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越南北部Cao Bang省与W-Sn矿化有关的Piaoac花岗岩岩石学

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越南北部Cao Bang省与W-Sn矿化有关的Piaoac花岗岩岩石学

作者：阮俊英（Nguyen tuan anh）中国科学技术大学

学位级别：硕士

白垩纪岩浆岩在越南北部和中国华南(NV-SCB)广泛分布,与锡多金属矿化有着紧密的联系。研究这些岩浆岩的成因不仅对认识越南北部-华南(NV-SCB)的演化有重要意义,而且有利于锡多金属矿床的勘探。目前,对这些与矿化有关的岩浆岩仍缺乏约束... 详细信息

白垩纪岩浆岩在越南北部和中国华南(NV-SCB)广泛分布,与锡多金属矿化有着紧密的联系。研究这些岩浆岩的成因不仅对认识越南北部-华南(NV-SCB)的演化有重要意义,而且有利于锡多金属矿床的勘探。目前,对这些与矿化有关的岩浆岩仍缺乏约束其成因和形成构造环境的深入研究。已出版的越南北部-华南(NV-SCB)与矿化有关岩浆岩的相关数据和构造模型,可以提供越南北部(NV)和华南(SCB)在晚白垩世相对明晰的演化机制和过程。在本研究中,我们展示了越南北部Cao Bang省Piaoac花岗岩体新的地质学、地球化学、矿物化学和Hf同位素数据,并将其与中国南部的都龙锡多金属矿区对比。本研究阐明了Cao Bang地区与钨锡矿化有关的岩浆岩的成因。此外,我们进一步约束了越南北部-华南(NV-SCB)晚白垩世岩石的成因和构造背景。Piaoac岩体包括中到细粒的二云母花岗岩,具斑状结构(含长石斑晶)。这些花岗岩以高硅(Si02:72.37-73.07 wt.%)、强过铝质(ASI=1.61-1.65)、富集Rb、U、Ta和P、亏损Ba、Nb、La、Eu和Ti为特征。侵入体中锆石高的Th/U比(>0.1)和清晰的振荡环带指示了锆石为岩浆起源。Piaoac岩体的结晶年龄约82Ma,指示晚白垩世。岩体低的CaO/Na2O比(<0.3)和高的SiO2含量暗示了花岗岩熔体通过变泥质岩的部分熔融形成。花岗岩的锆石负的εHf(t)(-9.69 to-0.9)和二阶段模式年龄(TDM2)暗示了母岩浆源于新元古代变沉积岩(1.2 Ga to 1.7 Ga),这与华南的基底岩石一致。两个主要因素影响了这些花岗岩中的钨锡矿化:首先,斜长石、黑云母和长石的高度的分离结晶使W、Sn在花岗质熔体积累;其次,低氧逸度(低于MH缓冲剂)环境能有效地将W、Sn迁移至热液流体,并且导致W-Sn矿物的沉淀。结合文献中与中国西南部与W-Sn矿化有关花岗岩的资料,即它们形成于岩石圈减薄和软流圈上涌的环境,而Piaoac岩体与这些花岗岩具有相似的特征和形成时代,故暗示了它们处于相同的构造环境。地球化学数据指示了Piaoac花岗岩形成于与晚白垩世岩浆活动有关的伸展构造背景,这与华南板块发生大规模的岩石圈伸展有关。

关键词： Piaoac花岗岩 W-Sn矿化越南北部

Characteristics of Filtered Neutron Beam Energy Spectra at Dalat Reactor

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World Journal of Nuclear Science and Technology 2014年第2期4卷 96-102页

作者： Tran tuan anh Pham Ngoc Son Vuong Huu Tan Pham Dinh Khang Phu Chi Hoa Nuclear Research Institute Dalat Vietnam The University of Dalat Dalat Vietnam Vietnam Agency for Radiation and Nuclear Safety Hanoi Vietnam

Filtered neutron technique was applied for producing quasi-monoenergetic neutron beams of 24 keV, 54 keV, 133 keV and 148 keV at the horizontal neutron channel No. 4 of the Dalat Nuclear Research Reactor. The study on physical characteristics of these beam lines has been carried out for efficient applications in neutron capture experiments. The filtered neutron spectrum of each beam has been simulated by Monte-Carlo method and experimentally measured by a gas-filled protonrecoil spectrometer. The neutron fluxes of these filtered beams were measured by the activation technique with standard foils of 197Au, using a high efficient HPGe digital gamma-ray spectrometer.

