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检索条件"任意字段=10th International Conference on Parallel and Distributed Computing, Applications and Technologies"

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IEEE international conference on Fuzzy Systems (FUZZ-IEEE)

作者： V. Loia P. Luongo S. Senatore M.I. Sessa Dipartimento Matematica e Informatica Universita E28099di Salemo Baronissi Italy

Although advanced and innovative technologies have been used to retrieve information, the need of advanced, new techniques for Web information retrieval is extant. One of the main difficulties is to return accurate information that fully describes the human request. Standard Web search engines provide two mechanisms to handle a user's query: to input the search keywords or to restrict the searching within a certain topic. these approaches appear too weak to cope with such a vast amount of information and with such a rich human expressiveness. Our approach to Web information retrieval consists in merging different available technologies and paradigms: mobile computation is exploited as effective approach to obtain updated results by dispatching the agents directly on Web resources. Agents are equipped with deductive behavior so to be autonomous in applying inference-based reasoning. A similarity model is embedded into the reasoning engine in order to correctly process the approximation level established at user level side.

关键词： Information retrieval Mobile agents Humans Search engines Mobile computing Web search Internet distributed computing Databases Merging

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Transaction Finality through Ledger Checkpoints

Transaction Finality through Ledger Checkpoints

引用

international conference on parallel and distributed Systems (ICPADS)

作者： Ratul Antik Das Md. Muhaimin Shah Pahalovi Muhammad Nur Yanhaona Research and Development Kona Software Lab Dhaka Bangladesh

ISBN: (纸本)9781728125848

the reversal of transactions due to blockchain ledger reorganization has become a major hindrance for public blockchain technologies' adoption in real-world business and financial applications. Since a typical real-world product, service, or agreement cannot be reversed; associated transactions in the blockchain ledger must also be final. this paper describes and analyzes the transaction finality solution for our proof of work (PoW) mining based blockchain network, the Kona Blockchain Platform. the solution works even if 49% of the network's total mining power is compromised due to malicious attacks. Although designed for our specific platform, the ideas from the solution can be easily adapted to achieve transaction finality in existing public blockchain networks. this paper also discusses how this can be done. To the best of our knowledge, ours is the first solution for deterministic transaction finality for blockchain networks incentivized exclusively by PoW mining.

关键词： Computer networks Peer-to-peer computing distributed information systems Fault tolerance Protocols distributed information systems Peer to peer computing computer network Fault tolerance protocols Checkpoints mining Solutions self-reversal

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Towards Traceability across Sovereign, distributed RFID Databases

Towards Traceability across Sovereign, Distributed RFID Data...

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international Symposium on Database Engineering and applications (IDEAS)

作者： Rakesh Agrawal Alvin Cheung Karin Kailing Stefan Schonauer Microsoft Search Labs CA USA IBM Almaden Research Center San Jose CA USA

Tracking and tracing individual items is a new and emerging trend in many industries. Driven by maturing technologies such as radio-frequency identification (RFID) and upcoming standards such as the electronic product code (EPC), a rapidly increasing number of enterprises are collecting vast amounts of tracking data. To enable traceability over the entire life-cycle of items data has to be shared across independent and possibly competing enterprises. the need to simultaneously compete and cooperate requires a traceability system design that allows companies to share their traceability data while maintaining complete sovereignty over what is shared and with whom. Based on an extensive study of traceability applications, we introduce the formal concept of traceability networks and highlight the technical challenges involved in sharing data in such a network. To address these challenges, we present an innovative combination of query processing techniques from P2P networks and distributed as well as parallel databases with confidentiality enforcement techniques

关键词： Radiofrequency identification distributed databases Query processing Radio frequency Code standards Product codes Companies Target tracking Counterfeiting Consumer electronics

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Optimal Placement of Application-Level Checkpoints

Optimal Placement of Application-Level Checkpoints

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IEEE international conference on High Performance computing and Communications (HPCC)

作者： Panfeng Wang Zhiyuan Wang Yunfei Du Xuejun Yang Haifang Zhou National Laboratory for Parallel and Distributed Processing College of Computer National University of Defense Technology Changsha Hunan China

One of the basic problems related to the efficient application-level checkpointing is the placement of checkpoints in the source codes. In this paper we discuss two common questions with a source-to-source precompiler ALEC: 1) if there are N checkpoints in the application's source code, how to pick M checkpoints out of them minimizing the total amount of checkpoint data? 2) if there are no checkpoint in the application's source code, how to insert a set of checkpoints minimizing the amount of checkpoint data? We reveal that these two questions can both be abstracted as a mathematic model which is similar to the 0-1 integer programming model, and the model can be solved using implicit enumeration method. the solving methods proposed in the paper have been implemented and integrated into ALEC. Experimental results show that the method is efficient.

