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Journal of Materiomics 2022年第1期8卷 1-8页

作者： Pham Van Viet Thanh-Dat nguyen Dai-Phat Bui Cao Minh Thi Faculty of Materials Science and Technology University of ScienceVNU-HCM227 Nguyen Van Cu StreetDistrict 5Ho Chi Minh City700000Viet Nam Vietnam National University-Ho Chi Minh City Thu Duc DistrictHo Chi Minh City700000Viet Nam Ho Chi Minh City University of Technology(HUTECH) 475A Dien Bien Phu StreetBinh Thanh DistrictHo Chi Minh City700000Viet Nam

NOx emissions cause many negative impacts on the living *** photocatalysis of semiconductors is superior for nitric oxide(NO)degradation due to their low redox *** this report,we combine SnO_(2-x)/g-C_(3)N_(4)heterojunction photocatalyst toward the high selectivity into green products under visible light *** show that SnO_(2-x)/g-C_(3)N_(4)heterojunction degraded 40.8%of NO,which is 1.6 times higher than that of g-C_(3)N_(4).In addition,the selectivity coefficient of SnO_(2-x)/g-C_(3)N_(4)is higher 3 times than both pure SnO_(2-x)and g-C_(3)N_(4).Furthermore,SnO_(2-x)/g-C_(3)N_(4)expresses a superior stability for NO photocatalytic-degradation after five *** scavenger trapping test results,and electron spin resonance(ESR)analysis also provide more understanding of the charge transfer mechanism of ***_(2-x)/g-C_(3)N_(4)heterojunction shows a high removal efficiency of NO gas,making it an up-and-coming environmental treatment candidate.

关键词： G-C_(3)N_(4) NO removal Oxygen vacancies Photocatalysis S-scheme

Does Customer Experience Management Impact Customer Loyalty Shopping at Supermarket？ The Case in the Mekong Delta, Vietnam

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Economics World 2018年第1期6卷 13-21页

作者： Luu Tien thuan nguyen Huynh Bao Ngoc nguyen thu Nha Trang Can Tho University Can Tho Vietnam

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基于极化SAR目标信息提取与SVM分类

基于极化SAR目标信息提取与SVM分类

作者： nguyen quang KHANH 哈尔滨工业大学

学位级别：硕士

极化合成孔径雷达(Pol SAR)可以利用不同极化通道的SAR复图像区分物体的细致结构和目标指向等特性,对SAR图像中的典型目标进行特征提取与分类,在遥感领域具有广泛的应用前景。论文主要研究Pol SAR图像的人造目标信息的提取,重点围绕极... 详细信息

极化合成孔径雷达(Pol SAR)可以利用不同极化通道的SAR复图像区分物体的细致结构和目标指向等特性,对SAR图像中的典型目标进行特征提取与分类,在遥感领域具有广泛的应用前景。论文主要研究Pol SAR图像的人造目标信息的提取,重点围绕极化目标分解和Pol SAR图像分类地研究。首先,本文对目标的极化特征和目标分解方法进行研究,包括基于散射矩阵的相干目标分解(Pauli和SDH分解)、基于特征值的非相干目标分解以及基于散射模型的非相干目标分解(Freeman和Yamaguchi分解)等方法。基于不同极化分解方法,研究各极化分量对分类目标的敏感程度,为进一步研究Pol SAR图像的目标特征提取和目标分类奠定基础。本文利用EMISAR的Pol SAR数据进行试验,研究目标分解方法的效性。分解得到的各散射成分作为主要特征用于的人造信息目标提取和Pol SAR图像目标分类。其次,在Pol SAR图像分类中,利用支持向量机(SVM)适用于小样本数据训练的良好的特性和极化分解的特征分量散射特性,本文提出了基于SVM“一对一”的Pol SAR图像分类算法,完成对Pol SAR图像进行建筑、森林、河流和农田的分类。实验表明,该算法能够较好地对Pol SAR图像中的目标类型进行区分,并能够快速检测出人造目标建筑物,对于Pol SAR图像的分类和人造目标检测具有一定的适用性。

关键词：极化合成孔径雷达特征提取极化目标分解图像分类

Polluter Pays Principle： Who Pays for Industrial Waste in Ho Chi Minh City, Vietnam

