检索结果-南通市图书馆

XPull: A Relay-Based Blockchain Intercommunication Framework Achieving Cross-Chain State Pulling

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第5期33卷 1261-1273页

作者： Xinyu LIANG Jing CHEN Ruiying DU School of Cyber Science and Engineering Wuhan University

Cross-chain technology, which enables different blockchains to intercommunicate with one another,is challenging. Many existing cross-chain platforms, such as Polkadot and Cosmos, generally adopt a relay-based scheme: A relaychain(relay blockchain) receives and records the state information from every parachain(parallel blockchain), and publish the information on the platform, by which parachains are able to efficiently acquire the state information from one another. In the condition when parachain is consortium blockchain, the cross-chain platform cannot work properly. On the one hand, whether state information is submitted to relaychain is completely decided by the internal decision of parachain. The timeliness of state information cannot be guaranteed. On the other hand, the transfer of state information will be interrupted due to the failure of parachain or relaychain-parachain connection. In this paper, we propose a relay-based blockchain intercommunication framework, called XPull(crosspulling). Specifically, to ensure the timeliness of state information, we propose a cross-chain state pulling scheme based on cosigned state pulling agreement. To solve the interruption of state transfer, we propose a random scheduling scheme to resume the transfer, or confirm the failure of parachain. The security analysis and experimental results demonstrate that XPull is secure and efficient.

关键词： processor scheduling Real-time systems Blockchains Consensus protocol Security Relays Blockchain interoperability Cross-chain State pulling

A Deep Deterministic Policy Gradient-Based Method for Enforcing Service Fault-Tolerance in MEC

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第4期33卷 899-909页

作者： Tingyan LONG Peng CHEN Yunni XIA Yong MA Xiaoning SUN Jiale ZHAO Yifei LYU College of Computer Science Chongqing University School of Computer and Software Engineering Xihua University School of Computer and Information Engineering Jiangxi Normal University School of Computer and Information Science Chongqing Normal University

Mobile edge computing(MEC) provides edge services to users in a distributed and on-demand *** to the heterogeneity of edge applications, deploying latency and resource-intensive applications on resourceconstrained devices is a key challenge for service providers. This is especially true when underlying edge infrastructures are fault and error-prone. In this paper, we propose a fault tolerance approach named DFGP, for enforcing mobile service fault-tolerance in MEC. It synthesizes a generative optimization network(GON) model for predicting resource failure and a deep deterministic policy gradient(DDPG) model for yielding preemptive migration *** show through extensive simulation experiments that DFGP is more effective in fault detection and guaranteeing quality of service, in terms of fault detection accuracy, migration efficiency, task migration time, task scheduling time,and energy consumption than other existing methods.

关键词： Fault tolerance Multi-access edge computing processor scheduling Fault detection Image edge detection Fault tolerant systems Quality of service

scheduling Pattern of Time Triggered Ethernet Based on Reinforcement Learning

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2023年第5期32卷 1022-1035页

作者： HE Feng XIONG Li ZHOU Xuan LI Haoruo XIONG Huagang Shenzhen Institute of Beihang University School of Electronics and Information Engineering Beihang University

Time-triggered Ethernet(TTEthernet or TTE for short) is a deterministic and congestion-free network based on the Ethernet standard. It supports mixcritical real-time applications by providing different message classes. The time-triggered(TT) messages have strict end-to-end delay and accurate jitter requirement, and the rate-constrained(RC) messages have less determinism than TT messages but with bounded end-to-end delay requirement. Traditionally, the scheduling of TT messages makes it free of conflicts for the transmission on physical links, but ignoring RC messages scheduling, so it cannot guarantee the transmission of RC messages with a bounded delay. Therefore, the design of TT schedule becomes the key to TTE network applications within avionics environment. In this paper, we propose an algorithm called RLTS based on reinforcement learning and tree search, to optimize the end-to-end delays of both TT and RC messages. Besides, its computation speed is dozens of times faster than satisfied modularity theory(SMT) with asynchronous method for the calculation of the optimal scheduling table. In the case of a large network with more than1000 TT and 1000 RC messages, the RLTS method can find a scheduling timetable in 10 seconds, and reduce the worst-case delay of RC messages averagely by 20% compared to the genetic algorithm. Meanwhile, our algorithm has a good generalization performance, in another word, it can quickly adjust itself to satisfy the scheduling with the similar performance as before. By using our method, the scheduling pattern of TTEthernet is further *** to the experimental results, the uniformly distributed slots scheduling pattern, namely the porosity scheduling model which is usually recommended for TTE application, is not always suitable for general situations.

