At present,frequent occurrence of cases of attacking police has brought about great harm to the society and police and it results from many causes which include reasons of the society,of the policemen themselves and public security organs and law system.

Study on Criminal Countermeasures for Cases of Assaulting Policeman;

Many scholars have made researches of assaulting police phenomenon according to data or from macroscopic perspective but still on the level of perceptual knowledge.

In order to solve the problem of the decreasing informing efficiency of air-raid alarming signals due to the effect of high buildings and noises in cities,the research paper has designed an air-raid alarming informing network to release air-raid defense signals utilizing public media such as broadcasting,television and telecommunications,and the technology has been well applied to practice.

With the gradually accelerating transformation of Chinese society,the more conspicuous social contradiction make the attacks on the police appear increasingly.