Based on the structure of the KHN circuit, a new one to implement the second order current mode filters using modified CC ⅱ is presented.

A Design of Current-mode KHN Filter Based on AOA

基于AOA电流模式KHN滤波器的设计

A Current-Mode KHN Filter Based on CMOS OTA

基于CMOS OTA的电流模式KHN滤波器

It is a part, and a very important part, of the air defense of our country.

它是我国空防建设中的一部分，而且是非常重要的一部分。

The 3D air defense combat simulation system is realized. This system meets the requirements of simu-lation and interaction of federation and has the better running efficiency.

实现了三维虚拟空防作战仿真系统，满足视景仿真和联邦成员交互控制的功能需求，具有较好的运行效率。

Summary Design of Air-Defense Simulation System

空防对抗仿真系统概要设计

New method of war field situation assessment in air defense confrontation

空防对抗中战场态势综合评估的一种新方法

Methods for Evaluations of Naval Air-Defence Systems

评价海军空防系统的方法

Models of Comparative Superiority Evaluation for Offensive-defensive Confrontation Weapon Equipment

空防对抗武器装备对比优势评估模型

Its prevention measure mainly is to establish a modern defending strategy so as to build up strong air force;

其预防措施主要是制订现代空防战略，建立强大的空军；

The design of simulation scenario of missile and plane's countermine was improved for the simulation more realistically in this paper.

为使空防对抗仿真更接近实战，对仿真情景想定设计作了改进。

In both military and civilian fields, for instance, in air defense and in air traffic control, we all need tracking targets in a reliable and accurate mode.

在军事和民用领域譬如空防和空中交通管制中，需要可靠而精确的跟踪目标。

The Research on the Innovation of Civil Aviation Security System for Responding to the New Type of Terrorist Threats

应对新型恐怖威胁的民航空防安全体系革新研究

The Design of Simulation Scenario on Missile and Plane's Countermine

空防对抗仿真的情景想定设计

Consideration on Constructing the Safety Network of Air Defense in Shanghai

关于构建上海空防安全网络的设想

In the future war, the main missions of UCAV system are SEAD, deep strike and "air occupancy".

在未来战争中，无人战斗机系统的主要作战使命是空防压制、纵深打击和“空中占领”。

Focusing on the Key Links of Air Security

与时俱进抓好空防安全关键环节

The recent serious air disasters in the world make the situation of aviation security more critical.

最近，我国和世界各地连续多次严重的空难事件使空防安全的紧迫性显得尤为突出。

The authors say China will also aim to achieve air superiority by destroying or suppressing enemy ground-based air defense systems and air defense command systems.

作者说，中国也通过摧毁或者抑制敌军地空防御系统或者空防指挥系统来达成其空优态势。

The cabinet had panicked, and had convened a committee to study the problem of air defence.

内阁会议一片恐慌，决定设置一个委员会来研究空防。

Aiming at the present air defence intercept characters, the paper uses the HLA technology architecture to narrate in detail the development process of the ground-to-air missile intercept simulation system based on the mathematic models of the ground-to-air missile intercept.

针对当前空防对抗的主要特点，在地空导弹拦截的数学模型的基础上，利用HLA技术框架，详细地叙述了地空导弹拦截仿真系统的开发过程。