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Dissertations / Theses on the topic 'The quenching effect'

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Published: 24 April 2022

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1

Xia, Chun, and Chun Xia. "Concentration Quenching Effect in Rare-earth Doped Glasses." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624145.

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Concentration quenching effect in ytterbium (Yb) and neodymium (Nd) doped phosphate glasses, thulium (Tm) doped germanate glass, and praseodymium (Pr) doped tellurite glass were studied. The fluorescence and lifetime of these rare-earth doped glasses with different concentrations were measured. Ion pair and clustering are included in the model to explain the quenching effect occurring in highly doped glasses. This study will help us in designing and fabricating high unit gain optical fibers.
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2

COELHO, DANIEL MASSARI DE SOUZA. "EFFECT OF THE AUSTENITIZATION TEMPERATURE ON THE QUENCHING AND PARTITIONING PROCESS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=12177@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O processo de Têmpera e Partição (T&P) possibilita a produção de aços com frações controladas de austenita retida, a partir do enriquecimento da austenita pela partição de carbono da martensita sem a precipitação de carbonetos. A austenita retida proporciona o efeito TRIP (plasticidade induzida por transformação), que confere ao material uma deformação uniforme e uma melhor absorção de energia durante o impacto. Os aços produzidos por este processo atendem principalmente às necessidades da indústria automobilística, que busca aço
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3

Lee, Lin. "The effect of flow rate, spray distance and concentration of polymer quenchant on spray quenching performance of CHTE and IVF probes." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050205-151345/unrestricted/LinLeeThesis.pdf.

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4

Li, Yu. "Effect of aluminium and vanadium on the microstructure and properties of microalloyed steels." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366804.

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5

Xu, Rixin. "Finite Element Modeling and Simulation on the Quenching Effect for Spur Gear Design Optimization." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1217868964.

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6

Grisenti, David L. "The effect of bimolecular quenching reactions on energy transfer processes in oligometallic metal to ligand charge transfer excited states." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1495960661&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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7

Borasi, Luciano. "Investigation of the Effect of Different “Q&P” Parameters on the Mechanical Properties of AHSS." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70060.

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In the present study, the influence of the quenching temperature and partitioning conditions (temperature and time) have been investigated on a 0.6%C-1.2%Mn-1.6%Si-1.75%Cr alloy. Maps of hardness, impact toughness and amount of retained austenite have been developed for three quenching temperatures as a function of partitioning temperature and partitioning time. Results demonstrate that, in this material, the carbon depletion of the martensite and the stabilization of austenite can be achieved significantly faster at high partitioning temperatures, promoting higher retained austenite fractions
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8

Adeyemo, Adedayo Oluwagbemiga David. "Modulation of apoptosis and its regulatory proteins in colorectal cancer cells : effect of oxidant quenching and NSAIDs on (5 Fu) chemotherapy-induced toxicity." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404584.

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9

Huyghe, Pierre. "ON THE RELATIONSHIP BETWEEN MICROSTRUCTURE DEVELOPMENT AND MECHANICAL PROPERTIES IN Q&P STEELS." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/278740/5/contratPH.pdf.

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The Quenching and Partitioning (Q&P) heat treatment has been proposed in the early 2000s to produce cold-rolled sheets combining high-strength and formability for the automotive market. Q&P consists, first, of an interrupted quench between the martensite-start temperature (Ms) and the martensite-finish temperature (Mf) from intercritical annealing or full austenitization in order to form controlled fractions of martensite. This is followed by a partitioning step in order to stabilize the untransformed austenite through carbon enrichment. In order to maximize the carbon transfer from martensite
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10

Kaijalainen, A. (Antti). "Effect of microstructure on the mechanical properties and bendability of direct-quenched ultrahigh-strength steels." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213491.

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Abstract The effect of austenite pancaking in the non-recrystallisation regime on microstructure and mechanical properties, especially bendability, was investigated in direct-quenched ultrahigh-strength strip steels with martensitic-bainitic microstructures. Lowering the finishing rolling temperature (FRT) increased total reduction in the non-recrystallisation region (R tot). Niobium microalloying increased Rtot while variations in C, Mn and Mo did not affect Rtot to the same extent as Nb. A decrease in the FRT increased the incidence of softer microstructures such as ferrite and granular bain
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11

Aksoy, Fuat Yigit. "Interaction of Metal Nanoparticles with Fluorophores and Their Effect on Fluorescence." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1240302257150-32578.

