The problem of quantizing a circularly-symmetric complex Gaussian random variable is considered. For this purpose, we design two non-uniform quantizers, a high-rate-, and a Lloyd-Max-, quantizer that are both based on the (golden angle) spiral-phyllotaxis packing principle. We find that the proposed schemes have lower mean-square error distortion compared to (non)-uniform polar/rectangular-quan...

Three-dimensional periodic complex structures are encountered in various soft matter systems such as liquid crystals, block-copolymer phases and the related nano-structured materials. Here, we review several well-defined topologies: two-dimensional hexagonal phase, three-dimensional packing of spheres, tetrahedral close packing (tcp) bi-continuous and tri-continuous cubic phases. We illustrate ...

In this paper, the effects of container size on the porosity of random loose packing of mono size particles have been investigated using an Event Dynamics (ED) based model. Simultaneous effects of square container walls on particles packing and their order are also investigated. Our simulation results indicate higher container size will increase the total packing factor and high density regions...

Additive manufacturing is a promising tool for tailored solutions in chemical engineering. This applies particular to the design of lab-scale packed bed columns. We present experimental results characterize 3D printed structured metal packing and compare it conventional counterpart. The indicate that necessary adjustments process material have an influence on important operating parameters, res...

Structured packings are widely used in distillation columns to separate various types of mixtures. These have an ordered structure, which ensures more uniform conditions for interaction counter-current flows liquid and vapor than the random a small hydraulic resistance. Nevertheless, with diameter 0.5 m, formation large-scale non-uniformity distribution flow parameters over packing cross-sectio...