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化学絮凝结合真空预压处理的渤海湾海洋疏浚泥固结特性

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大连理工大学学报 2022年第6期62卷 626-632页

作者：陈国公武亚军许嘉乐李运红王攀秦荣荣 LE Thanh Hai vu quoc vuong 上海大学土木工程系上海200444 中国冶金地质总局青岛地质勘查院山东青岛266109 越南胡志明市国立大学资源与环境研究院胡志明市740500越南越南水利大学土木工程学院河内116301越南

为了改善渤海湾海洋疏浚泥渗透性差和排水固结时间长的不足,引入化学絮凝结合真空预压的地基处理方法.首先分析了山东东营地区疏浚泥的矿物成分与物理性质,然后采用两种不同的絮凝剂进行了沉降柱试验与真空预压模型试验.结果表明:絮凝剂... 详细信息

为了改善渤海湾海洋疏浚泥渗透性差和排水固结时间长的不足,引入化学絮凝结合真空预压的地基处理方法.首先分析了山东东营地区疏浚泥的矿物成分与物理性质,然后采用两种不同的絮凝剂进行了沉降柱试验与真空预压模型试验.结果表明:絮凝剂APAM添加量越大,混液面沉降速度越快,在添加量为15%时速度最快,约5 min内沉降基本稳定;絮凝剂CaO添加量越大,混液面沉降速度越慢,当添加量越过某一值(10%)时,最终混液面基本保持不变;真空预压排水速率并非絮凝剂添加量越大越快,絮凝剂CaO添加量为0.6%时速率最快,絮凝剂APAM添加量为15%时速率最快.研究成果对于东营疏浚泥地基处理工程实践具有一定的指导意义.

关键词：渤海湾疏浚泥絮凝真空固结

Research on Iron Loss of Switched Reluctance Starter/Generator for Energy Storage

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Protection and Control of Modern Power Systems 2024年第4期9卷 147-159页

作者： Hao Chen Xing Wang Yongqiang Liu vuong Dang quoc Wenju Yan Muhammad Saqib Antonino Musolino Guanjun Wang Yong Qi Ali Asghar Memon Alexandros G.Paspatis the Shenzhen Research Institute China University of Mining and TechnologyShenzhen 515100China the School of Electrical Engineering China University of Mining and TechnologyXuzhou 221116China Xinjiang Institute of Engineering Urumqi 830000China the International Joint Research Center of Central and Eastern European Countries on New Energy EV Technology and Equipment Xuzhou 221008China the International Cooperation Joint Laboratory of New Energy Power Generation and EVs of Jiangsu Province Colleges and Universities Xuzhou 221008China the Xuzhou Key Laboratory of New Energy EV Technology and Equipment Xuzhou 221008China the the School of Electrical Engineering China University of Mining and Tech-nologyXuzhou 221116China the Laboratory of High Performance Electric Machines(HiPems) Hanoi VN 10000Viet Nam the University of Engineering and Technology Lahore 54890Pakistan the Department of Energy Pisa Uni-versity of PisaPisa IT 56126Italy the Wuxi Inspection and Testing Certification Research Institute Wuxi 214000China the Nanjing University of Science&Tech-nology Nanjing 210094China the Mehran University of Engi-neering&Technology Jamshoro PK 76062Sindh the National Technical University of Athens Zografou GR 15780Attica

In order to better realize the energy recovery and storage of hybrid EVs(HEVs),a switched reluctance starter/generator(SRS/G)with both starting and power generation functions is investigated in this ***,the iron loss of SRS/G is mainly studied to reduce the motor loss and improve the power generation ***,the energy storage of hybrid EVs can be effectively ***,a magnetic flux density(MFD)waveforms solution method is proposed to solve the difficulty in calculating the iron loss of the SRS/*** with the commonly used finite element method,the proposed solution method has the advantages of simple,fast and small computational ***,considering the different operating conditions of SRS/G,the iron loss models for both the time-domain and frequency-domain are *** addition,the calculation formula of the variable coefficient Bertotti three-term loss separation is *** the hysteresis loss coefficient,the Steinmetz coefficient and the stray loss coefficient are respectively fitted by the Fourier fitting *** method is also applied to solve the iron loss of SRS/***,through an experimental verification,it is indicated that the development of proposed method has high accuracy.

关键词： Switched reluctance starter/generator energy storage iron loss finite element method magnetic flux density(MFD)

Properties of poly（1-naphthylamine）/Fe3O4 composites and arsenic adsorption capacity in wastewater

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Frontiers of Materials Science 2016年第1期10卷 56-65页

作者： Minh Thi TRAN Thi Huyen Trang NGUYEN quoc Trung vu Minh vuong NGUYEN Faculty of Physics Hanoi National University of Education 136-Xuanthuy Street Caugiay District Hanoi Vietnam Faculty of Chemistry Hanoi National University of Education 136-Xuanthuy Street Caugiay District Hanoi Vietnam Department of Physics Quynhon University 170 An Duong Vuong Quynhon Vietnam