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Metal nanoparticles have recently gained popularity in many research areas due to their nanosize-related properties. Depending on the size of the metal nanoparticle, their mode of interaction with electromagnetic radiation and the outcome of this interaction vary; in turn the effect exerted on a protein which is conjugated to a nanoparticle varies, because different sized nanoparticles demonstrate different modes of energy transfer with electromagnetic radiation and molecules conjugated to them. Very small cluster with sizes around 1 – 1.2 nm tend to get excited by incident light and emit fluo
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12

Melado, André Caetano. "Ferros fundidos nodulares de alta resistência obtidos por tratamento térmico de têmpera e partição: microestrutura e comportamento mecânico." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-16072018-134449/.

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A aplicação do novo conceito de tratamento térmico, chamado de têmpera e partição (Q&P), desenvolvido para a obtenção de aços da terceira geração da classe AHSS (Advanced high strengh steel ou aços avançados de alta resistência), mostra-se uma alternativa para o processamento de ferros fundidos nodulares com alta resistência mecânica. No processo Q&P, o carbono presente na martensita supersaturada, formada na etapa de têmpera, é utilizado para estabilizar a austenita não transformada durante a etapa de partição, mantendo-a estável na temperatura ambiente. Essa rota de tratamento térmico consis
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13

Wickremasinghe, Niranjala D. "Optical Properties of Organic Films, Multilayers and Plasmonic Metal-organic Waveguides Fabricated by Organic Molecular Beam Deposition." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439307144.

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14

Gelloz, Bernard. "Contribution à l'étude des mécanismes de conduction du silicium poreux : application aux phénomènes de luminescence." Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10153.

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Ce travail est consacre aux mecanismes de conduction du silicium poreux en contact avec un electrolyte liquide conducteur, ainsi qu'a l'etude du comportement de la luminescence sous polarisation. La premiere partie presente les principales caracteristiques de la luminescence du silicium poreux ainsi que les differents modeles qui ont ete proposes pour en expliquer les mecanismes. La deuxieme partie est consacree a la description des methodes experimentales utilisees pour la fabrication des couches poreuses et l'etude de leurs proprietes de photo et d'electroluminescence. Dans une troisieme par
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15

Rondeau, Darrell K. "The effects of part orientation and fluid flow on heat transfer around a cylinder." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0512104-174214/.

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16

Cai, Lezhen. "Mechanisms and salt effects in photoredox and quenching processes involving cobalt(III) complexes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21925.pdf.

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17

Guo, Guannan. "Aluminum microstructure evolution and effects on mechanical properties in quenching and aging process." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/334.

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"High strength aluminum alloys are recently widely used in aircraft, automobile and construction industry fields. Typical T6 heat treatment process can be applied to improve the heat treatable aluminum alloy in order to facilitate the formation of prime strengthening precipitate phases. Critical steps in T6 heat treatment process include solution treatment, quenching and aging. Due to high thermal gradients in quenching process and aging process, large thermal stress will remain in the matrix and may bring unexpected deformation or distortion in further machining. Therefore, in order to predic
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18

Dorcéna, Cassandre Jenny. "Effects of Metallic Nanoalloys on Dye Fluorescence." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35057.

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Metallic nanoparticles (NPs) are exploited for their ability to interact with organic compounds and to increase significantly the fluorescence intensity and the photostability of many fluorescent dye molecules. Metal enhanced fluorescence (MEF) is therefore widely investigated for biosensing applications. When used in immunoassays, silver island films (SIFs) could augment the fluorescence intensity of fluorescein by a factor of seventeen; SIFs were also able to double or triple the emission intensity of cyanine dyes which are commonly used in (deoxyribonucleic acid) DNA microarrays. The emissi
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19

Turcios, Marco Antonio. "Effects of cold wall quenching on unburned hydrocarbon emissions from a natural gas HPDI engine." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/38308.

