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Efficient subtree results computation for XML keyword queries

Frontiers of computer Science 2015年第2期9卷 253-264页

作者： Ziyang CHEN School of Information Science and Engineering Yanshan University Hebei 066004 China Environmental Management College of China Hebei 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of HeBei Province Yanshan University Hebei 066004 China

In this paper, we focus on efficient construction of restricted subtree （RSubtree） results for XML keyword queries on a multicore system. We firstly show that the perfor- mance bottlenecks for existing methods lie in 1） computing the set of relevant keyword nodes （RKNs） for each subtree root node, 2） constructing the corresponding RSubtree, and 3） parallel execution. We then propose a two-step generic top-down subtree construction algorithm, which computes SLCA/ELCA nodes in the first step, and parallelly gets RKNs and generates RSubtree results in the second step, where generic means that 1） our method can be used to compute dif- ferent kinds of subtree results, 2） our method is independent of the query semantics; top-down means that our method con- structs each RSubtree by visiting nodes of the subtree con- structed based on an RKN set level-by-level from left to right, such that to avoid visiting as many useless nodes as possible. The experimental results show that our method is much more efficient than existing ones according to various metrics.

关键词： XML SLCA/ELCA RSubtree RKNs parallel

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Enhancing encrypted traffic analysis via source APIs: A robust approach for malicious traffic detection

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computers and Security 2025年 156卷

作者： Lin, Wanshuang Xia, Chunhe Wang, Tianbo Liu, Mengyao Li, Yang School of Cyber Science and Technology Beihang University Beijing100191 China Key Laboratory of Beijing Network Technology Beihang University Beijing100191 China Guangxi Collaborative Innovation Center of MultiSource Information Integration and Intelligent Processing Guangxi Normal University Guilin541004 China

The widespread adoption of encryption protocols has increased the complexity of detecting malicious Android traffic. By randomizing payload content, encryption obscures semantically explicit features in network traffic, thereby concealing its behavioral intent. Although existing methods mitigate this issue by expanding feature sets or extracting spatiotemporal patterns, they do not fundamentally reconstruct the original payload semantics. In this paper, we propose RATD, a detection model that enhances encrypted traffic representation by introducing semantics of source-APIs. This approach leverages the correlation between system API calls made prior to traffic transmission (referred to as source APIs) and the behavioral intent within encrypted traffic, thereby compensating for semantic loss. First, we construct API-traffic association samples by monitoring network connection APIs. Then, we transform the API sequences into graphs and apply a Graph Convolutional network (GCN) to learn their structural and semantic representations. These features are fused with corresponding traffic features through a multi-source encoder module. Finally, to address the challenges of limited data availability in real-world deployment, we introduce a representation enhancement module to improve model's robustness in scenarios with missing data. Experimental results show that RATD is significantly better than the state-of-the-art models across multiple datasets. In particular, in scenarios with missing API data, the accuracy of our model decreases by at most 2.9%, showing a stronger environmental adaptability. © 2025

关键词： HTTP

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Reliability Assessment of a New General Matching Composed network

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China Communications 2024年第2期21卷 245-257页

作者： Zhengyuan Liang Junbin Liang Guoxuan Zhong Guangxi Key Laboratory of Multimedia Communications and Network Technology School of ComputerElectronics and InformationGuangxi UniversityNanning 530004China Jiangxi Engineering Laboratory of IoT Technologies for Crop Growth Ji’an 343000China

The reliability of a network is an important indicator for maintaining communication and ensuring its stable operation. Therefore, the assessment of reliability in underlying interconnection networks has become an increasingly important research issue. However, at present, the reliability assessment of many interconnected networks is not yet accurate,which inevitably weakens their fault tolerance and diagnostic capabilities. To improve network reliability,researchers have proposed various methods and strategies for precise assessment. This paper introduces a novel family of interconnection networks called general matching composed networks(gMCNs), which is based on the common characteristics of network topology structure. After analyzing the topological properties of gMCNs, we establish a relationship between super connectivity and conditional diagnosability of gMCNs. Furthermore, we assess the reliability of g MCNs, and determine the conditional diagnosability of many interconnection networks.

关键词： conditional diagnosability interconnection networks network reliability super connectivity

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Make your webpage carry abundant secret information unawarely

Make your webpage carry abundant secret information unawarel...

