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提出了一种适用于无线网络的基于多拒绝自动请求重传(ARQ)算法的拥塞控制方法。谊方法结合随机早探洲(RED)算法,通过ARQ发送窗口和分割队列长度以及重传率进行拥塞控制。仿真表明,这种方法能预测链路拥塞,反馈链路拥塞程度,提高链路吞吐率。 相似文献
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《Journal of Forest Economics》2014,20(1):1-16
This meta-analysis aims to identify the key factors governing the economic costs of avoided deforestation in developing countries. To this end, data were collected from 32 primary studies published between 1995 and 2012, yielding 277 observations. Results show that unit costs depend significantly on cost features like estimation methodology, inclusion or exclusion of cost components, carbon accounting method, area size, alternative land uses and beneficiaries, time horizon, and the continent in which the forest protection scheme is implemented, but also factors like the share of agriculture in a nation's economy play a significant role in explaining unit costs. In future studies, greater attention needs to be paid to additional cost components like transaction costs and the presence of the co-benefits of avoided deforestation. 相似文献
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N.g. Meyer M. Breitenbach R.d. Kekana 《The South African journal of economics. Suid-afrikaanse tydskrif vir ekonomie》2008,76(4):652-666
This paper investigates two alternative roads running parallel to one another; one being a double‐carriageway national road that was tolled 4 years ago and the other being an inter‐city single‐carriageway road. The purpose of the paper is to test the application of the World Bank‐developed Road Economic Decision (RED) model for assessing the economic impact of traffic diversion between two existing alternative roads. In order to do so, the RED model is first used to conduct a cost–benefit analysis of each road in isolation. Thereafter, the model is used to do a scenario analysis followed by a sensitivity analysis. The results show that the RED model is a useful tool for evaluating the impact on society of diverted traffic between alternative roads elsewhere in South Africa. 相似文献
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