基于图的非边际技术驱动项目总碳足迹评估--以OTT/IPTV为例
A Graph-based Perspective to Total Carbon Footprint Assessment of Non-marginal Technology-driven Projects - Use case of OTT/IPTV
摘要:
绿色和可持续项目的生存周期评估(LCA)已被发现是一个必要的分析,以包括所有的上游,下游和间接影响。由于相互作用的复杂性,相对于基线的不同影响,即,一个一切照旧(BAU)的情况下,通常被认为是相对比较各种项目。然而,随着项目在基线中的渗透程度增加,流行的边际假设不再成立,差异影响可能变得不一致。虽然已经成功地提出了各种神话,并用于遏制这种副作用,自下而上的性质,从项目本身开始评估,并最终扩大范围,很容易无法承认对基线的关键修改。这一点与信通技术的颠覆性和动态技术密切相关,因为这些技术使基线成为一种边缘性的遗产。在这项工作中,提出了一种分析的形式主义,提供了一种比较这些技术和项目的手段。所提出的方法背后的核心思想是一个幅度不敏感的基于图形的距离函数,以区别比较项目与基线。所提出的方法的适用性,然后在OTT/IPTV在线媒体分发服务的用例进行评估。
英文摘要:
Life Cycle Assessment (LCA) of green and sustainable projects has been found to be a necessary analysis in order to include all upstream, downstream, and indirect impacts. Because of the complexity of interactions, the differential impacts with respect to a baseline, i.e., a business-as-usual (BAU) scenario, are commonly considered to relatively compare various projects. However, as the degree of penetration of a project in the baseline increases, the popular marginal assumption does no longer hold, and the differential impacts may become inconsistent. Although various mythologies have been successfully proposed and used to contain such a side effect, the bottom-up nature, which initiates the assessment from the project itself and ultimately widens the scope, could easily fail to acknowledge critical modifications to the baseline. This is highly relevant in terms of ICT's disruptive and dynamic technologies which push the baseline to become a marginal legacy. In this work, an analytic formalism is presented to provide a means of comparison of such technologies and projects. The core idea behind the proposed methodology is a magnitude-insensitive graph-based distance function to differentially compare a project with a baseline. The applicability of the proposed methodology is then evaluated in a use case of OTT/IPTV online media distribution services.
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