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Acta Mathematica Scientia 2020年第5期40卷 1171-1184页

作者： xuan truong le Thanh Nhan NGUYEN Ngoc Trong NGUYEN Division of Computational Mathematics and Engineering Institute for Computational ScienceTon Due Thang UniversityHo Chi Minh CityVietnam Faculty of Mathematics and Statistics Ton Due Thang UniversityHo Chi Minh CityVietnam Department of Mathematics Ho Chi Minh City University of EducationHo Chi Minh CityVietnam Department of Primary Education Ho Chi Minh City University of EducationHo Chi Minh CityVietnam

In this paper,we provide the boundedness property of the Riesz transforms associated to the Schrodinger operator■=-Δ+V in a new weighted Morrey space which is the generalized version of many previous Morrey type *** additional potential V considered in this paper is a non-negative function satisfying the suitable reverse Holder's *** results are new and general in many cases of *** an application of the boundedness property of these singular integral operators,we obtain some regularity results of solutions to Schrodinger equations in the new Morrey space.

关键词： weighted Morrey spaces Schodinger operator riesz transforms Regularity estima tes

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Therapeutic advances in atrial fibrillation based on animal models

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第2期25卷 135-152页

作者： Qian GONG xuan le Pengcheng YU lenan ZHUANG Institute of Genetics and Reproduction College of Animal SciencesZhejiang UniversityHangzhou310058China Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province Department of CardiologySir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou310016China

Atrial fibrillation(AF)is the most prevalent sustained cardiac arrhythmia among humans,with its incidence increasing significantly with *** the high frequency of AF in clinical practice,its etiology and management remain *** develop effective treatment strategies,it is imperative to comprehend the underlying mechanisms of AF;therefore,the establishment of animal models of AF is vital to explore its *** spontaneous AF is rare in most animal species,several large animal models,particularly those of pigs,dogs,and horses,have proven as invaluable in recent years in advancing our knowledge of AF pathogenesis and developing novel therapeutic *** review aims to provide a comprehensive discussion of various animal models of AF,with an emphasis on the unique features of each model and its utility in AF research and *** data summarized in this review provide valuable insights into the mechanisms of AF and can be used to evaluate the efficacy and safety of novel therapeutic interventions.

关键词： Atrial fibrillation Animal model Therapeutic

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越南学生汉语动物成语习得偏误分析

越南学生汉语动物成语习得偏误分析

作者： truong le HA NHU 重庆交通大学

学位级别：硕士

汉语成语一直被认为是中华文化的精华,是汉语学习过程中不可忽视的一部分。现在学习汉语的越南人越来越多。对越南学生来说,仅会简单说一点汉语是不够的,他们希望了解更多成语,更深层次地了解汉语成语背后的文化,提高汉语运用能力。但... 详细信息

汉语成语一直被认为是中华文化的精华,是汉语学习过程中不可忽视的一部分。现在学习汉语的越南人越来越多。对越南学生来说,仅会简单说一点汉语是不够的,他们希望了解更多成语,更深层次地了解汉语成语背后的文化,提高汉语运用能力。但由于动物成语的丰富性、结构的稳定性、意义的整体性和语法功能的多样性以及汉语文化背景、风俗习惯的多元性,再加上两国的地理环境及国家的民族思维方式存在差异,两国人民对同一种动物的联想在认知和理解上也存在很多差异。这导致越南学生很难掌握动物成语知识,在应用成语中常常出现偏误。因此,笔者作为越南学生,为了帮助越南学生更深入地学习和理解汉语动物成语,拟研究越南学生在汉语动物成语习得过程中遇到的偏误,归纳偏误类型,分析偏误原因并提出针对性的学习策略。本研究通过深入分析汉语与越南语动物成语的构词特点和文化内涵差异,揭示了语言结构和文化背景理解不足是导致越南学生在学习汉语动物成语时产生偏误的主要原因。通过设计并实施调查问卷,详细分析了越南学生在汉语动物成语学习中的具体偏误类型,包括语义偏误、语法偏误和语用偏误。调查结果显示,这些偏误不仅影响了学生运用语言的准确性,也限制了他们对汉语文化深层次的理解。针对发现的问题,本文提出了相应的对策,旨在帮助越南学生克服学习障碍,深化对汉语动物成语及其背后文化的理解。这些对策包括加强文化背景知识学习、采用成语分类和归纳法,以及通过多样化的学习活动和资源创造丰富的学习环境。研究强调通过多媒体资源、实践互动和中越文化交流活动等手段,激发学生的学习兴趣,提高其汉语成语的实际应用能力。本研究对于汉语作为第二语言的教学实践具有重要意义。通过实施本研究提出的学习对策,不仅可以有效减少越南学生在汉语成语学习中的偏误,还可以促进中越文化的交流与理解,为越南学生提供一条深入学习汉语、提升跨文化交际能力的有效途径。

