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检索条件"主题词=Consensus Algorithm"

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Distributed Formation Control of Autonomous Underwater Vehicles Based on Flocking and consensus algorithms 10th

Distributed Formation Control of Autonomous Underwater Vehic...

引用

10th International Conference on Intelligent Robotics and Applications (ICIRA

作者： Pan, Wuwei Jiang, Dapeng Pang, Yongjie Qi, Yuda Luo, Daichao Harbin Engn Univ Sci & Technol Underwater Vehicle Lab Harbin 150001 Peoples R China

ISBN: (纸本)9783319652894;9783319652887

In this paper, a distributed formation controller of autonomous underwater vehicles is presented. An artificial potential field is proposed based on the Lennard-Jones potential. A weight function is designed to make the potential smoothly die off at the boundaries. A control algorithm is proposed according to the three rules of Reynolds: flock centering, collision avoidance and velocity matching. A single-step target tracking method is proposed to translate the desired acceleration, produced by the potential force, to the desired velocity and heading for the AUV. To make the algorithm distributed, each AUV holds a copy of the virtual leader and calculates the guidance information individually. A consensus algorithm is proposed to make the mismatches convert to zeros. A fold line and a curve line path following of the fleet are simulated, with random initial positions of the AUVs. Under the formation control algorithms proposed, the AUVs are uniformly distributed and form a lattice-like formation. We increase the number of AUVs, and the algorithm serves well, which shows good availability and flexibility.

关键词： Autonomous underwater vehicle Distributed control Formation control Flocking algorithm consensus algorithm

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Distributed Ledger Technologies for M2M Communications 33

Distributed Ledger Technologies for M2M Communications

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33rd International Conference on Information Networking (ICOIN)

作者： Zivic, Natasa Ruland, Christoph Sassmannshausen, Jochen Carmeq GmbH Berlin Germany Univ Siegen Siegen Germany

ISBN: (纸本)9781538683507

Distributed Ledger Technologies (DLT) are seen as data bases of the future, which reduce the cost of trust and revolutionize transactions between individuals, companies and governments. They are considered as one of the main drivers of future applications, especially in field of Machine to Machine (M2) communications which are one of the basic technologies for Internet of Things (IoT). Therefore, Distributed Ledger Technologies with their inherent property to provide security, privacy and decentralized operation are engine for todays and future reliable, autonomous and trusted IoT platforms. For this reason, IoT using DLT can be considered as "Internet of Trusted Things". This paper considers tree basic DLT technologies according to their architecture: blockchain, tangle and hashgraph. Their characteristics are compared considering number of criteria, with the aim to find a proper architecture for a specific M2M application.

关键词： Distributed Ledger Technology Internet of Things Machine-to-Machine transactions Proof of Work Proof of Stake stability trust blockchain tangle hashgraph hash function digital signature directed acyclic graph consensus algorithm mining Winternitz signatures IOTA Bitcoin Byzantine error quantum computing

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Zero-determinant Strategy for the algorithm optimize of Blockchain PoW consensus 36

Zero-determinant Strategy for the Algorithm optimize of Bloc...

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第36届中国控制会议

作者： Yang Zhen Miao Yue Chen Zhong-yu Tang Chang-bing Chen Xin College of Mathematics Physics & Information EngineeringZhejiang Normal University

ISBN: (纸本)9781538629185

The Proof of Work(Po W) consensus algorithm guarantees the safety and dependability of Blockchain systems. Miners can achieve a consensus through the Po W algorithm during the mining process, that is mutual attacking. However, when the miners attack each other, all miners earn less. In this paper, we established a model that mining between two miners is an iterative game, and proposed a subclass of ZD strategy(a pining strategy) to alleviate miners’ dilemma, a miner can control another miner’s payoff and increase the social revenue through a pinning strategy. Numerical simulation results verify the effectiveness of the proposed strategy. In summary, this work leads to the better understanding and analysis of the Po W algorithm via the game theory, rendering it possible to design a more rational consensus algorithm in the future.

