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A homogenization-planning-tracking method to solve cooperative autonomous motion control for heterogeneous carrier dispatch systems

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Chinese Journal of Aeronautics 2022年第9期35卷 293-305页

作者： Jie LIU Xianzhou DONG Xinwei WANG Kaikai CUI Xiwang QIE Jun JIA War Research Institute Academy of Military SciencesBeijing 100850China Department of Engineering Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentDalian University of TechnologyDalian 116024China Naval Aeronautical University Yantai 264000China Baimtec Materials Co. LtdBeijing 100094China

Taxiing aircraft and towed aircraft with drawbar are two typical dispatch modes on the flight deck of aircraft carriers. In this paper, a novel hierarchical solution strategy, named as the Homogenization-Planning-Tracking(HPT) method, to solve cooperative autonomous motion control for heterogeneous carrier dispatch systems is developed. In the homogenization layer, any towed aircraft system involved in the sortie task is abstracted into a virtual taxiing aircraft. This layer transforms the heterogeneous systems into a homogeneous configuration. Then in the planning layer, a centralized optimal control problem is formulated for the homogeneous system. Compared with conducting the path planning directly with the original heterogeneous system, the homogenization layer contributes to reduce the dimension and nonlinearity of the formulated optimal control problem in the planning layer and consequently improves the robustness and efficiency of the solution process. Finally, in the tracking layer, a receding horizon controller is developed to track the reference trajectory obtained in the planning layer. To improve the tracking performance,multi-objective optimization techniques are implemented offline in advance to determine optimal weight parameters used in the tracking layer. Simulations demonstrate that smooth and collision-free cooperative trajectory can be generated efficiently in the planning phase. And robust trajectory tracking can be realized in the presence of external disturbances in the tracking *** developed HPT method provides a promising solution to the autonomous deck dispatch for unmanned carrier aircraft in the future.

关键词： Autonomous motion control Carrier dispatch system heterogeneous system Cooperative trajectory planning Receding horizon control Weight optimization

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An Intra-Server Interconnect Fabric for heterogeneous Computing

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Journal of Computer Science & Technology 2014年第6期29卷 976-988页

作者：曹政Zheng Cao 刘小丽李强刘小兵王展安学军 CCF ACM State Key Laboratory of Computer Architecture Institute of Computing TechnologyChinese Academy of Sciences

With the increasing diversity of application needs and computing units, the server with heterogeneous pro- cessors is more and more widespread. However, conventional SMP/ccNUMA server architecture introduces communication bottleneck between heterogeneous processors and only uses heterogeneous processors as coprocessors, which limits the efficiency and flexibility of using heterogeneous processors. To solve this problem, this paper proposes an intra-server inter- connect fabric that supports both intra-server peer-to-peer interconnection and I/O resource sharing among heterogeneous processors. By connecting processors and I/O devices with the proposed fabric, heterogeneous processors can perform direct communication with each other and run in stand-alone mode with shared intra-server resources. We design the proposed fabric by extending the de-facto system I/O bus protocol PCIe （Peripheral Computer Interconnect Express） and implement it with a single chip cZodiac. By making full use of PCIe＇s original advantages, the interconnection and the I/O sharing mechanism are light weight and efficient. Evaluations that have been carried out on both the FPGA （Field Programmable Gate Array） prototype and the cycle-accurate simulator demonstrate that our design is feasible and scalable. In addition, our design is suitable for not only the heterogeneous server but also the high density server.

关键词： heterogeneous system interconnection I/O virtualization PCI-express

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Hetero-DB： Next Generation High-Performance Database systems by Best Utilizing heterogeneous Computing and Storage Resources

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Journal of Computer Science & Technology 2015年第4期30卷 657-678页

作者：张凯陈峰丁晓宁槐寅李如豹罗天王凯博袁源张晓东 Department of Computer Science and Technology University of Science and Technology of China Hefei 230027 China Department of Computer Science and Engineering The Ohio State University Columbus OH 43210 U.S.A. Department of Computer Science and Engineering Louisiana State University Baton Rouge LA 70803 U.S.A. Department of Computer Science New Jersey Institute of Technology Newark NJ 07102 U.S.A. Databricks Inc. San Francisco CA 94105 U.S.A. VMware Inc. Palo Alto CA 94304 U.S.A.

With recent advancement on hardware technologies, new general-purpose high-performance devices have been widely adopted, such as the graphics processing unit （GPU） and solid state drive （SSD）. GPU may offer an order of higher throughput for applications with massive data parallelism, compared with the multicore CPU. Moreover, new storage device SSD is also capable of offering a much higher I/O throughput and lower latency than a traditional hard disk device （HDD）. These new hardware devices can significantly boost the performance of many applications;thus the database community has been actively engaging in adopting them into database systems. However, the performance benefit cannot be easily reaped if the new hardwares are improperly used. In this paper, we propose Hetero-DB, a high-performance database system by exploiting both the characteristics of the database system and the special properties of the new hardware devices in system’s design and implementation. Hetero-DB develops a GPU-aware query execution engine with GPU device memory management and query scheduling mechanism to support concurrent query execution. Furthermore, with the SSD-HDD hybrid storage system, we redesign the storage engine by organizing HDD and SSD into a two-level caching hierarchy in Hetero-DB. To best utilize the hybrid hardware devices, the semantic information that is critical for storage I/O is identified and passed to the storage manager, which has a great potential to improve the e？ciency and performance. Hetero-DB aims to maximize the performance benefits of GPU and SSD, and demonstrates the effectiveness for designing next generation database systems.

