Dissertationen zum Thema „Isolation de la table de flux“
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Yang, Ye. „Isolation Mechanisms within the vSwitch of Cloud Computing Platform“. Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS191.
Der volle Inhalt der QuelleAs an important component of cloud platform, virtual switch (vSwitch) is responsible for achieving network connectivity between virtual machines (VMs) and external devices. Most existing vSwitches adopt the split design principle, which destroys the isolation between VMs. In vSwitch, different VMs compete for shared resources and unrestricted memory access, making them unable to guarantee stable network quality of service (QoS), while facing the risk of data plane attacks and illegal access to memory. In order to solve these performance, failure and security problems caused by the lack of isolation, the main works and contributions of this thesis are as follows: 1) Network QoS method based on CPU cycle isolation (C2QoS). This approach secures VM network bandwidth by isolating concurrency from CPU resources, and at the same time reduces additional VM network latency caused by concurrency by 80%. 2) Data plane attack defense mechanism based on stream table isolation (D-TSE). D-TSE uses VM as the unit to separate the flow table structure to achieve independent packet classification performance and fault isolation at the cost of 5% additional CPU usage. 3) Virtualized Network I/O (VNIO) mechanism based on Memory Access Isolation (S2H). Based on a secure memory sharing model, S2H provides VM memory isolation and security at the cost of 2-9% increased latency
Tanase, Aurelian. „Improved methodology for deriving the critical heat flux look-up table“. Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27923.
Der volle Inhalt der QuelleCui, Xingdong. „Prediction of critical heat flux in bundles using tube look-up table“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0002/MQ28415.pdf.
Der volle Inhalt der QuelleKalpakci, Volkan. „Seismic Isolation Of Foundations By Composite Liners“. Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615500/index.pdf.
Der volle Inhalt der QuelleTogbe, Maurras Ulbricht. „Détection distribuée d'anomalies dans les flux de données“. Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS400.
Der volle Inhalt der QuelleAnomaly detection is an important issue in many application areas such as healthcare, transportation, industry etc. It is a current topic that tries to meet the ever increasing demand in different areas such as intrusion detection, fraud detection, etc. In this thesis, after a general complet state of the art, the unsupervised method Isolation Forest (IForest) has been studied in depth by presenting its limitations that have not been addressed in the literature. Our new version of IForest called Majority Voting IForest improves its execution time. Our ADWIN-based IForest ASD and NDKSWIN-based IForest ASD methods allow the detection of anomalies in data stream with a better management of the drift concept. Finally, distributed anomaly detection using IForest has been studied and evaluated. All our proposals have been validated with experiments on different datasets
Downey, Jennifer. „Identification and isolation of multipotent stromal cells from human skeletal muscle“. Mémoire, Université de Sherbrooke, 2013. http://hdl.handle.net/11143/6296.
Der volle Inhalt der QuelleSimon, Rodrigue. „Dynamique des flux commerciaux dans le secteur des oeufs de table et analyse des effets de la libéralisation des échanges“. Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28746/28746.pdf.
Der volle Inhalt der QuelleZhang, Zhi, und Zhi Zhang. „Analytical Investigation of Inertial Force-Limiting Floor Anchorage System for Seismic Resistant Building Structures“. Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625385.
Der volle Inhalt der QuelleEl, Ayari Tahani. „Barrières au flux génique en Méditerranée Occidentale : étude de la différenciation génétique chez deux mollusques marins, Mytilus galloprovincialis & Stramonita haemastoma“. Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS226/document.
Der volle Inhalt der QuellePopulation genetics has revealed the genetic diversity of marine species is often subdivided into a mosaic of discrete patches, within which populations are genetically homogeneous, delineated by discontinuities called barriers to gene flow. The aim of this thesis was to contribute to better understand the processes explaining the origin, maintenance and location of genetic barriers at the Atlantic/Mediterranean transition zone. First, we studied the genetic structure of the mussel Mytilus galloprovincialis. In contrast to the abrupt narrow cline reported in Spain, we discovered along the Algerian coastline a 600 km wide mosaic hybrid zone eastward of the Almeria-Oran oceanic front. Second, we studied the genetic structure of a marine gastropod Stramonita haemastoma. We discovered two cryptic lineages differentially fixed for alternative mitochondrial haplogroups, and differentiated at three microsatellite markers developed in this PhD work. Surprisingly, the spatial distribution proved to be an unusual mosaic with a patch of the Atlantic lineage enclaved in the north of the Western Mediterranean Sea, bordered in the South by a hybrid zone in eastern Spain around Valencia. These two studies highlight the importance of intrinsic reproductive isolation in explaining the mosaic distribution of the marine genetic diversity. Although boundaries between patches coincide with physical barriers to dispersal or ecotones, hydrography and environment mainly explain the position of the genetic discontinuities but neither their origin nor their maintenance
Duvaux, Ludovic. „Déterminants historiques et sélectifs des échanges génétiques au cours de la spéciation chez la souris domestique : patrons de coalescence et introgression en zone hybride“. Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20116/document.
