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Iso-UniK:lightweight multi-process unikernel through memory protection keys

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Cybersecurity 2018年第1期1卷 34-47页

作者： guanyu li Dong Du Yubin Xia The institute of parallel and distributed systems(IPADS) Shanghai Jiao Tong UniversityDongchuan RoadShanghaiChina

Unikernel,specializing a minimalistic libOS with an application,is an attractive design for cloud ***,the Achilles’heel of unikernel is the lack of multi-process support,which makes it less flexible and *** applications rely on the process abstraction to isolate different *** example,Apache with the multi-processing module isolates a request handler in a process to guarantee *** art tackles the problem by simulating multi-process with multiple unikernels,which is incompatible with existing cloud providers and also introduces high *** paper proposes Iso-UniK,a new unikernel design enabling multi-task applications with the support of both functionality and ***-UniK leverages a recent hardware feature,named Intel Memory Protection Key(Intel MPK),to provide lightweight and efficient isolation for multi-process in *** design has three benefits compared with previous ***,Iso-UniK does not need hypervisor support and is thus compatible with existing cloud computing platforms;second,Iso-UniK promises fast system calls with only 45 cycles;last,a process can be isolated with a flexible *** have implemented a prototype based on OSv,a unikernel system supporting unmodified ***-UniK can achieve fast fork operation with only 66μs for multi-process *** evaluation shows that the isolation and multi-process support in Iso-UniK will not damage the applications’performance.

关键词： Unikernel Multi-process Intel MPK Isolation

Distribution-Transformed Network for Impulse Noise Removal

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Journal of Shanghai Jiaotong university(Science) 2021年第4期26卷 543-553页

作者： li guanyu ZHANG Fengqin liU Qiegen Department of Electronic Information Engineering Nanchang UniversityNanchang330031China

This work aims to explore the restoration of images corrupted by impulse noise via distribution-transformed network (DTN), which utilizes convolutional neural network to learn pixel-distribution features from noisy images. Compared with the traditional median-based algorithms, it avoids the complicated pre-processing procedure and directly tackles the original image. Additionally, different from the traditional methods utilizing the spatial neighbor information around the pixels or patches and optimizing in an iterative manner, this work turns to capture the pixel-level distribution information by means of wide and transformed network learning. DTN fits the distribution at pixel-level with larger receptions and more channels. Furthermore, DTN utilities a residual block without batch normalization layer to generate a good estimate. In terms of edge preservation and noise suppression, the proposed DTN consistently achieves significantly superior performance than current state-of-the-art methods, particularly at extreme noise densities.

关键词： impulse noise removal deep learning convolutional neural network distribution transformation

Graph-decomposed k-NN searching algorithm on road network

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Frontiers of Computer Science 2024年第3期18卷 243-245页

作者： Wei JIANG Bo NING guanyu li Mei BAI Xiao JIA Fangliang WEI Faculty of Information Science and Technology Dalian Maritime UniversityDalian 116026China Jiangxing Intelligence Inc. Shenzhen 518100China

1 Introduction The k-NN(k Nearest Neighbors)searching problem on road network constitutes a crucial aspect of location-oriented services,which has boasted the practical implications.

关键词： services searching network

Group relational privacy protection on time-constrained point of interests

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Frontiers of Computer Science 2023年第3期17卷 239-241页

作者： Bo NING Xiaonan li Fan YANG Yunhao SUN guanyu li George Y.YUAN Faculty of Information Science and Technology Dalian Maritime UniversityDalian 116026China Faculty of Software Dalian University of Foreign LanguagesDalian 116044China Thinvent Digital Technology Co. Ltd.Nanchang 330029China

1 Introduction With the rapid development of mobile networks,locationbased services has become popular in the daily lives of *** service providers can recommend the profitable services to persons through mining the frequent interests or places of ***,one aspect is that the historical data on Internet can easily cause the leakage of user-relationship privacy,another aspect is that the historical interests of person are always bound to ***,this paper devotes to study a privacy protection method on time-constrained point of interests(PoIs)based on the group relationships of users.

关键词： services relational constrained

Radiation-pressure-driven mechanical oscillations in silica microdisk resonators on chip

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Science China(Physics,Mechanics & Astronomy) 2015年第5期58卷 60-63页

作者： WANG GuanZhong ZHAO MingMing MA JiYang li guanyu CHEN Yuan JIANG XiaoShun XIAO Min National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences Nanjing University Department of Physics University of Arkansas

We demonstrate radiation-pressure-driven mechanical oscillations from high optical quality factor silica microdisk resonators on chip. Mechanical quality factors of 3520 in air and 12540 in vacuum for the fundamental radial breathing modes are obtained from 73 μm-diarneter silica microdisks with mechanical frequencies of -51 MHz. The measured mechanical oscillation threshold powers for the input light are determined to be 62.5 μW in air and down to 26.6 μW in vacuum.