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Journal of Environmental Science and Engineering(A) 2012年第1期1卷 100-106页

作者： nguyen Thi thu Trang Kosuke Toshiki Shoichi Kunikane Department of Environmental Health Sciences University of ShizuokaShizuoka 422-8526Japan

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

Knowledge of child nutrition when breastfeeding—A study of mothers living outside Hanoi

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Health 2013年第11期5卷 1853-1860页

作者： Thi thu Huong nguyen Ulrika Lindmark Ann Bengtson Midwifery Department Faculty of NursingHanoi Medical UniversityHanoiVietnam School of Health Sciences Jonkoping UniversityJonkopingSweden Institute of Health and Care Sciences Sahlgrenska Academy at the University of GothenburgGothenburgSweden

Objective: To evaluate the knowledge of?nutrition?among mothers of children less than two years of age and changes in theoretical knowledge after a nutrition course. Method: A pilot study with a pre-post-test design. Thirty mothers of children who were less than two years of age from outside Hanoi participated in the study. The mothers’ knowledge of breastfeeding, supplementary food and diet when the child was suffering from diarrhea was collected using 19 self-reported questions. A one-day nutrition course at which the mothers answered the same questions before and after the course was run. Results: All the invited mothers were included in the study. There was a lack of knowledge about breastfeeding and nutrition at baseline, but it improved after the nutrition course. The greatest improvement in knowledge related to breastfeeding less than 30 minutes after delivery, not giving milk or fruit juice instead of breast milk, increasing the frequency of breastfeeding in the event of a smaller amount of milk and knowledge about giving supplementary food after six months. Moreover, the results revealed that the mothers reported better knowledge of the consumption and frequency of more healthy food supplements. Conclusion: There was a lack of knowledge about nutrition among the mothers with children less than two years of age. The course demonstrated effectiveness in every aspect of nutritional knowledge, tested in the posttest. The findings in this study could provide important information for authorities in the health sector to improve the nutritional state of children in the community.

关键词： Breastfeeding Malnutrition Nutrition Education Supplementary Food

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

Ethanol extracts of Scutellaria baicalensis protect against lipopolysaccharide-induced acute liver injury in mice

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Asian Pacific Journal of Tropical Biomedicine 2015年第9期5卷 733-738页

作者： Hai nguyen Thanh Hue Pham Thi Minh Tuan Anh Le Huong Duong Thi Ly Tung nguyen Huu Loi Vu Duc thu Dang Kim Tung Bui Thanh School of Medicine and Pharmacy Vietnam National University Hanoi University of Pharmacy

Objective: To investigated the protective potential of ethanol extracts of Scutellaria baicalensis(S. baicalensis) against lipopolysaccharide(LPS)-induced liver injury. Methods: Dried roots of S. baicalensis were extracted with ethanol and concentrated to yield a dry residue. Mice were administered 200 mg/kg of the ethanol extracts orally once daily for one week. Animals were subsequently administered a single dose of LPS(5 mg/kg of body weight, intraperitoneal injection). Both protein and m RNA levels of cytokines, such as tumor necrosis factor alpha, interleukin-1β, and interleukin-6 in liver tissues were evaluated by ELISA assay and quantitative PCR. C yclooxygenase-2, inducible nitric oxide synthase, and nuclear factor-κB protein levels in liver tissues were analyzed by western blotting. Results: Liver injury induced by LPS signifi cantly increased necrosis factor alpha, interleukin-1β, interleukin-6, cyclooxygenase-2, inducible nitric oxide synthase, and nuclear factor-κB in liver tissues. Treatment with ethanol extracts of S. baicalensis prevented all of these observed changes associated with LPS-induced injury in liver ***: Our study showed that S. baicalensis is potentially protective against LPS-induced liver injury in mice.

