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Workload-aware request routing in cloud data center using software-defined networking

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Journal of Systems Engineering and Electronics 2015年第1期26卷 151-160页

作者： Haitao Yuan Jing Bi bohu li School of Automation Science and Electrical Engineering Beihang University Department of Automation Tsinghua University

Large latency of applications will bring revenue loss to cloud infrastructure providers in the cloud data center. The existing controllers of software-defined networking architecture can fetch and process traffic information in the network. Therefore, the controllers can only optimize the network latency of applications. However, the serving latency of applications is also an important factor in delivered user-experience for arrival requests. Unintelligent request routing will cause large serving latency if arrival requests are allocated to overloaded virtual machines. To deal with the request routing problem, this paper proposes the workload-aware software-defined networking controller architecture. Then, request routing algorithms are proposed to minimize the total round trip time for every type of request by considering the congestion in the network and the workload in virtual machines（VMs）. This paper finally provides the evaluation of the proposed algorithms in a simulated prototype. The simulation results show that the proposed methodology is efficient compared with the existing approaches.

关键词： cloud data center(CDC) software-defined networking request routing resource allocation network latency optimization

Exponential stability of discrete-time positive switched T-S fuzzy systems with all unstable subsystems

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Science China(Information Sciences) 2021年第5期64卷 236-238页

作者： Gengjiao YANG Fei HAO lin ZHANG bohu li School of Automation Science and Electrical Engineering Beihang University Engineering Research Center of Complex Product Advanced Manufacturing Systems Ministry of Education Beijing Simulation Center

Dear editor,Over the past few decades, stability analysis has been an important field of research, and various methods for stability analysis have been proposed [1]. In recent years, stability problem of positive swit... 详细信息

关键词： stability analysis positive switched nonlinear systems T-S model unstable subsystems fast MDADT

Control of Stray Currents in Pipeline System based on Melnikov Theory

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Control of Stray Currents in Pipeline System based on Melnik...

Introduction to Cloud Manufacturing

第36届中国控制会议

作者： Peng Wang bohu li Guoqiang Shi Junhua Zhou School of Automation Science and Electrical Engineering BeiHang University Beijing Complex Product Advanced Manufacturing Engineering Research Center Beijing Simulation Center State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Science and Technology on Space System Simulation Laboratory Beijing Simulation Center

ISBN: (纸本)9781538629185

The pipeline network interfered by the stray currents has been verified to be a complex nonlinear dynamical *** paper shows that the chaotic characteristic could be utilized in the stray currents *** prove this,this paper establishes an equivalent chaotic control *** we analyze this model by using Melnikov method and find out the condition under which the chaotic phenomenon will be *** order to get a sufficient proof for identifying the conclusion,simulation experiments are used to verify the validity of the control method.

关键词： stray currents chaos control Melnikov

来源： cnki会议评论

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ZTE Communications 2010年第4期8卷 6-9页

作者： li bohu Zhang lin Chai Xudong Engineering Research Center of Complex Product Advanced Manufacturing Systems Ministry of Education Beihang University Beijing 100191 P. R. China Beijing Simulation Center Beijing 100854 P. R. China

Cloud manufacturing is a new, networked and intelligent manufacturing model that is service-oriented. know edge based, high performance, and energy efficient. In this model, state-of-the-art technologies such as informatized manufacturing, cloud computing, intemet of Things, semantic Web, aria high-performance computing are integrated in oroer to provide secure, reliabte. and high quality on-demand services at low prices for those involved in the whole manufacturing lifecycie. As an important part of cioud manufacturing, cloud simulation technology based on the COSIM-CSP platform has primarily been aoplied in thedesign of a multidisciplinary virtual prototype of a flight vehicle. This lays the foundation for further research into cloud manufacturina.

关键词： informatized manufacturing cloud manufacturing cloud computing networked manufacturing

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面向语义的C4ISR/Sim集成系统设计

北京航空航天大学学报 2006年第10期32卷 1226-1230页

作者：谭娟李伯虎北京航空航天大学自动化科学与电气工程学院北京100083

采用面向服务的体系结构(SOA,Service-Oriented Archilecture)的C4 ISR/Sim集成系统可以借助其体系结构的优势,达到信息获取方式和信息表示语法上的一致.提出的面向语义的C4 ISR/Sim集成系统通过扩展SOA,采用系统的层次化的语义体系不... 详细信息

采用面向服务的体系结构(SOA,Service-Oriented Archilecture)的C4 ISR/Sim集成系统可以借助其体系结构的优势,达到信息获取方式和信息表示语法上的一致.提出的面向语义的C4 ISR/Sim集成系统通过扩展SOA,采用系统的层次化的语义体系不仅改善了系统构建的灵活性、可重用性和可扩展性等问题,而且实现了集成系统的语义互通.该体系结构以核心服务层的领域本体模型为基础,扩展定制服务层的模型服务语义描述,通过语义服务匹配,实现应用层的需求描述到系统组成之间的自动映射.原型系统的实现证明了设计方法的正确性和可行性.

