نتایج جستجو برای: spei

تعداد نتایج: 542  

Journal: :Remote Sensing 2021

From the aspect of global drought monitoring, improving regional monitoring method is becoming increasingly important for sustainable development agriculture and economy. The standardized precipitation conversion index (SPCI) calculated by Global Navigation Satellite System (GNSS) observation a new means that has advantages simple calculation real-time monitoring. However, only SPCI with 12-mon...

Journal: :Remote Sensing 2022

As an important ecological security barrier in northern China, the Inner Mongolia Autonomous Region (hereinafter referred to as Mongolia) is seriously affected by drought. It of great significance characterize spatial distribution drought and identify influencing factors Due complex interactions among driving factors, it difficult quantify contribution each factor using linear correlation analy...

Journal: :International Journal of Climatology 2021

This study analyses long-term changes in drought indices (Standardised Precipitation Index—SPI, Standardised Precipitation–Evapotranspiration Index—SPEI) at 1 and 3 months scales 182 stations 11 central eastern European countries during 1949–2018. For comparative purposes, the necessary atmospheric evaporative demand (AED) to obtain SPEI was calculated using two methods, Hargreaves-Samani (SPEI...

Journal: :Atmosphere 2022

This study systematically reviews the under-researched experience of performance indices to determine extreme hydroclimate in tropical Southeast Asia. The review was conducted by Preferred Reporting Items for Systematic Review and Meta-Analysis methods with SCOPUS databases. screening articles is based on inclusion exclusion criteria encompassing published between 2000 2021 solely focused three...

2014
Bijayini Behera Purva Mathur Nidhi Bhardwaj Neetu Jain M. C. Misra Arti Kapil Sarman Singh

BACKGROUND & OBJECTIVES Group C and group G streptococci (together GCGS) are often regarded as commensal bacteria and their role in streptococcal disease burden is under-recognized. While reports of recovery of GCGS from normally sterile body sites are increasing, their resistance to macrolides, fluoroquinolone further warrants all invasive β haemolytic streptococci to be identified to the spec...

پیش­بینی خشکسالی نقش مهمی در طراحی سیستم­های سازگاری با خشکسالی و اجرای عملیات تسکین ایفا می­نماید. داده­های هیدرولوژیک به‌صورت ترکیبی از بخش قطعی و تصادفی می­باشند. با توجه به اینکه داده­های تولیدی مدل­های هوشمند به‌صورت قطعی می­باشند، استفاده از رویکردی جدید برای اعمال بخش تصادفی در پیش­بینی این داده­ها می­تواند قطعیت مدل را افزایش دهد. در این تحقیق با ترکیب مدل برنامه­ریزی بیان ژن (GEP) و مد...

ژورنال: آبخیزداری ایران 2018

منابع اب سطحی و زیرزمینی به شدت تحت تاثیر دوره­های کمبود بارش واقع می­شوند. شاخص­های متعددی برای ارزیابی خشکسالی ارائه شده که هر یک بر­اساس متغییرهای هواشناسی و هیدرولوژیکی می­باشد. در این پژوهش با استفاده از شاخص­های SPI و SPEI و شاخص­های SDI و GRI وضعیت خشکسالی­های هواشناسی و هیدرولوژیک بترتیب ارزیابی شد و تاثیر خشکسالی هواشناسی بر هیدرولوژیک تعیین گردید. همبستگی بین شاخص­ها در مقیاس­های زمان...

2016
Nina Nikolova Pavol Nejedlík Milan Lapin

Atmospheric drought in lowlands in Slovakia is analyzed on the bases of Standardised Precipitation Index (SPI) and Standardised Precipitation Evapotranspiration Index (SPEI). This paper gives information about the dynamic, intensity, seasonal and territorial differences in occurrence of drought with various intensity: mild (near to normal), moderate, severe and extreme for the period 1961–2011....

Journal: :Electr. Notes Theor. Comput. Sci. 2002
Ángel Herranz-Nieva Juan José Moreno-Navarro N. Maya

The paper presents the re e tion fa ilities of the spe i ation language Slam-sl. Slam-sl is an obje t oriented spei ation language where lass methods are spe i ed by pre and post onditions. The re e tion apabilities permit managing these pre and post onditions in spe i ations what means that semanti re e tion is possible. The range of interesting appli ations is very wide: formal spe i ation of...

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