To evaluate the security of network information systems and perform active defense,this paper presents some models including defense graph model,attack-defense taxonomy and cost quantitative method,and Attack-Defense Game(ADG) model.

Content of mountain flood prevention preparation plan;

Practice of mountain flood prevention in Changqingxi Watershed in Fujian Province;

Establishment of mountain flood prevention warning and monitoring system in Loudi City;

Psychological warfare in modern age: more attention to be paid to defense and application;

Anti-ballistic missile defense radar and ballistic missile penetration;

Information-obtained systems of ballistic missile defense;

The principle and defending of DDoS attack;

Aggression mode and defend strategy of network;

The article analyzes the frangibility of the network safety and the way of the network attack,emphasis researching the attack course of the network and the characteristic,strategy and course of the network defend.

Research on the Defence Strategy for Marine Disasters in Chinese Cities in the 21st Century;

In view of the feature of modern defence system against air target, the paper simply introduces the cruise missile and its guidance model, and in different ways analyzes the cruise missile’s possibility of antagonism, and advances the idea that the cruise missile can be antagonized, especially when using electro-optic.

The integrated defence system for the important targets on the sea is composed of multilayer interceptors and soft defence means.

Discussion on the principle and recovery of SQL injection attack;

Buffer Overflow Attack: Theory, Recovery and Detection;

Though the analysis of weather characteristics and the agriculture disasters,some advice and measure were brought forward for the agriculture recovery.