Relevant bibliographies by topics / Port optimisation

Academic literature on the topic 'Port optimisation'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Port optimisation"

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Dahal, Keshav, Stuart Galloway, and Ian Hopkins. "Modelling, simulation and optimisation of port system management." International Journal of Agile Systems and Management 2, no. 1 (2007): 92. http://dx.doi.org/10.1504/ijasm.2007.015683.

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Mattausch, H. J., and K. Yamada. "Application of port-access-rejection probability theory for integrated N-port memory architecture optimisation." Electronics Letters 34, no. 9 (1998): 861. http://dx.doi.org/10.1049/el:19980649.

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Pavlic, Bostjan, Franka Cepak, Boris Sucic, Marko Peckaj, and Bogomil Kandus. "Sustainable port infrastructure, practical implementation of the green port concept." Thermal Science 18, no. 3 (2014): 935–48. http://dx.doi.org/10.2298/tsci1403935p.

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The overall idea and research interest related with the development of sustainable port infrastructure evolved around the core requirements of continuous reduction of negative environmental impacts without jeopardising economic growth. The growth of trade activities and need for competitiveness on the global market are forcing ports around the world to systematically and continuously evaluate all possibilities for the optimisation and related costs reduction. On the implementation level, the greatest challenge is how to empower workers, who operate machines and work on the shop floor, to achieve enduring performance improvements. Presented research work provides a methodological approach for finding realistic solutions to the problem of the future development challenges of seaports. The case study shown in this research represents a practical application of the green port concept with the emphasis on the overall energy efficiency improvement based on testing, deployment and demonstration of energy efficient solutions. Additional emphasis was placed on the state-of-the-art technologies and developing pilot initiatives based on modern energy solutions designed to improve efficiency in fuel consumption and emissions reduction in rubber tired gantry cranes.
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Chagtmi, Nadia, Noureddine Boulejfen, Ramzi Darragi, and Fadhel M. Ghannouchi. "Synthesis and optimisation of new wideband symmetrical six‐port junction." IET Microwaves, Antennas & Propagation 10, no. 10 (July 2016): 1071–79. http://dx.doi.org/10.1049/iet-map.2015.0528.

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Hanumante, Mr Sandeep, and Kirti Sawlani. "Effective Utilization of a Microcontroller Port for Optimisation of Hardware." Procedia Technology 4 (2012): 461–65. http://dx.doi.org/10.1016/j.protcy.2012.05.073.

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Tuljak-Suban, Danijela. "MCDM Bunkering Optimisation in a Hub and Spoke System: The Case of the North Adriatic Ports." PROMET - Traffic&Transportation 31, no. 5 (October 28, 2019): 539–47. http://dx.doi.org/10.7307/ptt.v31i5.3114.

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Choosing an optimal bunkering port that minimises the increase in the operating costs in a hub and spoke system is a multi-criteria decision-making (MCDM) problem. Furthermore, the criteria are related to the port particularities, the environment, fuel price, and some criteria are quantitative while others are qualitative. It is therefore necessary to create a model that takes such features into consideration. Firstly, in this paper a set of the most used criteria will be defined. Then, a method to choose suitable criteria for a hub and spoke system will be proposed. Secondly, using a Fuzzy AHP, weights will be defined and used in a multi-criteria goal function. The outcome is a bunkering policy MCDM model based on the aggregation of fuel consumption and price to criteria related to port characteristics, local aspects and service particularities. All these factors must be considered by a chief engineer (superintendent) in the process of defining a sustainable bunker policy. A case study based on the North Adriatic port system demonstrates the applicability of the proposed model. In addition, the case study highlights that in hub and spoke systems with short loops, feeder ships can regulate cargo capacity and stay at a port with bunkering policy planning.
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Arango, Carlos, Pablo Cortés, Jesús Muñuzuri, and Luis Onieva. "Berth allocation planning in Seville inland port by simulation and optimisation." Advanced Engineering Informatics 25, no. 3 (August 2011): 452–61. http://dx.doi.org/10.1016/j.aei.2011.05.001.

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Irawan, Chandra Ade, Xiang Song, Dylan Jones, and Negar Akbari. "Layout optimisation for an installation port of an offshore wind farm." European Journal of Operational Research 259, no. 1 (May 2017): 67–83. http://dx.doi.org/10.1016/j.ejor.2016.09.032.

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Dundović, Čedomir, Mirko Bilić, and Joško Dvornik. "Contribution to the Development of a Simulation Model for a Seaport in Specific Operating Conditions." PROMET - Traffic&Transportation 21, no. 5 (March 2, 2012): 331–40. http://dx.doi.org/10.7307/ptt.v21i5.248.

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The purpose of this paper is to show the efficiency of application of system dynamic simulation modelling when researching the behaviour dynamics of the port transhipment process, and finding the optimal solution for cargo handling with regard to the type and scope of cargo traffic, directions of movement, and pace of receiving and shipping of cargo. In view of the potential scientific implementation and verification of the hypotheses about the usage of system dynamic simulation models, the goals are multi-dimensional as they include designing qualitative and quantitative simulation models for a non-linear system, verification of the validity of the behaviour dynamics of the model, application of the simulation models, application of the parameter optimisation of the simulated process, and scientific verification of the results obtained through the simulation of the model. In compliance with the developed system-dynamic, mental-verbal and structural model, using the Powersim Studio system-dynamic flowchart of the port cargo system, in Powersim Studio simulation language, it is possible to conduct a scientific research of the dynamics of the continuous behaviour of the observed port cargo system in an experimental way, i. e. by using computers, simulating various scenarios of likely occurrences in the real world, without jeopardising it. KEY WORDS: system dynamics, modelling, transhipment process, optimisation, continued and discrete simulation
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Ansorena, Iñigo L., and Vicente Negro Valdecantos. "The port of Valencia maritime network: an analysis of centralities and tree-optimisation." International Journal of Logistics Systems and Management 39, no. 1 (2021): 127. http://dx.doi.org/10.1504/ijlsm.2021.115077.