关键词： database heterogeneous system GPU SSD

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Optimal resource allocation solutions for heterogeneous cognitive radio networks

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Digital Communications and Networks 2017年第2期3卷 129-139页

作者： Babatunde Awoyemia Bodhaswar Maharaj Attahiru Alfa Department of Electrical Electronic and Computer Engineering University of Pretoria Pretoria 0002 South Africa Department of Electrical and Computer Engineering University of Manitoba Canada

Cognitive Radio Networks （CRN） are currently gaining immense recognition as the most-likely next-generation wireless communication paradigm, because of their enticing promise of mitigating the spectrum scarcity and/or underutilisation challenge. Indisputably, for this promise to ever materialise, CRN must of necessity devise appropriate mechanisms to judiciously allocate their rather scarce or limited resources （spectrum and others） among their numerous users. ＇Resource Allocation （RA） in CRN＇, which essentially describes mechanisms that can effectively and optimally carry out such allocation, so as to achieve the utmost for the network, has therefore recently become an important research focus. However, in most research works on RA in CRN, a highly significant factor that describes a more realistic and practical consideration of CRN has been ignored （or only partially explored）, i.e., the aspect of the heterogeneity of CRN. To address this important aspect, in this paper, RA models that incorporate the most essential concepts of heterogeneity, as applicable to CRN, are developed and the imports of such inclusion in the overall networking are investigated. Furthermore, to fully explore the relevance and implications of the various heterogeneous classifications to the RA formulations, weights are attached to the different classes and their effects on the network performance are studied. In solving the developed complex RA problems for heterogeneous CRN, a solution approach that examines and exploits the structure of the problem in achieving a less-complex reformulation, is extensively employed. This approach, as the results presented show, makes it possible to obtain optimal solutions to the rather difficult RA problems of heterogeneous CRN.

关键词： Cognitive radio network heterogeneous system Linear and non-linear programming Resource allocation

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Morphological Instability of Phase Interface between Pyroelectric Domains

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Journal of Applied Mathematics and Physics 2023年第2期11卷 541-554页

作者： Michael Grinfeld Pavel Grinfeld U.S. Army Laboratory Aberdeen Proving Ground USA Drexel University Philadelphia USA

The Gibbs-like variational methodology is applied to the heterogeneous systems with rigid pyroelectric or pyromagnetic domains. The processes of depolarization/demagnetization are taken into account by assuming the spatial mobility of the interfaces. The simplest configuration of flat interface separating rigid pyroelectric half-spaces permits explicit analysis of morphological stability.

关键词： Pyro- and Ferroelectricity Pyro- and Ferromagnetism heterogeneous system Variational Principles Cardinal Tensors Morphological Instabilities

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High Speed Internet Access using Grid Computing 2nd

High Speed Internet Access using Grid Computing

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2011 2nd International Conference on Networking and Information Technology（ICNIT 2011）

作者： R Dinesh C.Ajit Nataraj SSN College of Engineering KalavakkamChennaiIndia-603 110

＜正＞1. Introduction Grid computing is all about to create the illusion of a simple yet large and powerful self managing virtual computer out of a large collection of connected heterogeneous systems sharing various c... 详细信息

ISBN: (纸本)9789810706807

关键词： Communication Research high-bandwidth High speed access Resource sharing heterogeneous system Grid computing Virtual

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异构系统中独立任务的集中带宽分配算法

异构系统中独立任务的集中带宽分配算法

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2005年全国理论计算机科学学术年会

作者：曲绍云李袁媛许日滨青岛大学信息工程学院青岛大学信息工程学院青岛大学信息工程学院

＜正＞ 1 问题定义本文研究异构多机系统的映射问题,其主要工作是将大量独立的,等大小的任务分配到异构的多机系统中。假设异构系统中有m个处理机和一台负责系统集中调度的调度器。调度器与各处理机间的通信采用独占方式,即任一时刻只... 详细信息

＜正＞ 1 问题定义本文研究异构多机系统的映射问题,其主要工作是将大量独立的,等大小的任务分配到异构的多机系统中。假设异构系统中有m个处理机和一台负责系统集中调度的调度器。调度器与各处理机间的通信采用独占方式,即任一时刻只允许一个处理机与调度器进行通信。此外,处理机在处理每个任务前都需要从调度器接收该任务的初始数据,并且处理机

关键词： Distributed system Task schedule heterogeneous system Heuristics

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异构环境下一种实现负载均衡的MIMO反馈控制模型

异构环境下一种实现负载均衡的MIMO反馈控制模型

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2006年全国理论计算机科学学术年会

作者：吴长俊曾国荪刘涛同济大学计算机科学及技术系国家高性能计算机工程技术中心同济分中心

＜正＞1 引言当今,随着电子商务的迅速发展,要求后台服务器处理的任务越来越多。这些任务的实时性迫切需要高性能的服务器;但是这些服务器价格往往比较昂贵,而且具有其专用的应用领域,因此也就不具备良好的可扩展性,也就是不能动态地添... 详细信息

＜正＞1 引言当今,随着电子商务的迅速发展,要求后台服务器处理的任务越来越多。这些任务的实时性迫切需要高性能的服务器;但是这些服务器价格往往比较昂贵,而且具有其专用的应用领域,因此也就不具备良好的可扩展性,也就是不能动态地添加服务器以

关键词： Load-balancing heterogeneous system MIMO feed-back control Resource management

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