Дисертації з теми "Cell transmission models"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-44 дисертацій для дослідження на тему "Cell transmission models".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Tarhini, Hussein Ali. "Network Models In Evacuation Planning." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/64359.
Повний текст джерелаPh. D.
Maximilien, Jacqueline. "Studies of the impact of core-shell polystyrene nanoparticles on cell membranes and biomimetic models." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2180.
Повний текст джерелаThis project’s aim was to study polymeric nanoparticle-membrane interactions using both live cells and biomimetic models with the idea to validate such nanoparticles for use in bio-applications. Core-shell polymeric nanoparticles below 100 nm, as this small size is capable of penetrating plasma membranes, were synthesised. Nanoparticles (NPs) with the same chemical composition but with hydrodynamic diameters of ~250 nm, were also prepared in an effort to highlight any effect of NP size on cell internalisation. In this thesis, an innovative method is presented for the synthesis of water-compatible, iniferter-bound polystyrene core shell NPs (~30 nm) using a one-pot synthetic method. A plethora of functionalities could be added to the nanoparticles via shell grafting from the surface of the polystyrene core in the presence of additional monomers via controlled living radical polymerisation. Shell thickness could be tuned as a function of monomer’s concentration and polymerisation time. The nanoparticles were fully characterised by dynamic light scattering, Fourier transform infra-red spectroscopy, microelemental analysis and transmission electron microscopy. Further, the interactions of polystyrene core NPs possessing neutral and anionic shells were investigated using neonatal human epidermal keratinocytes (NHEK), human primary fibroblasts and HaCaT cells. Cytotoxicity studies performed using propidium iodide and lactate dehydrogenase indicated no evidence of cytotoxicity in either cell line. However, cell proliferation monitored by electric cell substrate impedance sensing (ECIS) protocols indicated that anionic nanoparticles induced a dramatic decrease in cell proliferation in keratinocytes. The cellular internalisation of NPs was confirmed by confocal microscopy and no co-localisation was found with early endosomes, lysosomes or actin. Additionally, fluorescence activated cell sorting (FACS) data support the theory that an energy-dependent mechanism is employed for neutral NP internalisation but less so for negatively charged NPs. Biomimetic membrane models were used to investigate specific nanoparticle-lipid interactions under controlled conditions. Employing giant vesicles coupled with fluorescent spectroscopy techniques revealed that core-shell nanoparticles interact deep in the hydrophobic region of bilayers only when the membrane is in the fluid phase. Their mode of entering artificial cells (i.e giant vesicles) appears to cause the formation of pores. Anionic nanoparticles interact with the choline moiety of phosphatidylcholine and confer a rigidifying effect on phosphocholine containing bilayers. Therefore we conclude that the polymeric nanoparticles that we synthesized are versatile tools for cell interaction and imaging studies. These nanomaterials could eventually be applied to drug delivery studies by incorporation of the drug in for instance a thermoresponsive polymeric shell. Furthermore, it is clear that NPs coated with anionic and neutral polymeric shells present a lower toxicity profile than previously reported cationic nanoparticles. Both nanoparticles increase the order lipid bilayer vesicles composed of POPC (the most common glycerophospholipid) in animal and plants. Anionic nanoparticles in particular exhibit a rigidifying effect on POPC lipid bilayers and their mode of entry into cells may be due to the formation of pores which was determined to not induce cell death
Kacou, Marc Emmanuel Vivien-Marie Wozan. "Design of Models for the Planning of Indoor Multi-technology Wireless Networks." Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0010.
Повний текст джерелаThe constant evolution of wireless technologies such as Wi-Fi, mobile networks standards or IoT, has given rise to new applications and usages. The possibilities offered by this multitude of alternatives are exploited by heterogeneous wireless networks which, by combining within a single network several technologies, provide the users with a seamless access to complementary services. However, to take full advantage of these benefits, there are several technical issues to address. One of them is related to the deployment of these multi-technology networks. In practice, this task relies, most of the time, on radio network design software to achieve optimal planning. In such context, the main objective of this thesis is to establish models which can be used by radio network planning tools in order to the deployment of multi-technology wireless local area networks. This task has involved calibrating propagation models for radio coverage estimation, in residential indoor environments from 800 MHz to 60 GHz; developing a throughput model for Wi-Fi capacity estimation based on uplink and downlink traffic; and establishing a multi- objective resolution model to optimize the positioning of access points operating at 5 and 60 GHz. Moreover, this thesis also proposes practical recommendations for a better positioning of access points during deployment phases. This task has been achieved through coverage sensitivity studies to various factors, such as the transmitter surroundings or the presence of obstructing people
Lee, Sungjoon. "A Cell Transmission Based Assignment-Simulation Model for Integrated Freeway/Surface Street Systems /." Connect to this title online, 1996. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1103731343.
Повний текст джерелаVelan, Shane M. "The cell-transmission model, a new look at a dynamic network loading model." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ55479.pdf.
Повний текст джерелаRohde, Jannis [Verfasser]. "Modellerweiterungen des Cell Transmission Model (CTM) für städtische Hauptstraßennetze / Jannis Rohde." Aachen : Shaker, 2017. http://d-nb.info/1138177830/34.
Повний текст джерелаMa, Zhiwen. "A combined differential and integral model for high temperature fuel cells." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/15831.
Повний текст джерелаRohde, Jannis Verfasser], and Bernhard [Akademischer Betreuer] [Friedrich. "Modellerweiterungen des Cell Transmission Model (CTM) für städtische Hauptstraßennetze / Jannis Rohde ; Betreuer: Bernhard Friedrich." Braunschweig : Technische Universität Braunschweig, 2017. http://d-nb.info/1175817988/34.
