离散问题

The design problem of gain-scheduled H2/H(subscript ∞) filter for polytopic discrete-time systems is investigated.

研究凸多面体不确定离散时间系统的变增益H2/H滤波器设计问题。

When a matrix inequality is satisfied, based on the modified Lyapunov function, the system without unknown disturbance can be quadratically stabilized under static state feedback control.

然后研究离散时间时延系统的鲁棒跟踪控制问题，通过求解一个LMI得到控制器的增益矩阵，进而使得闭环系统的状态变量渐近跟踪上任意预先设定的轨迹。

The work of this present paper mainly includes the investigation of the structure of KDD system, the study of the basic concepts of rough set theory, the research of the questions in the heuristic reduct finding algorithms based the rough set theory used in the data reduction and the discretization in the field of KDD, and the development of the system which is used to study the algorithms of the rough set.

论文的主要工作是了解知识发现的体系结构，学习粗糙集理论的基本概念，研究基于粗糙集理论的约简算法在知识发现领域中进行数据约简和离散化两个方面存在的问题，开发用于粗糙集理论算法研究的实验平台。

The use of stabilization methods for convenient mixed elements introduces stabilization parameter which results in the nonzero positive semidefinite lower right block.

论文中应用了两种离散鞍点问题的方法，一种是低阶混合协调有限元方法，另一种是M.A.C格式的有限差分法。

In this paper a new recursive DFT is proposed based on sum-and-difference formula of trigonometrical function and solution of linear equations. Its computation work is nearly the same as that of traditional recursive DFT, but it can solve many problems effectively which can't be solved easily by traditional recursive DFT, such as algorithms for overcoming attenuation direct-current component part existing in power system.

文中基于三角函数的和差公式以及线性方程组的求解，提出了一种新的递推离散傅里叶变换算法，它的计算量与传统递推算法接近，但可以解决传统递推算法不易解决的许多问题，如适用于人们提出的克服电力系统中衰减直流分量对DFT影响的一些方法中，因而具有广阔的应用前景。

In chapter two and three, for the low-frequency electromagnetic problems in multi-media, an alternate A-φ method (in Chapter 2) and a fractional-step A-φ method (in Chapter 3) based on ungauged vector potentials are developed respectively.

第二、三两章关于多媒质中的低频电磁问题发展了基于非规范势的交替A-φ方法和分数步A-φ方法，并在一定条件下对这两类方法的全离散有限元逼近误差进行了理论上的分析和估计； 3。

The optimal design of the viscously damped beam-oscillator and plate-oscillator combined system are studied.

研究了含离散弹簧质量振子连续梁和连续板混合系统的响应优化设计问题。

In particular, we discuss impact of various parameters change to the model, such as, disperses and the conversation between pixels and distance and aberrations, and give some recommendations for improvement.

特别地，我们也讨论各种参数变化对模型的影响、离散化及像素和距离的转换对模型的影响和畸变对图像影响等问题，并给出了一些改进建议。

Research on the description of the controllable region of LTl discrete anti-stable saturating systems.

3对饱和受限的离散线性定常反稳定系统的可控区域描述问题进行了研究。

Usually, the experimental model is the basis of design of the curved objects and their dies. Auto measurement planing and constructing descriptive model with scatted 3D data for complex sculptured surface is a hot research subject in current.

本文在系统研究离散数据曲面造型方法的基础上，着重对具有复杂曲面外形零部件的测量、造型和数控加工中的若干关键技术问题进行了研究。

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。