基本算法

Operation principle of the 2×2 and 4×4 optical switches based on the two-facet reflective mirrors and micro electromagnetism actuator is introduced; N×N optical switch matrixes consisting of the 2×2 and 4×4 optical switches are designed based on Benes networking; the rearrangeable non-blocking feature of 4×4, 8×8 and 16×16 optical switch matrixes and their routing algorithm are analyzed by using the principle invented by Euler in Knigsberg Bridge Problem.

介绍了使用双面反射镜的2×2， 4×4光开关的集成光路设计和工作原理；采用Benes网络，以2×2和4×4光开关为基本单元的N×N光开关器件的整体结构，并根据&一笔画&原理，分析了4×4， 8×8和16×16光开关矩阵的可重排无阻塞特性和光开关矩阵的光路选择算法。

By the relation hierarchies idea, database views are constructed. A total design procedure with detailed algorithms is described. The hierarchical trees of relations are built by decomposing refinedly the initial relation s...

文中给出了完整的设计过程与详细的算法，以表示层次、群体与凝聚联系的最小基本依赖集为基础，对初始关系模式逐步求精分解而建立关系层次树，最后转换成层次关系数据库模式。

Based on the statistic feature of block matching moving vector, the method calculates the basic translation vector between current frame and referenced frame through a revisable parameter, and adaptively chooses processing algorithm for image sources with different characteristics.

该方法从分析块匹配运动矢量统计特性出发，通过引入一个可预设置参数，计算当前帧与参考帧之间的基本平移矢量，并自适应地采取混合全局运动、局部运动估计的算法处理不同特征的源数据。

This paper first introduces two basic algorithms of spare signal expansion, ridgelet transform and curvelet transform, and gives their implementation.

本文首先在系统研究稀疏信号表示理论的基础上，实现了其中的Ridgelet和Curvelet 两种基本变换算法。

The predictive coding is based on the relativity between the neighboring pixels. On the coutrary, steganograph will destroy the relativity between the neighboring pixels. Through computing and analysing the predictive error of cover image and steg image, it is obtained that steganograph will increase the predictive error. So the predictive error can be used to detect steganograph.

该算法的基本思想是利用空域隐写会破坏图像相邻像素之间的相关性，而预测编码是利用图像相邻像素之间的相关性来预测的，这样隐写后图像的预测误差将会大于载体图像的预则误差，通过计算隐写前后图像的预测误差来分析图像中是否含有秘密信息。

Through the decomposition of network operation behavior and the data mining of various data,forms the most basic smallest unit of network operation behavior（DNA of network action description）,uses the Teiresias evolution algorithm to carry on the overall situation ergodicity combination to produce the new description language.

通过对网络操作行为的分解和对各种数据的挖掘，形成最基本最小的网络行为语言描述单元，再使用Teiresias进化算法对其进行全局遍历性的组合，计算产生新的描述语言，进行可行性判断后，对可行的结果进行规则匹配并进行风险评估，产生新的防御规则，从而达到入侵防御系统规则库完备的目的。

Permanent magnet synchronous motor driven by triphase sinusoidal current is research object in this paper. On the basis of analysis of the structure, movement principle and math model of PMSM, Fundamental theories and structure of the system of PMSM alternating current servo systems based on DTC are discussed. Then Simulation models of traditional PMSM DTC and PMSM DTC based on vectors subdivision are established separately.

本文以三相正弦波驱动的永磁同步电机为研究对象，在分析永磁同步电机结构及数学模型的基础上，系统阐述了基于直接转矩控制的永磁同步电机交流伺服系统的基本原理和系统构成，并在MATLAB仿真环境下分别建立了传统直接转矩控制和基于矢量细分算法的直接转矩控制系统的仿真模型。

The articale makes a brief introduction of the applying background to the technology, as well as its basic characteristics. it also analyses the present typic watermark inset-algorithm and checking means, further tells some key technologies in practical application, points out a wide prospect digital video watermarking technology will certainly have.

在简要介绍数字视频水印技术的应用背景和基本特点的基础上，分析了目前常用的水印嵌入算法和检测手段，并指出了实际应用中应注意的一些关键技术，指出数字视频水印技术必将有一个广阔的发展前景。

First, this paper gave an brief introduction in terms of theory of the status quo ,basic model, usage area, category, typica l algorithm, capability evaluation, scramble technology, Human vision system and others in digital watermarking technology.

论文首先对数字水印技术的研究现状、基本模型、应用领域、分类、典型算法、性能评价、置乱技术、人类视觉系统等理论进行了综述。

The simulation results show that the performance of uncoded Symbol Error Rate can reach the bound of ideal channel estimation at the proper step size.

仿真结果表明，选择合适的步长，算法误符号率性能基本接近理想估计的性能界。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。