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damage detection in steel plates using feed-forward neural network coupled with hybrid particle swarm optimization and gravitational search algorithm

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2021年第6期22卷 467-480页

作者： Long Viet HO duong Huong NGUYEN Guido de ROECK Thanh BU-TIEN Magd Abdel WAHAB Soete Laboratory Department of Electrical EnergyMetalsMechanical Constructions and SystemsFaculty of Engineering and ArchitectureGhent UniversityGent 9000Belgium department of Bridge and Tunnel Engineering Faculty of Civil EngineeringUniversity of Transport and CommunicationsHo Chi Minh 700000Vietnam department of Bridge and Tunnel Engineering Faculty of Bridge and RoadNational University of Civil EngineeringHanoiVietnam department of Civil Engineering Structural MechanicsKatholieke Universiteit LeuvenB-3001 LeuvenBelgium department of Bridge and Tunnel Engineering Faculty of Civil EngineeringUniversity of Transport and CommunicationsHanoiVietnam division of Computational Mechanics Ton Due Thang UniversityHo Chi Minh CityVietnam Faculty of Civil Engineering Ton Due Thang UniversityHo Chi Minh CityVietnam

Over recent decades,the artificial neural networks(ANNs)have been applied as an effective approach for detecting damage in construction ***,to achieve a superior result of defect identification,they have to overcome some shortcomings,for instance slow convergence or stagnancy in local ***,optimization algorithms with a global search ability are used to enhance ANNs,*** increase the rate of convergence and to reach a global *** paper introduces a two-stage approach for failure identification in a steel *** the first step,the presence of defects and their positions are identified by modal *** the second step,a feedforward neural network,improved by a hybrid particle swarm optimization and gravitational search algorithm,namely FNN-PSOGSA,is used to quantify the severity of *** element(FE)models of the beam for two damage scenarios are used to certify the accuracy and reliability of the proposed *** comparison,a traditional ANN is also used to estimate the severity of the *** obtained results prove that the proposed approach can be used effectively for damage detection and quantification.

关键词： Feedforward neural network-particle swarm optimization and gravitational search algorithm(FNN-PSOGSA) Modal damage indices damage detection Hybrid algorithm PSOGSA

Exploring catalytic behaviors of CoS_(2)-ReS_(2) heterojunction by interfacial engineering

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Journal of Energy Chemistry 2023年第10期85卷 11-18,I0002页

作者： Jianmin Yu Yongteng Qian Sohyeon Seo Yang Liu Huong T.d.bui Ngoc Quang Tran Jinsun Lee Ashwani Kumar Hongdan Wang Yongguang Luo Xiaodong Shao Yunhee Cho Xinghui Liu Min Gyu Kim Hyoyoung Lee department of Chemistry Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Center for Integrated Nanostructure Physics(CINAP) Institute of Basic Science(IBS)Suwon 16419Republic of Korea College of Pharmacy Jinhua PolytechnicJinhua 321007ZhejiangChina Beamline Research division Pohang Accelerator Laboratory(PAL)Pohang University of Science and TechnologyPohang 37673Republic of Korea department of Biophysics Sungkyunkwan University2066 SeoburoJangan-guSuwon 16419Republic of Korea Creative Research Institute Sungkyunkwan University2066 SeoburoJangan-guSuwon 16419Republic of Korea

Herein, a stable and efficient CoS_(2)-ReS_(2) electrocatalyst is successfully constructed by using the different molar ratios of CoS_(2) on ReS_(2). The size and morphology of the catalysts are significantly changed after the CoS_(2) is grown on ReS_(2), providing regulation of the catalytic activity of ReS_(2). Particularly, the optimized CoS_(2)-ReS_(2) shows superior electrocatalytic properties with a low voltage of 1.48 V at 20 mA cm^(-2) for overall water splitting in 1.0 M KOH, which is smaller than the noble metal-based catalysts(1.77 V at 20 mA cm^(-2)). The XPS, XAS, and theoretical data confirm that the interfacial regulation of ReS_(2) by CoS_(2) can provide rich edge catalytic sites, which greatly optimizes the catalytic kinetics and drop the energy barrier for oxygen/hydrogen evolution reactions. Our results demonstrated that interfacial engineering is an efficient route for fabricating high-performance water splitting electrocatalysts.

