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Multi-objective Optimization of a Two-Stage Helical Gearbox to Improve Efficiency and Reduce Height

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Journal of Environmental Science and Engineering(B) 2023年第5期12卷 236-247页

作者： tran Quoc Hung Truong thi thu Huong Ha Noi University of Industry Bac Tu Liem District 143315Ha Noi cityVietnam Thai Nguyen University of Technology Thai Nguyen city 251750Vietnam

The goal of this research is to look at multi-target optimization of a two-stage helical gearbox in order to determine the best key design elements for reducing gearbox height and enhancing gearbox *** do this,the method known as Taguchi and GRA(Grey Relation Analysis)were used in two stages to address the *** single-objective optimization problem was addressed first to close the gap between variable levels,and then the multi-objective optimization problem was solved to determine the best primary design *** first and second stage CWFWs(Coefficients of Wheel Face Width),ACS(Permissible Contact Stresses),and first stage gear ratio were also *** study’s findings were utilized to identify the best values for five critical design aspects of a two-stage helical gearbox.

关键词： Helical gearbox multi-objective optimization gear ratio gearbox height gearbox efficiency.

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河内与北京城市交通运输系统比较研究

河内与北京城市交通运输系统比较研究

作者：陈秋芳（tran thu Phuong）北京交通大学

学位级别：硕士

随着经济的高速增长,各个城市的交通需求也在快速增长。虽然政府不断加大交通基础设施建设力度,但是仍旧滞后于交通需求的迅猛增长,导致了一系列诸如城市交通拥挤,交通事故不断增加,环境污染加剧等城市交通问题的出现。本文的研究目的... 详细信息

随着经济的高速增长,各个城市的交通需求也在快速增长。虽然政府不断加大交通基础设施建设力度,但是仍旧滞后于交通需求的迅猛增长,导致了一系列诸如城市交通拥挤,交通事故不断增加,环境污染加剧等城市交通问题的出现。本文的研究目的就是为了深入了解城市交通运输系统的发展现状,找出问题存在的根源,并相应地提出未来城市交通运输系统的发展对策和建议。本论文首先系统分析了城市综合交通运输系统的相关理论,包括城市综合交通运输体系的定义、发展框架、发展内容以及发展现状和存在的问题。从整体上找出城市交通运输发展的症结,提出保障性的原则和未来大城市的交通模式选择。然后分别对北京市和河内市的交通运输系统现状进行综合分析,包括社会经济状况、交通基础设施、交通流量、客货运输、交通环境和安全以及智能交通等多个方面,从而找出城市交通运输系统存在的问题和影响因素。最后在详细解读国外典型城市交通运输发展状况的基础上,对北京和河内的城市交通运输系统发展情况给出相应的发展启示,这对北京市和河内市未来的交通运输系统发展具有一定的指导意义。

关键词：交通运输系统分析交通模式基础设施公交优先交通需求管理交通安全

越南学生习得名量词“只、头、条”的偏误分析及教学对策

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越南学生习得名量词“只、头、条”的偏误分析及教学对策

作者：陈秋香（tran thu HUONG）辽宁师范大学

学位级别：硕士

在现代汉语中,量词占有一个非常重要的位置。虽然不可称为鳌头独占,但是也能够令人注目。量词基本上分为两类:名量词与动量词。其中,名量词的数量与使用频率最多,也容易让外国学习者产生各种各样的偏误。对学习汉语的外国学习者而言,量... 详细信息

在现代汉语中,量词占有一个非常重要的位置。虽然不可称为鳌头独占,但是也能够令人注目。量词基本上分为两类:名量词与动量词。其中,名量词的数量与使用频率最多,也容易让外国学习者产生各种各样的偏误。对学习汉语的外国学习者而言,量词一直都是一个难以掌握的问题。越南学生更不是一个例外。越南与中国有很多文化的相同之处,这也影响到越南学生学习汉语的过程,有负面性,也有积极性。论文采用文献分析法、数据统计法和对比分析法、调查分析法和访谈法开展研究,在梳理关于名量词的汉语本体知识,概括中国国内研究相关问题的情况,深入理解名量词“只、头、条”的特征与使用范围,指出三个名量词的异同并提供越南语相当的“类词”的基础上,拟定关于名量词“只、头、条”的调查问卷,对越南学生实施问卷调查,总结偏误类型,并具体地分析越南学生学习名量词“只、头、条”的过程中产生的各种偏误原因。最后提供了越南学生学习名量词的对策与汉语教师开展名量词教学的对策。论文不仅让学习者明确量词“只、头、条”的用法,还有助于翻译者,或具有当翻译者的职业规划的越南学生,尤其是笔译翻译者提高汉语水平。期待对针对越南学生的汉语教学提供有益参考。