Der volle Inhalt der QuelleUnderstanding the speciation process requires to appraise patterns of gene flow between incipient speices as well as the role of selection in their determination. This thesis attempts to do so using two subspecies of the house mouse, Mus musculus, as a model. We inferred the history of their differentiation based on sequence polymorphism data at 60 autosomal loci. By simulating the coalescent of these loci under several historical scenarios we were able to infer, using an ABC (Approximate Bayesian Computation) method, an ancient divergence of the subspecies (1.5 MY). This was followed by a long period of isolation (1.2 MY) preceding a phase of genetic exchanges that started well before the formation of the present European hybrid zone. The isolation phase lasted long enough to explain a majority of the present genetic incompatibilities. Ancient and lasting gene flow could have favoured a behavioural reinforcement of reproductive isolation. We a lso studied the relationship between the mode of evolution of 77 autosomal genomic regions and their introgression patterns across a hybrid zone. Local recombination rates variations seem to partly account for the patterns observed at some loci with limited and symmetrical introgression. However such is not the case for 40% of the the loci showing asymmetrical introgression in on direction or the other. domesticus results from a movement of the hybrid zone from domesticus to musculus
Linares, Romain. „Caractérisation, quantification et isolation de vésicules extracellulaires du plasma sanguin à l’aide de nanoparticules d’or ou magnétiques conjuguées à des protéines“. Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0344/document.
Der volle Inhalt der QuelleExtracellular vesicles (EVs) are submicrometric membrane vesicles found in body fluids and produced by cells in response to various stimuli. EVs are involved in numerous physiological processes but also in pathologies as cancers or cardiovascular diseases. Even if EVs are largely studied, our knowledge about them remains limited. This is mainly caused by the difficulties to characterize EVs and by the lack of standardized methods allowing their characterization. The first part of my PhD work focused on the development and optimization of a protein thiolation method. Antibodies modified to expose few thiols were conjugated to gold nanoparticles functionalized with maleimides. The binding of thiolated antibodies to gold nanoparticles was quantitatively studied and optimal conjugation conditions were determined using biochemical methods. The second part of my PhD work concerned the characterization of blood plasma EVs from healthy subjects using transmission electron microscopy (TEM). EVs morphology, size and phenotype were determined by cryo-TEM combined with labelling with protein-conjugated gold nanoparticles. The near-absolute quantification of blood plasma EVs was achieved using an original TEM method based on the direct sedimentation of EVs onto TEM grids. The third part of this study consisted in developing an EV isolation method using AnxA5-conjugated magnetic particles. Conditions allowing total extraction of blood plasma phosphatidylserine-exposing EVs were determined using flow cytometry (FC). This study presents a detailed characterization of blood plasma EVs from healthy subjects and can serve as a reference for future studies on EVs contained in pathological plasmas or other body fluids
Guabtni, Adnene. „Sphères de comportement pour la modélisation et l'exécution de procédés flexibles“. Phd thesis, Université Henri Poincaré - Nancy I, 2007. http://tel.archives-ouvertes.fr/tel-00605692.
Der volle Inhalt der QuelleLazrek-Ben, Friha Fatma. „Analyse de la diversité génétique et symbiotique des populations naturelles tunisiennes de Medicago truncatula et recherche de QTL liés au stress salin“. Toulouse 3, 2008. http://thesesups.ups-tlse.fr/384/.
Der volle Inhalt der QuelleThe objective of this thesis is to study genetic diversity within 136 lines belonging to Tunisian 10 natural populations of M. Truncatula. These populations come from different soil and climatic conditions, representative of the Tunisian territory. The first part consists of an analysis at the molecular level by the use of 18 microsatellites spread over different linkage groups. That helped to structure populations depending to a north / south axis separated by the Tunisian Dorsale. The parameter rainfall is the most important factor influencing this structure. Similarly, using morphological markers, we tried to deepen the characterization of populations and to make comparison with that obtained by microsatellites. In the second part, we continued the analysis of the diversity by the study of the variability of a number of lines under nitrogen assimilation or in symbiosis with different strains of Rhizobium, in the presence or absence of salt stress. Based on this analysis, it was possible to select pairs of contrasting lines for their response to salt in those two conditions studied, which have enabled us to identify criteria for salt tolerance. The last part involves a quantitative analysis which aimed primarily to identify markers involved in salt tolerance in the plant partner. . .
