It is shown by analyzing large test data that the empirical formula presented in the paper has higher linearly dependent coefficient , lower average relative error and relative standard deviation compared with the traditional empirical formula of orthoscopic and power function 试验数据表明,本文提出的经验公式比传统的直线式和幂函数式经验公式的线性相关系数更高,且平均相对误差和相对标准差都低。
A new method for controller design is proposed . after throwing a lot of study on existing nonlinear control methods , a new method is proposed which is derived from capacitor . considering the action exerted on electric particle between two plates of a capacitor , a kind of restricted function is constructed for state variable 在对现有非线性控制方法充分研究的基础上,归纳、总结出一种新的工程控制方法,这一控制方法的思想来源于电容电极对极间电荷的作用原理? ?将控制器看作是电容电极,而被控对象看作是“粒子” ,经过数学处理,形成一种对状态变量的约束函数式。
According as the cultivated land consolidation criterion of yanqing county , the paper planed the standard farm field layout of the flat region and slopping region , and then setted up the function of calculating the cultivated land consolidation criterion coefficient , finally calculated the cultivated land consolidation criterion coefficient for low , middling and high consolidation levels . according as the non - effective coefficient of cultivated land and three cultivated land consolidation criterion coefficient , the article estimated cultivated land consolidation pote ntial for low , middling and high consolidation levels in yanqing county 依据延庆县耕地整理标准,规划设计出平耕地和坡耕地标准耕作田块平面布局图,建立了用于计算沟路渠田坎系数标准的函数式,并计算出延庆县平耕地、坡耕地在低、中、高三种不同整理水平下沟路渠田坎系数标准,最后测算出延庆县三种不同整理水平下的耕地整理潜力。