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Research on the Legal Framework of Content Regulations for Network Platforms
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作者 Zhang Yin Liao Xinyue 《Contemporary Social Sciences》 2024年第1期137-155,共19页
In the era of the Internet,various network platforms have evolved into new hubs for information dissemination.Currently,China has established a platform-centered content regulation framework,wherein platforms proactiv... In the era of the Internet,various network platforms have evolved into new hubs for information dissemination.Currently,China has established a platform-centered content regulation framework,wherein platforms proactively enforce content regulations in accordance with legal censorship obligations.Additionally,platform policies and user agreements augment their authority in content regulation.The platforms can achieve cost-effective and highly efficient content regulation by leveraging their strategic advantages enabled by their own technical capabilities and extensive coverage.The platform self-regulation model,however,still faces challenges.First,accurately evaluating content remains a formidable task;second,ensuring effective platform publicity through self-regulation poses difficulties;third,users may potentially face disadvantages due to the platform’s right of self-regulation;and fourth,digital copyright owners face challenges when defending digital copyright disputes under the safe harbor rule.Therefore,it is imperative to establish,review,and revise the legal framework for content regulation of network platforms in order to enhance the efficiency of their governance systems.The formulation of the legal framework for content regulation of network platforms may encompass the following aspects:rationalizing obligations pertaining to platform content regulations,enhancing supervision over platform self-regulation,and establishing a dual-track responsibility system for digital copyright content regulation.This will ensure a harmonious balance among public interests,users’personal rights and interests,and commercial benefits through regulating the content on network platforms. 展开更多
关键词 content regulations platform self-regulation legal framework
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基于Kubernetes的工业AI项目开发平台
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作者 沈文枫 邓荣 +2 位作者 刘政森 杜雨航 陆唯佳 《计算机应用与软件》 北大核心 2024年第5期15-20,48,共7页
随着人工智能(AI)成为改变世界的前沿技术,企业也迫切需要系统地开发和实现人工智能来升级新一代工业系统的基础。考虑到将人工智能应用开发集成到工业开发中存在开发流程环节多、AI项目开发人员能力背景不一等问题,以企业实际需求为背... 随着人工智能(AI)成为改变世界的前沿技术,企业也迫切需要系统地开发和实现人工智能来升级新一代工业系统的基础。考虑到将人工智能应用开发集成到工业开发中存在开发流程环节多、AI项目开发人员能力背景不一等问题,以企业实际需求为背景设计实现了一个AI项目开发平台。探讨了人工智能项目开发平台的概念和实现,并且基于企业实际需求对其进行定制化。在传统开发流程基础上完善更多开发工作流环节。在企业内部成功进行部署和测试。结果表明:项目开发平台的功能合理、运行正常、管理便捷对AI项目开发效率、体验、规范化有积极影响,提高了计算加速部件利用率。 展开更多
关键词 Kubernetes 机器学习平台 工作流
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Development of a target capture sequencing SNP genotyping platform for genetic analysis and genomic breeding in rapeseed 被引量:2
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作者 Xiaodong Li Xumei Liu +11 位作者 Yonghai Fan Shengting Li Mengna Yu Mingchao Qian Yuling Chen Hongqiao Chen Xinchun Li Bei Liu Xinfu Xu Cunmin Qu Jiana Li Kun Lu 《The Crop Journal》 SCIE CSCD 2023年第2期499-510,共12页
Rapeseed(Brassica napus)is an oil crop grown worldwide,making it a key plant species in molecular breeding research.However,the complexity of its polyploid genome increases sequencing costs and reduces sequencing accu... Rapeseed(Brassica napus)is an oil crop grown worldwide,making it a key plant species in molecular breeding research.However,the complexity of its polyploid genome increases sequencing costs and reduces sequencing accuracy.Target capture coupled with high-throughput sequencing is an efficient approach for detecting genetic variation at genomic regions or loci of interest.In this study,588 resequenced accessions of rapeseed were used to develop a target capture sequencing SNP genotyping platform named BnaPan50T.The platform comprised 54,765,with 54,058 resequenced markers from