نتایج جستجو برای: spatial data analysis

تعداد نتایج: 4682427  

ژورنال: پژوهش های ریاضی 2016
Mohammadzadeh , M, Abyar, A, Motarjem , K,

An important issue in survival data analysis is the identification of risk factors. Some of these factors are identifiable and explainable by presence of some covariates in the Cox proportional hazard model, while the others are unidentifiable or even immeasurable. Spatial correlation of censored survival data is one of these sources that are rarely considered in the literatures. In this paper,...

M. Mohammadzadeh

The statistical analysis of spatial data is usually done under Gaussian assumption for the underlying random field model. When this assumption is not satisfied, block bootstrap methods can be used to analyze spatial data. One of the crucial problems in this setting is specifying the block sizes. In this paper, we present asymptotic optimal block size for separate block bootstrap to estimate the...

2004
Alistair Ford

This paper describes the use of ArcGIS and the 3D Analyst extension for the integration of multiple petroleum datasets as part of research undertaken by the University of Newcastle upon Tyne, UK, on behalf of Shell International Exploration and Production. The integration of datasets from both surface and subsurface application areas is essential to present a complete picture for decision-makin...

2011
N. Naga Saranya

Spatial data mining is the process of discovering, motivating and previously unknown, but potentially helpful patterns from large spatial datasets. Extracting interesting and useful patterns from spatial datasets is more tricky than extracting the parallel patterns from established numeric and definite data due to the complexity of spatial data types, spatial relationships, and spatial autocorr...

2011
Oliver Lerbs Christian Oberst

A wide range of aggregate data is used to examine the spatial variation in homeownership rates among a cross-section of 96 German planning regions. The analysis accounts for potential endogeneity of prices and affordability as well as for spatial dependence in homeownership levels. In addition to familiar demographic and socioeconomic variables, the regional price and affordability of owner-occ...

2004
Shashi Shekhar Pusheng Zhang Yan Huang Ranga Raju Vatsavai

Spatial data mining is the process of discovering interesting and previously unknown, but potentially useful patterns from large spatial datasets. Extracting interesting and useful patterns from spatial datasets is more difficult than extracting the corresponding patterns from traditional numeric and categorical data due to the complexity of spatial data types, spatial relationships, and spatia...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

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