Surge tanks (STs) are important facilities for ensuring the safety of hydropower stations. Reducing ST size under premise stable mass oscillations within is main issue. First, according to basic equations oscillation a station with an ST, novel expression critical stability section deduced considering velocity head and throttle loss. Then, sensitivity each influencing factor proposed criterion ...

Predictive control methods can substantially improve the performance of Unmanned Underwater Vehicles (UUVs), particularly in shallow water environments or near free surface where wave induced disturbance are magnitude comparable to vehicle characteristic inertia. To facilitate adoption these methods, a fast estimation time evolution hydrodynamic forces acting on is required. this end, we perfor...

This document is included in the Annex of Part 7 as historical background of a well-intentioned task that was completed at too slow a pace, missing its target date for serving as a reference for other in-process IEC standards projects concerned with low-voltage surge-protective devices. For the sake of historical accuracy and perspective, the document is presented here in its draft form, includ...

1. Supported by FCT grant PRAXIS XXI/BD/13875/97 Abstract This paper presents an original approach to the problem of function hiding based on Error Correcting Codes and evaluates the security of this approach. The novelty of the technique consists in using Error Correcting Codes to hide functions instead of encrypting data vectors. This protocol mainly deals with the issue of secure evaluation ...

The effect of the nucleon recoil for antikaon-deuteron scattering is investigated in the framework of effective field theory. In particular, we concentrate on the calculation of the nucleon recoil effect for the double-scattering process. It is shown that the leading correction to the static term that emerges at order ξ with ξ = MK/mN vanishes due to a complete cancellation of individually larg...

Abstract Flow separation will occur in the nacelle inlet under crosswind operation, which result engine intake distortion and even surge. To study reference characteristics of flow field short tank influence crosswind, this paper observed cloud map total price loss coefficient by changing deflection Angle velocity, made a qualitative analysis pressure degree, then calculated average index, cond...