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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1401-1423页

作者： thu huong nguyen THI Van Ke TRAN Quoc Hoa PHAM School of Mechanical and Automotive Engineering Hanoi University of IndustryHanoi 100000Vietnam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi 100000Vietnam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh City 700000Vietnam

This work uses isogeometric analysis(IGA),which is based on nonlocal hypothesis and higher-order shear beam hypothesis,to investigate the static bending and free oscillation of a magneto-electro-elastic functionally graded(MEE-FG)nanobeam subject to elastic boundary constraints(BCs).The magneto-electric boundary condition and the Maxwell equation are used to calculate the variation of electric and magnetic potentials along the thickness direction of the *** study is innovative since it does not use the conventional boundary ***,an elastic system of straight and torsion springs with controllable stiffness is used to support nanobeams’beginning and end positions,creating customizable *** governing equations of motion of nanobeams are established by applying Hamilton’s principle and IGA is used to determine deflections and natural frequency *** studies were performed to evaluate the convergence and accuracy of the proposed *** from this,the impact of the input parameters on the static bending and free oscillation of the MEE-FG nanobeam is examined in *** findings could be valuable for analyzing and designing innovative structures constructed of functionally graded MEE materials.

关键词： elastic boundary conditions isogeometric analysis nanobeam via nonlocal theory grading of magneto-electro-elastic functions

State Policy on the Environment in Vietnamese Handicraft Villages

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Chinese Business Review 2016年第6期15卷 290-295页

作者： nguyen Thi thu huong Hanoi Open University Hanoi Vietnam

Handicraft villages play an important role in promoting social and economic development in rural areas as well as Vietnam＇s economy. Nowadays, Vietnam＇s handicrafts have a foothold in the world market, and are exported over 163 countries and territories （Tuan, 2010）. However, the production activities of the handicraft village have a lot of shortcomings, especially the problem of environmental pollution （Chi, 2010）. Therefore, government policy plays a very important role to minimize environmental pollution villages, contributing to improving environmental quality and public health. This paper focuses on： 1）. Current status of state policy environment in handicraft villages shows the achievements and limitations of the policy, from which reviews state policy in environments in handicraft villages （through fieldwork in the handicraft villages）; and 2）. Solution to improve state policy on environmental protection in handicraft villages in Vietnam.

关键词： craft village state policy environmental policy

Nonlocal isogeometric analysis for bidirectional functionally graded porous curved microbeams with arbitrary boundary conditions

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Acta Mechanica Sinica 2024年第8期40卷 194-218页

作者： thu-huong nguyen Thi Van Ke Tran Van-Minh Phung Van Hai Trinh Quoc Hoa Pham Faculty of Mechanical Engineering Hanoi University of IndustryHanoi100000Vietnam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi100000Vietnam Institute of Vehicle and Energy Engineering Le Quy Don Technical UniversityHanoi100000Vietnam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh City700000Vietnam

This research aims to analyze the static bending and free vibration behaviors of bidirectional functionally graded porous(BFGP)curved microbeams with elastic boundary conditions resting on a Pasternak’s elastic foundation in a hygro-thermal *** analysis based on non-uniform rational B-splines,first-order shear deformation theory,nonlocal elasticity theory combined with the modified strain gradient theories,modified Timoshenko beam theory are formulated to depict bending and shear deformations of BFGP curved ***,because using the modified Timoshenko beam theory,this study removes the requirement for a shear correction factor and describes shear stress by zero at the upper and lower cross-sectional sites of the BFGP curved *** from traditional boundary conditions,where the beginning and end positions of a curved beam are connected by an elastic system of straight and torsion *** allows for greater flexibility in controlling the stiffness of the springs to obtain arbitrary *** assess the accuracy and convergence of the proposed approach,validation numerical examples were conducted in the various examples.