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Dissertations / Theses on the topic "Port optimisation"

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Mbiydzenyuy, Gideon. "An Optimisation Model for Sea Port Equipment Configuration." Thesis, Blekinge Tekniska Högskola, Avdelningen för för interaktion och systemdesign, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4244.

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Today, freight volumes on roads have gone up to a level that there is a need for alternative transport modes. Short Sea Shipping (SSS) is one alternative with a potential that can help reduce the high traffic on roads. Most SSS systems use vessels whereby cargo is rolled on and off using a ramp with very small capacities usually less than 500 TEU, but with increasing cargo traffic, it is not clear if such solutions will be efficient. For ports involved in SSS to meet up this new wave of change, the challenge to make appropriate investments and analysis tools is important. The type of vessel suitable for a SSS operation (such as roll-on roll-off (RoRo), lift-on lift-off (LoLo) etc) has been addressed in this thesis based on their compatibility and cost effectiveness with the terminal equipments. The purpose of this study is to develop an optimization model that can be incorporated into a Computer Decision Support System (DSS) for selecting equipments including ships at a strategic level for investments in handling unitised cargo at port terminals in the context of Short Sea Shipping (SSS). The main contribution of the thesis is the application of computer science techniques in the domain of strategic decision making related to the configuration of complex systems (e.g. interrelationships between ships and equipments) with choices of handling equipment. From modelling the selection of port terminal equipments for SSS, we realised that while integer linear programming is a promising approach for studying such systems, it remains a challenge to handle complex issues in depth especially in relation to the quay crane due to interdependencies between time, cost and capacity of equipments. Model results indicates that a LoLo vessel with a capacity between (500 and 1000 TEU) capable of completing a SSS voyage such that handling is done within 48 hours will be less costly than a RoRo that does it with multiple voyages or one voyage each for multiple RoRo vessels for TEU volumes greater than 1000. But RoRo vessels remain useful for trailers that cannot be transported by LoLo vessels. containers.
Lotsgatan 14 374 35, Karlshamn Mobile: 0046 768 85 67 13
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Kefi, Meriam. "Optimisation Heuristique Distribuée du Problème de Stockage de Conteneurs dans un Port." Phd thesis, Ecole Centrale de Lille, 2008. http://tel.archives-ouvertes.fr/tel-00366467.

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Les terminaux à conteneurs constituent des interfaces inter-modales essentielles pour le réseau de transport mondial. Une manutention efficace des conteneurs dans des terminaux est d'une importance cruciale pour la réduction des coûts de transport et la détermination des plans d'embarquement. Dans ce rapport de thèse, nous proposons principalement une approche de résolution distribuée à travers la description d'un modèle d'optimisation heuristique distribuée baptisé COSAH COntainer Stacking via multi-Agent approach and Heuristic methodqui permet de simuler, résoudre et optimiser l'espace de stockage disponible pour manier les départs et les arrivées des conteneurs dans un port fluvial ou maritime. Autrement dit, COSAH permet de minimiser le nombre total de mouvements parasites tout en respectant des contraintes dynamiques d'espace et de temps. Les performances de COSAH sont ensuite évaluées sur des instances générées aléatoirement, ainsi que des instances extraites de la réalité d'un port maritime tunisien : le port de Radès. En effet, nous avons procédé à une étude expérimentale implémentant et comparant COSAH à la version centralisée associée, toutes deux basées sur un algorithme de recherche non informée et un algorithme de recherche informée. Les résultats obtenus, présentés et illustrés, montrent l'efficacité de COSAH en particulier, et d'une méthode d'optimisation heuristique distribuée alliant les deux concepts : Agent et Heuristique, en général.
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Rouky, Naoufal. "Optimisation et simulation de la massification du transport multimodal de conteneurs." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMLH40/document.

