Computers--Non-numerical computation

Computers and Computation

Concepts for numerical optical computers

1. Background 2. Residue number system 2.1. Encoding 2.2. Decoding 2.3. Scaling 3. Basis for numerical methods 4. Processor design concepts 4.1. Cyclic phase implementation 4.2. Mapping with beam position control 4.3. Multipurpose arithmetic module 5. Extended computing applications 5.1. Polynomial evaluation 5.2. Matrix multiplication and transforms 6. Concluding remarks 7. References Abstract...

Fdtd Computation for Large-scaled Numerical Dosimetry on Parallel Personal Computers

1. Introduction Since it is very difficult to quantify microwave absorption directly in a living human, dosimetry is forced to rely mainly on computer simulation with high-resolution numerical human models obtained from magnetic-resonance imaging (MRI) or computed tomography (CT) scans. The Finite-Difference Time-Domain (FDTD) method [1] is currently the most widely accepted means for the numer...

Numerical Computation of Discrete Differential Operators on Non-Uniform Grids

In this paper, we explore the numerical approximation of discrete differential operators on nonuniform grids. The Voronoi cell and the notion of natural neighbors are used to approximate the Laplacian and the gradient operator on irregular grids. The underlying weight measure used in the numerical computations is the Laplace weight function, which has been previously adopted in meshless Galerki...

Computers and Computation in Cognitive Science

Digital computers play a special role in cognitive science—they may actually be instances of the phenomenon they are being used to model. This paper surveys some of the main issues involved in understanding the relationship between digital computers and cognition. It sketches the role of digital computers within orthodox computational cognitive science, in the light of a recently emerging alter...