To remove dissymmetry of the movement of monitor image under some conditions when image guided missile adopting guided search,two factors causing this dissymmetry are found,viz,the angular velocity of line of sight and the lead speed of the missile.

For an image guided missile,adopting guided search can increase the probability of target entering the instantaneous field of view of the seeker,but it may cause dissymmetry of the monitor image under some conditions.

To remove the dissymmetry of horizontal movement speed of monitor image caused by image guided missile adopting guided search and the search law with one-dimension visual effect,pitching and yawing signals of the search law with one-dimension visual effect are designed again under the condition of ensuring no blind area and only horizontal movement of monitor image.

According to the failure mode and shape of slip surface of soil slope and based on limit equilibrium theory,a new searching model was put forward to determine the critical slip surface of soil slope.

Information searching model is the core of modern information searching system .

Based on the model,it researches searching model and its algorithm of special resource,provides monitoring architecture of P2P network,and solves the problem of monitoring special resources of network.