关键词： Blockchain consensus algorithm PoW Iterative game ZD strategy

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Atomic Appends in Asynchronous Byzantine Distributed Ledgers

Atomic Appends in Asynchronous Byzantine Distributed Ledgers

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European Dependable Computing Conference (EDCC)

作者： Vicent Cholvi Antonio Fernandez Anta Chryssis Georgiou Nicolas Nicolaou Michel Raynal Universitat Jaume I Spain IMDEA Networks Institute Madrid Spain University of Cyprus Cyprus Algolysis Ltd Cyprus IRISA France & PolyU Hong Kong

The following topics are dealt with: security of data; formal specification; safety-critical software; risk analysis; fault tolerant computing; genetic algorithms; finite state machines; automata theory; distributed p... 详细信息

ISBN: (数字)9781728189369

ISBN: (纸本)9781728189376

关键词： Servers Distributed ledger Fabrics Computer crashes Blockchain Distributed algorithms consensus algorithm

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Blockchain for Increased Cyber-Resiliency of Industrial Edge Environments

Blockchain for Increased Cyber-Resiliency of Industrial Edge...

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International Conference on Smart Computing (SMARTCOMP)

作者： Eugenio Balistri Francesco Casellato Carlo Giannelli Cesare Stefanelli University of Ferrara Ferrara Italy

ISBN: (数字)9781728169972

ISBN: (纸本)9781728169989

The advent of the Internet of Things (IoT) together with its spread in industrial environments have changed pro-duction lines, by dramatically fostering the dynamicity of data sharing and the openness of machines. However, the increased flexibility and openness of the industrial environment (also pushed by the adoption of Edge devices) must not negatively affect the security and safety of production lines and its opera-tional processes. In fact, opening industrial environments towards the Internet and increasing interactions among machines may represent a security threat, if not properly managed. The paper originally proposes the adoption of the Blockchain to securely store in distributed ledgers topology information and access rules, with the primary goal of maximizing the cyber-resiliency of industrial networks. In this manner, it is possible to store and query topology information and security access rules in a completely distributed manner, ensuring data availability even in case a centralized control point is temporarily down or the network partitioned. Moreover, Blockchain consensus algorithms can be used to foster a participative validation of topology information, to reciprocally ensure the identity of interacting machines/nodes, to securely distribute topology information and commands in a privacy-preserving manner, and to trace any past modification in a non-repudiable manner.

关键词： Network topology Distributed ledger Blockchain consensus algorithm Topology Peer-to-peer computing Security

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Reducing Redundant Control Messaging for Fast Response in SDN

Reducing Redundant Control Messaging for Fast Response in SD...

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IEEE/CIC International Conference on Communications in China (ICCC)

作者： Wu, Gang Yang, Peng Luo, Jingjing Yu, Li Huazhong Univ Sci & Technol Sch Elect Informat & Commun Wuhan Peoples R China

ISBN: (纸本)9781728107325

The control mechanism of SDN tends to be distributed when the network scale expands. As the number of controllers grows, how to efficiently respond to network events in a timely fashion becomes challenging. Specifically, distributed controllers should reach a consensus on network states before making a network update decision in legacy consensus algorithm, which causes unexpected latency. While eventual correctness algorithms relies on Gossip schemes for fast recovery from network failures, leading to highly redundant controller responses when handling one single network event. In this paper, we aim at developing efficient control algorithm that eliminates unnecessary controller processing, facilitating rapid response to network events. To this end, we design a joint controller selection and message forwarding scheme, which identifies a subset of controllers for control message dissemination. An optimization problem is formulated with the objective of minimizing the total control overhead, which is found to be reducible to the K-center problem. Simulation results show that our method reduces up to 61% of the control overhead compared with legacy benchmarks.

关键词： Convergence consensus algorithm Delays Frequency control Process control Topology Network topology

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Proof-of-Authentication for Scalable Blockchain in Resource-Constrained Distributed Systems

Proof-of-Authentication for Scalable Blockchain in Resource-...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Puthal, Deepak Mohanty, Saraju P. Nanda, Priyadarsi Kougianos, Elias Das, Gautam Univ Technol Sydney Fac Engn & Informat Technol Sydney NSW Australia Univ North Texas Dept Comp Sci & Engn Denton TX 76203 USA Univ North Texas Dept Engn Denton TX 76203 USA Univ Texas Arlington Dept Comp Sci & Engn Arlington TX 76019 USA

