Firstly, the paper introduces technologys relating to the topic, and gives a thorougly overview of network hacking methods and defending ways; then analyses the application mechanism of SED firewall抯 TCP/IP protocol suite; and e~cpatiates at length on the ideas and methods of how to design and implement a packet filter after discussing these basic topic.
首先，本文陈述了相关技术基础，着重分析了常见网络攻击手段和防范方法；然后，深入地讨论和分析了SED FW-2000防火墙TCP/IP协议栈的实现细节；最后，在了解这些相关技术的基础上，详细阐述了包过滤器设计和实现的思想和方法。
The basic principle of image enhancement of linearity gray transform based on removing redundance gray and Butterworth high-pass filter based on the Fourier transform is analyzed, and their realization methods in image enhancement are discussed, their respective advantages are indicated.
分析了去灰度冗余的线性灰度变换与基于傅里叶变换的巴特沃斯高通滤波图像增强的基本原理，讨论了它们在图像增强中的实现方法，指出了各自的优点。
Introduction was made to the design method of digital filter based on window function, basic concept and category, co- mparing the performances of band-stop filter with rectangle window and Hamming window, giving out simulation results.
介绍了基于窗函数的数字滤波器设计方法、基本概念及分类，比较了施加矩形窗和海明窗的带阻滤波器的性能，给出了仿真结果。
A program for the design of Butterworth low-pass digital filter based on the requirement of the application has been given with BASIC language.
并根据所得的有关公式，用BASIC语言编制了根据设计要求用计算机设计Butterworh低通数字滤波器并能算出其频响特性的程序。
With the integrated navigation system which is applicable to the guide of common artillery rocket as background, based on the research of basic theory of integrated navigation system and modern navigation system, contraposing the characteristic of the guided artillery rocket, a information fusion processing technique which is on based of Kalman filter is given, a new embedded integrated INS/GPS scheme which realized by using DSP is presented and the realization of interface system of integrated INS/GPS is emphatically studied.
本文主要以适用于常规火箭弹制导化的组合导航系统为背景，在综合研究现代导航系统性能以及组合导航系统基本理论的基础上，针对火箭弹制导化的特点研究了易于工程实现的基于卡尔曼滤波的组合导航系统信息融合技术，提出了一种利用DSP实现的嵌入式INS/GPS组合导航系统方案并重点研究了组合导航系统接口子系统的软、硬件实现。
Understanding of spatial filter the basic principles a...
理解空域滤波的基本原理及方法； 3。
The program compile with BASIC language and O'NILLs filter coefficient can be used for forward calculation with the gived model. with the input of the observed data and the assumeed model, one can obtain the observed curve and calcula- ted curve in the Same dual logarithm coordinate.
该程序是根据 ONILL 的滤波系数，利用BASIC 语言编制的。它根据给定的地层模型可作正演计算。输入野外观测值以及所假设的地层模型便可在同一个双对数座标中绘出观测曲线和计算的曲线。
This paper introduces the basic methods for designing the low-pass filter, taking Butterworth filter as an example.
文章以巴特沃思滤波器为例介绍低通滤波器的基本设计方法。
The basic raw material for Drache`s Cerazirk filter is Zirconium oxide, ZrO2 Drache uses a partialy Mg-stablllzed ZrO2 in combination with a Zirconium-based binder system.
德国卓凯陶瓷泡沫过滤器广泛应用于机械、军工、航海和航天工业高精密铸造等行业，如铸钢、钢合金、钴基及镍基合金，铝镁合金。
The design method for basic passive filters is discussed with emphasis on the design of a 2 and 3 order passive low-pass filter. Simulations of a loop filter designed using this method show good results in a practical phase-locked loop realization.
文章讨论了基本二阶无源滤波器的设计方法，并推广到三阶无源滤波器的情况，同时给出了采用这种方法设计的电荷泵锁相环的仿真结果。
Therefore, the filter design of digital signal processing is the basic problem.
因此，滤波器的设计问题也是数字信号处理中的基本问题。
On the static base, the error model and measurement model were deduced in detail according to the basic principle of the SINS and the alignment; the observability of the system was analyzed by the PWCS theory; the system performance influenced by the inertial sensor errors was simulated and analyzed; the estimation method of the orientation error was improved and simulated to overcome the disadvantage of the one-order digital filter.
在静基座上，本文从捷联惯导系统初始对准的基本原理出发，推导了捷联惯性导航系统静基座初始对准的误差动态方程和量测方程；并采用PWCS理论对该系统进行了可观测性分析；仿真分析了惯性元件误差对系统误差估计的影响；针对一阶数字滤波器精对准方法的缺点，改进了方位角的误差估计方法，并给出仿真结果。
So it is widely used. Traditionarily, BP algorithm based on grads descending and extended Kalman filter algorithm are used to Basic Elman network's training.
基本Elman网络的传统学习训练方法有基于梯度下降的BP算法和扩展Kalman滤波算法等。
Understanding of spatial filter the basic princi...
理解空域滤波的基本原理及方法； 3。
Most of the modern fridges in the market have basic features like chiller drawer, glass shelves, water dispenser, water filter, lock facility and interior light.
大多现代冰箱在市场上有象更加寒冷的抽屉、玻璃架子、水分配器、滤水器、锁设施和内部光的基本的特点。
The paper has talked about the basic theory of oscillator and finished the design and test of the parallel coupling the bandpass filter.
本文讨论了滤波器的基本原理，完成了平行耦合微带带通滤波器的设计和测试。
This thesis introduces some basic knowledge on the Windows Driver Model, explained the theory and application of Filter Driver in details, and analyzes the method of encrypt data using File System Filter Driver.
本文介绍了关于Windows驱动模型的基本知识，对过滤驱动的原理与应用进行了详细的阐述，并结合文件系统分析了如何利用文件过滤驱动实现对数据的加密。
Research the basic theory of digital filter and the method of realize of digital filer.
1研究了数字滤波器的基本理论，以及数字滤波器的实现方法。
Research the basic theory of digital filter and the method ofrealize of digital filer.
1研究了数字滤波器的基本理论，以及数字滤波器的实现方法。
Taking the harmonic attenuation and reactive power compensation of the power distribution network at Jiangxi copper company as the object of study, this thesis studies modeling, control and equipment of Active Power Filter, based on basic principle of APF. This research prepare theory and technological knowledge for its universal application in our country, and accumulate experiences for its high-voltage and high-power application.
本论文以江西某铜箔厂的谐波治理和无功补偿为研究对象，从有源电力滤波器APF的基本原理出发，对有源电力滤波器的建模、控制和装置研制等三个方面进行了详细的研究，为高压、大功率有源电力滤波器在国内的早日普及应用积累经验、奠定理论和技术基础。