نتایج جستجو برای: term evolution
تعداد نتایج: 904762 فیلتر نتایج به سال:
The ultracool M-dwarf star TRAPPIST-1 is surrounded by seven planets configured in a resonant chain. Transit-timing variations have shown that the are caught multiple three-body resonances and their orbits slightly eccentric, probably caused forcing. current values of eccentricities could be remnant from formation. Here we run numerical simulations using fictitious forces trapping fully-grown a...
The present distribution of intact objects is a good proxy to quantify the catastrophic collision risk and consequences in the coming decades. The results of a large number of long term simulations of the LEO environment perturbed by the collisional fragmentation of massive objects are used to identify the main driving parameters of the long term collisional evolution of the debris population a...
A novel multiband multiple-input-multiple-output (MIMO) antenna system is proposed. The MIMO antenna system consists of two antenna elements, each of which comprises of three radiators: a driven monopole, an S-shaped strip and an inverted F-shaped strip and occupies footprint of 15x18.5x0.8 mm3 only. The driven monopole acts as a quarter-wave monopole and stimulate higher mode resonance. The tw...
Following previous models describing a quasi steady state (QSS) for the evolution of HIV infection and AIDS[1, 2], we have developed a larger formalism simulating the long-term evolution of the QSS[3]. We show that the long-term evolution of AIDS cannot be explained by the destruction alone of CD4 T cells, either directly or indirectly. The destruction of CD4 T cells can lead only to a QSS with...
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