查询词典 least squares

An accurate and simple computational method was developed to determine the apparent activation energy and material parameters of the hyperbolic sine constitutive equation based on one parameter nonlinear least squares regression.

基于单参数非线性最小平方法，提出了一种优化求解双曲线本构方程中表观激活能和其他材料常数的方法。

Keywords hyperbolic sine equation;flow stress;activation energy;non-linear least squares

双曲线方程；流变应力；激活能；非线性最小平方

Each end point of an imaginary linear regression trend line makes up a path for this curve. All these imaginary trend lines are placed at nearest distance to the closing prices through 'least squares' method applied to the input set bars.

每一根绘制的线性回归趋势线的末端标志着曲线的路径，而所有的趋势线以价格的最小距离摆放，通过输入的K线的最小方差方法。

The conventional matrix decomposition methods have been used to find the least-squares solutions of the abovementioned inconsistent matrix equations over given matrix set in many references, and the general expressions of these solutions were obtained. But it is difficult to determine the solution of Problem I by utilizing these expressions due to the fact that the orthogonal invariance of Frobenius norm does no hold for the general nonsingular matrices.

对于求上述不相容矩阵方程在给定矩阵集合上的最小二乘解，很多文献中利用传统的矩阵分解方法得到了其通解表达式，但是利用该表达式很难得到问题Ⅰ的解，这是因为一般的非奇异矩阵并不满足Frobenius范数的正交不变性。

The inconsistent equations may be formed with the surveying data of the GPS network of monitoring crustal movement and deformation on the continent of China in 1994 and 1996, and by using the damping method of least squares and the interative computing method, the parameters of crustal movement and deformation can be obtained.

利用全国网1994年和1996年的两期GPS观测数据，组成矛盾方程组，应用阻尼最小二乘方法，经迭代解算，得到所需要的地壳运动与形变参数。

In this part, the traditional solution of the least squares adjustment with inequality constraint is analyzed at first.

首先分析了不博士学位论文摘要等式限制条件下的最小二乘平差的传统解法。

Based on the return2calculating sequential conditional least-squares technique and the upper-triangular Cholesky decomposition algorithm, a new approach to resolve GPS carrier phase integer ambiguity solution , which is referred as Return-Calculating LAMBDA approach , has proposed in this paper.

基于回代解算的序贯条件最小二乘技术和上三角的Cholesky分解算法，提出求解载波相位模糊度的一种新算法——回代解算的LAMBDA方法。

A kind of method to determine boundary conditions of interpolating quadric spline function with halfknots as conjunction points, which is C 1 continuous but its second derivative function is piecewise constant, is obtained by means of least squares.

鉴于此，本文利用最小二乘法，获得了一种半节点二次插值样条边界条件确定方法，该方法可以保证二次插值样条在半节点处二阶导数的变化最小，这相当于保证了曲率的变化最小。

Based on the finite element inverse analysis and the least squares method, a method is established to identify loads on piezoelectric smart structures. The method chooses the piezoelectric responsive charge as the parameter in the object function.

本文从航空航天等领域利用压电智能结构进行结构健康监控的工程背景出发，对压电智能材料结构承受低能量冲击荷载及损伤的识别问题进行了研究，重点对压电智能材料结构的荷载识别方法进行了较广泛、深入的研究。

The inverse of condition number is recommended as a good prior criterion for choosing response positions in least squares approach.

条件数的倒数在最小二乘法响应点的选取时可作为优选的先验判据，归一化残差可作为估算质量的后验判据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。