关键词： Scutellaria baicalensis Lipopolysaccharide Liver injury Cytokine Nuclear factor-κB

基于地球化学和环境磁学特征的越南红河沉积物重金属污染研究

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基于地球化学和环境磁学特征的越南红河沉积物重金属污染研究

作者： nguyen THI thu HIEN 华东师范大学

学位级别：硕士

河流重金属污染由于其具有的潜在危害性而受到广泛的关注,重金属含量则常被用作判别河流水环境质量的重要指标。红河是越南第二大河流,但目前对红河沉积物的重金属污染研究仍很薄弱。论文以越南境内红河上游(老街)至河口、水下三角洲采... 详细信息

河流重金属污染由于其具有的潜在危害性而受到广泛的关注,重金属含量则常被用作判别河流水环境质量的重要指标。红河是越南第二大河流,但目前对红河沉积物的重金属污染研究仍很薄弱。论文以越南境内红河上游(老街)至河口、水下三角洲采集的50个表层沉积物为对象,对其进行了粒度、重金属、常量元素地球化学组成和磁性特征的表征,旨在评价重金属污染及其空间变化,分析其影响因素,并探讨磁性特征指示沉积物重金属污染的可行性及其内在关联机制。主要结论如下：1、自红河上游至三角洲平原地区,沉积物粒度呈现先变粗后变细的特征。水下三角洲中,水深5m以浅区域中沉积物以砂质组分占主导,而水深5 m以深区域则主要为粉砂和黏土主导。沉积物粒度特征变化反映了不同沉积环境的水动力强弱。2、根据聚类分析与主成分分析等结果,红河流域沉积物中重金属(Cr、 V、Cu、Cd、Pb、Ni和Zn)可分为两组。其中Cr、V与黏土、Al、Fe、Mn和有机碳(TOC)含量高度相关,表明这些重金属主要富集在富含Fe/Mn氧化物黏土矿物以及有机碳的细颗粒沉积物主要来自自然地风化过程。Cr和V从上游到河口地区逐渐增加,特别是自F39采样点(F39为三角洲河流分汉之处)向河口地区增加趋势尤为明显,反映了粒度对其含量的控制作用,这些因素主要来自自然的风化过程。而Cu、Cd、Pb、Ni和Zn与粒度的关系较弱,其含量自上游向下游无明显变化趋势,这些元素含量在红河上游局部地区呈现高值,说明存在人为污染的影响。3、根据富集因子(EF)计算结果,发现红河沉积物自上游至下游均存在一定程度的重金属污染,其中上游地区污染程度较高。红河沉积物中Cd、Cu和Pb是最主要的重金属污染元素,达到了中度和高度污染水平。4、红河沉积物磁化率x和饱和等温剩磁SIRM有相似的变化趋势,表明红河沉积物的磁性特征为亚铁磁性矿物所主导。磁铁矿和赤铁矿是主要的磁性矿物。粒度是影响沉积物磁性特征的重要因素。χfd%、χARM、χARM/χ、χARM/SIRM与<4μm(黏土)粒级含量之间呈显著正相关;S-ratio与黏土含量呈负相关,表明细晶粒磁铁矿(SP/SD)以及赤铁矿在黏土中富集。自红河上游至河口以及水下三角洲地区,随着黏土含量的增加,磁性颗粒变细,体现了沉积物磁性特征对粒度以及水动力变化的响应。磁性参数χfd%、χARM、χARM/χ、χARM/SIRM可以作为黏土含量的代用指标。5、红河沉积物中未发现磁化率x与重金属含量之间存在明显相关性,这可能指示了磁性矿物与重金属具有不同的来源。磁性参数xfd%与重金属Cr、V、Ni、Zn具有显著的相关性,尤其与Cr和V具有较强的相关性,但与Cu与Cd不具有明显相关性。Cr和V主要来自于自然风化过程,其含量受到粒度特征的控制。由于细粒级组分中较高含量的黏土矿物和铁氧化物对重金属元素具有较强的吸附能力,从而导致了xfd%与Cr、V含量的强相关性。相反,Cu与Cd主要来自于人类活动的污染物质排放,其含量受到粒度的控制作用相对较小,从而导致其与xfd%不具有相关性。Ni、Zn和Pb的含量受到自然风化过程和人类污染活动的双重影响,其与xfd%的相关性程度低于Cr和V,但高于Cu与Cd。因此,在红河沉积物中可将xfd%作为黏土含量的指示指标,并可应用于重金属含量的粒度校正。

关键词：重金属污染磁性特征河流沉积物红河