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Rapid surface construction for rendering with on-demand precision is essential to 3D geographic information science (GIS). High accuracy surface modeling (HASM) method can construct surface with high accuracy. However, due to its slow speed, it can't be applied to 3D GIS and real-time rendering. To meet this goal, an efficient algorithm for HASM running on GPU has been presented. Fully utilizing the...
In this study, photogrammetry was used to estimate the PM10 concentration value in Lanzhou urban area. First, the CCD images were collected in a fixed position from a heating period in Lanzhou, that is, from November in 2009 to March 2010. At the same time, PM10 concentration was measured. Secondly, image eigenvaluess (definition) are calculated through eight methods. Thirdly, the relationship between...
A mathematic model for multi-objective bus route optimization based on the date of a bus corporation and limited conditions in the route network is developed on account of route optimization of bus dispatching. MAX-MIN Ant System is used to improve the global searching ability of ant colony algorithm and the improved algorithm is applied to solve the problem and its global optimization is obtained...
On account of route optimization of bus dispatching, it is proposed to use genetic ant algorithm (GAA) for solution. A mathematic model for multi-objective bus route optimization and selection under limited conditions is developed, introducing the evolutionary process of genetic variation to improve the optimization of ant colony algorithm and also the optimal decision updating and identification...
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