关键词：语义本体 Web本体语言 C4ISR/Sim

Some　Techniques　for　Solving　Ordinary　Differential　Equations　with　Discontinuities　in　Real－time　Simulation

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Journal of Systems Engineering and Electronics 1996年第3期7卷 69-80页

作者： Xie Yajun liu Degui & li bohu(Beijing Institute of Computer Application and Simulation Technology,P.O.Box 3929,Beijing 100854,P.R.China) Beijing Institute of Computer Application and Simulation Technology P.O. Box 3929 Beijing 100854 P.R. China

This paper discusses some techniques for treating discontinuities of the right-hand functions of ordinary differential equations (ODEs) in real-time digital simulation (RTDS). The numericalexperiments show that these ... 详细信息

关键词： Real-time digital simulation Discontinuity Polishing function.

发展高质量智能制造奋力推进新型工业化迈进中国式工业现代化的新征程

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新型工业化理论与实践 2024年第2期1卷 11-26页

作者：李伯虎李潭柴旭东侯宝存林廷宇宿春慧谷牧刘阳郭谨周宇琪朱静瑜陈南江中国航天科工集团有限公司北京100143 北京航空航天大学北京100191 南昌大学江西南昌330031 美的集团广东佛山528311

我国正迈进全面建设社会主义现代化国家的新征程,其中工业化是国家现代化的关键。当前,我国正处于工业化新阶段,面临新机遇新挑战。党的二十大提出,我国要在2035年基本实现新型工业化,加快建设制造强国。那么,新型工业化的内涵是什么?... 详细信息

我国正迈进全面建设社会主义现代化国家的新征程,其中工业化是国家现代化的关键。当前,我国正处于工业化新阶段,面临新机遇新挑战。党的二十大提出,我国要在2035年基本实现新型工业化,加快建设制造强国。那么,新型工业化的内涵是什么?如何推进?本研究认为,新型工业化的核心是发展高质量智能制造。所谓高质量智能制造,是在新发展理念指引下,深度融合运用新一代信息技术、智能科学技术、制造科学技术与制造应用领域专业技术,使制造业实现数字化、网络化/云化、智能化,建立起连接人、虚拟世界和实体世界的新模式、新技术、新业态。高质量智能制造能推动产业升级,提高核心竞争力。要实现这一目标,我国既有市场优势、技术优势,又有政策优势,并已取得显著成效。然而,目前也存在短板,更需加快培育新型人才,建设创新体系,突破核心技术,完善政策环境,积极开放合作。本研究系统阐释了新型工业化和高质量智能制造的内涵,给出了高质量智能制造的体系结构、技术范畴和当前作者团队的初步实践探索,提出奋力推进新型工业化的着力方向及着眼点在于发展高质量智能制造,这将是迈进中国式工业现代化新征程的关键。

关键词：新型工业化高质量智能制造技术创新制造强国产业升级

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一种优化的DDM实现策略

系统仿真学报 1999年第4期11卷 231-233页

作者：柴旭东李伯虎北京航空航天大学自动控制系中国航天工业总公司第二研究院

介绍了ＨＬＡ／ＲＴＩ中数据分布管理ＤＤＭ（ＤａｔａＤｉｓｔｒｉｂｕｔｉｏｎＭａｎａｇｅｍｅｎｔ）的基本功能及其实现框架，研究并比较了当前ＤＤＭ实现中的几种不同方法，并提出一种优化的ＤＤＭ实现策略——基于网格－源对象的... 详细信息

介绍了ＨＬＡ／ＲＴＩ中数据分布管理ＤＤＭ（ＤａｔａＤｉｓｔｒｉｂｕｔｉｏｎＭａｎａｇｅｍｅｎｔ）的基本功能及其实现框架，研究并比较了当前ＤＤＭ实现中的几种不同方法，并提出一种优化的ＤＤＭ实现策略——基于网格－源对象的过滤方法，以解决现有的ＤＤＭ实现方法中所存在的不足。

关键词： DDM 分布交互仿真优化仿真系统

Prolog to the Special Issue on System Simulation

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Journal of Systems Engineering and Electronics 1993年第4期4卷 1-1页

作者： li, bohu

System simulation is a comprehensive technology, which makesdynamic experiments on a system by means of system model(computerized / semi-physical / physical mode) under certainexperimental condition. Today, system sim... 详细信息

关键词： Simulation Prolog to the Special Issue on System Simulation