检索结果-内蒙古大学图书馆

Set of model reduction rules and algorithms for web services composition under orchestration pattern

Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University 2009年第6期43卷 20-23+47页

作者： Yang, Huaizhou Li, Zengzhi Institute of Computer Architecture and Networks Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

The performance calculation of Web services composition process in large state space is time-consuming, and is difficult to fulfill the real-time performance analysis. Therefore, a process reduction algorithm is presented to accelerate the calculation of system performance. The Web services composition process is modeled using the generalized stochastic Petri net. Through auto-detecting the reductive subnet, some regular structures, such as sequence, choice, concurrent and loop structures, can be eliminated under the precondition of preserving the timing constraints. The sub processes which can be calculated independently are separated. A large scale model can thus be reduced within a certain period. Experimental results with multiform models indicate that the system response time and throughput are obtained rapidly by using the algorithm in the dynamic and adaptive composition process. The algorithm can be applied to online performance analysis of most Web services composition process.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

Distributed Processing from Large Scale Sensor Network Using Hadoop

Distributed Processing from Large Scale Sensor Network Using...

引用

IEEE International Conference on Services Economics (SE)

作者： Rosangela de Fatima Pereira Marcelo Risse de Andrade Artur Carvalho Zucchi Karen Langona Walter Akio Goya Nelson Mimura Gonzalez Tereza Cristina Melo Brito de Carvalho Jan-Erik Mangs Azimeh Sefidcon Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Laboratory of Computer Networks and Architecture Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Laboratory of Computer Networks and Architecture University of São Paulo Brazil Ericsson Research Sweden

Big data refers to large amounts of data, normally in unstructured forms, such as text, sensor data, audio, video, log files, and more. When collecting from a large number of nodes, sensor networks can produce large data sets. Climate and sensor network data are applied to assist the decision making process in agricultural production. In this paper we present the main aspects of a prototype to test Hadoop framework applied to process climate related data sets in a cloud computing infrastructure.

关键词： Meteorology Cloud computing Distributed databases computer architecture Decision making Portals Distributed processing

来源：评论

学校读者我要写书评

暂无评论

Latency-aware Partial Task Offloading in Collaborative Edge Computing 26

Latency-aware Partial Task Offloading in Collaborative Edge ...

引用

26th International Conference on computer Supported Cooperative Work in Design, CSCWD 2023

作者： Gao, Yingmeng Zhu, Jie Huang, Haiping Chen, Chen Nanjing University of Posts & Telecommunications Nanjing210003 China Academy of Sciences State Key Laboratory Chinese of Computer Architecture Institute of Computing Technology Beijing100864 China Jiangsu High Technology Reasearch Key Laboratory of Wireless Sensor Networks Nanjing210023 China Nanjing University of Aeronautics and Astronautics Nanjing210016 China

ISBN: (纸本)9798350331684

When it comes to the fifth generation, collaborative edge computing is preferred for offloading computation-intensive tasks of low-latency applications in Internet of Things. In this paper, we consider the partial task offloading problem where tasks can be divided into subtasks and offloaded to nearby devices. The flow scheduling problem is integrated in the offloading process, i.e., multiple and conflicting route paths are considered. We propose the latency-aware partial task offloading framework (LaPTOF) for the considered problem. LaPTOF integrates a weighted priority ranking strategy (WPRS) which generates multiple solutions with different weights on task arrival time and the task processing time. A feasible solution generation method (FSGM) is designed where the best offloaded proportion of tasks are computed, and the appropriate offloaded devices and offload paths are determined. The proposed LaPTOF has an advantage in providing a scheduling plan that minimizes total completion time of task offloading in a shorter duration. The experimental results show that the proposal is suitable for the considered problem compared with JPOFH and its variants on both effectiveness and efficiency. © 2023 IEEE.

