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New method of principle component analysis in network traffic

Jisuanji Gongcheng/computer engineering 2005年第19期31卷 54-55+66页

作者： Zhang, Bingyi Lan, Julong Bian, Yulan Sun, Yamin Li, Yufeng Zhang, Hongke College of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China Department of Computer Science Nanjing University of Science and Technology Nanjing 210094 China National Digital Switching System Engineering and Technological Research Center Zhengzhou 450002 China College of Information Science and Technology Wuhan University of Science and Technology Wuhan 430081 China

Traditional analysis method for network traffic is the scaled range statistic function (R/S). The results of R/S are not exact and cannot give an accurate judgment of whether the traffic model fitting actual traffic. In this paper the principle component analysis is imported into the network traffic analysis. It is used in computing Hurst parameter and analyzing the data based on different traffic model. It is used in analyzing the data based on the same traffic model with different parameters also. This method is useful and can conveniently give an accurate judgment for complex network traffic trace.

关键词： Network traffic analysis Principle component analysis Scaled range statistic function Traffic model

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A Methodology for Evaluating Decision Making Architectures for Automated Manufacturing systems

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IFAC Proceedings Volumes 1990年第8期23卷 321-326页

作者： R.Y. Al-Jaar A.A. Desrochers System Modeling Group Digital Equipment Corporation 4 Results Way MRO4-1/H17 Marlboro MA 01752-9122 USA Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy NY 12180-3590 USA

Controlling complex computer integrated manufacturing systems requires the design of an equally complex system of computers whose topology forms a real-time Decision Making Architecture (DMA) consisting of control, communication, and database functions, The purpose of the DMA is to ensure that production operations proceed on schedule, and to detect and correct any errors in real-time, The choice of a DMA greatly influences the performance of the overall manufacturing system. A generic methodology for evaluating DMAs is proposed. Each computer is modeled as a Decision Making Unit (DMU) using Generalized Stochastic Petri Nets (GSPNs). Each DMU represents the functions of a typical computer in a manufacturing environment. DMU modules serve as basic building blocks that can be easily interconnected to model any desired DMA. The measure of performance is the response time, and a procedure for computing it is described. Two- and three-level hierarchical DMAs are evaluated by automatically solving the equivalent Markov Chain of the GSPN model.

关键词： Performance evaluation Generalized Stochastic Petri Nets Markov models automated manufacturing systems decision making architectures hierarchical control architectures

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Evaluating the effectiveness of the use of teaching materials in video format in distance learning environments

Evaluating the effectiveness of the use of teaching material...

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Frontiers in Education (FIE) Conference

作者： Itana Stiubiener Regina M. Silveira Reinaldo Matushima Graça Bressan Wilson V. Ruggiero Mathematics Computing and Cogniton Center Universidade Federal do ABC Santo Andre Brazil Department of Computer and Digital System Engineering Escola Politécnica Universidade de São Paulo Sao Paulo Brazil

Projections indicate that video will be responsible for 90% of network traffic until the end of the decade. Considering the high cost of media production and, mainly, the high consumption of network resources for applications that explore it, it will be extremely important to monitor such use, preventing against wrong or distorted views of this consumption. Within this scenario, it is necessary to develop mechanisms and tools that provide a clear vision of video effectiveness consumption, as well as the measuring of “viewer engagement”. What tools can be developed to evaluate such consumption? What should be measured, i.e., which are the parameters and metrics necessary, and how can we obtain them, in order to measure the effectiveness of video applications use, for example in engineering courses and distance learning environments? These are some of the questions considered in this paper, especially evaluated within a scenario of video usage for teaching/learning purpose.

关键词： Streaming media Monitoring Materials Absorption Measurement Education Servers

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A high efficiency and multi-band/multi-mode power amplifier using a distributed second harmonic termination

A high efficiency and multi-band/multi-mode power amplifier ...

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作者： Kim, Jangheon Mkadem, Farouk Boumaiza, Slim Telecommunication System Division Digital Media and Communication Business Samsung Electronics Co. Ltd 416 Maetan 3-dong Yeongtong-gu Suwon-si Gyeonggi-do 443-742 Korea Republic of Department of Electrical and Computer Engineering University of Waterloo 200 University Ave West Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9782874870156

This paper proposes a new broadband saturated power amplifier (SPA) with a distributed second harmonic termination supporting multi-band/multi-mode operation. The proposed network is composed of a fundamental matching circuit and multiple second harmonic termination circuits. Due to the multiple harmonic terminations, the proposed PA improves the frequency range where the PA can achieve a high efficiency. The proposed PA is fabricated using a 45 W Cree CGH40045 GaN HEMT. Drain efficiencies of greater than 60% (average 66%) are achieved between about 1.8 GHz and 2.3 GHz (500 MHz bandwidth). When driven with long term evolution (LTE) and two carrier wideband code division multiple access (WCDMA) signals at DCS1800, PCS1900, and WCDMA bands, the linearity specifications of the corresponding standards are satisfied using the digital predistortion linearization technique, and it attains an efficiency of greater than 30%. © 2010 EuMA.

