机构地区: 西南科技大学理学院
出 处: 《数学的实践与认识》 2007年第11期99-105,共7页
摘 要: 为一个1000×500(米)地区沙子的开采进行工程设计和评估.根据该地区20×10个网点处有关数据,估算该地区的沙的储量是210万吨.在每月10万吨的开挖量的限制条件和考虑1%的月贴现率下,引入开采每吨沙土所获利润函数,确定开采沙子的施工原则是实现该函数由大到小.然后照顾施工方便设计每月具体工程方案,计算出整个工程需投资2364.6万元,工期30个月.可采沙195.54万吨,获利润近1500万元,利润率在60%以上. This paper presents evaluation and plan for mining sand in an rectangle area. Based on the data of the 20 ×10 net points, We estimate the sand reservation is 2. 1 million tons. Then we introduce a function which shows the profit of each ton for mining. In the sequence of decreasing the function, We design the mining plan monthly. 23. 246 million yuan is needed for the investment as well as we'll get nearly 15 million yuan profit with at least 60% profit margin. The amount of the sand we can mine is 1.95 million tons. The whole period for mining is 30 months.
关 键 词: 曲面三次样条插值 开采每吨沙土所获利润函数 贴现率 部分开采
领 域: [经济管理]