Segue convite seminário online na EMAp/FGV esta quinta-feira as 16h. At., Alexandre
> Begin forwarded message: > > From: Escola de Matematica Aplicada <e...@fgv.br> > Subject: FGV EMAp | Seminário: "Learning meaning from text with a logically > structured model: An introduction to Functional Distributional Semantics" por > Guy Emerson > Date: 16 August 2021 09:15:29 GMT-3 > > > > LEARNING MEANING FROM TEXT WITH A LOGICALLY STRUCTURED MODEL: > AN INTRODUCTION TO FUNCTIONAL DISTRIBUTIONAL SEMANTICS > The aim of distributional semantics is to design computational techniques > that can automatically learn the meanings of words based on the contexts in > which they are observed. The mainstream approach is to represent meanings as > vectors (such as Word2Vec embeddings, or contextualised BERT embeddings). > However, vectors do not provide a natural way to talk about basic concepts in > logic and formal semantics, such as truth and reference. While there have > been many attempts to extend vector space models to support such concepts, > there does not seem to be a clear solution. In this talk, I will instead go > back to fundamentals, questioning whether we should represent meaning as a > vector. > I will present the framework of Functional Distributional Semantics, which > makes a clear distinction between words and the entities they refer to. The > meaning of a word is represented as a binary classifier over entities, > identifying whether the word could refer to the entity (in formal semantic > terms, whether the word is true of the entity). When learning such a > classifier from a corpus of text, the challenge is that the entities > themselves are not observed, and so I define a probabilistic graphical model > where entities are latent variables. This graphical model provides a natural > way to model logical inference, semantic composition, and context-dependent > meanings, where Bayesian inference plays a crucial role. To make inference > tractable, I use amortised variational inference with a graph-convolutional > network. The model is trained on WikiWoods, a parsed version of the English > Wikipedia. I will discuss results on semantic evaluation datasets, > indicating that the model can learn information not captured by vector space > models like Word2Vec and BERT. I will conclude with an outlook for future > work, including joint learning from text, ontologies, and grounded data such > as images. > > Texto informado pelo autor. > > Quando e Onde: > 19 de Agosto de 2021, às 16h > Via Zoom > Registre-se com antecedência para este seminário: > https://fgv-br.zoom.us/meeting/register/tJcsceyupjIjHtK9BmjGS2MH7CpndEK6GGZc > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Ffgv-br.zoom.us%2Fmeeting%2Fregister%2FtJcsceyupjIjHtK9BmjGS2MH7CpndEK6GGZc&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318348768%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=4l8bkUM5gsR0DZB0bn713MVESTpq9Um3%2Bocltx%2FLcLY%3D&reserved=0> > Após o registro, você receberá um e-mail de confirmação contendo informações > sobre conexão no seminário. > > Palestrante: > Guy Emerson - I began my undergraduate studies as a mathematician at Trinity > College, Cambridge, before switching to a masters in computer science, > focusing on computational linguistics. I then spent one year studying at > Saarland University and working at DFKI (the German Research Centre for > Artificial Intelligence), before returning to Cambridge to pursue a PhD under > the supervision of Ann Copestake, which I completed in 2018. My thesis was > awarded Honourable Mention (top 3) for the 2019 E.W. Beth Dissertation Prize, > and Highly Commended (top 3) for the 2019 CPHC/BCS Distinguished Dissertation > Award. I am currently a Research Fellow at Gonville & Caius College, a > Departmental Early-Career Academic Fellow at the Department of Computer > Science and Technology, and an Executive Director of Cambridge Language > Sciences. I also enjoy ballroom and latin dancing (which includes samba, but > the Europeanised version, not the Brazilian version!) > > > > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fportal.fgv.br%2F&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318358761%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ru%2B9ZiVS6jiKcFHEo0s5FQwPqBjm74rTO4w6IEvOW7g%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ffgv&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318368758%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=vwTJIL7coHK7oTYcAOYnp%2BowUnyaSoru9insenbZ8Tk%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2FFGV%2F&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318368758%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=NKZLXfuTyb8zO5cHK2RXJH6NdFeaUU2vxxuFYjDKpkU%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.instagram.com%2FFGV.OFICIAL%2F&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318378756%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3NulRib%2Fy8WpZJ7Bq0FdlOjXevT0%2FVebe%2Boa3xTPOOI%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2Ffgv&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318388745%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=d3PPtS0CRX%2FJ01pQqxqUw731L7iViOxY1BphXYpSVek%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tiktok.com%2F%40fgv.oficial&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318388745%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=J6f1VhM%2B50qaitE7ABWrkdr6rba64nrgm3m1HxXgT20%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Ffgv&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318398741%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=oBzfrcF8OTJToPqIa7zGndRjsivVd3ANWyMh0ur%2BntQ%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fportal.fgv.br%2Fredes-sociais&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318398741%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=e%2BdimQ3F4i6dn9ycVA4uQhLQYU08hDZhEVkVF9XQneg%3D&reserved=0> > > > <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fportal.fgv.br%2Fredes-sociais&data=04%7C01%7CAlexandre.Rademaker%40fgv.br%7C5e6c0649a1154b55fb2108d960af89b4%7C79f6b639ab1242808077bdbeef869b33%7C0%7C0%7C637647129318408740%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=E9ZnoxSQSYGulpqRLEgcPXHlJj9vIma9BsZK3F6J6e8%3D&reserved=0> -- Você está recebendo esta mensagem porque se inscreveu no grupo "LOGICA-L" dos Grupos do Google. 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