WorldCat Identities

Zhang, Yanyan (1971-....).

Works: 3 works in 5 publications in 3 languages and 7 library holdings
Genres: Academic theses 
Roles: Author
Publication Timeline
Most widely held works by Yanyan Zhang
Régulation de l'expression et la fonction de CXCR4 dans les progéniteurs hématopoïétiques humains normaux by Yanyan Zhang( Book )

in French and held by 4 WorldCat member libraries worldwide

A Modified Douglas-Peucker simplification algorithm : a consistent displacement line simplification by Yanyan Zhang( )

2 editions published in 1996 in English and held by 2 WorldCat member libraries worldwide

Displacement consistency has remained a challenging problem in line simplification. Though it is often considered the best line simplification algorithm, the Douglas-Peucker algorithm, however, like most line simplification algorithms, does not take into account displacement consistency. Assume there is a chain c with n vertices, a point set P with m points scattering along the two sides of c and also there are other chains lying beside chain c. A line simplification algorithm is said to have displacement consistency for c only if each of the points in P and each of the vertices in other chains remains on the same side of the simplified c after applying the algorithm. n this thesis, the Douglas-Peucker algorithm is modified to achieve displacement consistency. The key point of the modification is: checking will be done for all the points and vertices that will potentially interfere with the simplified chain before each vertex elimination, and guarantee simplification only happens when it is safe. There are two method given for choosing "characteristic" vertex after encountering unsafe points
Jin xian dai gang qin jiao xue li lun fen xi yu yan jiu by Yanyan Zhang( Book )

1 edition published in 2019 in Chinese and held by 1 WorldCat member library worldwide

Ben shu gong fen wei 6 zhang,Nei rong bao kuo:jin xian dai gang qin yi shu de fa zhan,Gang qin yi shu de qi meng,Gang qin jiao xue guo cheng he ke tang jiao xue,Gang qin jiao xue ji hua yu jiao cai de da pei deng
Audience Level
Audience Level
  General Special  
Audience level: 0.88 (from 0.72 for Jin xian d ... to 0.95 for Jin xian d ...)