We investigate the problem of localizing multiple targets using a single set measurements from network radar sensors. Such "single snapshot imaging" provides timely situational awareness, but can utilize neither platform motion, as in synthetic aperture radar, nor track across time, Kalman filtering and its variants. Associating with becomes fundamental bottleneck this setting. In paper, we pre...

This paper aims to propose a topology optimization method on generating porous structures comprising multiple materials. The mathematical formulation is established under the constraints of individual volume fraction constituent phase or total mass, as well local all phases. original problem with numerous converted into box-constrained by incorporating augmented Lagrangian function, avoiding pa...

Web Feature Service (WFS) is a widely used spatial web service standard issued by the Open Geospatial Consortium (OGC). In a heterogeneous GIS application, a user can issue a query that relates two or more spatial datasets at different WFS servers. Multi-way spatial joins of WFSs are very expensive in terms of computation and transmission because of the time-consuming interactions between the s...

Spatial data is information that is defined spatially (in location) by four dimensions (geometry and time) related to the earth (Grooth and McLaughlin, 2003). With the advancement of technology, most decision makers from many disciplines tend to rely on up-to-date accurate and accessible spatial data to support their operational and strategic decisions. The demand to access multi-organization s...