DFA: dynamic frame fragmentation and aggregation for 802.11-based wireless networks;

This paper described the implications,criteria,types and significance in the application of data fragmentation in the design of database.

Traditional IP datagram fragmentation and multicast technology have restrained from data process ability of the processor (network processor (NP) especially), because it needs to copy lots of data many times of the datagram and results in a large amount of I/O operations to the buffer memory.

Parallel query processing is one of promising approaches to solving the bottleneck and data partitioning is one of key issues of the par.

According to the construction features of computer graphical information, free-form surface is divided into partition group of surface information and technology information same or similitude and similar surfaces partition group are polished by same tool or similitude technological parameter.

Based on the recent 20 years of fieldworks and studies on Jiaoliao Mandarin,this paper gives an independent map for this dialect from the original three maps of MandarinⅠtoⅢin Languages Atlas of China,with supplements and corrections of the dusters as well as a new introduction of the phonological features of each cluster.

Research on Subdivision Polishing and Trajectory Planning of Free-Form Surfaces;