最小值

A four-point algorithm is presented in this paper for finding the least-squares solution of R and T,which is based on the singular value decomposition of matrix,and the derivation of the algorithm is provided too.

本文提供一种基于矩阵单值分解求解R和T的最小二乘解的四点算法，并对算法进行了推导，该算法与迭代法相比，具有速度快、用点少的优点，尤其适用于实际应用的颅脑手术可视化系统。

The left singular vector of the projection has been tracked by the projection approximation subspace tracking algorithm. Then the modal parameters are obtained by least square method. At last an experiment is made using a cantilever beam to prove the efficiency and stability of the method by changing the frequency band of the exciting signal.

通过子空间跟踪算法，不断跟踪计算投影的左奇异值向量，再利用最小二乘法求出系统的模态参数，最后用悬臂梁作为实验模型，通过不断改变系统激励的频带范围，验证方法的有效性及稳定性。

Aiming at the disadvantage of conventional BP neural network, such as selecting parameter values by the empirical method, slow convergence speed and easy trap into local minimum points, this paper designs an improved BP neural network system. In order to improve the network convergence rate and reduce the training error, this paper optimizes the initial connecting weight value of neural network by the use of ant colony algorithm and trains artificial neural network by Levenberg-Marquardt algorithm.

针对常规BP神经网络参数的经验式取值方法以及收敛速度慢，容易陷入局部最小点等缺陷，设计了一种改进的神经网络系统，利用蚁群算法优化神经网络连接权初值，并采用LM算法对人工神经网络进行训练，提高了网络的收敛速度，降低了训练误差。

In the fitting of the actual operation, using Matlab graphics software and the use of least squares spline interpolation function is more convenient and have good results in the means.

在拟合曲线的实际操作中，借助Matlab绘图软件使用最小二乘法和三次样条插值函数是较为方便且有良好效果的手段。

The optimal conditions of the amplification was determined by the square matrix titrating method.

对已知TICD_(50)为10~(3.6)的病毒培养物提取模板以10倍等级倍比稀释，进行PCR扩增，以鉴定PCR方法的敏感性，我们建立的PCR方法所能检测的最小TCID_(50)值为0.398。

Synoptophore combined with Yans randomdot stereograph was employed for distant stereopsis. Furthermore, the identifying time for minimal threshold of distant stereopsis was measured simultaneously.

200608/200612间观察在我院行 LASIK 手术的46例中、高度近视患者，于术前，术后1wk，术后1mo检查远体视锐度（包括交叉视差和非交叉视差）及测量远立体视锐度最小辨别阈值的辨认时间。

Then, the result from the least square method is used as initial values of elastic visco-plasticity parameter. The Kalman Filtering stochastic back analysis is carried out.

利用最小二乘目标函数对边坡岩体弹-粘塑性参数进行了确定性反分析计算，并将反演结果作为参数初始值进行了岩体参数的Kalman滤波随机反分析计算。

Results showed that in the frontal cortex, the subcortex and the cerebellum, the mitochondrial O2.- generation peaked at 4 hr after MPTP treatment.

经本论文实验结果我们发现：小白鼠经MPTP处理后，在大脑额叶、次皮质区和小脑的粒线体产生O2·-的速率在四小时达最大值。

An alternative to the classical approach : If the calculated t statistic is used as critical value, what is the smallest significance level at which the null hypothesis would be rejected

另一种想法：如果将算得的t 统计量作为临界值，那么使得零假设被拒绝的最小显著水平是多少？

The absolute distortion was acquired by tangent function. The equation was worked out to calculate the coefficient.

利用正切函数求出绝对畸变值，用最小二乘法解多组数据超定方程，求出拟和公式的系数。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。