美国属权贸易核算的缘起和框架

 本文回顾20世纪90年代初美国属权贸易核算的肇始,用系列公式诠释NAS、Julius和BEA三家所提出的核算框架,并对后来有长足发展的BEA框架进行图形展示。此外还分析美国属权贸易核算的数据支持背景,以期对改进和完善中国的经济贸易统计有所裨益。     

NAS在电信网中的应用

网络接入服务器(NAS)位于公共电话网PSTN或综合业务数字网ISDN与Internet之间,为远程用户提供Internet接入能力,多链路捆绑、回呼等,并根据当前电信网现状,结合设备特点为电信运营商、ISP等提供了优选的设备组网方案.     

The NAS Risk Paradigm as a Medium for Communication

Many journalists, public interest groups and other recipients of risk assessment information are familiar with the National Academy of Sciences risk assessment paradigm. From time to time, paradigm concepts appear in news features or community group discussions on environmental issues. With knowledge of the paradigm common to scientists, journalists, and other interested parties, the paradigm is a potentially important medium for communication between risk scientists, journalists, and the public. Specifically, the paradigm offers widely-accepted organizing principles for presenting risk information, a common language for addressing a variety of issues and concepts, and a flexible analytical system that accommodates the diversity of scientific information and policy perspectives that characterize the risk assessment process. In addition, the paradigm outlines important relationships and distinctions between risk assessment and risk management. Informed and creative use of these features of the paradigm can guide and simplify interviews between journalists or community groups and their expert sources, clarify presentation of risk information, and promote collaboration between risk scientists, journalists, and others to assure complete, objective and fair comment on risk issues of interest to the public.     

高校数字图书馆网络存储技术的比较与选择

针对目前应用于高校数字图书馆中网络存储技术系统的DAS、SAN和NAS三种模式,利用图示的方法介绍了三种系统的涵义。三种系统各有优缺点和局限性,在实际应用中应予以注意。通过比较分析,得出了SAN是存储技术的发展方向也是数字图书馆存储发展趋势的结论。