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ON QUADRATURE OF HIGHLY OSCILLATORY FUNCTIONS

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Journal of Computational Mathematics 2006年第5期24卷 579-590页

作者： Shu-huang Xiang Yong-xiong Zhou department of Applied Mathematics and software Central South University Changsha 410083 China

Some quadrature methods for integration of ∫a^bf（x）e^iwg（x）dx for rapidly oscillatory functions are presented. These methods, based on the lower order remainders of Taylor expansion and followed the thoughts of Stetter [9], Iserles and NФrsett [5], are suitable for all w and the decay of the error can be increased arbitrarily in case that g＇（x）≠0 for x∈[a, b], and easy to be implemented and extended to the improper integration and the general case I[f]=∫a^b f（x）e^ig（w,x）dx.

关键词： Oscillatory integral quadrature Filon-type method Taylor expansion.

A constructive model for collective intelligence

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National Science Review 2020年第8期7卷 1273-1277页

作者： Wei Zhang Hong Mei Key Laboratory of High Confidence software Technology (Peking University) Ministry of Education Institute of software Department of Computer Science and Technology Peking University

Natural phenomena of collective intelligence(CI) occurring in physical space show a potential approach to effective large-scale human collaboration in cyberspace. Based on existing explanatory understanding of CI, this perspective proposes a constructive model for building artificial CI systems, i.e., problem-oriented CI phenomena with AI-powered information integration and feedback.

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Adaptive Partial Task Offloading and Virtual Resource Placement in SDN/NFV-Based Network Softwarization

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Computer Systems Science & Engineering 2023年第5期45卷 2141-2154页

作者： Prohim Tam Sa Math Seokhoon Kim department of software Convergence Soonchunhyang UniversityAsan31538Korea department of Computer software Engineering Soonchunhyang UniversityAsan31538Korea

Edge intelligence brings the deployment of applied deep learning(DL)models in edge computing systems to alleviate the core backbone network *** setup of programmable software-defined networking(SDN)control and elastic virtual computing resources within network functions virtualization(NFV)are cooperative for enhancing the applicability of intelligent edge *** offer advancement for multi-dimensional model task offloading in edge networks with SDN/NFV-based control softwarization,this study proposes a DL mechanism to recommend the optimal edge node selection with primary features of congestion windows,link delays,and allocatable bandwidth *** partial task offloading policy considered the DL-based recommendation to modify efficient virtual resource placement for minimizing the completion time and termination drop *** optimization problem of resource placement is tackled by a deep reinforcement learning(DRL)-based policy following the Markov decision process(MDP).The agent observes the state spaces and applies value-maximized action of available computation resources and adjustable resource allocation *** reward formulation primarily considers taskrequired computing resources and action-applied allocation *** defined policies of resource determination,the orchestration procedure is configured within each virtual network function(VNF)descriptor using topology and orchestration specification for cloud applications(TOSCA)by specifying the allocated *** simulation for the control rule installation is conducted using Mininet and Ryu SDN *** delay and task delivery/drop ratios are used as the key performance metrics.

关键词： Deep learning partial task offloading software-defined networking virtual machine virtual network functions

A novel fully differential telescopic operational transconductance amplifier

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Journal of Semiconductors 2009年第8期30卷 116-118页

作者：李天望叶波江金光 department of Integrated Circuits and Communication software International School of SoftwareWuhan University Faculty of Computer & Information Engineering Shanghai University of Electric Power

A novel fully differential telescopic operational transconductance amplifier （OTA） is proposed. An additional PMOS differential pair is introduced to improve the unit-gain bandwidth of the telescopic amplifier. At the same time, the slew rate is enhanced by the auxiliary slew rate boost circuits. The proposed OTA is designed in a 0.18 μm CMOS process. Simulation results show that there is a 49% improvement in the unit-gain bandwidth compared to that of a conventional OTA; moreover, the DC gain and the slew rate are also enhanced.

关键词： OTA fully differential unit-gain bandwidth slew rate

Multi-Hop Transmission Method of 5G Millimeter Wave Relay Based on Network Coding

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China Communications 2022年第12期19卷 14-26页

作者： Yilin Wang Weisheng He Xuwei Fan Lianfen Huang Jie Yang Yuliang Tang School of Information Xiamen UniversityXiamen 361005China department of software Engineering Xiamen Institute of Software TechnologyXiamen 361005China

With the rapid development of the Internet technology,millimeter wave(mmWave)will be used as a supplement to 5G low frequency bands to meet the extremely high system capacity requirements of 5G in hot *** 5G mmWave communication can adapt to the needs of 5G network and carry a large amount of transmitted data,transmission stability has become one of the key technical issues of 5G network mmWave communication due to problems such as strong attenuation and poor penetration of *** order to improve the efficiency of the mmWave multi-hop transmission,we propose a 5G mmWave multi-hop transmission method based on network coding,which can adapt to the current wireless network environment,improve spectrum efficiency and increase network *** on MATLAB simulation experiments,it is verified that the proposed method can greatly improve the transmission efficiency and reduce the signal loss under the premise of ensuring the accurate signal transmission.

