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Accelerating data transfer in dataflow Architectures Through a Look-Ahead Acknowledgment Mechanism

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Journal of Computer Science & Technology 2022年第4期37卷 942-959页

作者： Yu-Jing Feng De-Jian Li Xu Tan Xiao-Chun Ye Dong-Rui Fan Wen-Ming Li Da Wang Hao Zhang Zhi-Min Tang State Key Laboratory of Computer Architecture Institute of Computing TechnologyChinese Academy of SciencesBeijing 100190China Beijing Smartchip Microelectronics Technology Company Limited Beijing 100000China School of Computer and Control Engineering University of Chinese Academy of SciencesBeijing 100190China

The dataflow architecture,which is characterized by a lack of a redundant unified control logic,has been shown to have an advantage over the control-flow architecture as it improves the computational performance and power efficiency,especially of applications used in high-performance computing(HPC).Importantly,the high computational efficiency of systems using the dataflow architecture is achieved by allowing program kernels to be activated in a simultaneous ***,a proper acknowledgment mechanism is required to distinguish the data that logically belongs to different *** solutions include the tagged-token matching mechanism in which the data is sent before acknowledgments are received but retried after rejection,or a handshake mechanism in which the data is only sent after acknowledgments are ***,these mechanisms are characterized by both inefficient data transfer and increased area *** performance of the dataflow architecture depends on the efficiency of data *** order to optimize the efficiency of data transfer in existing dataflow architectures with a minimal increase in area and power cost,we propose a Look-Ahead Acknowledgment(LAA)*** accelerates the execution flow by speculatively acknowledging ahead without *** simulation analysis based on a handshake mechanism shows that our LAA increases the average utilization of computational units by 23.9%,with a reduction in the average execution time by 17.4%and an increase in the average power efficiency of dataflow processors by 22.4%.Crucially,our novel approach results in a relatively small increase in the area and power consumption of the on-chip logic of less than 0.9%.In conclusion,the evaluation results suggest that Look-Ahead Acknowledgment is an effective improvement for data transfer in existing dataflow architectures.

关键词： dataflow model control-flow model high-performance computing application data transfer power efficiency

Influence of data Clouds Fusion From 3D RealTime Vision System on Robotic Group Dead Reckoning in Unknown Terrain

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 368-385页

作者： Mykhailo Ivanov Oleg Sergyienko Vera Tyrsa Lars Lindner Wendy Flores-Fuentes Julio Cesar Rodriguez-Quinonez Wilmar Hernandez Paolo Mercorelli Universidad Autónoma de Baja California MexicaliB.C.21100Mexico Universidad de Las Américas Quito 170125Equador Leuphana University of Lueneburg Lüneburg 21335Germany

This paper proposes the solution of tasks set required for autonomous robotic group behavior optimization during the mission on a distributed area in a cluttered hazardous *** navigation scheme uses the benefits of the original real-time technical vision system(TVS)based on a dynamic triangulation *** method uses TVS output data with fuzzy logic rules processing for resolution *** on previous researches,the dynamic communication network model is modified to implement the propagation of information with a feedback method for more stable data exchange inside the robotic *** to the comparative analysis of approximation methods,in this paper authors are proposing to use two-steps post-processing path planning aiming to get a smooth and energy-saving *** article provides a wide range of studies and computational experiment results for different scenarios for evaluation of common cloud point influence on robotic motion planning.

关键词： data transfer group behavior machine vision navigation robotic group(RG) vision system

Graphical-based data placement algorithm for cloud workflow

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High Technology Letters 2014年第2期20卷 179-186页

作者：张鹏 Wang Guiling Han Yanbo Wang Jing North China University of Technology Institute of Computing Technology Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences

When workflow task needs several datasets from different locations m cloud, data transfer becomes a challenge. To avoid the unnecessary data transfer, a graphical-based data placement algo- rithm for cloud workflow is proposed. The algorithm uses affinity graph to group datasets while keeping a polynomial time complexity. By integrating the algorithm, the workflow engine can intelligently select locations in which the data will reside to avoid the unnecessary data transfer during the initial stage and runtime stage. Simulations show that the proposed algorithm can effectively reduce data transfer during the workflow＇ s execution.

关键词： data placement affinity graph cloud computing workflow data transfer

Static aeroelasticity analysis of a rotor blade using a Gauss-Seidel fluid-structure interaction method

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Advances in Aerodynamics 2023年第1期5卷 478-496页

作者： Jiaxing Li Jiaqi Luo Yaolong Liu Zhonghua Han School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310027China School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

The present study introduces a Gauss-Seidel fluid-structure interaction(FSI)method including the flow solver,structural statics solver and a fast data transfer technique,for the research of structural deformation and flow field variation of rotor blades under the combined influence of steady aerodynamic and centrifugal *** FSI method is illustrated and validated by the static aeroelasticity analysis of a transonic compressor rotor blade,NASA Rotor *** improved local interpolation with data reduction(LIWDR)algorithm is introduced for fast data transfer on the fluid-solid interface of *** results of FSI calculation of NASA Rotor 37 show that when compared with the radial basis function(RBF)based interpolation algorithm,LIWDR meets the interpolation accuracy requirements,while the calculation cost can be greatly *** data transmission time is only about 1%of that of ***,the iteration step of steady flow computation within one single FSI has little impact on the converged aerodynamic and structural *** aerodynamic load-caused deformation accounts for nearly 50%of the *** effects of blade deformation on the variations of aerodynamic performance are given,demonstrating that when static aeroelasticity is taken into account,the choke mass flow rate increases and the peak adiabatic efficiency slightly *** impact mechanisms on performance variations are presented in detail.

