Pereira, Pedro, Helena Fino, and M. Ventim-Neves. "
RF Varactor Design Based on Evolutionary Algorithms."
Mixed Design of Integrated Circuits and Systems (MIXDES), 2012 Proceedings of the 19th International Conference. Warsaw, Poland 2012. 277-282.
AbstractThis paper introduces an optimization methodology for the design of RF varactors. The characterization of the varactor behaviour is supported by a set of equations based on technological parameters, granting the accuracy of the results, as well as the adaptability of the model to any technology. The varactor design is achieved through the implementation of a Genetic Algorithms (GA) optimization methodology, which is able to deal with continuous and/or discrete variables, making possible to suit both technological and layout constraints. A set of working examples for UMC130 technology are addressed. The results presented, spotlight the potential of varactor analytical model, combined with a GA optimization procedure, when integrated in optimization design tools. The accuracy of the results is checked against HSPICE simulator.
Boavida, Nuno, and António Brandão Moniz Research and development expenditure in the business sector as indicator of knowledge economy: the Portuguese experience. Universidade Nova de Lisboa, IET-Research on Enterprise and Work Innovation, Faculty of Science and Technology, 2012.
AbstractThe objective of the paper is to help to understand recent changes in the structure of R&D activities, by analyzing data on the expenditure of the business sector in research and development (R&D). The results are framed in an international context, through comparison with indicators from the most developed countries, divided by technological intensity and economic activity. The study reveals that the indicators of Portuguese R&D expenditure in the business sector are closely linked both to fiscal policy and to high foreign direct investment in knowledge-intensive industries. It also links these indicators to phenomena such as the abundance of skilled labor in pharmaceutical industries and the government intervention in some sectors of the economy (namely health and rail transportation).
Delgado-Gomes, Vasco, Jose A. Oliveira-Lima, Joao F. Martins, Celson Lima, and Pedro Pereira. "
Towards to a Web Service alert software system for standard electrical protective devices."
Intelligent Engineering Systems (INES), 2012 IEEE 16th International Conference on. Lisbon, Portugal 2012. 197-201.
AbstractElectrical Protective Devices are key elements in the electrical network. Their purpose is to perform fault detection in electric power systems, by analysing power system voltages and currents. In order to achieve a more centralized control, protective devices can be connected using Web Services through a Service-Oriented Architecture (SOA) approach. This work targets planning and specification of a mapping between Abstract Communication Service Interface (ACSI) Reporting and Device Profile for Web Services (DPWS) Eventing to achieve a better protective electrical devices control, obtaining an event based alert software system, replacing conventional polling-based systems.