检索结果-内蒙古大学图书馆

International Conference on Guidance, Navigation and Control, ICGNC 2020

作者： Zhang, Jin Wang, Lizhi Quan, Weihong Li, Haoran Gong, Xiaoli College of Computer Science Nankai University Tianjin China College of Cyber Science Nankai University Tianjin China Tianjin Key Laboratory of Network and Data Security Technology Tianjin China

ISBN: (纸本)9789811581540

Aiming at obsolescence and deficiencies of the question bank in the current teaching of computer major courses, we propose a teaching method of student independent proposition, which can not only enrich the question bank as well as ensure the novelty of the exercises, but also effectively obtain feedback data of teaching quality based on the answers to exercises. In this paper, we first discuss the teaching significance of independent proposition and some key issues such as quality management encountered in practice. Then, we propose solutions to the problems of correctness checking and difficulty grading based on some natural language processing and deep learning technologies. Finally, to prove the effectiveness of our approach, we introduce the specific application in teaching practice, including the construction and use of the online education system based on the artificially constructed question bank. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Students

来源：评论

学校读者我要写书评

暂无评论

Integrating Structural Semantic Knowledge for Enhanced Information Extraction Pre-training

Integrating Structural Semantic Knowledge for Enhanced Infor...

引用

2024 Conference on Empirical Methods in Natural Language Processing, EMNLP 2024

作者： Yi, Xiaoyang Bao, Yuru Zhang, Jian Qin, Yifang Lin, Faxin College of Cyber Science Nankai University China College of Computer Science Nankai University China Tianjin Key Laboratory of Network and Data Security Technology China Key Laboratory of Data and Intelligent System Security Ministry of Education China

ISBN: (纸本)9798891761643

Information Extraction (IE), aiming to extract structured information from unstructured natural language texts, can significantly benefit from pre-trained language models. However, existing pre-training methods solely focus on exploiting the textual knowledge, relying extensively on annotated large-scale datasets, which is labor-intensive and thus limits the scalability and versatility of the resulting models. To address these issues, we propose SKIE, a novel pre-training framework tailored for IE that integrates structural semantic knowledge via contrastive learning, effectively alleviating the annotation burden. Specifically, SKIE utilizes Abstract Meaning Representation (AMR) as a low-cost supervision source to boost model performance without human intervention. By enhancing the topology of AMR graphs, SKIE derives high-quality cohesive subgraphs as additional training samples, providing diverse multi-level structural semantic knowledge. Furthermore, SKIE refines the graph encoder to better capture cohesive information and edge relation information, thereby improving the pre-training efficacy. Extensive experimental results demonstrate that SKIE outperforms state-of-the-art baselines across multiple IE tasks and showcases exceptional performance in few-shot and zero-shot settings. © 2024 Association for Computational Linguistics.

关键词： Computational linguistics

来源：评论

学校读者我要写书评

暂无评论

Iterative Bounded Distance Decoding with Random Flipping for Product-Like Codes

引用

IEEE Transactions on Communications 2024年第5期73卷 2864-2875页

作者： Li, Guorong Wang, Shiguo Zhao, Shancheng Jinan University National and Local Joint Research Center of Network Security Detection and Protection Technology College of Information Science and Technology Guangzhou510632 China Guangdong Key Laboratory of Data Security and Privacy Preserving The Guangzhou Key Laboratory of Data Security and Privacy Preserving Guangzhou510632 China Changsha University of Science and Technology Computer and Communication Engineering Institute Changsha410114 China

