The prominent factors supporting a richer spider community are structural and floral diversity of habitats, field margin width, reduction of mechanic disturbances, and margin density within the landscape.
The corresponding Copula probability density function (PDF) is defined as follows: begin{aligned} f(x_{1},x_{2}, ldots,x_{n} ) & = c_{1,2, cdots,n} (F(x_{1} ),F(x_{2} ), ldots,F(x_{n} )) & quad cdot f(x_{1} )f(x_{2} ) ldots f(x_{n} ) end{aligned} (2 where f (x i ) is the margin density function; f(x 1, x 2,…, x n ) is the joint PDF; c is the Copula density function.
According to the criteria established by the American College of Radiology's Breast Imaging Reporting and Data System (BI-RADS) [7], the following mammographic features were analyzed: parenchymal patterns, mass characteristics (shape, margin, density, size, and location), presence and type of microcalcifications, associated architectural distortion, and skin changes.
The proposed methodology overcomes the limitations of the previously developed least-square based estimation technique which relies on the Gaussian approximation of the flutter margin probability density function (pdf).
P x) and P y) are the margin probabilistic density functions of x and y, respectively.
We evaluated the number of lesions, their Mx features and classified the lesions with respect to: microcalcifications (elements, distribution, and number), mass lesions (shape, margin, and density), microcalcifications in a mass, architectural distortions and focal asymmetry of glandular tissue.
Lesions we regard as likely to be benign have the following characteristics on screening mammograms: sharp margins, low density (but higher than the density of fat), smoothly rounded contours and usually solitary.
However, not all species distributions follow this "abundant center" pattern, with many showing higher densities towards a range margin, or heterogeneous densities throughout the range5,6,7.
Readers described each lesion by selecting a single term from the BI-RADS lexicon for each of eight morphologic categories: calcification distribution, number, and description; mass margin, shape, and density; associated findings; and special cases.
Near the tumor margin, the nuclear density exhibited the characteristic increase associated with neoplastic progression (Figure 4 (B)).
In this paper, we present results from three experiments that examine whether the nutrient content of lupin leaves may explain differences in larval abundance between high-density core areas and low-density margin and matrix areas.
