Chaotic transients occur in many experiments including those in fluids, in simulations of the plane Couette flow, and in coupled map lattices. These transients are caused by the presence of chaotic saddles, and they are a common phenomenon in higher dimensional dynamical systems. For many physical systems, chaotic saddles have a big impact on laboratory measurements, but there has been no way t...

• Summary.-Low-speed tests have been carried out on a family of three single-stage compressors of different diameter ratios. The simple blade design tested showed considerable variations of performance as the diameter ratio was decreased from 0.65 to 0.35 but most of these variations are predictable by simple means and it is expected that they may be partially avoided by appropriate design meth...

Context. An important benchmark for current observational techniques and theoretical modeling of exoplanet atmospheres is the transit of Venus (ToV). Stellar activity and, in particular, convection-related surface structures, potentially cause fluctuations that can affect the transit light curves. Surface convection simulations can help interpreting the ToV as well as other transits outside our...

In this paper, CM noise suppresion and magnetic elements winding loss optimization design of a cascade power module based on GaN are carried out (the front stage is buck converter, the second LLC resonant converter). To suppress noise, converter adopts planar stagger reverse coupling inductance, by establishing model conduction path model, equivalent capacitance can effectively reduced, thus fu...

Unstable invariant sets are important to understand mechanisms behind many dynamically important phenomenon such as chaotic transients which can be physically relevant in experiments. However, unstable invariant sets are nontrivial to find computationally. Previous techniques such as the PIM triple method [Nusse & Yorke, 1989] and simplex method variant [Moresco & Dawson, 1999], and even the st...

This paper presents an ultra-wideband (UWB) low noise amplifier (LNA) consuming 2.2-mW core dc power for 6-8.5GHz wireless applications. A common-gate input stage is cascaded with a common-source second stage to perform input impedance matching and wideband stagger-tuning amplification, while the current-reuse topology minimizes the dc power dissipation. The design method used to achieve flat-g...

The paper presents a method for gradual forgetting, which is applied for learning drifting concepts. The approach suggests the introduction of a time-based forgetting function, which makes the last observations more significant for the learning algorithms than the old ones. The importance of examples decreases with time. Namely, the forgetting function provides each training example with a weig...

Mutations of the drop-dead gene in Drosophila melanogaster lead to striking early death of the adult animal. At different times, after emergence from the pupa, individual flies begin to stagger and, shortly thereafter, die. Anatomical examination reveals gross neuropathological lesions in the brain. The life span of flies mutant for the drop-dead gene is four to five times shorter than for norm...