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石化智能工厂研究与构建

当代石油石化 2024年第2期32卷 41-46页

作者：贾梦达李剑峰宫向阳石化盈科信息技术有限责任公司北京100020 中国石油化工集团有限公司信息和数字化管理部北京100728

智能工厂作为实现智能制造的重要抓手,为制造企业数字化转型提供了有效途径。文章阐述了国内外石化企业智能工厂建设历程及建设内容,分析国家智能制造能力成熟度评估模型与评估方法,结合石化企业业务特点,进行中国石化行业智能工厂业务... 详细信息

智能工厂作为实现智能制造的重要抓手,为制造企业数字化转型提供了有效途径。文章阐述了国内外石化企业智能工厂建设历程及建设内容,分析国家智能制造能力成熟度评估模型与评估方法,结合石化企业业务特点,进行中国石化行业智能工厂业务环节的能力成熟度评估与能力特征总结。基于对中国石化行业智能工厂的阶段性判断,对下一代石化智能工厂业务特征进行了预测分析,提出了建设思路与重点建设内容,为我国石化智能工厂的建设提供支撑。

关键词：智能制造石化行业智能工厂成熟度评估智能场景

Developing an atmospheric aging evaluation model of acrylic coatings:A semi-supervised machine learning algorithm

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1617-1627页

作者： Yiran Li Zhongheng Fu xiangyang Yu Zhihui Jin Haiyan gong Lingwei Ma Xiaogang Li Dawei Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China BRI Southeast Asia Network for Corrosion and Protection(MOE) Shunde Innovation School of University of Science and Technology BeijingFoshan 528399China

To study the atmospheric aging of acrylic coatings,a two-year aging exposure experiment was conducted in 13 representative climatic environments in *** atmospheric aging evaluation model of acrylic coatings was developed based on aging data including11 environmental factors from 567 cities.A hybrid method of random forest and Spearman correlation analysis was used to reduce the redundancy and multicollinearity of the data set by dimensionality reduction.A semi-supervised collaborative trained regression model was developed with the environmental factors as input and the low-frequency impedance modulus values of the electrochemical impedance spectra of acrylic coatings in 3.5wt%NaCl solution as *** model improves accuracy compared to supervised learning algorithms model(support vector machines model).The model provides a new method for the rapid evaluation of the aging performance of acrylic coatings,and may also serve as a reference to evaluate the aging performance of other organic coatings.

关键词： acrylic coatings coatings aging atmospheric environment machine learning

A Novel Packet Marking Algorithm in Context-aware Autonomic QoS Framework

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China Communications 2009年第4期6卷 98-107页

作者： gong xiangyang Wang Wendong Li Yan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications 100876 Beijing P.R. China

Autonomic networking is one of the hot research topics in the research area of future network *** this paper, we introduce context-aware and autonomic attributes into DiffServ QoS framework, and propose a novel autonomic packet marking(APM) *** the proposed autonomic QoS framework, APM is capable of collecting various QoS related contexts, and adaptively adjusting its behavior to provide better QoS guarantee according to users' requirements and network *** results show that APM provides better performance than traditional packet marker, and significantly improves user's quality of experience.

关键词： QoS 计算机网络 APM 通信

Virtual network embedding in software-defined hybrid networks

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The Journal of China Universities of Posts and Telecommunications 2018年第4期25卷 75-85页

作者： Xu Ran Wang Wendong gong xiangyang Que Xirong State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunication

Network virtualization provides a powerful way of sharing substrate networks. Efficient allocation of network resources for multiple virtual networks( VNs) has always been a challenging task. Especially under the everincreasing demand of customized VN requests,many problems arise as network conditions change *** with the emergance of resource conflict alongside the development of VNs,service provider( SP) needs to provide a faster and more effective solution. Recently,software defined network( SDN) has emerged as a new networking paradigm,SDN’s centralized control and customizable routing features present new opportunities for convenient and flexible embedding VNs in the network. However,due to the limitations of SDN,replacing all legacy devices in current operational networks by SDN-enabled switches in a short span of time is ***,in our study,we focus on the scenario of VN embedding( VNE) in software-defined hybrid networks. In this work,first of all,we propose partially deploying SDN nodes; and then,we use the characteristics of SDN to allocate resources for VN requests,and redirect the path for requests conflict in hybrid SDN network. We formulate the problems and provide simple algorithms to solve them. Simulation results show that our scheme has high ratio in responsiveness and acceptance.

关键词： SDN hybrid network VNE

On the feasibility and efficacy of control traffic protection in software-defined networks

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Science China(Information Sciences) 2015年第12期58卷 44-62页

作者： HU YanNan WANG WenDong gong xiangyang QUE XiRong CHENG ShiDuan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

Software Defined Networking(SDN) is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data planes introduces new challenges regarding resilient communications between the two. That is, disconnections between switches and their controllers could result in substantial packet loss and performance *** paper addresses this challenge by studying the issue of control traffic protection in SDNs with arbitrary numbers of controllers. Specifically, we propose a control traffic protection scheme that combines both local rerouting and constrained reverse path forwarding protections, through which switches can locally react to failures and redirect the control traffic using standby backup forwarding options. Our goal is then to find a set of primary routes for control traffic, called protected control network, where as many switches as possible can benefit from the proposed protection scheme. We formulate the protected control network problem, prove its NP-hardness, and develop an algorithm that reconciles protectability and performance(e.g., switch-to-control latency). Through extensive simulations based on real topologies, we show that our approach significantly improves protectability of control traffic. The results should help further the process of deploying SDN in real-world networks.

