نتایج جستجو برای: hybrid cycle

تعداد نتایج: 460483  

Journal: :Hydrology and Earth System Sciences 2022

Abstract. State-of-the-art global hydrological models (GHMs) exhibit large uncertainties in simulations due to the complexity, diversity, and heterogeneity of land surface subsurface processes, as well scale dependency these processes associated parameters. Recent progress machine learning, fueled by relevant Earth observation data streams, may help overcome challenges. But learning methods are...

Journal: :Reproduction, fertility, and development 2007
Amanda R Duselis Craig Obergfell Jennifer A Mack Michael J O'Neill Quang K Nguyen Rachel J O'Neill Paul B Vrana

Crosses between two species of the rodent genus Peromyscus produce defects in both growth and development. The defects are pronounced in the hybrid placentas. Peromyscuys maniculatus (strain BW) females mated to P. polionotus (strain PO) males produce placentas half the size of the parental species, as well as growth-retarded embryos. In contrast, PO females mated to BW males result in defectiv...

Journal: :Electronic Proceedings in Theoretical Computer Science 2012

Journal: :Journal of plant physiology 2011
Xiaoying Chen Wei Li Qingtao Lu Xiaogang Wen Hongwei Li Tingyun Kuang Zhensheng Li Congming Lu

Although the wheat hybrids have often shown higher grain yields, the physiological basis of the higher yields remains unknown. Previous studies suggest that tolerance to photoinhibition in the hybrid may be one of the physiological bases (Yang et al., 2006, Plant Sci 171:389-97). The objective of this study was to further investigate the possible mechanism responsible for tolerance to photoinhi...

Journal: :Evolution; international journal of organic evolution 2010
Emily Moriarty Lemmon Alan R Lemmon

Maladaptive hybridization is hypothesized to be an important force driving the evolution of reproductive isolation between closely related species. Because the magnitude and direction of selection can vary across a life cycle, an accurate understanding of the ubiquity of reinforcement requires fitness to be estimated across the life cycle, but the literature is surprisingly depauperate of such ...

1991
Matthias Gutknecht Rolf Pfeifer Markus Stolze

Recently there has been much criticism in the AI community that knowledge based systems are not situated. We argue that trying to provide for situatedness in a conventional system wi l l lead to the so called model explosion cycle and that for most application environments adaptivity is needed for situated behavior. Cooperative systems are a solution to the model explosion cycle where adaptivit...

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