the pan-genome,and 855 variant trait-associated markers for 12 agronomic traits.The capture quality of BnaPan50T was demonstrated well in 12 typical accessions.Compared with a conventional genotyping array,BnaPan50T has a high SNP density and a high proportion of SNPs in unique physical positions and in annotated functional genes,promising wide application.Target capture sequencing and wholegenome resequencing in 90 doubled-haploid lines yielded 60%specificity,78%uniformity within tenfold coverage range,and 93%genotyping accuracy for the platform.BnaPan50T was used to construct a genetic map for quantitative trait loci(QTL)mapping,identify 21 unique QTL,and predict several candidate genes for yield-related traits in multiple environments.A set of 132 core SNP loci was selected from BnaPan50T to construct DNA fingerprints and germplasm identification resources.This study provides genomics resources to support target capture sequencing,genetic analysis and genomic breeding of rapeseed. 展开更多
关键词 RAPESEED Target capture SNP genotyping platform Genomic breeding
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基于.NET的番茄果园视觉特征管理系统
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作者 李晶 王妍玮 《安徽农业科学》 CAS 2024年第1期236-240,244,共6页
介绍了一种基于.NET平台的番茄果园视觉特征管理系统,旨在提高番茄果实的检测和识别效率,促进农业生产的智能化发展。随着信息技术的发展与普及,越来越多的农业生产活动开始向数字化、智能化的方向转变。同时,随着人口增长和城市化进程... 介绍了一种基于.NET平台的番茄果园视觉特征管理系统,旨在提高番茄果实的检测和识别效率,促进农业生产的智能化发展。随着信息技术的发展与普及,越来越多的农业生产活动开始向数字化、智能化的方向转变。同时,随着人口增长和城市化进程的加速,人们对蔬菜和水果的需求越来越大,对水果品质的要求也越来越高。而作为现代农业中重要的经济作物之一,番茄的种植和管理对于果农们来说至关重要。为了提高番茄种植的生产效率和品质,帮助果农实现对番茄种植全过程的管理。以位于辽宁省大连市旅顺口区某番茄果园为例,对系统框架的搭建,包括系统的数据结果和框架,同时对传感器数据和图像数据进行处理和数据分析,实现对果园内番茄的生长状态和品质的实时监测和管理,提高番茄果园的生产效率和品质,增加果农的生产效益和经济效益。 展开更多
关键词 .net平台 番茄果园 管理系统 分类识别
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基于OneNET云平台的智慧消防远程监控系统的设计
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作者 李楠 苏航 +1 位作者 张安莉 徐艳 《电子设计工程》 2024年第9期56-60,65,共6页
针对传统消防监控系统存在开发成本高、误警率高、实时监控不便的问题,提出一种基于物联网云平台的智慧消防远程监控系统。采用STM32单片机作为中枢控制芯片,经多传感器采集温度、湿度、烟雾、火焰等环境数据,通过窄带物联网(NB-IoT,Nar... 针对传统消防监控系统存在开发成本高、误警率高、实时监控不便的问题,提出一种基于物联网云平台的智慧消防远程监控系统。采用STM32单片机作为中枢控制芯片,经多传感器采集温度、湿度、烟雾、火焰等环境数据,通过窄带物联网(NB-IoT,Narrow Band Internet of Things)上传至OneNET云平台。经数据分析后以可视化方式呈现,对异常数据触发报警实时响应。通过手机APP实现数据实时监测及一键处置。经测试,监控系统报警准确率高于97.2%,数据延迟低于50 ms,表明该系统能够实现消防火警的无线远程监控,并做出快速反应,满足中小微企业和普通家庭用户的消防监控需要。 展开更多
关键词 智慧消防 窄带物联网 云平台 传感器 远程监控系统
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Dynamic Analysis of a 10 MW Floating Offshore Wind Turbine Considering the Tower and Platform Flexibility
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作者 GAO Shan ZHANG Lixian +3 位作者 SHI Wei WANG Wenhua WANG Bin LI Xin 《Journal of Ocean University of China》 CAS CSCD 2024年第2期358-370,共13页
Recently,semisubmersible floating offshore wind turbine technologies have received considerable attention.For the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered ... Recently,semisubmersible floating offshore wind turbine technologies have received considerable attention.For the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered a rigid model,which could affect the calculation accuracy of the dynamic responses.The dynamic responses of a TripleSpar floating offshore wind turbine equipped with a 10 MW offshore wind turbine are discussed herein.The simulation of a floating offshore wind turbine under regular waves,white noise waves,and combined wind-wave conditions is conducted.The effects of the tower and platform flexibility on the motion and force responses of the TripleSpar semisubmersible floating offshore wind turbine are investigated.The results show that the flexibility of the tower and platform can influence the dynamic responses of a TripleSpar semisubmersible floating offshore wind turbine.Considering the flexibility of the tower and platform,the tower and platform pitch motions markedly increased compared with the fully rigid model.Moreover,the force responses,particularly for tower base loads,are considerably influenced by the flexibility of the tower and platform.Thus,the flexibility of the tower and platform for the coupled simulation of floating offshore wind turbines must be appropriately examined. 展开更多