Mallet, Bertrand. „Rôle des facteurs écologiques dans le processus de spéciation en milieu insulaire. Effet de l'habitat et des pollinisateurs sur la diversification du faham (Jumellea spp., Orchidaceae) aux Mascareignes“. Thesis, La Réunion, 2014. http://www.theses.fr/2014LARE0020/document.
Der volle Inhalt der QuelleMechanisms responsible for the establishment of reproductive isolation are little studied in island adaptive radiations. According to the theory of ecological speciation, reproductive isolation results from the ecologically-based divergent selection. By their unique characteristics, oceanic islands are ideal systems to study the role of ecological factors in the diversification of endemic lineages. This study focuses on the role of habitat and pollinators in restricting inter and intraspecific gene flow between populations of faham (Jumellea spp.), an orchid endemic to Mascarene Islands. To do this, patterns of phenotypic differentiation (floral traits), environmental differentiation (habitat, altitude, climate) and genetic differentiation (nuclear microsatellites) were compared. At the intraspecific level, the results show that gene flow restriction is mainly due to the colonization of different habitat types with no obvious role of pollinators. At the interspecific level, in addition to the role of habitat, pollinator shift seems to explain effective complete reproductive isolation. By placing these results into the continuum of speciation, it appears that reproductive isolation evolve initially in response to adaptation to different habitats and, in a second phase, would be enhanced by pollinator-driven divergent selection. Operationally, this study reviews the taxonomy of faham and proposes to define management units and priorities in terms of conservation
Bou, Khalil Yaacoub Jacques. „Nouvelles stratégies d'isolement et de caractérisation des microorganismes intracellulaires associés aux amibes“. Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM5013.
Der volle Inhalt der QuelleAmoebae are predators without distinction and they can also act as hosts to several different microorganisms that may coexist simultaneously. Some protozoa are sources of human pathogens where they act as reservoir of any human pathogens like Legionellae, Chlamydiaceae and others. In addition, the first giant virus, Acanthamoeba Polyphaga imivirus, was discovered using Amoeba as cell host. Since then, many other giant viruses have been isolated. For decades, amoebae were used as cell hosts in the culture- based process to isolate microorganisms, and allowed to recover new giant viruses and bacterial species from human and environmental samples. In contrast the co-culture system with protozoa is tedious and fastidious. Microbiologists are limited to routine culture methods, limiting by this the speed of screening potential samples and the efficiency of yielding new isolates. Much effort and improvement were needed. Our work consisted in the development of new strategies and techniques for the isolation of new microorganisms associated to protozoa. In the first part of this work, we described, all the improvements we brought to the protists culture system for the isolation of intracellular microorganisms especially giant viruses and Chlamydiaceae. Major improvements were based on modified culture enrichment steps, adapted culture media, and targeted use of specific drugs. The key of this new strategy was the implementation of high-throughput technologies to the ameliorated culture based systems, and the application of this later to a wide panel of protozoa used as potential host cells. These presented advances and strategies demonstrated significant time saving, and higher sensitivity than older techniques, they considerably increased the potential of collecting new environmental or clinical isolates and also new undiscovered microorganisms especially new giant virus familiesand particular Chlamydiaceae associated to amoebae. We continued to ameliorate the efficiency of the flow cytometric technology by reviewing its contributions to the virology field, then by applying it to the isolation system by sorting the new isolates as a new strategy for better genomic and proteomic analysis. In the second part of this work, we focused on the characterization of new isolates at the level of developmental cycle and genomic description. We used electron microscopy, and genome sequencing as main tools to describe our newly isolated giant viruses but also report new species of Chlamydiaceae and managed to decipher Chlamydiaceae species with a host dependent replication cycle, an issue that has not, thus far, been observed in protozoa-associated Chlamydiaceae. The strategies and results described herein show the importance of pursuing the isolation of new associatedamoebal microorganisms in order to give rise to new insights into the evolution of these microorganisms, their respective biotopes, and their potential or hidden pathogenicity. The more we need to search the more tools are needed, only our lack of imagination and appropriate automated systems will put limits on any needed strategy in the field of microbiology
Bell, Benjamin. „Advancing the application of analytical techniques in the biological chemistry of sporopollenin : towards novel plant physiological tracers in Quaternary palynology“. Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/advancing-the-application-of-analytical-techniques-in-the-biological-chemistry-of-sporopollenin-towards-novel-plant-physiological-tracers-in-quaternary-palynology(59605f2b-642a-4ea9-8921-4c926217e6f2).html.
