查询词典 qr.

Firstly, based on natural gradient and nonlinear principal component analysis, a matrix equation is obtained by block recursive updating,and then the matrix equation is solved using QR factorization and back substitution to obtain the optimal separating matrix.

此外，结合自然梯度和非线性主分量分析提出了一种块递归的盲源分离方法，构造出按块递归更新的矩阵方程，然后用QR分解和回代法求解该矩阵方程得到最优分离矩阵。

This paper overviews the various algorithms for least square collocation, discusses the matrix QR decomposition, derives the relationship between QR decomposition and generalized inverse matrix, and obtains least square inverse used for calculating matrix. In addition, the estimation formula for least square collocation by QR decomposition and its accuracy formula are derived. A case study is conducted using gravity anomaly test and calculation to demonstrate that the QR method is correct and valid in least-square collocation calculation.

分析了目前采用的最小二乘配置法解算方法，在讨论了矩阵的QR分解方法的基础上，推导得出了矩阵QR分解与广义逆矩阵的关系，得出了可以直接利用QR分解求解矩阵的最小二乘逆，并推导了应用QR分解求解最小二乘配置的估值计算公式和精度估算公式，最后通过重力异常实例进行了计算，得出矩阵的QR分解用于最小二乘配置解算的正确性和可行性。

Second part of the QR code reading pen will start to image process and decode by the

QR码读取笔对於QR码的使用提供了一个非常方便的工具。

The minimum capital required is QR 500,000, and QR 200,000 in a private joint stock company.

最低资本需要的是快速反应500000和200000的 QR 在私人联合股份公司。

The algorithm of QR decomposition will be promoted from general Toeplitz matrix to block-Toeplitz matrix.

将一般的Toeplitz矩阵的快速QR分解方法推广到块－Toeplitz矩阵的情形，通过Cholesky方法计算QR分解中的上三角矩阵，并给出了其实现算法。

On this basis,we explain how QR iteration converges to a block upper triangular matrix,and then state briefly the relationship between QR algorithm and simultaneous iteration.

在此基础上，我们阐明了QR迭代是如何收敛于块上三角阵的，并简明地说明了QR算法与同时迭代之间的关系。

Control of QR barnyardgrass was also studied in this paper. Butachlor, cyhalofop-butyl, oxyfluorfen, pretilachlor, mefenacet and oxyfluorfen plus quinclorac gave adequate control of QR barnyardgrass, however, butachlor in combination with quinclorac and quinclorac plus piperonyl butoxide or agrco were not effective for control of QS barnyardgrass.

本论文还对QR稗草的治理进行了研究，结果表明：丁草胺、千金、果尔、扫茀特、苯噻草胺单剂及果尔和二氯喹啉酸混用能有效的防治二氯喹啉酸抗性稗草，而丁草胺和二氯喹啉酸混用、二氯喹啉酸和增效醚及二氯喹啉酸和表面活性剂蜡混用不能有效的防治QR稗草。

We investigate mixed totally umbilical QR-submanifolds in a quaternionic space form and also study the pseudo-umbilical QR-submanifolds of a quaterninoic space form with some additional conditions.

考查四元数空间形式中混合型全拟脐QR子流形并研究了四元数空间形式中具有某种条件下的混合型伪脐QR子流形。

The first part is the image sensor of the QR codes to capture the QR code images.

第三部分将QR码所解得的资料，经由W99802G内建的Display控制器显示在LCM显示器上。

In chapter three, using the special structure of the covariance matrix, we present a fast high resolution method based on QR decomposition.

探讨了利用QR分解得到信号与噪声子空间的可能性，提出了一类基于QR分解的高分辨快速算法及其改进型。

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。