The impedance of power source of the microgrid cannot be regarded as infinite, thus it may cause stability problems, especially when the load is a pulse power load. The black box method can not be well applied to puls...
The impedance of power source of the microgrid cannot be regarded as infinite, thus it may cause stability problems, especially when the load is a pulse power load. The black box method can not be well applied to pulse power load. To address this issue, a black-box stability analysis method for system with parallel pulse loads is proposed in this paper. Based on the stability condition of the system with single load, the stability condition of the system with parallel load is derived. Finally, 3-D fitting Bode plot are given to analyze the stability of the system with parallel load. Simulations results are given to verify the analysis results.
Smart Factories characterize as context-rich, fast-changing environments where heterogeneous hardware appliances are found beside of also heterogeneous software components deployed in (or directly interfacing with) Io...
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ISBN:
(纸本)9783031197611;9783031197628
Smart Factories characterize as context-rich, fast-changing environments where heterogeneous hardware appliances are found beside of also heterogeneous software components deployed in (or directly interfacing with) IoT devices, as well as in on-premise mainframes, and on the Cloud. This inherent heterogeneity poses major challenges particularly when a high degree of resiliency is needed, and the ubiquitously deployed software components must be replaced or reconfigured at real-time to respond to the most diverse events, ranging from an out-of-range sensor detection, to a new order issued by a customer. In this work, a software framework is presented, which allows to deploy, (re)configure, run, and monitor the most diverse software across all the three layers of the Smart Factory (edge, fog, Cloud), from remote, via API calls, in a standardised uniform manner, relying on containerization technologies, and on a variety of software technologies, frameworks, and programming languages, including Node-RED, MQTT, Scala, Apache Spark, and Kafka. The most recent advances in the framework design, implementation, and demonstration, which led to the introduction of the so-called Crazy Nodes, are presented and motivated. A comprehensive proof-of-concept is given, where user interfaces and distributedsystems are created from scratch via API calls to implement AI-based alerting systems, Big Data stream filtering and transformation, AI model training, storage, and usage for one-shot as well as stream predictions, and real-time Big Data visualization through line plots, histograms, and pie charts.
As large language models (LLMs) become widespread in various application domains, a critical challenge the AI community is facing is how to train these large AI models in a cost-effective manner. Existing LLM training...
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Advanced scientific-computing workflows rely on composable data services to migrate data between simulation and analysis jobs that run in parallel on high-performance computing (HPC) platforms. Unfortunately, these se...
Advanced scientific-computing workflows rely on composable data services to migrate data between simulation and analysis jobs that run in parallel on high-performance computing (HPC) platforms. Unfortunately, these services consume compute-node memory and processing resources that could otherwise be used to complete the workflow’s tasks. The emergence of programmable network interface cards, or SmartNICs, presents an opportunity to host data services in an isolated space within a compute node that does not impact host resources. In this paper we explore extending data services into SmartNICs and describe a software stack for services that uses Faodel and Apache Arrow. To illustrate how this stack operates, we present a case study that implements a distributed, particle-sifting service for reorganizing simulation results. Performance experiments from a 100-node cluster equipped with 100Gb/s BlueField-2 SmartNICs indicate that current SmartNICs can perform useful data management tasks, albeit at a lower throughput than hosts.
The proceedings contain 14 papers. The special focus in this conference is on Dependable softwareengineering: Theories, Tools and Applications. The topics include: Integration of Multiple Formal Matrix Models in...
ISBN:
(纸本)9783031212123
The proceedings contain 14 papers. The special focus in this conference is on Dependable softwareengineering: Theories, Tools and Applications. The topics include: Integration of Multiple Formal Matrix Models in Coq;on-The-Fly Bisimilarity Checking for Fresh-Register Automata;LOGIC: A Coq Library for Logics;Diversifying a parallel SAT Solver with Bayesian Moment Matching;MTUL: Towards Mutation Testing of Unsupervised Learning systems;COOL-MC: A Comprehensive Tool for Reinforcement Learning and Model Checking;VM Migration and Live-Update for Reliable Embedded Hypervisor;mastery: Shifted-Code-Aware Structured Merging;KCL: A Declarative Language for Large-Scale Configuration and Policy Management;eqFix: Fixing LaTeX Equation Errors by Examples;Translating CPS with Shared-Variable Concurrency in SpaceEx;a Contract-Based Semantics and Refinement for Simulink.
With in the trend of intelligence, task cooperation has been emerging as one main feature for Multiple Robot systems (MRS) and applications, typically Multi-UAV (MUAV) system. For such swarm cooperative systems, how t...