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Les ports maritimes se confrontent à des exigences rigoureuses imposées par l'évolution de la taille de la flotte mondiale des porte-conteneurs et des zones de stockage qui arrivent à des niveaux de saturation élevés. Pour répondre à ces défis, plusieurs ports ont décidé de créer des terminaux multimodaux qui jouent le rôle de méga-hubs pour les terminaux maritimes, en vue de libérer les zones de stockage de ces terminaux, de développer la part du transport massifié de conteneurs et de réduire les émissions des gaz à effet de serre en utilisant des modes alternatifs à la route. Néanmoins, la gestion de ces nouveaux schémas logistiques est laborieuse. Cela s’explique par plusieurs facteurs, entre autres, la nature dynamique et distribuée de ces systèmes, la diversité des opérations et le manque des informations nécessaires au contrôle de flux. La finalité de cette thèse est de développer des approches capables de répondre aux besoins des opérateurs portuaires dans un terminal multimodal, avec prise en compte des différentes sources d’incertitudes. Deux problèmes d'optimisation sont principalement considérés dans cette thèse, à savoir : l'optimisation de tournées de navettes ferroviaires (The Rail Shuttle Routing Problem) et l'ordonnancement de grues de quai (The Quay Crane Scheduling Problem). En vue d'aborder la complexité et l’aspect incertain de ces problèmes, nous proposerons des modélisations mathématiques, ainsi que des approches de résolution basées sur l’optimisation par colonies de fourmis, l’optimisation robuste et le couplage Simulation-Optimisation. Les différents tests numériques effectués ont prouvé l’efficacité des algorithmes proposés et leur robustesse
Today, seaports face increasingly stringent requirements imposed by the considerable growth of goods transited by sea. Indeed, the organization of the port sector has evolved rapidly and has caused several negative impacts, including pollution and congestion of terminals, which constitute today the major concerns of port operators. To address those challenges, several ports have decided to build multimodal terminals that act as mega-hubs for maritime terminals, in order to free the storage areas on the maritime terminals, to promote the use of consolidated container modes of transfer and to reduce greenhouse gas emissions by using alternative modes to the road. Nevertheless, the management of these new logistic systems is laborious. This is due to several factors, including the dynamic and distributed nature of these systems, the variety of operations, and the lack of information needed to control flow. The aim of this thesis is to develop approaches capable of meeting the needs of port operators in a multimodal terminal, taking into account the different sources of uncertainty. Two optimization problems are mainly considered in this thesis, namely : the Rail Shuttle Routing Problem(RSRP) and the Quay Crane Scheduling Problem(QCSP). To address the complexity and uncertainties of these problems, we propose new mathematical models, as well as some heuristics approaches based on ant colony optimization, robust optimization and Simulation-Optimization. The various numerical tests carried out proved the effectiveness and the robustness of the proposed algorithms
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Assaf, Cyril. "La gestion du Terminal à conteneurs du Port de Beyrouth et l’apport de la théorie de la structuration d’A. Giddens." Thesis, Paris 2, 2016. http://www.theses.fr/2016PA020023/document.

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La problématique porte sur la façon dont les ports en général et le Terminal à conteneurs du Port de Beyrouth au Liban, en particulier, pourraient améliorer leur gestion et optimiser le fonctionnement de leurs opérations au quotidien. Nous avons également introduit la théorie de la structuration de Giddens qui est une théorie du social et des rapports sociaux, pour voir dans quelle mesure certains de ses principes pourraient être bénéfiques à notre étude.Le thème de la gestion d’un terminal à conteneurs et les failles qui résident dans sa gestion et qui nuisent à ses performances est un sujet qui n’a pas été traité en profondeur auparavant. Notre immersion dans cet environnement, à savoir le Terminal à conteneurs du Port de Beyrouth durant un an nous a permis de comprendre la véritable nature de ces problèmes ainsi que leurs sources.Notre présence sur le terrain nous a donné l'occasion de conduire une série d’entretiens avec les chefs de département afin de comprendre les lacunes et les obstacles auxquels ils font face et être en mesure de proposer des solutions adaptées à leurs problèmes par le biais de cette thèse.Nos entretiens avec les chefs de département ont eu pour but de recueillir pour chaque département une description du fonctionnement quotidien des opérations, les principaux problèmes et défis les plus récurrents auxquels ils font face afin de trouver les manières de les contrer.Cette thèse a pour but de dresser une liste de recommandations par département afin d’améliorer leur performance dans le futur et d’augmenter ainsi la performance globale du Terminal à conteneurs du Port de Beyrouth
The problematic covers the way ports in general and the container terminal of the port of Beirut in Lebanon, in particular, manage and optimize the flow of their daily operations.We also included the theory of structuration of Giddens which is a social theory and a theory of social relations, to see how some of its principles could be valuable to our study.The subject of the management of a container terminal and the flaws that reside in its management and that affect its performance is an issue that has not been discussed in depth before. Our deep dive in the container terminal of Beirut port for a year has allowed us to understand the true nature of its problems and their sources.Our presence on the ground gave us the opportunity to conduct a series of meetings with heads of departments in order to understand the gaps and obstacles they face and be able to suggest solutions to their problems through this thesis.Our interviews with heads of departments were aimed at gathering for each department a description of the daily running of operations, the most recurrent problems and challenges they face and come up with possible ways to counter them.This thesis aimed to develop a list of recommendations by department in order to improve each department’s performance in the future and thereby increase the overall performance of the Beirut container terminal
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Ayachi, Hajjem Imen. "Techniques avancées d'optimisation pour la résolution du problème de stockage de conteneurs dans un port." Thesis, Ecole centrale de Lille, 2012. http://www.theses.fr/2012ECLI0003/document.