关键词： Internet of things

来源：评论

学校读者我要写书评

暂无评论

Server of quality system for video on demand over ATM

Server of quality system for video on demand over ATM

引用

IEEE International Conference on ATM

作者： R.M. Silveira W.V. Ruggiero LARC-Laboratory of Computer Architecture and Networks PCS-Department of Computer and Digital System Engineering EPUSP Polytechnic School University of Sao Paulo Sao Paulo Brazil

ISBN: (纸本)0780370937

Considering video transmission over an ATM network for a video on demand system, we propose a server of quality (SoQ) that has the main function of fitting the video transmission rate to the available network bandwidth. The SoQ uses a "backpropagation" neural network to fit the MPEG quantization coefficients in a nonlinear way. Here are shown the SoQ specification and the results obtained from its main module implementation.

关键词： Video on demand Asynchronous transfer mode Bit rate Network servers Bandwidth Neural networks Quality of service Quantization Telecommunication traffic Backpropagation

来源：评论

学校读者我要写书评

暂无评论

Exploiting Hadoop Topology in Virtualized Environments

Exploiting Hadoop Topology in Virtualized Environments

引用

IEEE World Congress on Services (SERVICES)

作者： Rosangela de Fatima Pereira Walter Akio Goya Karen Langona Nelson Mimura Gonzalez Tereza Cristina Melo de Brito Carvalho Jan-Erik Mangs Azimeh Sefidcon Laboratory of Computer Networks and Architecture Escola Politecnica University of sao Paulo sao Paulo Brazil Ericsson Research Sweden Stockholm Sweden

Virtualization is a key technique to make an environment easier to manage in terms of resource allocation. MapReduce is a programming model that provides an abstraction to perform distributed computation for large datasets. Hadoop is a well-known framework that offers an open source implementation for this model. Combining Hadoop and virtualization techniques in cloud-computing environments can unveil great potential, especially for big data context. However, running MapReduce jobs on virtual machines has indicated performance issues not solved yet. In this paper we present and discuss three scenarios regarding Hadoop topology in a cloud infrastructure. The first scenario proposes to allocate Hadoop daemons in a fully virtualized environment, the second scenario presents a hybrid environment, and the third scenario suggests to virtualize only MapReduce *** also report results from a series of tests allocating Hadoop daemons in a fully virtualized environment. Results show that adding virtual machines to the cluster causes an overhead, decreases the efficiency of CPU utilization, and shortens the time slots for the MapReduce jobs.

关键词： Virtual machining Cloud computing Virtualization Hardware Resource management Virtual machine monitors

来源：评论

学校读者我要写书评

暂无评论

Application of machine learning to manufacturing: results from metal etch

Application of machine learning to manufacturing: results fr...

引用

IEEE/CHMT(CPMT) International Electronics Manufacturing Technology Symposium

作者： A. Chatterjee D. Croley V. Ramamurti Kui-Yu Chang Advanced Computer Architecture Laboratory Motorola Inc. Austin TX USA Laboratory for Artificial Neural Networks University of Texas Austin Austin TX USA

With the increasing availability of huge quantities of manufacturing data, and the pressures of continuous process improvement and scrap reduction, engineers are beginning to use machine learning techniques along with traditional statistical methods. In this paper, we discuss the application of standard machine learning techniques to analyze, classify, and predict the quality of metal etch using RIE. Three types of data were used to characterize a metal etch: in-process sensor data from the etch chamber, metrology data for critical dimension measurements before and after etch, and metal resistance measurements from probe tests. Three machine learning paradigms were applied: neural networks, induction learning, and case-based reasoning. This paper describes the techniques used, the results obtained, and the conclusions drawn.

