搜索结果: 16-30 共查到“知识库 理学 migration”相关记录74条 . 查询时间(0.093 秒)
Two phase, inward-then-outward migration of Jupiter and Saturn in the gaseous Solar Nebula
accretion, accretion disks – planets and satellites: formation – hydrodynamics – methods: numerical
2011/10/20
It has recently been shown that the terrestrial planets and asteroid belt can be reproduced if the giant planets underwent an inward-then-outward migration (the "Grand Tack"; Walsh et al 2011). Inward...
Migration mechanisms of gold nanoparticles explored in geogas of the Hetai ore district, southern China
geogas gold concelead ores gas migration
2017/4/12
Several studies have shown that gas flows (namely “geogas”) ascending from the Earth’s interior can, while passing
through concelead orebodies, assimilate ore nanoparticles and carry them to the surf...
Beyond the average: Diverse individual migration patterns in a population of mesopelagic jellyfish
Diverse individual migration patterns mesopelagic jellyfish
2014/4/4
We examined the diel behavior among the jellyfish Periphylla periphylla in Lurefjorden, Norway in a sampling
campaign and by a . 3-month continuous acoustic study. Jellyfish distribution and behavior...
Toward a more comprehensive theory of zooplankton diel vertical migration: Integrating ultraviolet radiation and water transparency into the biotic paradigm
comprehensive theory zooplankton diel vertical migration Integrating ultraviolet radiation water transparency biotic paradigm
2014/4/4
The current prevailing theory of diel vertical migration (DVM) of zooplankton is focused largely on two biotic drivers: food and predation. Yet recent evidence suggests that abiotic drivers such as da...
Linearized inverse scattering based on seismic Reverse Time Migration
Linearized inverse seismic Reverse Time Migration
2011/2/23
In this paper we study the linearized inverse problem associated with imaging of re ection seismic data.
In this paper we present a simple database definition language:that of categories and functors. A database schema is a category and a state is a set-valued functor. We show that morphisms of schemas i...
We consider a liquid bearing gas bubbles. When gas bubbles are immovably trapped in a porous matrix by surface tension forces, the dominant mechanism of transfer of gas mass becomes the diffusion of g...
Effects of Turbulence, Eccentricity Damping, and Migration Rate on the Capture of Planets into Mean Motion Resonance
planetary systems planetary systems formation — planets and satellites formation — turbulence
2010/11/11
Pairs of migrating extrasolar planets often lock into mean motion resonance as they drift inward. This paper studies the convergent migration of giant planets (driven by a circumstellar disk) and dete...
Spontaneous contractility--mediated cortical flow generates cell migration in 3-dimensional environments
Spontaneous contractility--mediated cortical flow generates migration 3-dimensional environments
2010/11/15
We present a generic model of cell motility generated by acto-myosin contraction of the cell cortex. We identify analytically dynamical instabilities of the cortex and show that they trigger spontaneo...
Type I Migration in Radiatively Efficient Discs
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/23
We study Type I migration of a planet in a radiatively efficient disk using global two dimensional hydrodynamic simulations. The large positive corotation torque is exerted on a planet by an adiabatic...
Survival probability of larval sprat in response to decadal changes in diel vertical migration behavior and prey abundance in the Baltic Sea
Survival probability of larval sprat decadal changes in diel vertical migration behavior prey abundance Baltic Sea
2014/4/17
We employed a coupled three-dimensional biophysical model to explore long-term inter- and intra-annual variability in the survival of sprat larvae in the Bornholm Basin, a major sprat spawning area in...
Expression of Human Papillomavirus Type 16 E7 Is Sufficient To Significantly Increase Expression of Angiogenic Factors But Is Not Sufficient To Induce Endothelial Cell Migration
Neovascularization inhibitors Tumor suppressor proteins Cancer
2015/5/21
Human papillomavirus 16 (HPV 16) causes cancer. Two viral oncoproteins of HPV 16, E6 and E7, are consistently expressed in these cancers. HPV 16 E6 and E7 proteins target p53 and Rb family members, re...
Zooplankton vertical migration and plasticity of pigmentation arising from simultaneous UV and predation threats
Zooplankton vertical migration plasticity of pigmentation arising simultaneous UV predation threats
2014/4/17
We assessed how zooplankton (copepods) handle the simultaneous threats of predators and ultraviolet (UV) radiation and whether they respond with changes in pigmentation, vertical migration, or both. W...
Role of oxidative stress in seasonal and daily vertical migration of three krill species in the Gulf of California
Role of oxidative stress seasonal
2014/4/17
Vertical distribution and abundance of three numerically dominant krill species (Nyctiphanes simplex,
Nematoscelis difficilis, and Euphausia eximia) were surveyed in the Gulf of California to underst...
Comparison of zooplankton vertical migration in an ice-free and a seasonally ice-covered Arctic fjord: An insight into the influence of sea ice cover on zooplankton behavior
zooplankton vertical migration sea ice
2014/4/16
We present observations of zooplankton diel vertical migration (DVM) over a period of 2 yr in an ice-free and
a seasonally ice-covered Arctic fjord. The contrasting environments permitted assessment ...