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Dissertations / Theses on the topic 'Load graph'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Barat, Remi. "Load Balancing of Multi-physics Simulation by Multi-criteria Graph Partitioning." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0961/document.

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Les simulations dites multi-physiques couplent plusieurs phases de calcul. Lorsqu’elles sont exécutées en parallèle sur des architectures à mémoire distribuée, la minimisation du temps de restitution nécessite dans la plupart des cas d’équilibrer la charge entre les unités de traitement, pour chaque phase de calcul. En outre, la distribution des données doit minimiser les communications qu’elle induit. Ce problème peut être modélisé comme un problème de partitionnement de graphe multi-critères. On associe à chaque sommet du graphe un vecteur de poids, dont les composantes, appelées « critères

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2

Predari, Maria. "Load balancing for parallel coupled simulations." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0369/document.

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Dans le contexte du calcul scientique, l'équilibrage de la charge est un problème crucial qui conditionne la performance des simulations numériques parallèles. L'objectif est de répartir la charge de travail entre un nombre de processeurs donné, afin de minimiser le temps global d'exécution. Une stratégie populaire pour résoudre ce problème consiste à modéliser la simulation à l'aide d'un graphe et à appliquer des algorithmes de partitionnement. En outre, les simulations numériques tendent à se complexifier, notamment en mixant plusieurs codes représentant des physiques différentes ou des éche

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3

Sun, Jiawen. "The GraphGrind framework : fast graph analytics on large shared-memory systems." Thesis, Queen's University Belfast, 2018. https://pure.qub.ac.uk/portal/en/theses/the-graphgrind-framework-fast-graph-analytics-on-large-sharedmemory-systems(e1eb006f-3a68-4d05-91fe-961d04b42694).html.

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As shared memory systems support terabyte-sized main memory, they provide an opportunity to perform efficient graph analytics on a single machine. Graph analytics is characterised by frequent synchronisation, which is addressed in part by shared memory systems. However, performance is limited by load imbalance and poor memory locality, which originate in the irregular structure of small-world graphs. This dissertation demonstrates how graph partitioning can be used to optimise (i) load balance, (ii) Non-Uniform Memory Access (NUMA) locality and (iii) temporal locality of graph partitioning in

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4

Deveci, Mehmet. "Load-Balancing and Task Mapping for Exascale Systems." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429199721.

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5

Botadra, Harnish. "iC2mpi a platform for parallel execution of graph-structured iterative computations /." unrestricted, 2006. http://etd.gsu.edu/theses/available/etd-07252006-165725/.

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Thesis (M.S.)--Georgia State University, 2006.<br>Title from title screen. Sushil Prasad, committee chair. Electronic text (106 p. : charts) : digital, PDF file. Description based on contents viewed June 11, 2007. Includes bibliographical references. Includes bibliographical references (p. 61-53).

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6

Yildiz, Ali. "Resource-aware Load Balancing System With Artificial Neural Networks." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607613/index.pdf.

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As the distributed systems becomes popular, efficient load balancing systems taking better decisions must be designed. The most important reasons that necessitate load balancing in a distributed system are the heterogeneous hosts having different com- puting powers, external loads and the tasks running on different hosts but communi- cating with each other. In this thesis, a load balancing approach, called RALBANN, developed using graph partitioning and artificial neural networks (ANNs) is de- scribed. The aim of RALBANN is to integrate the successful load balancing

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Zheng, Chunfang. "GRAPHICAL MODELING AND SIMULATION OF A HYBRID HETEROGENEOUS AND DYNAMIC SINGLE-CHIP MULTIPROCESSOR ARCHITECTURE." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/249.

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A single-chip, hybrid, heterogeneous, and dynamic shared memory multiprocessor architecture is being developed which may be used for real-time and non-real-time applications. This architecture can execute any application described by a dataflow (process flow) graph of any topology; it can also dynamically reconfigure its structure at the node and processor architecture levels and reallocate its resources to maximize performance and to increase reliability and fault tolerance. Dynamic change in the architecture is triggered by changes in parameters such as application input data rates, process

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8

Gillet, Noel. "Optimisation de requêtes sur des données massives dans un environnement distribué." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0553/document.

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Les systèmes de stockage distribués sont massivement utilisés dans le contexte actuel des grandes masses de données. En plus de gérer le stockage de ces données, ces systèmes doivent répondre à une quantité toujours plus importante de requêtes émises par des clients distants afin d’effectuer de la fouille de données ou encore de la visualisation. Une problématique majeure dans ce contexte consiste à répartir efficacement les requêtes entre les différents noeuds qui composent ces systèmes afin de minimiser le temps de traitement des requêtes ( temps maximum et en moyenne d’une requête, temps to

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9

Tbaileh, Ahmad Anan. "Robust Non-Matrix Based Power Flow Algorithm for Solving Integrated Transmission and Distribution Systems." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/89362.