关键词： CoS_(2) ReS_(2) Interfacial engineering Catalytic kinetics Water splitting

Anticancer effects of saponin and saponin–phospholipid complex of Panax notoginseng grown in Vietnam

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Asian Pacific Journal of Tropical Biomedicine 2016年第9期6卷 795-800页

作者： Thu dang Kim Hai Nguyen Thanh duong Nguyen Thuy Loi Vu duc Thu Vu Thi Hung Vu Manh Patcharee Boonsiri Tung bui Thanh department of Pharmacology and Clinical Pharmacy School of Medicine and PharmacyVietnam National University department of Pharmaceutics and Pharmaceutical Technology School of Medicine and PharmacyVietnam National University department of Pharmacology Hanoi University of Pharmacy department of Pharmacognosy and Traditional Pharmacy School of Medicine and PharmacyVietnam National University Faculty of Biology VNU University of Science Key Laboratory of Enzyme and Protein Technology VNU University of Science department of Pharmacology School of PharmacyLac Hong University department of Biochemistry Faculty of MedicineKhon Kaen University

Objective:To evaluate the antitumor activity both in vitro and in vivo of saponin–phospholipid complex of Panax ***:The in vitro cytotoxic effect of saponins extract and saponin–phospholipid complex against human lung cancer NCI-H460 and breast cancer cell lines BT474 was examined using MTS *** in vivo evaluation of antitumor potential,saponin and saponin–phospholipid complex were administered orally in rats induced mammary carcinogenesis by 7,12-dimethylbenz(a)anthracene,for 30 ***:Our data showed that saponin–phospholipid complex had stronger anticancer effect compared to saponin *** IC50 values of saponin–phospholipid complex and saponin extract for NCI-H460 cell lines were 28.47 mg/m L and 47.97 mg/mL,respectively and these values for BT474 cells were 53.18 mg/mL and 86.24 mg/mL,*** vivo experiments,administration of saponin,saponin–phospholipid complex and paclitaxel(positive control) effectively suppressed 7,12-dimethylbenz(a) anthracene-induced breast cancer evidenced by a decrease in tumor volume,the reduction of lipid peroxidation level and increase in the body weight,and elevated the enzymatic antioxidant activities of superoxide dismutase,catalase,glutathione peroxidase in rat breast ***:Our study suggests that saponin extract from Panax notoginseng and saponin–phospholipid complex have potential to prevent cancer,especially breast cancer.

关键词： Panax notoginseng Saponin Saponin–phospholipid complex Breast cancer Antitumor

depleted uranium oxide supported nickel catalyst for autothermal CO_(2)methanation in non-adiabatic reactor under induction heating

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Journal of Energy Chemistry 2023年第10期85卷 310-323,I0010页

作者： Lai Truong-Phuoc Jean-Mario Nhut Loïc Vidal Cuong duong-Viet Sécou Sall Corinne Petit Christophe Sutter Mehdi Arab Alex Jourdan Cuong Pham-Huu Institute of Chemistry and Processes for Energy Environment and Health(ICPEES)ECPMUMR 7515 CNRS-University of Strasbourg25 rue Becquerel67087 Strasbourg Cedex 02France BlackLeaf SAS 210 rue Geiler de Kaysersberg67400 IllkirchFrance Institute of Materials Science of Mulhouse IS2MUMR 7361Universitéde Haute-AlsaceCNRS15rue Jean Starcky-BP 248868057 MulhouseFrance ORANO Tricastin Direction de La Recherche&DéveloppementSite du TRICASTIN BP 1626701 Pierrelatte CedexFrance

Undoped nickel-based catalysts supported on depleted uranium oxide allow one to carry out CO_(2)methanation process under extremely low reaction temperature under atmospheric pressure and powered by a contactless induction *** adjusting the reaction conditions,the catalyst is able to perform CO_(2)methanation reaction under autothermal process operated inside a non-adiabatic reactor,without any external energy *** autothermal process is possible thanks to the high apparent density of the UO_x which allows one to confine the reaction heat in a small catalyst volume in order to confine the exothermicity of the reaction inside the catalyst and to operate the reaction at equilibrium heat in-heat *** autothermal operation mode allows one to significantly reduce the complexity of the process compared to that operated using adiabatic reactor,where complete insulation is required to prevent heat disequilibrium,in order to reduce as much as possible,the heat exchange with the external *** catalyst displays an extremely high stability as a function of time on stream as no apparent *** is expected that such new catalyst with unprecedented catalytic performance could open new era in the field of heterogeneous catalysis where traditional supports show their limitations to operate catalytic processes under severe reaction conditions.

