristallines et monocristallines de diamant." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10055.
Повний текст джерелаГайдай, Олександр Анатолійович, Александр Анатольевич Гайдай та A. A. Gajdaj. "Обґрунтування технологічних параметрів виїмки тонких і некондиційних вугільних пластів в слабометаморфізованих вміщуючих породах". Thesis, Видавництво НГУ, 2011. http://ir.nmu.org.ua/handle/123456789/130.
Повний текст джерелаДиссертация на соискание учёной степени кандидата технических наук по специальности 05.15.02 - "Подземная разработка месторождений полезных ископаемых". ГВУЗ "Национальный горный университет", Днепропетровск, 2011.
The dissertation on reception of the scientific degree of candidate technical science on a specialty 05.15.02 – «Underground mining of mineral deposits». SHEI “National Mining University”, Dnipropetrovsk, 2011.
Дисертація присвячена обґрунтуванню технологічних параметрів підземної розробки тонких і некондиційних вугільних пластів із присічкою слабометаморфізованих вміщуючих порід, а також установленню діапазону ефективності виїмки за умови запропонованих рішень з підвищення якості гірської маси з урахуванням використання вторинної сировини. Розроблено алгоритм обґрунтування раціональних параметрів технологічних схем виїмки тонких і некондиційних вугільних пластів у складних гірничо-геологічних умовах шахт Західного Донбасу. В дисертації запропоновано залучення додаткового видобутку гірської маси, що виймається з некондиційних вугільних пластів з підвищенням якості при готуванні композиційного палива з використанням відходів гірничого виробництва за допомогою адгезійно-хімічної технології згрудкування. На основі отриманих результатів обґрунтовано технологічні параметри отриманого твердого палива відповідним вимогам при спалюванні, а також можливість використання відходів гірничого виробництва як додатковий видобуток при підземній розробці. Очікуваний річний економічний ефект від впровадження рекомендацій при видобутку на шахті «Дніпровська» ВАТ «Павлоградвугілля» сягає 21,715 млн.грн. Результати запропоновані і впроваджені в технологічні проекти при одержанні додаткового видобутку на вугільних підприємствах Дніпропетровської, Донецької і Луганської областей.
Диссертация посвящена обоснованию технологических параметров подземной разработки тонких и некондиционных угольных пластов с присечкой слабометаморфизированных вмещаючих пород, а также установлению диапазона эффективности выемки при условии предложенных решений по повышению качества горной массы с учетом использования вторичного сырья. В роботе выполнено исследование качества добываемого угля с учётом изменения горно-геологических условий в выемочном столбе. Проведён анализ изменения качественных характеристик добываемой горной массы, по технологической цепочке от очистного забоя на поверхность. Разработан алгоритм обоснования рациональных параметров технологических схем выемки тонких и некондиционных угольных пластов в сложных горно-геологических условиях шахт Западного Донбасса. В диссертации предложено и обосновано привлечение дополнительной добычи горной массы, которая вынимается из некондиционных угольных пластов с повышением качества при приготовлении композиционного топлива с использованием отходов горного производства с помощью адгезионо-химической технологии окускования. Выполнен комплекс исследований гранулометрического, минерального и химического составов добываемой горной массы, угольных штыбов и шламов. При аналитической обработке результатов исследований гранулометрического состава установлено требование к подготовке композиционного топлива к процессу окускования, при котором все пробы, имеющие классы крупности более 5-6 мм, должны быть далее измельчены с помощью механических средств. При изучении минерального и химического состава были получены подробные данные, с помощью которых можно определить виды активирующих или добавляющих адгезионные (клеящие) свойства веществ, а также дать точный прогноз параметров процесса окускования твёрдого топлива. В результате исследований электрокинетических свойств составляющих композиционное топлива экспериментально установлено, что при активации и перетирании показатели заряженности на поверхности частиц увеличиваются в среднем 2-2,5 раза. При этом рост заряженности ведёт к увеличению прочности и улучшению структурообразования топлива. Учёт этих закономерностей позволяет обосновать физико-механические параметры композиционного топлива с крепостью на одноосное сжатие более 90 кг/см2. На основе полученных результатов исследований обоснованы технологические параметры полученного твердого топлива соответствующие требованиям при сжигании, а также возможность использования отходов горного производства как дополнительной добычи при подземной разработке. Ожидаемый годовой экономический эффект от внедрения рекомендаций при добыче на шахте "Днепровская" ОАО "Павлоградуголь" достигает 21,715 млн.грн. Результаты предложены и внедрены в технологические проекты при получении дополнительной добычи на угольных предприятиях Днепропетровской, Донецкой и Луганской областей.
