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“天地图·榆林”市级节点在线数据集建设 被引量:2
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作者 闫会杰 李英丽 《测绘技术装备》 2012年第4期3-5,共3页
继"天地图"网站开通以后,各地省级节点网站相继实现与主节点的互联互通,市级节点的建设也在蓬勃开展。在节点建设中,数据集建设是非常重要的一环,数据建设内容比较庞杂,依据相关规范、标准和实践,将在线数据集建设进行分类、... 继"天地图"网站开通以后,各地省级节点网站相继实现与主节点的互联互通,市级节点的建设也在蓬勃开展。在节点建设中,数据集建设是非常重要的一环,数据建设内容比较庞杂,依据相关规范、标准和实践,将在线数据集建设进行分类、总结,希望可以为相关建设人员提供帮助。 展开更多
关键词 天地图 市级节点 在线数据集
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基于在线更新的线性混合效应模型的参数估计
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作者 盖玉洁 谢雨娇 王晓迪 《应用概率统计》 CSCD 北大核心 2024年第3期420-432,共13页
本文考虑在线更新数据集下线性混合效应模型的参数估计问题,提出了对应的在线更新估计方法,并证明了所得估计量的相合性.通过数值模拟发现,在不同的参数设置下,该方法的表现良好.将该方法与全局估计进行对比发现,虽然该方法在估计误差... 本文考虑在线更新数据集下线性混合效应模型的参数估计问题,提出了对应的在线更新估计方法,并证明了所得估计量的相合性.通过数值模拟发现,在不同的参数设置下,该方法的表现良好.将该方法与全局估计进行对比发现,虽然该方法在估计误差方面的表现不如全局估计,但是该方法能适用于在线更新数据集的情形,且大大降低了估计量的估计时间,以及估计时对计算机存储性能与计算性能的要求. 展开更多
关键词 在线更新数据 线性混合效应模型 参数估计
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数字抚州地理信息公共平台建设及其应用 被引量:4
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作者 王玲燕 《测绘通报》 CSCD 北大核心 2018年第8期136-141,共6页
数字抚州地理信息公共平台是数字抚州地理空间框架的重要组成部分,平台集成区域内自然、社会、经济、人口与环境等信息,实现区域信息资源整合,为政府部门提供地理信息和决策分析,为单位企业及普通大众提供综合信息服务。本文首先介绍了... 数字抚州地理信息公共平台是数字抚州地理空间框架的重要组成部分,平台集成区域内自然、社会、经济、人口与环境等信息,实现区域信息资源整合,为政府部门提供地理信息和决策分析,为单位企业及普通大众提供综合信息服务。本文首先介绍了数字抚州地理信息公共平台的总体架构,然后详细阐述了平台的主要建设内容,最后基于平台建设成果,开展了多个领域的应用项目,应用效果显著。 展开更多
关键词 平台 服务 云计算 在线数据集 应用
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Perceptions of Instructors and Students to Online Education at a Rural University
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作者 Sevim Kutluturk 《Sino-US English Teaching》 2016年第1期22-28,共7页
The popularity of technology has allowed universities to make changes through their educational system in recent years. Some transitioned from face-to-face instruction to online instruction. The aim of this study is t... The popularity of technology has allowed universities to make changes through their educational system in recent years. Some transitioned from face-to-face instruction to online instruction. The aim of this study is to investigate the perceptions of both the instructors and the students as regards second language acquisition through online education at a rural university. The study was implemented in the context of teaching and learning English as a second language in an online education environment. The course material is based on The Net Languages Learning Platform, which is available at http://ide.yok.gov.tr/, and the course level is general English pre-elementary. Both quantitative and qualitative methods were used in this study. For quantitative data collection, a questionnaire was employed to understand the reasons for low student attendance on online courses. For qualitative research method, observation was carried out, and interviews are designed as data collection techniques. Purposive selection was used for selection of the participants. The findings revealed that online education needs to be modified. The students are eager to improve their second language competencies; however, they do not want to waste their time on an easy course level. 展开更多
关键词 online education online instruction in ESL distance education in ELT online education andface-to-face education
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Research on Online Reviews Impact on Commodity Sales in B2C E-commerce
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作者 Wu Guo-dong 《Review of Global Academics》 2015年第2期553-557,共5页
The objective of this paper was to analyze the impact of online reviews on sales. Based on dual path model of commodity sales, an online reviews impact on the relationship between various factors, and then the theoret... The objective of this paper was to analyze the impact of online reviews on sales. Based on dual path model of commodity sales, an online reviews impact on the relationship between various factors, and then the theoretical hypothesis of each factor has been put forward in the model. As it is intuitive and strongly supported empirically, data including Chinese texts captured from Tmall.com was utilized, and then analyzed by SPSS and ROST CM6. Our empirical study on the reviews of Tmall.com indicated that the hypotheses are verified. 展开更多
关键词 Online Review Commodity Sales B2C E-commerce Influencing Factor STATISTICALANALYSIS
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Platform Construction of Regional Energy Management Center
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作者 胡珏 《China Standardization》 2014年第2期62-67,共6页
Based on the analysis of different requirements of energy management center construction and the data acquisition of various industries in wide area network, as well as the practices of real-lime online system, the pa... Based on the analysis of different requirements of energy management center construction and the data acquisition of various industries in wide area network, as well as the practices of real-lime online system, the paper puts forward the construction scheme of regional energy management center (REMC) which can achieve real time online monitoring of organizations' energy consumption via data collection, and also proposes the design idea of energy data acquisition based on national standards. 展开更多
关键词 regional energy management center real time online monitoring energy efficiency STANDARDIZATION
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