Der volle Inhalt der QuelleLin, Ho-Jung, und 林和容. „The Shaking Table Test of Base Isolation Bridge“. Thesis, 1994. http://ndltd.ncl.edu.tw/handle/95478733441199905920.
Der volle Inhalt der QuelleLin, Chen-Yu, und 林震宇. „Shaking Table Test and Analysis of a Controllable Friction Isolation System“. Thesis, 2009. http://ndltd.ncl.edu.tw/handle/10918096651994071624.
Der volle Inhalt der Quelle國立高雄第一科技大學
營建工程所
97
Base isolation technology is an effective earthquake resistance technique, since it can be used for protecting both the structural system and the internal equipment. Nevertheless, recent studies have revealed that an isolation system may induce an excessive response when subjected to a near-fault earthquake that contains a long-period pulse waveform. In order to improve isolation efficiency in near-fault earthquakes, a semi-active sliding isolation system called Piezoelectric Smart Isolation System (PSIS), which consists of a sliding isolation system and a semi-active piezoelectric friction damper, is proposed in this study. The semi-active damper functions as a supplementary energy dissipating device for the isolation system. Because of its low energy demand and quick response, a piezoelectric actuator was chosen as the control device for regulating the clamping force of the semi-active friction damper. In this thesis, both theoretical and experimental investigations were conducted for the proposed PSIS isolation system. Three kinds of control laws were employed to control the PSIS. These control laws are: (1) Seim-active optimal control (semi-LQR), (2) Non-sticking friction control (NSF), (3) Fuzzy friction controller. The test results show that the PSIS with NSF (��=20) or Fuzzy (rule=15555) controller has the best isolation efficiency and requires the less sensors. The test results also demonstrate that the dynamic responses of the PSIS with different kinds of the control laws are very consistent with the theoretical ones obtained from numerical simulation. This verifies the feasibility and efficiency of the PSIS system.
Jheng, Jhong-Rong, und 鄭忠榮. „Research on the central controller for a three-axis electronically controlled vibration isolation table“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/60466481397187288233.
Der volle Inhalt der Quelle雲林科技大學
機械工程系碩士班
98
In this thesis a vibration isolation table is regulated by proportional pneumatic valves. The linear variable differential transformers are used to measure the height of the table. A central control unit is devised to supervise the regulation of three pneumatic valves for automatic leveling. The central control unit is a 16-bit microcontroller, which initializes communication between three local controllers and the central control unit. A proportional-integral-derivative (PID) algorithm is used as the control law. It is found that positioning accuracy cannot be satisfactorily achieved when each axis is controlled independently. This phenomenon can be improved using the central controller, which also raises transient speeds. Experimental results indicate that with the central controller, long-time accuracy can be better maintained compared to independent local control.
TSAI, I.-JEN, und 蔡宜真. „Shaking Table Study on Seismic Performance of Scaled-Down Models with Mid-Story Seismic Isolation“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86926778066390293091.
Der volle Inhalt der QuelleMa, Tsu-Wen, und 馬祖文. „Development of Position Control for an Active Pneumatic Isolation Table System via High Speed on/off Valves“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/88866006955479016608.
Der volle Inhalt der Quelle臺灣大學
工程科學及海洋工程學研究所
98
This study aims to develop the position control of an active PWM (Pulse Width Modulation)-controlled pneumatic isolation table system. A novel concept using parallel dual-on/off valves with PWM control signals is implemented to realize active control and to improve the conventional pneumatic isolation table that supported by four pneumatic cushion isolators. In this study, the cushion isolators are not only passive vibration isolation devices, but also pneumatic actuators in active position control. Four independent closed-loop position feedback control system are designed and implemented for the four axial isolators. In this study, on/off valves are used, and PWM is realized by software. Therefore, additional hardware circuit is not required to implement PWM and not only cost down but also reach control precision of demand. The study first derives the nonlinear time-variant mathematical models of single-axial pneumatic isolation system and then simplifies the models as a 3rd system. In the controller design, the Fourier series-based adaptive sliding-mode controller with H-infinity tracking performance is used to deal with the uncertainty and time-varying problems of pneumatic system. The open-loop and closed-loop dynamic simulations are implemented by MATLAB to verify the feasibility of the proposed system and controller. Finally, the experiments on the pneumatic isolation table system for synchronous position and trajectory tracking control, including no-load and loading conditions, and synchronous position control with master-slave method are implemented in order to verify that the controller for each cushion isolator can realize good position and trajectory tracking performance.
