نتایج جستجو برای: their initial conditions
تعداد نتایج: 3154868 فیلتر نتایج به سال:
We consider gravitational clustering from primoridal non-Gaussian fluctuations provided by a χ model, as motivated by some models of inflation. The emphasis is in signatures that can be used to constrain this type of models from large-scale structure galaxy surveys. Non-Gaussian initial conditions provide additional non-linear couplings otherwise forbidden by symmetry that cause non-linear grav...
This paper explores the effect of initial weight selection on feed-forward networks learning simple functions with the back-propagation technique. We first demonstrate, through the use of Monte Carlo techniques, that the magnitude of the initial condition vector (in weight space) is a very significant parameter in convergence time variability. In order to further understand this result, additio...
This note is a summary of the work reported in hep-th/9801073. We give a brief discussion of the fine tuning problem in pre-big bang cosmology. We use the flatness problem as our test case, and in addition to the exact numerical limits on initial conditions, we highlight the differences between pre-big bang and standard inflation. The main difference is that in pre-big bang the universe must be...
We enumerate two-dimensional walks inside a band parallel to an axis of symmetry, using an algebraic approach. The restrictions along the boundary lines can be more complicated than just initial values of zeroes; we consider recursive initial values prescribing which predecessors a position at the boundary can have. More general, the initial conditions are expressed by certain linear operators ...
Sensitivity experiments using a coupled model initialized from analysed atmospheric and oceanic observations are used to investigate the potential for interannual-to-decadal predictability. The potential for extending seasonal predictions to longer time scales is explored using the same coupled model configuration and initialization procedure as used for seasonal prediction. It is found that, d...
We perform a numerical investigation of the field evolution in the smooth hybrid inflationary model. We find that for almost all the examined initial values we do get an adequate amount of inflation. Our results show that the model is ”natural” and satisfactory.
Using state-level data from the United States, we find that initial legal systems in territories originally settled by Great Britain – a common law country – and in territories originally settled by France, Spain, and Mexico and the Netherlands all civil law countries have persistent effects on the quality of contemporary institutions. In order to explain these findings, we develop a transplant...
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