检索结果-内蒙古大学图书馆

Ways of Compromising Blockmesh

学校读者我要写书评

暂无评论

Ways of Compromising Blockmesh

IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRusNW)

作者： Sviatoslav O. Dmitriev Alyaksandra V. Kazlova Igor A. Turovskiy Leonid O. Fedorov Department of Computer Systems and Technologies National Research Nuclear University "MEPhI" Moscow Russian Federation

ISBN: (数字)9781728157610

ISBN: (纸本)9781728157627

Nowadays blockchain is used in many spheres of our life. But even though this idea promises a high level of security and each new protocol seems to improve the technology, it is still not perfect. In this article, we concentrate on the new blockchain protocol, called "Blockmesh". The article starts with a brief introduction into the blockchain technology in general and then moves on to describing Blockmesh, its features and ways of compromising it. To test our assumptions we'll create the environment, simulating the system work. Our goal is to review the possibilities and weaknesses of the new protocol and to explore the cases of Blockmesh providing a higher level of security.

关键词： Blockchain Servers Protocols Peer-to-peer computing Bitcoin consensus algorithm

Hybrid CGME and TCGME algorithms for large-scale general-form regularization

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Yang, Yanfei School of mathematics and computation science Zhejiang A&F University Hangzhou300113 China

Two new hybrid algorithms are proposed for large-scale linear discrete ill-posed problems in general-form regularization. They are both based on Krylov subspace inner-outer iterative algorithms. At each iteration, they need to solve a linear least squares problem, which is the inner least squares problem. It is proved that inner linear least squares problems, solved by LSQR, become better conditioned as k increases, so LSQR converges faster. We also prove how to choose the stopping tolerance for LSQR to guarantee that the computed and exact best regularized solutions have the same accuracy. Numerical experiments are provided to demonstrate the effectiveness and efficiency of our new hybrid algorithms, along with comparisons to the existing *** Codes 65F22, 65F10, 65J20, 65F35, 65F50 Copyright © 2023, The Authors. All rights reserved.

关键词： consensus algorithm

Distributed exact multi-objective quantum search algorithm

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Li, Hao Qiu, Daowen Luo, Le Institute of Quantum Computing and Software School of Computer Science and Engineering Sun Yat-sen University Guangzhou510006 China The Guangdong Key Laboratory of Information Security Technology Sun Yat-sen University Guangzhou510006 China Shenzhen Research Institute of Sun Yat-Sen University Nanshan Shenzhen518057 China QUDOOR Technologies Inc. China School of Physics and Astronomy Sun Yat-sen University Zhuhai519082 China

Multi-objective search means searching for any one of several objectives in an unstructured database. Grover’s algorithm has quadratic acceleration in multi-objection search than classical ones. Iterated operator in Grover’s algorithm is a key element and plays an important role in amplitude amplification. In this paper, we design two distributed iterated operators and therefore two new distributed Grover’s algorithms are obtained with the following advantages: (1) Compared to Grover’s algorithm and the modified Grover’s algorithm by Long, our distributed algorithms require fewer qubits;(2) Compared to the distributed Grover’s algorithm proposed by Qiu et al., one of our distributed algorithms is exact. Of course, both our distributed algorithms require quite quantum communication and involve a number of more complicated unitary operators as cost, but there still may have certain advantage of physical realizability in the Noisy Intermediate-Scale Quantum (NISQ) era. Copyright © 2024, The Authors. All rights reserved.

关键词： consensus algorithm

A Simple algorithm for Worst Case Optimal Join and Sampling

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Capelli, Florent Irwin, Oliver Salvati, Sylvain Université d'Artois CNRS UMR 8188 CRIL LensF-62300 France Université de Lille CNRS Inria UMR 9189 CRIStAL LilleF-59000 France

We present an elementary branch and bound algorithm with a simple analysis of why it achieves worstcase optimality for join queries on classes of databases defined respectively by cardinality or acyclic degree constraints. We then show that if one is given a reasonable way for recursively estimating upper bounds on the number of answers of the join queries, our algorithm can be turned into algorithm for uniformly sampling answers with expected running time Õ(UP/OUT) where UP is the upper bound, OUT is the actual number of answers and Õ(·) ignores polylogarithmic factors. Our approach recovers recent results on worstcase optimal join algorithm and sampling in a modular, clean and elementary way. © 2024, CC BY-SA.

