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Nomenclatura Unesco > (33) Ciencias Tecnológicas

Mostrando recursos 61 - 80 de 2,129

61. First and second order necessary conditions of optimality for impulsive control problems - Aram Arutyunov; V. Dykhta; Fernando Lobo Pereira

62. Coordinated Control Strategies for Networked Vehicles: An Application to Autonomous Underwater Vehicles - João Tasso Sousa; Fernando Lobo Pereira

63. Multiple UAV teams for multiple tasks - Sujit Baliyarasimhuni; João B. Sousa; F. Lobo Pereira
In a search and prosecute mission, multiple heterogeneous unmanned aerial vehicles UAVs that carry different resources need to perform the classify, prosecute and battle damage assessment (BDA) tasks on targets sequentially. Depending on the target resource requirement, it may be necessary to deploy a coalition of UAVs to perform the action. In this paper, we propose coalition formation algorithms that have low computational overhead to determine coalitions for the prosecute and the BDA tasks. We also develop a simultaneous strike mechanism based on Dubins curves for the UAVs to prosecute the target simultaneously. Monte-Carlo simulation results are presented to show...

64. Autonomous Underwater Vehicle (AUV) and Remotely Operated Vehicle (ROV) Developments at Porto University - A. Matos; N. Cruz; João Tasso Sousa; Fernando Lobo Pereira

65. Mapping and Initial Dilution Estimation of a Sewage Outfall Plume Using an Autonomous Underwater Vehicle - A Ramos; A. Cunha; Carla Barreto; F. Lobo Pereira

66. SLAM Algorithm Applied to Robotics Assistance for Navigation in Unknown Environments - Fernando Cheein; L. López; Julio Lara; Orosco, E.; F. Lobo Pereira; di Sciascio, F.; Carelli, R.

67. Coordinated control strategies for networked vehicles and systems - J. Borges de Sousa; F. Lobo Pereira

68. A set-valued framework for coordinated motion control of networked vehicles - João Tasso Sousa; Fernando Lobo Pereira
A problem of coordinated control for two networked vehicles is presented, formulated, and solved to illustrate a set-valued framework for the coordinated control of networked vehicles. First, an informal user specification for the coordinated operation of two vehicles is introduced. Second, a formal representation of the objects and relations of interest is presented, and the user requirements are mapped onto a formal specification. Third, the specification is transformed onto a control problem formulation. Finally, the problem is solved using techniques from dynamic optimization and generalizations of the problem are discussed. © Nauka/Interperiodica 2006.

69. A Framework for the Automation of a Remotely Operated Vehicle - Sérgio Fraga; J. Borges de Sousa; F. Lobo Pereira

70. Nondegenerate Necessary Conditions of Optimality for Problems Without Normality Assumptions - F. Lobo Pereira; Aram Arutyunov

71. A Importância da Tribologia para a Manutenibilidade no Projecto de Novos Equipamentos - L. A. Ferreira

72. Video summary - Neptus, command and control infrastructure for heterogeneous teams of autonomous vehicles - Paulo Sousa Dias; José Queirós Pinto; Rui Gomes; Gil Manuel Gonçalves; João Tasso Sousa; Fernando Lobo Pereira
This video shows a brief overview over Neptus, a command and control infrastructure for heterogeneous teams of autonomous vehicles. Having different types of vehicles at our laboratory and from our partners, there was an increasing need to create a common infrastructure to all these systems. Additionally, a tool to support the entire mission life cycle (Planning, Execution, Review and Dissemination) was lacking. Neptus was created to provide vehicle independence and seamless inter-systems communications. Currently, Neptus has been already tested with Remotely Operated Vehicles, Autonomous Underwater Vehicles, Unmanned Air Vehicles, Autonomous Surface Vehicles and Wireless Sensor Networks. Some of these systems...

73. Optimização dinâmica para planeamento de movimento e controlo de veículos autónomos - Sérgio Fraga; João Tasso Sousa; Fernando Lobo Pereira

74. Second-order Necessary Conditions of Optimality for Abnormal Solutions of Nonlinear Problems with Equality and Inequality Constraints - Aram V. Arutyunov; Dmitri Yu. Karamzin; Fernando Lobo Pereira

75. A Reachable Set Estimation Algorithm for Impulsive Control Systems - E. Goncharova; V. Baturin; J. Borges de Sousa; F. Lobo Pereira

76. Operations with Multiple Autonomous Underwater Vehicles Operations: The PISCIS project - N. Cruz; A. Matos; João Tasso Sousa; Fernando Lobo Pereira; J. Silva; J. Coimbra; E. B. Dias

77. Pontryagin's Maximum Principle for Impulsive Control Problems with Mixed Constraints - Aram Arutyunov; Dmitry Karamzin; F. Lobo Pereira

78. A New ROV Design: Issues on Low Drag and Mechanical Symmetry - Rui Gomes; Alexandre Sousa; Sérgio Fraga; Alfredo Manuel Martins; João Tasso Sousa; Fernando Lobo Pereira

79. PISCIS: Multiple Autonomous Underwater Vehicles Operations - N. Cruz; A. Matos; João Tasso Sousa; Fernando Lobo Pereira; J. Silva; J. Coimbra; E. B. Dias

80. Coordinated Control of Networked Vehicle Systems: Specification and Control Synthesis - J. Borges de Sousa; F. Lobo Pereira

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