نتایج جستجو برای: coefficient of determination r2

تعداد نتایج: 21179691  

Journal: :اکو هیدرولوژی 0
حسین سلمانی دانشجوی دکتری آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان عبدالرضا بهره مند دانشیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان کاظم صابرچناری دانشجوی دکتری آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان محمد رستمی خلج دانشجوی دکتری آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج

according to variety of accessible hydrological models, evaluateing the efficiency of models for different management objectives are essential. therefore, models with simple structure and using minimal input that can provide an acceptable result can serve as an effective tool to watershed managers. hence, the objective of this research is to evaluate the relative performances of the lumped conc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده کشاورزی 1390

abstract this study is carried out to determine the chemical composition in the three vegetative stages of the haloxylon sp., degradation parameters, with adding naoh and ca(oh2 ). for this purpose, in may and october and january 2010 enough some haloxylon sp. of the ammary area was prepared. crude protein and ash percentage are decrease, neutral detergent fiber percentage with pragress stage ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت معلم تهران - دانشکده علوم 1370

determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

Journal: :medical journal of islamic republic of iran 0
c. xuexin associate chief physician in the department of anesthesiology of ningxia medical college,xi’an, 710032, chinaسازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور m. hanxiang department of anesthesiology of ningxia medical college,yinchuan,750004,chinaسازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور x. lize department of anesthesiology, xi jin hospital, fourth military medical university, xi’an, 710032, chinaسازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور m. jinhai department of anesthesiology of ningxia medical college,yinchuan,750004,chinaسازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور l. hong department of anesthesiology of ningxia medical college,yinchuan,750004,chinaسازمان اصلی تایید شده: 0 دانشگاه های خارج از کشور

abstract objective: to investigate the anesthesia-postoperative awakening time (at) of hepatitis- related cirrhosis patients and their relations to grading scores, portal venous pressure (pvp), prealbumin (pa), and age, to predict postoperative at and provide a basis for adjustment of anesthetic doses during operation. methods: atotal of 71 patients with hepatic cirrhosis and hypersplenism at a...

The piano key weir (PKW) is a type of nonlinear control structure that can be used to increase unit discharge over linear overflow weir geometries, particularly when the weir footprint area is restricted To predict the outflow passing over a piano key weir, the discharge coefficient in the general equation of weir needs to be known. This paper presents the results of laboratory model testing of...

Journal: :اکو هیدرولوژی 0
فریدون رادمنش دانشیار گروه هیدرولوژی و منابع آب، دانشکدۀ مهندسی علوم آب، دانشگاه شهید چمران اهواز امیر پورحقی اباذر سلگی دانشجوی دکتری مهندسی منابع آب، دانشکدۀ مهندسی علوم آب، دانشگاه شهید چمران اهواز

in recent decades, the developments of artificial intelligence to predict hydrologic models have been widely used. in this study, the ability of artificial neural network(ann) models for modeling and predict the biological oxygen demand (bod) is located on the karun river in west iran were evaluated. to improve the simulation results, wavelet analysis was used as a hybrid model. bod index month...

2010
Kelly Marques Queiroz Maria-Luiza Martins Silva Nathália Duque Prado Paulo Marcelo Andrade Lima Rosiane Dias Lopes Diniz Isabela Costa César Gerson Antônio Pianetti Daniel Assis Santos

The development of a specific agar diffusion bioassay for the quantitative determination of fluconazole formulated in capsules was carried out using a strain of Candida albicans ATCC 18804 as the test organism. A prospective validation of the method showed adequate linearity (r2=0.9995), precision (R.S.D. = 4.0% for intra-day and 4.5% for inter-day precision) and accuracy (mean recovery = 102.9...

2017
Sahar V. Doctorvaladan Andrea T. Jelks Eric W. Hsieh Robert L. Thurer Mark I. Zakowski David C. Lagrew

Objective This study aims to compare the accuracy of visual, quantitative gravimetric, and colorimetric methods used to determine blood loss during cesarean delivery procedures employing a hemoglobin extraction assay as the reference standard. Study Design In 50 patients having cesarean deliveries blood loss determined by assays of hemoglobin content on surgical sponges and in suction canisters...

ژورنال: علوم آب و خاک 2012
علیرضا واعظی, , محمد عباسی, ,

The Soil Conservation Service Curve Number (SCS-CN) method is widely used for predicting direct runoff from rainfall events. The ratio of initial abstraction (λ=Ia/S) to maximum potential retention (S) was assumed in its original development to be equal to 0.2 (λ=Ia/S=0.2) in SCS-CN method. Application of the initial abstraction ratio equal to 0.2 out of the area where it has been developed may...

جانی زاده, سعید, وفاخواه, مهدی,

     Prediction of flood peak discharge and runoff volume is one of the major challenges in the management of watersheds. The present study was carried out to estimate event flood peak discharge and runoff volume using artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) in Kasilian watershed, Iran. For this purpose, 15 rainfall characteristics were considered for 6...

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