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Knowledge graphs (KGs) consisting of triples are always incomplete, so it's important to do Knowledge Graph Completion (KGC) by predicting missing triples. Multi-Source KG is a common situation in real KG applications which can be viewed as…

Computation and Language · Computer Science 2020-10-27 Mingyang Chen , Wen Zhang , Zonggang Yuan , Yantao Jia , Huajun Chen

Knowledge graph embeddings rank among the most successful methods for link prediction in knowledge graphs, i.e., the task of completing an incomplete collection of relational facts. A downside of these models is their strong sensitivity to…

Machine Learning · Statistics 2019-07-03 Robert Bamler , Farnood Salehi , Stephan Mandt

The goal of representation learning of knowledge graph is to encode both entities and relations into a low-dimensional embedding spaces. Many recent works have demonstrated the benefits of knowledge graph embedding on knowledge graph…

Artificial Intelligence · Computer Science 2019-10-11 Wenqiang Liu , Hongyun Cai , Xu Cheng , Sifa Xie , Yipeng Yu , Hanyu Zhang

In recent years, we have witnessed the proliferation of knowledge graphs (KG) in various domains, aiming to support applications like question answering, recommendations, etc. A frequent task when integrating knowledge from different KGs is…

Databases · Computer Science 2023-06-08 Nikolaos Fanourakis , Vasilis Efthymiou , Dimitris Kotzinos , Vassilis Christophides

In this work, we propose a new and general framework to defend against backdoor attacks, inspired by the fact that attack triggers usually follow a \textsc{specific} type of attacking pattern, and therefore, poisoned training examples have…

Machine Learning · Computer Science 2021-11-30 Xiaofei Sun , Jiwei Li , Xiaoya Li , Ziyao Wang , Tianwei Zhang , Han Qiu , Fei Wu , Chun Fan

Knowledge graphs are graphical representations of large databases of facts, which typically suffer from incompleteness. Inferring missing relations (links) between entities (nodes) is the task of link prediction. A recent state-of-the-art…

Machine Learning · Computer Science 2019-09-12 Ivana Balažević , Carl Allen , Timothy M. Hospedales

The embedding of Biomedical Knowledge Graphs (BKGs) generates robust representations, valuable for a variety of artificial intelligence applications, including predicting drug combinations and reasoning disease-drug relationships.…

Databases · Computer Science 2023-10-17 Zhiguang Fan , Yuedong Yang , Mingyuan Xu , Hongming Chen

Discovery gene-disease links is important in biology and medicine areas, enabling disease identification and drug repurposing. Machine learning approaches accelerate this process by leveraging biological knowledge represented in ontologies…

Machine Learning · Computer Science 2025-04-14 Catarina Canastra , Cátia Pesquita

Graph-based agent memory is increasingly used in LLM agents to support structured long-term recall and multi-hop reasoning, but it also creates a new poisoning surface: an attacker can inject a crafted relation into graph memory so that it…

Cryptography and Security · Computer Science 2026-05-18 Yang Luo , Zifeng Kang , Tiantian Ji , Xinran Liu , Yong Liu , Shuyu Li , Lingyun Peng

We study the problem of learning representations of entities and relations in knowledge graphs for predicting missing links. The success of such a task heavily relies on the ability of modeling and inferring the patterns of (or between) the…

Machine Learning · Computer Science 2019-02-28 Zhiqing Sun , Zhi-Hong Deng , Jian-Yun Nie , Jian Tang

Recent studies have revealed a security threat to natural language processing (NLP) models, called the Backdoor Attack. Victim models can maintain competitive performance on clean samples while behaving abnormally on samples with a specific…

Computation and Language · Computer Science 2021-03-30 Wenkai Yang , Lei Li , Zhiyuan Zhang , Xuancheng Ren , Xu Sun , Bin He

Drug repurposing is more relevant than ever due to drug development's rising costs and the need to respond to emerging diseases quickly. Knowledge graph embedding enables drug repurposing using heterogeneous data sources combined with…

Since large knowledge bases are typically incomplete, missing facts need to be inferred from observed facts in a task called knowledge base completion. The most successful approaches to this task have typically explored explicit paths…

Artificial Intelligence · Computer Science 2018-04-24 Yelong Shen , Po-Sen Huang , Ming-Wei Chang , Jianfeng Gao

Knowledge graphs (KGs) are the key components of various natural language processing applications. To further expand KGs' coverage, previous studies on knowledge graph completion usually require a large number of training instances for each…

Computation and Language · Computer Science 2018-08-29 Wenhan Xiong , Mo Yu , Shiyu Chang , Xiaoxiao Guo , William Yang Wang

Representing entities and relations in an embedding space is a well-studied approach for machine learning on relational data. Existing approaches, however, primarily focus on improving accuracy and overlook other aspects such as robustness…

Machine Learning · Computer Science 2019-05-03 Pouya Pezeshkpour , Yifan Tian , Sameer Singh

This paper presents a novel approach to network management by integrating intent-based networking (IBN) with knowledge graphs (KGs), creating a more intuitive and efficient pipeline for service orchestration. By mapping high-level business…

Networking and Internet Architecture · Computer Science 2024-05-14 Kashif Mehmood , Katina Kralevska , David Palma

We study the effectiveness of Knowledge Graph Embeddings (KGE) for knowledge graph (KG) completion with rule mining. More specifically, we mine rules from KGs before and after they have been completed by a KGE to compare possible…

Machine Learning · Computer Science 2022-06-24 Johanna Jøsang , Ricardo Guimarães , Ana Ozaki

To provide more accurate, diverse, and explainable recommendation, it is compulsory to go beyond modeling user-item interactions and take side information into account. Traditional methods like factorization machine (FM) cast it as a…

Machine Learning · Computer Science 2019-06-11 Xiang Wang , Xiangnan He , Yixin Cao , Meng Liu , Tat-Seng Chua

Recommender system is an important component of many web services to help users locate items that match their interests. Several studies showed that recommender systems are vulnerable to poisoning attacks, in which an attacker injects fake…

Information Retrieval · Computer Science 2018-09-13 Minghong Fang , Guolei Yang , Neil Zhenqiang Gong , Jia Liu

Knowledge bases, and their representations in the form of knowledge graphs (KGs), are naturally incomplete. Since scientific and industrial applications have extensively adopted them, there is a high demand for solutions that complete their…

Artificial Intelligence · Computer Science 2025-07-30 Vítor Lourenço , Aline Paes