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Le chargement/déchargement des conteneurs et leurs stockages provisoires dans le port est la plus importante et complexe tâche dans les terminaux portuaires. Elle est fortement liée au routage des grues de quai et son coût augmente considérablement surtout en absence d’une gestion efficace du terminal. Dans ce travail, nous étudions le problème de stockage des conteneurs (PSC). Il appartient à la catégorie des problèmes NP-difficiles et NP-complets. PSC consiste à déterminer un plan d’arrangement des conteneurs destinés à l’import et à l’export dans le port qui minimise les remaniements ultérieurs lors de leur transfert vers le bateau, camion ou train. En effet, le temps d'attente des camions des clients, le temps de transfert des grues de quai et le temps nécessaire au chargement/déchargement du navire sont avantageusement réduits. PSC est généralement étudié en considérant un seul type de conteneur. Cependant, plusieurs types de conteneurs sont utilisés dans les ports maritimes (dry, réfrigérés, toit ouvert,...). En outre, le problème de stockage de conteneurs peut être traité de façon statique ou dynamique (date d’arrivée et de départ des conteneurs incertains).L’objectif de cette thèse est de résoudre le PSC statique et le PSC dynamique pour un seul et plusieurs types de conteneurs en utilisant deux métaheuristiques : l’algorithme génétique, la recherche harmoniquePour vérifier la performance de chacune des approches proposées, une étude comparative des résultats générés par chaque méthode ainsi que celle de l’algorithme LIFO est établie
The loading and unloading of containers and their temporary storage in the container terminal are the most important and complex operation in seaport terminals. It is highly inter-related with the routing of yard crane and truck and their costs increased significantly especially without an efficient terminal management. To improve this process, an efficiency decision for the container storage space allocation must be taken.In this thesis, we studied the container storage problem (CSP). It falls into the category of NP hard and NP complete problems. CSP consists on finding the most suitable storage location for incoming containers that minimizes rehandling operations of containers during their transfer to the ship, truck or train. In fact, the wait time of customer trucks, the transfer time of yard crane and the Ship turnaround time are advantageously reduced.Generally, this problem is studied considering a single container type. However, this does not stand the problem under its real-life statement as there are multiple container types that should be considered, (refrigerated, open side, empty, dry, open top and tank). Often, containers arrive at the port dynamically over time and have an uncertain departure date (ship delayed, a ship down, delayed arrival of customer trucks…). Indeed, CSP must be studied in dynamic aspectThe objective of this thesis is to study Static CSP for a single and various container type and dynamic CSP for ONE and several container types and to propose solutions for each of them. Genetic algorithm and Harmony Search algorithm are used to solve these problems and we compare the results of each approach with the LIFO algorithm
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Tano, Krongrossi. "Conception et implémentation d'un système intégrant des modèles de simulation et un SIADS (système interactif d'aide à la décision spécifique) de gestion portuaire : application à la gestion du port autonome d'Abidjan." Paris 9, 1994. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1994PA090020.

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L'environnement économique mondial morose, accentué dans les pays sous-développés par le peu de moyens dont ils disposent, impose aux différents responsables une optimisation de leur gestion et une organisation rationnelle des structures existantes. C'est dans cet esprit que nous avons abordé ce travail qui a pour finalité l'optimisation de la gestion des ports en particulier celui du port autonome d’Abidjan. Après une analyse approfondie de la situation de ce port, nous nous sommes trouvés en présence d'un problème combinatoire vu le nombre de variables ou de paramètres entrant en ligne pour la prise d'une décision. Nous avons donc propose l'intégration d'un système à base de connaissances et de modèles de simulation suivant l'approche du SIADS (système interactif d'aide à la décision). Dans cette optique, nous avons réalisé un SIAD spécifique de gestion portuaire et quatre sous-modèles du modèle général de fonctionnement du port autonome d’Abidjan en vue de son optimisation à partir du GPSS/PC (general purpose simulation system version PC) et du générateur MAG (management applications generator), développé à l'université Paris-Dauphine
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Maddah, Mohammad Reza. "3D visualization and interactive image manipulation for surgical planning in robot-assisted surgery." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0079/document.

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La chirurgie robotisée a été développée pour pallier les difficultés de la chirurgie laparoscopique. Le robot da Vinci (Intuitive Surgical) est largement répandu dans les hôpitaux nord-américains et européens pour la chirurgie abdominale. Basé sur de la téléopération, il améliore la dextérité et la précision des opérations en chirurgie mini-invasive. Cependant, des recommandations incomplètes et des défauts ergonomiques du système, pour positionner les bras du robot à la surface l’abdomen du patient avant l’opération, créent un des principaux problèmes de la chirurgie robotisée : des organes inatteignables ou des collisions entre les instruments pendant l’opération. L’objectif de ces travaux de recherche est de proposer une nouvelle méthode de placement des bras du robot basée sur une assistance opératoire numérique utilisant l’analyse d’images médicales du patient et la modélisation 3D de la surface de son abdomen afin de calculer des positions des bras optimales en fonction des caractéristiques du robot, de la position des organes et du type de chirurgie
Robot-assisted surgery, or “robotic”surgery, has been developed to address thedifficulties with the traditional laparoscopicsurgery. The da Vinci (Intuitive Surgical, CA andUSA) is one of the FDA-approved surgical robotic system which is widely used in the case of abdominal surgeries like hysterectomy and cholecystectomy. The technology includes a system of master and slave tele-manipulators that enhances manipulation precision. However, inadequate guidelines and lack of a human machine interface system for planning the ports on the abdomen surface are some of the main issues with robotic surgery. Unreachable target and mid-surgery collisions between robotic arms are the major problems that surgeons complain about in robotic surgery. The objective of this research is to design a new decision-support tool for planning port placement in robotic surgery. The decision support system will be able to determine the optimal location of the entrance ports on the abdomen surface that is specific to the patient
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Perodou, Arthur. "Frequency design of passive electronic filters : a modern system approach." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEC046.

