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Large language models (LLMs) increasingly rely on retrieving information from external corpora. This creates a new attack surface: indirect prompt injection (IPI), where hidden instructions are planted in the corpora and hijack model…

密码学与安全 · 计算机科学 2026-01-13 Hongyan Chang , Ergute Bao , Xinjian Luo , Ting Yu

Neural network representation learning for spatial data is a common need for geographic artificial intelligence (GeoAI) problems. In recent years, many advancements have been made in representation learning for points, polylines, and…

计算机视觉与模式识别 · 计算机科学 2022-10-03 Gengchen Mai , Chiyu Jiang , Weiwei Sun , Rui Zhu , Yao Xuan , Ling Cai , Krzysztof Janowicz , Stefano Ermon , Ni Lao

Deep learning based techniques have been recently used with promising results for data integration problems. Some methods directly use pre-trained embeddings that were trained on a large corpus such as Wikipedia. However, they may not…

数据库 · 计算机科学 2020-09-04 Riccardo Cappuzzo , Paolo Papotti , Saravanan Thirumuruganathan

Next Point-of-Interest (POI) prediction is a fundamental task in location-based services, especially critical for large-scale navigation platforms like AMAP that serve billions of users across diverse lifestyle scenarios. While recent POI…

信息检索 · 计算机科学 2026-02-12 Fangye Wang , Haowen Lin , Yifang Yuan , Siyuan Wang , Xiaojiang Zhou , Song Yang , Pengjie Wang

This study investigates the position bias in information retrieval, where models tend to overemphasize content at the beginning of passages while neglecting semantically relevant information that appears later. To analyze the extent and…

信息检索 · 计算机科学 2025-09-19 Ziyang Zeng , Dun Zhang , Jiacheng Li , Panxiang Zou , Yudong Zhou , Yuqing Yang

Concerns about data privacy are omnipresent, given the increasing usage of digital applications and their underlying business model that includes selling user data. Location data is particularly sensitive since they allow us to infer…

计算机与社会 · 计算机科学 2023-10-27 Nina Wiedemann , Ourania Kounadi , Martin Raubal , Krzysztof Janowicz

For several cancer patients, operative resection with curative intent can end up in early recurrence of the cancer. Current limitations in peri-operative cancer staging and especially intra-operative misidentification of visible metastases…

图像与视频处理 · 电气工程与系统科学 2023-06-21 Thomas Schnelldorfer , Janil Castro , Atoussa Goldar-Najafi , Liping Liu

As location-based services (LBS) have grown in popularity, more human mobility data has been collected. The collected data can be used to build machine learning (ML) models for LBS to enhance their performance and improve overall experience…

机器学习 · 计算机科学 2024-07-09 Kunlin Cai , Jinghuai Zhang , Zhiqing Hong , Will Shand , Guang Wang , Desheng Zhang , Jianfeng Chi , Yuan Tian

The scarcity of labeled data often impedes the application of deep learning to the segmentation of medical images. Semi-supervised learning seeks to overcome this limitation by exploiting unlabeled examples in the learning process. In this…

计算机视觉与模式识别 · 计算机科学 2021-06-25 Jizong Peng , Marco Pedersoli , Christian Desrosiers

POI tagging aims to annotate a point of interest (POI) with some informative tags, which facilitates many services related to POIs, including search, recommendation, and so on. Most of the existing solutions neglect the significance of POI…

计算机视觉与模式识别 · 计算机科学 2023-06-21 Jingsong Yang , Guanzhou Han , Deqing Yang , Jingping Liu , Yanghua Xiao , Xiang Xu , Baohua Wu , Shenghua Ni

Smartphones and portable devices have become ubiquitous and part of everyone's life. Due to the fact of its portability, these devices are perfect to record individuals' traces and life-logging generating vast amounts of data at low costs.…

机器学习 · 计算机科学 2019-04-23 Thiago Andrade , João Gama

The use of AI in public spaces continually raises concerns about privacy and the protection of sensitive data. An example is the deployment of detection and recognition methods on humans, where images are provided by surveillance cameras.…

计算机视觉与模式识别 · 计算机科学 2026-01-08 Christoph Liebender , Ranulfo Bezerra , Kazunori Ohno , Satoshi Tadokoro

Next Point-of-Interest (POI) recommendation is a longstanding problem across the domains of Location-Based Social Networks (LBSN) and transportation. Recent Recurrent Neural Network (RNN) based approaches learn POI-POI relationships in a…

信息检索 · 计算机科学 2020-10-15 Nicholas Lim , Bryan Hooi , See-Kiong Ng , Xueou Wang , Yong Liang Goh , Renrong Weng , Jagannadan Varadarajan

Approximate nearest neighbor (ANN) search is widely used in the retrieval stage of large-scale recommendation systems. In this stage, candidate items are indexed using their learned embedding vectors, and ANN search is executed for each…

Following a polynomial approach, many robust fixed-order controller design problems can be formulated as optimization problems whose set of feasible solutions is modelled by parametrized polynomial matrix inequalities (PMI). These…

最优化与控制 · 数学 2012-06-01 Didier Henrion , Jean Bernard Lasserre

Incorporating domain-specific priors in search and navigation tasks has shown promising results in improving generalization and sample complexity over end-to-end trained policies. In this work, we study how object embeddings that capture…

机器人学 · 计算机科学 2021-08-03 Vidhi Jain , Prakhar Agarwal , Shishir Patil , Katia Sycara

We present a new class of service for location based social networks, called the Flexible Group Spatial Keyword Query, which enables a group of users to collectively find a point of interest (POI) that optimizes an aggregate cost function…

社会与信息网络 · 计算机科学 2017-04-26 Sabbir Ahmad , Rafi Kamal , Mohammed Eunus Ali , Jianzhong Qi , Peter Scheuermann , Egemen Tanin

The problem of landmark recognition has achieved excellent results in small-scale datasets. When dealing with large-scale retrieval, issues that were irrelevant with small amount of data, quickly become fundamental for an efficient…

计算机视觉与模式识别 · 计算机科学 2018-06-18 Federico Magliani , Tomaso Fontanini , Andrea Prati

Due to the constant increase and versatility of IoT devices that should keep sensitive information private, Side-Channel Analysis (SCA) attacks on embedded devices are gaining visibility in the industrial field. The integration and…

密码学与安全 · 计算机科学 2021-01-21 Unai Rioja , Lejla Batina , Jose Luis Flores , Igor Armendariz

Indoor Positioning Systems (IPS) traditionally rely on odometry and building infrastructures like WiFi, often supplemented by building floor plans for increased accuracy. However, the limitation of floor plans in terms of availability and…

计算机视觉与模式识别 · 计算机科学 2024-03-13 Zhaoguang Yi , Xiangyu Wen , Qiyue Xia , Peize Li , Francisco Zampella , Firas Alsehly , Chris Xiaoxuan Lu