关键词 floating offshore wind turbine TripleSpar semisubmersible platform rigidity and flexibility platform coupled simulation
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Renewable Biomass as a Platform for Preparing Green Chemistry
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作者 Qiaoguang Li Puyou Jia +1 位作者 Ying Luo Yue Liu 《Journal of Renewable Materials》 EI CAS 2024年第2期325-328,共4页
1 About the Special Issue Editor Qiaoguang Li is an associate professor and master’s supervisor in the Department of College of Chemistry and Chemical Engineering,Zhongkai University of Agriculture and Engineering.He... 1 About the Special Issue Editor Qiaoguang Li is an associate professor and master’s supervisor in the Department of College of Chemistry and Chemical Engineering,Zhongkai University of Agriculture and Engineering.He received his PhD from Institute of Chemical Industry of Forestry Products,Chinese Academy of Forestry in 2018.He has been focusing his research on the chemical basis and application of natural resources.He has published nearly 30 international peer reviewed papers and applied for 10 patents. 展开更多
关键词 BIOMASS platform PATENT
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Dynamic Coupling Analysis of Semisubmersible Platform Float-over Method for Docking Case
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作者 DING Hongyan QIN Licheng +2 位作者 ZHANG Puyang SONG Zhengrong XIE Weiwei 《Journal of Ocean University of China》 CAS CSCD 2024年第2期345-357,共13页
In this paper,the multi-body coupled dynamic characteristics of a semisubmersible platform and an HYSY 229 barge were investigated.First,coupled hydrodynamic analysis of the HYSY 229 barge and the semisubmersible plat... In this paper,the multi-body coupled dynamic characteristics of a semisubmersible platform and an HYSY 229 barge were investigated.First,coupled hydrodynamic analysis of the HYSY 229 barge and the semisubmersible platform was performed.Relevant hydrodynamic parameters were obtained using the retardation function method of three-dimensional frequency-domain potential flow theory.The results of the hydrodynamic analysis were highly consistent with the test findings,verifying the accuracy of the multifloating hydrodynamic coupling analysis,and key hydrodynamic parameters were solved for different water depths and the coupling effect.According to the obtained results,the hydrodynamic influence was the largest in shallow waters when the coupling effect was considered.Furthermore,the coupled motion equation combined with viscous damping,fender system,and mooring system was established,and the hydrodynamics,floating body motion,and dynamic response of the fender system were analyzed.Motion analysis revealed good agreement among the surge,sway,and yaw motions of the two floating bodies.However,when the wave period reached 10 s,the motion of the two floating bodies showed severe shock,and a relative motion was also observed.Therefore,excessive constraints should be added between the two floating bodies during construction to ensure construction safety.The numerical analysis and model test results of the semisubmersible platform and HYSY 229 barge at a water depth of 42 m and sea conditions of 0°,45°,and 90° were in good agreement,and the error was less than 5%.The maximum movement of the HYSY 229 barge reached 2.61 m in the sway direction,whereas that of the semisubmersible platform was 2.11 m.During construction,excessive constraints should be added between the two floating bodies to limit their relative movement and ensure construction safety. 展开更多
关键词 float-over method semisubmersible platform coupling hydrodynamic fender system time-domain analysis
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基于.NET平台的高校竞赛管理系统设计
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作者 杨慧洁 《信息与电脑》 2024年第1期1-3,共3页
高校竞赛管理系统是高校教育教学工作中的重要信息化工具,主要用于组织、监督和评估各类校内校外竞赛。系统通常包括复杂的数据处理、多用户协作和严格的安全性要求。.NET平台因其跨语言互操作性、高效的内存管理、稳健的安全机制等优... 高校竞赛管理系统是高校教育教学工作中的重要信息化工具,主要用于组织、监督和评估各类校内校外竞赛。系统通常包括复杂的数据处理、多用户协作和严格的安全性要求。.NET平台因其跨语言互操作性、高效的内存管理、稳健的安全机制等优势在构建平台性应用程序时展现出极大价值。基于此,文章将分析基于.NET平台的高校竞赛管理系统需求,将其划分为竞赛管理、服务需求和用户权限需求,设计竞赛管理系统的系统架构,实现平台功能、竞赛开启功能、竞赛报名功能、成绩查询功能,旨在为构建高效、稳定且安全的竞赛管理平台提供实践参考。 展开更多
