Since Mobile Ad Hoc NETwork (MANET) has imbalance of high throughput but low fairness, a novel Medium Access Control (MAC) protocol named MAC-FT was proposed. Firstly, two expressions were deduced and focus on relationship of optimal throughput and nodes' number, and relationship of idle slot probability and nodes' number. On the basis of this, idle slot probability model was developed, whose feasibility and stability were proved based on Lyapunov drift. Secondly, idle slot probability computation was implemented through Auto-Regressive and Moving Average (ARMA) model filter scheme and its dynamics was controlled by Proportional Integral Controller (PIC) model. Finally, performance of MAC-FT was analyzed synthetically. Results show that, fairness index and throughput reached to 0.98 and 6.15 Mb/s respectively, which were similar to optimal value 1 and 5.85 Mb/s. Therefore, performance of MAC-FT is better than Asymptotically Optimal Backoff (AOB), Idle Sense (IS), Distribution Coordination Function (DCF), and Gentle DCF (GDCF), and it improves balance of throughput and fairness.

In practice terms, it is impossible to avoid a great deal of spatial data processing when publishing with SVG document through Internet. Therefore, it not only slows down the executing speed but also expend too much the resource of computer system when searching the spatial data in SVG document. It was proposed to store the SVG document into ORDBMS, and to use the extended SQL (SQL3/SQL99) to make searching. At the same time, another storing and searching method based on native XML database (NXD) was also executed, using XQuery language for searching approach. The results show that both of SVG searching methods of database are very efficient and take less system resources than publishing the document directly on client side.