The problem of state dimension reduction and quantizer design under communication constraints is discussed for state estimation in quantized linear systems. Subject to the limited signal power, number and bandwidth of the parallel channels, a differential pulse code modulation (DPCM)-like structure is adopted to generate the quantized innovations as the transmitted signals, and the multi-level ...

Two important and upcoming technologies, microgrids and electricity generation from wind resources, are increasingly being combined. Various control strategies can be implemented, and droop control provides a simple option without requiring communication between microgrid components. Eliminating the single source of potential failure around the communication system is especially important in re...

 In this paper, a new homological dimension of modules, copresented dimension, is defined. We study some basic properties of this homological dimension. Some ring extensions are considered, too. For instance, we prove that if $Sgeq R$ is a finite normalizing extension and $S_R$ is a projective module, then for each right $S$-module $M_S$, the copresented dimension of $M_S$ does not exceed the c...

In this paper we describe the data access features of Cω, an experimental programming language based on C currently under development at Microsoft Research. Cω targets distributed, data-intensive applications and accordingly extends C’s support of both data and control. In the data dimension it provides a type-theoretic integration of the three prevalent data models, namely the object, relation...

Computer mediated communication (CMC), a central feature of cyberspace, is also a key resource for the creation of innovative technology-based educational environments. However, the real significance of these environments for education is still unclear. Our aim in this paper is to propose a particular educational configuration based on CMC technology, the Learnet, based on the combination of th...

Dimensions and tolerances are critical engineering design information for defining shape requirements of manufactured parts. As technologies for new design analysis and manufacturing planning are being developed, they must be seamlessly integrated into a computer aided product development environment. A data model is an effective technique to define the shareable semantics that are essential to...

We consider completely invariant subsets A of weakly expanding piecewise monotonic transformations T on [0, 1]. It is shown that the upper box dimension of A is bounded by the minimum tA of all parameters t for which a t-conformal measure with support A exists. In particular, this implies equality of box dimension and Hausdorff dimension of A.