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The quenching of hydrocarbon flames on cold surfaces is considered to be a potential source of unburned hydrocarbon (UHC) emissions from internal combustion engines, but its contribution to emissions has been difficult to determine due to the strong coupling between physics, chemistry and flame/wall geometry. This is particularly problematic for high pressure direct injection (HPDI) engines where high pressures, inhomogeneous mixtures and complex piston geometry are present. In this work, a computational model is implemented to determine the distance at which hydrocarbon flames quench on cold
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20

Theron, Maritha. "Quenching and tempering effects on Rheo-cast F357 aluminium alloy during Nd: YAG laser welding." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/26148.

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Al-Si-Mg casting alloys are being used in automotive applications, aerospace applications and other applications requiring heat-treatable permanent mould castings that combine good weldability with high strength and toughness (ASM). These casting alloys are also known for their excellent castability, corrosion resistance and, in particular, .a range of mechanical properties in the heattreated condition. A357 aluminum alloy has been extensively used for semi-solid processing for more than three decades, and a large amount of components like fuel rails, engine mounts, engine brackets and suspens
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21

Perkins, Thomas Edward James. "The effects of electronic quenching on the collision dynamics of OH(A) with Kr and Xe." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:5998e249-35ff-4d05-9c13-9b65d59b11d9.

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This thesis presents an experimental and theoretical study of the collision dynamics of OH(A<sup>2</sup>Σ<sup>+</sup>) with Kr and Xe. These two systems both exhibit a significant degree of electronically non-adiabatic behaviour, and a particular emphasis of the work presented here is to characterise the competition and interplay between electronic quenching on the one hand, and electronically adiabatic collisional processes on the other. Quenching takes place close to the bottom of the deepest potential well for both systems. In collisions that remain in the excited electronic state, this sam
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22

Lee, Sang Hwa. "Quenching effects, mechanisms, and kinetics of nickel(II) chelates and carotenoids in singlet oxygen oxidation of soybean oil /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487670346873481.

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23

Mekideche, Abdeslam. "Effet mémoire de forme et plasticité de transformation dûs à la transition C. F. C. ↔T. F. C. D'alliages Mn Cu riches en Mn." Lyon 1, 1985. http://www.theses.fr/1985LYO19016.

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Les alliages Mn-Cu riches en Mn ( 80-100 %) trempés depuis haute température à 1’état cubique à face centrées présentent vers la température ambiante une transformation sans diffusion c. F. C. ↔ t. F. C. à caractère quasi-martensitique. Ce travail a pour objet l'étude de la plasticité de transformation et de la mémoire de forme liés à cette transition. Un appareil simple permettant la mesure de la déformation de flexion de plaquettes en fonction de la température et de la charge appliquée , a été mis au point et utilisé. Il a été montré que la plasticité de transformation comme l'effet mémoire
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24

Allen, F. S. "The effect of quenchant characteristics on the generation of thermal stress and strain in steel plates." Thesis, Sheffield Hallam University, 1987. http://shura.shu.ac.uk/19661/.

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A visco-elastic-plastic mathematical model developed at Sheffield City Polytechnic was used to calculate the thermal stress and strain generated during the quenching of an infinite plate of high hardenability steel (835M30) in water, nine experimental oils and a polymer. In.the case of water, previous comparisons between experimental and calculated residual strains was poor. This discrepancy, during the present investigation, was reduced by introducing into the model the relationship between actual surface temperature and surface heat transfer coefficients and by incorporating the effects of v
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25

Ma, Shuhui. "A methodology to predict the effects of quench rates on mechanical properties of cast aluminum alloys." Link to electronic dissertation, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050106-174639/.

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Dissertation (Ph.D.)--Worcester Polytechnic Institute.<br>Keywords: Time-Temperature-Property curve, Jominy End Quench, ANOVA analysis. Quench Factor Analysis, Taguchi design, Polymer quench, Cast Al-Si-Mg alloys, Quenching, Heat treatment. Includes bibliographical references (p.115-117).
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26

Koka, Vivian Dzigbodi. "A Study of the Effects of Titanium Dioxide Nanoparticles on the Fluorescent Intensity of Fluorescent Compounds in the Presence of Known Quenchers." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1384.

