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检索条件"主题词=Algorithm Design And Analysis"

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Root Cause analysis of Anomalies of Multitier Services in Public Clouds 25

Root Cause Analysis of Anomalies of Multitier Services in Pu...

引用

25th IEEE/ACM International Symposium on Quality of Service (IWQoS)

作者： Weng, Jianping Wang, Jessie Hui Yang, Jiahai Yang, Yang Tsinghua Univ Inst Network Sci & Cyberspace Tsinghua Natl Lab Informat Sci & Technol Beijing Peoples R China

ISBN: (纸本)9781538627044

Anomalies of multitier services running in cloud platform can be caused by components of the same tenant or performance interference from other tenants. If the performance of a multitier service degrades, we need to find out the root causes precisely to recover the service as soon as possible. In this paper, we argue that cloud providers are in a better position than tenants to solve this problem, and the solution should be non-intrusive to tenants' services or applications. Based on these two considerations, we propose a solution for cloud providers to help tenants to localize root causes of any anomaly. We design a non-intrusive method to capture the dependency relationships of components, which improves the feasibility of root cause localization system. Our solution can find out root causes no matter they are in the same tenant as the anomaly or from other tenants. Our proposed two-step localization algorithm exploits measurement data of both application layer and underlay infrastructure and a random walk procedure to improve its accuracy. Our real-world experiments of a three-tier web application running in a small-scale cloud platform show a 38.9% improvement in mean average precision compared to current methods.

关键词： Cloud computing Interference Time factors Resource management Measurement algorithm design and analysis Virtual machining

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Constructing a Self-stabilizing CDS with Bounded Diameter in Wireless Networks under SINR

Constructing a Self-stabilizing CDS with Bounded Diameter in...

引用

IEEE Conference on Computer Communications (INFOCOM)

作者： Yu, Jiguo Ning, Xueli Sun, Yunchuan Wang, Shengling Wang, Yawei Qufu Normal Univ Sch Informat Sci & Engn Rizhao Shandong Peoples R China Beijing Normal Univ Sch Informat Sci & Technol Beijing Peoples R China George Washington Univ Dept Comp Sci Washington DC USA

ISBN: (纸本)9781509053360

As a virtual backbone structure, connected dominating sets (CDSs) play an important role in topology control for wireless networks. In this paper, we develop a distributed self-stabilizing CDS construction algorithm under the SINR model (also known as the physical interference model), a more practical yet more challenging interference model for distributed algorithm design. Specifically, we propose a randomized distributed algorithm that can construct a CDS in O(log n) timeslots with a high probability, where n is the total number of nodes in the network. The constructed CDS achieves constant approximation in both density and diameter. To the best of our knowledge, this is the first known asymptotically optimal self-stabilizing result in terms of both density and diameter for distributed CDS construction under the practical SINR model.

关键词： Interference Signal to noise ratio algorithm design and analysis Approximation algorithms Wireless networks Wireless sensor networks

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An Efficient Hardware Implementation of Vector-based Odd-Even Merge Sorting 8

An Efficient Hardware Implementation of Vector-based Odd-Eve...

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8th IEEE Annual Ubiquitous Computing, Electronics and Mobile Communication Conference (UEMCON)

作者： Korat, Uday A. Yadav, Pratik Shah, Harshil Intel Folsom CA 95630 USA Ingenu San Diego CA USA San Diego State Univ San Diego CA 92182 USA

ISBN: (纸本)9781538611043

Sorting is one of the basic computational operation that has an immense impact on the performance of the system. Since the past few decades, sorting algorithms have been studied extensively in the field of hardware engineering and real-time operating systems. The efficiency of an application depends on the usage of a sorting algorithm. In this article, we have compared various sorting algorithms on basis of time complexity. We propose a vector-based parallel odd-even merge sort, which has worst-case time complexity less than that of O(n). This sorting algorithm is first designed and simulated in Matlab. We then implement bit-true, cycle-accurate and high-throughput architecture for the same algorithm on Xilinx Virtex-7 VC707 field programmable gate array (FPGA) emulation kit.

