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电子邮件是远洋运输业务往来的重要载体,研究如何高效地从询盘邮件中挖掘关键实体信息具有重要意义。本文提出一种基于BERT的远洋运输询盘命名实体识别方法,采用监督学习的方式,利用BERT预训练语言模型进行邮件文本信息的特征提取。实验结果表明,该方法能够有效解决远洋运输询盘邮件的信息抽取问题,实体识别的整体效果较好。 相似文献
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针对舰船雷达信号目标的识别方式简单、识别度低的情况,文中提出基于 Web语义的舰船雷达回波自动识别系统。因为雷达信号目标特征信息点分散且繁杂,在语义 Web网下取得雷达信号目标图像的数据特征,运用改进 FastICA算法提取特征数据后,通过智能雷达回波视频图像识别系统,对舰船目标图像进行分析。实验证明,基于 Web语义的舰船雷达目标识别系统,能使大量信息被系统充分利用,达到精确识别舰船雷达图像目标的目的。 相似文献
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随着Internet的日益普及,利用ASP进行Web数据库的编程和应用已经成为一种趋势。用ASP技术实现将数据库中的信息在Internet上发布的方法有其独特的优点,国内已有许多Web站点采用了该项技术。文章利用ASP进行Web数据库的编程,对电话用户维护管理系统进行设计,为通信维护人员有效地提供故障用户通信路由的各项资料,确保及时了解故障信息并快速有效的排除故障。 相似文献
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Rosaline Canessa Michael Butler Claudette Leblanc Christian Stewart Don Howes 《Coastal management》2013,41(1):105-142
Access to current, comprehensive, and reliable spatial information is necessary for informed decision making in integrated coastal and ocean management. This need is being met through development of a marine spatial information infrastructure that encompasses both technological and institutional responses. This article traces Canada's experience in developing a marine spatial information infrastructure over the last 30 years starting with the compilation of coastal atlases, through the development of geographic information systems, to remote data acquisition instruments and Web mapping portals. Because of the plethora of initiatives, it has been essential to be selected and limit the number and choice of examples. The institutional response has lagged behind that of technological innovation and hinges on understanding users’ needs and decision support drivers, sustainability of institutional and individual champions, and, above all, cooperation and collaboration among the broad community of practice. 相似文献
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基于WEB-ECDIS的航标信息发布系统 总被引:1,自引:1,他引:0
随着现代信息技术、计算机网络技术的发展,在海上交通运输领域,为解决各涉海部门之间的信息孤岛问题,应用互联网实现海上交通信息发布与共享将是一有效的技术途经。本文利用成熟的网络地理信息技术和GeoBeans5.5工具软件,建立了基于WEB-ECDIS的航标信息发布系统,它是在Internet或Intranet网络环境下的一种兼容、存储、处理、分析和显示与应用航标实时空间信息的WEBGIS系统。用户可以在互联网上借助通用的网络浏览器,浏览、查询和获取基于电子海图空间数据与动态航标属性数据。本文从技术的角度,对系统做了简要的介绍。 相似文献
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阐述了电子口岸的基本概念。介绍了于Web Services的架构及其实现的核心技术和基于Web Services的电子口岸框架。提出了基于Web Services的电子口岸体系结构,可以整合口岸环境中各实体的异构系统,使之协同工作,解决口岸实体间信息孤岛问题。 相似文献
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Organically complexed and total dissolved copper and nickel were measured in the Thermaikos Gulf waters during winter 1998. Total concentrations ranged from 1.13 nmol/L to 7.02 nmol/L for copper and from 3.04 nmol/L to 9.50 nmol/L for nickel. The C18 Sep-Pak solid phase extraction technique was used in order to determine the amount of copper and nickel complexed with the hydrophobic component of the dissolved organic matter (DOM). Up to 32.4% of total copper and 4.57% of total nickel were complexed with the DOM extracted by C18. By applying HPLC analysis it was shown that the majority of the organic compounds retained by C18 had intermediate to low polarity. Using the absorbance ratio a254/a436 it was possible to unravel that humic substances of both terrestrial and marine origin were present in the Thermaikos Gulf and their distribution followed the dilution of riverine waters. Moreover our results indicated that organic binding of both Cu and Ni was stronger with the hydrophobic compounds of terrestrial origin than with those of marine origin. 相似文献
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特征提取是人脸识别中一个关键步骤。传统的Fisherface人脸识别方法中用样本的类均值和总体均值定义相应的散布矩阵,丢失了样本个体之间的结构信息,本文提出了一种基于原始样本个体结构信息的结构化Fisherface人脸识别方法,最后得到的特征数据中保留了原始样本更多的分布信息。在ORL人脸数据库的实验结果验证了该方法的有效性。 相似文献