Global optimization of cerebral cortex layout

Global optimization of cerebral cortex layout.

Functional areas of mammalian cerebral cortex seem positioned to minimize costs of their interconnections, down to a best-in-a-billion optimality level. The optimization problem here, originating in microcircuit design, is: Given connections among components, what is the physical placement of the components on a surface that minimizes total length of connections? Because of unfeasibility of mea...

Biological Sciences: Neuroscience GLOBAL OPTIMIZATION OF CEREBRAL CORTEX LAYOUT

Global Layout Optimization of Olfactory Cortex and of Amygdala of Rat

Principles of connection minimization in the nervous system apply not only to complete neural systems but also to smaller subsystems such as rat olfactory cortex and rat amygdala. These subsystems have a three-dimensional organization, rather than previously-studied two-dimensional and one-dimensional schemes. Nonetheless, wire-cost savings show optimality at similar levels, suggesting neural o...

An algorithm of global optimization for solving layout problems

The two-dimensional layout problem is known to be NP-complete, and the current research work is basically in the heuristic way. In this paper, we mainly discuss the methods for solving layout problem about the arti®cial satellite module by virtue of graph theory and group theory. Also, an algorithm of global optimization is presented ®rst time. The method given here can be extended to solve oth...

Layout-driven Logic Optimization

With the advent of deep sub-microntechnologies,interconnectloads and delays are becoming dominant. Consequently, the currently used design ow of iterativelyperforming logic synthesis with statistical wire-load models, doing placement & routing, extracting par-asitics, and using them back in the synthesis tool runs into serious timing convergence problems. Layout-driven synthesis has become the ...