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标题: 推荐优秀论文 [打印本页]

作者: shiwei6893 时间: 2009-5-9 08:46
标题: 推荐优秀论文
感觉自己写的比较认真，作品比较好的同学把队号说一下！好让大家有点选择。相信大家对自己的论文了解比较到位。这样也好让大家讨论！

作者: xiaoks518 时间: 2009-5-9 15:50

感觉自己写的比较认真，作品比较好的同学把队号说一下！好让大家有点选择。相信大家对自己的论文了解比较到位。这样也好让大家讨论！/ Q, Y q( r) F( ~6 z x" b! j. `
shiwei6893 发表于 2009-5-9 08:46

1090#
以下是本队的中文和英文摘要，恳请大家指正...

作者: 小莎 时间: 2009-5-10 02:53
好强！
2# xiaoks518

作者: hzlgy 时间: 2009-5-10 09:56
1337
                                                           Abstract
In this paper, quantitatively analyses the four factors, namely, population, food, freshwater resources and energy. We use trend forecasting method, and therefore work out the predicted value by 2030. This article mainly bases on the data of World Bank, FAO and other authoritative datas. We work out the model using linear regression and nonlinear regression using Spss,and then,test the the correctness and feasibility of the model and parameters by t-test, f-test, as well as residual maps.
This article establishes a population model, a world energy consumption model, a food production index model, a average thermal energy per person per day model, a food supply model, a population and freshwater resources model. The first four model is based on time series analysis .And the food supply model is based on the first two and the forth one , while the sixth one is on the basic of the first one and the worldwide water consumption. In the sixth one, we can predict every value of the year given, so with the Swedish hydrologist Malin Falkenmark's “Water-Stress index",we could  determine the state of the world: water rich, water stress, water shortage, severe water shortage.
Based on our six models, we work out the following findings. By the year of 2030, world population will reach 8.4 billion; our demand for energy will increase 29%; food production index will raise 32.68 percent;the total thermal energy equirement will increase 45.01%, that is to say, the demand for food will increase 45.01%; the food supply index will be 0.7261, that is, food will be short of supply; the water consumption per person will be 547 and the world will be in the shortage of freshwater. If the population, energy, food, freshwater and the interaction of four factors working together, our world will probably be involved in the "perfect storm" by 2003.
In order to prevent the "perfect Storm", we advise as follows. Firstly, we should control the population, and improve the quality of people. Secondly, we should increase production per acre, and eat more plant products and less meat. Thirdly, we should plan energy consuming,and develop new energy resources. Forthly, we should  prevent water from polluting and develop the desalination technology. What’s more, we should protect environment and promote sustainable economic development.

作者: 骄阳 时间: 2009-5-11 15:48
厉害！！真不错

作者: kira1122 时间: 2009-5-11 21:28
补充下，尤为推荐1041和1054，是C题少有的个位数篇值得一看的

作者: 李桂英 时间: 2009-5-13 00:08
完美风暴的指标。。。不太确定吧

作者: feidu 时间: 2009-5-13 02:29
不错，不错

作者: jixinyu 时间: 2009-5-18 12:10
完全看不懂啊

作者: angle838 时间: 2009-5-21 13:39
怎么成绩还不出来啊。期待ing ！

作者: l0310i 时间: 2009-5-29 19:54
…………………………………………………………………………6

作者: starry13 时间: 2009-5-29 20:18
看不懂诶~··

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