The WE43 magnesium alloy was prepared by squeeze casting, and the influence of casting parameters on mechanical properties corrosion resistance studied compared with gravity casting. cast shows uneven grain size distribution, some grains even greater than 90 µm. While, is mainly distributed in 20–50 Mg12Nd2Y phase morphology changes from large lamellar to strips after whereas Mg24Y5 exhibits no...

We present a novel algorithm for visibility approximation that is substantially faster than ray casting based algorithms. The algorithm does not require extensive preprocessing or specialized hardware as most other algorithms do. We test this algorithm in several settings: rural, mountainous and urban areas, with different view ranges and grid cell sizes. By changing the size of the grid cells ...