Qing-Guang Liu

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We present new algorithms based on plane rotations for tracking the eigenvalue decomposition (EVD) of a time-varying data covariance matrix. These algorithms directly produce eigenvectors in orthonormal form and are well suited for the application of subspace methods to nonstationary data. After recasting EVD tracking as a simplified rank-one EVD update(More)
BACKGROUND p130Cas (p130Crk-associated substance) is a junction protein that is important to the adhesion between cytoskeleton and extracellular matrix. Also, the adhesion molecules E-cadherin and beta-catenin play important roles in the invasiveness of carcinoma. This study was undertaken to investigate the effects of p130Cas, E-cadherin and beta-catenin(More)
Subband adaptive "ltering, which is the basis of modern acoustic echo cancellation (AEC) systems, is an important application of "lter banks in which critical sampling cannot be used in general because of decimation aliasing e!ects. This leads to the use of oversampling schemes in the "lter bank design wherein the perfect-reconstruction (PR) or near PR(More)
BACKGROUND The mechanism of regulation of KAI1, a specific tumor metastasis suppression gene, is controversial. A recent study showed that the synergism of wild-type p53 and JunB has the function of regulating the expression of KAI1, a metastasis inhibiting factor in prostate cancer cells. The wild-type p53 gene is an activator of apoptosis and is closely(More)
In this paper, a new microphone array processing technique is proposed for blind dereverberation of speech signals affected by room acoustics. It is based on the separate processing of the minimum-phase and all-pass components of delay-steered multi-microphone signals. The minimum-phase components are processed in the cepstrum-domain, where spatial(More)
BACKGROUND Failure to diagnose and treat benign biliary tract disease relatively common surgical disease may cause serious consequences. Since the introduction of B-mode ultrasonography, CT, or MRI early and accurate diagnosis of the disease has been possible. In clinical practice, however, these methods have not been adequately used. Inappropriate surgical(More)
In this paper, a new microphone array processing technique is proposed for blind dereverberation of speech signals effected by room acoustics. It is based on the separate processing of the minimum-phase and all-pass components of multi-microphone signals. The underlying motivation for the new processor is to use spatio-temporal processing over a single set(More)
In this work, we derive new algorithms for tracking the eigenvalue decomposition (EVD) of a time-varying data co-variance matrix. These algorithms have parallel structures, low operation counts and good convergence behavior. Their main feature is the use of Givens rotations to update the eigenvector estimates. As a result, orthonormality of the latter can(More)
AIM Proinflammatory cytokines TNF-alpha and IL-6 play a main role in acute pancreatitis (AP). Cytokine biosynthesis runs through two major signaling pathways at the level of proteins: nuclear transcription factor-kappaB (NF-kappaB) and p38 mitogen-activated protein kinase (p38 MAPK). The aim of the study was to investigate the effect of NF-kappaB and p38(More)
Whether an additional Braun enteroenterostomy is necessary in reducing delayed gastric emptying (DGE) after pancreaticoduodenectomy (PD) has not yet been well investigated. Herein, in this retrospective study, 395 consecutive cases of patients undergoing classic PD from 2009 to 2013 were reviewed. Patients with and without Braun enteroenterostomy were(More)