关键词： III-V semiconductors

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Energy Optimization for Cellular-Connected Multi-UAV Mobile Edge Computing systems with Multi-Access Schemes

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Journal of Communications and Information Networks 2018年第4期3卷 33-44页

作者： Meng Hua Yongming Huang Yi Wang Qingqing Wu Haibo Dai Lyuxi Yang School of Information Science and Engineering Southeast UniversityNanjing 210096China School of Electronics and Communication Engineering Zhengzhou University of AeronauticsZhengzhou 450046China National Digital Switching System Engineering and Technological Research Center Zhengzhou 450002China Department of Electrical and Computer Engineering National University of SingaporeSingapore School of Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China

In this paper,a cellular-connected unmanned aerial vehicle(UAV)mobile edge computing system is studied where several UAVs are associated to a terrestrial base station(TBS)for computation *** compute the large amount of data bits,a part of computation task is migrated to TBS and the other part is locally handled at *** goal is to minimize the total energy consumption of all UAVs by jointly adjusting the bit allocation,power allocation,resource partitioning as well as UAV trajectory under TBS’s energy *** deeply comprehending the impact of multi-UAV access strategy on the system performance,four access schemes in the uplink transmission is considered,i.e.,time division multiple access,orthogonal frequency division multiple access,one-by-one access and non-orthogonal multiple *** involved problems under different access schemes are all formulated in non-convex forms,which are difficult to be tackled *** solve this class of problem,the successive convex approximation technique is employed to obtain the suboptimal *** numerical results show that the proposed scheme save significant energy consumption compared with the benchmark schemes.

关键词： mobile edge computing UAV trajectory bit allocation power allocation resource partitioning energy minimization

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A Scheme for Authentication and Traceability of 5G Mobile Terminal Based on IPv6 and Blockchain

A Scheme for Authentication and Traceability of 5G Mobile Te...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Xinsheng Ji Ying Zhao Xingxing Liao Jie Yang Chunxiao Wang Department of Computer Science and Technology Tsinghua University Beijing China National Digital Switching System Engineering & Technological R&D Center Zhengzhou China Purple Mountain Laboratories Nanjing China School of Cyber Science and Engineering Southeast University Nanjing China

ISBN: (数字)9798350390643

ISBN: (纸本)9798350390650

To satisfy the service-side requirements for network layer authentication and traceability of users, this paper proposes a method for mobile terminal authentication and identity tracing based on IPv6 and blockchain. Our method introduces a new verification function (VEF) to verify the interface identification between the terminal and the 5G core network (5GC), thereby effectively enhancing the security of terminal access. Furthermore, considering the privacy protection of user identity information to prevent attackers from deducing encrypted content, it is necessary to periodically update encryption keys. Focusing on the practical deployment of VEFs on a network-wide scale and server-proximal for authentication and traceability, a time-varying key sharing scheme based on blockchain is proposed. The experimental section analyzes the communication performance and security of the proposed scheme, showing that our scheme does not significantly degrade the original network performance while providing substantial security gains.

关键词： Wireless communication Privacy 5G mobile communication Authentication Signal processing User experience Blockchains Synchronization Noise measurement Protection

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Investigation of Creating Accessibility Linked Data Based on Publicly Available Accessibility Datasets 23

Investigation of Creating Accessibility Linked Data Based on...

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Proceedings of the 2023 13th International Conference on Communication and Network Security

作者： Yufeng Li Xu Yan Mingxuan Xiao Weimin Wang Fei Zhang Department of Digital Information Technology Zhejiang Technical Institute of Economics China and Department of Electronics and Computer Science University of Southampton United Kingdom Department of Computer Science Trine University USA Department of Computer Science McDonald (China) Co. Ltd. China and Department of Computer Science SouthWest JiaoTong University China Department of Computer Science Alibaba International China and School of Engineering Hong Kong University of Science and Technology China Department of Computer Science Trine University USA and Department of Geographic Information System Yangtze University China

ISBN: (纸本)9798400707964

With the fast growth of web, the web is full of diverse data. Linked Data is data on the web that gives URIs to entities and links different data from different domains together, which results in the part of the web infrastructure. Since the dramatic development of Linked Data movement, a great number of accessibility datasets have been published as open data on the web by governments or organizations so that they can be accessed and reused by anyone without any restriction. However, the majority of the accessibility datasets available on the web are in diverse formats such as HTML table, Excel and CSV, rather than Linked Data format – RDF. This paper mainly investigates the method of creating accessibility Linked Data based on the publicly existing available accessibility datasets. First of all, requested accessibility data was extracted from the accessibility dataset. Moreover, Jena RDF API is applied to create RDF documents based on the extracted data from the accessibility dataset. Compared to other approaches such as transforming XML to RDF via schema, current method of this project does not have mapping work and it shows significant convenience. Finally, a triple store was set up to sever the RDF documents. In addition, the server has query interface support for test; as a result, users could query the data they need. In the future development, relevant dataset links would be added to current RDF documents. At last the accessibility RDF dump would be published on the web as a part of the web infrastructure. Index Terms—Linked Data, Open Data, Semantic Web, Accessibility Dataset.

