نتایج جستجو برای: sif

تعداد نتایج: 860  

Journal: :Journal Of Geophysical Research: Biogeosciences 2022

Remote sensing of solar-induced chlorophyll fluorescence (SIF) provides a powerful proxy for gross primary productivity (GPP). It is particularly promising in boreal ecosystems where seasonal downregulation photosynthesis occurs without significant changes canopy structure or content. The use SIF as GPP complicated by inherent non-linearities due to both physical (illumination effects) and ecop...

Journal: :Journal of Pharmaceutical Sciences 2021

Eleven simulated intestinal fluids (SIF) were designed using a Design of Experiment (DoE) approach. The DoE SIF covered range compositions fasted state human fluid (FaHIF) with regard to pH, bile salt (BS), and phospholipid (PL). Using the model compound danazol, apparent crystalline solubility (aCS) amorphous (aAS), as well supersaturation propensity was determined in media. aCS danazol depend...

Journal: :Proceedings of the AAAI Conference on Artificial Intelligence 2020

Journal: :Remote Sensing 2017
Jochem Verrelst Juan Pablo Rivera Caicedo Jordi Muñoz-Marí Gustau Camps-Valls José F. Moreno

Progress in advanced radiative transfer models (RTMs) led to an improved understanding of reflectance (R) and sun-induced chlorophyll fluorescence (SIF) emission throughout the leaf and canopy. Among advanced canopy RTMs that have been recently modified to deliver SIF spectral outputs are the energy balance model SCOPE and the 3D models DART and FLIGHT. The downside of these RTMs is that they a...

Journal: :Remote Sensing 2021

Successfully applied in the carbon research area, sun-induced chlorophyll fluorescence (SIF) has raised interest of researchers from water domain. However, current works focused on empirical relationship between SIF and plant transpiration (T), while mechanistic linkage them not been fully explored. Two mechanism methods were developed to estimate T via SIF, namely water-use efficiency (WUE) me...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه هرمزگان - دانشکده فنی 1390

در آنالیز رشد ترک ضریب شدت تنش (sif)، یک پیش نیاز اساسی می باشد. در این پاپان نامه ضریب شدت تنش (sif) در مد اول، در یک محیط استوانه ای الاستیک ایزوتروپ با ابعاد دلخواه، دارای یک ترک سه بعدی از نوع سکه ای که تحت بارگذاری دلخواه در راستای طول استوانه می باشد، به روشی نیمه تحلیلی بر اساس روش رایله-ریتز بدست می آید. این روش که بر پایه "قانون مقدار ثابت انرژی پتانسیل کل سیستم" استوار است، نتایج بسیا...

Journal: :Environmental Research Letters 2021

Abstract Sun-induced chlorophyll fluorescence (SIF) measurements have shown unique potential for quantifying plant physiological stress. However, recent investigations found canopy structure and radiation largely control SIF, relevance of SIF remains yet to be fully understood. This study aims evaluate whether the SIF-derived signal improves quantification crop responses environmental stresses,...

Journal: :Remote Sensing 2017
Shanshan Du Liangyun Liu Xinjie Liu Jiaochan Hu

Solar-induced chlorophyll fluorescence (SIF), which can be used as a novel proxy for estimating gross primary production (GPP), can be effectively retrieved using ground-based, airborne and satellite measurements. Absorbed photosynthetically active radiation (APAR) is the key bridge linking SIF and GPP. Remotely sensed SIF at the canopy level (SIFcanopy) is only a part of the total SIF emission...

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