Xem 1-5 trên 5 kết quả Variable current sources
  • With the rapid development of wireless communication networks, it is expected that fourth-generation (4G) mobile systems will appear in the market by the end of this decade. These systems will aim at seamlessly integrating the existing wireless technologies on a single handset: together with the traditional power/size/price limitations, the mobile terminal should now comply with a multitude of wireless standards.

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  • The objective of this study is to develop an early‐warning system (EWS) for identifying systemic banking risk, which will give policymakers and supervisors time to prevent or mitigate a potential financial crisis. It is important to forecast—and perhaps to alleviate—the pressures that lead to systemic crises, which are economically and socially costly and which require significant time to reverse (Honohan et al., 2003). The current U.S.

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  • A broad literature on theoretical and empirical nance concludes that major price adjust- ment of liquid assets happens at least within one day. This is formalised in the random walk hypothesis, which implies returns uncorrelated with lagged variables. Whether or not this hypothesis is exactly ful lled, in daily data most commonalities in terms of cross- correlations appear to be contemporaneous.

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  • Electromechanical mobility analogies [42] Mechanical parameter Electrical parameter Voltage Current Conductance Inductance Capacitance Inductance per unit length Capacitance per unit length Characteristic impedance Impedance Admittance Short circuit Open circuit Current Voltage Variable Lumped network elements Transmission lines Immitances Source immitances Velocity, angular velocity Force, torque Damping Compliance Mass, mass moment of inertia Compliance per unit length Mass per unit length Characteristic mobility Mobility Impedance Clamped point Free point Force Velocity ABCD matrix...

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  • The different sources of potential confounding in time series studies of air pollution and mortality can be broadly classified as either measured or unmeasured. Important measured confounders include weather variables such as temperature and dewpoint temperature. Daily temperature measurements are readily available for metropolitan areas in the USA and numer- ous studies have demonstrated a relationship between temperature and mortality which is gen- erally positive for warm summer days and negative for cold winter days (e.g. Curriero et al. (2002)).

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