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Titanium Dioxide is a naturally occurring oxide of titanium. It has a wide range of uses in commercial products for providing whiteness and opacity. It has photocatalytic properties and can also be used to produce electricity in its nanoparticles form. This research is focused on investigating the effect of titanium dioxide nanoparticles in analysis of compounds using luminescence-based techniques. Quenching, which is one of the basic problems of fluorescent measurements, was studied in the presence of molecular oxygen and methyl iodide. The rutile phase of titanium dioxide nanoparticles was s
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27

Odame-Ankrah, Charles Anim. "Studies of Titanium Dioxide Nanoparticles and Surfactants Effects, Singly and in Combinations, on Luminescence Intensity of Some Aromatic Compounds." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etd/1799.

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Luminescence techniques are sensitive, selective, and widely used in analysis. Luminescence intensity is attenuated by quenchers. This research has focused on the use of surfactants such as CTAB, SDS, and TX-100 singly or together with TiO2 nanoparticles to evaluate their individual and combined effects on some fluorescent aromatic compounds such as pyrene, fluoranthene, anthracene, phenanthrene, and carbazole. Rutile phase TiO2 was synthesized using the low temperature sol-gel method. Carbazole and phenanthrene were severely quenched by all surfactants singly or in combination with TiO2. Anth
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28

Andrae, Johan. "Wall Related Lean Premixed Combustion Modeled with Complex Chemistry." Doctoral thesis, KTH, Kemiteknik, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3455.

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Increased knowledge into the physics and chemistrycontrolling emissions from flame-surface interactions shouldhelp in the design of combustion engines featuring improvedfuel economy and reduced emissions. The overall aim of this work has been to obtain afundamental understanding of wall-related, premixed combustionusing numerical modeling with detailed chemical kinetics. Thiswork has utilized CHEMKIN®, one of the leading softwarepackages for modeling combustion kinetics. The simple fuels hydrogen and methane as well as the morecomplex fuels propane and gasified biomass have been used inthe mod
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29

Berroudji, Sid-Ahmed. "Cinétiques de mise en ordre à courte distance et caractéristiques des lacunes et des autointerstitiels dans des alliages [gamma]-FeNiCr." Grenoble 1, 1988. http://www.theses.fr/1988GRE10095.

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Etude des cinetiques de mise en ordre dans les alliages fe::(59)ni::(25)cr::(16) et fe::(9)ni::(75)cr::(16) par mesure de resistivite electrique. Determination des caracteristiques des lacunes et autointerstitiels par les techniques de trempe a l'helium liquide, de mesure de resistivite lors des cycles alternes de chauffage et de trempe ou lors de cycles continus. Evaluation des enthalpies de formation, de migration et d'autodiffusion. Influence de la composition. Analyse des sursaturations dynamiques de defauts lors de l'irradiation. Determination des frequences de saut des autointerstitiels
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30

Fahlkrans, Johan. "Effects of manufacturing chain on mechanical performance : Study on heat treatment of powertrain components." Licentiate thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163665.

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The increasing demands for lightweight designs with high strength call for improved manufacturing processes regarding heat treatment of steel. The manufacturing process has considerable potential to improve the mechanical performance and to obtain more reliable results with less variation. The goal of this thesis is to establish new knowledge regarding improved manufacturing processes in industrial heat treatment applications. Three research questions with associated hypotheses are formulated. Process experiments, evaluation of the mechanical performance, and modelling of the fatigue behaviour
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31

Laisney, Jérôme. "Influence de l’environnement sur la commutation et la bistabilité thermique de micro- et de nanoparticules à transition de spin." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112002.

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Les composés à transition de spin forment une classe spécifique de matériaux pour lesquels la commutation de l’état de spin du centre métallique peut être pilotée par divers stimuli (T, P, irradiation lumineuse, …) et s’accompagne de changements remarquables des propriétés physiques (magnétiques, optiques, structurales ou encore vibrationnelles). Ils se distinguent des autres matériaux commutables par l’observation, pour un certain nombre d’entre eux, de processus coopératifs à l’état solide, donnant lieu à l’ouverture d’une hystérèse thermique (bistabilité) particulièrement intéressante pour
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32

Wilson, Flore Adjélé. "Étude du mécanisme de photoprotection lié à l’Orange Carotenoid Protein et ses homologues chez les cyanobactéries." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS503/document.