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This work presents an alternative approach to power system computations, Graph Trace Analysis (GTA), and applies GTA to the power flow problem. A novel power flow algorithm is presented, where GTA traces are used to implement a modified Gauss-Seidel algorithm coupled with a continuation method. GTA is derived from the Generic Programming Paradigm of computer science. It uses topology iterators to move through components in a model and perform calculations. Two advantages that GTA brings are the separation of system equations from component equations and the ability to distribute calculations a

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10

Cheng, Danling. "Integrated System Model Reliability Evaluation and Prediction for Electrical Power Systems: Graph Trace Analysis Based Solutions." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/28944.

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A new approach to the evaluation of the reliability of electrical systems is presented. In this approach a Graph Trace Analysis based approach is applied to integrated system models and reliability analysis. The analysis zones are extended from the traditional power system functional zones. The systems are modeled using containers with iterators, where the iterators manage graph edges and are used to process through the topology of the graph. The analysis provides a means of computationally handling dependent outages and cascading failures. The effects of adverse weather, time-varying loads,

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11

Silva, Rafael Ennes. "Escalonamento estático de programas-MPI." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/11472.

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O bom desempenho de uma aplicação paralela é obtido conforme o modo como as técnicas de paralelização são empregadas. Para utilizar essas técnicas, é preciso encontrar uma forma adequada de extrair o paralelismo. Esta extração pode ser feita através de um grafo representativo da aplicação. Neste trabalho são aplicados métodos de particionamento de grafos para otimizar as comunicações entre os processos que fazem parte de uma computação paralela. Nesse contexto, a alocação dos processos almeja minimizar a quantidade de comunicações entre processadores. Esta técnica é frequentemente adotada em P

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12

Helders, Fredrik. "Visualizing Carrier Aggregation Combinations." Thesis, Linköpings universitet, Kommunikationssystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-160132.

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As wireless communications is becoming an increasingly important part of ourevery day lives, the amount of transmitted data is constantly growing, creating ademand for ever-increasing data rates. One of the technologies used for boostingdata rates is carrier aggregation, which allows for wireless units to combine multipleconnections to the cellular network. However, there is a limited number ofpossible combinations defined, meaning that there is a need to search for the bestcombination in any given setup. This thesis introduces software capable of organizingthe defined combinations into tree s

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13

Fourestier, Sébastien. "Redistribution dynamique parallèle efficace de la charge pour les problèmes numériques de très grande taille." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00873816.

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Cette thèse traite du problème de la redistribution dynamique parallèle efficace de la charge pour les problèmes numériques de très grande taille. Nous présentons tout d'abord un état de l'art des algorithmes permettant de résoudre les problèmes du partitionnement, du repartitionnement, du placement statique et du re-placement. Notre première contribution vise à étudier, dans un cadre séquentiel, les caractéristiques algorithmiques souhaitables pour les méthodes parallèles de repartitionnement. Nous y présentons notre contribution à la conception d'un schéma multi-niveaux k-aire pour le calcul

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14

Al-Ameri, Shehab Ahmed. "A framework for assessing robustness of water networks and computational evaluation of resilience." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/12334.

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Arid regions tend to take careful measures to ensure water supplies are secured to consumers, to help provide the basis for further development. The distribution network is the most expensive part of the water supply infrastructure and it must maintain performance during unexpected incidents. Many aspects of performance have previously been discussed separately, including reliability, vulnerability, flexibility and resilience. This study aimed to develop a framework to bring together these aspects as found in the literature and industry practice, and bridge the gap between them. Semi-structure

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15

Vuchener, Clement. "Equilibrage de charges dynamique avec un nombre variable de processeurs basé sur des méthodes de partitionnement de graphe." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0012/document.

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L'équilibrage de charge est une étape importante conditionnant les performances des applications parallèles. Dans le cas où la charge varie au cours de la simulation, il est important de redistribuer régulièrement la charge entre les différents processeurs. Dans ce contexte, il peut s'avérer pertinent d'adapter le nombre de processeurs au cours d'une simulation afin d'obtenir une meilleure efficacité, ou de continuer l'exécution quand toute la mémoire des ressources courantes est utilisée. Contrairement au cas où le nombre de processeurs ne varie pas, le rééquilibrage dynamique avec un nombre

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16

Sattar, Naw Safrin. "Scalable Community Detection using Distributed Louvain Algorithm." ScholarWorks@UNO, 2019. https://scholarworks.uno.edu/td/2640.