The dissertation is devoted to the substantiation of the technological parameters of underground mining shallow and sub-standard coal layers of weakly metamorphosed adjoining rocks, as well as to determining of the range of the effectiveness of mining in the condition of suggested by decision on the increase of the quality of rock with allowance for using of secondary raw material. The algorithm of the substantiation of the rational parameters of the technological schemes of mining shallow and sub-standard coal layers in complex geological mining conditions on mines of West Donets Basin is developed.
Stavař, Tomáš. "Změna trvanlivosti betonu z recyklovaného betonu variantní adicí silikátových příměsí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225883.
Повний текст джерелаJohansson, Martin. "Hårdgörning av Asp." Thesis, Växjö University, School of Technology and Design, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2291.
Повний текст джерелаHårdgörning av trä syftar till att göra materialet hårdare. Detta går att åstadkomma genom komprimering, det komprimerade materialet tenderar dock att återgå mot sin ursprungsform då materialet utsätts för fukt om ingen låsning sker. Låsningen kan ske mekaniskt i en treskiktskonstruktion som motverkar träets fuktrörelser. Dessa skivor har dock visat sig vara instabila och tidigare försök har uppvisat deformationer i form av kupning. Denna undersökning syftar till att utreda förutsättningarna för att använda komprimerad asp samt att ta fram underlag för framtagning av en kommersiell produkt.
Praktiska tester har genomförts för att studera hårdhet, återfjädring och densitet hos det komprimerade virket. Vidare har treskiktsskivor tagits fram för att testa om det går att få en stabil konstruktion genom att variera tjockleken på spärrskiktet. Även skillnader i acklimatiseringstid och fuktkvotens inverkan för virkets återfjädring har studerats.
Resultaten visar på att aspens hårdhet efter komprimering blir i samma nivå som bok och ask, en låg fuktkkvot vid komprimering av materialet ger en låg återfjädring, komprimerat material har en längre acklimatiseringstid till jämviktsfuktkvot och materialet går att låsa tvärs fiberriktningen i en treskiktskonstruktion.
To make wood harder it can be densified. This can be achieved by compression, the compressed material tends to return to the original shape when it is exposed to moisture fluxations and if no form of fixation occurs. The fixation can be done mechanically in a three-layer panel construction which reduce movements in the timber. These panels have been found to be unstable and previous attempts have shown deformations in form of cupping. This study aims to evaluate the conditions for using compressed aspen wood, and to provide a basis for development of a commercial product.
Practical tests have been conducted to study hardness, springback and density of the compressed wood. In addition, three-layer panels have been developed to test whether it is possible to have a stable construction by varying the thickness of the buttom layer. Differences in acclimatisation time and the moisture contents effect on the springback has aslo been studied.
The results show that the hardness of aspen wood after compression is in equal levels with beech and ashes, a low moisture contet provides a low springback, compressed timber have a longer time for acclimatisation and it is possible to fixate the material in the direction across the grain in a three-layer panel construction.
Wang, Wun-Hong, and 王文宏. "Use FORMOSAT-3/COSMIC radio occultation observation data tostudy ionospheic additional layer." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/ztahe4.