关键词： Neutron Filter Proton-Recoil

Luminescent and magnetic properties of multifunctional europium(Ⅲ) complex based nanocomposite

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Journal of Rare Earths 2019年第11期37卷 1237-1241页

作者： Hoang Thi Khuyen Nguyen Thanh Huong Tran Thu Huong Pham Thi Lien Do Thi anh Thu Nguyen Thi anh Huong Wieslaw Strek Le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau CiayHanoiViet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry University of Natural SciencesHanoi National University19 Le Thanh TongHoan KiemHanoiViet Nam Institute of Low Temperature and Structure Research PASOkolna 2Wroclaw 50-422Poland Duy Tan University K7/25 Quang TrungDa DangViet Nam

The luminescent rare earth(RE)complex based multifunctional nanocomposites offer new potential applications of multimodal imaging(magnetic resonance imaging(MRI),fluorescent bioimaging,etc.)that can be associated with therapeutic *** this study,we report some results obtained with novel multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites that are composed of europium(Ⅲ)complex with 1-(2-naphthoyl)-3,3,3-trifluoroacetone ligands(NTA)(Eu(NTA)3)and superparamagnetic Fe3O4 *** nanocomposites were functionalized with an amine group for biomedicine *** multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites exhibit both good magnetic behavior of Fe3O4 nanoparticles as a core and strong fluorescent property of europium(Ⅲ)*** characterizations were analyzed by XRD,SEM,EDX and FTIR *** optical properties were studied in detail by UV-VIS spectra and luminescent emission *** magnetic property was estimated by *** effect of concentrations of luminescent Eu(NTA)3 complex on luminescent and magnetic properties is discussed.

关键词： Multifunctional nanocomposite Luminescence Magnetic Europium(Ⅲ)complex Fe3O4 Rare earths

Assessing Satellite-Based Precipitation Products to Create Flood Forecasting in the Da River Basin, Vietnam

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Journal of Geoscience and Environment Protection 2019年第11期7卷 113-123页

作者： Le Viet Son Luong Ngoc Chung Bui tuan Hai Sai Hong anh Nguyen Duy Quang Division for Water Resources Planning for the North Region Institute of Water Resources Planning Hanoi Vietnam Board of directors Institute of Water Resources Planning Hanoi Vietnam Department of Agro-Environmental Sciences Graduate School of Bioresource and Bioenvironmental Sciences Kyushu University Fukuoka Japan

The Da River Basin is an international basin where available access to hydrological data is limited;it has a total basin area of 52,900 km2, about 50% of the area in which it is located, Vietnam. The Da River is the primary source of water for agriculture in 25 provinces and cities, and the primary source of drinking water for more than 30 million people in both urban and rural areas. It has huge economic and historical value. However, flood forecasting for the Da River basin has not been adequately addressed yet because of the challenge of the inconsistency, scarcity, poor spatial representation, as well as difficult access and incompleteness of the availability of ground observed rainfall data. In this research, the IFAS model has been utilized to assess the benefits of using satellite-based precipitation products to create flood forecasting for the whole research area. The results showed that the Integrated Flood Analysis System (IFAS) model was able to integrate the satellite-based precipitation products for simulating the flood event in the Da River basin. Also, the 3B42RT algorithm showed a definite improvement in reproducing the flood peak and low flow very well in the research area. These results could be used to enhance the effectiveness of flood management strategy in the basin.

