نتایج جستجو برای: overcoming spatial and temporal limitation

تعداد نتایج: 16901659  

Journal: :IEEE Geoscience and Remote Sensing Magazine 2021

Remotely sensed, spatially continuous and high spatiotemporal resolution (hereafter referred to as resolution) land surface temperature (LST) is a key parameter for studying the thermal environment has important applications in many fields. However, difficult atmospheric conditions, sensor malfunctioning scanning gaps between orbits frequently introduce spatial discontinuities into satellite-re...

Journal: :تحقیقات جغرافیایی 0
احمدرضا قاسمی گروه جغرافیای طبیعی داانشگاه تبریز علی اکبر رسولی گروه جغرافیای طبیعی داانشگاه تبریز علی اکبر رسولی گروه جغرافیای طبیعی داانشگاه تبریز سعید جهانبخش گروه جغرافیای طبیعی داانشگاه تبریز سعید جهانبخش گروه جغرافیای طبیعی داانشگاه تبریز

the study of spatial and temporal changes in climate parameters, is one the most important issues in the world's climate research. study of changes in cloud cover as one of the most important climate parameters is important, because clouds are in top of hydrologic cycle and changes in them make changes in spatial and temporal variations in other climate parameters. in this study, the spati...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1389

rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...

2016
Eun Ju Cha Kyong Hwan Jin Dong-Wook Lee Eung Yeop Kim Jong Chul Ye

In dynamic contrast enhanced (DCE) MRI, temporal and spatial resolution can be improved by timeresolved angiography with interleaved stochastic trajectories (TWIST). However, due to view sharing, the temporal resolution of TWIST is not a true one. To overcome this limitation, we employ recently proposed annihilating filter-based low rank Hankel matrix approach (ALOHA) that interpolates the miss...

Journal: :Vision Research 2003
Susana T.L Chung Harold E Bedell

The ability to see fine detail diminishes when the target of interest moves at a speed greater than a few deg/s. The purpose of this study was to identify fundamental limitations on spatial acuity that result from image motion. Discrimination of Vernier offset was measured for a pair of vertical abutting lines and letter resolution was measured using a four-orientation letter 'T'. These stimuli...

Journal: :مدیریت آب و آبیاری 0
سید پویان پیرنیا کارشناس ارشد مهندسی ساز ههای آبی، گروه ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جمال محمد ولی سامانی استاد گروه مهندسی سازه های آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جواد منعم استادیار گروه مهندسی ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران

the determination of temporal and spatial salinity in tidal rivers is significant in supplying water for agriculture purposes, particularly where there is no controller dam at the downstream. in this research, the coherens model was applied to study the hydraulics of water flow, salinity distribution and transmission at the bahmanshir river. coherens is a 3d multi-purpose hydrodynamic model whi...

ژورنال: سلامت و محیط زیست 2017

Background and Objective: In the recent decade, critical condition of particulate matters (PMs) concentration is considered as one of the most important issues in Tehran megacity. Due to sparse spatial distribution of air quality monitoring stations and economic considerations, researchers proposed remote sensing technique as a fast and economical way to obtain complete spatial and temporal cov...

Journal: :iranian rehabilitation journal 0
mahmood bahramizadeh department of orthotics and prosthetics, university of social welfare and rehabilitation sciences, tehran, iran. mokhtar arazpour department of orthotics and prosthetics, university of social welfare and rehabilitation sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) stephen william hutchins ihscr, faculty of health & social care, university of salford, greater manchester, uk.سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences)

objectives: this study was designed to evaluate the effectiveness of a modified floor reaction ankle foot orthosis (frafo) design on gait performance in children with cerebral palsy. methods: eight children with cerebral palsy wore a modified frafo bilaterally for six weeks. motion analysis was used to assess the immediate effectiveness of the orthosis on improving gait and also following six w...

Journal: :iranian journal of radiation research 0
a. mirzajani medical physics group, tehran university of medical sciences, tehran, iran n. riyahi-alam medical physics group, tehran university of medical sciences, tehran, iran m.a. oghabian medical physics group, tehran university of medical sciences, tehran, iran k. firuznia radiology group, tehran university of medical sciences, tehran, iran h. saberi neurosurgery group, tehran university of medical sciences, tehran

abstract  background: the brain response to temporal frequencies (tf) has been already reported, but with no study reported for different tf with respect to various spatial frequencies (sf).  materials and methods: fmri was performed by 1.5t ge-system in 14 volunteers during checkerboard, with tfs of 4, 6, 8 and 10hz in low and high sfs of 0.5 and 8cpd.  results: average percentage bold signal ...

Mohsen Mohammadzadeh, Somayeh Mousavi ,

 Fitting a suitable covariance function for the correlation structure of spatial-temporal data requires de-trending the data. In this article, some potential models for spatial-temporal trend are presented. Eventually the best model will be announced for de-trending tropospheric ozone concentration data for the city of Tehran (Capital city of Iran). By using the selected trend model, some ...

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