The research results of poly（1-naphthylamine）lFe3O4 （PNA/Fe3O4） nanocomposites synthesized by a chemical method for As（Ⅲ） wastewater treatment are presented in this paper. XRD patterns and TEM images showed that the Fe3O4 grain size varied from 13 to 20 nm. The results of Raman spectral analysis showed that PNA participated in part of the PNA/Fe3O4 composite samples. The grain size of PNA/Fe3O4 composite samples is about 25-30 nm measured by SEM. The results of vibrating sample magnetometer measurements at room temperature showed that the saturation magnetic moment of PNA/Fe3O4 samples decreased from 63.13 to 43.43 emu/g, while the PNA concentration increased from 5% to 15%. The nitrogen adsorption-desorption isotherm of samples at 77 K at a relative pressure PIPo of about 1 was studied in order to investigate the surface and porous structure of nanoparticles by the BET method. Although the saturation magnetic moments of samples decreased with the polymer concentration increase, the arsenic adsorption capacity of the PNA/Fe3O4 sample with the PNA concentration of 5% is better than that of Fe3O4 in a solution with pH = 7. In the solution with pH 〉 14, the arsenic adsorption of magnetic nanoparticles is insignificant.

关键词： poly(1-naphthylamin)/Fe3O4 nanocomposite magnetization arsenic adsorption

The Challenges of Integrated Management of Mekong River Basin in Terms of People’s Livelihood

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Journal of Water Resource and Protection 2010年第1期2卷 61-68页

作者： Alebel Abebe BELAY Shah Md. Atiqul HAQ vuong quoc CHIEN Badandi ARAFAT 不详

Mekong River Basin is a life for many people in six south East Asian countries. The river basin is very productive and has crucial activities like: fishing, agriculture, hydroelectric power, transportation, biodiversity and so on. However, due to mismanagement, political intentions and one way interest only for development, the river basin has already started experiencing complications. The major challenges found out were, huge hydroelectric dam constructions and other projects, high population pressure, lack of cooperation among riparian states (especially upper Mekong region and lower one), and lack of proper management system. This leads to inequitable resource use, impact on water quality, biodiversity loss, and disasters like flooding. It is a high time to make a joint venture among riparian countries for sustainable use of the resource. Multi lateral cooperation and commitment among user countries by consulting all stakeholders will benefit all to use this precious resource equitably without major ecological impacts on the river basin.

关键词： Challenges Ecology IWRM Livelihood Mekong River Sustainability

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越南老街省第一高中学校汉语教学现状调查

越南老街省第一高中学校汉语教学现状调查

作者：王国正（vuong quoc CHINH）广东外语外贸大学

学位级别：硕士

随着中国经济的发展和中国对外交流与合作,汉语在全球的地位逐渐提高。本研究项目有助于了解越南老街省第一高中学校的汉语教学的情况。研究使用问卷和访谈的方法,根据对象采用不同的方式进行调查,收集资料后再用综合、归纳、统计、演... 详细信息

随着中国经济的发展和中国对外交流与合作,汉语在全球的地位逐渐提高。本研究项目有助于了解越南老街省第一高中学校的汉语教学的情况。研究使用问卷和访谈的方法,根据对象采用不同的方式进行调查,收集资料后再用综合、归纳、统计、演绎、分析等方法来研究,对老街省第一高中校汉语做出相当全面的评估。论文主要由以下几个部分组成:绪论主要概述了越南和老街省汉语教学历史状况;第二、三、四、五章对越南老街省第一高中学校的基本汉语教学情况、汉语教材与教学设备情况、汉语教师情况、汉语学习者情况作了详细的调查。通过调查,我们可以看出越南老街省第一高中学校的汉语教学规模逐年增加,教学质量也越来越高。但是这所学校的汉语教学仍然存着一些问题,比如教师学历普遍不高、师生比例不合理、课程设置没有满足学生的要求、多媒体辅助教学和教学设备明显不足。最后针对学校汉语教学情况提出建议。调查希望对老街省第一高中未来的汉语教学有促进作用。

关键词：越南老街省汉语教学现状调查

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香姜,越南植物一新记录种（英文）

热带亚热带植物学报 2019年第1期27卷 99-101页

作者：武春阳阮国平邓重良严德重高飞平武进正叶幸儿夏念和雄王大学越南科学与技术院越南国立自然博物馆农业遗传研究所河内药学院越南科学与技术院科学与技术研究生院中国科学院华南植物园植物资源保护与可持续利用重点实验室广东省数字植物园重点实验室广州510650

据已有文献记载,香姜(姜科)(Alpinia coriandriodora D. Fang)仅分布于广西,现首次在越南发现其分布。该种在形态上与竹叶山姜(A. bambusifolia D. Fang)相近,但其叶片椭圆状披针形、唇瓣浅黄色及带红褐色条纹和花药附属体三角状而与后... 详细信息

据已有文献记载,香姜(姜科)(Alpinia coriandriodora D. Fang)仅分布于广西,现首次在越南发现其分布。该种在形态上与竹叶山姜(A. bambusifolia D. Fang)相近,但其叶片椭圆状披针形、唇瓣浅黄色及带红褐色条纹和花药附属体三角状而与后者有别。提供该种详细的形态学描述以及图版,亦包括在越南的分布及生态的资料。凭证标本保存于越南国立自然博物馆(VNMN)和中国科学院华南植物园(IBSC)。

关键词：姜科山姜属香姜新记录越南