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L’explosion actuelle du nombre d’appareils connectés (smartphones, drones, IoT, …) et du volume des données à transmettre engendre une croissance exponentielle du nombre de bandes radiofréquences. Toutes les solutions élaborées pour faire face à cette demande croissante, telle que l’agrégation de porteuses, impliquent de concevoir des filtres fréquentiels satisfaisant des contraintes (performance, consommation d’énergie, coût, …) toujours plus strictes. Les filtres passifs AW, pour acoustic wave (AW) en anglais, semblant être les seuls pouvant satisfaire ces contraintes. Cependant, face à l’augmentation drastique de la complexité de leur problème de conception, les méthodes traditionnelles de conception apparaissent limitées. Il devient donc nécessaire de développer de nouvelles méthodes, qui soient systématiques et efficaces d’un point de vue algorithmique. Le problème de synthèse des filtres AW est une instance du problème de synthèse de filtres électroniques passifs, intrinsèquement lié aux origines de la théorie des Systèmes linéaires et de l’Automatique. Des méthodes systématiques ont été développées pour des cas particuliers, tels que les filtres LC-échelle, mais n’incluent pas les filtres AW. Notre but est donc de les revisiter et de les généraliser en utilisant une approche systémique moderne, afin d’obtenir une méthodologie systématique et efficace de conception de filtres électroniques passifs, avec un intérêt particulier pour les filtres AW. Pour ce faire, le paradigme de l’optimisation convexe, et particulièrement la sous-classe nommée optimisation LMI, nous paraît être un candidat naturel. Doté de solveurs efficaces, il permet de résoudre un large éventail de problèmes d’ingénierie en un faible temps de calcul. Afin de relier notre problème de conception à cet environnement, il est proposé d’utiliser des outils modernes tels que la représentation LFT et la caractérisation mathématique dite de dissipativité. Historiquement, deux approches de conception se sont opposées. La première consiste à faire varier les valeurs caractéristiques des composants jusqu’à satisfaction du gabarit fréquentiel. Bien que flexible et proche de la formulation originelle du problème, cette approche aboutit typiquement à un problème d’optimisation complexe. Notre première contribution est d’avoir révélé les sources de cette complexité ainsi que de les avoir considérablement réduites, en introduisant une représentation originale qui résulte de la combinaison de l’outil LFT et du formalisme des Systèmes Hamiltoniens à Ports. Un algorithme résolvant séquentiellement des problèmes LMIs est proposé, possédant un taux de convergence raisonnable si le point initial est bien choisi. La seconde approche se compose de deux étapes. Une fonction de transfert est d’abord synthétisée de façon à satisfaire le gabarit fréquentiel. Cette étape correspond à un problème classique d’Automatique et de Traitement du Signal qui peut être efficacement résolu via l’optimisation LMI. Puis, cette fonction de transfert est réalisée comme un circuit avec une topologie donnée. Pour cela, elle doit satisfaire des conditions de réalisation. Ces dernières ne peuvent pas toutes être inclues dans la première étape, et nous formalisons certaines pratiques courantes pour en considérer le plus possible. Cela nous mène à résoudre le problème général de synthèse fréquentielle de filtres LFT. Notre seconde contribution est d’avoir fourni des méthodes de synthèse efficaces, à base d’optimisation LMI, pour résoudre certains sous-problèmes. Cela est accompli en généralisant la technique de la factorisation spectrale conjointement avec l’utilisation des extensions du Lemme KYP. Pour certains filtres électroniques passifs, comme les filtres LC-échelle passe-bande, la seconde approche permet de résoudre efficacement le problème de conception associé. Plus généralement, elle procure un point initial à la première approche, comme illustré dans le cas d’un filtre AW
The current explosion of communicating devices (smartphones, drones, IoT...), along with the ever-growing data to be transmitted, produces an exponential growth of the radiofrequency bands. All solutions devised to handle this increasing demand, such as carrier aggregation, require to synthesise frequency filters with stringent industrial requirements (performance, energy consumption, cost ...). While the technology of acoustic wave (AW) resonators, that seem to be the only passive micro-electronic components available to fulfil these requirements, is mature, the associate design problem becomes dramatically complex. Traditional design methods, based on the intuition of designers and the use of generic optimisation algorithms, appear very limited to face this complexity. Thus, systematic and efficient design methods need to be developed. The design problem of AW filters happens to be an instance of the more general design problem of passive electronic filters, that played an important role in the early development of Linear Control and System theory. Systematic design methods were developed in particular cases, such as for LC-ladder filters, but do not enable to tackle the case of AW filters. Our aim is then to revisit and generalise these methods using a modern System approach, in order to develop systematic and efficient design methods of passive electronic filters, with a special focus on AW filters. To achieve this, the paradigm of convex optimisation, and especially the sub-class of Linear Matrix Inequality (LMI) optimisation, appears for us a natural candidate. It is a powerful framework, endowed with efficient solvers, able to optimally solve a large variety of engineering problems in a low computational time. In order to link the design problem with this framework, it is proposed to use modern tools such as the Linear Fractional Transformation (LFT) representation and a mathematical characterisation coming from Dissipative System theory. Reviewing the different design methods, two design approaches stand out. The first approach consists in directly tuning the characteristic values of the components until the frequency requirements are satisfied. While very flexible and close to the original problem, this typically leads to a complex optimisation problem with important convergence issues. Our first main contribution is to make explicit the sources of this complexity and to significantly reduce it, by introducing an original representation resulting from the combination of the LFT and the Port-Hamiltonian Systems (PHS) formalism. A sequential algorithm based on LMI relaxations is then proposed, having a decent convergence rate when a suitable initial point is available. The second approach consists of two steps. First, a transfer function is synthesised such that it satisfies the frequency requirements. This step is a classical problem in Control and Signal Processing and can be efficiently solved using LMI optimisation. Second, this transfer function is realised as a passive circuit in a given topology. To this end, the transfer function needs to satisfy some conditions, namely realisation conditions. The issue is to get them with a convex formulation, in order to keep efficient algorithms. As this is generally not possible, an idea is to relax the problem by including common practices of designers. This leads to solve some instances of a general problem denoted as frequency LFT filter synthesis. Our second main contribution is to provide efficient synthesis methods, based on LMI optimisation, for solving these instances. This is achieved by especially generalising the spectral factorisation technique with extended versions of the so-called KYP Lemma. For particular electronic passive filters, such as bandpass LC-ladder filters, this second approach allows to efficiently solve the design problem. More generally, it provides an initial point to the first approach, as illustrated on the design of a particular AW filter
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Rousseau, Xavière. "Optimisation de l'utilisation de phosphore alimentaire chez le porc et le poulet en croissance." Thesis, Tours, 2013. http://www.theses.fr/2013TOUR4057/document.

