搜索结果: 1-15 共查到“理学 Persistence”相关记录31条 . 查询时间(0.106 秒)
Persistence of planetary wave type oscillations in the mid-latitude ionosphere
ionosphere atmosphere interaction mid-latitude ionosphere ionospheric disturbances atmospheric waves
2015/9/8
Planetary wave type oscillations have been observed in the lower and middle atmosphere but also in the ionosphere,
including the ionospheric F2 layer. Here we deal with the oscillations in foF2 analy...
Small-Scale Planktonic Structure: Persistence and Trophic Consequences
Persistence Trophic Consequences
2015/8/6
Most conventional sampling methods limit our ability to resolve planktonic distributions over vertical scales less than a few meters. Estimates of in situ biological rates also are limited by equipmen...
Correlated Local Bending of a DNA Double Helix and Its Effect on DNA Flexibility in the Sub-Persistence-Length Regime
Correlated Local Bending a DNA Double Helix Effect on DNA Flexibility Sub-Persistence-Length Regime
2014/9/24
Mechanical characteristics of DNA in the sub-persistence-length (lP ≈150 base pairs) regime are vital to many of its biological functions but not well understood. Recent experimental studies in this r...
Methionine synthase interreplacement in diatom cultures and communities: Implications for the persistence of B12 use by eukaryotic phytoplankton
Methionine synthase interreplacement diatom cultures communities: Implications persistence of B12 eukaryotic phytoplankton
2014/4/2
Three proteins related to vitamin B12 metabolism in diatoms were quantified via selected reaction monitoring mass spectrometry: B12-dependent and B12-independent methionine synthase (MetH, MetE) and a...
From wing to wing: the persistence of long ecological interaction chains in less-disturbed ecosystems
wing ecological interaction chains
2015/11/13
Human impact on biodiversity usually is measured by reduction in species abundance or richness. Just as
important, but much more difficult to discern, is the anthropogenic elimination of ecological i...
Persistence and Uncertainty in the Academic Career
Persistence Uncertainty Academic Career Physics and Society
2012/4/19
Understanding how institutional changes within academia may affect the overall potential of science requires a better quantitative representation of how careers evolve over time. Since knowledge spill...
On the Scaling of Langevin and Molecular Dynamics Persistence Times of Non-Homogeneous Fluids
Molecular Dynamics Langevin Equation Diffusion constant Mean Exit Time mean first passage time persistence probability
2011/8/18
Abstract: The solution of the Langevin equation of an anisotropic fluid [Colmenares P. J; L\'opez F. and Olivares-Rivas W., Phys. Rev E. 2009, 80061123] allowed the evaluation of the position dependen...
Normally Elliptic Singular Perturbations and Persistence of Homoclinic Orbits
Normally Elliptic Singular Perturbations Persistence of Homoclinic Orbits
2011/1/14
We consider a dynamical system, possibly infinite dimensional or non-autonomous, with fast and slow time scales which is oscillatory with high frequencies in the fast directions. We first derive and j...
Defining and Computing Topological Persistence for 1-cocycles
Topological Persistence 1-cocycles
2011/2/22
The concept of topological persistence, introduced recently in computational topology, finds applications in studying a map in relation to the topology of its domain. Since its introduction, it has be...
A Missed Persistence Property for the Euler Equations, and its Effect on Inviscid Limits
Persistence Property the Euler Equations
2010/11/11
We consider the problem of the strong convergence, as the viscosity goes to zero, of the solutions to the three-dimensional evolutionary Navier-Stokes equations under a Navier slip-type boundary condi...
Weak Dynamic Non-Emptiability and Persistence of Chemical Kinetics Systems
chemical kinetics dynamically non-emptiable siphons complex balanced
2010/11/29
A frequently desirable characteristic of chemical kinetics systems is that of persistence, the property that no initially present species may tend toward extinction. It is known that solutions of dete...
The production and persistence of ΣRONO2 in the Mexico City plume
ΣRONO2 the Mexico City plume
2010/8/16
Alkyl and multifunctional nitrates (RONO2, ΣANs) have been observed to be a significant fraction of NOy in a number of different chemical regimes. Their formation is an important free radical chain te...
Quantifying discontinuity orientation and persistence on high mountain rock slopes and large landslides using terrestrial remote sensing techniques
discontinuity orientation high mountain rock slopes remote sensing techniques
2009/12/16
This paper describes experience gained in the application of terrestrial digital photogrammetry and terrestrial laser scanning for the characterization of the structure of high mountain rock slopes an...
Changes in the flood hazard in Germany through changing frequency and persistence of circulation patterns
flood hazard changing frequency persistence circulation patterns
2009/12/8
The link between trends in circulation patterns and trends in the flood magnitude is studied for 122 meso-scale catchments in Germany for a period of 52 years (1951–2002). Flood trends, significant at...
Quantifying discontinuity orientation and persistence on high mountain rock slopes and large landslides using terrestrial remote sensing techniques
discontinuity orientation persistence high mountain rock slopes large landslides
2009/12/8
This paper describes experience gained in the application of terrestrial digital photogrammetry and terrestrial laser scanning for the characterization of the structure of high mountain rock slopes an...