Повний текст джерела國立中央大學
太空科學研究所
96
The earlier study of the additional layer (F3 layer) was primarily focused on simulation and stationary observation from ionosonde. The additional layer phenomenon can only be observed from the station near magnetic equator, and so the physical mechanism is concluded mainly by the E×B vertical drift and meridional neutral wind. In this paper we use FORMOSAT-3/COSMIC radio occultation observations to demostrate the additional layer from September 2006 to August 2007. There are two types of these additional layers, which are foF2
Hu, Tsung-Lun, and 胡宗倫. "Study of the Electrochemically Deposited Copper Oxide for Solar Cell Applications and the Role of Additional Titanium Oxide Layer." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/u47qa8.
Повний текст джерела國立東華大學
材料科學與工程學系
102
The focus of this study is on electrochemical deposition of copper oxide for solar cell applications, and the effect of the additional titanium oxide layer on the solar cell efficiency. We successfully fabricated copper oxide thin film solar cells, with the efficiency as high as 2.49%. The efficiency is further enhanced to 2.94% after the addition of the titanium oxide layer. This type of solar cell possess a characteristic I-V curve which is different from that of a regular solar cell. The curve shows that the current first increases then decreases with applied bias, as the bias voltage increases from 0 V to the open-circuit voltage of the solar cell. We successfully deduced a model of the alignment of the energy band diagram which is the only possible explanation of the characteristic I-V curve. The titanium oxide layer, in additional to its light wave-guiding characteristic, is very possible to slow down the mobility of carriers in the electrolyte solution by its nano-sized porous structure, so to reduce the carrier recombination rate of carriers at the copper/electrolyte solution, and to enhance the solar cell efficiency. We found that the contact between electrolyte solution and metallic copper is a necessary prerequisite for the solar cell to be functional. To solve the leakage problem caused by the liquid electrolyte solution, we replaced it with gel electrolyte solution and successfully assembled the quasi- solid-state solar cells. Furthermore, we also discussed the effects of thin film annealing temperature and electrochemical deposition time on the solar cell efficiency, and compared the difference between the two processes of continuous deposition and pulsed deposition.
Dias, Madalena de Quinhones Levy Rosa. "The effect of an additional layer of adhesive in dentin bond strength of a universal adhesive system in self-etch mode." Master's thesis, 2014. http://hdl.handle.net/10451/25476.
Повний текст джерелаA new generation of one-bottle self-etch dental adhesives is currently being used. The literature refers to them as universal or multi-mode adhesives. Universal adhesives are indicated as either self-etching or etch-and-rinse adhesives. Some clinical studies and laboratory evaluations have been performed, in fact, demonstrating that some universal adhesives may perform at the same level of previous adhesives. Purpose: To evaluate the effect of an additional hydrophobic resin layer (Adper Scotchbond Multipurpose) on the resin-dentin bond strength (_TBS), of the universal adhesive Scotchbond Universal used in a self-etch mode compared to the manufacturer’s instructions. Materials and Methods: A total of six extracted human teeth (n=6) were randomly distributed between two groups for bond strength testing, according to the different adhesive strategy used: Scotchbond Universal applied as a one-step self-etch adhesive as per manufacturer’s instructions (SBU SE D) and Scotchbond Universal applied as a one-step self-etch adhesive followed by one layer of the hydrophobic resin Adper Scotchbond Multipurpose. After composite restoration, specimens composed of sticks with 1mm2 were stored in distilled water (37ºC/24h) and then tested at 1mm/min using micro-tensile tests (_TBS) to assess dentin bond strength. Failure modes were analyzed under a stereomicroscope. Data were analyzed with a parametric pairedsample t-test since the assumptions of normality were valid. Results: For dentin, the use of a hydrophobic resin layer (SBU+A SE D) resulted in a statistically significantly higher mean μTBS value (38,59 ± 22,21 MPa) than the SBU SE D group (27,66 ± 13,22 MPa), (p<0,05) with a 95% confidence interval. Conclusions: Within the limitations of this in vitro study, it can be concluded that the use of a hydrophobic resin layer may be beneficial to the resin-dentin bond strength when applied to dentin with the self-etch mode. Keywords: universal adhesives; self-etch; hydrophobic resin coat; micro-tensile bond strength.