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La réduction des apports alimentaires de phosphore (P) ainsi que l’optimisation de son utilisation par les animaux représentent des enjeux majeurs pour assurer la durabilité des filières avicole et porcine. Le développement de systèmes d’alimentation assurant une utilisation efficace du phosphore est donc crucial en particulier durant la période de finition. Ce travail de thèse a permis de redéfinir le besoin en P des animaux durant cette phase et ce en lien avec les autres constituants de la matrice alimentaire reconnus pour impacter de façon majeure sur l’utilisation globale de P (Ca, phytase microbienne). Ce travail a également permis de quantifier l’impact du Ca et de la phytase microbienne sur les flux digestifs et métaboliques de P. Les connaissances générées contribuent à développer d’une part, des modèles mécanistes simulant le devenir de P à l’échelle de l’animal et d’autre part, de nouveaux systèmes d’alimentation répondant aux enjeux de la durabilité
The reduction of dietary phosphorus (P) and the optimisation of its utilisation by the animals represent major challenges for the sustainability of poultry and pig production. The development of new feeding strategies ensuring an efficient utilization of P appears crucial particularly during the finishing period. The present work contributed to redefine the requirement of P of the animals during this phase in conjunction with the other constituents of the feed matrix well-known to significantly impact on the overall utilisation of P (Ca, microbial phytase). Moreover, this work quantified the impact of Ca and microbial phytase on the digestive and metabolic flows of P. On one hand, generated knowledge helps developing mechanistic models simulating the fate of P in the scale of the animal and on the other hand new feeding systems to meet the challenges of sustainability
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Cagin, Stéphanie. "Méta-modèles réduits et séparés du comportement de balayage d'un moteur Diesel 2-temps pour l'exploration évolutionnaire des espaces de solutions." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0383/document.

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L’utilisation de techniques numériques lors de la conception d’un produit s’est largement généralisée au cours des 30 dernières années. Pourtant, la lenteur des calculs et la spécialisation des modèles numériques restent problématiques.Nous avons donc choisi de développer des modèles réduits du comportement de balayage sur un moteur Diesel 2-temps à lumières. Ces modèles sont analytiques, génériques, rapides d’utilisation et permettent d’éliminer les problématiques de traitement numérique. Ils sont aussi des instruments performants dans la recherche de solutions de conception. Une modélisation CFD 2D a tout d’abord été développée pour servir de bases de données, avec la définition des paramètres primordiaux à suivre pour quantifier un balayage optimal.Le travail de recherche a dévoilé une méthodologie nouvelle fondée sur un méta-modèle du comportement dit « neuro-séparé » comprenant un modèle neuronal d’état, un modèle neuronal pseudo-dynamique et un modèle à variables séparées. Ensuite, un processus d'aide à la décision exploitant les modèles précédents a été mis en place au travers d’un processus d’optimisation évolutionnaire (fondé sur les algorithmes génétiques) puis de la simulation comportementale rapide des solutions optimales de conception par un krigeage.La démarche de conception multipoints de vue, multi-critères et multi-physiques appliquée au moteur intègre aussi une dimension cognitive : l’exploration évolutionnaire des espaces de solutions a été menée de façon libre et forcée. Afin de valider notre approche, nous avons mis en place des critères de qualification appliqués à chacun de nos modèles, permettant de quantifier les écarts visà-vis de la base initiale CFD qui a fondé nos modèles réduits.Notre démarche a mené à la création d’un outil d’aide à la modélisation et à la décision exploitant les modules Python et Matlab développés
The use of numerical methods to design a product became more and more commonover the past 30 years. However, numerical models are still specialized and they do not run fastwhich make their use problematic. So some reduced models of scavenging have been developed. These models are analytical andgeneric; they run quickly and avoid the numerical treatment problems. They are also some efficienttools in the search of design solutions.The work carried out has led to a new methodology based on a behavioral meta-model called“neuro-separated” including a neuronal model of state, a pseudo-dynamic neuronal model and amodel with separated variables. Then, a process of decision aids exploiting the models previouslydeveloped in evolutionary algorithms (genetic algorithms) and the fast behavioral simulation of theoptimal design solutions thanks to the kriging approach.This design approach is multi-viewpoints, multi-criteria and multi-physics. It also includes acognitive dimension: both free and controlled evolutionary explorations of solution spaces have beendone. To validate the method, some qualification criteria have been evaluated for each model. Theyallow to understand and to assume the gap between the reduced models and the initial CFD base(where the model are coming from). Our approach has led to the development of a tool of model and decision aids using Python and Matlab software programs
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Book chapters on the topic "Port optimisation"

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Schindler, Thimo, Christoph Greulich, Dennis Bode, Arne Schuldt, André Decker, and Klaus-Dieter Thoben. "Towards Intelligent Waterway Lock Control for Port Facility Optimisation." In Dynamics in Logistics, 32–41. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44783-0_3.