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Community detection (or clustering) in large-scale graph is an important problem in graph mining. Communities reveal interesting characteristics of a network. Louvain is an efficient sequential algorithm but fails to scale emerging large-scale data. Developing distributed-memory parallel algorithms is challenging because of inter-process communication and load-balancing issues. In this work, we design a shared memory-based algorithm using OpenMP, which shows a 4-fold speedup but is limited to available physical cores. Our second algorithm is an MPI-based parallel algorithm that scales to a mod

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17

Hong, Changwan. "Code Optimization on GPUs." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1557123832601533.

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Mastio, Matthieu. "Modèles de distribution pour la simulation de trafic multi-agent." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1147/document.

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L'analyse et la prévision du comportement des réseaux de transport sont aujourd'hui des éléments cruciaux pour la mise en place de politiques de gestion territoriale. La simulation informatique du trafic routier est un outil puissant permettant de tester des stratégies de gestion avant de les déployer dans un contexte opérationnel. La simulation du trafic à l'échelle d'un ville requiert cependant une puissance de calcul très importante, dépassant les capacité d'un seul ordinateur.Dans cette thèse, nous étudions des méthodes permettant d'effectuer des simulations de trafic multi-agent à large é

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19

Jule, Alan. "Etude des codes en graphes pour le stockage de données." Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0739.

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Depuis deux décennies, la révolution technologique est avant tout numérique entrainant une forte croissance de la quantité de données à stocker. Le rythme de cette croissance est trop importante pour les solutions de stockage matérielles, provoquant une augmentation du coût de l'octet. Il est donc nécessaire d'apporter une amélioration des solutions de stockage ce qui passera par une augmentation de la taille des réseaux et par la diminution des copies de sauvegarde dans les centres de stockage de données. L'objet de cette thèse est d'étudier l'utilisation des codes en graphe dans les réseaux

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20

Abu-Aisheh, Zeina. "Approches anytime et distribuées pour l'appariment de graphes." Thesis, Tours, 2016. http://www.theses.fr/2016TOUR4024/document.

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En raison de la capacité et de l'amélioration des performances informatiques, les représentations structurelles sont devenues de plus en plus populaires dans le domaine de la reconnaissance de formes (RF). Quand les objets sont structurés à base de graphes, le problme de la comparaison d'objets revient à un problme d'appariement de graphes (Graph Matching). Au cours de la dernière décennie, les chercheurs travaillant dans le domaine de l'appariement de graphes ont porté une attention particulière à la distance d'édition entre graphes (GED), notamment pour sa capacité à traiter différent types

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21

Катюха, Ігор Анатолійович. "Прогнозні моделі електричних навантажень розподільчих мереж в умовах невизначеності вихідної інформації". Thesis, Таврійський державний агротехнологічний університет, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31033.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 «Електричні станції, мережі і системи» (141 Електроенергетика, електротехніка та електромеханіка). – Таврійський державний агротехнологічний університет МОН України, Мелітополь. – Національний технічний університет «Харківський політехнічний інститут» МОН України, Харків, 2017. Дисертаційна робота присвячена розв’язанню актуальної науково- прикладної задачі розроблення сучасного науково- методичного апарату прогнозу споживання електричної енергії в умовах невизначеності, що враховує можливості інформ

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Perarnau, Swann. "Environnements pour l'analyse expérimentale d'applications de calcul haute performance." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00650047.

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Les machines du domaine du calcul haute performance (HPC) gagnent régulièrement en com- plexité. De nos jours, chaque nœud de calcul peut être constitué de plusieurs puces ou de plusieurs cœurs se partageant divers caches mémoire de façon hiérarchique. Que se soit pour comprendre les performances ob- tenues par une application sur ces architectures ou pour développer de nouveaux algorithmes et valider leur performance, une phase d'expérimentation est souvent nécessaire. Dans cette thèse, nous nous intéressons à deux formes d'analyse expérimentale : l'exécution sur machines réelles et la simula

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Катюха, Ігор Анатолійович. "Прогнозні моделі електричних навантажень розподільчих мереж в умовах невизначеності вихідної інформації". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31032.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.14.02 – електричні станції, системи та мережі. – Таврійський державний агротехнологічний університет, Мелітополь, 2017. Дисертаційна робота присвячена розв’язанню актуальної науково-прикладної задачі розроблення сучасного науково-методичного апарату прогнозу споживання електричної енергії в умовах невизначеності, що враховує можливості інформаційного забезпечення автоматизованих систем комерційного обліку електроенергії та особливості окремих споживачів і має на меті підвищення ефективності використання та зб

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Mert, Mecnun. "Effect Of High Hydrostatic Pressure On Microbial Load And Quality Parameters Of Grape Juice." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611536/index.pdf.