关键词：名量词习得只头条越南学生

Synthesis of cation exchange resin-supported iron and magnesium oxides/hydroxides composite for nitrate removal in water

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Chinese Journal of Chemical Engineering 2021年第4期34卷 378-384页

作者： Trung Thanh Nguyen Vu Anh Khoa tran Le Ba tran Phuoc Toan Phan Minh Tan Nguyen Long Giang Bach Surapol Padungthon Cong Khiem Ta Nhat Huy Nguyen Nanomaterial Laboratory An Giang University18 Ung Van Khiem St.Dong Xuyen DistLong Xuyen CityAn Giang ProvinceViet Nam Vietnam National University Ho Chi Minh City Linh Trung WardThu Duc DistrictHo Chi Minh CityViet Nam Faculty of Natural Resources and Environment Ho Chi Minh City University of Technology(HCMUT)268 Ly Thuong Kiet St.Dist.10Ho Chi Minh CityViet Nam Faculty of Engineering-Technology-Environment An Giang University18 Ung Van Khiem StDong Xuyen DistLong Xuyen CityAn Giang ProvinceViet Nam Department of Scientific Research and International Relation Bac Lieu University178 Vo Thi Sau St.Ward 8Bac Lieu CityBac Lieu ProvinceViet Nam NTT Institute of High Technology Nguyen Tat Thanh University298-300A Nguyen Tat ThanhHo Chi Minh CityViet Nam Department of Environmental Engineering Khon Kaen University123 Moo 16 Mittraphap Rd.Nai-MuangMuang DistrictKhon Kaen 40002Thailand

In this study,we reported on the concept and practical use of cation exchange resin(CER)for removing anions in water via pretreating the CER with metal *** cation exchange resinsupported iron and magnesium oxides/hydroxides composite(FeMg/CER)was synthesized and introduced as a new and potential adsorbent for selective removal of nitrate ion in the water *** of FeMg/CER were determined by techniques such as Fouriertransform infrared spectroscopy,scanning electron microscopy,and Xray *** results showed that FeMg/CER material had a high nitrate adsorption capacity of 200 mg NO_(3)^()·g^(1)with a fast equilibrium adsorption time of 30 min at pH *** addition,it had good durability of at least 10 times of regeneration,which could be applied to practical water and wastewater treatment.

关键词： Iron oxide/hydroxide Magnesium oxide/hydroxide Cation exchange resin Adsorption Environment Nanomaterials

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历史·现状·趋势——河内管式住宅探析

现代装饰（理论） 2013年第9期 23-25页

作者：陈秋荷 tran thu Ha 浙江理工大学艺术与设计学院

河内管式住宅是越南传统建筑文化民居之一、是本地智慧的建筑展示,散发着独特的魅力。本文对河内管式住宅进行了多角度的观察和分析,整体分析河内管式住宅的历史背景、现状特征与趋势。

关键词：传统建筑文化现状特征整体分析生态建筑设计内管历史背景两层楼檐部联排式住宅城市历史文

Calculation of the ex-core neutron noise induced by individual fuel assembly vibrations in two PWR cores

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Nuclear Science and Techniques 2016年第4期27卷 67-77页

作者： Kiet A.T.Hoang Van-Chung Cao Van-Khanh Hoang hoai-nam tran Institute of Research and Development Duy Tan University K7/25 Quang Trung Da Nang Vietnam American Polytechnic College Trung Son KDC Binh Chanh HCMC Vietnam Research and Development Center for Radiation Technology VINATOM Thu Duc HCMC Vietnam Faculty of Physics and Engineering Physics VNUHCM University of Science HCMC Vietnam Institute for Nuclear Science and Technology VINATOM 179 Hoang Quoc Viet Hanoi Vietnam

Calculation of the neutron noise induced by fuel assembly vibrations in two pressurized water reactor(PWR) cores has been conducted to investigate the effect of cycle burnup on the properties of the ex-core detector noise. An extension of the method and the computational models of a previous work have been applied to two different PWR cores to examine a hypothesis that fuel assembly vibrations cause the corresponding peak in the auto power spectral density(APSD) increase during the cycle. Stochastic vibrations along a random two-dimensional trajectory of individual fuel assemblies were assumed to occur at different locations in the cores. Two models regarding the displacement amplitude of the vibrating assembly have been considered to determine the noise source. Then, the APSD of the ex-core detector noise was evaluated at three burnup steps. The results show that there is no monotonic tendency of the change in the APSD of ex-core detector; however, the increase in APSD occurs predominantly for peripheral assemblies. When assuming simultaneous vibrations of a number of fuel assemblies uniformly distributed over the core, the effect of the peripheral assemblies dominates the ex-core neutron *** behaviour was found similar in both cores.