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Bodon, P., C. Fricke, T. Sandeman, and C. Stanford. "Combining Optimisation and Simulation to Model a Supply Chain from Pit to Port." In Advances in Applied Strategic Mine Planning, 251–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-69320-0_17.

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Kapoulitsas, P., M. Giunti, R. Hampson, A. Cranley, S. Gray, B. Kretschmer, R. Knight, and J. Clark. "Commissioning and Optimisation of the New Lead and Silver Refinery at the Pasminco Port Pirie Smelter." In Lead-Zinc 2000, 187–202. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118805558.ch10.

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Mulder, Judith, and Rommert Dekker. "Optimisation in Container Liner Shipping." In Ports and Networks, 181–203. Abingdon, Oxon ; New York, NY : Routledge, 2018.: Routledge, 2017. http://dx.doi.org/10.4324/9781315601540-12.

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Kim, H., O. M. Querin, and G. P. Steven. "Post-Processing of the Two-Dimensional Evolutionary Structural Optimisation Topologies." In Evolutionary Design and Manufacture, 33–44. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0519-0_3.

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Wang, Hongtao, and James G. A. Croll. "Buckling Design Optimisation of Fibre Reinforced Polymer Shells Using Lower Bound Post-Buckling Capacities." In Experimental Analysis of Nano and Engineering Materials and Structures, 787–88. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_391.

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Vrijling, J. K., S. Gopalan, J. H. Laboyrie, Haskoning, and S. E. Plate. "PROBABILISTIC OPTIMISATION OF THE ENNORE COAL PORT." In Coastlines, structures and breakwaters, 135–47. Thomas Telford Publishing, 1998. http://dx.doi.org/10.1680/csab.26681.0012.

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Capmany, José, and Daniel Pérez. "Practical Implementation of Programmable Photonic Circuits." In Programmable Integrated Photonics, 178–226. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198844402.003.0006.

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In covering the fundamentals and ideal implementation of integrated multi-port interferometers and waveguide meshes, we saw that solutions with larger integration density of programmable unit cells enables the synthesis of more complex circuits. However, photonic integrated circuits (PICs) generally suffer from design and fabrication errors and other non-ideal working conditions, which compromises performance and scalability. In addition, PICs require the development of two additional tiers (electronic hardware and software) to allow their programmability, optimisation and (re)configuration. This chapter introduces basic practical considerations of programmable PIC design and reviews experimental demonstrations of both multi-port interferometers and waveguide mesh arrangements. It analyses the main error sources and their impact on circuit performance and investigates the most challenging evolution obstacles for very large-scale programmable PICs. It introduces an analytical method for arbitrary waveguide mesh analysis. Finally, it presents a general architecture for the control subsystem and introduces the software framework and main algorithms.
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Jarvis, Sarah. "Respiratory disease." In Oxford Handbook of Anaesthesia, 163–90. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198853053.003.0006.

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This chapter describes the anaesthetic management of the patient with respiratory disease. It describes the assessment of respiratory function and pre-operative respiratory investigations, and ventilatory strategies to reduce pulmonary complications. Common respiratory conditions covered include respiratory tract infection; smoking; asthma; chronic obstructive pulmonary disease; bronchiectasis; cystic fibrosis; obstructive sleep apnoea; sarcoidosis; restrictive pulmonary disease, and the patient with a transplanted lung. For each topic, pre-operative investigation and optimisation, treatment, and anaesthetic management are described. Recommendations for the patient who may require post-operative respiratory support (e.g. non-invasive ventilation) are provided.
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"Principles of surgery." In Oxford Handbook of Clinical Surgery, edited by Greg McLatchie, Neil Borley, Anil Agarwal, Santhini Jeyarajah, Rhiannon Harris, and Ruwan Weerakkody, 51–174. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198799481.003.0002.

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This chapter examines the principles of surgery. It begins by explaining the process of history taking and case presentation, and outlining the common surgical symptoms. The chapter then looks at the process of examination and investigation of the patient. It details the evaluation of breast disease, the neck, the abdomen, pelvic disease, peripheral vascular disease, and the skin and subcutaneous tissue disease. The chapter also considers preoperative care, pre-optimisation of the patient, perioperative care, and post-operative management. Finally, it discusses the management of the critically ill surgical patient. The first step is recognising compensated critical illness (e.g. shock compensated by tachycardia and peripheral shutdown or respiratory failure compensated by unsustainable respiratory effort). The surgical team should consider using critical care services for both elective and emergency surgical patients.
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Conference papers on the topic "Port optimisation"

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Iyoob, Mohamed Zaire, and Brett van Niekerk. "CAUDUS: An Optimisation Model To Reducing Port Traffic Congestion." In 2021 International Conference on Artificial Intelligence, Big Data, Computing and Data Communication Systems (icABCD). IEEE, 2021. http://dx.doi.org/10.1109/icabcd51485.2021.9519354.