Повний текст джерелаSeybold, Christoph. "Calibration of fundamental diagrams for travel time predictions based on the cell transmission model." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118577.
Повний текст джерелаRohde, Jannis [Verfasser], and Bernhard [Akademischer Betreuer] Friedrich. "Modellerweiterungen des Cell Transmission Model (CTM) für städtische Hauptstraßennetze / Jannis Rohde ; Betreuer: Bernhard Friedrich." Braunschweig : Technische Universität Braunschweig, 2017. http://nbn-resolving.de/urn:nbn:de:gbv:084-17010515066.
Повний текст джерелаIzuagbe, Rhys E. "A prostate cell line model of persistent Zika virus infection." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/129570/1/Rhys_Izuagbe_Thesis.pdf.
Повний текст джерелаCasturi, Ramakrishna. "A Macroscopic Model for Evaluating the Impact of Emergency Vehicle Signla Preemption on Traffic." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/32403.
Повний текст джерелаMaster of Science
Sandin, Mats, and Magnus Fransson. "Framework for Calibration of a Traffic State Space Model." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-85342.
Повний текст джерелаZhao, Lingyin. "Generalized Frequency Plane Model of Integrated Electromagnetic Power Passives." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/27692.
Повний текст джерелаPh. D.
Shirke, Chaitrali Dipak. "An extended cell transmission model for arterial traffic and its application to design a robust signal plan." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/135993/1/Chaitrali%20Dipak_Shirke_Thesis.pdf.
Повний текст джерелаSuphaphiphat, Karunasinee. "Anti-viral immune response in the semen of cynomolgus macaques and inhibition of cell to cell transmission by broadly neutralizing antibodies in an SIV/SHIV model of infection SHIV162P3 transmission by semen 1 leukocytes is efficiently 2 inhibited by broadly neutralizing antibodies." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS599.
Повний текст джерелаHIV-1 sexual transmission occurs mostly through contaminated semen, which contains both free virions and infected leukocytes. Moreover, factors in seminal plasma (SP) can influence both semen infectivity and host’s response. Therefore, we used the experimental model of Simian Immunodeficiency Virus (SIV) infection of macaques, to investigate semen cells infectivity and the antiviral immune responses and to evaluate the potency of broadly neutralizing antibodies (bNAbs) to block cell-to-cell virus transmission.In SIVmac251 infected cynomolgus macaques, we investigated SIV-specific innate and adaptive responses in semen, including CD8+ T cell response, humoral response and levels of cytokines, chemokines and growth factors. SIV infection induced pro-inflammatory and immunoregulatory cytokines in semen and a concomitant upregulation of activated CD69+ CD8+ T cells and CCR5+ CXCR3+ CD8+ T cells. Neither SIV-specific CD8+ T-cell responses nor humoral responses controlled seminal viral shedding. Failure to control viral replication in SIV-infected semen is related to a general inflammation and immune activation, which possibly mirrors what happen in the male genital tract and which could lead to enhanced HIV/SIV transmission.Moreover, we developed cell-to-cell transmission assays, using either TZM-bl or human PBMC as target cells and SHIV162P3-infected splenocytes and CD45+ semen leukocytes as donor cells, and evaluated bNAbs-mediated inhibition. The bNAb panel included four 1st generation bNAbs and eight 2nd generation bNAbs. A combination of 1st generation bNAbs (2F5+2G12+4E10) was able to efficiently inhibit CAV transmission, while double combination or single bNAbs showed reduced potency. Of note, individual 2nd generation bNAbs inhibited transmission as efficiently as bNAbs combinations. An anti-V3 bNAb has been selected to evaluate its potential to block cell-to-cell transmission in vivo
Maluš, Miroslav. "Komplexní model turbulence pro různé velikosti cel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442416.
Повний текст джерелаYin, Weihao. "Link State Relationships under Incident Conditions: Using a CTM-based Dynamic Traffic Assignment Model." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/44304.
Повний текст джерелаMaster of Science
Zheng, Hong. "Efficient Algorithms for the Cell Based Single Destination System Optimal Dynamic Traffic Assignment Problem." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195304.
Повний текст джерелаBernhardsson, Viktor, and Rasmus Ringdahl. "Real time highway traffic prediction based on dynamic demand modeling." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112094.
Повний текст джерелаBernard-Stoecklin, Sibylle. "Role of semen infected leukocytes in HIV mucosal transmission : Experimental model of SIVmac251 infection in Macaca fascicularis." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA114818/document.
