泰安市农业科技推广调查与思 考简

我国农业和农村经济已经进入一个新的发展阶段,而农业科技推广是农业科技成果转化为现实生产力的桥梁和纽带,是农业科技发展的主要组成部分,是增强农业后劲、繁荣农村经济、实现“农民增收,农村稳定”的重要保证,当前我国农技推广体系建设和农技推广工作还存在着许多不可忽视的问题。2012年中央1号文件突出强调了农业科技创新与推广,这在我国农业科技发展史上具有里程碑意义。在对山东省泰安市农业技术推广的实践进行深入调研基础上,着重对农业科技推广制约因素和对策建议进行探讨研究。     

The economic benefits and costs of trees in urban forest stewardship: A systematic review

Understanding the benefits provided by urban trees is important to justify investment and improve stewardship. Many studies have attempted to quantify the benefits of trees in monetary terms, though fewer have quantified the associated costs of planting and maintaining them. This systematic review examines the methods used to jointly analyse the costs and benefits of trees in the urban landscape, assesses the relative balance of benefits and costs, and attempts to understand the wide variation in economic values assigned in different studies. The benefits most frequently studied are those related to environmental regulation and property values, and the available data show that these usually outweigh the costs. Aesthetic, amenity, and shading benefits have also been shown to provide significant economic benefits, while benefits in terms of water regulation, carbon reduction and air quality are usually more modest. Variation in benefits and costs among studies is attributed largely to differences in the species composition and age structure of urban tree populations, though methodological differences also play a role. Comparison between studies is made difficult owing to differences in spatiotemporal scope, and in the way urban forest composition and demographic structure were reported. The overwhelming majority of studies concern deciduous trees in Northern America, and much less is known about urban forests in other regions, especially in the tropics. Future work should thus seek to fill these knowledge gaps, and standardise research protocols across cities. In light of ambitious goals in many cities to increase tree cover, ongoing advances in valuation methods need to provide a more comprehensive accounting of benefits and costs, and to better integrate economic assessment into the decision-making process.     

网络环境下高校图书馆信息服务的思考

随着网络信息技术的进一步发展,图书馆传统的信息服务模式已不适应网络环境的发展需要。本文对网络环境下信息服务的特点进行了分析,提出了拓展高校图书馆信息服务的有效措施,以及如何加强信息服务人员素质的培养。     

再论图书馆对读者人文关怀的实现

现代网络信息技术的发展并不能影响“人文价值”在图书馆的核心价值地位。图书馆人文价值的重要内容是人文关怀,而其中对读者的人文关怀尤其重要。从满足读者的知识需求和关注读者的心理感受2个层面来论述图书馆对读者人文关怀的实现。     

基于Web的农业支持系统研究

在分析了研究背景的基础上,提出了构建基于Web的农业支持系统的设想。结合已有的研究成果,对基于Web的农业支持系统进行了深入阐述,设计了该系统的开发框架,并对开发过程中的一些重要问题进行了探讨。     

Service Life Prediction of Concrete Structures under Chloride Environment

The problems rendered from the conventional time marching, referring to stepwise time marching scheme (STMS) adopted in boundary element method (BEM) for chloride diffusion in concrete structures, were investigated, and a new time marching, referring to initial time marching scheme (ITMS) in BEM, was developed for evaluation of service life of the concrete structures under chloride environment. Results of the numerical examples show that the ITMS-BEM proposed can eliminate domain integral and simplify the computational model, so that the stability in iteration process can be improved, resulting in better efficiency and accuracy, compared with the STMS-BEM. It can also be concluded that the dimensions of the diffusion of chloride can affect the service life of the concrete structure significantly, which should be taken into account in structural design.     

农业高校图书馆数字资源建设——以仲恺农业工程学院图书馆为例

通过对所在图书馆的数字资源建设现状及存在问题的阐述,提出了未来图书馆进行数字资源建设需要优化馆藏结构、加大资金投入;重视数据库的选择、试用与推广;加强特色的数字化资源建设;重视网络信息资源的收集整理;整合馆藏数字资源以及强化人力资源开发。     

达里诺尔湖湿地生态系统服务价值评价

生态系统服务功能是生态系统与生态过程所形成及所维持的人类赖以生存的自然环境条件与效用,对其服务价值进行货币化评价,可以推动自然资源可持续利用,促进区域生态环境保护。以达里诺尔湖湿地为研究对象,结合达里诺尔湖湿地生态系统的结构、特征及其生态过程特点,通过资料搜集与实地调研,运用资源经济学理论和方法,对达里诺尔湖湿地生态系统服务价值进行了划分。构建了达里诺尔湖湿地生态系统服务价值评价指标体系,并对其进行了价值评价。评价结果显示达里诺尔湖湿地的服务价值为93.70×10⁴万元,其中直接使用价值为2.19×10⁴万元,占比为2.36%,间接使用价值为91.51×10⁴万元,占比为97.66%。各项生态系统服务功能中以调节空气湿度价值最大,为82.76×10⁴万元,占总服务价值的88.32%。     

高校图书馆“走进院系”模式的理论总结

简要解释了高校图书馆“走进院系”的涵义,详细论述了其服务项目以及由服务项目的增减所产生的不同模式,并对其实践的适用性进行了总结。     

面向教学科研的高校图书馆工作琐谈

为教学科研提供良好服务是高校图书馆工作的根本目标,要实现该目标就必须清醒地认识高校图书馆的发展趋势并着重做好3方面工作,即信息资源建设工作、图书馆服务工作和图书馆管理工作。