关键词： microcavity optomechanics oscillators

Long-Term Extreme Wave Characteristics in the Water Adjacent to China Based on ERA5 Reanalysis Data

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Journal of Ocean University of China 2024年第1期23卷 1-10页

作者： DU Wenyan ZHANG Xuri SHI Hongyuan li guanyu ZHOU Zhengqiao YOU Zaijin ZHANG Kuncheng School of Hydraulic Engineering Ludong UniversityYantai 264025China Center for Ports and Maritime Safety(CPMS) Dalian Maritime UniversityDalian 1160263China Nation Ocean Technology Center Tianjin 300111China Navigation Guarantee Center of South China Sea(NGCS)MOT Guangzhou Hydrographic Center Guangzhou 510320China Institute of Marine Development/Military Teaching Department School of MarxismOcean University of ChinaQingdao 266100China Yantai Kekan Marine Technology Co. Ltd.Yantai 264025China

Extreme waves have a profound impact on coastal infrastructure;thus,understanding the variation law of risky analysis and disaster prevention in coastal zones is *** paper analyzed the spatiotemporal characteristics of extreme wave heights adjacent to China from 1979 to 2018 based on the ERA5 *** extreme value analysis is undertaken in eight repre-sentative points to investigate the trends in the values of 50-and 100-year wave *** show that the mean value of extreme waves is the largest in the eastern part of Taiwan Island and the smallest in the Bohai Sea from 1979 to *** the extreme wave height in the northeastern part of Taiwan Island shows a significant increase trend in the study *** analysis shows remarkable variations in the values of 50-and 100-year significant wave heights in eight *** the annual mean change,E1,E2,S1,and S2 present an increasing trend,while S3 shows a decreasing *** points for the seasonal mean change demon-strate an increasing trend in spring and winter,while other points show a decreasing trend in summer and ***,the E1 point growth rate is large in autumn,which is related to the change in typhoon intensity and the northward movement of the typhoon path.

关键词： extreme wave height NEVA wave climate ERA5 reanalysis

Effect of solar radiation on human thermal sensation and physiological parameters in a convection–radiation air conditioning environment

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Building Simulation 2024年第8期17卷 1359-1377页

作者： guanyu li Dong liu Anjie Hu Qidong Yan lina Ma liu Tang Xiaozhou Wu Jun Wang Zhenyu Wang School of Civil Engineering and Architecture Southwest University of Science and TechnologyMianyang 621010China Sichuan Province Engineering Technology Research Center of Healthy Human Settlement Chengdu 610065China Sichuan University Engineering Design&Research Institute Co.Ltd Chengdu 610065China School of Civil Engineering Dalian University of TechnologyDalian 116081China College of Architecture and Environment Sichuan UniversityChengdu 610065China School of Environment and Resources Southwest University of Science and TechnologyMianyang 621010China

This study focused on the effect of glass structures of modern architecture on the indoor thermal environment during *** particular,this study examined how solar radiation significantly altered people’s thermal *** tests on convection–radiation air conditioning systems were conducted,encompassing 12 different scenarios,including diverse indoor open areas,terminal forms,and levels of solar *** tests aimed to explore the physiological and psychological responses of the human body to solar radiation penetrating through windows into the inner *** the experiments,the participants’subjective thermal sensations and thermal comfort were recorded,along with continuous monitoring of their physiological and environmental *** showed that solar radiation significantly increased local skin temperature,with a maximum rise of 2.15℃.Operative temperature is a reliable indicator of human skin temperature and thermal sensation vote(TSV).This study established two models that could predict the skin temperature of individuals indoors through operative temperature under conditions without or with solar radiation,and identified sensitive ranges of operative temperature for both models,to be specific,26.32℃to 28.43℃and 28.51℃to 34.11℃,***,this study established the relationship between skin temperature and TSV under conditions with and without solar *** results indicate that solar radiation enhances the human body’s adaptability to indoor environmental parameters;a convection–radiation system(FC+RF)could be used to optimize indoor thermal control under solar radiation,achieving more stable environmental temperatures and improved indoor comfort.

关键词： system modeling solar radiation mean skin temperature thermal comfort terminal form irradiation area

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面向物联网的异构实体间关系服务模型

湖南大学学报（自然科学版） 2019年第2期46卷 131-140页

作者：李冠宇安敬民大连海事大学信息科学技术学院辽宁大连116026

物联网中的实体大多以异构形式存在,解决异构问题是推进物联网发展的重要因素.为此,在分析了实体及实体上载到网络中信息的特点后,基于Agent提出一种异构实体关系服务模型.该模型具有实体信息数据处理和构建实体服务逻辑两种功能,利用... 详细信息

物联网中的实体大多以异构形式存在,解决异构问题是推进物联网发展的重要因素.为此,在分析了实体及实体上载到网络中信息的特点后,基于Agent提出一种异构实体关系服务模型.该模型具有实体信息数据处理和构建实体服务逻辑两种功能,利用提出的全新的实体物间动态关系计算公式将异构数据转化为物间关系紧密度(值),并依此生成了A-gent服务序列,结合二分图理论实现物联网环境下的Agent服务逻辑;屏蔽了原本因实体和其信息的异构而使得其无法正常交互通信的缺点,实体通过模型中与之对应的Agent进行交互,并在已构建的服务逻辑下支配Agent;最后对该模型进行了仿真实验,结果表明其可满足物联网环境中的用户服务需求,在数据更新和服务准确率及冲突的处理上要优于传统的本体语义技术对异构问题的处理结果.

关键词：物联网实体异构 Agent 数据处理服务逻辑

基于文献计量分析的国际包容性设计发展概况及其热点研究

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南京艺术学院学报（美术与设计） 2022年第5期 183-187页

作者：李冠羽利兹大学设计学院英国LS29JT

通过文献计量分析法,对包容性设计的期刊文献及其引文进行分析,探讨了其发展趋势、主要特征及相关热点研究。并提出基于我国国情下的未来包容性设计研究方向的相关建议,包括研究结合移动体验以及用户健康的包容性设计和研究基于心理及... 详细信息

通过文献计量分析法,对包容性设计的期刊文献及其引文进行分析,探讨了其发展趋势、主要特征及相关热点研究。并提出基于我国国情下的未来包容性设计研究方向的相关建议,包括研究结合移动体验以及用户健康的包容性设计和研究基于心理及社会层面的包容性设计。

关键词：包容性设计文献计量分析 Citespace 数据可视化