试论图书馆2.0的应用模式

通过总结当前图书馆2.0的应用概况,结合图书馆应用web2.0的层次,探讨了图书馆2.0的应用模式和策略.     

等值线和等值面生成算法在精准农业变量施肥中的应用

100083 北京市海淀区学院路丁11号中国矿业大学资源与安全工程学院硕03-1班     

基于USB 2.0 的农田数据采集系统固件程序开发

介绍了基于USB2.0的农田数据采集系统中主控芯片EZ-USB FX2利用可编程控制接口GPIF,与外设进行高速数据传输的基本机制和软配置波形描述符的实现原理;详细阐述了EZ-USB FX2固件程序开发框架;最后,给出了据此进行基于GPIF的固件设计基本方法和实例。     

Soil erosion estimation in conservation tillage systems with poultry litter application using RUSLE 2.0 model

Soil erosion is a major threat to global economic and environmental sustainability. This study evaluated long-term effects of conservation tillage with poultry litter application on soil erosion estimates in cotton (Gossypium hirsutum L.) plots using RUSLE 2.0 computer model. Treatments consisting of no-till, mulch-till, and conventional tillage systems, winter rye (Secale cereale L.) cover cropping and poultry litter, and ammonium nitrate sources of nitrogen were established at the Alabama Agricultural Experiment Station, Belle Mina, AL (34°41′N, 86°52′W), beginning fall 1996. Soil erosion estimates in cotton plots under conventional tillage system with winter rye cover cropping declined by 36% from 8.0 Mg ha⁻¹ year⁻¹ in 1997 to 5.1 Mg ha⁻¹ year⁻¹ in 2004. This result was largely attributed to cumulative effect of surface residue cover which increased by 17%, from 20% in 1997 to 37% in 2004. In conventional tillage without winter rye cover cropping, soil erosion estimates were 11.0 Mg ha⁻¹ year⁻¹ in 1997 and increased to 12.0 Mg ha⁻¹ year⁻¹ in 2004. In no-till system, soil erosion estimates generally remained stable over the study period, averaging 0.5 and 1.3 Mg ha⁻¹ year⁻¹with and without winter rye cover cropping, respectively. This study shows that cover cropping is critical to reduce soil erosion and to increase the sustainability of cotton production in the southeast U.S. Application of N in the form of ammonium nitrate or poultry litter significantly increased cotton canopy cover and surface root biomass, which are desirable attributes for soil erosion reduction in cotton plots.     

Web2.0环境下知识共享的优势、障碍及对策探讨

Web2．0给知识的共享带来了新的契机,本文在Web2．0和知识共享的相关概念基础上,从Web2．0对比Web1．0的知识共享优势入手,分析了Web2．0下知识共享存在的障碍,并进一步提出了相应的对策。     

图书馆2.0环境下OPAC系统新特征探讨

传统图书馆OPAC系统较少从用户角度考虑,导致其界面对读者缺乏吸引力;目前图书馆2．0的出现为OPAC系统的变革带来了契机。从如何让读者通过OPAC获得更丰富体验的角度出发,对图书馆2．0环境下基于Web2．0技术的OPAC系统的若干新特征进行了深入讨论。     

基于ASP.NET 2.0天津农学院青年科技基金项目申报系统的设计与实现

介绍了天农青年基金项目申报系统的总体设计思路,从数据库设计,用户登录模块、申请书合同书填报模块和系统管理模块等方面实现了该系统的运行.该系统可实现用户相关信息管理、项目申请书和项目合同书的在线填报、申请书和合同书的管理等功能,为天农科研项目在线申请提供了一个实用的申报平台,同时也方便项目管理者进行项目管理.     

郁金香灰霉病的研究初报

初步研究结果证明：郁金香灰霉病的病原是郁金香葡萄孢〔Ｂｏｔｒｙｔｉｓｔｕｌｉｐａｒ（Ｌｉｂ．）Ｌｉｎｄ．〕;病菌生长及孢子萌发最适温度为２０℃和２５℃;在相对湿度１００％条件下孢子萌发率最高;菌丝在葡萄糖、蔗糖、麦芽糖、果糖等多种碳源培养基上均能生长,但菌落形态略有差异,其中以ＰＤＡ培养基上的生长最快;该菌一般只危害郁金香,但在室内人工接种条件下,还侵染番茄、黄瓜、西葫芦等。     

高校图书馆2.0服务模式的构建

分析了图书馆2.0的背景和发展现状,从信息资源、网络技术、人力资源和服务平台等方面论述了图书馆2.0服务模式的构成四要素,从服务平台的设计、搜索引擎的功能、学科专业讨论区的设计、RSS功能和用户My library的建立等6个方面探讨了高校图书馆2.0服务模式的构建。