关键词： Bidirectional functionally graded porous material Elastic boundary condition Isogeometric analysis Curved microbeams Nonlocal elasticity theory Modified strain gradient theory

A study implementing real-time PCR to identify Strongyloides species of third-stage larvae in human stool samples from Southern Vietnam

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Infectious Medicine

Infectious Medicine 2023年第3期2卷 229-236页

作者： Le Duc Vinh nguyen Kim Thach Huynh Hong Quang Do Nhu Binh Tran Thi Duc Hanh nguyen Minh Toàn nguyen Trung Tuyen nguyen thu huong Department of Medical Parasitology Pham Ngoc Thach University of MedicineHo Chi Minh City 700000Vietnam Department of Fundamental Chemistry-Biochemistry Pham Ngoc Thach University of MedicineHo Chi Minh City 700000Vietnam Clinical Epidemiology Research Unit Institute of MalariologyParasitologyand Entomology Quy NhonBinh Dinh 55000Vietnam Department of Infectious Disease Military Hospital 103Hanoi 100000Vietnam Department of Epidemiology Hanoi University of Public HealthHanoi 100000Vietnam Department of Microbiology-Parasitology Hanoi University of Public HealthHanoi 100000Vietnam Department of Medicine University of Medicine and PharmacyVietnam National UniversityHanoi100000 Vietnam

Background:Strongyloidiasis,a neglected disease caused by intestinal nematodes of the genus,is endemic to tropical and subtropical areas such as *** methods only identify the genus,while DNA-molecular techniques are susceptible in Strongyloides *** study aims to determine the prevalence of dominant Strongyloides species among the population in Duc Hoa district,Long An,***:A cross-sectional study used 1190 stool specimens collected from July 2017 to November *** samples were transported within 2 h,stored at 2-8℃,and processed within 48 h for microscopy smear and culture at the Laboratory of Medical Parasitology,Pham Ngoc Thach University of Medicine(PNT).Then all positive samples with the above 2 methods were verified by real-time PCR ***-time PCR amplification was conducted at the Laboratory of Molecular Biology,***:Direct microscopy and modified Harada-Mori culture detected Strongyloides *** in 79/1190 sam-ples(6.6%).About 94.2%of the DNA samples were Strongyloides stercoralis,2.9%were co-infections with Strongy-loides ratti and ***,and 2.9%were patients with *** identity of 12/14 sequences was confirmed as *** with a high level of similarity(91.3%-100%)and over 98%for ***:DNA-molecular techniques and sequence analysis are highly suitable for identifying Strongyloides species isolated from stool *** is remarkable evidence of the presence of zoonosis *** disease in human,not just the known *** is likely to result in a certain proportion of people being infected by this animal-borne infectious pathogen.

关键词： Strongyloidiasis Strongyloides stercoralis Strongyloides ratti DNA-molecular techniques

Strong limit on Δα/α from the analysis of feII absorp-tion line multiplets

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Natural Science 2011年第7期3卷 508-512页

作者： Le Duc Thong nguyen Thi thu huong 不详

The article has been retracted due to the investigation of complaints received against it. The substantial portions of the text came from Le Duc Thong’s former article, 'New method of searching for cos-mological time variation of the fine-structure constant', which has also been retraced by Prog. Theor. Phys. because of plagiarism. The scientific community takes a very strong view on this matter and we treat all unethical behavior such as plagiarism seriously. This paper published in Vol.3 No.7 508-512, 2011, has been removed from this site.

关键词： Determination of Fundamental Constants Observation Cosmology

Studying Cosmological Time Variability of the Fine-Structure Constant from the Analysis of Quasar Spectra

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Journal of Modern Physics 2011年第6期2卷 533-537页

作者： Le Duc Thong nguyen Thi thu huong 不详

The article has been retracted due to the investigation of complaints received against it. The substantial portions of the text came from Le Duc Thong’s former article, 'New method of searching for cos-mological time variation of the fine-structure constant', which has also been retraced by Prog. Theor. Phys. because of plagiarism. The scientific community takes a very strong view on this matter and we treat all unethical behavior such as plagiarism seriously. This paper published in Vol.2 No.6 533-537, 2011, has been removed from this site.

关键词： Determination of Fundamental Constants Observation Cosmology

New test for cosmological time variation of thefine-structure constant from the analysis of quasarspectra

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Natural Science 2011年第7期3卷 503-507页

作者： Le Duc Thong nguyen Thi thu huong 不详

关键词： Determination of FundamentalConstants Observation Cosmology

Transient response of doubly-curved bio-inspired composite shells resting on viscoelastic foundation subject to blast load using improved first-order shear theory and isogeometric approach

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Defence Technology（防务技术） 2024年第8期38卷 171-193页

作者： thuy Tran Thi thu Tu nguyen Anh Hue nguyen Thi Hong nguyen Thi School of Mechanical and Automotive Engineering Hanoi University of IndustryHanoiViet Nam Faculty of Technical Fundamental University of Transport TechnologyHanoiViet Nam Faculty of Mechanical Engineering Thuyloi University175 Tay SonDong DaHanoiViet Nam

