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An Assignment Method for IPUs in distributed systems

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Journal of Computer Science & Technology 1999年第3期14卷 259-266页

作者：黎亮杨国纬 ComputingCenter ChengduUniversityofElectronicScienceandTechnologyChengdu610054PR.China ComputingCen

In a distributed system, one of the most important things is to establish an assignment method for distributing tasks. It is assumed that a dis tributed system does not have a central administrator, all independent processing units in this system want to cooperate for the best results, but they cannot know the conditions of one another. So in order to undertake the tasks in admirable pro portions, they have to adjust their undertaking tasks only by self-learning. In this paper, the performance of this system is analyzed by Markov chains, and a robust method of self-learning for independent processing units in this kind of systems is presented. This method can lead the tasks of the system to be distributed very well among all the independent processing units, and can also be used to solve the general assignment problem.

关键词： distributed systems independent processing unit (IPU),assignment problem self-learning optima algorithm

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Mobile agent-enabled framework for structuring and building distributed systems on the internet

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Science in China(Series F) 2006年第6期49卷 885-905页

作者： CAO Jiannong ZHOU Jingyang ZHU Weiweit LI Xuhui Internet and Mobile Computing Lab Department of Computing Hong Kong Polytechnic University Hung Hom KLW Hong Kong China State Key Lab of Novel Software Technologies Nanjing University Nanjing 210093 China State Key Lab of Software Engineering Wuhan University Wuhan 430072 China

Mobile agent has shown its promise as a powerful means to complement and enhance existing technology in various application areas. In particular, existing work has demonstrated that MA can simplify the development and improve the performance of certain classes of distributed applications, especially for those running on a wide-area, heterogeneous, and dynamic networking environment like the Internet. In our previous work, we extended the application of MA to the design of distributed control functions, which require the maintenance of logical relationship among and/or coordination of processing entities in a distributed system. A novel framework is presented for structuring and building distributed systems, which use cooperating mobile agents as an aid to carry out coordination and cooperation tasks in distributed systems. The framework has been used for designing various distributed control functions such as load balancing and mutual ex- clusion in our previous work. In this paper, we use the framework to propose a novel approach to detecting deadlocks in distributed system by using mobile agents, which demonstrates the advantage of being adaptive and flexible of mobile agents. We first describe the MAEDD （Mobile Agent Enabled Deadlock Detection） scheme, in which mobile agents are dispatched to collect and analyze deadlock information distributed across the network sites and, based on the analysis, to detect and resolve deadlocks. Then the design of an adaptive hybrid algorithm derived from the framework is presented. The algorithm can dynamically adapt itself to the changes in system state by using different deadlock detection strategies. The performance of the proposed algorithm has been evaluated using simulations. The results show that the algorithm can outperform existing algorithms that use a fixed deadlock detection strategy.

关键词： mobile agent internet computing distributed systems deadlock detection.

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Performance Improvement of distributed systems by Autotuning of the Configuration Parameters

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Tsinghua Science and Technology 2011年第4期16卷 440-448页

作者：张帆曹军威刘连臣吴澄 National CIMS Engineering and Research Center Tsinghua University Research Institute of Information Technology Tsinghua University Tsinghua National Laboratory for Information Science and Technology

The performance of distributed computing systems is partially dependent on configuration parameters recorded in configuration files. Evolutionary strategies, with their ability to have a global view of the structural information, have been shown to effectively improve performance. However, most of these methods consume too much measurement time. This paper introduces an ordinal optimization based strategy combined with a back propagation neural network for autotuning of the configuration parameters. The strat- egy was first proposed in the automation community for complex manufacturing system optimization and is customized here for improving distributed system performance. The method is compared with the covariance matrix algorithm. Tests using a real distributed system with three-tier servers show that the strategy reduces the testing time by 40% on average at a reasonable performance cost.

关键词： distributed systems performance evaluation autotune configuration parameters ordinal optimization covariance matrix algorithm

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Research on efficient edge-chasing deadlock detection/resolution for distributed systems

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High Technology Letters 2006年第4期12卷 408-412页

作者：程欣 Jin Feng Yang Xiaozong School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 P.R. China Lenovo Corporate Research ＆ Development Lenovo Group Beijing 100085 P R China

Numerous edge-chasing deadlock detection algonthms were developed lor the cycle detection in distributed systems, but their detections had the n steps speed limitation and n （ n- 1） overhead limitation to detect a cycle of size n under the one-resource request model. Since fast deadlock detection is critical, this paper proposed a new algorithm to speed up the detection process. In our algorithm, when the running of a transaction node is blocked, the being requested resource nodes reply it with the waiting or being waited message simultaneously, so the blocked node knows both its predecessors and successors, which helps it detecting a cycle of size 2 directly and locally. For the cycle of size n （ n 〉 2）, a special probe is produced which has the predecessors information of its originator, so the being detected nodes know their indirect predecessors and direct successors, and can detect the cycle within n - 2 steps. The proposed algorithm is formally proved to be correct by the invariant verification method. Performance evaluation shows that the message overhead of our detection is （ n^2 - n - 2）/2, hence both the detection speed and message cost of the proposed algorithm are better than that of the existing al gorithms.

关键词： distributed systems fast deadlock detection probe performance evaluation

Challenges and Considerations in Developing and Architecting Large-Scale distributed systems

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International Journal of Internet and distributed systems 2020年第1期4卷 1-13页

作者： Ion-Alexandru Secara Human Factors and Ergonomics Society San Francisco California USA

This paper investigates large-scale distributed system design. It looks at features, main design considerations and provides the Netflix API, Cassandra and Oracle as examples of such systems. Moreover, the paper investigates the challenges of designing, developing, deploying, and maintaining such systems, in regard to the features presented. Finally, the paper discusses aspects of available solutions and current practices to challenges that large-scale distributed systems face.