关键词：越南学生动物成语偏误分析学习策略

Advancing Wound Filling Extraction on 3D Faces:An Auto-Segmentation and Wound Face Regeneration Approach

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 2197-2214页

作者： Duong Q.Nguyen Thinh D.le Phuong D.Nguyen Nga T.K.le H.Nguyen-xuan Department of Mathematics and Statistics Quy Nhon UniversityQuy Nhon City55100Viet Nam Applied Research Institute for Science and Technology Quy Nhon UniversityQuy Nhon City55100Viet Nam CIRTECH Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Facial wound segmentation plays a crucial role in preoperative planning and optimizing patient outcomes in various medical *** this paper,we propose an efficient approach for automating 3D facial wound segmentation using a two-stream graph convolutional *** method leverages the Cir3D-FaIR dataset and addresses the challenge of data imbalance through extensive experimentation with different loss *** achieve accurate segmentation,we conducted thorough experiments and selected a high-performing model from the *** selectedmodel demonstrates exceptional segmentation performance for complex 3D facial ***,based on the segmentation model,we propose an improved approach for extracting 3D facial wound fillers and compare it to the results of the previous *** method achieved a remarkable accuracy of 0.9999993% on the test suite,surpassing the performance of the previous *** this result,we use 3D printing technology to illustrate the shape of the wound *** outcomes of this study have significant implications for physicians involved in preoperative planning and intervention *** automating facial wound segmentation and improving the accuracy ofwound-filling extraction,our approach can assist in carefully assessing and optimizing interventions,leading to enhanced patient ***,it contributes to advancing facial reconstruction techniques by utilizing machine learning and 3D bioprinting for printing skin tissue *** source code is available at https://***/SIMOGroup/WoundFilling3D.

关键词： 3D printing technology face reconstruction 3D segmentation 3D printed model

Prevalence and risk factors associated with long COVID symptoms in children and adolescents in a southern province of Vietnam

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Asian Pacific Journal of Tropical Medicine 2024年第3期17卷 119-128,I0001,I0002页

作者： Huynh Ngoc Linh Nguyen The Tan le Thi Minh Thu Nguyen Tu Loan Nguyen Thi To Uyen le Thanh Thao Trang truong Thanh Nam Doan Hoang Phu Faculty of Medicine Ca Mau Medical CollegeCa Mau 98000Vietnam Ca Mau Obstetrics and Pediatrics Hospital Ca Mau 98000Vietnam Faculty of Basic Science and Public Health Dong Thap Medical CollegeDong Thap 81000Vietnam Graduate University of Sciences and Technology Vietnam Academy of Science and TechnologyHa Noi 10000Vietnam Community Public Health Research Program School of Public HealthWalailak UniversityNakhon Si Thammarat 80160Thailand Faculty Public Health Can Tho University of Medicine and PharmacyCan Tho City 94000Vietnam Doctoral Program in Health Sciences College of Graduate StudiesWalailak UniversityNakhon Si Thammarat 80160Thailand

Objective:To investigate the prevalence and risk factors associated with long COVID symptoms among children and adolescents who have recovered from ***:This study applied a cross-sectional approach within community settings in a southern province of Vietnam.A structured questionnaire featuring socio-demographic information and common long COVID symptoms was *** correlation coefficients assessed associations among pairs of long COVID ***,multivariable logistic regression models were performed to investigate the risk factors of long COVID in recovered COVID-19 children and ***:Among 422 participants,39.3%reported long COVID symptoms,with a prevalence of 45.2%(SD=0.5)in children and 22.2%(SD=0.4)in *** symptoms reported were cough 34.6%(SD=0.5),fatigue 20.6%(SD=0.4),shortness of breath 10.9%(SD=0.3),and lack of appetite 6.6%(SD=0.3).Concerning risk factors of long COVID,a higher risk was observed among demographic groups,including girls(OR 1.25,95%CI 1.15-1.37;Plescents(OR 1.24,95%CI 1.12-1.37;Ple dose(OR 1.35,95%CI 1.10-1.64;P=0.004)compared to those who have received two ***,patients with a COVID-19 treatment duration exceeding two weeks also had a higher risk of long COVID(OR 1.32,95%CI 1.09-1.60;P=0.003)than those who recovered less than seven ***:The insights from this study provide crucial guidance for predicting the factors associated with the occurrence of long COVID in pediatric patients,contributing to strategic interventions aimed at mitigating the long COVID risks among children and adolescents in Vietnam.

