查询词典 discrete continuous system

Through the new research methods, this thesis has made the following contributions in this field: 1. For the first time the curvature radii and relative angles of a planar continuous curve at discrete points are chosen as local parameters to represent the curve, which reflect clearly the local geometrical characteristics of the curve and are easy to be dealt with.

借助于新的研究方法，本文在这一领域作出如下贡献：（1）首次提出用曲线上离散点处曲率半径和相对转角作为局部参数表示平面连续曲线，直观地反映曲线各个局部的几何特征，且便于曲线的修改和变换，并通过机构运动分析，快速求出机构轨迹的这两个局部参数。

First, the problem of choosing sample time in the discretized variable structure control of continuous-time systems is analyzed, then direct design methods of variable structure for discrete-time systems are discussed.

首先研究了将连续系统的变结构控制理论离散化后应用在离散系统时采样时间选取的问题，接下来讨论了直接针对离散系统的变结构控制的设计。

Using the special wavelets, which included Marr, Haar and DOG for the continuous wavelet transform and biorthogonal wavelet for the discrete wavelet transform, the peak positions of the component's responses, described by Gaussian, Lorentzian and sech〓-function, could be determined via WT from the overlapped signals.

以特殊小波(Marr，Haar和DOG小波和双正交小波)，分别利用连续和离散小波变换对不同类型(Gaussian， Lorentzian和sech〓-function型)重叠信号的峰位置提取进行了详细研究，给出了相应的理论依据。

A flexible chain undergoes a continuous transition but a semiflexible chain undergoes a discrete transition.

除此之外，高分子链的硬度也影响了"coil-globule transition"的形式，硬度低的高分子链进行连续式的coil-globule transition，硬度较高的高分子链则进行了不连续的coil-globule transition。

The average correct rate of simple fraction concepts was between 86.4% and 97.4%, whenever continuous or discrete contexts.

在简单分数概念表现上，解简单分数连续量和离散量问题的答对率在86.4﹪~97.4之间，显示此类问题对台湾北部地区高年级学童是容易的。

The model generalizes the input-output function in transiently chaotic neural network to a class of continuous, differentiable and monotone increasing functions. Secondly we study the uniformly asymptotical stability of equilibrium in the non-autonomous model. Finally, several examples and numerical simulations are given to illustrate and reinforce our theories. In chapter 3, we firstly introduce a specific class of discrete-time neural network models with sinusoidal activation function.

在本文的第二章中，首先介绍了一类具有广义输入输出函数的非自治离散神经网络模型，该模型把瞬时混沌神经网络模型中的输入输出函数推广到了一般的单调递增且连续可微的函数；其次，利用Schauder不动点原理和利用Lyapunov函数逆定理依次证明了模型平衡点的存在性和在时变权值下的一致渐近稳定性；最后，对几个具体的例子进行数值模拟，数值模拟的结果更好地说明了我们的结论。

First continuous gestures are discretized and an original solution is found in discrete domain based on MDL criterion.

在此基础上，返回到连续域训练MDL准则约束下的HMM模型。

For further study to improve performance, an adaptive control algorithm based on Neural Network is tried in stabilization control. A new method of selecting the initial weights of Neural Network is put forward, which is that the coefficients of discrete equivalent of continuous transfer function in traditional control are used as the initial weights of Neural Network. Adaptive Neural Network control is combined with traditional control by using different method in different segment.

作为进一步提高稳定系统性能的探讨，对基于神经网络的参数自适应调整控制方法在稳定控制中的应用进行了研究，提出了将传统校正方法经离散化后所得到的数字控制算法的系数作为神经网络权值初值的新方法，并采用分段控制，将传统校正方法和神经网络控制方法相结合，取得了较好的控制效果。

The major topics are: Poisson process, renewal process, discrete time and continuous time Markov chains, stationary process, Brown motion and stochastic integral introduction

本课程的主要内容包括泊松过程与更新过程、离散时间与连续时间的马尔可夫链、平稳过程、布朗运动与随机积分初步。

It was supposed that the dynamic moving process of the stock price and the return was driven by Geometry Brownian Motion and the lognormal distribution respectively. Takinginto account the riskneutral environment, we got a closedform analytical formula for deferred arithmetic asian options by the method of Taylor expansion of the stochastic integral formula within the terminal payoff. Furthermore, with the series definition of the definite integral, we transferred the continuous problem into a discrete one which is simpleenough to figure out. Meanwhile we tested the accuracy of the formula with the Monte Carlo simulation as a benchmark and the result shows that the formula can be utilized to price the related financial derivatives.

在标的价格服从几何布朗运动、收益服从对数正态分布的前提下，通过风险中性定价原理，对到期损益中的随机积分进行任意次Taylor近似，并由级数定义将此连续问题离散化，给出了延期算术平均亚式期权封闭形式的解析定价公式，并与Monte Carlo模拟得到的价格作为标尺对得到的公式进行精确性检验，结果表明，所得公式可以应用到金融实务中对此类衍生品定价中。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。