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Title: The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. II. A Statistical Characterization of Class 0 and Class I Protostellar Disks
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  1. Support Vector Machine (SVM) is originally proposed as a binary classification model, and it has already achieved great success in different applications. In reality, it is more often to solve a problem which has more than two classes. So, it is natural to extend SVM to a multi-class classifier. There have been many works proposed to construct a multi-class classifier based on binary SVM, such as one versus all strategy, one versus one strategy and Weston's multi-class SVM. One versus all strategy and one versus one strategy split the multi-class problem to multiple binary classification subproblems, and we need to train multiple binary classifiers. Weston's multi-class SVM is formed by ensuring risk constraints and imposing a specific regularization, like Frobenius norm. It is not derived by maximizing the margin between hyperplane and training data which is the motivation in SVM. In this paper, we propose a multi-class SVM model from the perspective of maximizing margin between training points and hyperplane, and analyze the relation between our model and other related methods. In the experiment, it shows that our model can get better or compared results when comparing with other related methods.

  2. Our study examines media representations of the so--called “new middle class” during the period 2008-2012, during which the public sphere overflowed with images of new lifestyles and futures as “previously poor” Brazi-lians were invited in national advertising campaigns and in mainstream journalistic accounts to view themselves as members of an ostensibly new demographic sector. Meanwhile, through television, films, and music, Brazi-lians were exposed to stories of socio-economic mobili-ty, usually tied to love, sex, and consumption. Through a detailed review of existing studies of representations in media and advertising campaigns, we reflect on recurring representational patterns, arguing their importance in the construction of new class subjectivities for popular-class Brazilians. Our article seeks to capture the intense discur-sive formations that flourished over a relatively short pe-riod of political and economic stability.