Повний текст джерелаHuman Immunodeficiency Virus (HIV) infection mostly spreads by the mucosal route: sexual transmission is the dominant mode of transmission, responsible for between 85% and 90% of cases of infection worldwide. These epidemiological data indicate that semen is one of the major sources of HIV-1 transmission. Semen, like other bodily secretions involved in HIV sexual transmission, contains the virus as two forms: cell-free viral particles and cell-associated virus, mostly in infected leukocytes. Although cell-to-cell HIV transmission has been extensively described as more efficient, rapid and resistant to host immune responses, very few studies have investigated the role in vivo of infected leukocytes in virus mucosal transmission. One such study has been recently conducted in our lab, and demonstrated that SIV-infected splenocytes are able to transmit infection to female macaques after vaginal exposure. However, all these studies used immune cells from peripheral blood or lymphoid tissues, such as spleen, and none have investigated the capacity of infected leukocytes in semen to transmit the infection in vivo. Indeed, nature, phenotype and infectivity of HIV associated with semen leukocytes may be different from that of HIV from other sources.Therefore, the objectives of this work are, first, to study of semen leukocytes and their dynamics during SIVmac251 infection in detail, then to investigate seminal factors that may influence semen infectiousness, and finally to test semen leukocyte infectivity in vitro and in vivo, using a model of mucosal exposure in cynomolgus macaques.Macaque semen contains all the target cells for HIV/SIV: CD4+ T cells, macrophages and dendritic cells in lower proportions. Semen CD4+ T cells and macrophages display an activation, differenciation and expression of migration markers profile which is typical of mucosal leucocytes. SIV infection induces significant changes in their phenotype and dynamics. Both cell types can be productively infected and are found in the semen at all stages of infection. These observations suggest that semen CD4+ T cells and macrophages may be able to transmit infection after mucosal exposure.If the role of semen infected leukocytes in HIV/SIV mucosal transmission is confirmed in vivo, this mechanism will be important to consider for further preventive strategies design, like microbicides
Dixit, Vinayak. "HURRICANE EVACUATION: ORIGIN, ROUTE AND DESTINATION." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3224.
Повний текст джерелаPh.D.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering PhD
Bernard-Stoecklin, Sibylle. "Rôle of semen infected leukocytes in HIV mucosal transmission : Experimental model of SIVmac251 infection in Macaca fascicularis." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01059796.
Повний текст джерелаShi, Lei Photovoltaics & Renewable Energy Engineering Faculty of Engineering UNSW. "Contact resistance study on polycrystalline silicon thin-film solar cells on glass." Publisher:University of New South Wales. Photovoltaics & Renewable Energy Engineering, 2008. http://handle.unsw.edu.au/1959.4/41425.
Повний текст джерелаDonato, Cristina. "Synaptic identity of neocortical circuits involving Martinotti cells in healthy conditions and in Down syndrome." Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS079.pdf.
Повний текст джерелаNeocortical GABAergic interneurons encompass a vast number of cell types: some innervate the perisomatic region of cortical pyramidal neurons (PNs), whereas others target PN dendrites. Here we studied the alpha5 subunit of the GABAAR, which is believed to contribute significantly to tonic inhibition. We found that, in L 2/3 PNs of mouse somatosensory cortex, alpha5 provides a negligible contribution to tonic inhibition. Conversely, we found that alpha5 is specifically expressed at synapses between the dendrite-targeting interneurons Martinotti cells (MCs) thus indicating that GABAergic transmission through 5-GABAAR subtypes is important for synaptic dendritic inhibition. We also show that the expression of alpha5 is always present only at synapses made by MCs onto PNs. These results suggest alpha5-GABAARs as a molecular signature of specific inhibitory dendritic synapses involving MCs. Importantly, many brain diseases originate from dysfunctions of distinct inhibitory circuits and, in particular, alpha5-KO mice show improved learning: it was shown that the treatment with a highly specific alpha5 inverse agonist rescued learning and memory deficits in Ts65Dn mice, an animal model for Down syndrome (DS). Yet, the actual mechanisms underlying this cognitive rescue at the synaptic and circuit levels are unknown. Our preliminary results indicate that GABAergic synapses from dendrite-targeting MCs are specifically altered in DS. We are defining whether this alteration is circuit-specific. Our results will provide a better understanding of specific circuit alterations in DS, and will likely open new therapeutic avenues to alleviate cognitive impairment of this disease
BONIFACIO, RAFAEL N. "Estudo e desenvolvimento de conjuntos membrana-eletrodos (MEA) para célula a combustível de eletrólito polimérico condutor de prótons (PEMFC) com eletrocatalisadores à base de paládio." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10597.
Повний текст джерелаMade available in DSpace on 2014-10-09T13:59:42Z (GMT). No. of bitstreams: 0
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Jiang, Rui. "Strategies for rapid congestion recovery using ramp metering." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/68096/1/Rui_Jiang_Thesis.pdf.
Повний текст джерелаNassir, Neema. "Optimal Integrated Dynamic Traffic Assignment and Signal Control for Evacuation of Large Traffic Networks with Varying Threat Levels." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/297042.
Повний текст джерелаCebrecos, Ruiz Alejandro. "Transmission, reflection and absorption in Sonic and Phononic Crystals." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/56463.
