This paper presents a technique for modeling nonlinear distortion of multirate time-varying communication circuits. To properly consider the weakly nonlinear distortion effects in circuits with multiple large-signal excitations, we capture the quasiperiodic boundary condition of the system Volterra kernels using a multivariate formulation. We then extend the model order reduction work of [8][9]...

In this paper we consider several multivariate extensions of comonotonicity. We show that naive extensions do not enjoy some of the main properties of the univariate concept. In order to have these properties more structure is needed than in the univariate case. AMS 2000 Subject Classification: Primary 60E05, Secondary 90B06.

1 Nat-Bijection: Bijections between natural numbers and other types 13 1.1 Type nat × nat . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.2 Type nat + nat . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.3 Type int . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.4 Type nat list . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1.5 Finite sets of naturals...

The subject of allometry is variation in morphometric variables or other features of organisms associated with variation in size. Such variation can be produced by several biological phenomena, and three different levels of allometry are therefore distinguished: static allometry reflects individual variation within a population and age class, ontogenetic allometry is due to growth processes, an...

OBJECTIVE To assess risk factors for low height and students and working adolescents in cities of State of São Paulo, Brazil. METHODS A stratified sample, consisting of 50.0% of students from 5th grade to last year of high school, of State of São Paulo, Brazil, in 1999, was drawn from two largest schools of two different cities (urban and rural). A total of 756 individuals were studied. The h...

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When considering access to healthcare, the question of whether the provider is available and accessible must be answered before the question of cost. Most contemporary techniques of estimating the spatial accessibility of healthcare cannot simultaneously take into account transportation times and the spatially distributed service capacity of healthcare providers. This paper creates the Comprehe...

As the basic cryptographic structure for multivariate quadratic quasigroup (MQQ) scheme, MQQ has been one of the latest tools in designing MQ cryptosystem. There have been several construction methods for MQQs in the literature, however, the algorithm for judging whether quasigroups of any order are MQQs over Galois fields is still lacking. To this end, the objective of this paper is to establi...

The lecture addresses topics in multivariate approximation which have caught the author’s interest in the last ten years. These include: the approximation by functions with fewer variables, correct points for polynomial interpolation, the B(ernstein,-ézier, -arycentric)-form for polynomials and its use in understanding smooth piecewise polynomial (pp) functions, approximation order from spaces ...