关键词 .net 平台设计 高校 竞赛管理 系统设计
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Experimental Study of Primary School Students’Independent Reading Based on the Network Teaching Platform
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作者 TANG Hui XU Min 《Journalism and Mass Communication》 2023年第2期60-65,共6页
The development of information technology, especially the rise of online teaching platforms, has changed the way people read and the methods they use. Under this influence, primary school students’ independent readin... The development of information technology, especially the rise of online teaching platforms, has changed the way people read and the methods they use. Under this influence, primary school students’ independent reading has also been changed. However, due to limited self-control and understanding, primary school students face certain difficulties when using online teaching platforms for independent reading. Advantages and disadvantages of distance learning based on the network teaching platform were summarized in this paper. A one-year experiment study was carried out on our school fifth-grade students in independent reading using WeChat campus platform considering their current situation and existing problems of independent reading. In experiment study an independent reading mode was introduced. The results show that this reading mode can significantly improve students’ independent reading ability. 展开更多
关键词 Independent reading Primary school student network teaching platform Experimental study
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Research on Construction Scheme of Cloud Platform for Core Network Equipment of Railway 5G Private Network
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作者 LIU Lihai XI Min +1 位作者 DING Jianwen QIAN Jun 《Chinese Railways》 2023年第1期54-61,共8页
This paper studies and analyzes the rigorous requirements of railway 5G private network core network(5GC)equipment based on network function virtualization(NFV)technology in terms of reliability,security,latency and o... This paper studies and analyzes the rigorous requirements of railway 5G private network core network(5GC)equipment based on network function virtualization(NFV)technology in terms of reliability,security,latency and other aspects of communication cloud,compares cloud platform schemes with different decoupling modes,and proposes that railway 5GC should be implemented by software and hardware integration scheme or software and hardware two-layer decoupling scheme.At the same time,the redundancy and disaster recovery schemes and measures that can be taken by 5GC based on cloud platform are proposed.Finally,taking the products of ZTE Corporation as an example,the implementation architecture of railway 5GC cloud platform in 1+1 redundancy mode is given.It serves as a reference for the engineering construction of 5G-R core network. 展开更多
关键词 5GC 5G-R core network equipment DECOUPLING network function virtualization cloud platform
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Research on the Audio Publishing of Classical Books Based on the Theory of Business Model Canvas: Taking Romance of the Three Kingdoms in Digital Audio Platforms as an Example
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作者 Ding Qin Liu Mengzhi 《Contemporary Social Sciences》 2024年第1期58-74,共17页
