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Quasi-Optimized Overlapping Schwarz Waveform Relaxation Algorithm for PDEs with Time-Delay

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Communications in Computational Physics 2013年第8期14卷 780-800页

作者： shu-lin wu Ting-Zhu Huang School of Mathematical Sciences University of Electronic Science and Technology of ChinaChengduSichuan 610054China School of Science Sichuan University of Science and EngineeringZigongSichuan 643000China

Schwarzwaveformrelaxation(SWR)algorithmhas been investigated deeply and widely for regular time dependent *** for time delay problems,complete analysis of the algorithm is *** this paper,by using the reaction diffusion equations with a constant discrete delay as the underlying model problem,we investigate the convergence behavior of the overlapping SWR algorithm with Robin transmission *** key point of using this transmission condition is to determine a free parameter as better as possible and it is shown that the best choice of the parameter is determined by the solution of a min-max problem,which is more complex than the one arising for regular problems without *** propose new notion to solve the min-max problem and obtain a quasi-optimized choice of the parameter,which is shown efficient to accelerate the convergence of the SWR *** results are provided to validate the theoretical conclusions.

关键词： Schwarz method waveform relaxation time delay min-max problem

Prevalence and incidence of heart failure among community in China during a three-year follow-up

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Journal of Geriatric Cardiology 2023年第4期20卷 284-292页

作者： Lu FU Jun-Rong JIANG Wei-Dong lin Hui-Yi LIU shu-Yu JIN Xing-Dong YE Yan-lin CHEN Si-Jia PU Yang LIU Shang-Fei HE shu-lin wu Hai DENG Yu-Mei XUE Department of Cardiology Guangdong Cardiovascular InstituteGuangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhouChina The Second School of Clinical Medicine Southern Medical UniversityGuangzhouChina School of Medicine South China University of TechnologyGuangzhouChina Department of Cardiology the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina Guangdong Provincial Key Laboratory of Clinical Pharmacology Research Center of Medical SciencesGuangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhouChina Qinghai Province Cardio Cerebrovascular Disease Specialist Hospital XiningChina

BACKGROUND Epidemiological surveys on heart failure(HF)in Chinese community are relatively *** study aimed to estimate the prevalence and incidence of HF among community residents in southern *** Baseline data of this prospective study was collected from 2015 to 2017 among 12,013 permanent residents aged≥35years in Guangzhou,*** same survey process was carried out for individuals aged≥65 years after a three-year *** The overall prevalence of HF in community residents aged≥35 years was 1.06%.Male had significantly higher risk of HF prevalence[odds ratio(OR)=1.50,P=0.027].The gender-adjusted risk of HF was 1.48 times higher per 10 years *** prevalence was statistically associated with atrial fibrillation,valvular heart disease,hypertension and chronic obstructive pulmonary disease after adjusting for age and gender(OR=8.30,5.17,1.11,2.28,respectively;all P<0.05).HF incidence in individuals aged≥65 years were 847 per 100,000 *** atrial fibrillation,valvular heart disease,and diabetes mellitus were risk factors for HF incidence for individuals aged≥65 years adjusting for age and gender(OR=5.05,3.99,2.11,respectively;all P<0.05).Besides,residents with new-onset atrial fibrillation and myocardial infarction were at significantly higher risk of progression to HF(OR=14.41,8.54,respectively;all P<0.05).CONCLUSIONS Both pre-existing and new-onset cardiovascular diseases were associated with HF incidence in southern *** of related cardiovascular diseases may be helpful to reduce the incidence of HF.

关键词： prevalence cardiovascular incidence

Progress in preparation of AlN-reinforced magnesium matrix composites:A review

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China Foundry 2024年第1期21卷 1-10页

作者： Lu Chen shu-lin Lü Di-jia Zhao Wei Guo Jian-yu Li shu-sen wu State Key Lab of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

As a ceramic material,AlN has very good thermophysical and mechanical *** addition,AlN is an effective refining agent for Mg alloys because it has a lattice constant similar to that of ***,AlN is an ideal reinforcement for magnesium matrix composites(MMCs),and is attracting increasing *** review addresses the development of preparation technologies for AlN-reinforced Mg matrix *** mainstream preparation techniques include stir casting,melt infiltration,powder metallurgy,and in-situ *** addition,the advantages and disadvantages of these techniques are analyzed in depth,and it is pointed out that the next direction for the preparation of high-performance AlN-reinforced MMCs is less aluminization and multiple technologies integration.