关键词： Accessibility Dataset. Linked Data Open Data Semantic Web

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An intelligent cylindrical reflector for airborne virus detection

An intelligent cylindrical reflector for airborne virus dete...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Ahmed Hadded Mossaad Ben Ayed Shaya A. Alshaya National Engineering School Of Sfax Sfax University Computer and Embedded System Laboratory Sfax Tunisia Electronic Industrial ENISo Sousse University Tunsia Computer and Embedded System Laboratory ENIS Sfax University Tunisia Sfax Tunisia Department of Computer Science Faculty of Sciences and Humanities Sciences Majmaah University Dean of Digital Transformation and e-Transactions Prince Sultan University Majmaah Saudi Arabia

In 2020, the world suffered from the COVID-19 pandemic. This situation highlighted the considerable need for systems to detect viruses quickly. Providing an accurate e-health system that detects, monitors, and controls virus spread became necessary. Countries attempt to reduce the virus's spread using basic processes such as quarantine and lockdown. Early virus detection is requested to reduce the threat and decrease the propagation of the pandemic. This paper proposes an attempt to avoid speed-up spreading based on airborne virus detection. The suggested detection based on the SiNW-FET biosensor is not approved as a standardized diagnostic test. To support the airborne detection methodology, a metasurface technology based on Reflector cylindrical antenna with a sensing unit is proposed to detect viruses. The proposal considered the propagation delays and concentration of a virus. Conducted results prove that the receiver's volume is considered a primary key to an accurate detection rather than the virus's concentration.

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An intelligent guided-airborne virus detection

An intelligent guided-airborne virus detection

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International Conference on Sciences and Techniques of Automatic Control and computer engineering (STA)

作者： Ahmed Hadded Mossaad Ben Ayed Shaya A. Alshaya Computer and Embedded System Laboratory National Engineering School Of Sfax Sfax University Sfax Tunisia Electronic Industrial ENISoSousse University Tunisia Computer and Embedded System Laboratory ENIS Sfax University Tunisia Sfax Tunisia Department of computer science Faculty of sciences and humanities sciences Majmaah University Dean of digital transformation and e-transactions Prince Sultan University Majmaah Saudi Arabia

ISBN: (纸本)9781665482622

Health has recently faced many challenges, including improving a healthy environment and reducing human life's dangers and economic crises. The last pandemic COVID-19 had badly affected survivor sectors with infection and lockdown exigence. Scientists proposed several solutions to reduce the negative impact of a such pandemic by proposing systems for earlier detection of viruses. The use of metamaterials as an emerging technology in the biosensors field allows a high accuracy. This paper presents a method for detecting and capturing airborne viruses using metasurface technology. The goal is to develop a system that can identify and capture these viruses using FET sensors. The accuracy of the detection is tied to the concentration of aerosols. The model proposes a guided flow of aerosols that positively impacts the detection of viruses through the FET biosensor. The simulation results based on Concentration and airflow velocity delays prove the proposed model's performance.

关键词： COVID-19 computer viruses Pandemics Atmospheric modeling Biological system modeling Field effect transistors Aerosols

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Evaluating the Performance to Detecting Topic Shift of Large Language Models: A Study 9

Evaluating the Performance to Detecting Topic Shift of Large...

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9th International Conference on Intelligent Computing and Signal Processing, ICSP 2024

作者： Tian, Pingfang Liu, Deting Department of Computer Science and Technology Wuhan University of Science and Technology Wuhan430065 China Institute of Scientific and Technical Information of China The Key Laboratory of the Rich Media Knowledge Organisation and Service of Digital Publishing Content Beijing100038 China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan China Big Data Science and Engineering Research Institute Wuhan University of Science and Technology Wuhan430065 China

ISBN: (纸本)9798350376548

Topic shift detection aims to identify whether there is a change in the current topic of conversation or if a change is needed. The study found previous work did not evaluate the performance of large language models like ChatGPT on the task of topic shift. Therefore, this paper's main task and innovation lie in analyzing ChatGPT's performance on topic shift detection. To provide a more comprehensive evaluation, we conducted topic shift detection tasks on ChatGPT from three aspects: single utterances, adjacent utterances, and contextual levels. Additionally, to gauge the performance of large language models, we conducted experiments on multiple small-scale models and compared the results of the two models. Experimental results on the publicly available English TIAGE dataset showed that small-scale models exhibited lower recall in all three aspects, while ChatGPT performed better in the recall. This suggests that compared to small-scale models, large models are more capable of accurately detecting topic shifts. However, large models also exhibited lower precision, indicating that while ChatGPT can recognize content differences in utterances, its judgment on whether these different contents belong to the same topic is poor. © 2024 IEEE.

关键词： adjacent utterances level ChatGPT contextual level single utterances level topic shift detection

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