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Leriche, David, Mustapha Oudani, Adnane Cabani, Ghaleb Hoblos, Joseph Mouzna, Jaouad Boukachour, and Ahmed El Hilali Alaoui. "A simulation-optimisation study for comparison of new logistics systems at Le Havre Port." In 2016 3rd International Conference on Logistics Operations Management (GOL). IEEE, 2016. http://dx.doi.org/10.1109/gol.2016.7731700.

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Maknickienė, Nijolė, Ieva Kekytė, and Algirdas Maknickas. "COMPUTATION INTELLIGENCE BASED DAILY ALGORITHMIC STRATEGIES FOR TRADING IN THE FOREIGN EXCHANGE MARKET." In Business and Management 2018. VGTU Technika, 2018. http://dx.doi.org/10.3846/bm.2018.53.

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Successful trading in financial markets is not possible without a support system that manages the preparation of the data, prediction system, and risk management and evaluates the trading efficien-cy. Selected orthogonal data was used to predict exchange rates by applying recurrent neural network (RNN) software based on the open source framework Keras and the graphical processing unit (GPU) NVIDIA GTX1070 to accelerate RNN learning. The newly developed software on the GPU predicted ten high-low distributions in approximately 90 minutes. This paper compares different daily algorith-mic trading strategies based on four methods of portfolio creation: split equally, optimisation, orthogonality, and maximal expectations. Each investigated portfolio has opportunities and limita-tions dependent on market state and behaviour of investors, and the efficiencies of the trading sup-port systems for investors in foreign exchange market were tested in a demo FOREX market in real time and compared with similar results obtained for risk-free rates.
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Yin, Junfei, Penny Li, and Stephane Pees. "Optimization of Turbocharger Ported Shroud Compressor Stages." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59248.

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With increasing low-end torque and high-power requirements, passenger vehicle applications need large map-width compressor-stages at high-pressure ratio (3.0 and above). Compressor stages in which wheels operate in a normal housing exhibit limitations in stability at high-pressure ratio and in maximal flow capacity. The application of a ported shroud typically improves the surge characteristics of a centrifugal compressor. In this paper, an optimisation procedure for ported-shroud compressor stages was developed based on Design Of Experiment (DOE) procedure. Two DOE procedures are used. The first one is used to optimize the port location, wheel exducer width and diffuser width; the second is used to optimise the housing volute throat area, diffuser width and diffuser outlet radius. The compressor-stage performance was obtained by using a commercial CFD package. After the first DOE, an experimental DOE with a reduced design space was carried out to obtain the optimised port location and wheel exducer width. After the second DOE and optimization, only most promising configurations were manufactured for tests. The DOEs’ procedures and results as well as the CFD results are discussed and analyzed in the paper. Finally, the relative difference between the CFD and tests are discussed. In comparison to the baseline ported-shroud housing, the final configuration has improved map width by 9%, an increased pressure ratio by 0.2 and a higher peak efficiency by about 1 point.
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Duering, Serjoscha, Theresa Fink, Angelos Chronis, and Reinhard König. "Environmental Performance Assessment - The Optimisation of High-Rises in Vienna." In CAADRIA 2022: Post-Carbon. CAADRIA, 2022. http://dx.doi.org/10.52842/conf.caadria.2022.1.545.

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Savage, Joe, and Timothy M. Jones. "HALO: post-link heap-layout optimisation." In CGO '20: 18th ACM/IEEE International Symposium on Code Generation and Optimization. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3368826.3377914.

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Rustell, Michael. "Breakwater Layout Optimisation Using A Root-Finding Algorithm." In Proceedings of Ports '13: 13th Triennial International Conference. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413067.197.

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Domanjko, Žan, and Igor Perko. "Artificial Intelligence Effects on Inventory Planning of Sensitive Products." In Challenges in Economics and Business in the Post-COVID Times. University of Maribor Press, 2022. http://dx.doi.org/10.18690/um.epf.5.2022.42.

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Pharmaceutical companies invested heavily in research and development, nowadays their funds are mostly allocated in the supply chain management. Inventory forecasting using AI focuses on optimising supply chain processes and mitigating operational risks related to the treatment of sensitive products. The purpose of this research is to comprehensively examine the processes and important factors that influence the implementation of forecasting and optimising inventories. The objectives identify data sources, examine data information flows, review appropriate forecasting models and analyse inventory optimisation-related metrics that could be applied in manufacturing companies. In this paper, the authors review the latest literature in the areas of sales forecasting, inventory optimisation and related forecasting models and metrics, with special emphasis on AI models. The literature review includes publications of scientific research results as well as reports on the development results of the applied inventory optimisation solutions in the industry. The research results will be useful for conducting applied research in a selected company, addressing the complex issue of managing a supply chain, as well as the production and storage of perishable materials and products. Results will be useful in research aimed at improving the forecasting of the inventory of sensitive products and consequentially increasing business efficiency.
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Ortner, F. Peter, and Jing Zhi Tay. "Optimizing Design Circularity: Managing Complexity in Design for Circular Economy Through Single and Multi-Objective Optimisation." In CAADRIA 2022: Post-Carbon. CAADRIA, 2022. http://dx.doi.org/10.52842/conf.caadria.2022.1.191.

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Liu, Chunxiao, Chen Change Loy, Shaogang Gong, and Guijin Wang. "POP: Person Re-identification Post-rank Optimisation." In 2013 IEEE International Conference on Computer Vision (ICCV). IEEE, 2013. http://dx.doi.org/10.1109/iccv.2013.62.

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