With in the trend of intelligence, task cooperation has been emerging as one main feature for Multiple Robot systems (MRS) and applications, typically Multi-UAV (MUAV) system. For such swarm cooperative systems, how to plan and map their tasks to proper members within systems optimally and fast has been one vital issue that affects the efficiency of cooperation. So, in this article, a two-level task model is firstly established, which is the foundation of automatic task parsing and planning. Further, a Genetic Algorithm (GA) based parallel Task Planning algorithm PTP-GA is proposed and designed, the goal of which is to improve the performance via cluster related tasks together and separating the dividing the solution space. Particularly, several constrained operators are designed to warrantee both the randomness and elitist individuals or segments. Finally, this proposed method is verified within a simulated scenario, and it shows that the performance of this parallel algorithm is indeed improved.
Big data analytics (BDA) is a key technology that is used in a variety of corporate fields, including the welfare medical profession. In the actual world, there is no such thing as a flawless security solution for a c...
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In these years of severe chip shortage, it is even more important to improve the efficiency of chip manufacturing. As is well known, manufacturing phases rely on increasingly intelligent production machinery, which mu...
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ISBN:
(数字)9798350364606
ISBN:
(纸本)9798350364613
In these years of severe chip shortage, it is even more important to improve the efficiency of chip manufacturing. As is well known, manufacturing phases rely on increasingly intelligent production machinery, which must ensure high quality and large volumes. That is true also for die-bonding machines, which are required to satisfy very high standards of speed and accuracy. For this purpose, such devices have started to evaluate the possibility of adopting computer vision algorithms for automatic recognition of wafer positioning and die size. This paper proposes an FPGA accelerated implementation of one of these algorithms, demonstrating the advantages of using this technology to this end and paving the way towards a larger adoption of this kind of acceleration platform for the different tasks composing modern industrial motion control systems. At the state of the art, such systems are typically managed with software-oriented solutions, which may not be sufficient in the case of highly restrictive requirements in terms of execution time. For this reason, the design flow considered the use of high-level hardware design, which offers a more software-friendly solution to developers without in-depth hardware knowledge. The proposed solution is a state-of-the-art implementation for execution time and resources of programmable logic while enabling higher precision in terms of die position estimation.
Due to the privacy advantages of federated learning (FL), federated recommendation systems (FedRSs) are gaining popularity for improving recommendation performance through training on local data. However, FedRSs frequ...
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ISBN:
(数字)9798331509712
ISBN:
(纸本)9798331509729
Due to the privacy advantages of federated learning (FL), federated recommendation systems (FedRSs) are gaining popularity for improving recommendation performance through training on local data. However, FedRSs frequently face the significant challenge of high communication costs between the server and clients. Most FedRSs utilize a client-server communication architecture, leading to heavy communication loads and single points of failure due to dependence on a central server. Clients may also encounter problems due to limited communication resources. In view of this challenge, in this paper, we propose a blockchain-assisted federated learning method at edge for communication-efficient recommendation systems, named BFedRec. Specifically, BFedRec reduces reliance on the central server by utilizing blockchain systems on edge servers to aggregate and distribute the recommendation model. To mitigate the high communication costs between clients and blockchain in each iteration, a communication-efficient training algorithm is used that trains the recommendation model directly on low-rank compressed parameters. Finally, we conduct extensive experiments on real-world datasets to verify the communication efficiency of BFedRec compared to existing methods. The experimental results show that BFedRec effectively improves communication efficiency without compromising recommendation performance.
With the rapid development of information technology, people have put forward higher requirements for the audio-visual experience and usage functions of conference spaces. The traditional, single-function conference r...
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ISBN:
(数字)9798350391954
ISBN:
(纸本)9798350391961
With the rapid development of information technology, people have put forward higher requirements for the audio-visual experience and usage functions of conference spaces. The traditional, single-function conference room configuration can no longer adapt to the diverse needs of modern work and interactive activities. How to achieve efficient management and control, seamless interconnection, and resource sharing of audio systems across spaces, while ensuring the acoustic characteristics and flexibility of each independent space, has become a core issue that needs to be urgently resolved in building a multi-hall, multifunctional conference room cluster. Based on the audio system project of the Academic Center of the Communication University of China, this paper proposes a solution for a conference room cluster audio system based on a distributed architecture. This solution not only overcomes the limitations of traditional systems in terms of scalability, collaborative work, and resource scheduling but also promotes lossless transmission, real-time processing, and adaptive configuration of audio signals. Thus, it ensures the consistency and high quality of the audio experience within the entire cluster, providing practical guidance for the design and optimization of future conference room audio systems.
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