Повний текст джерела[ES] Los cristales fonónicos son materiales artificiales formados por una disposición periódica de inclusiones en un medio, pudiendo ambos ser de carácter sólido o fluido. Controlando la geometría y el contraste de impedancias entre los materiales constituyentes se pueden controlar las propiedades dispersivas de las ondas. Cuando una onda propagante se encuentra un medio con diferentes propiedades físicas puede ser transmitida y reflejada, en medios sin pérdidas, pero también absorbida, si la disipación es tenida en cuenta. La presente tesis está dedicada al estudio de diferentes efectos presentes en cristales sónicos y fonónicos relacionados con la transmisión, reflexión y absorción de ondas, así como el desarrollo de una técnica para la caracterización de sus propiedades dispersivas, descritas por la estructura de bandas. En primer lugar, se estudia el control de la propagación de ondas en transmisión en sistemas conservativos. Específicamente, nuestro interés se centra en mostrar cómo los cristales sónicos son capaces de modificar la dispersión espacial de las ondas propagantes, dando lugar al control del ensanchamiento de haces de sonido. Haciendo uso de las curvas de dispersión espacial extraídas del análisis de la estructura de bandas, se predice primero la difracción nula y negativa de ondas a frecuencias cercanas al borde de la banda, resultando en la colimación y focalización de haces acústicos en el interior y detrás de un cristal sónico 3D, y posteriormente se demuestra mediante medidas experimentales. La eficiencia de focalización de un cristal sónico 3D está limitada debido a las múltiples reflexiones existentes en el interior del cristal. Para superar esta limitación se consideran estructuras axisimétricas trabajando en el régimen de longitud de onda larga, como lentes de gradiente de índice. En este régimen, las reflexiones internas se reducen fuertemente y, en configuración axisimétrica, la adaptación de simetría con fuentes acústicas radiando haces de sonido incrementa la eficiencia drásticamente. Además, la teoría de homogenización puede ser empleada para modelar la estructura como un medio efectivo con propiedades físicas efectivas, permitiendo el estudio del frente de ondas en términos refractivos. Se mostrará el modelado, diseño y caracterización de un dispositivo de focalización eficiente basado en los conceptos anteriores. Considérese ahora una estructura periódica en la que uno de los parámetros de la red, sea el paso de red o el factor de llenado, cambia gradualmente a lo largo de la dirección de propagación. Los cristales chirp representan este concepto y son empleados aquí para demostrar un mecanismo novedoso de incremento de la intensidad de la onda sonora basado en un fenómeno conocido como reflexión "suave". Este incremento está relacionado con una ralentización progresiva de la onda conforme se propaga a través del material, asociado con la velocidad de grupo de la relación de dispersión local en los planos del cristal. Un modelo basado en la teoría de modos acoplados es propuesto para predecir e interpretar este efecto. Se observan dos fenómenos diferentes al considerar pérdidas en estructuras periódicas. Por un lado, si se considera la propagación de ondas sonoras en un array periódico de capas absorbentes, cuyo frente de ondas es paralelo a los planos del cristal, se produce una reducción anómala en la absorción combinada con un incremento simultáneo de la reflexión y transmisión a las frecuencias de Bragg, de forma contraria a la habitual reducción de la transmisión, característica de sistemas periódicos conservativos a estas frecuencias. En el caso de la misma estructura laminada en la que se cubre uno de sus lados mediante un reflector rígido, la incidencia de ondas sonoras desde un medio homogéneo, cuyo frente de ondas es perpendicular a los planos del cristal, produce un gran incremento de la fuerza de
[CAT] Els cristalls fonònics són materials artificials formats per una disposició d'inclusions en un medi, ambdós poden ser sòlids o fluids. Controlant la geometría i el contrast d'impedàncies dels seus materials constituents, és poden controlar les propietats dispersives de les ondes, permetent una gran varietatde fenòmens fonamentals interessants en el context de la propagació d'ones. Quan una ona propagant troba un medi amb pèrdues amb propietats físiques diferents es pot transmetre i reflectir, però també absorbida si la dissipació es té en compte. Aquests fenòmens fonamentals s'han explicat clàssicament en el context de medis homogenis, però també ha sigut un tema de creixent interés en el context d'estructures periòdiques en els últims anys. Aquesta tesi doctoral tracta de l'estudi de diferents efectes en cristalls fonònics i sònics lligats a la transmissió, reflexió i absorció d'ones, així com del desenvolupament d'una tècnica de caracterització de les propietats dispersives, descrites mitjançant la estructura de bandes. En primer lloc, s'estudia el control de la propagació ondulatori en transmissió en sistemes conservatius. Més específicament, el nostre interés és mostrar com els cristalls sonors poden modificar la dispersió espacial d'ones propagants donant lloc al control de l'amplària per difracció dels feixos sonors. Mitjançant les corbes dispersió espacial obtingudes de l'anàlisi de l'estructura de bandes, es prediu, en primer lloc, la difracció d'ones zero i negativa a freqüències próximes al final de banda. El resultat és la collimació i focalització de feixos sonors dins i darrere de cristalls de so. Després es mostra amb mesures experimentals. L'eficiència de focalització d'un cristall de so 3D està limitada per la gran dispersió d'ones dins del cristall, que és característic del règim difractiu. Per a superar aquesta limitació, estructures axisimètriques que treballen en el règim de llargues longituds d'ona, i es comporten com a lents de gradient d'índex. En aquest règim, la dispersió es redueix enormement i, en una configuració axisimètrica, a causa de l'acoblament de la simetría amb les fonts acústiques que radien feixos sonors, l'eficiència de radiació s'incrementa significativament. D'altra banda, la teoria d'homogeneïtzació es pot utilitzar per a modelar, dissenyar i caracteritzar un dispositiu eficient de focalització basat en aquests conceptes. Considerem ara una estructura periòdica en la qual un dels seus paràmetres de xarxa, com ara la constant de xarxa o el factor d'ompliment canvia gradualment al llarg de la direcció de propagació. Els cristalls chirped representen aquest concepte i s'utilitzen ací per a demostrar un mecanisme nou d'intensificació d'ones sonores basat en el fenòmen conegut com a reflexió "suau". La intensificació està relacionada amb la alentiment progressiva de l'ona conforme propaga al llarg del material, que està associada amb la velocitat de grup de la relació de dispersió local en els diferents plànols del cristall. Es proposa un model basat en la teoria de modes acoblats per a predir i interpretar este efecte. Dos fenòmens diferents cal destacar quan es tracta d'estructures periòdiques amb dissipació. Per un costat, al considerar la propagació d'ones sonores en el plànol en un array periòdic de capes absorbents, s'observa una disminució anòmala de l'absorció i es combina amb un augment simultani de reflexió i transmissió en les freqüències de Bragg que contrasta amb la usual disminució de transmissió, característica dels sistemes conservatius a eixes freqüències. Per a un medi similar de capes, amb un reflector rígid darrere, les ones fora del pla incidint l'estructura des de un medi homogeni, augmentaran considerablement la interacció. En altres paraules, el retràs temporal de les ones sonores dins del sistema periòdic augmentarà significativament produint un augmen
Cebrecos Ruiz, A. (2015). Transmission, reflection and absorption in Sonic and Phononic Crystals [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/56463
TESIS
Premiado
Koon, Alex C. "Autoregulatory and Paracrine Control of Synaptic and Behavioral Plasticity by Dual Modes of Octopaminergic Signaling: A Dissertation." eScholarship@UMMS, 2011. https://escholarship.umassmed.edu/gsbs_diss/572.