Chun-ChiaoLin und 林均巧. „Applications of Energy Flux and Numerical Analyses to the Plasma Etching of Silicon Deep Trench Isolation (DTI) Structures“. Thesis, 2018. http://ndltd.ncl.edu.tw/handle/95y4j9.
Der volle Inhalt der Quelle國立成功大學
機械工程學系
106
The deep trench isolation (DTI) structure plays an important role in the three-dimensional integrated circuit, and the most efficient way to etch an anisotropic DTI structure is to use the BOSCH etching method. However, setting the operating parameters of the BOSCH is a complicated issue. If the influence of the operating parameters on the etching profile can be known in advance, the process efficiency can be improved. In this study, a theoretical energy flux model and an experimental energy flux model are used to study the correlations between operating parameters and etching profiles. The ANSYS/LS-DYNA numerical analysis software were used to simulate the etching profile, and Johnson-Cook failure criterion was added as the silicon failure condition. Through the theoretical energy flux model, the energy flux of SF6 and C4F8 etching gases at different coil powers can be calculated separately. Through the experimental energy flux model, the relationship between the etch rate and the energy flux of the SF6/C4F8 mixed gas, and the relationship between the gas flow rate and the energy flux can be established. Combining the results of theoretical and experimental energy flux models, the energy flux ratio contributed by each gas in the mixed gas can be obtained. The etching profile obtaining from different energy fluxes can be simulated from ANSYS/LS-DYNA. This study proposes a new way to simulate the etching profile. Using the Gaussian distribution function to adjust the morphology of the plasma indenter and iteratively to find the maximum pressure need to be assumed for the plasma indenter. Comparing the simulated etching profiles with the experimental samples etching profiles obtains the maximum relative error to be controlled within 6.52%.
Pasala, Dharma Theja. „Seismic response control of structures using novel adaptive passive and semi-active variable stiffness and negative stiffness devices“. Thesis, 2013. http://hdl.handle.net/1911/72017.
Der volle Inhalt der QuelleSegura, Emilie. „Déterminants moléculaires du clivage protéolytique nécessaire à la fonction de la sous-unité CaVα2δ1 du canal calcique CaV1.2“. Thèse, 2016. http://hdl.handle.net/1866/18902.
Der volle Inhalt der QuelleVoltage-gated calcium channels CaV1.2 play an essential role in the regulation of cardiac excitability. Functional channels are formed by the CaVα1 subunit and the intracellular CaVβ and the extracellular CaVα2δ1 subunits. CaVα2δ1 are type I transmembrane proteins that undergo a posttranslational modification producing their association at the plasma membrane through a glycosylphosphatidylinositol (GPI) anchor. The molecular determinants required for the proteolytic cleavage of the recombinant CaVα2δ1 protein were studied using biochemical, immunocytochemical, fluorescence, and electrophysiological methods. Enzymatic treatment with a phospholipase C specific for the cleavage of phosphatidyl inositol lipids abolished the colocalisation of CaVα2δ1 with a plasma membrane marker as shown using live-cell confocal imaging. Single point mutations G1060I or G1061I in the predicted transmembrane CaVδ domain was shown to significantly reduce the cell surface fluorescence of CaVα2δ1 as characterized by two-color flow cytometry assays and confocal imaging, and to prevent the CaVα2δ1-mediated increase in the peak current density and voltage-dependent gating of CaV1.2 currents. The isoleucine mutations were also associated with a change in the migration pattern of the C-terminal fragments suggesting that proteolytic processing was altered. Single glycine to alanine mutations preserved the protein properties but the double mutant G1060A/G1061A significantly impaired cell surface expression of CaVα2δ1 and its functional regulation of CaV1.2. Altogether our data support a model where one Glycine residue at position 1060 or 1061 is required to produce the dominant proteolytic cleavage of CaVα2δ1 and further suggest that the GPI-anchored form of CaVα2δ1 is essential for channel function.