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تعداد نتایج: 862972 فیلتر نتایج به سال:
Programming languages which have adequate primitives for linguistic information processin~ and a clear semantics at the formal computational level are now slowly emergin~ as a convergent effort from computer science, linguistics, and artificial intelligence. Our work on the processin~ of a special kind o f linguistic information, namely temporal information ,has led us to advocate the use of a ...
A formula is derived for the calculation of the centrifugal distortion constants r a/3ya in the case where the vibration problem is solved by using dependent internal sym metry coordinates. We have calculated the r ’s and the D's with this new formula for a model of cyclopentene with a planar carbon ring (Point group C2v)The r-values calculated are (in units 108 5 sec2 (gem2)-3): X x x x x — 5....
We analyzed nuclear ribosomal DNA (rDNA) transcription and chromatin condensation in individuals from several populations of Tragopogon mirus and T. miscellus, allotetraploids that have formed repeatedly within only the last 80 years from T. dubius and T. porrifolius and T. dubius and T. pratensis, respectively. We identified populations with no (2), partial (2), and complete (4) nucleolar domi...
This study aims to provide new insights into the influencing factors of Earth (low temperature, depth, and annealing time) on heterogeneous kinetics bulk Fe2O3 by molecular dynamics simulation method. The obtained results show that there is an influence low temperature corresponding liquefied gases, such as helium (4.212 K), nitrogen (77 argon (83.8058 oxygen (90 carbon (194.5 depth (h) Earth’s...
persian gazelle, gazella subgutturosa, exists throughout arid and semiarid regions of iran and has a key role in these frail ecosystems. habitat degradation and population decline has placed it on the list of vulnerable species in 2008. the phylogenetic relationships of three persian gazelle populations in the central part of iran (i.e. ghamishlou national park and wildlife refuge, mouteh wildl...
validity of integrative weaning index of discontinuation from mechanical ventilation in iranian icus
results there were 80 successful and 44 unsuccessful as well as 72 successful and 8 unsuccessful weaning cases in the first and second phase of the study, respectively. the area under the roc curves for iwi was 0.967, with standard error of 0.020, 95% confidence interval of 0.899 to 0.993 and significance level of p = 0.001, se = 94.59, sp = 66.67, ppv = 97.22, npv = 50, da = 92.5 and likelihoo...
background with the increase of x-ray use for medical diagnostic purposes, knowing the given doses is necessary in patients for comparison with reference levels. the concept of reference doses or diagnostic reference levels (drls) has been developed as a practical aid in the optimization of patient protection in diagnostic radiology. objectives to assess the radiation doses to neonates from dia...
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