关键词： CO_(2)methanation Auto-methanation Induction heating depleted uranium oxide Electrification process Operando dRIFTS

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甲烷在石墨化热解碳黑和活性炭上的吸附

燃料化学学报 2010年第3期38卷 359-364页

作者：郑青榕 dO duong-d 集美大学轮机工程学院福建厦门361021 昆士兰大学化学工程系

为研究影响碳基吸附剂吸附超临界温度气体的主要因素,选择石墨化热解碳黑BP280和Ajax活性炭,分析超临界温度高压甲烷在其上的吸附平衡。应用容积法,在压力0~20.5 MPa、温度253 K^313 K测定甲烷的吸附平衡数据,并由等量吸附线标绘和亨利... 详细信息

为研究影响碳基吸附剂吸附超临界温度气体的主要因素,选择石墨化热解碳黑BP280和Ajax活性炭,分析超临界温度高压甲烷在其上的吸附平衡。应用容积法,在压力0~20.5 MPa、温度253 K^313 K测定甲烷的吸附平衡数据,并由等量吸附线标绘和亨利定律常数确定等量吸附热。引入通用吸附等温方程,再由方程的Langmuir标绘确定最大吸附容量,进而通过方程的线性化计算吸附平衡态中甲烷分子的作用能。结果表明,甲烷在两种吸附剂上的最大吸附容量均随温度而变化,并都小于液态甲烷的密度;甲烷在碳黑和活性炭上的等量吸附热分别为11.9 kJ/mol^12.5 kJ/mol和17.5 kJ/mol^22.5 kJ/mol,体现了两种吸附剂不同的表面能量分布;甲烷分子间作用能随吸附量的变化特点反映了超临界温度甲烷以类似于压缩气体状态聚集的特点和吸附剂结构上的差异。碳基吸附剂的比表面积和微孔容积是影响其储存甲烷容量的重要因素。

关键词：甲烷活性炭碳黑吸附

Study the Hydration and the Microstructure of Cement Blended with Rice Husk Ash in Comparison with Silica Fume

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武汉理工大学学报 2010年第17期32卷 252-255,260页

作者： NGUYEN V T YE G VAN B K bui d d Faculty of Civil Engineering and Geosciences Delft University of TechnologyP.O. Box 50482600 GADelftThe Netherlands department of building Materials Hanoi University of Civil EngineeringHanoi 700803Vietnam

Rice husk ask (RHA) is not a ultra-fine material as silica fume (SF),but possesses a very high specific surface area because of its porous structure. With the similar chemical composition of RHA and SF,the activity of RHA,therefore,is different from that of SF. The objective of this work is to study the hydration and the microstructure of Portland cement blended with RHA in comparison with SF. The test results show that SF refined the pore structure of cement paste better than RHA. However,the effect of RHA on cement hydration is more pronouned than that of SF for the mixture with low water to binder ratio.

关键词： hydration isothermal calorimetry mercury intrusion porosimetry (MIP) microstructure rice husk ash silica fume

Protective effect of Tetracera scandens *** extract against CCl_4-induced acute liver injury in rats

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Asian Pacific Journal of Tropical Biomedicine 2015年第3期5卷 221-227页

作者： Tung bui Thanh Hai Nguyen Thanh Hue Pham Thi Minh Huong Le-Thi-Thu Huong duong Thi Ly Loi Vu duc School of Medicine and Pharmacy Vietnam National University Hanoi University of Pharmacy

Objective:To investigate the protective potential of ethanolic extracts of Tetracera scandens L.(***) against CCl_4 induced oxidative stress in liver ***:dried leaf powder of *** was extracted with ethanol and concentrated to yield a dry *** were administered with 100 mg/kg of ethanolic extracts orally once daily for one *** were subsequently administered with a single dose of CCl_4(I mL/kg body weight,intraperitoneal injection).Various assays,such as serum levels of alanine aminotransferase,aspartate aminotransferase,lipid peroxidation,protein oxidation(carbonyl protein group),tumor necrosis factor alpha,catalase,superoxide dismutase,and glutathione peroxidase,were used to assess damage caused by CCl_4 and the protective effects of the ethanol extract on liver ***:Hepatotoxicity induced by CCl_4 was evidenced by a significant increase in serum aspartate aminotransferase and alanine aminotransferase level,lipid peroxidation,protein carbonyl group,and tumor necrosis factor alpha,as well as decreased activity of the hepatic antioxidant enzymes(*** *** glutathione peroxidase).Treatment with ethanolic *** extracts prevented all of these typically observed changes in CCl_4-treated ***:Our findings indicate that *** has a significant protective effect against CCl_4 induced hepatotoxicity in *** may be due to its antioxidant properties.