关键词： Fluid-structure interaction Rotor blade Static aeroelasticity data transfer aerodynamic performance

Technical study of visible light wavelength division multiplexing using polymer optical fiber

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Chinese Optics Letters 2005年第10期3卷 577-578页

作者：张永生马辉张涛王茁王东郑荣升杨海鹏明海 Department of Physics University of Science and Technology of China Hefei 230026

Visible light wavelength division multiplexing （VWDM） experiment was performed using polymer optical fiber （POF）. Lights of two different wavelengths （650 and 530 nm） were sent to a single POF. Red light （650 nm） was used for 100-Mb/s full duplex IP data transmission and green light （530 nm） was used for voice signal transmission. Light sources are light-emitting diodes （LEDs）. A POF coupler （splitter） and the prisms were employed as multiplexer and demultiplexer, respectively. The channel isolation and insert loss were measured, which are 20.5 and 17.65 dB for 650-nm channel respectively, and 19.16 and 20.55 dB for 530 nm one respectively.

关键词： Communication channels (information theory) data transfer Light Light emitting diodes Light sources Polymers Signal processing Wavelength division multiplexing

Remapping Between Meshes with Isoparametric Cells:a Case Study

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Communications on Applied Mathematics and Computation 2024年第3期6卷 1551-1574页

作者： Mikhail Shashkov Konstantin Lipnikov Applied Mathematics and Plasma Physics Group Theoretical DivisionLos Alamos National LaboratoryMail StopB284LosAlamosNM87545USA Continuum Models and Numerical Methods Group X-Computational Physics DivisionLos Alamos National LaboratoryMail Stop F644Los AlamosNM 87545USA

We explore an intersection-based remap method between meshes consisting of isoparametric *** present algorithms for the case of serendipity isoparametric elements(QUAD8 elements)and piece-wise constant(cell-centered)d... 详细信息

关键词： Isoparametric meshes data transfer Ramapping

Methods for Controlling the Authenticity of Textual Information transfer on the Basis of Statistical and Structural Redundancy

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International Journal of Automation and computing 2012年第5期9卷 518-529页

作者： Akmal R.Akhatov Department of Information Technologies Samarkand State University

In this paper,the problem of increasing information transfer authenticity is *** to reach a decision,the control methods and algorithms based on the use of statistical and structural information redundancy are *** is assumed that the controllable information is submitted as the text element images and it contains redundancy,caused by statistical relations and non-uniformity probability distribution of the transmitted *** use of statistical redundancy allows to develop the adaptive rules of the authenticity control which take into account non-stationarity properties of image data while transferring the *** structural redundancy peculiar to the container of image in a data transfer package is used for developing new rules to control the information authenticity on the basis of pattern recognition *** techniques offered in this work are used to estimate the authenticity in structure of data transfer *** results of comparative analysis for developed methods and algorithms show that their parameters of efficiency are increased by criterion of probability of undetected mistakes,labour input and cost of realization.

关键词： Authenticity data transfer text element structural and statistical redundancy probability of non-detected mistakes

Design and implementation of the optical fiber control and transmission module in multi-channel broadband digital receiver

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Optoelectronics Letters 2014年第5期10卷 369-373页

作者：赵英潇张月范立杰李卫星陈曾平 State Key Laboratory of Automatic Target Recognition National University of Defense Technology

An optical fiber control and transmission module is designed and realized based on Virtex-7 field programmable gata array(FPGA), which can be applied in multi-channel broadband digital receivers. The module consists of sampling data transfer submodule and multi-channel synchronous sampling control submodule. The sampling data transmission in 4× fiber link channel is realized with the self-defined transfer protocol. The measured maximum data rate is 4.97 Gbyte/s. By connecting coherent clocks to the transmitter and receiver endpoints and using the self-defined transfer protocol, multi-channel sampling control signals transferred in optical fibers can be received synchronously by each analog-to-digital converter(ADC) with high accuracy and strong anti-interference ability. The module designed in this paper has certain reference value in increasing the transmission bandwidth and the synchronous sampling accuracy of multi-channel broadband digital receivers.

关键词： Analog to digital conversion data transfer Field programmable gate arrays (FPGA) Light transmission

Finite Element Simulation of Rod and Wire Continuous Rolling

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Journal of Shanghai Jiaotong university(Science) 2011年第2期16卷 195-198页

作者：张立文岳重祥原思宇阮金华顾森东高慧菊 School of Materials Science and Engineering Dalian University of Technology Dongbei Special Steel Group Corporation

This paper discusses the application of several techniques involved in the development of the 3D finite element (FE) models of rod and wire continuous rolling *** FE models are implemented into the FE-program *** and used to investigate the thermal and mechanical behavior of billet during the rolling *** nonlinear equations included in the models are solved by the static and dynamic procedures,*** transfer technique is proposed to keep the continuity of simulation *** the computational time of static procedure is significantly reduced by using a rigid pushing *** all models,the constant time step method and the auto time step method are respectively used to define time step for the solution of *** results of the models with different time step methods are *** comparison between calculated values and measured ones of the temperature at the surface of billet shows the validity of the FE models.

关键词： rod and wire rolling finite element (FE) simulation data transfer auto time step