Повний текст джерелаMeiar, Alain. "Le Business Model de l’entreprise transmise : comparaison de la représentation du repreneur avec celle du cédant pour contribuer à réduire le risque de faux pas." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0140/document.
Повний текст джерелаAccording to the report of the European Commission (2011), owner-manager departures lead too often to the demise of the firm. Faced with the worrying growth of this phenomenon, little research has been conducted on non-family business successions (Durst et Wilhelm, 2009 ; Parker et van Praag, 2012) while fewer and fewer descendants are willing to take on the succession (TRANSREGIO, 2005), little research has been conducted on non-family business succession (Durst & Wilhelm, 2009). One of the main challenges faced by the buyer (individual) is to rapidly learn and understand a complex system which is going to be under his or her guidance. Our research brings to light the risk of faux pas which we define as a decision of the buyer which goes against the ordinary working of the firm, without the buyer being aware of it. Our research protocol formalises the buyer’s representation regarding the Business Model of the firm he buys to compare it with the seller’s one. This comparison reveals types of deviations likely to lead to faux pas.After an exploratory investigation, four cases of business transfer have been studied using a semi-structured checklist allowing us to produce a written version of the Business Models. For each case, a systematic comparison of the buyer’s and the seller’s representations allowed us to draw some conclusions bringing to light five situations: shortcomings, discordance, concordance, superiority and different models
Berrebi, Johanna. "Contribution à l'intégration d'une liaison avionique sans fil. L'ingénierie système appliquée à une problématique industrielle." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00800141.
Повний текст джерелаHsieh, Chih-Wei, and 謝志偉. "Mixed Traffic Cell Transmission Models: Development and Validation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59560630115708678716.
Повний текст джерела國立交通大學
交通運輸研究所
98
Cell transmission model (CTM), proposed by Daganzo (1994; 1995), is a mesoscopic traffic flow model which can efficiently simulate traffic hydrodynamics under various traffic conditions. CTM can provide a convergent approximation to the Lighthill and Whiteham (1955) and Richard (1956) (LWR) models and covers the entire fundamental diagram. Due to its low computation requirements compared with micro-simulation models, CTM is widely applied to simulate the traffic flow behaviors at freeways and signalized intersection. The conventional CTM was designed for pure traffic, i.e. all vehicles are of the same size such as cars on freeways. Incorporation of more realistic CTM rules into the simulation of mixed traffic (various types of vehicles such as cars and motorcycles) on urban streets is comparatively less addressed. However, it is ubiquitous in many Asian urban streets that motorcycles oftentimes move concurrently with the cars by sharing the “same lane”. Some erratic motorcyclists do not even follow the lane disciplines at all. They may make lateral drifts breaking into two moving cars. Once blocked by the front vehicles, they even make wide transverse crossings through the gap of two stationary cars in the same lane, in order to move forward. That is, even the downstream cell is fully occupied by cars, motorcycles can still move forward. These erratic behaviors of motorcycles in the lateral clearance among larger vehicles would definitely increase the storage capacity of a cell. Without considerations of such behaviors and interaction between different sized vehicles, the traffic simulation might obtain a misleading result. Based on this, this study proposes mixed traffic cell transmission models (MCTM) to replicate the behaviors of mixed traffic consisted of cars and motorcycles. Both types of vehicles exhibit rather different traffic behaviors in competing roadway capacity and remaining storage space. Thus, the parameters of the MCTM, including maximal flow rate, maximal storage capacity, and remaining storage capacity, should be dynamically adjusted and allocated between cars and motorcycles according to mixture ratio of vehicles types and the traffic phases – free flow, synchronized, and congested. Based on our field observations, two MCTM models are developed. The first MCTM model uses the ratio of car to motorcycle in the last upstream cell to determine the amount of roadway resources (i.e. capacity and storage capacity) allocated to cars, and vice versa for motorcycles. That is, the larger value of car to motorcycle ratio is, the more advantageous of car in competing the roadway resource is. The second MCTM model further incorporates an entropy index to adjust the traffic speed, since the interferences between two types of vehicles will be rapidly increased as the mixture ratio of cars and motorcycles becomes higher. To validate the proposed MCTM models, videotaping traffic data of three corridors in Taipei city covering a full traffic spectrum from free-flow to congested are collected. Since the traffic behaviors will be significantly affected by the passengers embarking and disembarking maneuvers of bus traffic, to exclude such interactions, the corridors with a bus exclusive lane, Sec. 4, Roosevelt Road, are selected. The results show that the both proposed MCTM models can accurately simulate the traffic flows under various traffic phases and mixture ratios with an average MAPE (mean absolute percentage error) below 30%. The simulation accuracy is also compared spatially (different cells) and temporally (green time vs. red time, off-peak hour vs. peak hour).
