检索结果-南通市图书馆

HSCS:a hybrid shared cache scheduling scheme for multiprogrammed workloads

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2018年第6期12卷 1090-1104页

作者： Jingyu ZHANG Chentao WU Dingyu YANG Yuanyi CHEN xiaodong meng Liting XU Minyi GUO Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation School of Computer and Communication EngineeringChangsha University of Science and TechnologyChangsha 410004China School of Electronics and Information Shanghai Dianji UniversityShanghai 200240China

The traditional dynamic random-access memory (DRAM) storage medium can be integrated on chips via modern emerging 3D-stacking technology to architect a DRAM shared cache in multicore systems. Compared with static random-access memory (SRAM), DRAM is larger but slower. In the existing research, a lot of work has been devoted to improving the workload performance using SRAM and stacked DRAM together in shared cache systems, ranging from SRAM structure improvement to optimizing cache tags and data access. However, little attention has been paid to designing a shared cache scheduling scheme for multiprogrammed workloads with different memory footprints in multicore systems. Motivated by this, we propose a hybrid shared cache scheduling scheme that allows a multicore system to utilize SRAM and 3D-stacked DRAM efficiently, thus achieving better workload performance. This scheduling scheme employs (1) a cache monitor, which is used to collect cache statistics; (2) a cache evaluator, which is used to evaluate the cache information during the process of programs being executed; and (3) a cache switcher, which is used to self-adaptively choose SRAM or DRAM shared cache modules. A cache data migration policy is naturally developed to guarantee that the scheduling scheme works correctly. Extensive experiments are conducted to evaluate the workload performance of our proposed scheme. The experimental results showed that our method can improve the multiprogrammed workload performance by up to 25% compared with state-of-the-art methods (including conventional and DRAM cache systems).

关键词： multicore system shared cache workload performance

A Rural Woman Supports Five College Students

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Women of China 1994年第1期 16-17页

作者： ZHAO HONGMEI and meng xiaodong MAN SUJIE

SEEING off her youngest daughter, Zhang Xiling, in her fifties and tired, leaned against a low, old and dilapidated house made of mud. The little hill village looked very quiet at dusk; the hilly road in the evening glow zigzaged further away. This common rural woman stared at the hilly road where she watched her dreams go as all her children went away one by one. In 1978, Nie Wenhai, her oldest son, was admitted to Harbin Col-

关键词： Zhang Ni A Rural Woman Supports Five College Students

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于大数据的光纤传感网络入侵检测系统

激光杂志 2019年第8期40卷 98-101页

作者：孟小冬冯锋呼伦贝尔学院计算机学院内蒙古呼伦贝尔021000 宁夏大学信息工程学院银川750000

针对传统的光纤传感网络入侵检测系统,在大数据环境下存在检测时间过长、检测率偏低、误报率较高等问题,设计基于大数据的光纤传感网络入侵检测系统。虚拟机主要利用PC机模拟一个网络设备,将客户操作系统的光纤传感网络设备连接到PC机... 详细信息

针对传统的光纤传感网络入侵检测系统,在大数据环境下存在检测时间过长、检测率偏低、误报率较高等问题,设计基于大数据的光纤传感网络入侵检测系统。虚拟机主要利用PC机模拟一个网络设备,将客户操作系统的光纤传感网络设备连接到PC机的网桥上,通过PC机实现光纤传感网络设备的虚拟。在大数据的环境下,将光纤传感网络入侵检测系统与虚拟化的网络特征相结合,利用Xen的半虚拟技术,实现大数据下的光纤传感网络入侵检测。实验结果表明,该检测系统能够快速、准确检测出光纤传感网络数据中存在的入侵数据,同时检测误报率不到4%,说明所提系统具有更好的性能。

关键词：大数据光纤传感网络入侵检测系统

在线全文

学校读者我要写书评

暂无评论

考虑不规则风浪影响的最小油耗航速模型

上海海事大学学报 2016年第1期37卷 19-24页

作者：孟晓东袁章新上海船舶运输科学研究所运输系统事业部上海200135

为提高单船营运能效,提出一种考虑不规则风浪影响的最小油耗航速定量计算模型.首先进行航段划分,获取海况数据;然后通过增加航行功率修正船舶失速的方法,构建考虑风浪影响的单位时间油耗模型;最后以每航段航速为决策变量,建立最小油耗... 详细信息

为提高单船营运能效,提出一种考虑不规则风浪影响的最小油耗航速定量计算模型.首先进行航段划分,获取海况数据;然后通过增加航行功率修正船舶失速的方法,构建考虑风浪影响的单位时间油耗模型;最后以每航段航速为决策变量,建立最小油耗航速非线性优化模型.考虑到实船应用中最小油耗航速优化算法需具有快速寻找全局最优解的特点,设计初始值算法.以实船某航次运营为例进行了油耗及最小油耗航速计算,结果显示:每海里油耗模型理论值与实测值相对误差在可接受范围内;与不考虑不规则风浪影响的计算模型(平均航速)相比较,采用这种方法计算出的油耗减少了1%,节能效果初见成效.

