2015 International Joint Conference on Neural Networks (IJCNN), 2015
Most drift detection mechanisms designed for classification problems works in a post-event manner... more Most drift detection mechanisms designed for classification problems works in a post-event manner: after receiving the data set completely (patterns and class labels of the train and test set), they apply a sequence of procedures to identify some change in the class-conditional distribution - a concept drift. However, detecting changes after its occurrence can be in some situations harmful for the process under supervision. This paper proposes a pre-event approach for abrupt drift detection, called by A2D2. Briefly, this method is composed of three steps: (i) label the patterns from the test set, using an unsupervised method; (ii) compute some statistics from the train and test set, conditioned on the given class labels; and (iii) compare the train and test statistics using a multivariate hypothesis test. Also, it has been proposed a procedure for creating datasets with abrupt drift. This procedure was used in the sensivity analysis of A2D2, in order to understand the influence degree of each parameter on its final performance.
Page 1. Elaine A. Carvalho PUC-Rio Rio de Janeiro, Brazil ecarvalho@inf.puc-rio. br Tatiana Escov... more Page 1. Elaine A. Carvalho PUC-Rio Rio de Janeiro, Brazil ecarvalho@inf.puc-rio. br Tatiana Escovedo PUC-Rio Rio de Janeiro, Brazil tatiana@inf.puc-rio.br Rubens N. Melo PUC-Rio Rio de Janeiro, Brazil rubens@inf.puc-rio.br ...
Abstract: The Internet has promoted several changes in the world. In this scenario, new theories,... more Abstract: The Internet has promoted several changes in the world. In this scenario, new theories, paradigms and methodologies have been discussed in the education area. In addition, as the development of learning material is expensive and time-consuming, the ...
This paper presents a distributed dynamic object model that is aligned with the concept of design... more This paper presents a distributed dynamic object model that is aligned with the concept of design history in the context of design problem solving activities. A distributed object model is proposed as an enabling feature for distributed CAD (computer-aided design) allowing teams to work cooperatively, accessing and exchanging information at run time in a distributed engineering environment. The architecture of
Abstract In Web-based education there is an emphasis on reusing and sharing instructional content... more Abstract In Web-based education there is an emphasis on reusing and sharing instructional content due to the complexity of the development process of high-quality learning materials. It leads to the learning objects orientation as well as to partnerships among institutions to ...
Abstract The increasing speed at which information becomes obsolete, and the rapid changes in t... more Abstract The increasing speed at which information becomes obsolete, and the rapid changes in the means by which information is delivered and renewed, is requiring the higher education sector to develop new strategies that are supported by Information and Communication ...
Abstract E-learning has increased on importance as people realize that the use of technology can ... more Abstract E-learning has increased on importance as people realize that the use of technology can improve learning. Consequently, new e-learning environments have been proposed and developed. However, in general they are oriented to address a specific e-...
... Computer Science Department, PUC-Rio lauro@inf.puc-rio.br Rubens Nascimento Melo Computer Sci... more ... Computer Science Department, PUC-Rio lauro@inf.puc-rio.br Rubens Nascimento Melo Computer Science Department, PUC-Rio ... 5. Em oposição a idéia anterior, não permitir o uso de scripts tão complexos que levem os designers a se tornarem programadores. ...
baseada na web, está se tornando mais importante na medida em que possibilita a disseminação de c... more baseada na web, está se tornando mais importante na medida em que possibilita a disseminação de conhecimento e informação através da Internet de modo mais rápido e barato. Consequentemente, arquiteturas para sistemas de aprendizagem têm sido ...
2015 International Joint Conference on Neural Networks (IJCNN), 2015
Most drift detection mechanisms designed for classification problems works in a post-event manner... more Most drift detection mechanisms designed for classification problems works in a post-event manner: after receiving the data set completely (patterns and class labels of the train and test set), they apply a sequence of procedures to identify some change in the class-conditional distribution - a concept drift. However, detecting changes after its occurrence can be in some situations harmful for the process under supervision. This paper proposes a pre-event approach for abrupt drift detection, called by A2D2. Briefly, this method is composed of three steps: (i) label the patterns from the test set, using an unsupervised method; (ii) compute some statistics from the train and test set, conditioned on the given class labels; and (iii) compare the train and test statistics using a multivariate hypothesis test. Also, it has been proposed a procedure for creating datasets with abrupt drift. This procedure was used in the sensivity analysis of A2D2, in order to understand the influence degree of each parameter on its final performance.
Page 1. Elaine A. Carvalho PUC-Rio Rio de Janeiro, Brazil ecarvalho@inf.puc-rio. br Tatiana Escov... more Page 1. Elaine A. Carvalho PUC-Rio Rio de Janeiro, Brazil ecarvalho@inf.puc-rio. br Tatiana Escovedo PUC-Rio Rio de Janeiro, Brazil tatiana@inf.puc-rio.br Rubens N. Melo PUC-Rio Rio de Janeiro, Brazil rubens@inf.puc-rio.br ...
Abstract: The Internet has promoted several changes in the world. In this scenario, new theories,... more Abstract: The Internet has promoted several changes in the world. In this scenario, new theories, paradigms and methodologies have been discussed in the education area. In addition, as the development of learning material is expensive and time-consuming, the ...
This paper presents a distributed dynamic object model that is aligned with the concept of design... more This paper presents a distributed dynamic object model that is aligned with the concept of design history in the context of design problem solving activities. A distributed object model is proposed as an enabling feature for distributed CAD (computer-aided design) allowing teams to work cooperatively, accessing and exchanging information at run time in a distributed engineering environment. The architecture of
Abstract In Web-based education there is an emphasis on reusing and sharing instructional content... more Abstract In Web-based education there is an emphasis on reusing and sharing instructional content due to the complexity of the development process of high-quality learning materials. It leads to the learning objects orientation as well as to partnerships among institutions to ...
Abstract The increasing speed at which information becomes obsolete, and the rapid changes in t... more Abstract The increasing speed at which information becomes obsolete, and the rapid changes in the means by which information is delivered and renewed, is requiring the higher education sector to develop new strategies that are supported by Information and Communication ...
Abstract E-learning has increased on importance as people realize that the use of technology can ... more Abstract E-learning has increased on importance as people realize that the use of technology can improve learning. Consequently, new e-learning environments have been proposed and developed. However, in general they are oriented to address a specific e-...
... Computer Science Department, PUC-Rio lauro@inf.puc-rio.br Rubens Nascimento Melo Computer Sci... more ... Computer Science Department, PUC-Rio lauro@inf.puc-rio.br Rubens Nascimento Melo Computer Science Department, PUC-Rio ... 5. Em oposição a idéia anterior, não permitir o uso de scripts tão complexos que levem os designers a se tornarem programadores. ...
baseada na web, está se tornando mais importante na medida em que possibilita a disseminação de c... more baseada na web, está se tornando mais importante na medida em que possibilita a disseminação de conhecimento e informação através da Internet de modo mais rápido e barato. Consequentemente, arquiteturas para sistemas de aprendizagem têm sido ...
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