关键词： Checkpointing Fault tolerance Fault tolerant systems Program processors Computers Flow graphs Data structures

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A distributed multipath algorithm for providing bandwidth guaranteed routing

A distributed multipath algorithm for providing bandwidth gu...

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Asia-Pacific conference on Communications

作者： S. Zarifzadeh H. Mohammadi H. Khanmirza N. Yazdani Electronic and Computer Department University of Tehran Tehran Iran Electronic and Computer Department University of Tehran Tehran Tehran Iran

QoS routing is one of the key technologies to provide guaranteed service in IP networks. In most of the previous works on bandwidth constrained QoS routing, the source looks for one feasible path that satisfies a certain bandwidth requirement. In this scheme, the source blocks the request if it can not find one feasible path although there may be multiple paths such that a combination of these paths satisfies the bandwidth requirement. In this paper, we propose a distributed bandwidth routing that finds multiple paths for a request and divides the required bandwidth between them. Experimental results show that our algorithm has lower call blocking ratio than traditional single-path algorithms.

关键词： Bandwidth Delay Jitter IP networks Routing protocols distributed computing Algebra Sliding mode control

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A high-performance computational resource broker for grid computing environments

A high-performance computational resource broker for grid co...

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international conference on Advanced Information Networking and applications (AINA)

作者： Chao-Tung Yang Po-Chi Shih Kuan-Ching Li High-Performance Computing Laboratory Department of Computer Science and Tunghai University Taichung Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung Taiwan

ISBN: (纸本)0769522491

Internet computing and grid technologies promise to change the way we tackle complex problems. they will enable large-scale aggregation and sharing of computational, data and other resources across institutional boundaries. As grid computing is becoming a reality, there is a need for managing and monitoring the available resources worldwide, as well as the need for conveying these resources to the everyday user. this paper describes a resource broker with its main function as to match the available resources to the user's needs. the use of the resource broker provides a uniform interface to access any of the available and appropriate resources using user's credentials. the resource broker runs on top of the Globus toolkit. therefore, it provides security and current information about the available resources and serves as a link to the diverse systems available in the grid.

关键词： Grid computing Resource management Bandwidth distributed computing Network servers Monitoring Information security Middleware Access protocols Java

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Preventing Sybil Attack in Blockchain using distributed Behavior Monitoring of Miners

Preventing Sybil Attack in Blockchain using Distributed Beha...

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international conference on computing and Networking Technology (ICCNT)

作者： P Swathi Chirag Modi Dhiren Patel NIT Goa India VJTI Mumbai Maharashtra India

Blockchain technology is useful with the record keeping of digital transactions, IoT, supply chain management etc. However, we have observed that the traditional attacks are possible on blockchain due to lack of robust identity management. We found that Sybil attack can cause severe impact in public/permissionless blockchain, in which an attacker can subvert the blockchain by creating a large number of pseudonymous identities (i.e. Fake user accounts) and push legitimate entities in the minority. Such virtual nodes can act like genuine nodes to create disproportionately large influence on the network. this may lead to several other attacks like DoS, DDoS etc. In this paper, a Sybil attack is demonstrated on a blockchain test bed with its impact on the throughput of the system. We propose a solution directive, in which each node monitors the behavior of other nodes and checks for the nodes which are forwarding the blocks of only particular user. Such nodes are quickly identified, blacklisted and notified to other nodes, and thus the Sybil attack can be restricted. We analyze experimental results of the proposed solution.

关键词： Blockchain Peer-to-peer computing Monitoring throughput Bitcoin Image edge detection

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A discontinuous Galerkin method for mathematical simulating of gas-liquid mixture flows 10

A discontinuous Galerkin method for mathematical simulating ...

