查询词典 approximation

Based on the supervisory control strategy presented by Wang Lixin in 1994 and the approximation capability of generalized multilinear fuzzy logic systems, a new adaptive fuzzy control scheme called model reference adaptive fuzzy control for M1MO systems is proposed in this paper.

针对一类不确定非线性系统，基于王立新1994年提出的监督控制方案并利用广义多线性模糊逻辑系统的逼近能力，提出了一种MIMO系统的模型参考自适应模糊控制器设计的新方案。

On the approximation that the ink is non-scattering and its refractive index is nearly equal to papers, we propose a spectral reflectance color prediction model for recto-verso halftone images by making use of the theory of the light propagation in paper with long- and short-distance model and net structure of multiple reflection in the recto-verso halftone images.

在假定油墨是非散射介质以及油墨的折射率与纸张的折射率近似相等的条件下，利用光在油墨与纸张中散射迁移路径长短不同的分程理论和多重内反射的网状结构分析方法，研究了光照射在双面印刷品上的光谱反射规律，建立了双面印刷品的光谱反射色彩预测模型。

It is proved that if the RungeKutta method and the linear multistep method are of order p, then the numerical Hopf bifurcation value is an approximation to the Hopf bifurcation value of the equation itself of the same order p.

证明了如果Runge-Kutta方法和线性多步法是p阶的，那么数值Hopf分支值以相同的阶数p逼近于方程本身的Hopf分支值。

This paper proved that the MAXIS algorithm is a 2-approximation to the SC of proper interval graphs with Bounded Degree and α≤ω. where α is the maximum degree of vertices of graph, n is the number of vertices of graph.

本文证明了对一类特殊的真区间图Δ≤(4n~(1/4)且α≤ω，其中Δ是图G中点的最大次，n是图G的点数，α是G的最大独立点集所包含的点数，ω是G的最大团所包含的点数，MAXIS算法是解决其染色和问题的2-近似算法。

By combining the {spdf} interacting boson model and the Eikonal approximation theory, we proposed an approach descibing the inelastic scattering in which the nucleus is excited from the ground state to a negative parity state by the medium energy hadron. In this scheme it is easy to determine the deformation parameter of the collective excited state with negative parity, the form factor and the scattering cross section.

通过把{spdf}相互作用玻色子模型和Eikonal近似理论相结合，我们提出了描述中能强子使核激发到负宇称态的非弹性散射的方案，给出了负宇称激发态的形变参数及散射的形状因子和散射截面。

When the distance between microstructures is larger than 1μm, the influence of space charge is a negligible quantity, and the approximation of metal formula could be used.

研究了介观尺度下半导体表面空间电荷层对微结构间静电作用力的影响，并同宏观尺寸下采用的金属近似公式进行了比较，揭示了半导体表面空间电荷对静电作用力的影响同微结构间距离、材料掺杂浓度等因素的关系。

It also acquires the lower and upper approximation regions of all clustering kernels based on rough set theory,and achieves the explicit object-dividing method by means of their neighborhood system.

依据对象聚类邻域确定聚类数量和聚类核，以及对象的粗糙近似划分，使得聚类具有密度自适应和孤点不敏感的特点，取样分析有效提高了算法效率。

In order to ensure the consistency of the closed-loop system performances, before the AFC is applied, a supervisory controller is used to drive initial tracking errors to a preset closed area, and then the AFC can drive the tracking errors of the closed-loop system to pre-specified neighborhood in the presence of unknown approximation errors of the fuzzy logic system.

为保证系统性能的一致性，在启动自适应模糊控制器前，采用监督控制将初始跟踪误差镇定到给定范围。自适应模糊控制器可在存在模糊逻辑系统逼近误差的情况下，使系统跟踪误差小于预先给定的任意常数。

In chapter III,we consider the wavelet method for the approximation of the nu-merical Bergman kernel.It is very clear that the Bergman kernel plays an importantrole in the complex analysis and elliptic equations.The Bergman kernel has a closedrelation with the Riemann mapping,Green function,Neumann kernel and the Szeg〓kernel etc.

第三章研究了数值Bergman核数值逼近的小波方法，Bergman核在复分析和椭圆型方程中占有重要地位，它与Riemann映射、Green函数、Neumann函数、核等有着密切联系。

In this paper, Newton iteration formula for computing normal depth and critical depth was put forward by mathematical transformation of uniform flow equation and critical flow equation of circular section tunnel. Then, the relationship between the corresponding central angle and the introduced parameters was analyzed. An approximate formula for angle was obtained according to optimal uniform approximation principle. Using this approximate formula as initial value of iteration formula, a direct formula for calculating normal depth and critical depth of circular section tunnel was established after its first iterative.

该文通过对圆形断面均匀流方程与临界流方程的数学变换，分别得到其正常水深与临界水深的牛顿迭代公式，同时，通过对正常水深与临界水深对应的中心角与引入参数之间关系的分析及数值计算，利用最优一致逼近原理分别得到了正常水深与临界水深对应中心角的近似计算式，并以此近似计算式为初值，用迭代方程进行一次迭代得到了圆形断面均匀流水深与临界流水深的直接计算公式。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。