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La lumière est essentielle pour les organismes photosynthétiques qui convertissent l'énergie solaire en énergie chimique. Cependant, la lumière devient dangereuse lorsque l'énergie qui arrive aux centres réactionnels de l'appareil photosynthétique, est en excès par rapport à l’énergie consommée. Dans ce cas, la chaîne de transport d'électrons photosynthétiques se réduit et les espèces réactives de l'oxygène (ROS) sont accumulées, notamment au niveau des deux photosystèmes, PSI et PSII. Les cyanobactéries ont développé des mécanismes photoprotecteurs qui diminuent l'énergie transférée au PSII a
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Tong, Shun-Chen, and 童順晨. "The Effect of PVP Polymer Quenchant Parameters and Nano-Particle Additives on Quenching Characteristics for Steels." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/su456f.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>103<br>The purpose of this article is to investigate the effect of PVP type polymer quenchant parameters including concentration, fluid agitation velocity, temperature, and nano-particle additives on quenching characteristics for several selected steels. By changing the parameters of PVP polymer quenchant and adding montmorillonite nano-particle additives, we reveal the effect of these parameters on the hardness distribution, hardening depth, quenching distortion and microstructures for several selected steels, and also look for the optimum quenchant paramet
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Che-WeiLin and 林哲緯. "Effect of Uphill Quenching on the Microstructure and Properties of FC300." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/73604012812030875810.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>100<br>Precision machine tool industry has been toward the high precision and high stability, so the request of cast iron was more strict and hard to achieve. If the precision machine tool was made of unstable gray cast iron, the error of accuracy would be accumulated by using time increased. In this study, gray cast iron(FC300) by used material in precision machine tool was studied. Using uphill quenching to compare with the influence produced by natural aging is a method to research stability of gray cast iron. In this experiment, feasibility of uphill quenching
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"Study of Layout Techniques in Dynamic Logic Circuitry for Single Event Effect Mitigation." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-09-2253.

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Dynamic logic circuits are highly suitable for high-speed applications, considering the fact that they have a smaller area and faster transition. However, their application in space or other radiation-rich environments has been significantly inhibited by their susceptibility to radiation effects. This work begins with the basic operations of dynamic logic circuits, elaborates upon the physics underlying their radiation vulnerability, and evaluates three techniques that harden dynamic logic from the layout: drain extension, pulse quenching, and a proposed method. The drain extension method adds
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Hu, Yao-Jen, and 胡耀仁. "The Quenching Effect of Cold Walls on Steady Laminar Premixed H2/O2 Flame." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/86570099330314332652.

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Li, Yan-Shen, and 黎諺燊. "Effect of Minor Zr and Cold Working on Quenching Sensitivity of Al-4.7Zn-1.6Mg Alloys." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/gmnjqs.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>105<br>We investigate the effect of minor Zr and cold working on quenching sensitivity of Al4.7Zn1.6Mg alloy by microstructure observing, DSC measurement and Jominy End Quench Test, and so on. The result shows that Zr element can inhibit quenching sensitivity significantly, while cold working make quenching sensitivity of Al4.6Zn1.6Mg(0.1Zr) obviously. Recrystallization motivation of cold worked Al4.6Zn1.6Mg0.1Zr alloy is larger than hot extruded one and there are many low coherency Al3Zr particles as heterogeneous nucleation sites in the new grains, so th
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Ou, Siou-Ci, and 歐修齊. "The Effect of Carburizing Parameters and Quenching Hardening Methods on Surface Hardening Characteristics for Steels." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/rs48z6.

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碩士<br>國立虎尾科技大學<br>材料科學與工程系材料科學與綠色能源工程碩士班<br>104<br>The purpose of this study is to investigate the effect of different carburizing parameters and quenching method on hardness distribution, hardening depth, quenching distortion, wear resistance and microstructures for two common carburizing steels which are JIS-S15C and JIS-SCM415 respectively. The study also looks for the optimum parameters that can reduce the quenching distortion and increase the wear resistance of the steels specimens which were high frequency induction hardened after carburizing. Finally, comparisons of quenching characteri
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CHEN, YU-TING, and 陳玉庭. "Using fluorescence quenching effect to investigate the electrical neutralization ability for different aromatic organic compounds." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/cqc37x.

