Flood control management system for reservoirs

Author name used in this publication: Chun-Tian ChengAuthor name used in this publication: K. W. Chau2003-2004 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Hydrologic uncertainty for Bayesian probabilistic forecasting model based on BP ANN

Author name used in this publication: Chun-tian ChengRefereed conference paper2007-2008 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe

An all-lag rotating-reference correlator and its efficient implementation

This paper proposes an all-lag correlator that employs a rotating reference code sequence. The proposed correlator has an advantage over the previously proposed all-lag correlator, which employs a fixed reference code, in that correlation peaks remain at the same output positions regardless of update from newly arrived data samples. Therefore, the correlation information can be more conveniently manipulated in certain applications, and the posterior signal processing requirement can be reduced. Low-complexity implementation of the correlator using a recursive form is also presented. The degree of implementation complexity is of the order N, the reference-code length.published_or_final_versio

Combining a fuzzy optimal model with a genetic algorithm to solve multi-objective rainfall–runoff model calibration

Title on pre-published version: Combining a fuzzy optimal model with a genetic algorithm to solve multiobjective rainfall-runoff model calibrationAuthor name used in this publication: C. T. ChengAuthor name used in this publication: C. P. OuAuthor name used in this publication: K. W. Chau2002-2003 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

A recursive all-lag reference-code correlator for generating odd correlations

An all-lag reference-code correlator generates an all-lag even- or odd-correlation vector at a rate equal to the rate of incoming data samples. Direct implementation of an all-lag reference-code correlator requires N parallel correlators, and the resultant degree of complexity is of the order N 2, where N is the length of the reference code. In a previous paper, a recursive form for generating all-lag even correlations was derived. In this paper, we derive the recursive form for generating all-lag odd correlations. It is shown that the corresponding correlator can be implemented with a complexity approximately equal to that of a single parallel correlator. That is, the degree of complexity of the proposed recursive all-lag reference-code correlator is of the order N. Thus, substantial reduction in the implementation complexity is achieved.published_or_final_versio

Recursive all-lag reference-code correlators

An all-lag reference-code correlator generates an all-lag even-or odd-correlation vector at a rate equal to the rate of incoming data samples. Direct implementation of an all-lag reference-code correlator requires N parallel correlators, and the resultant degree of complexity is of the order N2, where N is the length of the reference code. This paper derives two recursive forms for all-lag reference-code correlators. One generates all-lag even correlation and the other one generates all-lag odd correlation. It is shown that the proposed recursive all-lag reference-code correlator can be implemented with a complexity approximately equal to that of a single parallel correlator. That is, the degree of complexity of the proposed recursive all-lag reference-code correlator is of the order N. Thus, substantial reduction in the implementation complexity is achieved.published_or_final_versio

Clinical and pathological characteristics of patients with glomerular diseases at a university teaching hospital: 5-year prospective review

OBJECTIVE. To examine the prevalence of glomerular disease in Hong Kong. DESIGN. Prospective review. SETTING. University teaching hospital, Hong Kong. PATIENTS. All patients who presented with suspected glomerular disease from 1993 through 1997. MAIN OUTCOME MEASURES. Histopathological diagnosis from biopsy examination and clinical features of presentation. RESULTS. A total of 1629 consecutive percutaneous renal biopsies of native kidneys showed glomerular disease in 1413 cases. The most common clinical indication for renal biopsy was persistent proteinuria (n=735; 52.0%), while the most frequently found glomerular lesion was immunoglobulin A nephropathy (n=338; 23.9%). Minimal-change nephrotic syndrome (n=125; 8.8%) and immunoglobulin M nephropathy (n=11; 0.8%), were the most common glomerular diseases that presented with nephrotic syndrome. The male to female ratio for lupus nephritis was 1:14 (n=290), whereas for minimal-change nephrotic syndrome, the ratio was 1.8:1 (n=125). Immunoglobulin A nephropathy and membranous glomerulonephritis (n=117) affected approximately equal numbers of male and female patients. Familial fibrillary glomerulonephritis, a disease hitherto unknown in Hong Kong, was diagnosed in two siblings. CONCLUSION. Immunoglobulin A nephropathy was the most common glomerular disease in this survey and represents an important cause of end-stage renal failure in the Hong Kong population.published_or_final_versio

Parallel resource co-allocation for the computational grid

Author name used in this publication: K. W. Chau2006-2007 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Knowledge management system on flow and water quality modeling

Author name used in this publication: K. W. Chau2001-2002 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Inhibitory activities of vitamins on 7-ketocholesterol formation in both chemical model systems and beef patties

Technical Session V: abstract O-V-04Cholesterol Oxidation Products (COPs), produced by Cholesterol oxidation, are a family of oxidative products generated in high-temperature processing and prolonged storage. COPs could be differentiated into two distinct origins – enzymatic and non-enzymatic source. They are implicated in various food sources, and known to exert certain chemical effects like toxicity, HMG-COA reductase inhibition and atherogenesis effect on human. Considerable researches were conducted to develop strategies as to reduce the associated risk. Yet, direct evidence regarding their effects on COPs formation is still lacking. The formation pathways of COPs have partially elucidated. However, there is still controversy over the inhibition mechanism on COPs formation. The objective of the present study is to identify potent inhibitors of COPs formation from 15 vitamins using chromatographic methods in beef patties. Moreover, the roles of pyridoxamine (the most potent inhibitors) in the formation of 7-ketocholesterol is characterized. The detailed mechanism involved in cholesterol oxidation model system is elucidated. To conclude, vitamin C, A, E and PM can significantly lower the formation of 7-ketocholesterol. Their antioxidant activities only make minor contribution to their inhibitory activities. Their inhibitory activities are mainly mediated via their direct participation in Cholesterol oxidation: direct trapping of the final secondary oxidative product – 7-ketocholesterol.postprin