نتایج جستجو برای: شاخص vci

تعداد نتایج: 74925  

ژورنال: مجله مرتعداری 2015

تأثیر خشک‌سالی می‌تواند به‌صورت کاهش منابع آب، کاهش تولیدات کشاورزی، تغییر در پوشش گیاهی اراضی مرتعی منطقه و تسریع در بیابان‌زایی باشد. برای مطالعه و پایش خشک‌سالی نیاز به کمی سازی اثرات آن با استفاده از شاخص‌های خشک‌سالی است. این شاخص‌ها بر اساس نوع داده‌های قابل‌دسترسی به دودسته کلی: زمینی و ماهواره‌ای تقسیم می‌شوند. هدف این مطالعه، مقایسه توان تشخیص و گروه‌بندی تغییرات رخ‌داده درپوشش گیاهی ب...

Journal: :international journal of advanced biological and biomedical research 0
mohammad hossein rezaei moghadam professor of physical geography, university of tabriz, iran khalil valizadeh kamran assistant professor of physical geography, university of tabriz, iran hashem rostamzadeh assistant professor of physical geography, university of tabriz, iran ali rezaei ma remote sensing and gis, university of tabriz, iran

drought is a natural disaster. because a significant impact on the agricultural and economy sector, it affects the lives of local residents. with using of the remote sensing, drought can be studied through its effects on plants and agriculture resulting in more accurate and effective results found for modeling drought. in this study, the efficiency of agricultural drought indicators for estimat...

Journal: :Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2004

Journal: :Natural Hazards 2023

Climate change has made The Gambia vulnerable to drought hazard. Variability and negative trends in rainfall quantity mid-season dry spells mainly attributed the impacts of climate change. inadequacy hydrometeorological information puts agricultural sector at a high risk which employs over 70% population. aim this study was establish intensity spatiotemporal pattern from 2000 2020 using multipl...

Journal: :مدیریت آب و آبیاری 0
روزبه موذن زاده دانشجوی دکتری گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، خراسان رضوی صالح ارشد استادیار، گروه مهندسی آب ، دانشکده کشاورزی، دانشگاه گیلان، رشت - ایران بیژن قهرمان استاد، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، خراسان رضوی - ایران کامران داوری دانشیار، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، خراسان رضوی - ایران

regional vegetation plays an important role in modeling ecosystem changes and conservation. meteorological drought indices which are directly obtained from such meteorological data as precipitation can't be useful in drought monitoring if those data are absence. therefore, remote sensing techniques may provide an efficient technique for drought monitoring. in this study, the values of norm...

Journal: :IEEE Transactions on Fuzzy Systems 2023

Choquet integral is a widely used aggregation operator on 1-D and interval-valued information, since it able to take into account the possible interaction among data. However, there are many cases where information taken vectorial, such as long short-term memories (LSTM). LSTM units kind of recurrent neural networks that have become one most powerful tools deal with sequential they power contro...

Journal: :Alzheimers & Dementia 2021

Abstract Background In individuals prone to white matter pathology, such as older adults with vascular cognitive impairment (VCI), myelin loss could contribute mobility impairment. Using water fraction (MWF), an in‐vivo technique quantify content in the brain, we investigated whether is associated performance VCI. Method We analyzed cross‐sectional data from thirty‐two subjects MRI‐evidence of ...

2015
Maria Carrillo

WASHINGTON, DC, July 23, 2015 – Positive results of three new randomized controlled trials of aerobic exercise in Alzheimer’s disease, vascular cognitive impairment (VCI) and mild cognitive impairment (MCI) were reported today at the Alzheimer’s Association International Conference 2015 (AAIC 2015) in Washington, D.C. They provide hope there may soon be a tool that people with dementia can use ...

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