Coal quality-tonnage curves are helpful tools in optimum mine planning and can be estimated using geostatistical simulation methods. In the presence of spatially cross-correlated variables, traditional co-simulation methods are impractical and time consuming. This paper investigates a factor simulation approach based on minimization of spatial cross-correlations with the objective of modeling s...

Spatial variables in the geosciences often display different patterns of variability at different spatial scales. When these variables are cross-correlated, the magnitude of the cross-correlation may differ at the different scales of spatial variability. This scale-dependent spatial variability and cross-correlation can be investigated by geostatistical factor analysis, which consists of four s...

Let p be an odd prime and n = 2m with p ≡ 1 (mod 4). In this paper, the cross-correlation distribution between two decimated sequences of a p-ary m-sequence, s(2t+ i) with i ∈ {0, 1} and s(d′t) with d′ = 2d, d = ( p +1 2 ) is determined.

The present paper proposes two methods for constructing new asymmetric ZCZ sequence sets. ZCZ sequence sets are used as spreading sequences for AS-CDMA systems. An asymmetric ZCZ sequence set is a type of ZCZ sequence set and consists of multiple sequence subsets. Compared with conventional ZCZ sequence sets, the most important property of the proposed asymmetric ZCZ sequence sets is that the c...

Since its launch on October 2002 the INTEGRAL satellite is performing an deep survey of the hard X–ray sky with unprecedented sensitivity and positional accuracy. This allowed pinpointing, through positional cross-correlation with catalogs at longer wavelengths, possible optical/near-infrared candidates for the hard X–ray sources of still unknown nature. In this presentation I will describe thi...

Several results have been reported in the literature on the performance of various diversity combining schemes for wireless communications systems. Typically for convenience it is assumed that the signal envelopes in the diversity branches are uncorrelated with one another. However, in practice the envelopes will be correlated. In this paper a procedure to generate two equal power Rayleigh fadi...

By studying cross correlations in the intensity of light scattered by a fluid sample in different directions at different times, it is possible to measure the dynamic scattering function S(k,t) for the fluid. The multiple scattering contribution to the time-dependent cross correlations is very substantially less than the multiple scattering contribution to S(k,t) as obtained by a conventional s...

Industrial process signals do affect one other. However, causal dependencies, or correlation, and thereby consequences of control actions cannot always be understood by the operator, which may lead to accidents. Models explain dependencies and are mostly built on process knowledge and blueprints, while causalities are visible in the measurements and ought to be used to increase process understa...