关键词： Long COVID Prevalence Risk factors Children Adolescent Vietnam

Tungsten-based nanocatalysts with different structures for visible light responsive photocatalytic degradation of bisphenol A

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Journal of Environmental Sciences 2024年第5期139卷 569-588页

作者： Hai Bang truong Thi Thu Loan Doan Nguyen Tien Hoang Nguyen Van Tam Minh Kim Nguyen le Gia Trung Jin Seog Gwag Nguyen Tien Tran Optical Materials Research Group Science and Technology Advanced InstituteVan Lang UniversityHo Chi Minh CityViet Nam Faculty of Applied Technology School of TechnologyVan Lang UniversityHo Chi Minh CityViet Nam The University of Da Nang University of Science and Technology54 Nguyen Luong BangDa NangViet Nam The University of Da Nang University of Science and Education459 Ton Duc Thang St.Lien ChieuDa Nang 550000Viet Nam Institute of Veterinary Science and Technology 31ha zoneTrau QuyGia LamHa Noi 12400Viet Nam Department of Physics Yeungnam UniversityGyeongsanGyeongbuk 38541Republic of Korea Center for Advanced Chemistry Institute of Research and DevelopmentDuy Tan University03 Quang TrungDa Nang 550000Viet Nam Faculty of Natural Sciences Duy Tan University03 Quang TrungDa Nang 550000Viet Nam

Environmental pollution,such as water contamination,is a critical issue that must be absolutely ***,three different morphologies of tungsten-based photocatalysts(WO_(3)nanorods,WO_(3)/WS_(2)nanobricks,WO_(3)/WS_(2)nanorods)are made using a simple hydrothermal method by changing the solvents(H_(2)O,DMF,aqueous HCl solution).The as-prepared nanocatalysts have excellent thermal stability,large porosity,and high *** results show all materials have good photocatalytic activity in aqueous media,with WO_(3)/WS_(2)nanorods(NRs)having the best activity in the photodegradation of bisphenol A(BPA)under visible-light *** may originate from increased migration of charge carriers and effective prevention of electron–hole recombination in WO_(3)/WS_(2)NRs,whereby this photocatalyst is able to generate more reactive·OH and·O_(2)^(–)species,leading to greater photocatalytic *** 99.6% of BPA is photodegraded within 60 min when using 1.5 g/L WO_(3)/WS_(2)NRs and 5.0 mg/L BPA at pH ***,the optimal conditions(pH,catalyst dosage,initial BPA concentration)for WO_(3)/WS_(2)NRs are also elaborately *** rod-like heterostructures are expressed as potential catalysts with excellent photostability,efficient reusability,and highly active effectivity in different types of *** particular,the removal efficiency of BPA by WO_(3)/WS_(2)NRs reduces by only 1.5% after five recycling runs and even reaches 89.1%in contaminated lake *** study provides promising insights for the nearly complete removal of BPA from wastewater or different water resources,which is advantageous to various applications in environmental remediation.

关键词： Photodegradation Bisphenol A Tungsten-based nanocatalyst Structure Nanorod

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Understanding the Activity Performance of Comets 38P/Stephan-Oterma,64P/Swift-Gehrels and C/2017 M4(ATLAS) through Broadband Photometric Observations

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Research in Astronomy and Astrophysics 2024年第8期24卷 149-158页

作者： xuan Zhang Jin-Zhong Liu le-Tian Wang Xinjiang Astronomical Observatory Chinese Academy of Sciences

In this work,we report observations of three comets:38P/Stephan-Oterma,64P/Swift-Gehrels,and C/2017 M4（ATLAS）,conducted with the Nanshan one-meter wide-field telescope in 2018 August and November,and *** extracted morphological features through image enhancement techniques and calculated the dust activity parameter,Afρ,along with dust mass loss rates and coma color indices using broadband photometric *** morphological analysis uncovered a spectrum of dust characteristics among the observed comets,ranging from a significant twisted structure in comet 38P/Stephan-Oterma’s coma to the regular coma envelope surrounding comet 64P/*** Afρvalues varied between 148.8±0.3 cm for 64P/Swift-Gehrels and1118.5±6.2 cm for C/2017 M4 （ATLAS）(measured within a reference aperture radius ofρ=6″),indicating a range from moderate to high activity *** mass loss rates were estimated from 328.1 kg s-1for comet 64P/Swift-Gehrels to 1395.5 kg s-1for comet C/2017 M4 （ATLAS）.The color indices of comets 38P/Stephan-Oterma and C/2017 M4 （ATLAS） closely resemble the average colors of active short-period comets and active longperiod comets,*** contrast,64P/Swift-Gehrels exhibits a significantly bluer hue than typical Jupiter family comets.

