نتایج جستجو برای: abstractidentification of spatial

تعداد نتایج: 21187871  

Journal: :پژوهش های جغرافیای انسانی 0
مجتبی رفیعیان دانشیار گروه شهرسازی دانشگاه تربیت مدرس آزاده علیزاده کارشناس ارشد برنامه ریزی شهری دانشگاه تربیت مدرس علی اکبر تقوایی دانشیار گروه شهرسازی دانشگاه تربیت مدرس

introduction one of the critical issues associated with sustainability in the twenty-first century is how cities are growing and developing in the space. rapid urban growth and physical development of cities cause disintegration of the spatial organization of cities and consequently spatial inequality between urban spaces. this phenomenon can be considered as spatial segregation or fragmentatio...

Journal: :iranian journal of public health 0
*kun xiang deyong song

background: using spatial analysis tools to determine the spatial patterns of china province-level perinatal mortality and using spatial econometric model to examine the impacts of health care resources and different socio-economic factors on perinatal mortality. methods: the global moran’s i index is used to examine whether the spatial autocorrelation exists in selected regions and moran’s i s...

Journal: :iranian journal of medical physics 0
hossein arabi m.sc. student, radiation medicine dept., shahid beheshti university, tehran, iran. alireza kamali asl assistant professor, nuclear engineering dept., shahid beheshti university, tehran, iran. seyed mahmood reza aghamiri associate professor, nuclear engineering dept., shahid beheshti university, tehran, iran.

introduction: variable resolution x-ray (vrx) ct is a new type of ct that can image objects at various spatial resolutions. in a vrx ct scanner, the spatial resolution increases at the cost of reduction in the field of view (fov). an important factor that limits the spatial resolution of the vrx ct is the effect of focal spot size. also, the optimum magnification is different at each incident a...

Journal: :آب و خاک 0
شایسته غلامی سید محسن حسینی جهانگرد محمدی عبدالرسول ماهینی

abstract soil invertebrate and their spatial pattern are affected strongly by environmental factors. spatial variability of soil properties is one of the most important reasons of the macrofauna variability. this study was conducted to investigate the spatial variability of soil properties and soil macrofauna biomass in the riparian forest landscape of karkhe river. soil macro fauna were sample...

Spatial analysis as the main approach of geography was reviewed and searched through its historical development. The results of this exploratory research showed that this approach was born after the Second World War due to the overall interest of geographers to develop universal theories and laws. The advocators of this field believed that the old regional geography was not able to develop ...

Journal: :iranian journal of radiation research 0
h. arabi radiation medicine department, shahid beheshti university, tehran, iran a.r. kamali asl radiation medicine department, shahid beheshti university, tehran, iran s.m. aghamiri radiation medicine department, shahid beheshti university, tehran, iran

background: a variable resolution x-ray (vrx) ct scanner provides a great increase in the spatial resolution. in vrx ct scanners, the spatial resolution of the system and its field of view (fov) can be changed according to the object size. one of the main factors that limit the spatial resolution of vrx ct scanner is the effect of the x-ray focal spot. materials and methods: a theoretical study...

Journal: :iranian economic review 0

poverty can have spatial dimensions. while general figures might show the spatial pattern of poverty, there is a need for more detailed examination of this pattern. relying on simple figures of spatial patterns and ranking regions based on them might be misleading. this paper tries to apply spatial analysis methodsm, namely spatial autoregressive models to find out the impacts of space on the h...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
مرتضی تهامی پور زرندی دانشجوی دکتری دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران حبیب الله سلامی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران سعید یزدانی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران امیرحسین چیذری استادیار اقتصاد کشاورزی، دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران

the purpose of this study is to determine spatial dependency pattern of systematic risk of dry land wheat production in iran, using spatial autoregressive models. to this end, spatial weighted contiguity matrix was constructed based on the delaunay triangularization method, and correlation coefficient among these neighbors were estimated using spatial autoregressive models. in addition, the rol...

The economic components of a geographic region, such as its economic growth, are influenced by the spillover effect of other regions’ economic components. In addition to these spatial dependences, there are common factors, such as oil price, that induce a correlation among the economic variables of the geographic regions. Thus, it is necessary to distinguish between the dependence created by th...

Journal: :international journal of human capital in urban management 0
r. farhady department of geography and urban planning, payame noor university, tehran, iran e. tamimi department of geography and urban planning, payame noor university, tehran, iran

this research has been conducted with the aim of analyzing the spatial distribution of existing cultural land use in district 3 of tehran municipality and proposal for new site selection for cultural land use in this district. after studying previous researches on the issues of land use and site selection, 13 indicators for locating cultural land use were identified then by using distance mappi...

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