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15th IEEE International Conference on High Performance Computing and Communications, HPCC 2013 and 11th IEEE/IFIP International Conference on Embedded and Ubiquitous Computing, EUC 2013

作者： Guo, Xiaojun Cheng, Guang Zhu, Chengang Zhou, Aiping Pan, Wubin Truong, Dinhtu School of Computer Science and Engineering Southeast University Nanjing 210096 China School of Information Engineering Tibet Nationalities Institute Xianyang 712082 China Key Laboratory of Computer Network and Information Integration Southeast University Nanjing 210096 China

ISBN: (纸本)9780769550886

How to embed more secret message into web page with keeping good imperceptibility simultaneously is a trade-off problem for information hiding schemes. This paper presents a novel web page information hiding method based on three inherent features of current web page's HTML Code matrix. This method firstly exploits chaotic transform to deal with secret message, then embeds each bit of secret message into cover web page according to the random odevity of character amount contained by each row(column) in cover web page's HTML code matrix. Its process is very simple to understand and easy to implement. It can improve the largest embedded capacity (LEC) of cover web page greatly with keeping good imperceptibility at the same time. We test our approach on two test data sets which include 1000 web pages in total. The experiment results show that the max LECs for these two data sets are up to 11291 bits and 13545 bits respectively. The average LECs for two data sets has improvement of 80.2% and 24% more than that of other web page information hiding method. © 2013 IEEE.

关键词： HTML

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Web service selection with quantitative and qualitative user preferences

Web service selection with quantitative and qualitative user...

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2011 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2011

作者： Wang, Hongbing Liu, Weihong Key Lab of Computer Network and Information Integration School of Computer Science and Engineering Southeast University 211189 China School of Computer Science Anhui Unversity of Technology 243002 China

ISBN: (纸本)9780769545134

Most existing approaches of Web service selection with user preferences are either quantitative or qualitative. However, using a qualitative or quantitative approach alone cannot handle all the non-functional properties(NFPs). To solve this problem, we present an approach of service selection with quantitative and qualitative user preferences, where qualitative preferences are modeled as a TCP-net and quantitative preferences are specified by using arbitrary positive numbers. Our approach consists of two steps, that is, qualitative selection based on qualitative preferences and quantitative selection based on quantitative preferences. We prove its effectiveness and verify its efficiency through extensive experiments. © 2011 IEEE.

关键词： Websites

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Covert Communications with Enhanced Physical Layer Security in RIS-Assisted Cooperative networks

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IEEE Transactions on Wireless Communications 2025年

作者： Li, Xingwang Liu, Musen Dang, Shuping Luong, Nguyen Cong Yuen, Chau Nallanathan, Arumugam Niyato, Dusit Henan Polytechnic University School of Physics and Electronic Information Engineering Jiaozuo454003 China Southeast University National Mobile Communications Research Laboratory Nanjing210096 China Jiaozuo Key Laboratory of Crow-Sensing Network Jiaozuo454003 China University of Bristol School of Electrical Electronic and Mechanical Engineering BristolBS8 1UB United Kingdom Phenikaa University Faculty of Computer Science Hanoi12116 Viet Nam Nanyang Technological University Singapore School of Electrical and Electronics Engineering 639798 Singapore Queen Mary University of London School of Electronic Engineering and Computer Science London United Kingdom Kyung Hee University Department of Electronic Engineering Gyeonggi-do Yongin-si17104 Korea Republic of Nanyang Technological University Singapore College of Computing and Data Science 639798 Singapore

Reconfigurable intelligent surface (RIS) and ambient backscatter communication (AmBC) technologies are recognized for their programmability and high energy efficiency respectively, which will be the key parts of the future sixth generation (6G) mobile communication technology. The combination of the two technologies can improve communication security by reducing the probability of detection and decoding through enhanced transmission and backscatter transmission in different communication slots. In this paper, a dual-function RIS that supports cooperative relaying for covert communications is proposed. It operates in different communication slots (enhanced transmission slot and backscatter slot), but the performance is affected by phase errors due to function switching. A source covertly communicates with an intended destination via the help of RIS and cooperative relay. There is an illegal monitor aims to detect and eavesdrop the covert message. For this system, the outage probability (OP), intercept probability (IP), and detection error probability (DEP) in different communication slots are derived to examine the system reliability and security. Moreover, the system security probability (SSP) is proposed, and a block coordinated ascent (BCA)-based iterative algorithm is used to jointly optimize the power allocation coefficients to maximize the SSP. Simulation results show that increasing the number of elements can improve the security performance and mitigate the negative impact of RIS phase errors. © 2002-2012 IEEE.

关键词： Mobile telecommunication systems

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Analysis and Improvement of an Efficient Controlled Quantum Secure Direct Communication and Authentication Protocol

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computers, Materials & Continua 2018年第12期57卷 621-633页

作者： Jifeng Zhong Zhihao Liu Juan Xu Navigation College Jimei UniversityXiamen361021China School of Computer Science and Engineering Southeast UniversityNanjing211189China Key Laboratory of Computer Network and Information Integration Southeast UniversityMinistry of EducationNanjing211189China Institute for Quantum Computing University of WaterlooWaterlooONCanadaN2L3G1

The controlled quantum secure direct communication(CQSDC)with authentication protocol based on four particle cluster states via quantum one-time pad and local unitary operations is *** is found that there are some serious security issues in this *** eavesdropper(Eve)can eavesdrop on some information of the identity strings of the receiver and the controller without being detected by the selective-CNOT-operation(SCNO)*** the same attack,Eve can also steal some information of the secret message that the sender *** addition,the receiver can take the same kind of attack to eavesdrop on some information of the secret message out of the control of the *** means that the requirements of CQSDC are not *** last,we improve the original CQSDC protocol to a secure one.

