离散

In this paper an optimum design method complex method with mixed discrete variables is discussed with the focus on the optimization design of discrete and continuous variables.

针对工程中大量存在的设计变量为离散型和连续型的混合离散变量的情况，探讨了一种优化设计问题的方法———混合离散复合形法。

In discrete selection, one or more discrete objects are selected, and the incoming data is handed to the selected discrete objects, which process the data in their own ways.

在离散选择中，一个或多个离散对象选中。输入的数据交给选中的离散对象，它们各自以自己的方式处理数据。

This design of variable structure sliding mode control for discrete time system using method of approach law is studied.

研究了线性定常离散系统、离散不确定系统、滞后离散确定系统变结构控制策略。

For the diffractive optical element realizing beam shaping in the fractional Fourier transform domain,the transform matrix calculated by the discrete sampling points was compared with that calculated by the Fresnel integral,and the discretization error of the intensity distribution on the output plane was qualitatively obtained.

针对分数傅里叶变换衍射光学光束整形器件，比较了按离散点与按菲涅耳积分计算得到的变换矩阵间的差距，从中分析得出按离散点计算的变换矩阵引入的离散化误差与分数傅里叶变换系统参数的关系。

In this paper,results of Markov chain are used under the circumstances of the automaton model which belongs to logical level of Discrete Event System to analyze the steady states and transient states of the Markov model of DES,respectively based on four conditions of discrete-time parameter and continuous-time parameter.A simpler decision rule of system ergodic property which applies both to the conditions of discrete-time parameter and continuous-time parameter is presented through an example.The transient states of DES which under the condition of continuous-time parameter are analyzed and computed based on Kolmogorov backward equation or forward equation.

利用马尔科夫链的结果，在离散事件系统逻辑层次的自动机模型基础上，对DES的Markov模型的稳态和暂态特性，分别从时间参数连续和离散的情况下，分四个情况进行了分析，通过实例对系统遍历性提出了一条更简单的且在连续和离散时间参数情况下都通用的判定规则，并利用Kolmogorov向后或向前方程，对连续时间参数DES的暂态特性进行了分析和计算。

In ordor to weave the varied weft density fabric of which weft distribution pattern is prescribed in sections,the definition field of fabric′s weft density function is divided into continuous and discrete intervals according to the variation characteristics of weft density of fabric.

为织造出分区段设定纬密变化的疏密纬织物，根据织物的纬密变化特点，把织物纬密函数的定义域分成连续区间和离散区间；在此基础上，对于分段连续且可能存在间断点的连续区间，建立了卷取量方程；分析并确定了织物各纬卷取量的解区间，给出了卷取量的求解方法——以解区间足够小为解判据的二分法，并阐明了求解方法在间断点处的有效性；对于由离散点构成的离散区间，给出了区间端点卷取量的取值方法和区间中各纬卷取量的确定方法。

Weft distribution pattern and its input of fabric with varied weft density ;2. In ordor to weave the varied weft density fabric of which weft distribution pattern is prescribed in sections,the definition field of fabric′s weft density function is divided into continuous and discrete intervals according to the variation characteristics of weft density of fabric.

为织造出分区段设定纬密变化的疏密纬织物，根据织物的纬密变化特点，把织物纬密函数的定义域分成连续区间和离散区间；在此基础上，对于分段连续且可能存在间断点的连续区间，建立了卷取量方程；分析并确定了织物各纬卷取量的解区间，给出了卷取量的求解方法——以解区间足够小为解判据的二分法，并阐明了求解方法在间断点处的有效性；对于由离散点构成的离散区间，给出了区间端点卷取量的取值方法和区间中各纬卷取量的确定方法。

In chapter three, the elliptic curve discrete logarithm problems on the elliptic curve finite group are discussed.

第3章在介绍有限域上的离散椭圆曲线的基础上，深入讨论了椭圆曲线有限群上的椭圆曲线离散对数问题，研究了目前已知的椭圆曲线离散对数问题的几类求解算法，分析了这些算法的特点和应用范围，并总结归纳出了一系列的安全椭圆曲线选取准则。

At present,the research of digital watermarking focused on discrete fourier transform domain, Discrete cosine transform domain, Discrete wavelet transform domain and others, but its robustness need to be improved.

目前，对于频域数字水印技术的研究主要集中于离散傅里叶变换域、离散余弦变换域和离散小波变换域等，但其鲁棒性能都有待提高。

Then, the concept of frequency warping is then extended to discrete Fourier transform, discrete cosine transform and discrete wavelet transform, i.e., applying the idea of nonuniform frequency resolution to these common transforms.

接著，我们将频率变形的概念延伸离散傅立叶转换、离散余弦转换以及离散小波转换，把不均匀频率解析度的原理应用在这些讯号处理常使用的转换式上。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。