关键词：燃料组件随机振动中子噪声计算模型压水堆堆芯功率谱密度压水反应堆

Correction to:Enhancing soil water holding capacity and provision of a potassium source via optimization of the pyrolysis of bamboo biochar

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Biochar 2021年第1期3卷 63-63页

作者： tran thi thu Hien Toshiki Tsubota Tomoyuki Taniguchi Yoshiyuki Shinogi Laboratory of Irrigation and Water Management Faculty of AgricultureKyushu UniversityFukuoka 8130395Japan Agricultural Science Institute of Northern Central Vietnam Vietnam Academy of Agricultural SciencesVinhNghe An 44000Vietnam Department of Materials Science Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 8048550Japan West No.5 Building 744 MotookaNishi‑WardFukuoka 8190395Japan

The article“Enhancing soil water holding capacity and provision of a potassium source via optimization of the pyrolysis of bamboo biochar”,written by tran thi thu Hien,Toshiki Tsubota,Tomoyuki Taniguchi and Yoshi-yuki Shinogi was originally published electronically on the publisher’s internet portal on 20th of October 2020 without open *** the author(s)’decision to opt for Open Choice the copyright of the article changed on December 2020 to©“The Author(s)2020”and the article is forth-with distributed under a Creative Commons Attribution 4.0 International License(https://creat iveco ***/licen ses/by/4.0/),which permits use,sharing,adaptation,distribu-tion and reproduction in any medium or format.

关键词： soil potassium optimization

Scaling up private investment in low-carbon energy systems through regional cooperation: Effective trade policy measures

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Resources and Environmental Economics 2019年第2期1卷 80-88页

作者： Kaliappa Kalirajan Huong thi thu tran Yichang Liu Venkatachalam Anbumozhi Crawford School of Public Policy Australian National University Canberra ACT 2601 Australia Economic Research Institute for ASEAN and East Asia Jakarta Indonesia

How to ensure energy supply and reduce environment pollution have turned into governments’ top priorities and key factors to maintain sustainable development. In this context, two major trade and investment agreements that could lead to profound influence on low-carbon energy systems development around the Asia-Pacific region are the Regional comprehensive economic partnership (RCEP) consisted of the Association of Southeast Asian Nations (ASEAN) plus Australia, China, India, Japan, New Zealand, and Republic of Korea and the Belt and road initiative (BRI) initiated by China. In order to have a smooth transition to low-carbon energy systems in Asia, besides RCEP and BRI, it is imperative to boost private sector investment. Success of encouraging private sector investment depends on appropriate government policies towards promoting innovations and reducing financial risks to private investors. The research questions that are examined in this study are: What type of policy measures affects trade in low-carbon transition, particularly renewable energy (RE) transition? How can investment signals and incentives be reframed to scale up private finance in RE? The objective is to investigate and to provide several feasible trade policy and investment policy tools for both national and regional markets that governments could adopt to accelerate the speed of private financing of the low-carbon energy industry, particularly the RE industry.

关键词： private investment low-carbon energy regional cooperation trade policy

transformation CodA Gene to Lily Plants by Agrobacterium tumefaciences Mediated

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Journal of Agricultural Science and Technology(B) 2018年第6期8卷 375-381页

作者： Bui thi thu Huong Dong Huy Gioi Le tran Binh Faculty of Biotechnology Vietnam National University of AgricultureTrau QuyGia Lam 12406HanoiVietnam Institute of Biotechnology Vietnam Academy of Science and TechnologyNghia TanCau Giay 11308HanoiVietnam

Glycinebetaine(GB),an osmotic substance,could improve some stress tolerance in *** gene,originating from bacteria,could translate choline oxidase which stimulates the synthesis of GB in *** create lily lines resistant to heat,Belladonna lily and Yelloween lily had been transferred CodA gene through Agrobacterium *** bacteria harbored a binary vector carrying the hygromycin phosphotransferase,choline oxidase(CodA)and intron-containingβ-glucuronidase(Gus)genes were co-cultivated with lily bulb scales *** result showed that most the bulb scales had developed into bulblets in a regulator-free growth medium,while some expressed the hygromycin-resistance,heat tolerance and Gus gene *** them,one line demonstrated primarily the transcription level expression through reverse transcription polymerase chain reaction(RT-PCR).Moreover,they were tested with the accumulation of GB which was evident that the transferred line had four times of GB volumes higher than that of wild *** original evidence could open a right approach to enhance stress tolerance in lily plants.

关键词： Agrobacterium tumefaciens CodA gene genetic transformation glycinebetaine lily stress tolerance in plants