关键词： IFAS Flood Flow 3B42RT and GSMaP Algorithm

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微电网电压不平衡的分层补偿控制策略

哈尔滨工业大学学报 2016年第3期48卷 46-52页

作者：黎金英艾欣邓玉辉新能源电力系统国家重点实验室(华北电力大学) 北京102206 绥和工业学院电气与电子工程学院越南绥和56000

微电网是消纳分布式电源的有效手段之一,然而也带来了其自身的电压控制的难题,特别是公共连接点处的三相电压不平衡问题比较突出,为此提出一种微电网公共连接点电压双极补偿控制方法,上层控制发送与电压的正序和负序分量有关的控制信号... 详细信息

微电网是消纳分布式电源的有效手段之一,然而也带来了其自身的电压控制的难题,特别是公共连接点处的三相电压不平衡问题比较突出,为此提出一种微电网公共连接点电压双极补偿控制方法,上层控制发送与电压的正序和负序分量有关的控制信号,采用双电流环的控制器可得到电流给定值;下层控制通过双电流环控制器实施.针对PCC点三相电压不平衡的问题,应用dq旋转坐标分解原理,提出一种基于改进解耦的双同步坐标系锁相环(IDDSRF-PLL)的控制方法,能够实现正负序分量的独立控制,并通过控制给定模型的正负序电流和电压不平衡补偿控制器得到三相平衡电压,使得公共连接点母线电压的二倍频波动部分为零,从而实现了对三相电压不平衡的补偿控制.利用MATLAB/Simulink对微电网接入电网进行建模仿真,结果表明,分层控制方法能够较好的实现对微电网的电压控制.

关键词：微电网三相电压不平衡锁相环 PQ控制分层控制

Examining unobserved factors associated with red light running in Vietnam:A latent class model analysis

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Transportation Safety and Environment 2022年第1期4卷 110-122页

作者： Tien Dung Chu Tomio Miwa tuan anh Bui Quang Phuc Nguyen Quang Huy Vu Department of Highway and Traffic Engineering University of Transport and CommunicationsNo.3 Cau Giay StreetLang Thuong WardDong Da DistrictHanoi 10001Vietnam Institute of Materials and Systems for Sustainability Nagoya UniversityFuro-choChikusa-kuNagoya cityAichi Prefecture464-8603Japan

Red-light running(RLR)is a crucial violation that causes traffic accidents and *** factors that affect RLR is very significant to reduce the potential of this *** studies have paid considerable attention to the observable factors,but not to unobservable *** study aims to examine the effects of observable and unobservable factors on *** study uses a latent class model(LCM)to assign individuals into two classes—red-light-respectful and red-light-disrespectful road users—by surveying 751 respondents who use private transportation *** study incorporates psychological determinants into the LCM to account for unobservable *** contribution of this study is the in-depth investigation into law-respectful and law-disrespectful behaviours and intentional and unintentional *** a study has not yet been conducted in the existing *** addition,a comprehensive comparison of the LCM and a traditional ordered probit model was ***,the results suggest that the LCM is superior to the model that does not consider latent *** estimation results are in alignment with previous studies on RLR:males,younger drivers/riders,less educated road users and motorcyclists are more likely to run red *** analysis of the latent variables shows that surrounding conditions—the behaviour of other violators,the absence of traffic police,and long waiting times—increase the possibility of *** on these results,we provide suggestions to policymakers and traffic engineers:the implementation of enforcement cameras and penalties for violators are critical countermeasures to minimize the potential of RLR.

关键词： red light running(RLR) developing country latent class model(LCM) multiple indicator multiple cause(MIMIC)model latent variables(LVs) motorcycles(MCs) traffic violation

我国南方水稻黑条矮缩病流行动态及预测预报实践

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中国植保导刊 2016年第1期36卷 20-26页

作者：刘万才陆明红黄冲周国辉 Hoang anh tuan 全国农业技术推广服务中心北京100125 华南农业大学广州510500 越南农业农村发展部植物保护局越南河内115302

自2009年南方水稻黑条矮缩病在中国南方稻区局部首次暴发为害以来,在农业部的高度重视和支持下,全国农业技术推广服务中心组织全国植保体系系统开展病害的流行规律、调查监测和预测预报技术研究,初步掌握了病害的发生流行动态和特点,明... 详细信息