关键词： Schedules processor scheduling Optimal scheduling Ethernet Reinforcement learning Jitter scheduling

LBA-EC: Load Balancing Algorithm Based on Weighted Bipartite Graph for Edge Computing

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2023年第2期32卷 313-324页

作者： SHAO Sisi LIU Shangdong LI Kui YOU Shuai QIU Huajie YAO Xiaoliang JI Yimu School of Computer Science Nanjing University of Posts and Telecommunications Institue of High Performance Computing and Bigdata Nanjing University of Posts and Telecommunications Nanjing Center of HPC China Jiangsu HPC and Intelligent Processing Engineer Research Center

Compared with cloud computing environment, edge computing has many choices of service providers due to different deployment environments. The flexibility of edge computing makes the environment more complex. The current edge computing architecture has the problems of scattered computing resources and limited resources of single computing node. When the edge node carries too many task requests, the makespan of the task will be delayed. We propose a load balancing algorithm based on weighted bipartite graph for edge computing(LBA-EC), which makes full use of network edge resources, reduces user delay, and improves user service experience. The algorithm is divided into two phases for task scheduling. In the first phase, the tasks are matched to different edge servers. In the second phase, the tasks are optimally allocated to different containers in the edge server to execute according to the two indicators of energy consumption and completion time. The simulations and experimental results show that our algorithm can effectively map all tasks to available resources with a shorter completion time.

关键词： Energy consumption processor scheduling Load management scheduling Bipartite graph Delays Servers

Compositional Synthesis of Discrete Event Systems Using Synthesis Abstraction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Compositional Synthesis of Discrete Event Systems Using Synt...

Configurable Low-Power Arrays for Real-Time Recursive Filtering

2011 Chinese Control and Decision Conference（CCDC）

作者： Sahar Mohajerani Robi Malik Simon Ware Martin Fabian Department of Signal and System Chalmers University of Technology Department of Computer Science University of Waikato

This paper proposes a general method to synthesize a least restrictive supervisor for a large discrete event system model,consisting of a large number of arbitrary automata representing the plants and specifications.A new type of abstraction called synthesis abstraction is introduced and three rules are proposed to calculate an abstraction of a given ***,a compositional algorithm for synthesizing a supervisor for large-scale systems of composed finite-state automata is *** the proposed algorithm,the synchronous composition is computed step by step and intermediate results are simplified according to synthesis *** a supervisor for the abstracted system is calculated,which in combination with the original system gives the least restrictive,nonblocking,and controllable behaviour.

关键词： Automata Discrete event systems Supervisory control processor scheduling Conferences Controllability Maintenance engineering

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Configurable Low-Power Arrays for Real-Time Recursive Filter...

Hardware-Software Cosynthesis of Multitask MPSoCs with Real-Time Constraints

1996 3rd International Conference on Signal Processing(ICSP’96)

作者： Joseph Thomas SGS-Thomson Microelectronics 38019 Grenoble Cedex France

＜正＞This paper explains how a linear array of a fixed number of multiply-accumuJate modules may be configured for real-time recursive filtering over a wide range of sample rates,by trading the latter for filter *** is effected by projecting the computations of multiple recursive and nonrecursive multiply-accumulate operations in infinite impulse response filtering for example,onto one physical multiply-accumulate *** projected multiply-accumulate operations are scheduled in the same sample period using a system clock mat is faster than the sample clock by a factor that equals the projection order,so that the resulting structure is maximally *** projection order（hence the system clock rate） is made configurable,and the supply voltage autoregulates correspondingly so that the system operates economically in respect of the power dissipated.

关键词： IIR filters Delay Filtering Digital signal processing Clocks Nonlinear filters processor scheduling VLIW Registers Sampling methods

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Hardware-Software Cosynthesis of Multitask MPSoCs with Real-...

CALL FOR PAPERS Special Section on Intelligent Optimization and scheduling

2005 6th International Conference on ASIC

作者： Choonseung Lee Soonhoi Ha The CAP Laboratory School of Computer Science and EngineeringSeoul National UniversityKorea

＜正＞The cosynthesis problem addressed in this paper involves three subproblems:selection of appropriate processing elements, mapping and scheduling of function blocks to the selected processing elements,and schedulability *** have presented a cosynthesis framework in our earlier work[1]that defines an iteration loop of three steps that attack the subproblems *** many good features,our previous technique has a severe restriction that a task monopolizes the entire system once *** in general we may obtain higher performance if multiple tasks can be running concurrently on different processor *** is the main contribution of this paper that we extend the previous framework to be applicable for general multiprocessor systems with diverse operating *** demonstrate the performance improvement from the proposed work with a multi-media real-time application,DVR system,and randomly generated multi-task graphs.

关键词： processor scheduling System-on-a-chip Hardware Multiprocessing systems Real time systems Time factors Libraries Space exploration Computer architecture Laboratories

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2020年第5期31卷 1085-1085页

Due to various complexities in real-world systems,intelligent optimization algorithms have been successfully applied to complex problems in a variety of engineering fields which cannot be solved effectively by traditional *** by the behavior,experience,and cognition from nature and society systems,data-driven intelligent optimization aims to achieve consistent results effectively and efficiently based on the mechanisms of computational *** the past decade,increasing attention has been paid to theoretical analysis,

关键词： Optimization Job shop scheduling Systems engineering and theory processor scheduling Transportation Reliability theory Reliability engineering