文章目录
- 一、部分题目
- 二、部分论文
- 三、部分源代码
- 四、完整word版论文和源代码
一、部分题目
2014高教社杯全国大学生数学建模竞赛题目
C题 生猪养殖场的经营管理
某养猪场最多能养10000头猪，该养猪场利用自己的种猪进行繁育。养猪的一般过程是：母猪配种后怀孕约114天产下乳猪，经过哺乳期后乳猪成为小猪。小猪的一部分将被选为种猪（其中公猪母猪的比例因配种方式而异），长大以后承担养猪场的繁殖任务；有时也会将一部分小猪作为猪苗出售以控制养殖规模；而大部分小猪经阉割后养成肉猪出栏（见图1）。母猪的生育期一般为3～5年，失去生育能力的公猪和母猪将被无害化处理掉。种猪和肉猪每天都要消耗饲料，但种猪的饲料成本更高一些。养殖场根据市场情况通过决定留种数量、配种时间、存栏规模等优化经营策略以提高盈利水平。请收集相关数据，建立数学模型回答以下问题：
请建立数学模型解决以下问题
问题1 假设生猪养殖成本及生猪价格保持不变，且不出售猪苗，小猪全部转为种猪与肉猪，要达到或超过盈亏平衡点，每头母猪每年平均产仔量要达到多少？
问题2 生育期母猪每头年产2胎左右，每胎成活9头左右。求使得该养殖场养殖规模达到饱和时，小猪选为种猪的比例和母猪的存栏数，并结合所收集到的数据给出具体的结果。
问题3 已知从母猪配种到所产的猪仔长成肉猪出栏需要约9个月时间。假设该养猪场估计9个月后三年内生猪价格变化的预测曲线如图2所示，请根据此价格预测确定该养猪场的最佳经营策略，计算这三年内的平均年利润，并给出在此策略下的母猪及肉猪存栏数曲线。
二、部分论文
三、部分源代码
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\par a=\cf1 @text\cf2 ('D:\\roujia.txt');
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\par q=\cf1 @sum\cf2 (cc(i,j):(c(j)*f(i,j)-c(j)*p(i,j)))*8479*1.5*3+8479*130*1.5*3;
\par e=\cf1 @sum\cf2 (bb(j):1503*(a(j)-7.3371)/2.3888*2.5*10);
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\par \cf1 @for\cf2 (aa(i):\cf1 @sum\cf2 (bb(j):f(i,j))<=1);
\par \cf1 @for\cf2 (aa(i):\cf1 @sum\cf2 (bb(j):p(i,j))<=1);
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\par w=\cf1 @sum\cf2 (cc(i,j):f(i,j)*8479*b(j))+1503*120;
\par \cf1 @for\cf2 (aa(i):\cf1 @sum\cf2 (bb(j):c(j)*f(i,j)-c(j)*p(i,j))>=150);
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\par \cf1 @for\cf2 (aa(i)|(i#le#5):\cf1 @sum\cf2 (bb(j):p(i+1,j)*c(j)-p(i,j)*c(j))>=180);
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f1 @sum\cf2 (bb(j):p(i,j))<=1);
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i,j)));
\par
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