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碩士<br>國立聯合大學<br>環境與安全衛生工程學系碩士班<br>107<br>The sources of organic matter in water include natural organic matter and synthetic organic matter. Natural organic matter in water not only causes color, taste and odor problems, but also produces harmful disinfection by-products. Most part of natural organic matter in water is humic substances which has strong complexation ability with heavy metals. On the other hands, in synthetic organic matter, dye is used in the textile industry. The discharge of textile wastewaters has a negative effect on Water quality, reducing the light penetration, and conseq
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CHEN, CHAO-FENG, and 陳昭鳳. "Using Fluorescence Quenching Effect to Investigate the Electrical Neutralization Ability for Different Types of Aluminum Ions." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/33536502646805205897.

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碩士<br>國立聯合大學<br>環境與安全衛生工程學系碩士班<br>105<br>In general, the electrical neutralization capacity of coagulant is affected by its polymerized status. For example, the main species of polyaluminum chloride is Al13 ([AlO4Al12(OH)24(H2O)12]7+), whose production process has occurred prehydrolysis phenomenon. It was reported that the polyaluminum chloride was more stable than Al3+ ions in an actual coagulation procedure. Therefore, the polyaluminum chloride performance to neutralize the electric charge of the suspended particles is better than that of the Al3+ ions. In the past, alkaline was added to inc
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Lu, Yi-Tsang, and 呂佾倉. "Using Fluorescence Quenching Effect to Investigate the Electrical Neutralization Ability for Humic Acid and Different Types of Metals." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/586ed4.

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碩士<br>國立聯合大學<br>環境與安全衛生工程學系碩士班<br>107<br>Humic Acid (HA) is an important natural organic matter that existence of HA not only affects the color and smell of water, but also produces toxic disinfection by-products. Therefore, it is important to remove humic acid from drinking water. Chemical coagulation is a commonly used technique in water treatment processes. Currently, electrochemical neutralization is associated with coagulant type, solution pH, solution temperature, stirring intensity and background ion reaction between coagulant and colloidal particles. Therefore, under the premise which
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YANG, GUAN-ZHI, and 楊貫智. "A Study on the Absorptivity of Inconel 718 and Quenching Effect of AISI 1045 Steel by Laser Heating Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/f54s23.

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碩士<br>國立高雄應用科技大學<br>機械工程系<br>106<br>In this study, the temperature field of Inconel 718 nickel-based alloy in the pre-heating process was investigated. The influence of laser process parameters on the laser quenching of AISI 1045 steel was analyzed. The Inconel 718 nickel-based alloy and AISI 1045 steel was heated by laser. The relation between the laser absorption of Inconel 718 nickel-based alloy and the variety of laser powers, rotational speeds and feed rates of laser is discussed. The feasibility of surface hardening for AISI 1045 steel was verified by using different feed rates and laser
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Beauchamp, David L. "The Effect of Salts on the Conformational Stability of Proteins." 2012. http://hdl.handle.net/1993/5306.

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It has long been observed that salts affect proteins in a variety of ways, yet comprehensive explanations for different salt effects are still lacking. In the work presented here, the effect of salts on proteins has been investigated through three different effects: the hydrophobic effect; their conformational stability; the hydrogen bonding network of water in a protein’s hydration shell. UV-vis absorbance and fluorescence spectroscopy were used to monitor changes in two model systems, the phenol-acetate contact pair and the model enzyme ribonuclease t1. It was shown that salts affect the hyd
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Huang, Shun-Hong, and 黃舜宏. "The Effect of High Frequency Induction Hardening Parameters, Pre-heat Treating Conditions and Quenching Mediums on Surface Hardening Characteristics for Some Selected Steels." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/ab3sja.

