نتایج جستجو برای: f17
تعداد نتایج: 158 فیلتر نتایج به سال:
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...
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...
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 ...
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...
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...
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...
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...
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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