Now showing items 21-30 of 319
A robust finite element method for Darcy-Stokes flow
Finite element methods for a family of systems of singular perturbation problems of a saddle point structure are discussed. The system is approximately a linear Stokes problem when the perturbation parameter is large, while ...
Bidirectional branch and bound for controlled variable selection Part II : exact local method for self-optimizing control
The selection of controlled variables (CVs) from available measurements through enumeration of all possible alternatives is computationally forbidding for large-dimensional problems. In Part I of this work, we proposed a ...
Achievable PID performance using sums of squares programming
In addition to process elements like time delay, the PID structure of the controller can pose fundamental limitations on the achievable control performance. A key difficulty in characterizing the limitations due to controller ...
Neurotrophins : more than Neurotrophic
The Nerve Growth Factor (NGF) is the prototypic member of the neurotrophin (NT) family, which plays an essential role in the development and functioning of the vertebrate nervous system. Although originally defined by their ...
A survey of algebraic unitary codes
This survey paper gives an overview of algebraic unitary codes. It describes the coding problem involved, and present several algebraic approaches yielding interesting constructions, as well as the latest bounds.
Constructions of relative difference sets with classical parameters and circulant weighing matrices
In this paper, a new family of relative difference sets with parameters (m,n,k,λ)=((q^7-1)/(q-1), 4(q-1), q^6, q^5/4) is constructed where q is a 2-power. The construction is based on the technique used in . By ...
The sizes of optimal q-ary codes of weight three and distance four : a complete solution
This correspondence introduces two new constructive techniques to complete the determination of the sizes of optimal q-ary codes of constant weight three and distance four.
Improved lower bounds for constant GC-content DNA codes
The design of large libraries of oligonucleotides having constant GC-content and satisfying Hamming distance constraints between oligonucleotides and their Watson-Crick complements is important in reducing hybridization ...
Kagome antiferromagnet : a Schwinger-boson mean-field theory study
The Heisenberg antiferromagnet on the kagome lattice is studied in the framework of Schwinger-boson mean-field theory. Two solutions with different symmetries are presented. One solution gives ...
Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass
Several experiments indicate that there are atomic tunneling defects in plastically deformed metals. How this is possible has not been clear, given the large mass of the metal atoms. Using a classical molecular-dynamics ...