"A study of ion pair aggregation in polymeric system by laser fluorimetry." Chinese University of Hong Kong, 1986. http://library.cuhk.edu.hk/record=b5885709.
Повний текст джерелаShu-Duan, Dai, and 戴淑端. "Using Layer Map Player on Math Addition for Elementary Students, Learning Achievement." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/qexv6a.
Повний текст джерела國立雲林科技大學
技術及職業教育研究所
102
Math is the mother of all sciences. Teaching and learning math plays an important role in global issue. The study aimed to apply software “LayerMap Player” to elementary school math teaching unit. Surveys were undertaken from an elementary school; with empirical research, to investigate stuents’ math addition learning achievements with LayerMap Player. The research tools adopted in the study were” quasi-experimental designs” . The experimental subjects are two classes of fist-grade-student at an elementary school in Yunlin county. They experimental group which accepted the teaching tool with “LayerMap Player” and the other one is controlled group which acceptd traditional teaching. Two groups were accepted two different instructions during twelve periods, eighty minutes each period. In this study, adaptation of "Addition Learning Achievement " test and “Math Learning Attitude” scale as a research tool; through expert examination to obtain the appropriate reliability and validity, then the conduct of its conduct before and after the test. The research data were analyzed by descriptive statistics, T-test, ANCOVA. The results were as follows: 1. Applying LayerMap Player in 1st-grade-student math teaching can make prominent progress in students’ learning achievement and retention effects. 2. Applying LayerMap Player in 1st-grade-student math teaching can make prominent progress in low- achieving and male students’ learning achievement and retention effects. 3. Applying LayerMap Player in math teaching can make prominent progress in 1st-grade-student math learning attitude.
Su, Yang-Yu, and 蘇洋右. "Effect of CH4 Addition on the Plasma Nitrocarburized Layer of Stainless Steel." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/24696778215759180324.
Повний текст джерела大同大學
材料工程學系(所)
96
Four kinds stainless steel designated AISI 316, 410, 430 and SAF 2205 were plasma nitrocarburized for investigation of their electrical resistance, microstructure and hardness distribution of the hardened layers. Plasma nitrocarburizing at low temperature of 420°C with an active screen applied in the process produced a single phase nitrided layer of nitrogen and carbon expanded austenite (S phase) on the specimen surface, which considerably improved the resistivity property of AISI 316 austenitic stainless steel. According to the phase, γ’-Fe4N and ε-Fe2-3N, dominated in the nitcarburized layer, the resistivities of plasma nitrocarburized 410 and 430 specimens are higher than those of the substrate.
"Addition of a Magnetite Layer onto a Polysulfone Water Treatment Membrane to Enhance Virus Removal." Thesis, 2012. http://hdl.handle.net/1911/70398.
Повний текст джерелаSingh, Tarandeep. "Experimental Investigation Of Hypersonic Boundary Layer Modifications Due To Heat Addition And Enthalpy Variation Over A Cone Cylinder Configuration." Thesis, 2009. http://hdl.handle.net/2005/944.
Повний текст джерелаChu, Hsiang-Yi, and 朱祥溢. "Enhancing the Photovoltaic Performance of Perovskite Solar Cells by Addition of Cellulose Derivatives in Photoconversion Layer." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/57535541993443569294.
