DAPC: Answering Why-Not Questions on Top-k Direction-Aware ASK Queries in Polar Coordinates

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作者信息关键词期刊信息基础信息归属信息摘要

成果类型：

期刊论文

作者：

Li, Yanhong;Zhang, Wang;Gao, Yunjun;Li, Qing;Shu, Lihchyun;...

通讯作者：

Gao, Yunjun(gaoyj@zju.edu.cn)

作者机构：

[Li, Yanhong] South Cent Minzu Univ, Coll Comp Sci, Wuhan 430074, Hubei, Peoples R China.

[Zhang, Wang] Huazhong Univ Sci & Technol, Inst Artificial Intelligence, Wuhan 430074, Hubei, Peoples R China.

[Gao, Yunjun] Zhejiang Univ, Coll Comp Sci, Hangzhou 310027, Zhejiang, Peoples R China.

[Li, Qing] Hong Kong Polytech Univ, Dept Comp, Hong Kong, Peoples R China.

[Shu, Lihchyun] Natl Cheng Kung Univ, Coll Management, Tainan 701, Taiwan.

通讯机构：

[Gao, Y.] Z

Zhejiang University, China

语种：

英文

关键词：

Indexes;Costs;Amplitude shift keying;Databases;Binary trees;Roads;Query processing;Augmented spatial keyword queries;why-not questions;direction-aware;DAPC

期刊：

IEEE Transactions on Intelligent Transportation Systems

ISSN：

1524-9050

年：

2023

卷：

期：

页码：

4932-4947

DOI：

10.1109/TITS.2023.3238731

基金类别：

This work was supported in part by the National Natural Science Foundation of China under Grant 61972338 and Grant 62025206

机构署名：

本校为其他机构

院系归属：

计算机学院

摘要：

A direction-aware augmented spatial keyword top- k query (DAT kQ ) returns the top- k objects based on a ranking function that considers spatial distance, textual similarity, query numeric attributes, and query direction. When a user initiates a DAT kQ , some user-desired objects (missing objects) may not appear in the query result set, and then the user wonders why they do not appear, which is called the why-not question. This paper focuses on answering why-not questions on DAT k Qs. We first discuss how to obtain the refined query direction b...

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DAPC: Answering Why-Not Questions on Top-k Direction-Aware ASK Queries in Polar Coordinates

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