Product-like codes are widely used in high-speed communication systems since they can be decoded with low-complexity hard decision decoders (HDDs). To meet the growing demand of data rates, enhanced HDDs are required. In this paper, we propose a novel soft-aided HDD (SA-HDD), termed iterative bounded distance decoding with random flipping (iBDD-RF), for product-like codes. In iBDD-RF, the soft reliability of a bit is a weighted sum of the output of bounded distance decoder (BDD) and the channel log-likelihood ratio (LLR). When the amplitude of the soft reliability of a bit is less than a given threshold, it is flipped with a given probability. This random flipping may make the decoder escape from the local optimum. To optimize the threshold and the flipping probability, we derive the density evolution (DE) equations of iBDD-RF for product codes (PCs) and staircase codes (SCs). Our extensive numerical results show that iBDD-RF outperforms iBDD with scaled reliability (iBDD-SR) over the binary-input additive white Gaussian noise (Bi-AWGN) channel. Particularly, for a PC with (255,239,2) Bose-Chaudhuri-Hocquenghem (BCH) code and an SC with (254,230,3) BCH code, iBDD-RF performs about 0.25 dB and 0.28 dB better than iBDD-SR, respectively. © 2024 IEEE.

关键词： Optical fiber communication

来源：评论

学校读者我要写书评

暂无评论

Design and Implementation of Rumor Governance System Based on Blockchain 2

Design and Implementation of Rumor Governance System Based o...

引用

2nd International Conference on Computer Science and Blockchain, CCSB 2022

作者： Li, Yutong Song, Jiazhen Wang, Jingrong Lu, Haori Nie, Peng College of Cyber Science Nankai University Tianjin300350 China Nankai University College of Cyber Science Tianjin Key Laboratory of Network and Data Security Technology Tianjin300350 China

ISBN: (纸本)9798350331882

Nowadays, the network rumor is constantly breeding and spreading. It becomes a big difficulty to trace the source and refute the rumors with high efficiency. For this, we designed and implemented an intelligent rumor detection, source tracing and accurate rumor refuting system. This system has three main functions. First, the system provides credible evidence for the tracing and accountability of rumors with the immutable nature of blockchain. Second, we propose a new intelligent rumor detection model that does not involve manual work, that is, by looking for opposite semantic pairs. Third, a new accurate rumor refuting scheme is proposed, which can help break through the information cocoons. The system provides a standardized and effective management platform for the collaborative governance of online rumors in the new era and the improvement of the environment for online public opinion. It also facilitates the development of the Clear Action and the crackdown on online rumors. © 2022 IEEE.

关键词： Smart contract

来源：评论

学校读者我要写书评

暂无评论

Exploration on the key Issues of the Teaching Method of Student Independent Proposition

Exploration on the Key Issues of the Teaching Method of Stud...

引用

International Conference on Guidance, Navigation and Control, ICGNC 2020

作者： Zhang, Jin Quan, Weihong Li, Haoran Wang, Lizhi Gong, Xiaoli Wu, Qian College of Computer Science Nankai University Tianjin China College of Cyber Science Nankai University Tianjin China Tianjin Key Laboratory of Network and Data Security Technology Tianjin China Tianjin University of Science and Technology Tianjin China

ISBN: (纸本)9789811581540

In order to figure out the solutions to difficulties facing the university online education platform in the expansion of the question bank, this paper proposes a teaching method of student independent proposition that allows students to create exercises independently based on the content of the textbook. In view of the high cost of manual review of these student-created exercises, natural language processing and deep learning technologies are used to achieve automatic correctness checking. For the key issues encountered in the actual construction of the independent proposition system, a feasible solution is proposed. The research is of great significance to the construction and subsequent application of the question bank of the online education platform of universities. © 2022, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Students

来源：评论

学校读者我要写书评

暂无评论

Design and Implementation of Cyber Space Threat Detection System Based on User Behavioral Logs 3

Design and Implementation of Cyber Space Threat Detection Sy...

