A new method of star image high precision extraction besed on local entropy;

Subdivided locating method of star image for star sensor;

Track acquisition method of dim target in star images of moving background;

This paper first shows that in an n-dimensional star graph Sn where n≥3,for each vertices SV(Sn),|S|=n-1,if Sn-S is disconnected,there exists a vertex v∈V(Sn) such that N(v)=S.

In this paper,the star total chromatic numbers of general Mycielski′s graphs of star graphs and fan graphs are searched at the different situations,and obtained the star total chromatic numbers of them.

This paper think the Chinese ancient anstronomer did not use the western projective in the course of drawing star map,on the contrany,they have their own personality methods.

This paper presents the work of observing stars in the course of reforming calendar in Chong Zhen period at the end of Ming Dynasty,and preliminarily researches into the star catalogues and star maps arising therefrom.

From the above,the thesis made an attempt to prove the importance of China ethnic groups in the development of Star maps.