关键词： Machine learning Etching Electrical resistance measurement Manufacturing processes Data engineering Statistical analysis Sensor phenomena and characterization Metrology Probes Testing

来源：评论

学校读者我要写书评

暂无评论

PCE QoS tools and related scalability in WDM networks

PCE QoS tools and related scalability in WDM networks

引用

International Conference on Transparent Optical networks

作者： Joana Sócrates Dantas Davide Careglio Regina Melo Silveira Wilson Vicente Ruggiero Josep Solé-Pareta University of São Paulo LARC - Computer Networks and Architecture Laboratory Brazil Technical University of Catalonia (UPC) Barcelona Catalonia Spain

The virtual circuit characteristic of MPLS and GMPLS architectures has enabled the implement of Traffic Engineering (TE) and Differentiated Services (Diff-Serv) profile to networks. Both schemes are possible by the application of preemption policies and priority of path assignment. With the advent of Path Computation Element (PCE) the routing task can be centralized and properly (re-)designed to accommodate MPLS' and GMPLS' Diff-Serv and TE characteristics. However, as a centralized system, the complex characteristics of heterogeneous networks and the extra data involved on TE and Diff-Serv constrains and requirements for path computations may overload the PCEs' processing capacity and radically increase the number of PCEP control messages exchanged, jeopardizing the scalability of the system in general. In this article we present an analysis on the current standardized PCE tools in a WDM network in terms of the number of control messages exchanged impact on the system and its optimization performance.

关键词： computer architecture Multiprotocol label switching Scalability Routing Bandwidth Quality of service Topology

来源：评论

学校读者我要写书评

暂无评论

A Framework for Authentication and Authorization Credentials in Cloud Computing

A Framework for Authentication and Authorization Credentials...

引用

IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Nelson Mimura Gonzalez Marco Antônio Torrez Rojas Marcos Vinícius Maciel da Silva Fernando Redígolo Tereza Cristina Melo de Brito Carvalho Charles Christian Miers Mats Näslund Abu Shohel Ahmed Laboratory of Computer Networks and Architecture University of São Paulo Brazil State University of Santa Catarina Joinville Brazil Ericsson Research

Security is a key concern when adopting cloud technology. Cloud solutions include not only issues inherited from related technologies, such as virtualization and distributed computing, but also new concerns associated to complexity of the cloud ecosystem, composed by the cloud entities and their interactions. One of the concerns is related to authentication and authorization in the cloud in order to provide robust mechanisms to identify entities and establish their permissions and roles in the cloud, controlling resource usage and promoting accounting and isolation. This paper identifies the state of the art in terms of credential management focusing on the cloud ecosystem. It proposes a credential classification and a framework for studying and developing solutions in this context, unifying concepts related to cloud deployment models, service types, entities and lifecycle controls.

关键词： Cloud computing Authorization Authentication Biological system modeling Ecosystems Organizations

来源：评论

学校读者我要写书评

暂无评论

Security Analysis of Projected C*- Scheme

Security Analysis of Projected C*- Scheme

引用

International Conference on Multimedia Information Networking and Security (MINES)

作者： Feng Yuan Yupu Hu Yan Wang Key Laboratory of Computer Networks and Information Security Xidian University Xi'an China School of Science Xi'an University of Architecture and Technology Xi'an China

This paper investigates the security of the projected C* - cryptographic scheme, and presents a method to attack the scheme. The basic idea of the attack is to utilize the affine part of the private keys and the weakness caused by the structure of the private key to find a number of linear equations. The attack can recover the private keys efficiently when the parameters are q ≤ 2 3 , n≤10 and s=1.

关键词： Mathematical model Polynomials Public key cryptography Symmetric matrices

来源：评论

学校读者我要写书评

暂无评论

On the nonlinearity of some T-functions

引用

Journal of Information and Computational Science 2011年第11期8卷 2231-2237页

作者： Wang, Yan Hu, Yupu Li, Shunbo Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China Department of Mathematics Xi'an University of Architecture and Technology Xi'an 710055 China

Single cycle T-functions are newly proposed components in stream cipher. In order to verify if such function is suitable for cipher design, the cryptographic properties of single cycle T-function are discussed. Nonlinearity of the kth coordinate function of single cycle T-functions are studied according to the properties of single cycle T-function and the Walsh transform. Lower bounds and upper bounds are given at different situations. The results show that a single cycle T-function itself have 0 nonlinearity, but the most significant coordinate function can get high nonlinearity. © 2011 Binary Information Press.

关键词： Walsh transforms

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：