期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
数字图书馆动态组合学科服务模式研究 被引量:4
1
作者 董颖 孟德泉 +1 位作者 方敏 张琳 《大学图书馆学报》 CSSCI 北大核心 2015年第4期85-89,共5页
基于国内数字图书馆学科服务现状及国内外知识服务方法与技术发展情况,分析现有学科服务模式、系统化学习知识服务理论与相关技术,探索一种基于相关知识服务技术及其动态组合的新型学科服务模式,剖析该模式下数据的动态性和技术的组合... 基于国内数字图书馆学科服务现状及国内外知识服务方法与技术发展情况,分析现有学科服务模式、系统化学习知识服务理论与相关技术,探索一种基于相关知识服务技术及其动态组合的新型学科服务模式,剖析该模式下数据的动态性和技术的组合性特征,并根据用户层次和知识需求层次的划分,来提供知识服务。 展开更多
关键词 动态组合 数字图书馆 学科服务
下载PDF
利用数据库实现图书馆FTP账号的在线申请 被引量:1
2
作者 陈春阳 王庭熙 《现代情报》 北大核心 2005年第4期113-115,共3页
本文从FTP站点功能、作用及其特点入手,阐述了FTP站点在图书馆的安装、数据库配置及注意的主要问题,通过网页编程语言对数据库进行操作及构建。
关键词 FIP站点 图书馆 ServU FTP SERVER 数据库
下载PDF
校园网络存储系统设计 被引量:1
3
作者 唐伟 《科技信息》 2011年第19期86-87,共2页
本文以校园网用户移动办公、教学资源管理对网络存储需求为实例,所开发网络存储管理系统将用户在网络上分布的、异构的存储服务器有机地组织起来,为用户提供一片可扩展、完整、大容量的虚拟存储空间。校园网络用户通过任意一台局域网上... 本文以校园网用户移动办公、教学资源管理对网络存储需求为实例,所开发网络存储管理系统将用户在网络上分布的、异构的存储服务器有机地组织起来,为用户提供一片可扩展、完整、大容量的虚拟存储空间。校园网络用户通过任意一台局域网上的计算机,都可以访问到虚拟存储空间,存取数据。在外工作的用户也可以通过Internet使用FTP进行访问虚拟存储空间。本文主要介绍了该系统的设计思想和结构模型。 展开更多
关键词 虚拟存储空间 网络存储 ServU ISCSI
下载PDF
国电吉林热电厂Web服务器的搭建
4
作者 鲁岚巍 《热电技术》 2017年第2期42-43,共2页
国电吉林热电厂Web服务器正在运行当中。该服务器采用windows server 2003操作系统和4.0框架,其搭建包括IIS的安装及配置,servU的安装及配置,数据库sql2008的创建及链接,数据库Access的安装,vf5.0的安装,该服务器的搭建主要解决厂内的... 国电吉林热电厂Web服务器正在运行当中。该服务器采用windows server 2003操作系统和4.0框架,其搭建包括IIS的安装及配置,servU的安装及配置,数据库sql2008的创建及链接,数据库Access的安装,vf5.0的安装,该服务器的搭建主要解决厂内的信息获取。 展开更多
关键词 IIS servU sql2008 ACCESS
下载PDF
Monitoring of brown stink bug (Hemiptera: Pentatomidae) population dynamics in corn to predict its abundanee using weather data
5
作者 Xinzhi Ni Ted E. Cottrell +3 位作者 G. David Buntin Xianchun Li Wei Wang Hong Zhuang 《Insect Science》 SCIE CAS CSCD 2019年第3期536-544,共9页
The brown stink bug (BSB), Euschistus servus (Say)(Hemiptera: Pentatomidae), is a serious economic pest of corn production in the southeastern United States. The BSB population dynamics was mon itored for 17 weeks fro... The brown stink bug (BSB), Euschistus servus (Say)(Hemiptera: Pentatomidae), is a serious economic pest of corn production in the southeastern United States. The BSB population dynamics was mon itored for 17 weeks from tasseling to preharvest of corn plants (i.e., late May to mid-September) using pheromone traps in three corn fields from 2005 to 2009. The trap data showed two peaks in early June and mid-August, respectively. The relationship between trap catch and pregrowing season weather data was examined using correlation and stepwise multiple factor regression analyses. Weather indices used for the analyses were accumulated growing degree day (AGDD), number of days with minimum temperature below 0℃(Subz), accumulated daily maximum (AMaxT) and minimum temperatures (AMinT) and rainfall (ARain). The weather indices were calculated with lower (10℃) and upper (35℃) as biological thresholds. The parameters used in regression analysis were seasonal abundance (or overall mean of BSB adult catch)(BSBm), number of BSB adults caught at a peak (PeakBSB), and peak week (Peakwk). The BSBm was negatively related to high temperature (AmaxT or AGDD) consistently, whereas IstPeakBSB was positively correlated to both ARain and Subz, irrespective of weather data durations (the first 4, 4.5, and 5 months). In contrast, the 7-month weather data (AGDD7) were negatively correlated to the BSBm only, but not correlated to the second PeakBSB. The 5-year monitoring study demonstrated that weather data can be used to predict the BSB abundance at its first peak in tasseling corn fields in the southeastern U.S. states. 展开更多
关键词 Euschistus servus first TRAP CATCH peak PHEROMONE TRAP CATCH population dynamics stepwise regression modeling WEEKLY mean
原文传递
Influence of brown stink bug feeding, planting date and sampling time on common smut infection of maize
6
作者 Xinzhi Ni Michael D. Toews +5 位作者 G. David Buntin James E. Carpenter Alisa Huffaker Eric A. Schmelz Ted E. Cottrell Zaid Abdo 《Insect Science》 SCIE CAS CSCD 2014年第5期564-571,共8页
Phytopathogen infections are frequently influenced by both biotic and abiotic factors in a crop field. The effect of brown stink bug, Euschistus servus (Hemiptera: Pentatomidae), feeding and planting date and sampl... Phytopathogen infections are frequently influenced by both biotic and abiotic factors in a crop field. The effect of brown stink bug, Euschistus servus (Hemiptera: Pentatomidae), feeding and planting date and sampling time on common smut (Ustilago maydis) infection percentage of maize plants was examined in 2005 and 2006, and 2010 and 2011, respectively. Brown stink bug adult feeding on maize hybrid "DKC6971" at flowering in 2005 and 2006 did not influence smut infection percentage when examined using 3 treatments (i.e., 0 adult, 5 adults, and 5 adults mixed with the smut spores). The smut infection percentages were 〈 3% (n =12) in the 3 treatments. The smut infection percentage among the 4 weekly samplings was the same, so was natural aflatoxin contamination at harvest among the treatments. The 2nd experiment showed that planting date did not affect the smut infection percentage in either 2010 or 2011. But, the smut infection percentage from the postflowering sampling was greater than preflowering sampling in both years. The smut infection percentage varied among the germplasm lines in 2010, but not in 2011. This study demonstrated that brown stink bug feeding at flowering had no effect on smut infection in maize, and the best time for smut evaluation would be after flowering. The temperature and precipitation might have also influenced the percentage of smut-infected maize plants during the 4 years when the experiments were conducted. The similarity between kernel-colonizing U. maydis and Aspergillus flavus infections and genotype × environment interaction were also discussed. 展开更多
关键词 common smut Euschistus servus planting date Ustilago maydis
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部