关键词： Sorting Hardware Field programmable gate arrays Time complexity algorithm design and analysis Computer architecture

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A two-stage RRT path planner for automated parking 13

A two-stage RRT path planner for automated parking

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13th IEEE Conference on Automation Science and Engineering (IEEE CASE)

作者： Wang, Yebin Jha, Devesh K. Akemi, Yukiyasu Mitsubishi Elect Res Labs Cambridge MA 02139 USA Mitsubishi Electr Corp Adv Technol R&D Ctr 8-1-1 Tsukaguchi Honmachi Amagasaki Hyogo 6618661 Japan

ISBN: (纸本)9781509067817

Path planning for automated parking remains challenged by the demand to balance general parking scenarios and computational efficiency. This paper proposes a two-stage rapid-exploring random tree (RRT) algorithm to improve the computational efficiency. At first the proposed algorithm performs space exploration and establishes prior knowledge, represented as waypoints, using cheap computation. Secondly a waypoint-guided RRT algorithm, with a sampling scheme biased by the waypoints, constructs a kinematic tree connecting the initial and goal configurations. Numerical study demonstrates that the two-stage algorithm achieves at least 2X faster than the baseline one-stage algorithm.

关键词： Path planning Kinematics Space exploration algorithm design and analysis Wheels Heuristic algorithms Automobiles

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Application Improved particle swarm algorithm in parameter optimization of Hydraulic turbine Governing systems 3

Application Improved particle swarm algorithm in parameter o...

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2017 IEEE 第3届信息技术与机电一体化工程国际学术会议(ITOEC 2017)

作者： Guo Lei Jiangxi Province Key Laboratory of precision drive & control Nanchang Institute of Technology

The dynamic characteristics of a hydraulic turbine governing system is determined by the parameters of the hydraulic turbine *** are several drawbacks of the conventional particle swarm alg

ISBN: (纸本)9781509053643;9781509053636

The dynamic characteristics of a hydraulic turbine governing system is determined by the parameters of the hydraulic turbine *** are several drawbacks of the conventional particle swarm alg

关键词： Optimization Particle swarm optimization Hydraulic turbines Convergence algorithm design and analysis Linear programming Mathematical model

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Dynamic Mobile Edge Caching with Location Differentiation

Dynamic Mobile Edge Caching with Location Differentiation

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IEEE Global Telecommunications Conference (GLOBECOM)

作者： Yang, Peng Zhang, Ning Zhang, Shan Yu, Li Zhang, Junshan Shen, Xuemin (Sherman) Huazhong Univ Sci & Technol Sch Elect Informat & Commun Wuhan Hubei Peoples R China Univ Waterloo Dept Elect & Comp Engn Waterloo ON Canada Arizona State Univ Sch Elect Comp & Energy Engn Tempe AZ USA

ISBN: (纸本)9781509050192

Mobile edge caching enables content delivery directly within the radio access network, which effectively alleviates the backhaul burden and reduces round-trip latency. To fully exploit the edge resources, the most popular contents should be identified and cached. Observing that content popularity varies greatly at different locations, to maximize local hit rate, this paper proposes an online learning algorithm that dynamically predicts content hit rate, and makes location-differentiated caching decisions. Specifically, a linear model is used to estimate the future hit rate. Considering the variations in user demand, a perturbation is added to the estimation to account for uncertainty. The proposed learning algorithm requires no training phase, and hence is adaptive to the time-varying content popularity profile. Theoretical analysis indicates that the proposed algorithm asymptotically approaches the optimal policy in the long term. Extensive simulations based on real world traces show that, the proposed algorithm achieves higher hit rate and better adaptiveness to content popularity fluctuation, compared with other schemes.

关键词： Estimation Mobile communication Heuristic algorithms Prediction algorithms Videos Mobile computing algorithm design and analysis

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design of an Artificial Magnetic Conductor Surface Using an Evolutionary algorithm 19

Design of an Artificial Magnetic Conductor Surface Using an ...

