Results 21 to 30 of about 920,390 (293)

An Adaptive Decomposition Approach with Dipole Aggregation Model for Polarimetric SAR Data

open access: yesRemote Sensing, 2021
Polarimetric synthetic aperture radar (PolSAR) has attracted lots of attention from remote sensing scientists because of its various advantages, e.g., all-weather, all-time, penetrating capability, and multi-polarimetry.
Zezhong Wang, Qiming Zeng, Jian Jiao
doaj   +1 more source

Espaces virtuels et pré-expérience de l’espace géographique

open access: yesNetcom, 2011
“Virtual spaces and pre-experience in geographic space”- The virtual representations of space have largely democratized in recent years. Market liberalization of satellite images and increased capacity of data transfer on the wired and non wired deeply ...
Jérémie Valentin   +3 more
doaj   +1 more source

Spatiotemporal Variation of Vegetation Productivity and Its Feedback to Climate Change in Northeast China over the Last 30 Years

open access: yesRemote Sensing, 2021
Gross primary productivity (GPP) represents total vegetation productivity and is crucial in regional or global carbon balance. The Northeast China (NEC), abundant in vegetation resources, has a relatively large vegetation productivity; however, under ...
Ling Hu   +4 more
doaj   +1 more source

Modeling industrial evolution in geographical space [PDF]

open access: yesJournal of Economic Geography, 2007
In this article we study a class of evolutionary models of industrial agglomeration with local positive feedbacks, which allow for a wide set of empirically testable implications. Their roots rest in the Generalized Polya Urn framework. Here, however, we build on a birth-death process over a finite number of locations and a finite population of firms ...
Giulio Bottazzi   +3 more
openaire   +5 more sources

Spatial Development [PDF]

open access: yes, 2009
We present a theory of spatial development. A continuum of locations in a geographic area choose each period how much to innovate (if at all) in manufacturing and services.
Desmet, Klaus, Rossi-Hansberg, Esteban
core   +8 more sources

Through a glass darkly: a case for the study of virtual space [PDF]

open access: yes, 2002
This paper begins to examine the similarities and differences between virtual space and real space, as taken from anarchitectural (as opposed to a biological, psychological, geographic, philosophical or information theoretic)standpoint.
Bazan, Jorge   +4 more
core   +2 more sources

Protons in near earth orbit [PDF]

open access: yes, 2000
The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at an altitude of 380 km.
A. Arefiev   +216 more
core   +4 more sources

Rediscovering the Geographic Space through the Geographical Space

open access: yesGEOUSP: Espaço e Tempo (Online), 1998
Este artigo pretende discutir a técnica enquanto expressáo das relações entre o Homem e o espaço por ele ocupado, por ele transformado. Buscando nos aproximar de uma visão geográfica das ações do Homem sobre a Natureza, tentam os entender a construção do "presente" e sua configuração nos tempos ...
openaire   +3 more sources

Research on cyberspace surveying and mapping technology

open access: yes网络与信息安全学报, 2016
Cyberspace surveying and mapping technology is a network common foundation and application technology.The research progress of cyberspace surveying and mapping technology was reviewed and discussed.Firstly,the con-notation and principle framework of ...
Fan ZHAO,Xiang-yang LUO,Fen-lin LIU
doaj   +3 more sources

Detached from their homeland: the Latter-day Saints of Chihuahua, Mexico [PDF]

open access: yes, 2004
Over the past few decades, the homeland concept has received an ever-increasing amount of attention by cultural geographers. While the debate surrounding the necessity and applicability of the concept continues, it is more than apparent that no other ...
Smith, Jeffrey S., White, Benjamin N.
core   +2 more sources

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