Shen, Wei-Ting, and 沈威廷. "A Macro-Micro Mixed Traffic Flow Models based on Cell Transmission Models and Cellular Automaton." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/97c668.
Повний текст джерела國立交通大學
運輸與物流管理學系
105
The macroscopic traffic flow models which account for the flow rate, density or speed of groups of vehicles on the roads, are advantageous to its high efficiency. On the contrary, the microscopic traffic flow models deal with the stimulation terms to spacing or relative speed between individual vehicles and respond to its acceleration or deceleration. The advantage of them lie in describing detailed vehicle behaviors and high accuracy. Therefore, it is necessary to be confronted with a trade-off between efficiency and accuracy when conducting mixed traffic flow models simulation. This study takes the prevailing mixed traffic of cars and motorcycles on urban streets as the background. Firstly, based on the mixed traffic cell transmission models (MCTM), proposed by C.W. Hsieh (2010), to simulate platoons of vehicles with traffic flow transference within segment cells to reduce simulation time. Secondly, based on the cellular automaton and microscopic lane changing principles in mixed traffic, proposed by Lan et al.(2009、2010), to simulate platoons of vehicles with parallel driving and lane changing behaviors in close proximity to the intersection. In order to make these two models stated above integrate properly, this study develops a macro-micro traffic flow models with a transmission interface design, which combines advantages over both models and takes characteristics of mixed traffic into consideration. Moreover, real data of mixed traffic on urban streets is collected. To obtain all the vehicle trajectories in the experimental segment and calculate numbers of vehicles in each cell at each time step through analyzing them. The proposed model in different scenarios is assumed and divided into seven kinds of macro-micro proportions. The efficiency index is measured by CPU time and accuracy index is by SMAPE values to validate the proposed model. This study puts emphasis on the simulation effectiveness of interfaces in different positions of the segment and tries to find out the best one. The results demonstrate that the macroscopic traffic flow models is conductive to reduce the simulation time and improve efficiency. The microscopic traffic flow models make for accuracy. Under a balanced of efficiency and accuracy, the best position of the interface measured by simulation effectiveness is thirty to sixty meters apart from the intersection. It is supposed to transfer the model from macroscopic to microscopic before the traffic flow is interrupted.
Stringfellow, Jake David. "Control and modulation of the modular multilevel converter under unbalanced cell power conditions." Thesis, 2020. http://hdl.handle.net/1959.13/1438193.
Повний текст джерелаThis thesis presents a control and modulation scheme for the Modular Multilevel Converter under unbalanced power conditions. The modular multilevel converter is a relatively new converter topology and since its introduction has garnered interest in both literature and industry for its applications in High Voltage DC transmission. Whilst the majority of the published work has been for traditional applications for the converter, there has been recent interest in new applications for the converter. This includes the use of the converter as a photovoltaic interface, where power sources are directly connected to each converter cell. To maintain operation under a variety of operating conditions, new control and modulation schemes may be required. The thesis presents an energy balancing model based on the production of a number of controlled circulating current components in the converter. This energy model allows for the decoupling of the power generation in each arm, resulting in independent control of the arm voltages, and the compensation for large unbalanced power production across the converter. A model based deadbeat current controller is developed to control the converters output and circulating currents. A new heuristic model predictive control based modulation scheme is proposed to allow for the operation of each converter cell at separate references while generating the desired arm voltages. This is achieved while providing a balance between switching transitions and the spread of cell voltages from their references in each converter arm. Simulation and experimental results are presented to validate the performance and functionality of the proposed control and modulation scheme. It was found that the control scheme provides for the ability to maintain stable converter operation with large varied powers across all converter cells while maintaining balanced output powers and low device switching frequencies.
Yu, Chih-Han, and 游智涵. "Multi-Lanes Mixed Traffic Cell Transmission Model." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/62295c.
Повний текст джерела國立交通大學
運輸與物流管理學系
104
Mixed traffic cell transmission model (MCTM) can efficiently combine cell transmission model (CTM) with the behaviors of mixed traffic consisting of cars and motorcycles. The MCTM is restricted by the limitation of the homogeneous cell, it cannot describe the discrepancy between each lane on urban roads. Based on this, this study proposes multi-lanes mixed traffic cell transmission model to describe the lane difference on urban roads. Because the lane difference can be classified by turn-movement and vehicle type, the multi-lanes mixed traffic cell transmission model treat each turn-movement and vehicle type as one unit from the upstream of the road. The model combines with macro lane-changing function while the traffic propagation, and does the traffic discharge by each lane at the downstream of the road. Based on the field observations, the lane-changing is affected by signal, density and the difference of density at the downstream; the lane-changing is affected by turn-movement and vehicle type at the upstream. To validate the proposed model, videotaped traffic data in Hsinchu city are collected. The results show that the gap between the real data and the simulated data are the error percentage of the travel time of each car is 28% and the error percentage of the travel time of each motorcycle is 28%.
Chen, Chen-You, and 陳俊佑. "The Validation of the Cell Transmission Model." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/26918065526545218238.