关键词： distributed systems Concurrency Large-Scale

Towards Global Goal Orientation, Robustness and Integrity of distributed Dynamic systems

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International Relations and Diplomacy 2016年第6期4卷 418-425页

作者： Peter Simon Sapaty National Academy of Sciences of Ukraine Kiev Ukraine

In an addition to the variety of topics in aims and scope of the Journal of International Relations and Diplomacy, we would be happy to offer here some more areas in line with its general orientation, which could be worth investigating, encouraging more paper submissions. These relate to effective organization of large distributed dynamic systems of diverse natures which may require innovative solutions reflecting the growing world dynamics in the 21 st century with emerging challenges and threats to local and global prosperity, stability, and safety.

关键词： international relations world dynamics emerging challenges distributed systems goal orientation integrity interoperability over-operability

Providing Global Awareness in distributed Dynamic systems

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International Relations and Diplomacy 2023年第2期11卷 87-100页

作者： Peter Simon Sapaty National Academy of Sciences of Ukraine KyivUkraine

The paper investigates applicability of the developed high-level model and technology for solution of diverse problems in large distributed dynamic systems which can provide sufficient awareness of their structures,organization,and *** the review of meanings of awareness and existing approaches for its expression and support,the paper shows application of the Spatial Grasp Model and Technology(SGT)and its basic Spatial Grasp Language(SGL)for very practical awareness solutions in large distributed dynamic systems,with obtaining any knowledge from any point inside or outside the *** self-evolving,self-replicating,and self-recovering scenario code in SGL can effectively supervise distributed systems under any circumstances including rapidly changing number of their *** are provided in SGL for distributed networked systems showing how in any node any information about other nodes and links,including the whole system,can be obtained by using network requesting patterns based on recursive scenarios combining forward and backward network matching and *** returned results may be automatically organized in networked patterns *** presented exemplary solutions are parallel and fully distributed,without the need of using vulnerable centralized resources,also very *** can be explained by fundamentally different philosophy and ideology of SGT which is not based on traditional partitioned systems representation and multiple agent *** the contrary,SGT and its basic language supervise and control distributed systems by holistic self-spreading recursive code in wavelike,virus-like,and even“soul-like”mode.

关键词： awareness distributed awareness situational awareness real world awareness global awareness distributed systems Spatial Grasp Technology Spatial Grasp Language networked implementation self-evolving scenarios spatial pattern-matching higher-level knowledge

Controller Design for Voltage Regulation of Inverter-Interfaced distributed Energy systems

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Controller Design for Voltage Regulation of Inverter-Interfa...

Enhancing Security and Privacy in distributed Face Recognition systems through Blockchain and GAN Technologies

2011 Chinese Control and Decision Conference（CCDC）

作者： Gang Chen and Ming Yu are with College of Automation,Chongqing University,Chongqing 400044.

Interconnecting the distributed energy resources with the grid,which forms a distributed energy systems,is a promising way to enable renewable energy integration and to solve global problems such as energy crisis and climate *** regulation is a necessary requirement in the distributed energy systems,particularly in the systems operating in the island mode and serving the voltage-sensitive *** this study,a voltage and active power control scheme is *** achieve high-performance voltage regulation,an adaptive fuzzy-neural controller,which is robust,adaptive,and capable of learning,is *** learning mechanism is derived based on the Lyapunov synthesis approach to guarantee the convergence of the control system.

关键词： Voltage regulation distributed systems Inverter Microgrid

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Computers, Materials & Continua 2024年第5期79卷 2609-2623页

作者： Muhammad Ahmad Nawaz Ul Ghani Kun She Muhammad Arslan Rauf Shumaila Khan Javed Ali Khan Eman Abdullah Aldakheel Doaa Sami Khafaga School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu611731China Department of Computer Science University of Science&TechnologyBannu28100Pakistan Department of Computer Science University of HertfordshireHatfieldAL109ABUK Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia

The use of privacy-enhanced facial recognition has increased in response to growing concerns about data securityand privacy in the digital age. This trend is spurred by rising demand for face recognition technology in a varietyof industries, including access control, law enforcement, surveillance, and internet communication. However,the growing usage of face recognition technology has created serious concerns about data monitoring and userprivacy preferences, especially in context-aware systems. In response to these problems, this study provides a novelframework that integrates sophisticated approaches such as Generative Adversarial Networks (GANs), Blockchain,and distributed computing to solve privacy concerns while maintaining exact face recognition. The framework’spainstaking design and execution strive to strike a compromise between precise face recognition and protectingpersonal data integrity in an increasingly interconnected environment. Using cutting-edge tools like Dlib for faceanalysis,Ray Cluster for distributed computing, and Blockchain for decentralized identity verification, the proposedsystem provides scalable and secure facial analysis while protecting user privacy. The study’s contributions includethe creation of a sustainable and scalable solution for privacy-aware face recognition, the implementation of flexibleprivacy computing approaches based on Blockchain networks, and the demonstration of higher performanceover previous methods. Specifically, the proposed StyleGAN model has an outstanding accuracy rate of 93.84%while processing high-resolution images from the CelebA-HQ dataset, beating other evaluated models such asProgressive GAN 90.27%, CycleGAN 89.80%, and MGAN 80.80%. With improvements in accuracy, speed, andprivacy protection, the framework has great promise for practical use in a variety of fields that need face recognitiontechnology. This study paves the way for future research in privacy-enhanced face recognition systems, emphasizingt

关键词： Facial recognition privacy protection blockchain GAN distributed systems