关键词： consensus algorithm

An Efficient Technique for Improving Trust and Privacy in Blockchain as a Service (BaaS)

学校读者我要写书评

暂无评论

An Efficient Technique for Improving Trust and Privacy in Bl...

IEEE Students' Conference on Electrical, Electronics and Computer Science (SCEECS)

作者： Sonali Vishwajeet Shinge Urmila Shrawankar Computer Science & Engg. Dept. G. H. Raisoni College of Engineering Nagpur (MS) India Computer Science & Engineering Deptartment G. H. Raisoni College of Engineering Nagpur (MS) India

Cloud computing is a developing technology used for providing various services such as PaaS, IaaS and SaaS for various applications based on the pay as per usage. The foundation of trust is the assurance and confidence that information, people, entities, data, or processes will deliver the desired outcome with a particular level of assurance. Many times, users even do not have knowledge about processing their personal information over the clouds. In cloud computing, centralized architecture is used for trust modeling, which causes various trust and privacy issues. The trust model is subject to a number of limitations, including single point failure, overload, vulnerability to malicious assaults, particularly harmful recommendations, and lack of accessibility and untraceability of trust proof. There are numerous initiatives underway to increase confidence between cloud users and CSPs. The privacy issues including data leakage and compromising data integrity in the cloud environment. The blockchain technology can provide the solution for the above issues. The Blockchain technology has various advantages as it is decentralized in nature, immutable ledgers, providing full transparency, Instant traceability, data encrypted end-to-end. In the proposed system hybrid consensus algorithms are created to overcome problems of the existing blockchain consensus algorithm. By using blockchain technology creates a Blockchain as a Service (BaaS) in the cloud environment to improve the trust and privacy of users.

关键词： Computer science Cloud computing Privacy Data privacy Computational modeling Data integrity consensus algorithm

TWO PARALLEL DYNAMIC LEXICOGRAPHIC algorithmS FOR FACTORIZATION SETS IN NUMERICAL SEMIGROUPS

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Barron, Thomas Denver CO United States

To the existing dynamic algorithm FactorizationsUpToElement for factorization sets of elements in a numerical semigroup, we add lexicographic and parallel behavior. To the existing parallel lexicographic algorithm for the same, we add dynamic behavior. The (dimensionwise) dynamic algorithm is parallelized either elementwise or factorizationwise, while the parallel lexicographic algorithm is made dynamic with low-dimension tabulation. The tabulation for the parallel lexicographic algorithm can itself be performed using the dynamic algorithm. We provide reference CUDA implementations with measured *** Codes 90C39, 68W10, 11-04 Copyright © 2024, The Authors. All rights reserved.

关键词： consensus algorithm

Blockchain for securing ai applications and open innovations

学校读者我要写书评

暂无评论

Journal of Open Innovation: Technology, Market, and Complexity 2021年第3期7卷 189页

作者： Shinde, Rucha Patil, Shruti Kotecha, Ketan Ruikar, Kirti Symbiosis Institute of Technology Symbiosis International (Deemed University) Pune 412115 India Symbiosis Centre for Applied Artificial Intelligence (SCAAI) Symbiosis Institute of Technology Symbiosis International (Deemed University) Pune 412115 India School of Architecture Building and Civil Engineering Loughborough University Loughborough LE11 3TU United Kingdom