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Effect of high hydrostatic pressure (150-200-250 MPa) on the microbial load and quality parameters (pH, color, 5-hydroxymethylfurfural-HMF) of white (Sultaniye) and red (Alicante Bouschet) grape juices with combination of temperature (20-30-40&deg<br>C) and holding time (5-10-15 min) was studied. Increased pressure and temperature showed significant effect on microbial reduction in white and red grape juices (p&lt<br>0.05). The effect of pressure and time on pH drop was found to be insignificant (p&gt<br>0.05). HHP resulted in E&lt<br>1 for white grape and E&lt<br>7 for red grape juice samples

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Casadei, Astrid. "Optimisations des solveurs linéaires creux hybrides basés sur une approche par complément de Schur et décomposition de domaine." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0186/document.

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Dans cette thèse, nous nous intéressons à la résolution parallèle de grands systèmes linéaires creux. Nous nous focalisons plus particulièrement sur les solveurs linéaires creux hybrides directs itératifs tels que HIPS, MaPHyS, PDSLIN ou ShyLU, qui sont basés sur une décomposition de domaine et une approche « complément de Schur ». Bien que ces solveurs soient moins coûteux en temps et en mémoire que leurs homologues directs, ils ne sont néanmoins pas exempts de surcoûts. Dans une première partie, nous présentons les différentes méthodes de réduction de la consommation mémoire déjà existantes

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Kamfer, De Witt. "The effect of maturity and crop load on the browning and concentration of phenolic compounds of Thompson Seedless and Regal Seedless." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95886.

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Thesis (MScAgric)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Thompson Seedless and Regal Seedless are two white seedless table grape cultivars widely produced in South Africa. Both cultivars are susceptible to berry browning, especially Regal Seedless. Browning leads to annual financial losses for table grape growers. Although a correlation between harvest maturity and the occurrence of browning seems to exist, it is still unclear whether maturity levels are the actual contributing factor. The aim of the study was to establish if harvest maturity and crop load could influence t

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Blini, Elvio A. "Biases in Visuo-Spatial Attention: from Assessment to Experimental Induction." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424480.

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In this work I present several studies, which might appear rather heterogeneous for both experimental questions and methodological approaches, and yet are linked by a common leitmotiv: spatial attention. I will address issues related to the assessment of attentional asymmetries, in the healthy individual as in patients with neurological disorders, their role in various aspects of human cognition, and their neural underpinning, driven by the deep belief that spatial attention plays an important role in various mental processes that are not necessarily confined to perception. What follows is or

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Hickey, Cain Charles. "Vines of different capacity and water status alter the sensory perception of Cabernet Sauvignon wines." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42667.

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Reducing disease and increasing fruit quality in vigorous vineyards with dense canopies is demanding of time and resources; unfortunately, vineyards of this nature are common in humid environments. This study investigated the effectiveness with which vine capacity and water status could be regulated as well as if they related to fruit quality and wine sensory perception. The treatments regulating vine size and water status were under-trellis groundcover, root manipulation, rootstocks, and irrigation. Treatments were arranged in a strip-split-split plot design before the introduction of the

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Hill, Brycen Thomas. "Root restriction, under-trellis cover cropping, and rootstock modify vine size and berry composition of Cabernet Sauvignon." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/75223.

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Vineyards in the Mid-Atlantic often have large, vigorous vines that can be costly to manage and produce inadequate fruit for wine production. Dense canopies increase the incidence of fungal disease, require greater allocation of resources to manage, and inhibit fruit development. The primary objective of these studies was to determine effective vine-size modification treatments that would optimize fruit quality, while reducing labor and chemical control. Research factors included root manipulation, under-trellis ground cover, and rootstock. Treatment levels were root bag (RBG) or no root m

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Delanaux, Rémy. "Intégration de données liées respectueuse de la confidentialité." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1303.

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La confidentialité des données personnelles est un souci majeur et un problème peu étudié pour la publication de données dans le Web des données ouvertes (ou LOD cloud, pour Linked Open Data cloud) . Ce nuage formé par le LOD est un réseau d'ensembles de données interconnectés et accessibles publiquement sous la forme de graphes de données modélisés dans le format RDF, et interrogés via des requêtes écrites dans le langage SPARQL. Ce cadre très standardisé est très utilisé de nos jours par des organismes publics et des entreprises. Mais certains acteurs notamment du secteur privé sont toujours

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Kuo, Ming-Chia, and 郭明嘉. "An Efficient Dynamic Load-Balancing Large Scale Graph-Processing System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/kpmh4n.

