ZZcooller 发表于 2009-2-7 18:50

不错的网站

nobody 发表于 2009-2-7 19:40

能进去的呀

angusyangruo 发表于 2009-2-7 20:33

Requirement 1

Consider the current US, a country of about 300 million people. Estimate from available data the number H of households, with m members each, that in the past were serviced by landlines. Now, suppose that all the landlines are replaced by cell phones; that is, each of the m members of the household has a cell phone. Model the consequences of this change for electricity utilization in the current US, both during the transition and during the steady state. The analysis should take into account the need for charging the batteries of the cell phones, as well as the fact that cell phones do not last as long as landline phones (for example, the cell phones get lost and break).

07214037 发表于 2009-2-7 20:44

用什么关键词搜索啊

2009 发表于 2009-2-7 21:04

在哪里找资料啊

2009 发表于 2009-2-7 21:05

太难找了··········

angusyangruo 发表于 2009-2-7 21:05

Requirement 1

Consider the current US, a country of about 300 million people. Estimate from available data the number H of households, with m members each, that in the past were serviced by landlines. Now, suppose that all the landlines are replaced by cell phones; that is, each of the m members of the household has a cell phone. Model the consequences of this change for electricity utilization in the current US, both during the transition and during the steady state. The analysis should take into account the need for charging the batteries of the cell phones, as well as the fact that cell phones do not last as long as landline phones (for example, the cell phones get lost and break).

ribkah 发表于 2009-2-8 14:44

(*^__^*) 嘻嘻……

aaamath123456 发表于 2009-2-8 15:21

IEEE Xplore Digital Library ??

lxnlxn 发表于 2009-2-8 15:51

网站很好,不会用啊就是,很好,呵呵
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