关键词： Tetracera scandens L Antioxidant Carbon tetrachloride Liver toxicity Lipid peroxidation

Infectious keratitis in Vietnam:etiology,organisms,and management at Vietnam National Eye Hospital

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International Journal of Ophthalmology(English edition) 2022年第1期15卷 128-134页

作者： Pham Ngoc dong do Thi Thuy Hang Nguyen Thi Nga duong Mai Thi Lien Angela C.Chen Anthony J.Aldave Vietnam National Eye Hospital Hanoi 10000Vietnam Nam dinh Eye Hospital Nam Dinh 420000Vietnam Stein Eye Institute UCLA David Geffen School of MedicineLos AngelesCA 90095USA

AIM:To report the etiologies,risk factors,treatments,and outcomes of infectious keratitis(IK)at a major Vietnamese eye ***:This is a retrospective review of all cases of IK at Vietnam National Eye Hospital(VNEH)in Hanoi,*** histories,demographics,clinical features,microbiological results,and treatment outcomes were ***:IK was diagnosed in 1974 eyes of 1952 patients,with ocular trauma being the greatest risk factor for IK(34.2%),frequently resulting from an agriculturerelated injur y(53.3%).The mean duration between symptom onset and presentation to VNEH was 19.3±14.4 d,and 98.7%of patients had been treated with topical antibiotic and/or antifungal agents prior to evaluation at *** on smear results of 1706 samples,the most common organisms identified were bacteria(n=1107,64.9%)and fungi(n=1092,64.0%),with identification of both bacteria and fungi in 614(36.0%)***-five of 374 bacterial cultures(14.7%)and 426 of 838 fungal cultures(50.8%)were positive,with the most commonly cultured pathogens being Pseudomonas aeruginosa,Streptococcus pneumonia,Fusarium spp.,and Aspergillus *** perforation and descemetocele developed in 391(19.8%)and 93(4.7%)eyes,*** treatment was successful in resolving IK in 50.4%eyes,while 337(17.1%)eyes underwent penetrating or anterior lamellar *** was performed in 7.1%of eyes,most commonly in the setting of fungal ***:Ocular trauma is a major risk factor for IK in Vietnam,which is diagnosed in almost 400 patients each year at *** this,and as approximately one quarter of the eyes that develop IK require corneal transplantation or evisceration,greater emphasis should be placed on the development of prevention and treatment programs for IK in Vietnam.

关键词： infectious keratitis bacterial keratitis fungal keratitis microsporidial keratitis Acanthamoeba keratitis herpes simplex virus keratitis Vietnam

Surveillance of dengue and chikungunya infection in dong Thap,Vietnam:A 13-month study

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Asian Pacific Journal of Tropical Medicine 2016年第1期9卷 36-40页

作者： Pham Thi Kim Lien Laurence Briant Truong Ba Tang bui Minh Trang Laurent Gavotte Emmanuel Comillot Vu Trong duoc Tran Nhu duong Roger Frutos Phan Thi Nga National Institute of Hygiene and Epidemiology University of Montpellier department of Biology Dong Thap General Hospital Cirad TA-A17/GCampus International de Raillarguet

Objective:To establish a surveillance in dong Thap,at the border with Cambodia by assessing the presence of dHNV serotypes and CHIKV among patients hospitalized at dong Thap general ***:Cross-sectional descriptive analysis was conducted on a cohort of 131 patients hospitalized with acute fever and symptoms compatible with dengue or *** study was conducted from January 2012 to February *** full clinical picture was established as well as serological and molecular *** analysis was sequentially performed on blood samples collected on admission and an average of seven days after *** detection of IgM antibody to dENV was performed by IgM capture ELTSA and the detection of dENV and CHIKV RNA was done by reverse-transcription multiplex ***:101 patients out of 131(77%) were confirmed with *** four dengue serotypes were detected with a predominance of dENV2 and *** chikungunya infection was detected although reported in neighboring Cambodia.A differential efficiency of serological dengue detection was *** was 29%upon admission and 53%after seven days on the same patients.30 patients out of 131(23%) were negative with both dENV and ***:dengue is at risk of being underestimated and chikungunya is not systematically *** in detection and surveillance procedures are therefore discussed to increase efficiency of dengue detection and continue the monitoring the emergence of CHIKV in dong Thap province and in Vietnam.

关键词： dengue Chikungunya Arbovirus dong ThapVietnam