The amount of investment in marine environmental governance (MEG) is growing fast China, which brought the prosperity treatment entities (e.g., water enterprises and port pollution control institutions). Based on spatial big data, this paper adopted kernel density method, standard deviational ellipse, nearest neighbor index to explore distribution pattern MEG Shanghai from 2005 2021. Several co...

An elliptical region of the plane supports a positive-valued function whose Radon transform depends only on the slope of the integrating line. Any two parallel lines that intersect the ellipse generate equal line integrals of the function. We prove that this peculiar property is unique to the ellipse; no other convex, compact region of the plane supports a nonzero-valued function whose Radon tr...

Dear Editor: I would like to congratulate the authors for the article regarding the calculation of the so-called ellipse area [1]. As the authors indicated, the algorithms employed to calculate the area of the 95% prediction ellipse using the chi-square or the Rayleigh distribution are in fact only exact when the number of samples of the bivariate variable tends to infinite (when each univariat...

We deduce some approximate formulas for the distance evaluation problem between a point and an ellipse in IR2 and a point and an ellipsoid in IR3. The proposed approach is based on the analytical representation of the distance function as a zero of an appropriate univariate algebraic equation. Key–Words: Distance, point-to-ellipse, point-to-ellipsoid

In this paper, we describe a new approach for estimating and tracking three-dimensional (3D) pose of a human face from the face images obtained from a single monocular view with full perspective projection. We assume that the shape of a 3D face can be approximated by an ellipse and that the aspect ratio of 3D face ellipse is given. Given a monocular image of a face, we ®rst perform an ellipse d...

The establishment of appropriate connectivity in the developing nervous system depends on many molecular guidance cues. A key method for studying the response of nerve fibers to such guidance cues is to culture explants of neural tissue in three-dimensional collagen gels. However, most previous analyses of the neurite outgrowth patterns from these explants have been very simple, often measuring...