逆计算

Calculation of power system matrix inversion procedure for the formation of nodal admittance matrix.

详细说明：电力系统计算中的矩阵求逆程序，用以形成节点导纳矩阵。

The property of symmetry can also be used to save a part of the computational effort required for matrix inversion or for a solution of equations.

对称的特性也可用来节省矩阵求逆中或求解方程中所需要的一部分计算量。

DRBEM requires inversion of a matrix formed by approximation function, which makes this method inefficient for large problem.

在双互易边界元法中需要对由近似函数形成的矩阵求逆，这在计算大型的实际工程问题是很费时的。

The first one is to study how the convergence properties of Newton-type methods change with convergent order. The second one is to study what will infects the computation of the inversion of Jacobi matrix.

本项目对其涉及计算复杂性的几个问题进行的研究，关心的问题是： 1）Newton型方法的收敛性随着阶变化的关系。2）寻找是什么影响着Jacobi矩阵逆的逼近。

The accuracy of Helmhotz matrix is raised 10 times than that of spectrum, and the calculation speed is faster than that of the direct solution. In this way, the method can reduce the time of matrix inversion in 3dimensional implicit difference migration and can be used to real data processing.

因此，该方法的提出，在计算精度许可的条件下，最大限度地减少三维隐式差分偏移中矩阵求逆占用的时间，从而使得该方法能真正用于实际地震资料的处理。

According to a typical OFDM signal model, this paper proves that the coefficients matrix of the intercarrier interferenceis a unitary matrix whose inverse matrix is much easier to get, and then proposes a new ICI cancellation method with less computation complexity based on sending pilot symbols.

根据一种典型的OFDM系统模型，证明了载波间干扰系数矩阵为酉阵，并利用其容易求逆的性质，提出了一种基于发送训练码的ICI消除方法，以较小的计算复杂度对接收信号进行处理来消除ICI。

In this dissertation, we construct the Bariev model with nine kinds of boundary fields by the matrices K_± defining the boundaries. And then the Lax operator is given in the form ofmatrix, as well as the basic quantities, e.g., the R -matrix, the monodromy matrices and the transfer matrices are defined. By using the expression of the local Lax operator of the model,the action of the monodromy matrices T, T~(-1), U_ on the pseudo-vacuum state is given outin detail. Furthermore, the main fundamental commutation relations are obtained through the reflection equations, the recursive n-particle state as well as the one-particle exact solution is given and the Bethe ansatz equations are found accordingly. Finally, we list the nesting boundary K matrices, which play a crucial role for obtaining the n-particle solution and finding the Bethe ansatz equations, the eigenvalues of the transfer matrices and the energy spectrum of the system by means of the nested algebraic Bethe ansatz method.

在这篇文章中，我们利用边界K_±矩阵构造出了具有九种边界场的Bariev模型，同时给出了该模型L算子的具体矩阵表示形式，并定义了R矩阵，monodromy矩阵以及转移矩阵；接着利用L算子的矩阵形式，给出了其对应monodromy矩阵T、逆矩阵T~(-1)作用到真空态上的值，并利用Yang-Baxter关系及反射方程得到了双行monodromy矩阵U作用到真空态上的值；然后利用反射方程通过复杂的计算得到了一系列重要的基本对易关系式，并给出了模型的递推的多粒子波函数、单粒子解及Bethe ansat方程；最后给出了模型的嵌套的边界K矩阵的具体形式，从而为运用嵌套Bethe ansatz方法求解该模型的多粒子解、Bethe ansatz方程以及系统的能谱打下了很好的基础。

As we know,Newton's interpolation polynomial is based on divided differences which can be calculated recursively by the divided-difference scheme while Thiele's interpolating continued fractions are grared towards determining a rational function which can also be calculated recursively by so-called inverse differences.

大家都知道，牛顿的插值多项式是基于均差的，可以递归出均差，而Thiele插值连分式是一个有理插值，也可以递归地计算，即所谓的逆。

We summed up fault characteristics of both the plane and the section, which devoloped at sedimentary rocks in Binbei region in Songliao Basin and calculated the indexes of the growth faults, analysing the distrbution and acting features of the thrust faults.

总结了滨北地区沉积层内的断裂在平面和纵向上的分布、发育规律；计算了同沉积断层的生长指数；分析了逆断层的活动分布特征。

Discussed the screw theory and the product of exponentials formula used to solve the manipulator inverse kinematics problems.

讨论了用旋量和指数积公式计算PUMA类型6自由度机器人运动学逆解的方法。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新