Nowadays, open innovations such as intelligent automation and digitalization are being adopted by every industry with the help of powerful technology such as Artificial Intelligence (AI). This evolution drives systematic running processes, involves less overhead of managerial activities and increased production rate. However, it also gave birth to different kinds of attacks and security issues at the data storage level and process level. The real-life implementation of such AI-enabled intelligent systems is currently plagued by the lack of security and trust levels in system predictions. Blockchain is a prevailing technology that can help to alleviate the security risks of AI applications. These two technologies are complementing each other as Blockchain can mitigate vulnerabilities in AI, and AI can improve the performance of Blockchain. Many studies are currently being conducted on the applicability of Blockchains for securing intelligent applications in various crucial domains such as healthcare, finance, energy, government, and defense. However, this domain lacks a systematic study that can offer an overarching view of research activities currently going on in applying Blockchains for securing AI-based systems and improving their robustness. This paper presents a bibliometric and literature analysis of how Blockchain provides a security blanket to AI-based systems. Two well-known research databases (Scopus and Web of Science) have been examined for this analytical study and review. The research uncovered that idea proposals in conferences and some articles published in journals make a major contribution. However, there is still a lot of research work to be done to implement real and stable Blockchain-based AI systems. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

关键词： Artificial intelligence Blockchain consensus algorithm Federated learning Open innovation Smart contract

Agent Based Distributed Control of Islanded Microgrid - Real-Time Cyber-Physical Implementation

学校读者我要写书评

暂无评论

Agent Based Distributed Control of Islanded Microgrid - Real...

IEEE PES Innovative Smart Grid Technologies Conference Europe

作者： Tung Lam NGUYEN Quoc-Tuan TRAN Raphael CAIRE Catalin GAVRILUTA Van Hoa NGUYEN CEA-INES FRANCE Grenoble Electrical Engineering Laboratory (G2ELAB) Grenoble France Grenoble Electrical Engineering Laboratory Grenoble France

In the hierarchical control of an islanded microgrid, secondary control could be centralized or distributed. The former control strategy has several disadvantages, such as single point of failure at the level of the central controller as well as high investment of communication infrastructure. In this paper a three-layer architecture of distributed control is given, including the device layer, the control layer as well as the agent layer. The agent layer is a multi-agent system in which each agent is in charge of a distributed generation unit. Due to communication network constraints, agents are connected only to nearby neighbors. However, by using consensus algorithms the agents can discover the required global information and compute new references for the control layer. The proposed control system is tested on a microgrid scenario which includes paralleled inverter sources. For this, the system is implemented on a real-time cyber-physical test platform that combines real-time simulation models running in OPAL-RT with a network of ARM-based computers, representing the agents.

关键词： Microgrids Distributed control Real-time simulation Cyber-physical system consensus algorithm

A Decentralized Power Allocation Strategy for the EV Charging Network

学校读者我要写书评

暂无评论

A Decentralized Power Allocation Strategy for the EV Chargin...

IEEE Innovative Smart Grid Technologies - Asia

作者： Guibin Wang Hairong Li Huaizhi Wang Xian Zhang Feng Zhang College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China Department of Electrical Engineering The Hong Kong Polytechnic University Hong Kong 999077 China Department of Electrical Engineering Shandong University Jinan 250100 China

ISBN: (纸本)9781538642924

nowadays, developing electric vehicles (EVs) is an important measure to reduce the greenhouse effect of the traditional transportation system. While the number of EVs growing rapidly, how to charge EVs efficiently attracts researchers' attention. Different from the traditional centralized charging power allocation, which is operated by a centralized control computer collecting all information and sending the commands to EVs, in this paper the decentralized power allocation strategy for EV charging network is proposed. Moreover, the centralized algorithm requires a high quality communication network, which cannot handle disturbances in communication like delays or packet losses. Therefore, the consensus algorithm is applied here to realize the efficiency and robust power allocation of the EV charging network in a decentralized fashion. The effectiveness of the proposed strategy has been fully investigated in three different cases.

关键词： Electric vehicles consensus algorithm Charging network