自2009年南方水稻黑条矮缩病在中国南方稻区局部首次暴发为害以来,在农业部的高度重视和支持下,全国农业技术推广服务中心组织全国植保体系系统开展病害的流行规律、调查监测和预测预报技术研究,初步掌握了病害的发生流行动态和特点,明确了影响我国南方稻区病害发生的毒源地主要为中南半岛的越南中北部及红河平原,其次为我国的海南和云南南部山区。2010年以来,制定了病害测报技术规范,建立了监测预警网络体系,积极开展预测预报工作。南方水稻黑条矮缩病的监测预报经历了由"恐慌"到"淡定"、由"心中无数"到"心中有数"、由"无所适从"到"有条不紊"的过程,病害预测的准确性明显提高,在有效指导防治、控制病害流行、减轻危害损失方面发挥了重要作用。

关键词：南方水稻黑条矮缩病发生动态流行因素预测预报

Structural, Optical and Photocatalytic Properties of Cu²⁺ Doped ZnO Nanorods with Using HMTA Solvent Prepared by Hydrothermal Method

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Journal of Materials Science and Chemical Engineering 2023年第7期11卷 20-30页

作者： Nguyen Thi Tuyet Mai Nguyen Thi Lan Trinh Xuan anh Ta Ngoc Dung Huynh dang Chinh School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam

In this experiment, Cu2+ doped ZnO (Cu-ZnO) nanorods materials have been fabricated by hydrothermal method. Cu2+ ions were doped into ZnO with ratios of 2, 5 and 7 mol.% (compared to the mole’s number of Zn2+). The hexamethylenetetramine (HMTA) solvent used for the fabrication of Cu-ZnO nanorods with the mole ratio of Zn2+:HMTA = 1:4. The characteristics of the materials were analyzed by techniques, such as XRD, Raman shift, SEM and UV-vis diffuse reflectance spectra (DRS). The photocatalytic properties of the materials were investigated by the decomposition of the methylene blue (MB) dye solution under ultraviolet light. The results show that the size of Cu-ZnO nanorods was reduced when the Cu2+ doping ratio increased from 2 mol.% to 7 mol.%. The decomposition efficiency of the MB dye solution reached 92% - 97%, corresponding to the Cu2+ doping ratio changed from 2 - 7 mol.% (after 40 minutes of ultraviolet irradiation). The highest efficiency for the decomposition of the MB solution was obtained at a Cu2+ doping ratio of 2 mol.%.

关键词： Cu2+ Doped ZnO Nanorods ZnO Nanomaterials Hexamethylenetetramine (HMTA) Photocatalytics Methylene Blue Hydrothermal Method UV Irradiation

Structure, Plastic Deformation of Polyethylene: A Molecular Dynamics Method

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Advances in Materials Physics and Chemistry 2020年第6期10卷 125-150页

作者： Dung Nguyen Trong tuan Tran Quoc Hue dang Thi Minh Cuong Nguyen Chinh Van Duong Quoc Faculty of Physics Hanoi National University of Education Ha Noi Vietnam Faculty of Basic Science University of Transport Technology Ha Noi Vietnam Faculty of Electrical and Electronics Engineering Thuyloi University Ha Noi Vietnam

This paper studies the influence factors of atoms number (N) at temperature (T) and after annealing time (t) on the structure shape and the plastic deformation of Polyethylene C2H4 (PE) by the Molecular Dynamics (MD) method with Dreading pair interaction, cyclic boundary conditions and plastic deformation of Polyethylene (PE) be done by stretching method according to the z-axis. The results of structure, plastic deformation of PE are analyzed through size (l), the total energy of the system (Etot), shape and associated energy (Ebond), angular binding energy (Eangle), energy Edihedral, interactive energy Vander Walls (Enon-bonding). When increasing N, t leads to the number of structural units of Face-Centred Cubic (FCC), Body-Centered Cubic (BCC) and Hexagonal Close-Packed (HCP) increasing, but Amorphous (Amor) decreases while the angle between the atoms is a constant corresponding to 109.5°. Besides, the length of the link (r) increases from r = 1.529 Å to r = 1.558 Å while the plastic deformation energy of PE gets an enormous change and the bonding angle at 109.27°. The length of the link r = 1.529 Å and the size (l) of the PE material increase from l = 3.7

关键词： Molecular Dynamics Atoms Number Annealing Time Polyethylene Plastic Deformation