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ZZcooller

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21^#

发表于 2009-2-7 18:50 |只看该作者

|招呼Ta 关注Ta

不错的网站

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nobody

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网络挑战赛参赛者

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发表于 2009-2-7 19:40 |只看该作者 |招呼Ta 关注Ta

能进去的呀

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angusyangruo

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发表于 2009-2-7 20:33 |只看该作者 |招呼Ta 关注Ta

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).

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07214037

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24^#

发表于 2009-2-7 20:44 |只看该作者 |招呼Ta 关注Ta

用什么关键词搜索啊

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2009

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发表于 2009-2-7 21:04 |只看该作者 |招呼Ta 关注Ta

在哪里找资料啊

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2009

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发表于 2009-2-7 21:05 |只看该作者 |招呼Ta 关注Ta

太难找了··········

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angusyangruo

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27^#

发表于 2009-2-7 21:05 |只看该作者 |招呼Ta 关注Ta

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).