关键词： AlN MMCs preparation thermophysical property mechanical property

Left atrial enlargement and non-paroxysmal atrial fibrillation as risk factors for left atrial thrombus/spontaneous Echo contrast in patients with atrial fibrillation and low CHA2DS2-VASc score

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Journal of Geriatric Cardiology 2020年第3期17卷 155-159页

作者： Wei-Dong lin Yu-Mei XUE Fang-Zhou LIU Xian-Hong FANG Xian-Zhang ZHAN Hong-Tao LIAO Gary Tse shu-lin wu Guangdong Cardiovascular Institute Guangdong General HospitalGuangzhouChina Department of Medicine and Therapeutics Faculty of MedicineChinese University of Hong KongHong KongChina Li Ka Shing Institute of Health Sciences Faculty of MedicineChinese University of Hong KongHong KongChina

Objective To determine the risk factors for thromboembolism in lower risk patients with non-valvular atrial fibrillation(AF)and low CHA2DS2-VASc scores,which remain *** We retrospectively analyzed the baseline clinical characteristics,routine laboratory parameters,and echocardiographic measurements of 705 patients(71.1%male;mean age:52.10±9.64 years)with low CHA2DS2-VASc score(0 or 1;1 point for female sex)out of 1346 consecutive patients with non-valvular AF who underwent transesophageal echocardiography(TEE)at Guangdong Cardiovascular Institute between January 2013 and December *** Patients with left atrial thrombus(LAT)or spontaneous echo contrast(SEC)on TEE(24/705,4%)showed a higher incidence rate of vascular disease(54.2%vs.32.9%,P=0.045)and non-paroxysmal AF(79.2%vs.29.4%,P<0.001),larger left atrial diameter(43.08±4.59 vs.36.02±5.53 mm,P<0.001),and lower left ventricular ejection fraction(58.23±8.82%vs.64.15±7.14%,P<0.001)than those *** logistic regression analysis identified left atrial diameter[odds ratio(OR)=1.171,95%confidence interval(CI):1.084–1.265,P<0.001]and non-paroxysmal AF(OR=3.766,95%CI:1.282–11.061,P=0.016)as independent risk factors for LAT/*** ROC curve analysis,a left atrial dimeter cutoff of 37.5 mm yielded 95.0%sensitivity and 62.7%specificity(AUC:0.847,P<0.0001,95%CI:0.793–0.914).Conclusion In patients with non-valvular AF with low CHA2DS2-VASc score,the presence of LAT or SEC was associated with left atrial enlargement,which had moderate predictive value,and non-paroxysmal AF.

关键词： Atrial fibrillation Left atrial diameter Left atrial spontaneous echo contrast Left atrial thrombus

Influence of chemical dealumination on the properties of USY zeolite

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Chinese Journal of Chemistry 1993年第2期11卷 105-112页

作者： BAO,shu-lin wu,Peng XU,Qin-Hua Department of Chemistry,Nanjing University,Nanjing 210008 Department of Chemistry Nanjing University Nanjing 210008

Three series of dealuminated Y zeolites have been prepared by chemical extraction of hydrothermally dealuminated Y zeolite(USY)with H_2Na_2EDTA,HCl and H_*** unit cell constant,mesopore distribution,acidity and extraframework aluminum(EFAL)of the zeolites were studied with XRD,chemical analyses,adsorption,IR and NH_3-TPD techniques. It was shown that H_2Na_2EDTA only removed EFAL species deposited in the pores of USY, by contrast,HCl and H_4EDTA extract both extraframework and framework aluminum,and make the zeolite framework further *** tests gave evidence that a second- ary pore system exists in these dealuminated zeolites.H_2Na_2EDTA extraction increased both micropore and mesopore volumes,but after HCl and H_4EDTA treatments,new mesopores formed and the micropore volume was *** pyridine-IR and NH_3-TPD measurements demon- strated that EFAL had no evident contribution to the zeolite acidity.

关键词： USY

Automated Ultra-High Density Mapping in atrial fibrillation hybrid procedure

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Journal of Geriatric Cardiology 2018年第5期15卷 379-381页

作者： Fang-Zhou LIU Hong-Tao LIAO Jian LIU Yu-Mei XUE Xian-Zhang ZHAN Wei-Dong lin Hui-Ming GUO shu-lin wu Department of Cardiology Atrial fibrillation center Guangdong Cardiovascular Institute Guangdong General Hospital Guangdong Province Key Labora- tory of Structural Heart Disease Guangdong Academy of Medical Sciences Guangdong China Department of Cardiac surgery Atrial fibrillation center Guangdong Cardiovascular Institute Guangdong General Hospital Cruangdong Province Key Laboratory of Structural Heart Disease Guangdong Academy of Medical Sciences Guangdong China

A 70-year-old female visited our hospital due to a 5-year history of long-standing persistent atrial fibrillation （LSPsAF） refractory to medical treatment. Chest x-ray and echocardiography were free of abnormalities and did not detect manifest structural heart disease. A hybrid AF pro- cedure （Epicardial thoracoscopic ablation ＋ appendage re- section, and endocardial catheter ablation） was referred to patient.