Повний текст джерела國立成功大學
交通管理學系碩博士班
97
The Flow Theory can be divided into three categories- macroscopic, mesoscopic and microscopic model. The Cell Transmission Model (CTM) in this study can be attributed to the mesoscopic model. The roads in the CTM are divided equally into consecutive sections by the distance a car runs with free flow speed at unit time. CTM defines the cell as equal length section or homogeneous section of the roads. Controlling the flow on the roads by means of capacities set for the cell is the main feasure of CTM. Most studies related to CTM were conducted abroad and aimed on the flow of free way. On the contrary, the similar studies related to CTM conducted domestically are quite few, not to mention the study aimed on the flow of signalized network in the urban area and using real time flow data for validation. This research attempts to conduct a CTM simulation program using MATLAB. The related information such as car generation rate and split ratio, which simulation needed as input data are generated by the dynamic traffic assignment software- DynaTAIWAN. The SanMing Section Network of Kaohsiung City (consists of five intersections and five sets of signals along Jiuru second Road and Minzu road) is selected as target sample for validation. All the comparisons of validation are on the basis of the data, realistic flow volume at the intervals of 7 AM to 9 AM of 9 consecutive Thursday starting from January 2009, collected by the Vehicle Detectors (VD) installed in the SanMing Section Network by the Municipal Transportation Bureau of Kaohsiung City. Both MAPE, RMSE are chosen to be the measure criteria of the study. Neglecting the volume data collected on January 29th, the fourth day of Chinese Lunar New Year, which is abnormally low, most comparisons of validation, for the VD data from 8 out of 9 sample Thursdays, are between 20% and 50% based on MAPE and less than 50% based on RMSE, and perform a reasonable or almost excellent forecast. Furthermore, the excellent performance showed on March 5th and March 12th, the comparisons of validation of both days’ VD data are less than 30% based on MAPE. The outcomes resulted from both criteria show that CTM equals to reason on the volume of signalized network in the urban area of Taiwan.
Xie, Bo-Yang, and 謝博仰. "Simulation of Urban Traffic Congestion Strategies Using Cell Transmission Model." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9rjemn.
Повний текст джерела國立宜蘭大學
電機工程學系碩士班
107
In recent years, urban transportation has developed rapidly, traffic congestion and traffic incidents under a limited road area have resulted in fuel consumption and increased human travel time. However, a lot of traffic congestion methods have been proposed. In this study, we propose two-level traffic congestion control strategies which according to the order of formation of traffic jams, are classified into three areas: A, B, and C to prevent traffic jams caused by accidents: (1) ban light is used to stop vehicles from driving in the direction of an accident, and (2) warning light is used to guide vehicles not to drive in the direction of an accident zone. In addition, we simulate a two-way traffic network by using CTM (Cell Transmission Model). In the road network simulation, we construct an 8 by 8 format traffic network model. All the vehicles entering the model are inferred from the distribution equation of the CTM in the road network, and all the routes in the road network are collected. Vehicle parameters include traffic density and congestion lane values. We also verify the effectiveness of our control strategy on the two-way traffic network. The simulation results show that are three key parameters can influence the traffic jams such as: the control strategy starting time, the rate of vehicle routes changed and the traffic density. Simulation results show our traffic congestion strategy is useful in urban traffic network systems.
Liou, Fong-You, and 劉峰佑. "A Study on Ramp Metering Control with the Cell Transmission Model." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42972581312318447719.
Повний текст джерела逢甲大學
交通工程與管理所
97
For the increasing of the traffic volume, the freeway management needs to use real time traffic information to estimate the variations of the traffic flow and then solve the congestion in the freeway systems. Freeway systems need a good traffic flow model to calculate the most suitable ramp metering. We present the field data collected on National Freeway No.1, the section from Sanyi to Miaoli, and Changhua to Puyan. The data is reorganized to include 20 second interval and 556 meter cell-length. The occupancy of the vehicle detector data is extracted to be applied for the proposed model. Then, the occupancies are converted into the car-in- the-cell to satisfy the application for using CTM. The results show that the Mean Absolute Percentage Error (MAPE) of the CTM falls into a reasonable range. However, the errors of the MAPE are increased while the cells are located at on-ramp and off-ramp or the time is between 18 to 19. Furthermore, we use the CTM at meter control. We analyze the density while the Level of Service (LOS) is classified as A and B, and used them to calculate the on-ramp metering. Finally, we used TSIS to analyze the Measure of Effectiveness (MOE) for on-ramp meter. The results show that under moderate to high congested traffic flow, the CTM could accurately estimate vehicles at the on-ramp metering. And increase the on-ramp metering in the low traffic flow. We tested the on-ramps in Nantun and Changhua, and the testing results are in accordance with the simulation values.
Ti-ChenTsai and 蔡滌塵. "Applying the Cell Transmission Model and Estimated Turning Proportions for Adaptive Signal Control Logic." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19734545490988969587.
Повний текст джерела國立成功大學
交通管理學系碩博士班
101
Traffic signal control has become the most important issue in urban traffic management. Traffic congestion occurs when pre-timed signal control could not meet the actual demand, such as inappropriate signal timing or discontinued phases in arterials. Adaptive signal control logic obtains traffic flow data from vehicle detectors. According to the traffic prediction model and control logic, adaptive control calculates optimal signal decisions which could reduce delay and stops. This research has developed three models from Taiwanese adaptive control logic called COMDYCS-3E, which includes turning proportion estimation model, traffic prediction with cell transmission model (CTM), and six steps timing decision process. We used Signal Control API from VISSIM software to establish adaptive signal control logic, and measured the performance by simulating in VISSIM environment. After the traffic experiment of urban arterial, results showed that the RMSE of turning proportion estimation model is about 0.07. And adaptive signal control logic improves more than 5% system delay against pre-timed and fully actuated signal control.
