查询词典 fundamental algorithm

Constraint-based MiniCon algorithm is proposed. This algorithm adds a step of view selection. As a result, the problems of missing query rewritings and generating redundant query rewritings in traditional MiniCon algorithm in presence of domain constraints are solved, and the accuracy and completeness of the algorithm is ensured.

该算法在传统的MiniCon算法中增加了一步视图选择，解决了传统的MiniCon算法中丢失查询重写和生成冗余查询重写的问题，保证了算法的正确性和完备性，并给出了相应的算法分析和实例分析。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点，介绍了异步电机调速系统的不同控制策略，详细论述了异步电机矢量控制系统的基本原理：异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等，并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

By analyzing the shortcoming of existing robust algorithms based on random sampling employed in estimating the fundamental matrix, a novel algorithm is proposed for optimal estimation of fundamental matrix.

分析了基于随机抽样检验思想的现有鲁棒算法在基本矩阵的求解问题中存在的不足，提出一种获得基本矩阵最优解的算法。

Fundamental parameters are calculated by symmetrical and orthogonal characteristic of trigonometric function, and the iterative algorithm can calculate fundamental reactive power fast.

根据三角函数的正交性和对称性求解基波参数，采用递推算法快速计算基波无功功率。

The primary work of this paper includes: 1 The general process and the fundamental theory of genetic algorithm is introduced systematically, which is also be applied to an example; 2 The penalty function method and the constraint tournament method are introduced in the paper, which are used to process the constraint limit. Via analyzing the basic principle of NSGA-II ,which is elaborated in the paper, the fast non- dominated sorting method, congestion distance and its comparison operator, the elite strategy and the main process of NSGA-II is researched particularly. 3 Via modeling the fire distribution problem, the model is computed by the algorithm of NSGA-II, which is combined with both the penalty function method and the restraint league tournament method The optimization of two goals are also realized in the paper. The results derived from the VC++6.0 indicate that, two algorithms both have the high convergence, simultaneously the Pareto optimal solution also maintain the variety of distribution.

本文所作的主要工作如下：系统地介绍了遗传算法的一般流程和基本理论，并应用于一个函数优化的实例；研究了用于处理约束限制的罚函数法和约束联赛法，论述了NSGA-II的基本原理，并对其提出的快速非支配排序法、拥挤度及其比较算子、精英策略及NSGA-II的主要流程作了详细的研究；建立了火力分配问题的模型，并将NSGA-II算法分别与罚函数法和约束联赛法相结合对该模型进行了计算，实现了对两个目标的最优化；用VC++6.0编程计算后所得的结果表明，两种算法均具有很好的收敛性，同时Pareto最优解也保持了好的多样性分布。

For a long time, it is a main factor to hamper the real-time application of SHET. The research is carried on aiming to quickening convergence speed. The automatic-changing Homotopy algorithm is proposed in the dissertation. The algorithm, which can change the solving method based on fundamental component, has the advantages of large convergence domain, high convergence rate and high precision. Many trigonometric functions are contained in the mathematical model, during solving equation, the calculated speed and the precision are affected by the calculations of trigonometric functions.

特定谐波消除技术的数学模型是一组非线性方程组，长期以来，方程的求解一直是限制该技术实时应用的关键因素，本文针对特定消谐方程组的快速求解进行细致的研究，提出自动变同伦算法，该算法可根据基波幅值的取值范围来决定采用的求解方法，其对求解方法的可选择性使该算法与其它算法相比具有计算速度快、收敛域宽、计算精度高等优点。

Numerical algorithm and symbolic algorithm arethe fundamental approaches for this problem.

数值算法和符号算法是两类求解多项式优化问题的方法。

Therefore, concerning about the characteristics of this problem, a new algorithm is presented in this paper, basing on the fundamental idea of the Dijkstra algorithm.

结合该问题的特征，基于Dijkstra算法的基本思想，提出了一种求解网络关于指定节点的最大度最小生成树的新算法。

Then the author analyzes fundamental principles of digital watermarking algorithm in detail such as the general framework, classification, and the typical algorithm.

本文比较系统地研究了数字水印在静止图像中的应用问题，首先介绍了数字水印技术及其原理、特点、以及目前的应用状况等等。

Bresenham algorithm is the most fundamental algorithm for drawing line segments in computer graphics.

由于经典的Bresenham直线生成算法一次计算只能生成一个像素点，效率较低。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。