نتایج جستجو برای: length biased
تعداد نتایج: 339575 فیلتر نتایج به سال:
A common objective in follow-up studies is to characterize the relationship between longitudinal measurements and time-to-event outcomes. For this aim, various methods were proposed in the statistical literature, such as an extended version of the Cox model with longitudinal covariates or a two-stage approach. However, these techniques have several limitations, including the possibility of bias...
The population of Carassius gibelio (Bloch, 1782) and its parasites in Madatapa Lake (South Georgia)
Gibel carp is a very successful invasive fish species in the waters of Georgian inland and the only fish species in Lake Madatapa. However, almost nothing is known about its biology and morpho-ecological peculiarities at the national level and even the distribution data is not documented. For the first time, we studied the population characteristics of gibel carp in Lake Madatapa (South Georgia...
When the probability of selecting an individual in a population is proportional to its magnitude, it is called length biased sampling. Length-biased sampling (LBS) situations may occur in biological studies, clinical trials, reliability, queuing models, survival analysis and population studies where a proper sampling frame is absent. In such situations items are sampled at rate proportional to ...
Strong dot-size dependence of the positive exchange bias onset with the cooling field was found in Ni /FeF2 exchange biased nanostructures. With increasing cooling field, the sign of the exchange bias field changes from negative to coexistence of positive and negative, and eventually to positive. As the structure size decreases, the lower limit of cooling fields necessary for only positive exch...
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