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19th International Conference on Electromagnetics in Advanced Applications (ICEAA)

作者： Lalbakhsh, Ali Afzal, Mahammud U. Esselle, Karu P. Smith, Stephanie Macquarie Univ Dept Engn Sydney NSW 2109 Australia CSIRO Astron & Space Sci POB 76 Epping NSW 1710 Australia

Application of an evolutionary algorithm in designing an artificial electromagnetic conductor (AMC) at 12 GHz is explained in this paper. To do so, a binary version of particle swarm optimization algorithm in connecti... 详细信息

ISBN: (纸本)9781509044511

关键词： Antennas Particle swarm optimization algorithm design and analysis Reflection Electromagnetics Australia Conductors

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A Coordinated Synchronous and Asynchronous Parallel Routing Approach for FPGAs 17

A Coordinated Synchronous and Asynchronous Parallel Routing ...

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IEEE/ACM 36th International Conference on Computer-Aided design (ICCAD)

作者： Shen, Minghua Luo, Guojie Xiao, Nong Sun Yat Sen Univ Sch Data & Comp Sci Guangzhou Guangdong Peoples R China Peking Univ Sch EECS Ctr Energy Efficient Comp & Applicat Beijing Peoples R China NUDT Collaborat Innovat Ctr High Performance Comp Changsha Hunan Peoples R China

ISBN: (纸本)9781538630938

Routing is a time-consuming process in the FPGA design flow. Parallelization is a promising direction to accelerate the routing. While synchronous parallelization can converge a feasible solution, the ideal speedup is rarely achieved due to excessive communication overheads. Asynchronous parallelization can provide an almost linear speedup, but it is difficult to converge in the limited number of iterations due to net dependency. In this paper we propose SAPRoute, which coordinates synchronous and asynchronous parallelism on distributed multiprocessing environment to accelerate the routing for FPGAs. The objective is to boost the more speedup of parallel routing algorithm under the requirement of convergence. To the best of our knowledge, this is the first work to study the impact of synchronization and asynchronization during parallelization. Experimental results show that our approach have negligible explicit synchronization overhead and achieves significant speedup improvement over a set of commonly used benchmarks. Notably, SAPRoute produces the speedup of 24.27x on average compared to the default serial solution.

关键词： Routing Field programmable gate arrays Synchronization Parallel processing Acceleration Convergence algorithm design and analysis

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Statistical-mechanical analysis of the FXLMS algorithm for multiple-channel active noise control 9

Statistical-mechanical analysis of the FXLMS algorithm for m...

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9th Annual Summit and Conference of the Asia-Pacific-Signal-and-Information-Processing-Association (APSIPA ASC)

作者： Murata, Tomoki Kajikawa, Yoshinobu Miyoshi, Seiji Kansai Univ Grad Sch Sci & Engn Suita Osaka Japan Kansai Univ Fac Engn Sci Suita Osaka Japan

ISBN: (纸本)9781538615423

We analyze the behaviors of the Filtered-X LMS (FXLMS) algorithm for active noise control (ANC). Correlations between the impulse response of an adaptive filter and a primary path are treated as macroscopic variables. To obtain the correlations, we analytically solve the equations and finally compute the MSE. In particular, we analyze the behaviors of multiple-channel ANC. We theoretically show that the MSE is affected by the secondary paths that are not directly connected.

关键词： Microphones Signal processing algorithms Differential equations Correlation Finite impulse response filters algorithm design and analysis Heuristic algorithms

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Efficient Social Network analysis in Big Data Architectures 40

Efficient Social Network Analysis in Big Data Architectures

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40th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)

作者： Soric, Iva Dinjar, Davor Stajcer, Marko Orescanin, Drazen Poslovna Inteligencija Doo Zagreb Croatia

ISBN: (纸本)9789532330922

Social network analysis (SNA) is the application of graph theory to understand, categorize and quantify relationships in a social network. It can be a great tool to improve analytic capabilities in any field, for example marketing analytics, churn prediction, health care, etc. In terms of SNA, network structure is defined by nodes, edges and metrics which quantify the importance or influence of certain nodes in the network or relationship strength between nodes. algorithms for network metrics calculation are complex and that makes SNA difficult to implement in big data environments on large datasets with many nodes and edges. In this paper we will elaborate how to efficiently and performance wise perform SNA and visualize results of the analysis on large datasets using increasingly popular GraphX and JavaScript libraries.

关键词： Sparks Tools Libraries Social network services Big Data algorithm design and analysis Data visualization

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