نتایج جستجو برای: lines and 71 x
تعداد نتایج: 16945757 فیلتر نتایج به سال:
seismic coherency is a measure of lateral changes in acoustic impedance that are caused by variations in structure, stratigraphy, lithology, porosity, and fluid content. seismic coherency is a geometrical attribute that establishes temporal and lateral relationships with other attributes. seismic coherency can be defined by coherency attributes. when coherency attributes are applied to seismic ...
در سال 1940 ،اولام سوالی درباره نگاشت های تقریبی مطرح کرد به این مضمون که ((تحت چه شرایطی یک همریختی تقریبی به یک همریختی نزدیک می شود؟(( در سال 1941 ،هایرزجوابی مثبت به سوال اولام درفضاهای باناخ ارائه داد در واقع ثابت کرد اگر ??0 و f:x?y نگاشتی از فضای نرم دار x به فضای باناخ y باشد به طوری که ?f(x+y)-f(x)-f(y)??? (x,y?x) (1) آن گاه نگاشت جمعی منحصر به فرد t:x?...
OBJECTIVE In 1998, an enterovirus 71 (EV71) epidemic in Taiwan was associated with hand, foot, and mouth disease (HFMD)/herpangina and involved 78 fatal cases. We measured EV71 seroprevalence rates before and after the epidemic and investigated risk factors associated with EV71 infection and illness. METHODS Neutralizing antibodies to EV71 were assayed for 539 people before the epidemic and 4...
for different agronomic traits in sunflower (helianthus annuus l.) inbred lines were estimated using “line × tester” analysis method. six new restorer lines were crossed with four cms lines as tester in 2006 growing season. the 24 f1 single cross combinations were planted in complete randomized block design with four replications in khoy field research station in 2007 growing season. there were...
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