نتایج جستجو برای: statistical variability

تعداد نتایج: 533019  

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 1999
Charles Kervrann Fabrice Heitz

We present a statistical method for the motion-based segmentation of deformable structures undergoing nonrigid movements. The proposed approach relies on two models describing the shape of interest, its variability, and its movement. The first model corresponds to a statistical deformable template that constrains the shape and its deformations. The second model is introduced to represent the op...

1999
J. Prahl

An unbinned statistical test on cluster-like deviations from Poisson processes for point process data is introduced, presented in the context of time variability analysis of astrophysical sources in count rate experiments. The measure of deviation of the actually obtained temporal event distribution from that of a Poisson process is derived from the distribution of time differences between two ...

2008
Vikram M. Mehta

Decadal climate variability (DCV) has impacted society for centuries, perhaps millennia. There are well-documented episodes of droughts, floods, and tropical storms lasting one or more decades in many parts of the world. It was believed for many centuries that solar and lunar cycles at decadal timescales (~10-20 years) influence the Earth’s climate. This belief led to the development of concept...

1996
Charles KERVRANN Fabrice HEITZ

We present a statistical method for the motion-based segmentation of deformable structures undergoing non-rigid movements. The proposed approach relies on two models describing the shape of interest, its variability and its movement. The rst model corresponds to a statistical deformable template that constrains the shape and its deformations. The second model is introduced to represent the opti...

2006
Leif Chr. Stige Geir Ottersen Keith Brander Kung-Sik Chan Nils Chr. Stenseth

The impact of the environment on interannual variability in fish recruitment has proven difficult to establish empirically, and environment-recruitment correlations have often been found to break down when more data become available. This may suggest that the statistical models have failed to capture the essential explanatory variables, or that environment-recruitment relationships are non-stat...

Journal: :Studies in health technology and informatics 2008
Carol E. Reiley Henry C. Lin Balakrishnan Varadarajan Balázs Vágvölgyi Sanjeev Khudanpur David D. Yuh Gregory D. Hager

The ability to accurately recognize elementary surgical gestures is a stepping stone to automated surgical assessment and surgical training. However, as the pool of subjects increases, variation in surgical techniques and unanticipated motion increases the challenge of creating robust statistical models of gestures. This paper examines the applicability of advanced modeling techniques from auto...

2015
Roger H. French Rudolf Podgornik Timothy J. Peshek Laura S. Bruckman Yifan Xu Nicholas R. Wheeler Abdulkerim Gok Yang Hu Mohammad A. Hossain Devin A. Gordon Pei Zhao Jiayang Sun

Based on recent advances in nanoscience, data science and the availability of massive real-world datastreams, the mesoscopic evolution of mesoscopic energy materials can now be more fully studied. The temporal evolution is vastly complex in time and length scales and is fundamentally challenging to scientific understanding of degradation mechanisms and pathways responsible for energy materials ...

Journal: :desert 2012
mohammad jafari m tahmoures h mohammad asgari m biniaz

the main objective in the present study was to assess the spatial variation of chemical and physical soil properties and then use this information to select an appropriate area to install a pasture rehabilitation experiment in the zereshkin region, iran. a regular 250 m grid was used for collecting a total of 150 soil samples (from 985 georeferenced soil pits) at 0 to 30, and 30 to 60 cm layers...

2005
Werner Ehm

Are there relationships between consciousness and the material world? Empirical evidence for such a connection was reported in several meta-analyses of mind-matter experiments designed to address this question. In this paper we consider such meta-analyses from a statistical modeling perspective, emphasizing strategies to validate the models and the associated statistical procedures. In particul...

2005
V. A. Golovko T. V. Kondranin

* Corresponding author. ** The work has been partly supported by RFBR grant 04-01-00397-а. Abstract – Time-series of global outgoing radiation fields have been reconstructed for the last 20 years using satellite observations from various space systems including some Russian systems. It was detected that during the past two decades global outgoing longwave radiation (OLR) increased (considerably...

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