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Sagar Uprety

dblp:220/3397 · DBLP profile ↗
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7ranked-venue papers
2as first author
5since 2021 · last 2025
0000-0001-7858-6265ORCID · corroborated

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 5 · 5 since 2021Databases, data management, data science and information retrieval · 2 · 2 first-authorApplied, interdisciplinary, general and emerging computing · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Information extraction and text analysis · 50% Question answering and dialogue systems · 50%
Databases, data mining, and information retrieval
2 papers
Information retrieval · 100%

Topics — the 5 heaviest of 5, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Natural language and speech › Information extraction and text analysis › emotion recognition
multimodal emotion recognition
0.712023
CMMA: Benchmarking Multi-Affection Detection in Chinese Multi-Modal Conversations · NeurIPS 2023
Natural language and speech › Question answering and dialogue systems › multi-party dialogue
multi-party conversation analysis
0.712023
CMMA: Benchmarking Multi-Affection Detection in Chinese Multi-Modal Conversations · NeurIPS 2023
Information retrieval
ranking
0.312018
Modeling Multidimensional User Relevance in IR using Vector Spaces · SIGIR 2018
Information retrieval › retrieval models › language model
relevance model
0.312018
Modeling Multidimensional User Relevance in IR using Vector Spaces · SIGIR 2018
Information retrieval › ranking › context-aware ranking
session-based ranking
0.312018
Modeling Multidimensional User Relevance in IR using Vector Spaces · SIGIR 2018

Methods — techniques the papers use, named apart from their topics

multimodal fusion · 1.3multi-task learning · 1.3vector space model · 0.3quantum probability framework · 0.3
YearPublicationVenuePosition
2025 TermInformer: unsupervised term mining and analysis in biomedical literature
Prayag Tiwari, Sagar Uprety, Shahram Dehdashti, M. Shamim Hossain
Neural Comput. Appl.2
2024 Learning interactions across sentiment and emotion with graph attention network and position encodings
Ao Jia, Yazhou Zhang 0001, Sagar Uprety, Dawei Song 0001
Pattern Recognit. Lett.3
2023 MIP-GAT: A Multi-Task Interactive Graph Attention Network with Position Encodings for Joint Sentiment Classification and Emotion Recognition
Ao Jia, Yazhou Zhang 0001, Sagar Uprety, Dawei Song 0001
CogSci3
2023 CMMA: Benchmarking Multi-Affection Detection in Chinese Multi-Modal Conversations
abstract
Human communication has a multi-modal and multi-affection nature. The inter-relatedness of different emotions and sentiments poses a challenge to jointly detect multiple human affections with multi-modal clues. Recent advances in this field employed multi-task learning paradigms to render the inter-relatedness across tasks, but the scarcity of publicly available resources sets a limit to the potential of works. To fill this gap, we build the first Chinese Multi-modal Multi-Affection conversation (CMMA) dataset, which contains 3,000 multi-party conversations and 21,795 multi-modal utterances collected from various styles of TV-series. CMMA contains a wide variety of affection labels, including sentiment, emotion, sarcasm and humor, as well as the novel inter-correlations values between certain pairs of tasks. Moreover, it provides the topic and speaker information in conversations, which promotes better modeling of conversational context. On the dataset, we empirically analyze the influence of different data modalities and conversational contexts on different affection analysis tasks, and exhibit the practical benefit of inter-task correlations. The full dataset will be publicly available for research\footnote{https://github.com/annoymity2022/Chinese-Dataset}
Yazhou Zhang 0001, Yang Yu 0044, Benyou Wang, Sagar Uprety, Dawei Song 0001, Qiuchi Li, Harry Qin
NeurIPS6
2022 Beyond Emotion: A Multi-Modal Dataset for Human Desire Understanding
abstract
Ao Jia, Yu He, Yazhou Zhang, Sagar Uprety, Dawei Song, Christina Lioma. Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies. 2022.
Ao Jia, Yazhou Zhang 0001, Sagar Uprety, Dawei Song 0001, Christina Lioma
NAACL-HLT4
2020 Quantum-Like Structure in Multidimensional Relevance Judgements
Sagar Uprety, Prayag Tiwari, Shahram Dehdashti, Lauren Fell, Dawei Song 0001, Peter Bruza, Massimo Melucci
ECIR (1)1
2018 Modeling Multidimensional User Relevance in IR using Vector Spaces
abstract
It has been shown that relevance judgment of documents is influenced by multiple factors beyond topicality. Some multidimensional user relevance models (MURM) proposed in literature have investigated the impact of different dimensions of relevance on user judgment. Our hypothesis is that a user might give more importance to certain relevance dimensions in a session which might change dynamically as the session progresses. This motivates the need to capture the weights of different relevance dimensions using feedback and build a model to rank documents for subsequent queries according to these weights. We propose a geometric model inspired by the mathematical framework of Quantum theory to capture the user's importance given to each dimension of relevance and test our hypothesis on data from a web search engine and TREC Session track
Sagar Uprety, Dawei Song 0001, Jingfei Li
SIGIR1