2014
Authors
Abreu, PH; Silva, DC; Portela, J; Mendes Moreira, J; Reis, LP;
Publication
INTELLIGENT DATA ANALYSIS
Abstract
How to improve the performance of a simulated soccer team using final game statistics? This is the question this research aims to answer using model-based collaborative techniques and a robotic team - FC Portugal - as a case study. After developing a framework capable of automatically calculating the final game statistics through the RoboCup log files, a feature selection algorithm was used to select the variables that most influence the final game result. In the next stage, given the statistics of the current game, we rank the strategies that obtained the maximum average of goal difference in similar past games. This is done by splitting offline past games into different k-clusters. Then, for each cluster, the expected best strategy was assigned. The online phase consists in the selection of the expected best strategy for the cluster in which the current game best fits. Regarding the final results, our approach proved that it is possible to improve the performance of a robotic team by more than 35%, even in a competitive environment such as the RoboCup 2D simulation league.
2014
Authors
Neyestani, N; Damavandi, MY; Shafie Khah, M; Catalao, JPS; Chicco, G;
Publication
2014 SMART GRID CONFERENCE (SGC)
Abstract
Smart local energy networks represent a key option for more penetration of sustainably developed facilities. These facilities can cause an extended dependency in both time and carrier domains which should be considered through a comprehensive model. This paper introduces a new concept of internal and external dependencies. The concept is related to penetration of energy converters on demand side and the effects they bring to the system. Being achieved by implementation of smart grid, dependencies release operational flexibility and subsequently enhance the system efficiency. The model contains, carrier based demand response which preserves consumers satisfaction by utilizing the flexibility in exchanging the input energy carrier instead of changing end-usage pattern. The paper develops the coupling matrix model for smart multi-energy systems considering the external dependency as an added module to the overall model.
2014
Authors
Miranda, V; Alves, R;
Publication
2014 INTERNATIONAL CONFERENCE ON PROBABILISTIC METHODS APPLIED TO POWER SYSTEMS (PMAPS)
Abstract
This paper presents a new stochastic programming model for PAR/PST definition and location in a network with a high penetration of wind power, with probabilistic representation, to maximize wind power penetration. It also presents a new optimization meta-heuristic, denoted DEEPSO, which is a variant of EPSO, the Evolutionary Particle Swarm Optimization method, borrowing the concept of rough gradient from Differential Evolution algorithms. A test case is solved in an IEEE test system. The performance of DEEPSO is shown to be superior to EPSO in this complex problem.
2014
Authors
de Bona, DD; Marques, MA; Correia, MV;
Publication
2014 11TH INTERNATIONAL CONFERENCE ON REMOTE ENGINEERING AND VIRTUAL INSTRUMENTATION (REV)
Abstract
This paper reports the development of a system to instrument a surfboard aiming to evaluate wave riding performance. According to the research only 3.8% - 5% of the total surfing time corresponds to the wave riding movements, despite of been the surfing goal. The system developed collects the data from twenty four force sensors positioned beneath the surfer's feet using a microcontroller ATMEGA1280, and determines the surfer's feet positioning and Centre of Pressure (CoP). Furthermore, an Inertial Measurement Unit (IMU) with an ADXL335 accelerometer and an IDG500 gyroscope provides information of the surfboard's position in relation to the gravity force axis. To store the result of the acquisitions a SD Card is used. To transmit the data to an external device such as a computer, a WI-FI module complete the electronic system. A battery management was used to allow the system to work remotely. This work presents an overview of the parameter recognized in literature as influencing athlete's performance and a brief description of the major manoeuvres in competition to figure out the parameters to be measured likewise the system developed. Preliminary tests with five different setups have shown that the force sensors to measure CoP and the electronic circuit board works properly.
2014
Authors
Choobdar, S; Pinto Ribeiro, PM; Silva, FMA;
Publication
Encyclopedia of Social Network Analysis and Mining
Abstract
Dynamic (or volatile) network: A network which structure changes over time, some nodes and edges may appear and disappear Local property: A metric that describes a topological aspect on the local neighborhood of a node Structural role: The structural position of a node in the network, characterized by its local properties Transition pattern: A typical role change, characterized by its time interval and by the origin and destination role Definition Many networks are intrinsically dynamic and change over time. These networks can be very volatile, with a significant number of edges and nodes appearing and disappearing. The majority of the existing network mining methodologies are however geared toward a more static scenario, with a single graph describing the topology of the system being analyzed. There is still a need for measurements and tools that allow the temporal dimension on network analysis to be….
2014
Authors
Sousa, C; Pereira, C;
Publication
COLLABORATIVE SYSTEMS FOR SMART NETWORKED ENVIRONMENTS
Abstract
Within collaborative networks, information sharing and knowledge creation are the main drives for value creation, wherever collaborative spaces (CS) has been used as the means to enable collaboration among the different social actors involved. Despite of technological availability, CS still a challenge in practice, mainly due to the lack of methods to support its development and to its tight coupling with the collaboration model adopted by the network. Thus, the main focus of this paper in on enhancing information sharing through the design of what we call agnostic collaborative spaces (ACS), supported by linked data approaches. Beyond this new perspective over CS, it is discussed a technological solution through which ACS are implemented.
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