关键词： 5G network millimeter wave relay multihop communication network coding

Misleading classification

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Science China(Information Sciences) 2014年第5期57卷 103-119页

作者： JIANG He XUAN JiFeng REN ZhiLei WU YouXi WU XinDong School of software Dalian University of Technology School of Computer Science and software Hebei University of Technology Computer Science department University of Vermont

In this paper,we investigate a new problem–misleading classification in which each test instance is associated with an original class and a misleading *** goal for the data owner is to form the training set out of candidate instances such that the data miner will be misled to classify those test instances to their misleading classes rather than original *** discuss two cases of misleading *** the case where the classification algorithm is unknown to the data owner,a KNN based Ranking Algorithm(KRA)is proposed to rank all candidate instances based on the similarities between candidate instances and test *** the case where the classification algorithm is known,we propose a Greedy Ranking Algorithm(GRA)which evaluates each candidate instance by building up a classifier to predict the test *** addition,we also show how to accelerate GRA in an incremental way when naive Bayes is employed as the classification *** on 16 UCI data sets indicated that the ranked candidate instances by KRA can achieve promising leaking and misleading *** the classification algorithm is known,GRA can dramatically outperform KRA in terms of leaking and misleading rates though more running time is required.

关键词： misleading classification naive Bayes K-nearest neighbor

Economical Requirements Elicitation Techniques During COVID-19: A Systematic Literature Review

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Computers, Materials & Continua 2021年第5期67卷 2665-2680页

作者： Tauqeer ul Amin Basit Shahzad Fazal-e-Amin Muhammad Shoaib department of software Engineering National University of Modern LanguagesIslamabadPakistan department of software Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia

Requirements elicitation is a fundamental phase of software development in which an analyst discovers the needs of different stakeholders and transforms them into *** phase is cost-and time-intensive,and a project may fail if there are excessive costs and schedule ***-19 has affected the software industry by reducing interactions between developers and *** a lack of interaction is a key reason for the failure of software *** can also fail when customers do not know precisely what they ***,selecting the unsuitable elicitation technique can also cause project *** present study,therefore,aimed to identify which requirements elicitation technique is the most cost-effective for large-scale projects when time to market is a critical issue or when the customer is not *** that end,we conducted a systematic literature review on requirements elicitation *** primary studies identified introspection as the best technique,followed by survey and *** finding suggests that introspection should be the first choice of elicitation technique,especially when the customer is not available or the project has strict time and cost ***,introspection should also be used as the starting point in the elicitation process of a large-scale project,and all known requirements should be elicited using this technique.

关键词： COVID-19 software engineering requirements engineering requirements elicitation introspection project failure SLR on elicitation techniques large-scale projects economical elicitation techniques costeffective time constraints

Intelligent Agent-Based System for Digital Library Information Retrieval

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Journal of Beijing Institute of Technology 2003年第4期12卷 450-454页

作者：师雪霖牛振东宋瀚涛宋丽哲 department of Computer Science and Engineering School of software

A new information search model is reported and the design and implementation of a system based on intelligent agent is presented. The system is an assistant information retrieval system which helps users to search what they need. The system consists of four main components: interface agent, information retrieval agent, broker agent and learning agent. They collaborate to implement system functions. The agents apply learning mechanisms based on an improved ID3 algorithm.

关键词： intelligent agent information retrieval agent cooperation machine learning

A survey on communication protocols and performance evaluations for Internet of Things

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Digital Communications and Networks 2022年第6期8卷 1094-1104页

作者： Cüneyt Bayılmış MAli Ebleme ÜnalÇavuşoğlu Kerem Küçük Abdullah Sevin department of Computer Engineering Sakarya UniversitySerdivanSakaryaTurkey Institute of Natural Science Sakarya UniversitySakaryaTurkey department of software Engineering Sakarya UniversitySerdivanSakaryaTurkey department of software Engineering Kocaeli UniversityKocaeliTurkey

The Internet of Things (IoT) is a large-scale network of devices capable of sensing, data processing, and communicating with each other through different communication protocols. In today's technology ecosystem, IoT interacts with many application areas such as smart city, smart building, security, traffic, remote monitoring, health, energy, disaster, agriculture, industry. The IoT network in these scenarios comprises tiny devices, gateways, and cloud platforms. An IoT network is able to keep these fundamental components in transmission under many conditions with lightweight communication protocols taking into account the limited hardware features (memory, processor, energy, etc.) of tiny devices. These lightweight communication protocols affect the network traffic, reliability, bandwidth, and energy consumption of the IoT application. Therefore, determining the most proper communication protocol for application developers emerges as an important engineering problem. This paper presents a straightforward overview of the lightweight communication protocols, technological advancements in application layer for the IoT ecosystem. The survey then analyzes various recent lightweight communication protocols and reviews their strengths and limitations. In addition, the paper explains the experimental comparison of Constrained Applications Protocol (CoAP), Message Queuing Telemetry (MQTT), and WebSocket protocols, more convenient for tiny IoT devices. Finally, we discuss future research directions of communication protocols for IoT.

关键词： Internet of Things IoT application layer protocols IoT communicati on pr otocols Performance evaluation