Visual media have dominated sensory communications for decades,and the resulting“visual hegemony”leads to the call for the“auditory return”in order to achieve a holistic balance in cultural acceptance.Romance of t... Visual media have dominated sensory communications for decades,and the resulting“visual hegemony”leads to the call for the“auditory return”in order to achieve a holistic balance in cultural acceptance.Romance of the Three Kingdoms,a classic literary work in China,has received significant attention and promotion from leading audio platforms.However,the commercialization of digital audio publishing faces unprecedented challenges due to the mismatch between the dissemination of long-form content on digital audio platforms and the current trend of short and fast information reception.Drawing on the Business Model Canvas Theory and taking Romance of the Three Kingdoms as the main focus of analysis,this paper argues that the construction of a business model for the audio publishing of classical books should start from three aspects:the user evaluation of digital audio platforms,the establishment of value propositions based on the“creative transformation and innovative development”principle,and the improvement of the audio publishing infrastructure to ensure the healthy operation and development of the digital audio platforms and consequently improve their current state of development and expand the boundaries of cultural heritage. 展开更多
关键词 Romance of the Three Kingdoms audio publishing Business Model Canvas digital audio platforms
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Transforming Digital Experiences: The Evolution of Digital Experience Platforms (DXPs) from Monoliths to Microservices: A Practical Guide
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作者 Sourabh Sethi Sarah Panda 《Journal of Computer and Communications》 2024年第2期142-155,共14页
The research aims to explore the transition from monolithic Digital Experience Platforms (DXPs) to Microservices-based DXPs, addressing scalability challenges. The study systematically decomposes monolithic structures... The research aims to explore the transition from monolithic Digital Experience Platforms (DXPs) to Microservices-based DXPs, addressing scalability challenges. The study systematically decomposes monolithic structures into Microservices, emphasizing business capability and subdomain decomposition. Concrete insights, challenges, and solutions encountered during this transformation process are presented. The research contributes valuable insights into the challenges and benefits of adopting Microservices in DXPs. Results highlight the importance of architectural patterns and strategic scaling dimensions for improved performance and scalability. The case study on Backbase’s Engagement Banking Platform showcases successful implementation, providing flexibility, integration, and efficient development in the evolving DXP landscape. 展开更多
关键词 Digital Experience platforms (DXPs) Microservices Software Evolution Distributed Systems Architectural Patterns
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Application Effect of Blended Education Strategy Based on the Learning Pass Platform in Phase III Cardiac Rehabilitation of Patients with Coronary Artery Disease
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作者 Shanshan Cui Guihua Xue +4 位作者 Xuelan Yan Hua Zhang Fang Wang Yan Xu Xuefei Li 《Journal of Contemporary Educational Research》 2024年第2期91-97,共7页
Objective:To explore the application effect of the blended education strategy based on the Learning Pass platform in the phase III cardiac rehabilitation of patients with coronary artery disease.Methods:90 patients di... Objective:To explore the application effect of the blended education strategy based on the Learning Pass platform in the phase III cardiac rehabilitation of patients with coronary artery disease.Methods:90 patients diagnosed with coronary artery disease in the Department of Cardiology of our hospital from January 2019 to January 2021 were selected and divided into the control group and the experimental group according to the method of randomized numerical table,with 45 cases in each group.Both the experimental group and the control group received pre-discharge cardiac rehabilitation education by conventional means.The control group received education and supervision information via WeChat after discharge,while the experimental group joined the Learning Pass platform to receive online and offline hybrid education and supervision,with online as the mainstay and offline as a supplement.The disease cognitive level,self-management skills,quality of life,medication