نتایج جستجو برای: f17

تعداد نتایج: 158  

ژورنال: :فصلنامه علمی -پژوهشی تحقیقات اقتصاد کشاورزی 2013
احمد اکبری محبوبه شارعی حدادزاده حسین مهرابی بشرآبادی

در این مطالعه با استفاده از روش­های اقتصادسنجی arma ، garch  و روش­های هوش محاسباتی، شبکه­ی عصبی مصنوعی و الگوریتم ژنتیک اقدام به پیش­بینی میزان صادرات خرمای ایران برای دوره­ی 1395-1389 شد. به­منظور انجام بررسی­ها از داده­های مربوط به دوره­ی زمانی 1388-1346 استفاده گردید. از داده­های دوره­ی 1384-1346 به­منظور مدل­سازی و از داده­های 4 سال آخر برای بررسی قدرت پیش­بینی استفاده شد. نتایج مطالعه نشا...

Journal: :Journal Of Geophysical Research: Space Physics 2023

The polar cap can become teardrop shaped through the poleward expansion of dusk and dawn sectors auroral oval, to form what is called horse collar aurora (HCA). formation HCA has been linked dual-lobe reconnection (DLR) where magnetic flux closed at dayside magnetopause. A prolonged period northward IMF required for HCA. have previously identified in UV images captured by Special Sensor Ultravi...

Journal: :Journal Of Geophysical Research: Space Physics 2022

Horse collar aurora (HCA) are an auroral feature where the dawn and dusk sector oval moves polewards polar cap becomes teardrop shaped. They form during prolonged periods of northward interplanetary magnetic field (IMF), when IMF clock angle is small. Their formation has been linked to dual-lobe reconnection (DLR) closing flux at dayside magnetopause. The conditions necessary for DLR currently ...

Journal: :Agronomy 2021

Grain shape is a key factor for yield and quality in rice. To investigate the genetic basis of grain high-yielding hybrid rice variety Nei2You No.6, set recombinant inbred sister lines (RISLs) were used to map quantitative trait loci (QTLs) determining length (GL), width (GW), length-width ratio (LWR) four environments. A total 91 medium/minor-effect QTL detected using high-density consisting 3...

2016
Qimao Wang Yingni Shi Lijian Shi Bin Zou

A sea ice extent retrieval algorithm over the polar area based on scatterometer data of HY-2A satellite has been established. Four parameters are used for distinguishing between sea ice and ocean with Fisher’s linear discriminant analysis method. The method is used to generate polar sea ice extent maps of the Arctic and Antarctic regions of the full 2013-2014 from the scatterometer aboard HY-2A...

Journal: :Revista Argentina de microbiologia 2015
Natalia Y Picco Fabrisio E Alustiza Romina V Bellingeri María C Grosso Carlos E Motta Alejandro J Larriestra Claudina Vissio Karina I Tiranti Horacio R Terzolo Ana R Moreira Adriana B Vivas

The aim of this study was to perform a current molecular characterization of bovine pathogenic Escherichia coli strains isolated from random samplings in Argentinean dairy farms. Rectal swabs were obtained from 395 (63.7%) healthy and 225 (36.3%) diarrheic calves, belonging to 45 dairy farms in Cordoba Province, Argentina. E. coli isolates were examined for virulence genes (f5, f41, f17, sta, s...

2000
Amin Shokrollahi

Multiple antennas can greatly increase the data rate and reliability of a wireless communica-tion link in a fading environment. It is well-known that unitary matrices can be used to designdi erentially modulated space-time constellations. These constellations have a particularly e -cient description if they form a nite group under matrix multiplication. In this paper we willshow...

2011
Tan Duc Nguyen Thin Thanh Vo Hung Vu-Khac

This study was conducted to determine the prevalence and characteristics of pathogenic Escherichia (E.) coli strains from diarrheic calves in Vietnam. A total of 345 E. coli isolates obtained from 322 diarrheic calves were subjected to PCR and multiplex PCR for detection of the f5, f41, f17, eae, sta, lt, stx1, and stx2 genes. Of the 345 isolates, 108 (31.3%) carried at least one fimbrial gene....

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