引用

3rd International Conference on Electronic Information Engineering and Computer Communication, EIECC 2023

作者： Wang, Wenhao Li, Hao Nie, Peng College of Cyber Science Nankai University Tianjin Key Laboratory of Network and Data Security Technology Tianjin China Science and Technology on Communication Networks Laboratory Shijiazhuang China College of Cyber Science Nankai University Tianjin China

ISBN: (纸本)9798350359961

In contemporary society, the role of networks in daily work and business activities is increasingly prominent. The enterprise intranet, serving as a crucial bridge for maintaining work stability, asset security, and business continuity, has garnered significant attention from both academia and industry in the field of intranet security detection. This study is based on the Log2Vec algorithm and involves the design and implementation of a Cyber Space Threat Detection System. The system, facilitated by the collaborative efforts of three modules-log ingestion, graph encoding, and security detection-effectively showcases user behavior, encodes logs into a heterogeneous graph, transforms the graph into vectors, and conducts cluster analysis to detect abnormal user behavior. Through in-depth research and systematic design, this study aims to provide enterprises with a more advanced and comprehensive intranet security detection solution to cope with evolving cybersecurity threats. © 2023 IEEE.

关键词： Cybersecurity Heterogeneous Graph Log2Vec

来源：评论

学校读者我要写书评

暂无评论

Leaky Autofill: An Empirical Study on the Privacy Threat of Password Managers’ Autofill Functionality 40

Leaky Autofill: An Empirical Study on the Privacy Threat of ...

引用

40th Annual Computer security Applications Conference, ACSAC 2024

作者： Fu, Yanduo Wang, Ding College of Cyber Science Nankai University Tianjin300350 China Ministry of Education Tianjin300350 China Tianjin Key Laboratory of Network and Data Security Technology Nankai University Tianjin300350 China

ISBN: (纸本)9798331520885

Password managers (PMs) provide users with convenient and robust functionalities to manage their credentials, highly recommended by security experts and major standard bodies. One of the most popular features is the autofill functionality, with which users need a single click or a few clicks to fill in every field in web forms, facilitating the process of completing web forms. However, such indiscriminate autofill brings severe privacy threats. PMs may inadvertently fill data into wrong fields in web forms, even hidden fields, potentially leading to privacy leaks and credential theft. In this paper, we conduct an empirical study evaluating the effectiveness of 30 popular PMs in identifying and handling hidden fields. We focus on the privacy threats posed by the autofill functionality, which fills data into hidden fields. We develop a semi-automated autofill testing tool and explore whether PMs autofill sensitive data into hidden fields across 15 concealment techniques and three web forms, including personal information, credit card, and login forms. Experimental results reveal that every PM autofills data into hidden fields in at least one web form, with an overall filled probability of 58.7% in 1032 scenarios. Further analysis reveals that login forms are the most vulnerable, with a 65.7% probability of hidden fields autofill. Hidden fields concealed by clip-path and content-visibility are filled with passwords by all PMs. Besides, built-in-browser PMs exhibit a 4.07 times higher likelihood of filling data into hidden fields than separately-installed PMs. Even more concerning, built-in-browser PMs, except Safari, autofill passwords into hidden fields under any concealment technique. 37.7% of autofill scenarios with insufficient user interaction pose heightened privacy threats, as users are unaware of autofill content. These privacy threats have been confirmed by popular PMs like LastPass. To mitigate the threats brought by the autofill functionality, we present two

关键词： Visual languages

来源：评论

学校读者我要写书评

暂无评论

Design and Implementation of Analyzer Management System Based on Elasticsearch 19th

Design and Implementation of Analyzer Management System Ba...

引用

19th International Conference on Web Information Systems and Applications, WISA 2022

作者： Sun, Jingqi Nie, Peng Xu, Licheng Zhang, Haiwei College of Cyber Science Nankai University Tianjin300350 China College of Computer Science Nankai University Tianjin300350 China Tianjin Key Laboratory of Network and Data Security Technology Tianjin China

