好东西，好好看看，~~哈哈，~~~~
我自己花了20置顶了！！我自己花了20置顶了！！
顶！！！这个很不错我晕，到底多长才行啊
没钱..先收藏下来，这几天再来看看
好东西，我顶一个了！！！！！！！！！！！！！！！
很牛，很强大。谢谢分享，虽然损失了不少体力
谢谢楼主~~~·~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Abstract
The ongoing cell phone revolution warrants an examination of its energy impacts – past,
present, and future. Thus, our model adheres to two requirements: it can evaluate energy
use since 1990; and it is flexible enough to predict future energy needs.
Mathematically speaking, our model treats households as state machines and uses actual
demographic data to guide state transitions. We produce national projections by simu-
lating multiple households. Our bottom-up approach remains flexible, allowing us to: 1)
model energy consumption for the current United States, 2) determine efficient phone
adoption schemes in emerging nations, 3) assess the impact of wasteful practices, and 4)
predict future energy needs.
We show that the exclusive adoption of landlines by an emerging nation would be more
than twice as efficient as the exclusive adoption of cell phones. However, we also show
that the elemination of certain wasteful practices can make cell phone adoption 175% more
efficient at the national level. Furthermore, we give two forecasts of the current United
States, revealing that a collaboration between cell phone users and manufacturers can
result in savings of more than 3.9 billion Barrels of Oil Equivalent over the next 50 years.
下不下来呀，扣了分，还不给我……………………太气人了…………
顶！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！