4,962 research outputs found
FIGURE 1. Tripogon tirumalae habit, from L. Rasingam, M.S. Rao & Alok Chorghe 2914 in Tripogon tirumalae (Poaceae), a new species from the Seshachalam hills of Andhra Pradesh, India
No full textFIGURE 1. Tripogon tirumalae habit, from L. Rasingam, M.S. Rao & Alok Chorghe 2914.Published as part of Chorghe, Alok, Rasingam, L., Prasanna, P. V. & Rao, M. Sankara, 2013, Tripogon tirumalae (Poaceae), a new species from the Seshachalam hills of Andhra Pradesh, India, pp. 17-22 in Phytotaxa 131 (1) on page 18, DOI: 10.11646/phytotaxa.131.1.3, http://zenodo.org/record/508582
Application of the Fisher-Rao metric to ellipse detection
No full textThe parameter space for the ellipses in a two dimensional image is a five dimensional manifold, where each point of the manifold corresponds to an ellipse in the image. The parameter space becomes a Riemannian manifold under a Fisher-Rao metric, which is derived from a Gaussian model for the blurring of ellipses in the image. Two points in the parameter space are close together under the Fisher-Rao metric if the corresponding ellipses are close together in the image. The Fisher-Rao metric is accurately approximated by a simpler metric under the assumption that the blurring is small compared with the sizes of the ellipses under consideration. It is shown that the parameter space for the ellipses in the image has a finite volume under the approximation to the Fisher-Rao metric. As a consequence the parameter space can be replaced, for the purpose of ellipse detection, by a finite set of points sampled from it. An efficient algorithm for sampling the parameter space is described. The algorithm uses the fact that the approximating metric is flat, and therefore locally Euclidean, on each three dimensional family of ellipses with a fixed orientation and a fixed eccentricity. Once the sample points have been obtained, ellipses are detected in a given image by checking each sample point in turn to see if the corresponding ellipse is supported by the nearby image pixel values. The resulting algorithm for ellipse detection is implemented. A multiresolution version of the algorithm is also implemented. The experimental results suggest that ellipses can be reliably detected in a given low resolution image and that the number of false detections
can be reduced using the multiresolution algorithm
R.s. Khare & M.s. A. Rao, Aspects in South Asian Food Systems. Food, Society and Culture
No full textMahias Marie-Claude. R.s. Khare & M.s. A. Rao, Aspects in South Asian Food Systems. Food, Society and Culture. In: L'Homme, 1987, tome 27 n°104. pp. 143-146
John M. Fritz, George Michell, M.S. Nagaraja Rao Where Kings and Gods meet, The Royal Centre at Vijayanagara, India
No full textFilliozat Vasundharâ. John M. Fritz, George Michell, M.S. Nagaraja Rao Where Kings and Gods meet, The Royal Centre at Vijayanagara, India . In: Arts asiatiques, tome 41, 1986. pp. 127-128
Narayanella, a new name for Narayana Subba Rao (hymenoptera : mymaridae)
No full textThe name Narayana was applied (Subba Rao, 1976) to a genus erected for the new species N. pilipes reared from the gaUs of Lagerstoemia flos reginae. Unfortunately the author overlooked the vulid and prior use of Narayana by Distant (1908). Narayana Distant was erected with rusticitatus as type-species (Issidae: Homoptera). Hence Narayana Subba Rao is a junior homonym which has to be replaced according to the rules of the International Zoological Nomenclature
John M. Fritz, George Michell, M.S. Nagaraja Rao Where Kings and Gods meet, The Royal Centre at Vijayanagara, India
No full textFilliozat Vasundharâ. John M. Fritz, George Michell, M.S. Nagaraja Rao Where Kings and Gods meet, The Royal Centre at Vijayanagara, India . In: Arts asiatiques, tome 41, 1986. pp. 127-128
Visual tracking of multiple interacting objects through Rao-Blackwellized data association particle filtering
No full textA multiple object visual tracking framework is presented, which is able to manage complex object interactions, missing detections and clutter. The main contribution is the ability to deal with complex situations in which the interacting objects can change their dynamics while they are occluded. This is achieved by explicitly estimating putative locations of the occluded objects. The tracking is modeled by a Rao-Blackwellized Data Association Particle Filter (RBDAPF), which has a tractable substructure that allows to analytically compute the object positions, while the object-measurement associations are approximated by Particle Filtering. Besides improving the accuracy, this filter decomposition reduces the computational cost, since the complexity with the number of objects becomes linear instead of exponential. The Particle Filter efficiently manages the measurements from visible and occluded objects, the clutter, and missing measurements to estimate the correct data associations that lead to a robust tracking. Experimental results on surveillance videos show that the proposed RBDAPF framework is able to track multiple interacting objects in complex situations
Sensor Selection for Angle of Arrival Estimation Based on the Two-Target Cramér-Rao Bound
No full textSensor selection is a useful method to help reduce data throughput, as well as computational, power, and hardware requirements, while still maintaining acceptable performance. Although minimizing the Cramér-Rao bound has been adopted previously for sparse sensing, it did not consider multiple targets and unknown source models. In this work, we propose to tackle the sensor selection problem for angle of arrival estimation using the worst-case Cramér-Rao bound of two uncorrelated sources. To do so, we cast the problem as a convex semi-definite program and retrieve the binary selection by randomized rounding. Through numerical examples related to a linear array, we illustrate the proposed method and show that it leads to the natural selection of elements at the edges plus the center of the linear array. This contrasts with the typical solutions obtained from minimizing the single-target Cramér-Rao bound.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
Acoustic transmission through fluid-filled pipes in boreholes
No full textThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.by Rama Rao V.N.M.S
Sketch Studies and Lu Yen’s Harmony
No full textThis paper introduces the various types of music manuscripts and current issues in music sketch studies. It argues that the study of musical manuscripts is not simply the direct conversion of composition processes into music analysis. Nor is it limited to the function of providing a basis for choosing performance editions. Rather, it allows the researchers to weigh and ponder on many entangled issues, such as the composer's intentions, musical influences and music trends, composition habits, manuscripts chronology order, revisions to the draft, and traces of pre-composition plans. In addition, manuscripts could be situated in the network of various cultural or historical moments, and of a variety of musical styles and trends. It can be linked to a large web of associations contributing in different ways to the production of the manuscripts. Manuscripts are deeply rooted in historical processes and are essentially open text. The diversity of the twentieth century music manuscript, both in terms of musical language and medium, also raise new issues for sketch studies. Borrowing from Philip Gossett, this paper examines three areas of manuscript studies—confirmatory, suggestive, and conceptual—to ponder on the analysis of 20th century music. From this angle, the paper analyzes the manuscripts of Taiwanese composer Lu Yan. It focuses on several diagrams of integers in the composer’s sketches. In particular the paper examines how these diagrams reflect abstract conceptualization of pitch structure and harmony language, and how they are connected to his composition, “Woodwind Quintet.” These sketches of “pitch material” illustrate the profound thinking encompassing his harmony, melody and tone row and balanced relationship of sound world.Peer reviewedPrimarily in Chinese; abstract, annotations, notes, and some references in English
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