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碩士<br>國立虎尾科技大學<br>材料科學與工程系材料科學與綠色能源工程碩士班<br>104<br>In this study, JIS-S45C, JIS-SCM440 and JIS-SUJ2 steels which were pre-heat treated with different conditions were conducted high frequency induction surface hardening by using different quenching mediums. The objective of this study was to clarify the effect of high frequency induction hardening parameters (input power, motion velocity of the coil), pre-heat treating conditions (normalizing, thermal refining) and quenching mediums (water, 5%PVP polymer quenchant) on the distribution of hardness, hardening depth, microstructures, quenching dis
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Schwerg, Juljan Nikolai [Verfasser]. "Numerical calculation of transient field effects in quenching superconducting magnets / Juljan Nikolai Schwerg." 2010. http://d-nb.info/1001586972/34.

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Cai, Lezhen. "Mechanisms and salt effects in photoredox and quenching process involving cobalt (III) complexes." Thesis, 1996. https://dspace.library.uvic.ca//handle/1828/9694.

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The novel complexes [special characters omitted] and [special characters omitted] were prepared and characterized. Photoredox quantum yields for the formation of [special characters omitted] from the above compounds were measured on irradiation at 360 nm to be 0.065, 0.082, 0.0088 and 0.0040 respectively. With added thiocyanate a significant increase in ΦCo2+ occurred. This can be modeled in two ways; (i) scavenging of thiocyanate radical from an initial caged radical pair giving 6-25 ps estimates for the lifetime of the latter species; (ii) photolysis of a thiocyanate/complex ion pair,
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Yi-KuiHe and 何翊魁. "Effects of quenching environment and thermomechanical treatment on structure and properties of Ti-7.5Mo alloy." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/pabnar.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>101<br>The first test is about solution treatment by different quenching environment for Ti-7.5Mo alloy, discussed the effect of quench media and the temperature of quench media.The first experiment divided into three parts discussed:Water quenching,and temperture is from W1 to W3℃.Oil quenching, and temperture is from O1 to O4℃. Salt bath quenching, and temperture is form S1 to S3℃. In the condition of water quenching,yield strength is 533MPa,tensile strength is 864MPa,ductility is 34%,elastic modulus is 80GPa,and crystal structure is α phase.In the conditi
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劉煥文. "The Effects of C and Si on Austempering during Quenching Stage of Ductile Irons and Cast Steels." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/08662270388062444575.

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碩士<br>國立臺灣科技大學<br>機械工程技術研究所<br>86<br>In this paper the methods of heat treating and metallography were used to study the effects of carbon and silicon content of ductile irons and cast steels on the cooling behavior and phase transformation during quenching period of austempering process. The characteristic of cooling curves and microstructures of ductile irons and cast steels was compared. The results shows that the recalesence was appearing both on the cooling curves of ductile irons and cast steels, the ductile irons austempered at 300℃ had most significant recalesence, and less significanc
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Howard, Brittany. "A comparison of the effects of local and global environment on galaxy evolution in low redshift galaxy clusters." Thesis, 2019. http://hdl.handle.net/1828/11450.

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Using the redMaPPer catalog of 21709 galaxy clusters and photometric information for 455946 galaxies from SDSS DR8, we study the effects of local and global environment on galaxy evolution within clusters in the redshift range 0.2 ≤ z ≤ 0.5 and the richness range 20 ≤ λ ≤ 236. We use cluster richness λ as a proxy for global environment and cluster-centric radius dBCG to represent the local environ- ment within clusters. We measure giant-to-dwarf ratio (GDR) which gives insight regarding the composition of the red sequence, and we measure red fraction which holds information about the rate at w
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Cheng, Wen-An, and 鄭文安. "Effects of Different Quenching Cooling Rates at Different Temperature Ranges on Impact Toughness of Hot Work Tool Steels." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/18940587566355591274.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>104<br>This study used the steel of JIS SKD61 and the improved steel as experimental materials. The quenching temperature (1020℃) and holding time (1hr) were fixed for quenching at different cooling rates. The cooling process was divided into three stage during quenching, which are the high temperature range (1020℃~700℃), moderate temperature range (700℃~500℃) and low temperature range (500℃~300℃). In order to simulate the actual temperature change in the mold center thicker than 300mm in the field quenching operation, the appropriate quenching cooling rate was reas
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