In addition to respecting contiguity, the classes in Rocchio classification must be approximate spheres with similar radii.
Cross-sectional area of cells and nuclei, which both approximate spheres, were measured from images by outlining the perimeter in the freely available ImageJ64 (http://rsbweb.nih.gov/ij/).
We used additive manufacturing (3D printing) to create ordered porous beds from a range of geometric shapes, including truncated icosahedra (approximating spheres), tetrahedral, octahedral, triangular bipyramid, and stellar octangular particles.
The closest analogy is a soccer ball with its 12 flat faces stitched to approximate a sphere.
Put all of them together and they should approximate a sphere.
Fluid-particle interactions are accounted for via Stokes' drag while inter-particle repulsions are modeled through approximate hard-sphere rejections.
In brief, this wavelet basis was based on the work by Schröder and Sweldens [ 23] which describes the construction of the spherical wavelets from multiple resolution mesh obtained via recursive subdivision of an icosahedron approximating a sphere.
In order to compute the PA pressure field from non-aggregating (NAG) and aggregating (AG) RBCs (approximated as spheres), the analytical solution for the time-independent wave equation for spheres was solved in the frequency domain [ 18].
The molecules are approximated as spheres, with a radius that exhibits fractal scaling with molecular weight.
Commonly, they are approximated as spheres or polyhedra in 3D cases, or further simplified as circles or polygons in 2D cases.
