unknown constant meaning in English
未知数
Examples
- The interesting thing is that there have no random parts and no unknown constants in these bounds
有意义的是，这些界中均不含有随机项和任何未知参数 - The interesting thing is that the bound is precise without any unknown constants , which is very important for statistical inference
值得提出的是，在这个误差界中，没有任何的未知参数，这是对统计推断是很重要的 - The regression coefficients in mixed geographically weighted regression model characterize by that portion of its regression coefficients are unknown constants while other regression coefficients are unknown functions of geographical locations
摘要混合地理加权回归模型系数特征是部分回归系数为未知常数，而其它回归系数为地理位置的未知函数。 - The solving steps are as follows : the field is divided into three regions by the cylindrical surface of the finite - length cylinder and the location of the delta - coils . because " the surface current source is placed at the interface , the non - homogenous restricted equation on the magnetic vector potential is transformed into the homogenous helmholtz equation . by using the method of separation of variables to solve equation and according to the interface conditions and the condition at infinity to determine the unknown constants , the expressions for the magnetic vector potential of the three regions are solved out
在求解过程中，假定放置式圆柱线圈是由无穷多个对称圆环线圈密饶而成，首先求解含有有限长磁芯的通电对称圆环线圈的电磁场：以有限长圆柱磁芯的侧面和圆环线圈所在圆柱面为分界面将场域划分为三个小区域，由于场源放置在内边界面上，使得关于矢量磁位的非齐次约束方程转化成齐次亥姆霍兹方程，利用分离变量法求解，根据分界面郑州大学硕十研究生毕业论文摘要条件以及无限远条件确定待定常数，从而得到各场区矢量磁位的表达式。 - On account of the uncertainty existing in the nonlinear ship responded model , we design a dynamic adaptive ship steering controller by using adaptive backstepping . after deducing the update law of the unknown constant , we choose the controller gains to guarantee the closed loop system and the control signal global boundedness
由于船舶非线性响应模型中含有未知常参数的不确定项，因此采用自适应backstepping的方法，选择参数自适应调节律，设计动态的船舶航向控制器，实现在线控制。