Повний текст джерела國立中興大學
化學工程學系所
105
In this study, cellulose (hydroxyethylcellulose, HEC) was used as an additive and doped into perovskite precursor solution to improve the crystal sizes of perovskite layer and photovoltaic (PV) performances of perovskite solar cells (PSCs). By adjusting doped content of HEC and thermal annealing temperature of perovskite layer, to obtained shiny smooth perovskite films with excellent electronic quality, avoiding the creation of unwanted defects during crystallization process, for example, pinholes and grain boundaries. The arichitecture of HEC based inverted PSC was ITO/PEDOT:PSS/Perovskite:HEC/PC61BM/Ag. The power conversion efficiency (PCE) of 8.96%, a short-circuit current density (Voc) of 0.88 V, a short-circuit current (Jsc) of 15.23 mA/cm2, and a fill factor (FF) of 66.8% were obtained for the HEC based PSC. In addition, chloro-deoxy-hydroxyethylcellulose (CDHC) and bromo-deoxy-hydroxyethylcellulose (BDHC) were synthesized and used as the additives of perovskite layer. PV properties of CDHC and BDHC incorporated PSCs were better than that HEC incorporated PSC. The presence of chloride and the bromide ions in the perovskite layer suppressed the crystalline rate of perovskite, whih result in the larger size of crystals in the perovskite layer. This is due to the difference of electron negativity between chloride (or bromide) ion of celleulose derivative and iodide ion of PbI2. The highest PCE (11.03%), Voc (1.01V), Jsc (17.57mA/cm2), and FF (62.1%) were obtaind for the CDHC incorporated PSC.
LI, LI-YU, and 李立宇. "The influence of argon addition on the output of mixed flow CO2 laser." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/36121869960174002343.
Повний текст джерелаCheng, Liu Chang, and 劉昌政. "Mechanical Properties of 304L Stainless Steel with Addition of WC by Laser Melting." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/18215600779033474398.
Повний текст джерелаHseih, Yu ming, and 謝喻明. "The effects of multi-layer cathode and anode and noble metal addition on the methane-fueled SC-SOFC." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/69750266471060677680.
Повний текст джерела國立臺灣科技大學
化學工程系
98
The purpose of this study intends to use different methods to improve the anode and cathode for improvement of cell performance of single-chamber solid state oxide fuel cell (SC-SOFC). To reach the goal, Sm0.5Sr0.5CoO3 (SSC)/ Sm0.2Ce0.8O1.9 (SDC) of different ratios, particle size and composition of the multi-layer cathode was investigated. For anode, diverse ratio of NiO and SDC, pore former (graphite) for preparation of anode functional layer were considered for multi-layer electrode purpose. In addition, the influence of precious metal (Pd, Rh) added in each anode layer was realized. The as prepared anodes and cathodes were characterized by scanning electron microscope (SEM), AC impedance and electrochemical analysis. The performance of the cell was examined at the temperature range of 500-700℃. Methane and air were used as fuel resource and the ratio of volume flow rate is 2:1. First of all, the experimental results show that the best composition ratio for the both NiO/SDC anode and SSC/SDC cathode were 7:3. It is also noted that the cathode made of diverse particle size as well as functional graded SSC (content in four-layer cathode and the particle size in 1st layer is smaller than others) shows better performance than that of homogeneous layer does. For SSC-SDC cathode, the maximum power density of the cell of four layer electrode with smaller particle size for first layer was able to deliver 414.39 mW/cm2 at 600℃. For NiO-SDC anode, a three-layer of various particle size and porosity-graded structure were superior to a homogeneous one. It was found that the maximum power density of cell with three-layer electrode of anode functional layer (AFL) could reach 478.06 mW/cm2 at 600℃. Finally, the benefit of the addition of noble metal to the anode is demonstrated. Pd was added to the middle and outer layers of the three-layer anode. It is found that the maximum power density was 535.86 mW/cm2 with 7 wt% Pd at 600℃. However, carbon deposition on the anode surface was not able to be avoided. Once Pd was incorporated into the other layer attached to the electrolyte, reduction of the cell performance was found. For addition of Rh to the anode side, similar power density of 520 mW/cm2 was obtained with only Rh loading of 0.3 wt% at 600℃. Surprisingly, no carbon deposition was found on the anode.