A Case Study on Collaborative Digital Reference System & Analysis on the VRD Collaborative System
合作数字参考咨询系统实例研究&VRD合作体系分析
Vegetation deficiency of sparse pasture was in the middle, with VRD index of -0.18 and that of forest vegetation was the least.
稀疏草原植被亏缺较小，其冗亏指数最小值在-0.18左右；森林植被的冗亏指数接近于0。
The VRD is mainly comprised of E mail, live online reference service in real time, information resources learning center.
图书馆虚拟参考咨询系统主要包括：电子邮件咨询、实时在线咨询、学习资源中心等功能和栏目。
Vrd; voluntary Trust Fund for assistance in mine action;
协助排雷行动自愿信托基金；
The second, the paper have probed into the concept, form, main function and operating mechanism of virtual reference service system, and has introduced VRD and CDRS project in detail.
其次，论文探讨了虚拟参考咨询系统的概念、形式、主要功能、运行机制，并详细介绍了VRD和CDRS项目。
Our construction of VRD is based on the network services of Fudan University Library (FDL), such as FAQs, Readers'Message Board, BBS and so on.
复旦大学图书馆利用网络为读者提供常见问题回答、读者留言板、BBS等多种咨询服务，为虚拟参考咨询系统建设提供有关的研究和服务基础。