To accurately diagnose the mechanical failure of the fan, two diagnostic methods based on the wavelet packet energy feature and sample entropy feature are proposed. Vibration signals acquisition of 13 kinds of running states are achieved on the 4-73 No. 8D centrifugal fan test bench. The wavelet packet energy feature vector of each vibration signal is rapidly extracted through the wavelet packe...

Article history: Received 31 October 2007 Revised 3 March 2011 Available online 10 April 2013

We prove that the correlation of a depth-d unbounded fanin circuit of size S with parity of n variables is at most 2−Ω(n/(log S) ).

A fundamental problem in the design of speed-independent asynchronous circuits is the decomposition or splitting up of high-fanin operators into two or more lower-fanin operators. In this paper, we develop general techniques to decided whether a particular decomposition of an arbitrary state-holding or combina-tional element into two elements with an isolated internal signal is correct. These t...

We consider depth-3 unbounded fanin threshold circuits. Gates are usual threshold functions T n k which compute 1 ii at least k of the inputs are equal to 1; the minimum minfk; n ? k + 1g is the threshold value of this gate. We show that the function T n k cannot be computed by a small depth-3 threshold circuit with threshold values of its gates much smaller than k:

In this study, effect of adding in SiO2 nanoparticle in base fluid (water) in car radiator is investigated experimentally. Radiators are compact heat exchangers that optimized and evaluated by considering different working conditions. Car\'s cooling system, plays an important role in vehicle\'s performance, consists of two main parts, known as radiator and fan. Radiators are compact heat exchan...

This article presents a formulation of the fan theorem in Martin-Löf’s type theory. Starting from one of the standard versions of the fan theorem we gradually introduce reformulations leading to a final version which is easy to interpret in type theory. Finally we describe a formal proof of that final version of the fan theorem.

There is concern that cotton gins may serve as loci for reintroduction of boll weevils, Anthonomus grandis grandis Boheman, to eradicated or suppressed zones when processing weevil-infested cotton from neighboring zones. Previous work has shown that virtually all weevils entering the gin in the seed cotton will be removed before they reach the gin stand. Those not killed by the seed cotton clea...

but also improves the uniformity of the spray pattern. Turbulence chamber nozzles are available in a turbo flood tip and now in the turbo flat-fan design. The turbo flatfan design shows great improvements in pattern uniformity when compared to the extended range flat-fan and other drift reduction flat-fan designs. In addition, the turbo flat-fan has significantly reduced the percentage of drift...