adherence,and emotional status of the two groups were compared.Results:The disease cognitive levels in the experimental group were significantly higher than those of the control group(P<0.05);the scores of the experimental group in terms of quality of life,self-management skills,and medication adherence were significantly higher than those of the control group(P<0.05);and the scores of anxiety and depression in the experimental group were significantly lower than those of the control group(P<0.05).Conclusion:The blended education strategy based on the Learning Pass platform has a significant application effect in phase III cardiac rehabilitation of patients with coronary artery disease.It can improve patients’disease cognitive level,self-management skills,and quality of life,and provide a basis for improving patients’prognosis. 展开更多
关键词 Learning Pass platform Blended education Coronary artery disease Cardiac rehabilitation
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面向深度学习Kubernetes负载饱和调度算法设计与实现
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作者 王彬丞 王平辉 +3 位作者 武文博 王壮 王斌 丛鹏宇 《郑州大学学报(理学版)》 CAS 北大核心 2024年第4期21-27,共7页
构建深度学习云平台的基础技术Kubernetes在调度过程中使用负载均衡策略,易产生资源碎片,增加任务等待时间。Kubernetes没有考虑对GPU等外部拓展资源的评分,不能很好适应深度学习云平台的业务场景。针对以上问题提出一种负载饱和调度策... 构建深度学习云平台的基础技术Kubernetes在调度过程中使用负载均衡策略,易产生资源碎片,增加任务等待时间。Kubernetes没有考虑对GPU等外部拓展资源的评分,不能很好适应深度学习云平台的业务场景。针对以上问题提出一种负载饱和调度策略,对Kubernetes调度过程进行改进,减少资源碎片,提高资源利用率。该策略支持对用户指定的外部拓展资源进行评分,能更好适应深度学习云平台业务场景。实验结果表明,负载饱和调度策略能够减少23.40%的任务等待时间,并能将GPU利用率提升14.15%,GPU显存利用率提升6.85%。 展开更多
关键词 深度学习云平台 Kubernetes调度策略 负载饱和调度 GPU调度
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基于PointNet优化网络的铁路站台语义分割
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作者 鲁子明 黄世秀 +2 位作者 季铮 张思仪 黄翔翔 《现代电子技术》 北大核心 2024年第3期68-72,共5页
铁路站台点云语义分割是对铁路侵界现象进行检测的关键环节。文中以新型激光扫描测量系统采集的具有三维空间信息的点云数据为基础,在获取初步分割结果的基础上,设计PointNet网络整体结构提取点云数据全局特征,采用多层次金字塔结构对... 铁路站台点云语义分割是对铁路侵界现象进行检测的关键环节。文中以新型激光扫描测量系统采集的具有三维空间信息的点云数据为基础,在获取初步分割结果的基础上,设计PointNet网络整体结构提取点云数据全局特征,采用多层次金字塔结构对网络进行局部特征提取优化,实现铁路站台点云数据语义分割。研究表明,所提方法对实验点云数据的分割准确率达到84.5%,在铁路工程应用中的点云总体分割精度达到75.34%,在铁路检测中实现了大范围多尺度点云数据的可靠语义分割,满足铁路侵界现象检测分析需求。 展开更多
关键词 点云分割 深度学习 铁路站台 铁路侵界 Pointnet 金字塔结构 深度神经网络 语义分割
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基于One NET云平台的肺结节数据集的设计与实现
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作者 任俊龙 张春茜 +1 位作者 刘华康 栗梦媛 《自动化应用》 2024年第4期170-171,共2页
肺癌的早期表现为肺CT图像中的微小结节,及早发现与治疗对于提高肺癌患者的生存率至关重要。近年来,目标检测技术逐渐被应用于医学图像处理领域,成为肺癌筛查的智能辅助手段。目标检测需要以大量数据为基础进行特征提取,其目标定位的精... 肺癌的早期表现为肺CT图像中的微小结节,及早发现与治疗对于提高肺癌患者的生存率至关重要。近年来,目标检测技术逐渐被应用于医学图像处理领域,成为肺癌筛查的智能辅助手段。目标检测需要以大量数据为基础进行特征提取,其目标定位的精准性受训练数据集的直接影响,但现阶段我国没有可以直接进行目标检测的干净肺结节数据集。为此,该系统分别将预处理后的肺CT图像和目标检测后的肺CT图像上传至云平台实现数据共享,搭建了适用于我国的肺结节检测数据集,为计算机辅助诊断方法的研究提供了数据基础。 展开更多
关键词 肺癌 数据集 Onenet云平台
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基于PLCNET云网关和IOT边缘计算的自动气象站运行监控平台设计
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作者 王霄 谢冬 《气象水文海洋仪器》 2024年第1期126-129,共4页
为了更好地完成自动气象站站点运行监控任务,文章基于支持边缘计算、串口数据透传、MQTT协议的PLCNET云网关,通过IOT云平台进行产品/场景、联网设备、组态设计、定时任务、报警参数等配置,设计了凉山州自动气象站运行监控平台,实现实时... 为了更好地完成自动气象站站点运行监控任务,文章基于支持边缘计算、串口数据透传、MQTT协议的PLCNET云网关,通过IOT云平台进行产品/场景、联网设备、组态设计、定时任务、报警参数等配置,设计了凉山州自动气象站运行监控平台,实现实时监控各站点采集器运行状态、电源电压、RS232/RS485终端通信状态等信息,进一步提升凉山州自动气象站运行监控能力和集约化管理水平。 展开更多
关键词 自动气象站 集约化管理 边缘计算 PLCnet云网关 IOT云平台
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Active Vibration Isolation of Micro-Manufacturing Platform Based on Neural Network 被引量:4
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作者 ZHANG Chun-liang, MEI De-qing, CHEN Zi-chen (Institute of Production Engineering, Zhejiang University, Hangzhou 310027, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期67-68,共2页
