检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:王秉昆[1] 景宗湄 顾建新[1] 谈伟[1] 李振文[2] 杨松林[2]
出 处:《沈阳农业大学学报》1989年第1期20-24,共5页Journal of Shenyang Agricultural University
摘 要:依据生物气候相互补偿原理,用作物彼此间产量相对比来确定沈阳市、辽中和新民县粮豆作物播种面积的合理结构,以此达到在不利的天气条件下,保持多年平均总产水平,并使总产均方差最小的稳产目的.用二次规划法解出最优化方案。in accordance with the principle of complementary relations existing between living rganisms and climate,by comparing the yields between crops,efforts were made to decide the rational structure of sowing areas of grain and legume crops in Shenyang,Liao Zhong and Xin Min,in order to maintain a desirable combined average yield lovel over years under adverse weather conditions,and achieve a stable yield by keeping a mimmum mean square deviation.The optimimzed scheme was derived through quadratic programming
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.28