Van, Graan Sebastian Jan. "Network configuration improvement and design aid using artificial intelligence." Diss., 2008. http://hdl.handle.net/2263/27625.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2008.
Electrical, Electronic and Computer Engineering
unrestricted
Chih-WeiYeh and 葉志韋. "An Enhanced Cell Transmission Model for Establishing an Adaptive Signal Control Logic under Mixed Traffic Flow Conditions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/t65txx.
Повний текст джерела國立成功大學
交通管理科學系
102
This research is to develop an adaptive signal control logic under mixed traffic flow conditions. There are two objectives: (1) develop a traffic prediction model under mixed traffic flow condition which is proper to adaptive signal control logic, (2) Measure the performance of the adapative signal control logic. The traffic prediction model is called enchanced cell transmission model (enhanced CTM) developed by observing both real vehicle driving behavior and simulation result in VISSIM software. This model fits some traffic condition such as permissive motorcycle lane, motorcycle-stopping area, left-turn protect phase, and etc. The experiment result of this model shows the error either car or motorcycle flow in a certern place on the road in a two-second time interval is less than one unit. The adaptive signal control logic is constructed from the traffic prediction model this research developed, turning proportion estimate model, and six-step timing decision process under a structure from a Taiwanese adaptive signal control logic called COMDYCS-3E. The result experiment in VISSIM environment shows that the adaptive signal control logic has better performance compared with either pre-timed signal control or actuated control especially under a varied volume scenario. This research develop a traffic prediction model under mixed traffic flow condition with a well prediction ability. This model is also applied to an adaptive signal control logic, and the performance of signal control is better than other control method.
Chang, Yu-Ming, and 張育銘. "Investigation of Niobium Oxide Blocking Layer on the Suppression of Recombination at Anodic Interface in Dye Sensitized Solar Cells by Transmission Line Model in Impedance Analysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/73799378833348870079.
Повний текст джерела國立清華大學
化學工程學系
102
Creating a unidirectional electron transport is one of the key factors of reaching high power energy conversion efficiency in dye-sensitized solar cell. Unfortunately, undesired electron pathway called recombination exists in real devices. The recombination causes photocurrent loss and mainly occurs at TiO2/electrolyte as well as FTO/electrolyte interface. Herein we focus on retarding the recombination at latter interface by using Nb2O5 blocking layer. Owing to slightly higher conduction band position of Nb2O5 comparing to TiO2, which can suppress charge recombination and enhance power conversion efficiency. In this study, the Nb2O5 blocking layer was prepared by the spin coating 5mM niobium ethoxide ethanol solution on FTO substrate. The film was then characterized by X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS) and transmission electron microscopy (TEM), which indicated a small part of TT-phase crystalline was formed. The uniformity of such blocking layer was scrutinized by optical microscope (OM) and scanning electron microscope (SEM). UV/Vis spectroscope was used to determine the transmittance of so-prepared Nb2O5 thin film on FTO. Band structure was positioned by XPS and UV/Vis spectroscope. In order to evaluate the recombination extent, the electrochemical impedance spectroscopy with transmission line model was employed and the recombination resistance (Rct) can be obtained. At low forward bias, considering the same condition as low-sun irradiation, recombination takes place primarily at FTO/electrolyte interface. In the case of volatile electrolyte based devices, the Rct with the Nb2O5 blocking layer increases 3 times higher than the blank one. As non-volatile electrolyte was applied, more significant effect could be observed for 14 times improvement in Rct value in the device fabricated with this Nb2O5 blocking layer. As the result, the Nb2O5 blocking layer could suppress the recombination at FTO/electrolyte interface, especially under low-sun condition. An increase in power conversion efficiency from 11.1% to 11.8% and 7.87% to 8.53% were obtained in volatile and non-volatile electrolyte based devices, respectively. This research reveals the importance of blocking effect under low illumination, which is the crucial issue of indoor application for DSSC and this niobium oxide thin film acts as a remarkable blocking layer.
Wang, Renxiang. "Lithium Ion Battery Failure Detection Using Temperature Difference Between Internal Point and Surface." 2011. http://hdl.handle.net/1805/2979.
Повний текст джерелаLithium-ion batteries are widely used for portable electronics due to high energy density, mature processing technology and reduced cost. However, their applications are somewhat limited by safety concerns. The lithium-ion battery users will take risks in burn or explosion which results from some internal components failure. So, a practical method is required urgently to find out the failures in early time. In this thesis, a new method based on temperature difference between internal point and surface (TDIS) of the battery is developed to detect the thermal failure especially the thermal runaway in early time. A lumped simple thermal model of a lithium-ion battery is developed based on TDIS. Heat transfer coefficients and heat capacity are determined from simultaneous measurements of the surface temperature and the internal temperature in cyclic constant current charging/discharging test. A look-up table of heating power in lithium ion battery is developed based on the lumped model and cyclic charging/discharging experimental results in normal operating condition. A failure detector is also built based on TDIS and reference heating power curve from the look-up table to detect aberrant heating power and bad parameters in transfer function of the lumped model. The TDIS method and TDIS detector is validated to be effective in thermal runaway detection in a thermal runway experiment. In the validation of thermal runway test, the system can find the abnormal heat generation before thermal runaway happens by detecting both abnormal heating power generation and parameter change in transfer function of thermal model of lithium ion batteries. The result of validation is compatible with the expectation of detector design. A simple and applicable detector is developed for lithium ion battery catastrophic failure detection.