查询词典 inverse cotangent

In 1980 Cline and Greville gave the definition of the W-weighted Drazin inverse which is the extension of Drazin inverse.

Cline和Greville于1980年提出长方阵的加权Drazin逆的概念，它是方阵的Drazin逆的推广，有其实用背景。

Umisheet2002 case study verifies the validity of this harmonic mapping algorithm. The comparison between the results obtained with inverse analysis method and incremental based software eta/DYNAFORM witnesses the efficiency and reliability of inverse analysis method using the proposed energy based initial solution algorithm.

UMISHEET' 2002一标准考题中，通过与增量模拟软件eta/DYNAFORM的比较，证明了采用基于弹簧系统能量理论的调和映射思想来求解反向模拟法初始域具有较好的适用性，同时验证了反向模拟法较为可靠的计算结果及较高的计算效率。

In Chapter 6, by using the matrix models of 3-dimensional Minkowski space R〓, first we study deformation properties and integrablilities on spacelike surfaces with a harmonic inverse mean curvature and timelike surfaces with a Lorentz harmonic inverse mean curvature.

在第六章中，首先借助三维Minkowski空间R〓的矩阵模型，研究了R〓中具有调和逆平均曲率的类空曲面和洛伦兹调和逆平均曲率类时曲面的可积性及其形变。

-homology inverse and group homology inverse are defined in this paper on categories of topologicalspace with base point.

在点标拓扑空间范畴中引进了-同调逆和群同调逆的概念，并讨论了它们存在的条件和性质。

In this paper, we used the regularization method and the best disturbed iteration to solve such more extensive equations: every kind of positive problems and inverse problems of the hyperbolic partial differential equation and parabolic equation. We give homologous methods to solve the positive problems and inverse problems of nonlinear Burgers equation and Boussinesq equation.

本文应用正则化方法和最佳摄动量法，解决了一类更广泛的双曲型和抛物型偏微分方程的各类正问题及反问题，对非线性的Burgers方程及Boussinesq方程的正问题及反问题，也给出了相应的求解方法。

The research of this thesis focuses on spectral complements of operator matrices, the Moore-Penrose inverse and Drazin inverse of projections in a C~*-algebra, Weyl theorem and infimum and generalized infimum of quantum effects on a Hilbert space.

本文研究内容涉及Hilbert空间中算子矩阵的谱补、C~*代数上投影算子的Drazin逆及Moore-Penrose逆、Banach空间上算子的Browder定理和Weyl定理、Hilbert空间中量子效应的下确界和广义下确界四个方面的内容。

The research achievement are acquired as follows: 1From mathematical models for inverse scattering in two dimensional homogenous media including Dirichlet, Neumann, Robin,all kinds of probable mixed boundaries and cracks, direct and inverse scattering are discussed, and ill-posed integral equation and indicator function method are formulated for the diverse of boundary identification. It is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solving it by virtual of regularity method, meanwhile, some numerical tests are given.

本研究取得了如下研究成果： 1）在二维均匀介质逆散射各种边界识别的数学模型（包括Dirichlet，Neumann，Robin，各种可能的混合边界问题，裂纹问题）下，分别考虑了正散射问题和逆散射问题，推导了上述各种边界识别的不适定积分方程以及指示函数方法，由于积分方程的核充分表征了散射物的边界，由此说明只要利用正则化方法求解该积分方程，就可以确定散射物的边界，并给出了一些数值实验。

Pairs of images FFT transform and inverse transform example, discrete cosine transform and cosine inverse transform.

详细说明：对图像进行FFT变换和反变换的例子，离散余弦变换和余弦反变换。

Inverse quantization and inverse discrete cosine transform are important operations in MPEG-2 decoding.

反量化和反离散余弦变换是MPEG-2中恢复帧内编码系数或差分系数的重要手段。

The circuit speed and performance are improved due to the new structure. MPEG2 video decoder includes Inverse Discrete Cosine Transformer, Motion Compensation, Variable Length Decode, Inverse Quantization and System Controller etc.

研究了解码器各个功能块VLSI实现的新方法，从电路结构方面进行探索，有效地减小了电路实现规模，而且在速度、性能等方面比文献报道有所提高。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。