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Received 10 February 2009; Revised 25 June 2009; Accepted 25 September 2009 Recommended by K. L. Teo Consider the DC programming problem PA infx∈X{f x − g Ax }, where f and g are proper convex functions defined on locally convex Hausdorff topological vector spaces X and Y, respectively, and A is a linear operator from X to Y . By using the properties of the(More)
Large air cooling fan system is made up of many fans. The dynamic response of the fan bridge truss is very complicated when the fans are running simultaneously. Four fans and their supporting structures are selected from the fan system as analysis object. By finite element method, vibration response produced by 15 kinds of the combinations of running of(More)
The estimation of Laplacian factor is a crucial part of speech enhancement algorithms using Laplacian model priori. Classical methods for the estimation of this parameter suffer from the residual noise or time delay bias. In this paper, a novel algorithm called two-step technique for the estimation of Laplacian factor is proposed in discrete cosine(More)
Changes in the density and species composition of planktonic rotifers as well as their relationship to several environmental variables were studied at Dadian Lake, a shallow subtropical lake, which was completely dredged and reconstructed. Samples were taken monthly (2006-2009) at five stations. The total rotifer abundance exponentially declined and reached(More)
In this paper, we propose a frequency-domain speech enhancement algorithm with phase estimation, in which the speech model is modeled by a Gaussian mixture model (GMM) in the log-spectral domain and two closed-form log-spectral amplitude estimators for speech and noise are derived directly by using a Mixture-Maximum (MIXMAX) model. Because the accurate(More)
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