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SDN性能优化技术研究综述 被引量:7
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作者 孙涛 张俊星 《计算机科学》 CSCD 北大核心 2018年第B11期84-91,共8页
软件定义网络(Software-Defined Network,SDN)是一种新兴的网络架构,完全解耦了数据平面与控制平面。控制平面集中制定并下发全网决策,数据平面单纯负责数据转发。通过控制平面的开放接口,SDN实现了网络的可编程性。在未来SDN大面积部... 软件定义网络(Software-Defined Network,SDN)是一种新兴的网络架构,完全解耦了数据平面与控制平面。控制平面集中制定并下发全网决策,数据平面单纯负责数据转发。通过控制平面的开放接口,SDN实现了网络的可编程性。在未来SDN大面积部署应用的过程中,各个平面的性能优化技术将面临诸多挑战。首先,分析了SDN架构中控制平面和数据平面的性能优化技术的发展现状。其次,总结了各平面性能优化过程中所面临的问题。最后,展望了SDN性能优化方面的未来研究趋势。 展开更多
关键词 软件定义网络 控制平面 数据平面 性能优化技术
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GPU矩阵乘法和FFT算法的性能优化 被引量:5
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作者 李晓雯 崔翔 《现代电子技术》 2013年第4期80-84,共5页
当前GPU的体系结构为高性能计算提供了良好的可编程性。为了得到众核GPU高性能程序设计的一般方法,探索GPU程序性能优化技术,对在GPU上进行高性能程序设计的经验进行了总结。通过基准测试,得到GPU性能指标,对GPU程序设计进行指导。使用C... 当前GPU的体系结构为高性能计算提供了良好的可编程性。为了得到众核GPU高性能程序设计的一般方法,探索GPU程序性能优化技术,对在GPU上进行高性能程序设计的经验进行了总结。通过基准测试,得到GPU性能指标,对GPU程序设计进行指导。使用CUDA对单精度矩阵乘法和FFT进行性能优化,前一个算法是计算密集型任务,后一个算法是带宽密集型任务。在NVIDIA GeForce GTX280 GPU上,矩阵乘法算法达到393 Gflop/s的峰值速度,比CUBLAS 2.0数学库提高了5%;对于一些维度的FFT计算也取得了较好的性能。 展开更多
关键词 GPU程序设计 矩阵乘法 快速傅里叶变换 性能优化技术
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Advances in the Fabrication of Perovskite Solar Cells by Roll-to-Roll Technology
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作者 ZHAO Jiawei CHEN Haolin +1 位作者 LUO Ni LIU Zhenguo 《材料导报》 北大核心 2025年第1期98-114,共17页
In recent years,perovskite solar cells(PSCs)have garnered significant attention as a potential mainstream technology in the future photovol-taic(PV)market.This is primarily attributed to their salient advantages inclu... In recent years,perovskite solar cells(PSCs)have garnered significant attention as a potential mainstream technology in the future photovol-taic(PV)market.This is primarily attributed to their salient advantages including high efficiency,low cost,and ease of preparation.Nota-bly,the power conversion efficiency(PCE)of PSCs has experienced a remarkable increase from 3.8%in 2009 to over 26%at present.Conse-quently,the adoption of roll-to-roll(R2R)technology for PSCs is considered a crucial step towards their successful commercialization.This arti-de reviews the diverse substrates,scalable deposition techniques(such as solution-based knife-coating and spraying technology),and optimiza.tion procedures employed in recent years to enhance device performance within the R2R process.Additionally,novel perspectives are presented to enrich the existing knowledge in this field. 展开更多
关键词 perovskite solar cells roll-to-roll technology substrate scalable deposition technology performance optimization
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Obsolescence optimization of electronic and mechatronic components by considering dependability and energy consumption 被引量:1
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作者 M.A.Mellal S.Adjerid +2 位作者 D.Benazzouz S.Berrazouane E.J.Williams 《Journal of Central South University》 SCIE EI CAS 2013年第5期1221-1225,共5页
Nowadays, rapid technological progress influences the dependability of equipments and also causes rapid obsolescence. The mechatronic and electronic equipment components are mostly affected by obsolescence. A new chal... Nowadays, rapid technological progress influences the dependability of equipments and also causes rapid obsolescence. The mechatronic and electronic equipment components are mostly affected by obsolescence. A new challenger unit possesses identical functionalities, but with higher performances. This work aims to find the optimal number of components which should be replaced by new-type units, under budgetary constraints. In this work, the new challenger unit is characterized by lower energy consumption and the optimization steps are based on genetic algorithm (GA). The result shows the importance of this type of replacement in order to economize energy consumption and to deal with obsolescence. 展开更多
关键词 OBSOLESCENCE lower energy consumption mechatronic and electronic components genetic algorithm
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