逆计算

To reduce the computation complexity of the eigenspace-based adaptive beamforming algorithm and improve the performance of it with a small number of snapshots,a modified eigenspace-based adaptive beamforming algorithm based on an unitary transformation is proposed.

1引言在众多阵列信号处理算法中，Feldm an等提出的基于特征空间的自适应波束形成算法[1]由于具有较强的稳健性能而受到学者们的广泛重视[2-4]，但ESB算法需进行复矩阵求逆和特征分解，计算复杂度高。

The "compressed sparse row data format" is adopted to save storage and the "mode multiplication" is used to improve the computation efficiency, so that the finite integration equation is obtained with low storage and high efficiency. To solve the finite integration equation, which is a large-scale sparse algebraic eigenvalue problem under the condition specified, the Krylov subspace iteration method is introduced and the shift-invert Arnoldi method is proposed to exclude the unphysical static electro-magnetic solution and get the needed eigensolution around the specified eigenvalue.

采用"行索引稀疏格式"压缩存贮技术节约内存，采用大型稀疏矩阵的模式乘法，提高矩阵计算效率，高效获得了离散电场分量满足的有限积分方程；针对有限积分特征方程的求解，论文介绍了大型稀疏矩阵Krylov子空间迭代方法，并提出了位移求逆Arnoldi算法，以排除非物理的静态电磁场解，获得指定频率附近的特征值。

The breeding values of 12 dairy bull, were evaluated by BLUP method, and the parameters μ, h_i, g_i, S_(jk were obtained by using computer. Comparing this evaluation with thnt of not using relationship matrix, there are some difference between them. In the calculation, A~(1-)should be added to the elements of bull, effect on the diagonal of matrix.

本文以南京市12头乳用种公牛(其中引进上海市6头、合肥市1头的冻精)为实例，应用公牛间有亲缘关系的BLUP法估计其育种值，电算求得参数μ、h_i、g_i、S_(jk，按育种值排列优劣名次，并与不加入公牛间亲缘关系的结果进行比较，发现两法间略有差异，其计算方法在矩阵对角线的公牛效应元素上加A~(1-)(即公牛间亲缘关系的逆阵)即可。

A picking arm model is established using three-dimension entity software Pro/E and the kinematics analysis and forward and reverse solution calculation of the picking arm are made using D-H method. The kinematics simulation function of ADAMS is used for the simulation analysis of the kinematics features of the forestry nut picking arm and the feature curves of displacement, velocity and acceleration of the end effecter of a machine under a specific motion status are obtained, which provides reference evidence for the motion control and the optimal design of picking arms.

利用三维实体软件Pro/E建立采摘臂模型，并采用D-H法对采摘臂进行运动学分析和正逆解计算；应用ADAMS的运动仿真功能对林木干果采摘臂的运动特性进行仿真分析，给出了机器在特定运动状态下末端执行器的位移、速度及加速度等特性曲线，为采摘机的运动控制及优化设计提供参考依据。

In order to improve the precision of the altimetry gravity computed by the inverse Stokes formula, the geoidal height of the innermost area is expressed as double cubic polynomial, and a formula to calculate gravity anomaly of this area is derived after the non-singular transformation is introduced.

为提高利用逆Stokes公式反演测高重力的精度，将中央区大地水准面高表示成双三次多项式插值形式，引入了非奇异变换，推导出了重力异常的计算公式。

Due to the reduction of the size of the matrix to be inversed at each stage, the detector embodies low complexity.

由于每级检测用户的干扰用户数最小，减小了每级MMSE检测求逆矩阵的大小，从而在降低计算复杂度的同时，也提高了每级检测的性能。

As a part of the inverse problem, the forward problem was calculated using regionalized Gauss-Legendre numerical integral method.

作为逆问题的一部分，提出基于区域分解的Gauss-Legendre数值积分方法，计算磁感应成像的正问题。

Through testing practically and calculating theoretically, this paper has evaluated generally the energy consumption of the SCR arc welding power source?the DC arc welding generator and the inverter arc welding power source for manual arc welding machine used in production.

通过实际测试与理论计算，对晶闸管整流电源弧焊机、直流弧焊发电机和逆变电源弧焊机等生产中常用的焊条电弧焊焊机的耗电量情况进行了综合评价。

In order to reduce the computation complexity of the matrix-vector product and the iterative times in the process of matrix inversing, a new wavelet-like preconditioning operator based on the lifting scheme is used.

一种新的基于提升法的类小波变换预处理算子的使用，降低了矩阵向量积的计算复杂度和求逆过程中的迭代次数。

Aiming in solving this problem, an improved layered soace-frequency scheme based on inversing and sorting only once for the broadband MIMO-CDMA systems is proposed.

为此根据实际情况，改进方案充分利用均衡系数的计算特性，只进行1次伪逆和1次排序运算。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。