关键词： comets: general comets: individual (38P/Stephan-Oterma, 64P/Swift-Gehrels, C/2017 M4 (ATLAS)) techniques: photometric

Emerging progress: photochemical transformation of nitroso compounds

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Science China Chemistry 2024年

作者： Ze-le Chen Qiang-Qiang Li Armido Studer Jun xuan Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials School of Chemistry & Chemical Engineering Anhui University Organisch-Chemisches Institut Universitat Münster

Nitroso compounds have emerged as highly valuable reaction partners or reagents in organic synthesis due to their rich *** versatile profile of these compounds allows them to function as electrophiles, nucleophiles, diradicals, and radical acceptors in diverse transformations. In recent years, notable progress has been made in harnessing photochemical reactions with nitroso compounds to prepare N,O-containing structures using mild and eco-friendly conditions. Various nitroso compounds like nitrosoarenes, acyloxy nitroso compounds, N-nitrosoamines and nitrites have received significant attention for their ability to introduce NO moieties into complex molecules that are otherwise difficult to access. In this review, we provide an overview of the recent advancements in the visible light-induced conversion of nitroso compounds, with particular emphasis on their role as bifunctional reagents and acceptors of radicals, carbenes and nitrenes.

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An Analysis of the Fragmentation of Observing Time At the Muztagh-Ata Site

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Research in Astronomy and Astrophysics 2024年第3期24卷 29-33页

作者： Wen-Bo Gu Jing Xu Guo-Jie Feng xuan Zhang le-Tian Wang Xin-Liang Wang Ali Esamdin Li-Xian Shen Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 83001lChina School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

Cloud cover plays a pivotal role in assessing observational conditions for astronomical *** for the fraction of observing time,its fragmentation also wields a significant influence on the quality of nighttime sky *** this article,we introduce the functionΓ∈[0,1],designed to comprehensively capture both the fraction of available observing time and its *** in situ measurement data gathered at the Muztagh-Ata site between 2017 and 2021,we showcase the effectiveness of our *** statistical result illustrates that the Muztagh-Ata site affords approximately 122 nights that were absolutely clear and 205 very good nights annually,corresponding toΓ≥0.9 andΓ≥0.36 respectively.

关键词： site testing-atmospheric effects-methods statistical

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Energy band modulation of N-doped rutile/anatase TiO2 photoanode promoting charge separation toward prominent photoelectrochemical performance

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Rare Metals 2024年第8期43卷 3784-3797页

作者： Juan Gao Shi-xuan Wang Jia-le Deng Ping-Ping Wei Fu-Zhang Chen Ling-Cheng Zheng Yue-Qin Wang Yang Li Yin Liu Gang He School of Mechanics and Photoelectric Physics Anhui University of Science and Technology School of Materials Science and Engineering Anhui University Tianneng Battery (Wuhu) Co. Ltd. School of Materials Science and Engineering Anhui University of Science and Technology

To solve the problem of high photogenerated carrier recombination rate and low photoelectric conversion efficiency of TiO2-based materials,a simple N-doped anatase/rutile TiO2heterophase nanorod film was designed by a low-temperature hydrothermal method in this *** enhanced separation and transport of photogenerated charges were facilitated by the smaller contact barrier and appropriate band matching between anatase TiO2nanoparticles and rutile *** introduction of N doping in anatase TiO2resulted in an upward shift of the valence band and a narrowing of the band gap,consequently enhancing the efficiency of visible light *** combination of the heterophase junction and N-doping exhibited a synergistic effect,effectively suppressing the recombination of photogenerated charges and enhancing the photoelectric conversion efficiency of the *** AM 1.5G irradiation,the photocurrent density（J） of the A-TO（N）@R-TONR photoanode reached2.19 mA·cm-2(VRHE,1.23 eV).Additionally,the incident photon-electron conversion efficiency（IPCE） and the charge injection efficiency（η） reached 81.4% and 51.6% at320 ***,the J,IPCE,and η values of the A-TO（N）@R-TONR photoanode were 2.96,2.1 and 3.2times those of pure R-TONR photoanode,*** work presents a rational strategy for designing efficient TiO2-based photoanodes.

关键词： TiO 2 Heterophase junction Photoanode