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碩士<br>國立臺灣大學<br>資訊工程學研究所<br>106<br>Since the introduction of pregel by Google, several large-scale graphprocessing systems have been introduced. These systems are based on the bulk synchronous parallel model or other similar models and use various strategies to optimize system performance. For example, Mizan monitors the workload of each worker to determine whether the workload between the workers is balanced with respect to the execution time. If the workload is unbalanced among workers, Mizan migrates nodes from overloaded workers to under-loaded workers to balance the load among workers and

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Gao, Pu. "Generation and properties of random graphs and analysis of randomized algorithms." Thesis, 2010. http://hdl.handle.net/10012/4987.

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We study a new method of generating random $d$-regular graphs by repeatedly applying an operation called pegging. The pegging algorithm, which applies the pegging operation in each step, is a method of generating large random regular graphs beginning with small ones. We prove that the limiting joint distribution of the numbers of short cycles in the resulting graph is independent Poisson. We use the coupling method to bound the total variation distance between the joint distribution of short cycle counts and its limit and thereby show that $O(\epsilon^{-1})$ is an upper bound of the $\eps$-mi

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Zhang, Li-Wen, and 張力文. "Application of Grid Rational Algorithm for Predicting Hydrograph (GRAPH) Model in Suspended Load Estimation for a Watershed." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24012197829253335659.

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碩士<br>國立中興大學<br>水土保持學系所<br>103<br>Geologic condition in Chingshui River watershed became more fragile after Chi-Chi earthquake. Lots of sediments transported by the torrential floods during the following typhoon seasons cause huge hazards which threaten the protected targets located at the downstream areas. However, the suspend load has its uncertainties and difficult to measure during typhoon event. Alternatively, the indirect estimation of suspend load, which applicable provide early response and handling of disaster prevention, should be proposed. This study, a hydrologic model (Grid Ration

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Liao, Chia-Ying, and 廖家瑩. "The Effect of Trigger-based Animated Instruction on Learning Achievement and Cognitive Load in Simple Quadratic Functions Graph." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/01176774279264291417.

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碩士<br>國立交通大學<br>理學院科技與數位學習學程<br>98<br>Trigger-based Animated Instruction is based on the concept of cognitive load theory and multimedia learning theory. Based on the Trigger-based Animated Instruction, instructors design teaching materials corresponded to classroom instructions, which contribute to guiding attention more easily; and help students take the initiative to search, select and organize information; reduce the burden on working memory as well as cognitive load; and enhance learning. This study adopted a quasi-experimental design by using the simple quadratic function graph of mathem

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González, García José Luis. "Graph Partitioning for the Finite Element Method: Reducing Communication Volume with the Directed Sorted Heavy Edge Matching." Doctoral thesis, 2019. http://hdl.handle.net/11858/00-1735-0000-002E-E625-0.

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Bagchi, Arijit. "Modeling the Power Distribution Network of a Virtual City and Studying the Impact of Fire on the Electrical Infrastructure." Thesis, 2009. http://hdl.handle.net/1969.1/147910.

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The smooth and reliable operation of key infrastructure components like water distribution systems, electric power systems, and telecommunications is essential for a nation?s economic growth and overall security. Tragic events such as the Northridge earthquake and Hurricane Katrina have shown us how the occurrence of a disaster can cripple one or more such critical infrastructure components and cause widespread damage and destruction. Technological advancements made over the last few decades have resulted in these infrastructure components becoming highly complicated and inter-dependent on eac

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廖慶榮. "= Efficient partitioning and load-balancing methods for finite element graphs on distributed memory multicomputer." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/53801561416999492772.

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Ravindran, Rajeswaran Chockalingapuram. "Scheduling Heuristics for Maximizing the Output Quality of Iris Task Graphs in Multiprocessor Environment with Time and Energy Bounds." 2012. https://scholarworks.umass.edu/theses/826.

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Embedded real time applications are often subject to time and energy constraints. Real time applications are usually characterized by logically separable set of tasks with precedence constraints. The computational effort behind each of the task in the system is responsible for a physical functionality of the embedded system. In this work we mainly define theoretical models for relating the quality of the physical func- tionality to the computational load of the tasks and develop optimization problems to maximize the quality of the system subject to various constraints like time and energy. Spe

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