Investigating natural-inspired applications is a perennially appealing subject for scientists. The current increase in the speed of natural-origin structure growth may be linked to their superior mechanical properties and environmental resilience. Biological composite structures with helicoidal schemes and designs have remarkable capacities to absorb impact energy and withstand damage. However, there is a dearth of extensive study on the influence of fiber redirection and reorientation inside the matrix of a helicoid structure on its mechanical performance and reactivity. The present study aimed to explore the static and transient responses of a bio-inspired helicoid laminated composite(B-iHLC) shell under the influence of an explosive load using an isomorphic method. The structural integrity of the shell is maintained by a viscoelastic basis known as the Pasternak foundation, which encompasses two coefficients of stiffness and one coefficient of damping. The equilibrium equations governing shell dynamics are obtained by using Hamilton's principle and including the modified first-order shear theory,therefore obviating the need to employ a shear correction factor. The paper's model and approach are validated by doing numerical comparisons with respected publications. The findings of this study may be used in the construction of military and civilian infrastructure in situations when the structure is subjected to severe stresses that might potentially result in catastrophic collapse. The findings of this paper serve as the foundation for several other issues, including geometric optimization and the dynamic response of similar mechanical structures.

关键词： Blast load Modified first-order shear theory Biological composite structures

On Unparticle Searches through Photon-Photon Scattering

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Journal of Modern Physics 2015年第13期6卷 1798-1802页

作者： Trieu Quynh Trang Ha Huy Bang nguyen thu huong Sa Thi Lan Anh Faculty of Physics Hanoi University of Sciences Vietnam National University Hanoi Vietnam

In this work, we study the effects of the spin-0 unparticle on γγ → γγ process. From the numerical results, we show that the cross section with unparticle effect should be about 1027 - 1030 times larger than the one that is confirmed by QED calculation. This could have important implications for unparticle searches and for the measurement of the photon-photon cross section.

关键词： Unparticle Physics Photon-Photon Scattering

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中越文化交流现状研究及发展建议

中越文化交流现状研究及发展建议

作者：阮秋香（nguyen thu huong）辽宁师范大学

学位级别：硕士

中华文化博大精深、源远流长,对世界产生了广泛而深远的影响。越南和中国“山连着山、水连着水”,越南文化深受中华文化的影响,节日文化就是生动的体现。但越南文化也具有自己的特色,新形势下,随着中越两国的合作日益多元,文化交流也愈... 详细信息

中华文化博大精深、源远流长,对世界产生了广泛而深远的影响。越南和中国“山连着山、水连着水”,越南文化深受中华文化的影响,节日文化就是生动的体现。但越南文化也具有自己的特色,新形势下,随着中越两国的合作日益多元,文化交流也愈加频繁。因此本文调查研究了中越文化交流现状,以期为两国文化交流的深入发展提供参考。目前,中国文化对越南的影响比较大,但在越南,对中国文化交流现状这一方面的研究成果并不多。本论文从文化外交、教育合作和媒体交流三个视角研究中越文化交流现状。并指出优势、劣势以及面临的机遇和挑战,从而提出有效的发展建议。本文包含六个部分:绪论部分:包括研究背景、研究目的、研究意义、研究方法、研究理论基础、研究思路及框架。第一章:文献综述。介绍了中越文化交流在越南研究的情况,中越文化交流在中国研究情况、现有研究成功与不足之处、本研究能解决的问题和亮点。第二章:中越文化交流现状研究。从文化外交、教育合作、媒体交流三个重要领域对中越文化交流现状进行研究。第三章:开展中越文化交流活动面临的机遇与挑战。其优势在于中国语言和文化的吸引力日益扩大,21世纪前10年世界对中国形象有全新的看法,在越南的华侨社区。其劣势在于该活动未能创造具有足够吸引力的当代文化浪潮、越南孔子学院发展还不够强大。中越文化交流将面临许多机遇,如越南来华留学生人数增多,汉语在越南的广泛传播促进汉语教学,为越南人创造工作机会。但同时也要面对不少挑战,即人数和社会发展指数跟不上经济潜力和来自文化软实力强国的竞争压力。第四章:中越文化交流的发展建议。即丰富文化合作和交流的内容、加强孔子学院活动的开展、发挥华侨在越南的作用、运用媒体交流的便利、增加教育教学的交流。结语部分:包括研究总结、创新点以及不足之处。

关键词：中国越南文化交流现状建议