关键词： Atrial fibrillation Hybrid Ultra-high density

First-principles study on the diffusion behavior of Cs and I in Cr coating

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Nuclear Science and Techniques 2024年第6期35卷 177-188页

作者： shu-Ying lin Xiao-Jing Li lin-Bing Jiang Xi-Jun wu Hui-Qin Yin Yu Ma Wen-Guan Liu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Cs and I can migrate through fuel-cladding interfaces and accelerate the cladding corrosion process induced by the fuel-cladding chemical *** coating has emerged as an important candidate for mitigating this chemical *** this study,first-principles calculations were employed to investigate the diffusion behavior of Cs and I in the Cr bulk and grain boundaries to reveal the microscopic interaction mitigation mechanisms at the fuel-cladding *** interaction between these two fission products and the Cr coating were studied systematically,and the Cs and I temperature-dependent diffusion coefficients in Cr were obtained using Bocquet’s oversized solute-atom model and Le Claire’s nine-frequency model,*** results showed that the Cs and I migration barriers were significantly lower than that of Cr,and the Cs and I diffusion coefficients were more than three orders of magnitude larger than the Cr self-diffusion coefficient within the temperature range of Generation-IV fast reactors(below 1000 K),demonstrating the strong penetration ability of Cs and ***,Cs and I are more likely to diffuse along the grain boundary because of the generally low migration barriers,indicating that the grain boundary serves as a fast diffusion channel for Cs and I.

关键词： First-principles calculation Fuel cladding chemical interaction Cr coating Fission product Diffusion Grain boundary

Predictive value of serum uric acid on left atrial spontaneous echo contrast in non-valvular atrial fibrillation patients

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Journal of Geriatric Cardiology 2015年第6期12卷 641-646页

作者： Hong-Tao LIAO Fang-Zhou LIU Yu-Mei XUE Xian-Zhang ZHAN Xian-Hong FANG Jun HUANG Wei WEI Fang RAO Hai DENG Yang LIU Wei-Dong lin shu-lin wu Department of Cardiovascular Guangdong Cardiovascular Institute Guangdong General Hospital Guangdong Academy of Medical Science GuangzhouGuangdong China Research Center of Medical Science Guangdong General Hospital Guangdong Academy of Medical Science Guangzhou Guangdong China

Objectives To investigate the relationship between serum uric acid （SUA） and left atrial spontaneous echo contrast （LA-SEC） in non-valvular atrial fibrillation （AF） patients. Methods We retrospectively screened 1,476 consecutive hospitalized patients with AF who underwent transesophageal echocardiography prior to radiofrequency catheter ablation, left atrial appendage closure and electric cardiover- sion at Guangdong General Hospital. Data on the clinical baseline characteristics of all patients were collected from electronic medical re- cords and analyzed. Results After exclusion of patients with left atrial thrombus, 1,354 patients entered into present study and 57 were LA-SEC. The mean female SUA level （380.88 ± 94.35 μmol/L vs. 323.37 ± 72.19μmol/L, P 〈 0.001） and male SUA level （416.97 ± 98.87 μmol/L vs. 367.88 ＋ 68.50 μmol/L, P = 0.008） were both significantly higher in patients with LA-SEC than in the controls. The mean left atrial dimension （41.32 ± 5.12 mm vs. 36.12 ± 5.66 mm, P 〈 0.001） was markedly larger in patients with LA-SEC. In multivariate regression analysis, SUA level was an independent risk factor for LA-SEC （OR： 1.008, P 〈 0.001）. In receiver operating characteristic curve analysis, the corresponding area under the curve for SUA predicting LA-SEC in female and male were 0.670 and 0.657, respectively. SUA level is significantly higher in non-valvular AF patients with LA-SEC. Conclusion SUA level is an independent risk factor and has a moderate predictive value for LA-SEC among non-valvular AF patients in Southern China.

关键词： Atrial fibrillation Echo contrast Left atrium Serum uric acid Thromboembolic events

Advancements in animal nutrition: The interplay of feed enzymes, gut health, and nutrient supply in poultry and pig production——A tribute to Professor Mingan Choct's 30-year scientific legacy

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Animal Nutrition 2024年第2期17卷 373-375页

作者： shu-Biao wu School of Environmental and Rural Science University of New England

Animal production is a significant protein source for human consumption(Salter and Lopez-Viso, 2021). The production of monogastric animals has grown enormously in recent decades,particularly of poultry and swine(Rauw et al., 2020). Such growth is attributed to the progress in animal nutrition, disease control,and genetic improvement in response to the global demand for meat(Kumar et al., 2023) and, of course, the tireless efforts of scientists working in the area for the past decades. Among them is Professor Mingan Choct, a monogastric animal nutritionist at the University of New England. He has dedicated his entire academic career to the field, significantly contributing to monogastric animal research and industry. To honour his contribution and celebrate his retirement, we organized a special issue in Animal Nutrition with contributions from a group of prominent researchers in monogastric animal nutrition and health. In this special issue, we published reviews and research papers, 8 in total, with a focus on the nutrition and health of monogastric production animals.

关键词： BROILER-CHICKENS WHEAT PENTOSANS NET ENERGY FUNCTIONAL INTERACTIONS MANNO-OLIGOSACCHARIDES GROWTH-PERFORMANCE DIETARY THREONINE SUPPLEMENTATION