Because each time according to the MST nature, the minimal amphibious margin is chosen from the original atlas to form the minimal produce trees and the process is quite complicated Now we can do it vise versa.

On the design of amphibious multipurpose environment friendly dredger;

In this paper, features of the command and control system of amphibious troops are dealt with first to establish an all-round index system for evaluating operation efficiency.

The prospect of developing a novel type of WIG,with high speed,fine seaworthiness,marvelous amphibious,and being able to fly in/beyond ground effect zone and softly land on ground,as well as maneuver in air (just like the Russian novel type of WIG,Экранолт “ИВОЛГА-2”),for both civil and military application is.

This paper begins with the basic meaning of the word "amphibian" commonly found in newspapers and magazines,and tries to explain its new meaning through people\'s metaphorical cognitive mechanisms.

The aquatic-speed is an important factor which always limits military amphibian to exert their capability.

But these two approaches all have the obvious flaw in the actual operation process, this paper proposes the smallest line approach of one new optimizing network route, this approach has overcome insufficiency of these two approaches in the certain degree.