关键词：不规则风浪油耗模型最小油耗航速数学模型

Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 361-377页

作者： Feng He Sitong Chen Ruili Zhou Hanyu Diao Yangyang Han xiaodong Wu School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced *** to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static ***,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic ***,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential *** controllable and reversible polarization process of the conjugated polymers is fully in situ ***,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference *** with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior *** demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning *** tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关键词： Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition

在线全文

学校读者我要写书评

暂无评论

小型LNG加注船通航横向风险距离定量计算

中国航海 2015年第3期38卷 89-93页

作者：孟晓东袁章新上海船舶运输科学研究所航运技术与安全国家重点实验室上海200135

为保障小型内河液化天然气(Liquefied Natural Gas,LNG)加注船的通航安全,提出一种定量计算LNG加注船通航过程中横向风险距离的方法。采用国际定量风险评价(Quantitative Risk Analysis,QRA)的通用理念进行小型LNG加注船通航过程危险源... 详细信息

为保障小型内河液化天然气(Liquefied Natural Gas,LNG)加注船的通航安全,提出一种定量计算LNG加注船通航过程中横向风险距离的方法。采用国际定量风险评价(Quantitative Risk Analysis,QRA)的通用理念进行小型LNG加注船通航过程危险源识别,建立LNG储罐不同孔径泄漏(包括自身疲劳所致泄漏和外力所致泄漏)概率数据库;通过计算LNG火灾发生概率及后果所致个人风险,并依据个人风险可接受标准,最终确定LNG加注船通航过程中的横向风险距离。利用该方法对某小型内河LNG加注船通航过程横向风险距离进行定量计算。结果表明:该距离与LNG加注船通航次数及通航水域交通流密度等因素有关,在交通流密度较大水域设置横向安全距离是有必要的。

关键词：水路运输液化天然气加注船定量风险分析风险距离

在线全文

学校读者我要写书评

暂无评论

长三角城市群碳中和潜力评价与实现策略研究

规划师 2022年第3期38卷 61-67页

作者：王垚朱美琳王勇李萌孟晓东苏州科技大学建筑与城市规划学院苏州科技大学建筑与城市规划学院党委厦门市城市规划设计研究院有限公司

文章基于“统计数据+大数据”的多源数据,从人居环境科学视角构建城市群碳中和潜力评价体系,测度长三角城市群碳中和潜力指数,分析碳中和潜力空间格局与聚类特征,结果发现:长三角城市群碳中和潜力呈现出明显的核心—边缘结构,与城市经... 详细信息

文章基于“统计数据+大数据”的多源数据,从人居环境科学视角构建城市群碳中和潜力评价体系,测度长三角城市群碳中和潜力指数,分析碳中和潜力空间格局与聚类特征,结果发现:长三角城市群碳中和潜力呈现出明显的核心—边缘结构,与城市经济发展水平、行政层级呈现明显的空间一致性,并且存在明显的省域空间差异;空间聚类表现为城镇化主导、产业主导、生态主导、交通主导4种类型,呈现出典型的地域集聚特征。在此基础上,文章提出构建“碳排权—发展权”区域协调机制、实施“以碳定人”的城市规模管控及开展“因城治碳”的国土空间规划等策略建议。

关键词：碳中和潜力评价人居环境多源数据长三角城市群

Multi-Stage Voltage Control Optimization Strategy for Distribution Networks Considering Active-Reactive Co-Regulation of Electric Vehicles

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2025年第1期122卷 221-242页

作者： Shukang Lyu Fei Zeng Huachun Han HuiyuMiao Yi Pan xiaodong Yuan Electric Power Research Institute State Grid Jiangsu Electric Power Co.Ltd.Nanjing211103China

The high proportion of uncertain distributed power sources and the access to large-scale random electric vehicle(EV)charging resources further aggravate the voltage fluctuation of the distribution network,and the existing research has not deeply explored the EV active-reactive synergistic regulating characteristics,and failed to realize themulti-timescale synergistic control with other regulatingmeans,For this reason,this paper proposes amultilevel linkage coordinated optimization strategy to reduce the voltage deviation of the distribution ***,a capacitor bank reactive power compensation voltage control model and a distributed photovoltaic(PV)activereactive power regulationmodel are ***,an external characteristicmodel of EVactive-reactive power regulation is developed considering the four-quadrant operational characteristics of the *** optimization model of the distribution network is then constructed considering the time-series coupling constraints of multiple types of voltage regulators.A multi-timescale control strategy is proposed by considering the impact of voltage regulators on active-reactive EV energy consumption and PV energy ***,a four-stage voltage control optimization strategy is proposed for various types of voltage regulators with multiple time ***-objective optimization is solved with the improvedDrosophila algorithmto realize the power fluctuation control of the distribution network and themulti-stage voltage control *** results validate that the proposed voltage control optimization strategy achieves the coordinated control of decentralized voltage control resources in the distribution *** effectively reduces the voltage deviation of the distribution network while ensuring the energy demand of EV users and enhancing the stability and economic efficiency of the distribution network.

关键词： Electric vehicle(EV) distribution network multi-stage optimization active-reactive power regulation voltage control

论自媒体时代高校思想政治理论课教学创新的三重维度

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高校学生工作研究 2019年第2期 97-102页

作者：孟晓东辽宁科技大学马克思主义学院

进入自媒体时代后,高校思想政治理论课教学有效性流失问题日益显著,在这种情况下,思想政治理论课需要积极吸纳发展中的"增量",利用新技术和新媒体实现授课形式的突破;密切关注现实中的"变量",在问题意识的指导下研究各种新现象、新问题... 详细信息

进入自媒体时代后,高校思想政治理论课教学有效性流失问题日益显著,在这种情况下,思想政治理论课需要积极吸纳发展中的"增量",利用新技术和新媒体实现授课形式的突破;密切关注现实中的"变量",在问题意识的指导下研究各种新现象、新问题,做到"化危为机";注重发掘历史中的"存量",发掘师生的潜力,发挥好教师的主导作用和学生的主体作用。借助对这三个维度的创新,力争在教学创新中解决发展中出现的新问题和原来存在的老问题,增强思想政治理论课的针对性、实效性和趣味性,提高学生的参与感、存在感和收获感。

关键词：思想政治理论课教学创新自媒体