搜索结果: 1-15 共查到“理学 switching”相关记录30条 . 查询时间(0.077 秒)
In Harm's Way:Wolves May Not Risk 'Prey Switching' say USU Ecologists
Wolves May Not Risk Prey Switching USU Ecologists
2017/4/27
Ecologists have long observed predators pursue disproportionately more of a plentiful prey species, and less of scarce prey, but change to the latter if it becomes relatively more abundant. Known as “...
Fast-track control accelerates switching of quantum bits
Fast-track control accelerates switching quantum bits
2016/12/27
From laptops to cellphones, today’s technology advances through the ever-increasing speed at which electric charges are directed through circuits. Similar advances can happen in the emerging field of ...
By switching 'bait,'IU biologists trick plants' bacterial defense into attacking virus
bait IU biologists plants bacterial defense attacking virus
2016/2/23
Scientists at Indiana University have modified a plant gene that normally fights bacterial infection to confer resistance to a virus.The method, described in a paper to be published Feb. 12 in the jou...
In this paper we analyze the average backlog in a combined input-output queued switch using a maximal siz e matching scheduling algorithm. We compare this average backlog to the average backlog achiev...
本文假定风险资产的价格满足马尔可夫调制的几何Lė；vy过程，其中市场利率、风险资产的平均回报率、波动率以及跳跃强度和幅度都依赖于市场的经济状态，这些经济状态由一连续时间马尔可夫链描述. 由于该模型下的市场是不完备的，在本文中我们首先采用局部风险最小化方法获得了欧式未定权益的最优套期保值策略. 接着，本文给出了一个具体的例子，得到了马尔科夫调制的几何布朗运动模型下的最优套期保值策略的数值结...
Switching between oscillations and homeostasis in competing negative and positive feedback motifs
negative feedback positive feedback oscillation noise circadian rhythm
2012/5/2
We analyze a class of network motifs in which a short, two-node positive feed- back motif is inserted in a three-node negative feedback loop. We demonstrate that such networks can undergo a bifurcatio...
Thermochromism of Silver Oxide for Optical Switching Layers in Volumetric Optical Disks
phase change volumetric optical disk dual layer optical disk optical switching layer thermo-chromatic material thermochromism silver oxide
2011/11/28
For reading and writing on a lower targeted recording layer ofvolumetric optical disks, transmitted laser power is decreased by absorption and reflection ofthe upper layers. Thus, a layer ofthermo-chr...
Investment/consumption problem in illiquid markets with regimes switching
Optimal consumption liquidity effects regime-switching models viscosity solutions integro-differential system
2011/10/9
Abstract: We consider an illiquid financial market with different regimes modeled by a continuous-time finite-state Markov chain. The investor can trade a stock only at the discrete arrival times of a...
Attojoule all-optical switching with a single quantum dot
Attojoule all-optical single quantum dot Quantum Physics
2011/8/17
Abstract: We experimentally investigate the dynamic nonlinear response of a single quantum dot (QD) strongly coupled to a photonic crystal cavity-waveguide structure. The temporal response is measured...
Pulsar state switching, timing noise and free precession
dense matter – stars: neutron – stars: oscillations – stars: pulsars –stars: rotation
2011/10/10
Recent radio pulsar observations have shown that a number of pulsars display interesting long term periodicities in their spin-down rates. At least some of these pulsars also undergo sharp changes in ...
On Investment-Consumption with Regime-Switching
Portfolio optimization time inconsistency equilibrium policies regime-switching discounting
2011/8/31
Abstract: In a continuous time stochastic economy, this paper considers the problem of consumption and investment in a financial market in which the representative investor exhibits a change in the di...
A Gel'fand-type spectral radius formula and stability of linear constrained switching systems
Joint/generalized spectral radius Gel’fand-type spectral-radius formula linear switched system asymptotic stability
2011/8/22
Abstract: Using ergodic theory, in this paper we present a Gel'fand-type spectral radius formula which states that the joint spectral radius is equal to the generalized spectral radius for a matrix mu...
Coupling between switching regulation and torque generation in bacterial flagellar motor
Supramolecular assembly switching regulation and torque generation bacterial flagellar motor
2011/8/26
The bacterial flagellar motor plays a crucial role in both bacterial locomotion and chemotaxis. Recent experiments reveal that the switching dynamics of the motor depends on the motor rotation speed, ...
Possibility of exchange switching ferromagnet - antiferromagnet junctions
Possibility of exchange ferromagnet - antiferromagnet junctions
2010/11/24
Current flowing is studied in magnetic junctions consisting of a ferromagnetic metal (FM), antiferromagnetic conductor (AFM) and a nonmagnetic metal closing the electric circuit. The FM layer with hig...
Active switching in metamaterials using polarization control of light
mimic of electromagnetically induced transparency plasmon hybridization
2010/11/4
We demonstrate on-demand control of localized surface plasmons in metamaterials by means of incident light polarization. An asymmetric mode, selectively excited by s-polarized light, interfere destru...