The micromation and precision of the Micro-Electromechanical System demand that its manufacturing, measuring and assembling must work in a micro-manufacturing platform with good ability to isolate vibrations. This pap... The micromation and precision of the Micro-Electromechanical System demand that its manufacturing, measuring and assembling must work in a micro-manufacturing platform with good ability to isolate vibrations. This paper develops a vibration isolation system of micro-manufacturing platform. The brains of many kinds of birds can isolate vibrations well, such as woodpecker’s brain. When a woodpecker pecks the wood at the speed as 1.6 times as the velocity of sound, its brain will tolerate the wallop 1 500 times of the weight of itself without any damage. The isolation mechanics and organic texture of woodpecker’s brain that has good isolation characteristics were studied. A structure model of vibration isolation system for the micro-manufacturing platform is established based on the bionics of the bird’s brain vibration isolation mechanism. In order to isolate effectively the high frequency vibrations from the ground, a rubber layer is used to isolate vibrations passively between the micro-manufacturing platform’s pedestal and the ground. This layer corresponds to the cartilage and muscles in the outer meninges of the bird’s brain. The active vibration isolation technique is adopted to isolate vibrations between the micro-manufacturing platform and the pedestal. Air springs are used as elastic components, which correspond to the interspaces between the outer meninges and the encephala of the bird’s brain. Actuators are made of giant magnetostrictive material, and it corresponds to the nerves and neural muscles linking the meninges and the encephala. The actuators and air springs are arranged vertically in parallel to make use of the giant magnetostrictive actuators effectively. The air springs support almost all weight of the micro-manufacturing platform and the giant magnetostrictive actuators support almost no weight. In order to realize high performance to isolate complex micro-vibration, the control method using a three-layer neural network is presented. This vibration control system takes into account the floor disturbance and the direct disturbance acting on the micro-manufacturing platform. The absolute acceleration of the micro-manufacturing platform is used as the performance index of vibration control. The performance of the control system is tested by numerical simulation. Simulation results show that the active vibration isolation system has good isolation performance against the floor disturbance and the direct disturbance acting on the micro-manufacturing platform in all the frequency range. 展开更多
关键词 micro-manufacturing platform active vibration isolation bionic mechanics neural network
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Design of A Bionic Spudcan and Analysis of Penetration and Extraction Performances for Jack-up Platform 被引量:2
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作者 GUO Sheng ZHUANG Hong +3 位作者 TANG Wen-xian WU Wen-le LIU Qin WANG Yue-yang 《China Ocean Engineering》 SCIE EI CSCD 2020年第1期80-88,共9页
The mechanisms of soil structure interaction have drawn much attention in the past years in the installation and operation of jack-up platform. A bionic spudcan produced by biomimetic of egg and snail shell is propose... The mechanisms of soil structure interaction have drawn much attention in the past years in the installation and operation of jack-up platform. A bionic spudcan produced by biomimetic of egg and snail shell is proposed, and the performance of the penetration and extraction are analyzed by numerical method. The geometric contour of egg and snail shell is measured, and its mathematical model is established respectively. According to the structure of existing spudcan of jack-up platform, three kinds of typical biomimetic spudcan are designed. Furthermore, numerical analysis models of biomimetic spudcan are established respectively to study the soil structure interaction mechanism in the process of penetration and extraction, and contrastive analysis of resistance characteristics are carried out. To conclude, the results show that the biomimetic spudcan facilitates the platform installation, and it is also beneficial to the improvement of the bearing capacity of spudcan. 展开更多
关键词 jack-up platform egg shell snail shell bionic design SPUDCAN soil structure interaction
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