ISBN: (纸本)9783031203084

Elasticsearch is one of the most popular full-text search and analytics engine. It can store, search, and analyze big volumes of data in near real time. Before searching, Elasticsearch will build multiple inverted indexes for the data. The analyzer plays a crucial role in this process. An appropriate analyzer can segment text into semantically meaningful words, which can significantly improve the query accuracy. However, the default analyzer has limited performance in the Chinese context. Existing methods generally replace the default analyzer with manual configuration to optimize the query effect. The cost of service downtime caused by manually updating analyzers is often unacceptable in production environments. Based on Elasticsearch’s Restful-API, we have implemented a framework for dynamic configuration of analyzers in a cluster environment. The framework supports common Chinese analyzers and provides a visual interface. Experiments show that the framework proposed in this paper reduces the update and maintenance time cost of the analyzer in the online environment by 94% compared to manual update. At the same time, compared with the default analyzer configuration of Elasticsearch, the accuracy of the system based on this framework is improved by 30%. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Information management

来源：评论

学校读者我要写书评

暂无评论

Heterogeneous Fault-Tolerant Aggregate Signcryption with Equality Test for Vehicular Sensor networks

引用

Computer Modeling in Engineering & Sciences 2023年第10期137卷 555-575页

作者： Yang Zhao Jingmin An Hao Li Saru Kumari Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of ChinaChengdu610054China Department of Mathematics Chaudhary Charan Singh UniversityMeerut250004India

The vehicular sensor network (VSN) is an important part of intelligent transportation, which is used for real-timedetection and operation control of vehicles and real-time transmission of data and information. In the environmentofVSN, massive private data generated by vehicles are transmitted in open channels and used by other vehicle users,so it is crucial to maintain high transmission efficiency and high confidentiality of data. To deal with this problem, inthis paper, we propose a heterogeneous fault-tolerant aggregate signcryption scheme with an equality test (HFTASET).The scheme combines fault-tolerant and aggregate signcryption,whichnot onlymakes up for the deficiency oflow security of aggregate signature, but alsomakes up for the deficiency that aggregate signcryption cannot tolerateinvalid signature. The scheme supports one verification pass when all signcryptions are valid, and it supportsunbounded aggregation when the total number of signcryptions grows dynamically. In addition, this schemesupports heterogeneous equality test, and realizes the access control of private data in different cryptographicenvironments, so as to achieve flexibility in the application of our scheme and realize the function of quick searchof plaintext or ciphertext. Then, the security of HFTAS-ET is demonstrated by strict theoretical analysis. Finally, weconduct strict and standardized experimental operation and performance evaluation, which shows that the schemehas better performance.

关键词： Aggregate signcryption fault-tolerant heterogeneous equality test vehicular sensor network

来源：评论

学校读者我要写书评

暂无评论

A Multi-user Shared Searchable Encryption Scheme Supporting SQL Query 3rd

A Multi-user Shared Searchable Encryption Scheme Supporting ...

引用

3rd International Conference on security and Privacy in New Computing Environments, SPNCE 2020

作者： Li, Mingyue Du, Ruizhong Jia, Chunfu College of Cyber Science Nankai University Tianjin300350 China Tianjin Key Laboratory of Network and Data Security Technology Nankai University Tianjin300350 China School of Cyber Security and Computer Hebei University Baoding071002 China

ISBN: (纸本)9783030669218

Due to the tremendous benefits of cloud computing, organizations are highly motivated to store electronic records on clouds. However, outsourcing data to cloud servers separates it from physical control, resulting in data privacy disclosure. Although encryption enhances data confidentiality, it also complicates the execution of encrypted database operations. In this paper, we propose a multi-user shared searchable encryption scheme that supports multi-user selective authorization and secure access to encrypted databases. First, we apply the Diffie-Hellman protocol to a trapdoor generate algorithm to facilitate fine-grained search control without incremental conversions. Second, we utilize a private key to generate an encrypted index by bilinear mapping, which makes it impossible for an adversary to obtain trapdoor keywords by traversing the keyword space and to carry out keyword guessing attacks. Third, we use double-layered encryption to encrypt a symmetric decryption key. Only the proxies whose attributes are matched with access control list can obtain the key of decrypted data. Through theoretical security analysis and experimental verifications, we show that our scheme can provide secure and efficacious ciphertext retrieval without the support of a secure channel. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： data privacy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：