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This paper describes a compact and effective model for low-latency passage retrieval in conversational search based on learned dense representations. Prior to our work, the state-of-the-art approach uses a multi-stage pipeline comprising…

Information Retrieval · Computer Science 2021-11-30 Sheng-Chieh Lin , Jheng-Hong Yang , Jimmy Lin

Slot filling is a critical task in natural language understanding (NLU) for dialog systems. State-of-the-art approaches treat it as a sequence labeling problem and adopt such models as BiLSTM-CRF. While these models work relatively well on…

Computation and Language · Computer Science 2019-05-07 Yu Gong , Xusheng Luo , Yu Zhu , Wenwu Ou , Zhao Li , Muhua Zhu , Kenny Q. Zhu , Lu Duan , Xi Chen

Deep learning methods exhibit promising performance for predictive modeling in healthcare, but two important challenges remain: -Data insufficiency:Often in healthcare predictive modeling, the sample size is insufficient for deep learning…

Machine Learning · Computer Science 2017-04-04 Edward Choi , Mohammad Taha Bahadori , Le Song , Walter F. Stewart , Jimeng Sun

Query and product relevance prediction is a critical component for ensuring a smooth user experience in e-commerce search. Traditional studies mainly focus on BERT-based models to assess the semantic relevance between queries and products.…

Information Retrieval · Computer Science 2025-03-13 Tian Tang , Zhixing Tian , Zhenyu Zhu , Chenyang Wang , Haiqing Hu , Guoyu Tang , Lin Liu , Sulong Xu

Pattern tree are based on integrated rules which are equal to a combination of some points connected to each other in a hierarchical structure, called Enquiry Hierarchical (EH). The main operation in pattern enquiry seeking is to locate the…

Sequential Recommendation (SR) aims to predict the next interaction of a user based on their behavior sequence, where complementary relations often provide essential signals for predicting the next item. However, mainstream models relying…

Information Retrieval · Computer Science 2026-04-22 Qian Zhang , Lech Szymanski , Haibo Zhang , Jeremiah D. Deng

Relational data stored in RDBMS is foundational to many real-world applications across domains such as e-commerce, finance, and sociality. While deep neural networks (DNNs) have achieved strong performance on tabular data with a single…

Databases · Computer Science 2026-05-15 Lingze Zeng , Shaofeng Cai , Changshuo Liu , Zhongle Xie , Yuncheng Wu , Beng Chin Ooi

To effectively leverage user-specific data, retrieval augmented generation (RAG) is employed in multimodal large language model (MLLM) applications. However, conventional retrieval approaches often suffer from limited retrieval accuracy.…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Maoliang Li , Ke Li , Yaoyang Liu , Jiayu Chen , Zihao Zheng , Yinjun Wu , Chenchen Liu , Xiang Chen

This work addresses the challenge of capturing the complexities of legal knowledge by proposing a multi-layered embedding-based retrieval method for legal and legislative texts. Creating embeddings not only for individual articles but also…

Artificial Intelligence · Computer Science 2025-03-13 João Alberto de Oliveira Lima

Modern e-commerce search is inherently multimodal: customers make purchase decisions by jointly considering product text and visual informations. However, most industrial retrieval and ranking systems primarily rely on textual information,…

Information Retrieval · Computer Science 2026-03-06 Qujiaheng Zhang , Guagnyue Xu , Fengjie Li

Neural document retrieval often treats a corpus as a flat cloud of vectors scored at a single granularity, leaving corpus structure underused and explanations opaque. We use Cobweb--a hierarchy-aware framework--to organize sentence…

Computation and Language · Computer Science 2026-04-17 Anant Gupta , Karthik Singaravadivelan , Zekun Wang

Previous approaches for video summarization mainly concentrate on finding the most diverse and representative visual contents as video summary without considering the user's preference. This paper addresses the task of query-focused video…

Computer Vision and Pattern Recognition · Computer Science 2023-07-19 Shuwen Xiao , Zhou Zhao , Zijian Zhang , Xiaohui Yan , Min Yang

With the increasing number of online stores, there is a pressing need for intelligent search systems to understand the item photos snapped by customers and search against large-scale product databases to find their desired items. However,…

Computer Vision and Pattern Recognition · Computer Science 2019-04-08 Yadan Luo , Ziwei Wang , Zi Huang , Yang Yang , Huimin Lu

Dual encoders perform retrieval by encoding documents and queries into dense lowdimensional vectors, scoring each document by its inner product with the query. We investigate the capacity of this architecture relative to sparse bag-of-words…

Computation and Language · Computer Science 2021-02-18 Yi Luan , Jacob Eisenstein , Kristina Toutanova , Michael Collins

Dense retrieval methods have been mostly focused on unstructured text and less attention has been drawn to structured data with various aspects, e.g., products with aspects such as category and brand. Recent work has proposed two approaches…

Information Retrieval · Computer Science 2024-01-17 Xiaojie Sun , Keping Bi , Jiafeng Guo , Sihui Yang , Qishen Zhang , Zhongyi Liu , Guannan Zhang , Xueqi Cheng

Recently, the retrieval models based on dense representations have been gradually applied in the first stage of the document retrieval tasks, showing better performance than traditional sparse vector space models. To obtain high efficiency,…

Information Retrieval · Computer Science 2021-08-20 Hongyin Tang , Xingwu Sun , Beihong Jin , Jingang Wang , Fuzheng Zhang , Wei Wu

Hierarchical clustering is one of the most powerful solutions to the problem of clustering, on the grounds that it performs a multi scale organization of the data. In recent years, research on hierarchical clustering methods has attracted…

Machine Learning · Computer Science 2019-08-02 Antonia Korba

This paper describes a novel hierarchical attention network for reading comprehension style question answering, which aims to answer questions for a given narrative paragraph. In the proposed method, attention and fusion are conducted…

Computation and Language · Computer Science 2019-08-14 Wei Wang , Ming Yan , Chen Wu

Modern enterprises manage vast knowledge distributed across heterogeneous systems such as Jira, Git repositories, Confluence, and wikis. Conventional retrieval methods based on keyword search or static embeddings often fail to answer…

Artificial Intelligence · Computer Science 2025-10-14 Nilima Rao , Jagriti Srivastava , Pradeep Kumar Sharma , Hritvik Shrivastava

We study the two-dimensional hierarchical rectangle packing problem, motivated by applications in analog integrated circuit layout, facility layout, and logistics. Unlike classical strip or bin packing, the dimensions of the container are…

Computational Geometry · Computer Science 2025-12-24 Josef Grus , Zdeněk Hanzálek , Christian Artigues , Cyrille Briand , Emmanuel Hebrard
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