林业经济信息集成平台的构建

本文通过介绍基于J2EE技术框架的林业经济信息系统的构建,指出了为林业经济信息的集成与共享提供一个基础平台的重要作用与意义,以及其构建的方法与步骤。     

简述遥感资源卫星系统及其应用

遥感资源卫星系统是一种高精度的获取各种地理信息的测量工具，它广泛适用于森林调查，大地测绘，土地资源详查、城市规划等领域，本文较详细地介绍了遥感资源卫星系统的组成及具体的应用情况。     

应用MapGIS实现属性数据连接方法初探

利用森林资源二类调查获得的资料建立空间数据库与属性数据库，探索实现空间数据库与属性数据库有机结合的方法。     

林业地理信息系统空间数据质量及误差初探

空间数据质量控制是建立林业地理信息系统的重要环节 ,文中着重对林业地理信息系统空间数据质量误差的来源与空间数据质量控制的方法、措施进行了初步探讨     

DEA模型评价物流企业综合效率的应用分析

采用C2 R模型和C2 GS2 模型对8家物流企业的综合效率进行了评价。结果表明:8家物流企业的规模收益基本上是较差的,只有2家企业达到规模经济,5家企业的技术有效。分析结果比较符合实际,不仅为企业找出了存在的问题,而且还指明了调整的力度,有助于物流企业提高自身管理水平,增强竞争实力。     

The Chagga homegardens: a multistoried agroforestry cropping system on Mt. Kilimanjaro (Northern Tanzania)

The homegardens are characterised by an intensive integration of numerous multipurpose trees and shrubs with food crops and animals, simultaneously on the same unit of land.The Chagga are skilled farmers with an intimate knowledge of the crops and their ecological requirements. They have a good idea of functions/uses of the plant species on their farms. The large species diversity provides both subsistence and cash crops. It enables the farmer to keep his management options open and provides insurance against drought, pest and economic risks.     

Concept and feasibility study for the integrated evaluation of environmental monitoring data in forests

In the 1970s unexpected forest damages, called “new type of forest damage” or “forest decline”, were observed in Germany and other European countries. The Federal Republic of Germany and the German Federal States implemented a forest monitoring system in the early 1980s, in order to monitor and assess the forest condition. Due to the growing public awareness of possible adverse effects of air pollution on forests, in 1985 the ICP Forests was launched under the convention on long-range transboundary air pollution (CLRTAP) of the United Nations Economic Commission for Europe (UN-ECE). The German experience in forest monitoring was a base for the implementation of the European monitoring system. In 2001 the interdisciplinary case study “concept and feasibility study for the integrated evaluation of environmental monitoring data in forests”, funded by the German Federal Ministry of Education and Research, concentrated on in-depths evaluations of the German data of forest monitoring. The objectives of the study were: (a) a reliable assessment of the vitality and functioning of forest ecosystems, (b) the identification and quantification of factors influencing forest vitality, and (c) the clarification of cause-effect-relationships leading to leaf/needle loss. For these purposes additional data from external sources were acquired: climate and deposition, for selected level I plots tree growth data, as well as data on groundwater quality. The results show that in particular time series analysis (crown condition, tree growth, and tree ring analysis), in combination with climate and deposition are valuable and informative, as well as integrated evaluation of soil, tree nutrition and crown condition data. Methods to combine information from the extensive and the intensive monitoring, and to transfer process information to the large scale should be elaborated in future.

基于物联网的国家兽药追溯系统的建设与应用

介绍了基于物联网的国家兽药追溯系统的内容和建设历程,概述了国家兽药追溯系统的试点应用和全面应用的情况以及特点和成效,分析了国家兽药追溯系统的制约因素和对策,并对国家兽药追溯系统的数据应用前景予以展望,以期为"互联网+兽药"的实现和兽药行业大数据的应用奠定扎实的基础。     

Detection of monoclonal integration of bovine leukemia virus proviral DNA as a malignant marker in two enzootic bovine leukosis cases with difficult clinical diagnosis

Monoclonal integration of bovine leukemia virus (BLV) proviral DNA into bovine genomes was detected in peripheral blood from two clinical cases of enzootic bovine leukosis (EBL) without enlargement of superficial lymph nodes. A BLV-specific probe hybridized with 1 to 3 EcoRI and HindIII fragments in these 2 atypical EBL cattle by Southern blotting and hybridization, as well as in 3 typical EBL cattle. The probe also hybridized to a large number of EcoRI and HindIII fragments in 5 cattle with persistent leukosis. These results suggest that the detection of monoclonal integration of BLV provirus into the host genome may serve as a marker of monoclonal proliferation and malignancy in difficult to diagnose EBL cattle.