the aim of this study preparation of the predicted soil maps by using kriging and inverse distance weighting methods in east rangeland of semnan. sampling was done within each unit of sampling parallel transects and 1 vertical transect with 750m length. soil samples were taken from 0-20 cm in starting and ending points of each transect. there were used kriging and inverse distance weighting met...

in this research, the spatial distribution of fe, cu, zn and mn on agricultural lands of golestan province were evaluated using different interpolation methods such as, kriging, inverse distance weighted, local polynomial, inverse multiquadric and radial basis function. thus, 505 soil samples were provided from fields during 2008 and micronutrients rates were measured for each sample. the perfo...

The standard F test for linear restrictions in regression is relevant as a criterion but fails to capture the notion of tradeoff between bias and variance. Average squared distance criteria yield operational tests that are more appropriate, depending upon objectives. In the present paper two alternative criteria are developed. The first allows testing of the hypothesis that the average squared ...

In [BEI] we introduced a Levy process on a hierarchical lattice which is four dimensional, in the sense that the Green’s function for the process equals 1 |x|2 . If the process is modified so as to be weakly self-repelling, it was shown that at the critical killing rate (mass-squared) βc, the Green’s function behaves like the free one. Now we analyze the end-to-end distance of the model and sho...

We consider the problem of approximating the unknown density u ∈ L2(Ω, λ) of a measure μ on Ω ⊂ Rn, absolutely continuous with respect to some given reference measure λ, from the only knowledge of finitely many moments of μ. Given d ∈ N and moments of order d, we provide a polynomial pd which minimizes the mean square error ∫ (u− p)2dλ over all polynomials p of degree at most d. If there is no ...

Accuracy of a novel fluoroscopy-based method of assessing patellar tracking was determined by comparing the pattern of patellar motion with respect to orientation (flexion, internal rotation, and lateral tilt) and translation (lateral, proximal, and anterior) with the pattern of patellar motion measured using Roentgen Stereophotogrammetric Analysis (RSA) in one cadaver knee specimen. Each pose ...