نتایج جستجو برای: coefficient of determination r2

تعداد نتایج: 21179691  

Journal: :مهندسی بیوسیستم ایران 0
سما عمید دانشگاه محقق اردبیلی ترحم مصری گندشمین دانشگاه محقق اردبیلی غلامحسین شاهقلی دانشگاه محقق اردبیلی

energy management is one of the main ways of the efficient use of energy resources. the prediction of crop yields based on energy inputs can help farmers and policymakers to estimate the level of production. required data for study were randomly collected from 70 broiler farms in north west of iran. the input energies were included human labour, machinery, fuel, feed and electricity and the out...

Journal: :Daengku 2023

This study aims to analyze the influence and competence on employees performance of Central Statistics Agency (BPS) in Pangkalpinang City South Bangka Regency. type research is quantitative research. The object was BPS Regency with total population 40 people. analytical tools used this were: frequency analysis, descriptive validity test, reliability hypothesis testing, regression coefficient de...

2016
BROMOCRESOL GREEN ABDUL AZIZ RAMADAN HASNA MANDIL SOUAD ZEINO

Objective: A simple, direct and accurate spectrophotometric method has been developed for the determination of glimepiride (GLM) in pure and pharmaceutical formulations by complex formation with bromocresol green (BCG). Methods: The method involves the formation of a yellow ion-pair complex between bromocresol green reagent with glimepiride (C24H34N4O5S); after reacted it with Na2CO3 to give C2...

Journal: :مدیریت آب و آبیاری 0
محمدرضا گودرزی دانشجوی دکتری مهندسی عمران - آب، دانشکده عمران، دانشگاه علم و صنعت ایران، تهران - ایران باقر ذهبیون استادیار دانشکده عمران، دانشگاه علم و صنعت ایران، تهران - ایران علی رضا مساح بوانی استادیار گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران علی رضا کمال کارشناس ارشد مهندسی منابع آب، گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران

nowadays protecting land cover, quality and quantity of water resources are important. surface runoff is one of most important reasons of soil erosion which causes sediment in reservoirs and reduction of land’s fertility and also quality reduction water of rivers. so the main issue is exact prediction of basin runoff to raining events. the hydrologic models are simplified models of real hydrolo...

ژورنال: علوم آب و خاک 2018

The most important factor in determining crop water requirement is estimation of evapotranspiration (ET). Majority of the methodsestimate ET apply series of relatively complex formula,which is then used to determine crop evapotranspiration (ETc). The parameters used in aforesaid methods are: Solar radiation, wind speed, humidity, etc. Unfortunately, in Iran and many countries, long-term records...

2011
Leonardo Metsavaht Gustavo Leporace Maria Matilde de Mello Sposito Marcelo Riberto Luiz Alberto Batista

OBJECTIVE To measure the validity and reliability of the WOMAC, IKDC and Lysholm questionnaires among patients with knee osteoarthritis and determine the influence of age on their scores. METHOD Fifty-seven patients diagnosed with primary osteoarthritis of the knee answered the SF-36, WOMAC, IKDC and Lysholm questionnaires. Validity was tested by measuring the correlation (Pearson's correlati...

Journal: :Remote Sensing 2017
Chung Il Jung Yonggwan Lee Younghyun Cho Seongjoon Kim

This study attempts to estimate spatial soil moisture in South Korea (99,000 km2) from January 2013 to December 2015 using a multiple linear regression (MLR) model and the Terra moderate-resolution imaging spectroradiometer (MODIS) land surface temperature (LST) and normalized distribution vegetation index (NDVI) data. The MODIS NDVI was used to reflect vegetation variations. Observed precipita...

Journal: :Remote Sensing 2015
Lei Fan Qing Xiao Jianguang Wen Qiang Liu Rui Jin Dongqing You Xiaowen Li

High spatial resolution soil moisture (SM) data are crucial in agricultural applications, river-basin management, and understanding hydrological processes. Merging multi-resource observations is one of the ways to improve the accuracy of high spatial resolution SM data in the heterogeneous cropland. In this paper, the Bayesian Maximum Entropy (BME) methodology is implemented to merge the follow...

ژورنال: علوم آب و خاک 2021

The purpose of this research was to investigate the trend of annual changes in Yazd stationchr('39')s meteorological parameters including minimum and maximum average daily temperature and average daily precipitation (1961-2005), as well as the predicted annual mean of these parameters in the three upcoming thirty years of the 2040s, 2070s and 2100s, by the SDSM model, under RCP2.6, RCP4.5, RCP8...

ژورنال: علوم آب و خاک 2004
علیرضا سپاسخواه, , محمدمهدی قاسمی, ,

The vast pastures and agricultural development plans for dry farming and irrigated farming in Khuzestan Province depend on rain. This requires availability of annual precipitation prediction models to be used in the management decision-making process. In this research, the long-term daily precipitation data from 15 rain gauge stations in the study area were collected for study and a relationshi...

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