In this paper we propose a parameterisedcooperation utilitythat can be used to study the tradeoff between the benefit that an overlay obtains from the ISPs that carry its traffic and the costs that it imposes on them. With this utility, we find a closed-form expression for the optimal resourc...
Of the nearly 300 species of the phylum Glomeromycota comprising arbuscular mycorrhizal fungi (AMF), only 24 were originally described to form glomoid spores in unorganized sporocarps with a peridium and a gleba, in which the spores are distributed randomly. However, the natural (molecular) phy...
不仅如此,随着春节前后第五架C919交付东航后,上海虹桥—... 网易 深度|国产大飞机:翱翔在更广阔的蓝天 5天前 中国民航大学经济研究所所长李晓津提出,东航的主基地是在上海,因此现在C919主要运行的是从上海始发到达的航线,比如上海到北京、上海到成都、上海到广州等。以北京和广州为中心的其他区域也...