نتایج جستجو برای: statistical analysis and spatial stratification

تعداد نتایج: 17331887  

ژورنال: اندیشه آماری 2017
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‎Analysis of large geostatistical data sets‎, ‎usually‎, ‎entail the expensive matrix computations‎. ‎This problem creates challenges in implementing statistical inferences of traditional Bayesian models‎. ‎In addition,researchers often face with multiple spatial data sets with complex spatial dependence structures that their analysis is difficult‎. ‎This is a problem for MCMC sampling algorith...

Journal: :caspian journal of enviromental sciences 0

estimation and mapping of forest resources are preconditions for management, planning and research. in this study, we applied kriging interpolation of geostatistics for estimation and mapping of forest stock at-tributes in a natural, uneven-aged, unmanaged forest in the caspian region of northern iran. the site of the study has an area of 516 ha and an elevation that ranges from 1100 to 1450 m ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم انسانی 1392

this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...

Journal: :Journal of Geographical Systems 2000
Noel Cressie Hal S. Stern Deanne Reber Wright

Suppose that geographic data under investigation are rates associated with polygons. For example, disease incidence, mortality, and census undercount data may be displayed as rates. Spatial analysis of data of this sort can be handled very naturally through Bayesian hierarchical statistical modeling, where there is a measurement process at the ®rst level, an explanatory process at the second le...

Bahram Mirshekari Ebrahim Khalilvand Salim Farzaneh Shahryar Dashti, Vahid Ashrafi,

The ornamental and medicinal saffron with high economic value encompasses a great share of non-oil exports in Iran. As a result, identification of suitable areas for saffron cultivation in Ardabil province located in northwestern part of Iran necessitate effective planning for expanding cultivation and production of this product. Given the effect of various environmental factors on growth and y...

Journal: :Remote Sensing 2022

The objectives of this study were to evaluate spatial sampling and statistical aspects landscape-level wildfire rate spread (ROS) estimates derived from airborne thermal infrared imagery (ATIR). Wildfire progression maps ROS repetitive ATIR image sequences collected during the 2017 Thomas Detwiler events in California. Three separate landscape unit (LSU) sizes used extract remotely sensed envir...

2016
Shenghang Jiang Sai Divya Challapalli Yong Wang

We report a robust nonparametric descriptor, J′(r), for quantifying the spatial organization of molecules in singlemolecule localization microscopy. J′(r), based on nearest neighbor distribution functions, does not require any parameter as an input for analyzing point patterns. We show that J′(r) displays a valley shape in the presence of clusters of molecules, and the characteristics of the va...

2007
Stefan Th. Gries Sabine Stoll Michael Tomasello Elena Lieven Patricia M. Clancy Deitz Fitzgerald

Acknowledgments The larger portion of this paper was written during the first author's stays at the Department of Psychology and the Department of Linguistics of the Max Planck Institute for Evolutionary Anthropology. We thank Michael Tomasello, Elena Lieven and Bernard Comrie for providing enormously stimulating working environments, Patricia M. Clancy for comments and discussion, and the anon...

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