离散问题

After discussing the general methods and solving steps, we study and give the discrete functions under the flow field situation for different accuracy demand, and then make the numeric calculation.

首先论述水平集方法的一般原理及解决问题的流程。然后，针对速度场的情况，研究并得出了多种求解精度要求下水平集方程的离散表达。

In this paper,a numerical well test method is presented to study the inter-well interference effect on the well test curve,which used PEBI grid and gave the discrete control equations of oil-water-phase flow .

本文用数值试井方法研究了井间干扰对试井曲线的影响，采用PEB I网格技术，给出了在PEB I网格下油水两相流动控制方程的离散形式，并耦合了井筒存储和表皮系数公式，得到了压力降落数值试井问题的产量模型。

Fast Fourier transform and discrete cosine transform a simple, and it is only a small problem, not repaired, huh.

快速傅立叶变换和离散余弦变换的简单实现，有一些小问题，就不修复了，呵呵。

In GIS and cartology, the boundary searching of discrete object group is an important problem. The traditional algorithm is based on vector data.

搜索离散目标群的边界是地界信息系统和地图学中一个重要问题，传统的算法是基于矢量数据的。

In this dissertation, two new proxy signature schemes from bilinear pairing are proposed, which are all based on discrete logarithm problem on GDH group. In the first scheme, the proxy signing ability can be revoked during the period of validity. Then, the malicious signer can not sign messages any more. Moreover, in this scheme secure channels are not needed.

本文基于GDH群的离散对数问题结合短签名的特点设计了两个代理签名体制，第一个体制可以在证书的有效期内撤销代理签名权，从而防止不诚实的代理签名者继续签名，而且无需安全信道。

As a relatively new field, discrete mathematics has a number of fundamental open problems.

作为一个相对较新的领域，离散数学有一个基本的开放问题。

This book will focus on the core of Cryptography of issues, from the application point of view of discrete mathematics of cryptography on a system.

本书将重点集中放在密码学研究的核心问题上，从应用离散数学的角度对密码学进行了系统阐述。

The probabilistic method is a powerful tool for tackling many problems in discrete mathematics, especially in combinatorics.

概率方法是解决离散数学尤其是组合数学中许多问题的强有力工具。

Then, we use an adaptation of branch-and-bound methods to solve the remaining discrete optimization problem.

然后，我们使用了一个适应的分枝定界方法来解决剩余的离散优化问题。

It is appropriate to deal with the discrete and multi-variable combined optimization problem.

遗传算法是一种基于自然选择和进化机制而形成的一种自适应全局优化算法，它非常合适处理离散的、多变量的组合优化问题。

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。