铁路计算机基层网拓扑结构的设计与实现

通过对铁路计算机基层网拓扑结构的分析,根据基层网规划和建设原则,提出采用串联环路和汇接星型网络拓扑结构相结合模式的基层网技术方案。在确定基层网拓扑结构、主要设备配置和安全策略的基础上,结合北京铁路局京广线的实际,论述了方案的技术性、可靠性和经济效益。     

A multiple perspectives view of the market case for green energy

This paper presents an exploratory evaluation of the market case for green energy. These energy sources are widely considered to have less of an ecological impact than conventional energy sources. The case for green energy is viewed from the multiple perspectives TOP (technical, organizational, personal) framework. The green energy technologies will need to meet certain technical, organizational and personal criteria and resolve key issues in order to address the barriers to market adoption. The multiple perspectives approach facilitates the evaluation of green-energy alternatives as potential new products which would enable organizations and individuals to meet both economic and green criteria that impact customer value creation. Given the present trends of increasing energy use and requirements to minimize environmental impact, green energy adoption may become a key element of strategies to ensure long-term economic growth.