关键词： Quantum cryptography controlled quantum secure direct communication selective-CNOT-operation attack

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An Ensemble Detection Method for Shilling Attacks Based on Features of Automatic Extraction

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China Communications 2019年第8期16卷 130-146页

作者： Yaojun Hao Fuzhi Zhang Jinbo Chao School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Qinhuangdao 066004China Department of Computer Science and Technology Xinzhou Teachers UniversityXinzhou 034000China

Faced with the evolving attacks in recommender systems, many detection features have been proposed by human engineering and used in supervised or unsupervised detection methods. However, the detection features extracted by human engineering are usually aimed at some specific types of attacks. To further detect other new types of attacks, the traditional methods have to re-extract detection features with high knowledge cost. To address these limitations, the method for automatic extraction of robust features is proposed and then an Adaboost-based detection method is presented. Firstly, to obtain robust representation with prior knowledge, unlike uniform corruption rate in traditional mLDA(marginalized Linear Denoising Autoencoder), different corruption rates for items are calculated according to the ratings’ distribution. Secondly, the ratings sparsity is used to weight the mapping matrix to extract low-dimensional representation. Moreover, the uniform corruption rate is also set to the next layer in mSLDA(marginalized Stacked Linear Denoising Autoencoder) to extract the stable and robust user features. Finally, under the robust feature space, an Adaboost-based detection method is proposed to alleviate the imbalanced classification problem. Experimental results on the Netflix and Amazon review datasets indicate that the proposed method can effectively detect various attacks.

关键词： shilling attack ensemble detection features of automatic extraction marginalized linear denoising autoencoder

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Inference rules based on XML functional dependency and XML multi-valued dependency

Inference rules based on XML functional dependency and XML m...

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2014 International Conference on Future information Engineering and Manufacturing Science(FIEMS 2014)

作者： Zhongping Zhang Shanshan Shi The School of Information Science and Engineering Yanshan University The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province

ISBN: (纸本)9781138026445

There not only exists the relation of the functional dependency and multi-valued dependency in XML data constraint,but also exists the relation of data dependency obtained only from a certain existing relationship instance that is *** reducing data redundancy,in this paper,the concepts of XML functional dependency and XML multi-valued dependency based on the path expression in the Document Type Definition are *** then the inference rules on the condition of the coexistence of functional dependency and multi-valued dependency in XML are ***,the validity and completeness of the inference rules are *** above-mentioned fundamentally solves the problems of implication of functional dependency and multi-valued dependency in XML data,laying a theoretical foundation for XML database design.

关键词： Extensible Markup Language inference rules functional dependency multi-valued dependency

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Conflict-based belief revision operators in possibilistic logic 26

Conflict-based belief revision operators in possibilistic lo...

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26th AAAI Conference on Artificial Intelligence and the 24th Innovative Applications of Artificial Intelligence Conference, AAAI-12 / IAAI-12

作者： Qi, Guilin Wang, Kewen Key Laboratory of Computer Network and Information Integration of State Education Ministry School of Computer Science and Engineering Southeast University China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 China School of Computing and Information Technology Griffith University Australia

ISBN: (纸本)9781577355687

In this paper, we investigate belief revision in possibilistic logic, which is a weighted logic proposed to deal with incomplete and uncertain information. Existing revision operators in possibilistic logic are restricted in the sense that the input information can only be a formula instead of a possibilistic knowledge base which is a set of weighted formulas. To break this restriction, we consider weighted prime implicants of a possibilistic knowledge base and use them to define novel revision operators in possibilistic logic. Intuitively, a weighted prime implicant of a possibilistic knowledge base is a logically weakest possibilistic term (i.e., a set of weighted literals) that can entail the knowledge base. We first show that the existing definition of a weighted prime implicant is problematic and need a modification. To define a revision operator using weighted prime implicants, we face two problems. The first problem is that we need to define the notion of a conflict set between two weighted prime implicants of two possibilistic knowledge bases to achieve minimal change. The second problem is that we need to define the disjunction of possibilistic terms. We solve these problems and define two conflict-based revision operators in possibilistic logic. We then adapt the well-known postulates for revision proposed by Katsuno and Mendelzon and show that our revision operators satisfy four of the basic adapted postulates and satisfy two others in some special cases. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Problem solving

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