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10th international conference on High-Performance computing Systems and technologies in Scientific Research, Automation of Control and Production, HPCST 2020

作者： Shurina, E.P. Itkina, N.B. Markov, S.I. Trofimuk Institute of Petroleum Geology and Geophysics SB RAS 3 Koptug ave. Novosibirsk630090 Russia Novosibirsk State Technical University 20 Karla Marx ave. Novosibirsk630073 Russia Institute of Computational Technologies SB RAS 6 Academician M.A. Lavrentiev ave. Novosibirsk630090 Russia

We present mathematical simulating results of a gas-liquid mixture flow in a cylindrical pipe. the gas-liquid mixture consists of the mineralized water and propane gas. To analyze the mineral composition of the fluid, a sensor is mounted in the pipe. the sensor affects the topology of the flow velocity vector field. the gas-liquid mixture flow is described by the unsteady Navier-Stokes equations. When the flow rate of gas-liquid mixtures exceeds 20 m/s, eddy flows occur in the pipe with obstacles. A method of discretization should take into account the problem specifics: rapidly changing gradients, the prevalence of the convective term in the Navier-Stokes equations. A computational scheme of discontinuous Galerkin method has the local conservative property and is best suited for solving such singularly perturbed problems. To perform a spatial discretization, a computational scheme of the discontinuous Galerkin method in the function spaces H(div) and L 2 is used. Application of the multiscale approach allows breaking down the solution of the simulation problem into several smaller ones that can be solved using parallel computations. Mathematical modeling results of the gas-liquid mixture flow in the pipe with different options for the sensor location are presented. © Published under licence by IOP Publishing Ltd.

关键词： Navier Stokes equations

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Automated Pricing-based Provisioning of SDN/NFV Services in distributed Multi-access Edge computing using Cooperative Multi-Agent Deep Reinforcement Learning

Automated Pricing-based Provisioning of SDN/NFV Services in ...

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international conference on Dependable Systems and their applications (DSA)

作者： Jean Jimmy Julien Sirapop Nuannimnoi Ching-Yao Huang EECS International Graduate Program National Yang-Ming Chiao Tung University Hsinshu City Taiwan Electronics Engineering National Yang-Ming Chiao Tung University Hsinshu City Taiwan

the disruption caused by Software Defined Network and Network Function Virtualization (SDN/NFV) technologies will have many impacts on the telecom network. Specifically, the network architecture based on ETSI MANO comprising Virtual Infrastructure Manager (VIM), Virtual Network Function Manager (VNFM), and NFV Orchestrator (NFVO) will significantly change how we operate and manage the telecom network. these impacts on the network architecture will be made gradually. thus, the migration from non-virtualized networks to all virtualized networks will happen step by step. By introducing new actors into the telecom ecosystem, NFV-MANO will bring in new business models. It is envisaged that these new actors/models will promote competition hence the demand for more flexible charging models with real-time charging. In this research, we will address the architectural realization of the SDN/NFV charging model under the business model of MANO (MANagement and Orchestration) when the service provider (SP) uses the Network Function Virtualization Infrastructure (NFVI) from the NFVIaaS Provider in a distributed multi-access edge computing (MEC) environment. To optimize the Quality of Service (QoS) of MEC resource allocation for incoming services and maximize the overall operating profit of the service provider adopting our charging model, we also propose a new cooperative multi-agent actor-critic based deep reinforcement learning (MADRL) method trained with proximal policy optimization algorithm, namely Coop MAPPO. the results of our experiments showcase the superiority of the Coop-MAPPO multi-agent system over alternative decision-making approaches, with its potential for enhancing operational efficiency and profitability while minimizing failure rates.

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A Memory Access Pattern-Based Program Profiling System for Dynamic parallelism Prediction

A Memory Access Pattern-Based Program Profiling System for D...

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IEEE international conference on Trust, Security and Privacy in computing and Communications

作者： Zijun Han Guangzhi Qu Dona Burkard Kelvin Dobbins Comput. Sci. & Eng. Dept. Oakland Univ. Rochester MI USA Res. & Innovation Center Ford Motor Co. Dearbon MI USA

ISBN: (纸本)9781509032068

parallel computing is the simultaneous use of multiple computer resources to solve a computational problem. In order to automatically execute a sequential program so that inherent parallelism could utilize the underlying multi-core platforms, program profiling is necessary to learn the control and dataflow dependency which is critical for predicting the parallelization feasibility and finding parallelism solutions. In literature, algorithms and tools have been designed for either dynamic or static program analysis in order to increase the accuracy and performance in discovering all aspects of the target program. However, memory and runtime overhead remain two challenge problems for program profiling. In this work, based on the PIN framework, we have designed and implemented a memory access pattern-based program profiling system for sequential program parallelization prediction. Validation results on seven SPEC 2006 benchmark programs show the effectiveness of proposed system on both memory usage and cpu time for target program dynamic profiling.

关键词： parallel processing History Memory management Engines Runtime Pins Heuristic algorithms parallel PROCESSING (COMPUTERS) Runtime PIN Store management Heuristic algorithms Engines Bone Nails analysis programme sequential program Synclitism parallelism object programs Memory Memory CPU time

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