ISBN: (纸本)9781538679104

Resource-constrained distributed systems such as the Internet of Things (IoT), edge computing and fog computing are deployed for real-time monitoring and evaluation. Current security solutions are problematic when there is a centralized controlling entity. The blockchain provides decentralized security architectures using proof-of-work (PoW). Proof-of-work is an expensive process for IoT and edge computing due to the deployment of resource-constrained devices. This paper presents a novel consensus algorithm called Proof-of-Authentication (PoAh) to replace Proof-of-Work and introduce authentication in such environments to make the blockchain application-specific. This paper implemented the Proof-of-Authentication system to evaluate its sustainability and applicability for the IoT and edge computing. The evaluation process is conducted in both simulation and real-time testbeds to evaluate performance. Finally, the process of Proof-of-Authentication and its integration with blockchain in resource-constrained distributed systems is discussed. Our proposed PoAh, while running in limited computer resources (e.g. single-board computing devices like the Raspberry Pi) has a latency in the order of 3 secs.

关键词： Blockchain consensus algorithm Proof-of Work Proof-of-Authentication Internet of Things (IoT) Resource constrained distributed systems

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A Distributed Scheme for Economic Optimization Operation and Voltage Recovery with Constant Power Loads(CPLs) in DC Microgrids

A Distributed Scheme for Economic Optimization Operation and...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Beibei Liu Jian Yang Wendong Feng Ya Li Lingqi Fang Quanxu Lv School of Automation Central South University Changsha China

ISBN: (数字)9781728151694

ISBN: (纸本)9781728151700

A fully distributed control scheme is proposed to simultaneously realize optimized economic operation of the DC microgrid with constant power loads (CPLs) and voltage recovery of DC bus. Considering CPL characteristics, an economic dispatch problem is solved to minimize the total generation cost based on consensus algorithm by controlling the output powers of the dispatchable sources. Therefore, unlike traditional centralized control, the distributed control adopted in this paper can greatly reduce the communication cost and speed up dynamic response when the network scale is large. Considering the limits of the generations, the consensus algorithm can achieve economic optimal operation without measuring load changes. On the other hand, average voltage observers are introduced to compensate the voltage drop caused by droop control. Simulation results based on MATLAB/Simulink verify effectiveness of the proposed method.

关键词： Economics Simulation Decentralized control Microgrids consensus algorithm Observers Voltage control

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Preliminary Results of a Multi-Vocal Literature Review of Blockchain Networks

Preliminary Results of a Multi-Vocal Literature Review of Bl...

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Computer Science Society (SCCC) International Conference Chilean FLAGGED

作者： Juan Manuel Sobral Martin Solari Santiago Matalonga Universidad ORT Uruguay Montevideo Uruguay University of the West of Scotland Glasgow United Kingdom

ISBN: (数字)9781728183282

ISBN: (纸本)9781728183299

Blockchain technology has fostered many projects, which have seen in it an alternative to carry out data management without relying on a trusted third party. However, business are failing to adopt this technology, and many applications are left over to proof of concepts. Furthermore, new Blockchain networks are emerging every year, hindering the decision to use this technology. The objective of this work is to have preliminary results on identifying available Blockchain networks. Recognizing their main characteristics: the type of consensus algorithm, centralization, and origin of the network, among others. We carried out a Multi-Vocal Review to identify the available Blockchain networks and analyze their most relevant characteristics. Resulting in a characterization of 112 Blockchain networks, offering a guide for the software developer, so that strategic decisions can be made when incorporating this technology.

关键词： Computer science Blockchain consensus algorithm Software Object recognition Character recognition Business

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Resilient asynchronous rendezvous of second-order agents under communication noise

Resilient asynchronous rendezvous of second-order agents und...

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IEEE Conference on Decision and Control

作者： Mingming Shi

ISBN: (数字)9781728174471

ISBN: (纸本)9781728174488

In this paper, we investigate the problem of rendezvous of second-order agents considering two issues: a) misbehaving agents that make update abnormally and can send arbitrary information to neighbors; b) unknown but bounded communication noise. Both issues can deteriorate the rendezvous performance and even destabilize the systems. We propose a self-triggered resilient rendezvous algorithm, which guarantees that the operation of normal agents is unaffected by the disruption of misbehaving agents and ensures practical rendezvous of normal agents. The position and velocity of normal agents always evolve boundedly, and the agent-to-agent position error converges to be bounded by a value scaling with the magnitude of communication noise. By the proposed algorithm, each agent can sample its neighbors and update its control sporadically and fully asynchronously.

关键词： Delays Damping Velocity measurement Vehicle dynamics Position measurement Heuristic algorithms consensus algorithm

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