wosee 发表于 2007-6-25 20:13

求救!93年美国数模竞赛题----环保肥料生产问题

<strong><font size="2"><br/></font></strong><span style="FONT-SIZE: 12px;"><font size="4">加速肥料生产问题<br/>一家环保餐厅用微生物将剩余的食物变成肥料。餐厅每天将剩余的食物制成浆状物，并与蔬菜下脚及少量碎纸混合成原料，加入真菌菌种后放入容器内。真菌消化这些混合原料，变成肥料。由于原料充足，肥料需求旺盛，餐厅希望增加肥料。但因无力购置新设备，餐厅希望用增加真菌活力的办法来加速肥料生产。试通过分析以前肥料生产的记录，建立反映肥料生成机理的数学模型，提出改进肥料生产的建议。<br/>食物浆&nbsp;&nbsp;蔬菜下脚&nbsp;&nbsp;碎纸&nbsp;&nbsp;投料日期 产出日期<br/>86&nbsp; &nbsp; &nbsp; &nbsp; 31&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.07.13&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.10<br/>112&nbsp; &nbsp; &nbsp; &nbsp; 79&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.07.17&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.13<br/>71&nbsp; &nbsp; &nbsp; &nbsp; 21&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.07.24&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.20<br/>203&nbsp; &nbsp; &nbsp; &nbsp; 82&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.07.27&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.22<br/>79&nbsp; &nbsp; &nbsp; &nbsp; 28&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.10&nbsp; &nbsp; &nbsp; &nbsp; 1998.09.12<br/>105&nbsp; &nbsp; &nbsp; &nbsp; 52&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.13&nbsp; &nbsp; &nbsp; &nbsp; 1998.09.18<br/>121&nbsp; &nbsp; &nbsp; &nbsp; 15&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.20&nbsp; &nbsp; &nbsp; &nbsp; 1998.09.24<br/>110&nbsp; &nbsp; &nbsp; &nbsp; 32&nbsp; &nbsp; &nbsp; &nbsp; 0&nbsp; &nbsp; &nbsp; &nbsp; 1998.08.22&nbsp; &nbsp; &nbsp; &nbsp; 1998.10.08<br/>82&nbsp; &nbsp; &nbsp; &nbsp; 44&nbsp; &nbsp; &nbsp; &nbsp; 9&nbsp; &nbsp; &nbsp; &nbsp; 1999.04.30&nbsp; &nbsp; &nbsp; &nbsp; 1999.06.18<br/>57&nbsp; &nbsp; &nbsp; &nbsp; 60&nbsp; &nbsp; &nbsp; &nbsp; 6&nbsp; &nbsp; &nbsp; &nbsp; 1999.05.02&nbsp; &nbsp; &nbsp; &nbsp; 1999.06.20<br/>77&nbsp; &nbsp; &nbsp; &nbsp; 51&nbsp; &nbsp; &nbsp; &nbsp; 7&nbsp; &nbsp; &nbsp; &nbsp; 1999.05.07&nbsp; &nbsp; &nbsp; &nbsp; 1999.06.25<br/>52&nbsp; &nbsp; &nbsp; &nbsp; 38&nbsp; &nbsp; &nbsp; &nbsp; 6&nbsp; &nbsp; &nbsp; &nbsp; 1999.05.10&nbsp; &nbsp; &nbsp; &nbsp; 1999.06.28<br/><br/>(1)模型假设:<br/>(2)仿真要求<br/>①画出系统元素-环境关系图<br/>②列出微分方程模型(初值自定)<br/>③利用四阶Runge—Kutta法仿真计算<br/>④分别以数表和图形的形式输出结果<br/>⑤分析影响系统行为的主要因素 <br/><br/><br/>这个题谁能帮我解决下啊<br/>初次接触建模问题，哪位朋友帮我解下我拿来学习研究以下。<br/><u><b>可以忙我只建立模型就可以，全做出来更好[/</b>u]如果谁有现成的解麻烦请发到我的邮箱里，在这里谢过了<img alt="" src="http://166.111.25.5/bbs/images/smilies/smile.gif" align="absMiddle" border="0"/><br/>邮箱：</u><a href="mailto:xjc_love@126.com"><font color="#000066">xjc_love@126.com</font></a><br/></font></span>
[此贴子已经被作者于2007-6-25 20:14:59编辑过]

oilplummyblack 发表于 2007-10-12 21:19

<p>这道题考虑的是废纸中的C、N比，我们都有打印的论文参考，有电子版的</p><p></p>
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