نتایج جستجو برای: palearchic region

تعداد نتایج: 537999  

2005
Jean Cardinal Sébastien Collette Stefan Langerman

The region counting distances, introduced by Demaine, Iacono and Langerman [5], associate to any pair of points p, q the number of items of a dataset S contained in a region R(p, q) surrounding p, q. We define region counting disks and circles, and study the complexity of these objects. In particular, we prove that for some wide class of regions R(p, q), the complexity of a region counting circ...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 2001
Athanasios Nikolaidis Ioannis Pitas

We introduce a novel method for embedding and detecting a chaotic watermark in the digital spatial image domain, based on segmenting the image and locating regions that are robust to several image manipulations. The robustness of the method is confirmed by experimental results that display the immunity of the embedded watermark to several kinds of attacks, such as compression, filtering, scalin...

Journal: :J. UCS 2000
Michael B. Smyth

This paper is an essay in axiomatic foundations for discrete geometry intended, in principle, to be suitable for digital image processing and (more speculatively) for spatial reasoning and description as in AI and GIS. Only the geometry of convexity and linearity is treated here. A digital image is considered as a nite collection of regions; regions are primitive entities (they are not sets of ...

2002
JEFFREY C. ALLEN JEFFREY BRUCE LARRY E. KUN LAUREN LANGFORD

Tumors of the pineal region can be divided into three categories (Rubinstein, 1970): (1) germ cell tumors, which range from surgically curable mature teratomas to the malignant germ cell tumors capable of metastasizing throughout the neuraxis; (2) pineal parenchymal tumors, such as the low-grade pineocytoma and the malignant pineoblastoma; and (3) other tumors such as intra-axial astrocytomas, ...

1997
Satoshi Matsuoka Debora A. Nicoll Zhaoping He Kenneth D. Philipson

The cardiac sarcolemmal Na 1 -Ca 2 1 exchanger is modulated by intrinsic regulatory mechanisms. A large intracellular loop of the exchanger participates in the regulatory responses. We have proposed (Li, Z., D.A. Nicoll, A. Collins, D.W. Hilgemann, A.G. Filoteo, J.T. Penniston, J.N. Weiss, J.M. Tomich, and K.D. Philipson. 1991. J. Biol. Chem. 266:1014–1020) that a segment of the large intracell...

2002
P. TZOUVELI K. NTALIANIS

In this paper, a fully automatic scheme for hiding digital watermarks into face regions is proposed. To achieve this goal, an adaptive two-dimensional Gaussian model of skin color distribution is initially used in order to detect face regions within the initial image. Next each face region is decomposed into three levels with ten subbands, using the Discrete Wavelet Transform (DWT) and three pa...

2015
John Schulman Sergey Levine Pieter Abbeel Michael I. Jordan Philipp Moritz

We describe an iterative procedure for optimizing policies, with guaranteed monotonic improvement. By making several approximations to the theoretically-justified procedure, we develop a practical algorithm, called Trust Region Policy Optimization (TRPO). This algorithm is similar to natural policy gradient methods and is effective for optimizing large nonlinear policies such as neural networks...

2017
Koji Nomura Wataru Saito

Koji Nomura ', Wataru Saito Kimiyo Ono2, Hiromitsu Moriyama3, Seiko Takahashi4, Inoue4 and Kiyoshi MasudaS i institute ofAgriculture and R)restt),, University of Tlsukubq 71vukuba, Ibaraki, 305 Jopan 2 institute ofBiologicat Science, Uhiversity of 7lsukuba, 7lsukuba, Ibaraki, 305 Japan 3 Ricuity ofAgricutture, Tbkyo Uhiversity ofAgrieutture and Tlechnology, Fuchu, Tbkyo, 183 Japan ` Division of...

Journal: :Inf. Comput. 1997
Mads Tofte Jean-Pierre Talpin

This paper describes a memory management discipline for programs that perform dynamic memory allocation and de-allocation. At runtime, all values are put into regions. The store consists of a stack of regions. All points of region allocation and de-allocation are inferred automatically, using a type and effect based program analysis. The scheme does not assume the presence of a garbage collecto...

ژورنال: Journal of Research and Health 2014

Background: Efficiency assessment is one of the fundamental issues in hospitals. It is possible to evaluate and compare hospitals with measuring performance indicators. The aim of this study was to compare the performance of affiliated hospitals in Bushehr University of Medical Sciences from the viewpoint of performance indicators by using the graphical Pabon Lasso model. Materials and Methods...

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