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).作者: 07214037 时间: 2009-2-7 20:44
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太难找了··········作者: angusyangruo 时间: 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).作者: ribkah 时间: 2009-2-8 14:44
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IEEE Xplore Digital Library ？？作者: lxnlxn 时间: 2009-2-8 15:51
网站很好，不会用啊就是，很好，呵呵作者: 快乐学子 时间: 2009-2-8 16:01
谢谢lz，进去了，很幸运，呵呵