关键词： software-defined network protection control traffic resilience optimization

Rapid resolution of subdural hematoma after targeted epidural blood patch treatment in patients with spontaneous intracranial hypotension

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Chinese Medical Journal 2014年第11期127卷 2063-2066页

作者： Wang Jin Zhang Dan gong xiangyang Ding Meiping Department of Neurology Sir Run Run Shaw Hospital Zhejiang University School of Medicine Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University Hangzhou Zhejiang 310016 China Department of Radiology Sir Run Run Shaw Hospital Zhejiang University School of Medicine Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University Hangzhou Zhejiang 310016 China Department of Neurology The Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou Zhejiang 310009 China

Background Subdural hematoma （SDH） is a common complication of spontaneous intracranial hypotension （SIH）.To date,the management of SDH caused by SIH remains *** this paper,we reviewed the clinical course of SDH in patients with SIH,and discuss the underlying mechanism and attributing factors for rapid resolution of subdural hematomas after epidural blood patch （EBP） *** We retrospectively reviewed a cohort of seventy-eight SIH patients diagnosed and treated with targeted EBP in our neurology *** who received early CT/MRI follow-up after EBP operation were *** A series of four cases of SIH complicated with SDHs were *** follow-up neuroimages of these patients revealed that SDHs could be partially or totally absorbed just two to four days after targeted epidural blood patch *** Targeted epidural blood patch can result in rapid hematoma regression and good recovery in some patients with a combination of SDH and SIH.

关键词： cerebrospinal fluid leak spontaneous intracranial hypotension subdural hematoma epidural blood patch

Engineering of Reversible Luminescent Probes for Real-Time Intravital Imaging of Liver Injury and Repair

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CCS Chemistry 2022年第1期4卷 356-368页

作者： Xiao Liu Linhui He xiangyang gong Yue Yang Dan Cheng Juanjuan Peng Lu Wang Xiao-Bing Zhang Lin Yuan State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082 State Key Laboratory of Natural Medicines School of Basic Medical Sciences and Clinical PharmacyChina Pharmaceutical UniversityNanjingJiangsu 211198 Department of Chemical Biology Max Planck Institute for Medical ResearchHeidelberg 69120

As the major organ for drug metabolism and detoxification,the liver is prone to damage and severely impaired *** treatment of liver diseases is based on a clear understanding of the process underlying liver injury and ***,intravital real-time imaging of liver injury and repair is still limited due to the lack of in vivo reversible visualization *** this end,we proposed a rational design strategy for the development of a reversible upconversion luminescence nanoprobe that allows real-time and in vivo imaging of liver injury and repair *** a proof of concept,we first developed a small molecule probe NB3 which can reversibly respond to related analytes of early liver injury[peroxynitrite(ONOO−)]and liver repair[glutathione(GSH)].The small molecule probe was then integrated with a core–shell upconversion nanoparticle to form a sophisticated *** with traditional small molecule probes,this nanoprobe exhibited a higher selectivity to ONOO−,longer retention time in liver,and wider dynamic response range to GSH after oxidation by ONOO−.The novel nanoprobe facilitated the successful monitoring and discrimination among the different degrees of liver injury and repair in a mouse model.

关键词： luminescent probes liver injury and repair fluorescence imaging peroxynitrite GSH

Coverage Area Based Opportunistic Forwarding Algorithm in VANETs

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China Communications 2012年第12期9卷 56-67页

作者： Ding Yu Wang Wendong gong xiangyang Cui Yong Wang Bai State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 P. R. China Department of Computer Science and Technology Tsinghua University Beijing 100084 P. R. China School of Computer Science Beijing University of Posts and Telecommunications Beijing 100876 P. R. China

The highly mobility of vehicles,intermittent communication between the vehicles and the requirements of real time applications are some of the main challenges of multi-hop message delivery in Vehicular Ad Hoc Networks(VANETs).There are also additional challenges,especially when the destination for the message delivery is a moving *** this paper,we propose a novel multi-hop message delivery method,called the Coverage Area-based oPportunistic message forwarding algorithm(CAP).The main idea of CAP is to cover the potential area of a moving target vehicle as much as possible with the reachable area of the required delivery messages,so that the message can be delivered *** the success ratio and overhead of the multi-hop message delivery are two important but incompatible parameters in CAP,two tunings are discussed in the algorithm in order to maintain the balance of the two *** simulation results show that compared with other reference approaches,CAP provides an efficient message delivery with a higher success ratio and a shorter message delay.

关键词：覆盖区域算法转发消息传递网路无线车用 CAP

On Reliability-optimized Controller Placement for Software-Defined Networks

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China Communications 2014年第2期11卷 38-54页

作者： HU Yannan WANG Wendong gong xiangyang QUE Xirong CHENG Shiduan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 PR.China

By decoupling control plane and data plane,Software-Defined Networking(SDN) approach simplifies network management and speeds up network *** benefits have led not only to prototypes,but also real SDN *** wide-area SDN deployments,multiple controllers are often required,and the placement of these controllers becomes a particularly important task in the SDN *** paper studies the problem of placing controllers in SDNs,so as to maximize the reliability of SDN control *** present a novel metric,called expected percentage of control path loss,to characterize the reliability of SDN control *** formulate the reliability-aware control placement problem,prove its NP-hardness,and examine several placement algorithms that can solve this *** extensive simulations using real topologies,we show how the number of controllers and their placement influence the reliability of SDN control ***,we also found that,through strategic controller placement,the reliability of SDN control networks can be significantly improved without introducing unacceptable switch-to-controller latencies.

关键词：可靠性优化网络管理软件定义控制器放置控制网络 SDN 数据平面