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Journal of Environmental Sciences 2015年第10期27卷 38-47页

作者： Huy thanh Vo Tsuyoshi Imai Truc thanh Ho thanh-Loc Thi Dang Son Anh Hoang Division of Urban Infrastructural Engineering Mien trung University of Civil Engineering Division of Environmental Science and Engineering Yamaguchi University

Recently emerging disadvantages in conventional disinfection have heightened the need for finding a new solution. Developments in the use of high pressure carbon dioxide for food preservation and sterilization have led to a renewed interest in its applicability in wastewater treatment and water disinfection. Pressurized CO2 is one of the most investigated methods of antibacterial treatment and has been used extensively for decades to inhibit pathogens in dried food and liquid products. This study reviews the literature concerning the utility of CO2 as a disinfecting agent, and the pathogen inactivation mechanism of CO2 treatment is evaluated based on all available research. In this paper, it will be argued that the successful application and high effectiveness of CO2 treatment in liquid foods open a potential opportunity for its use in wastewater treatment and water disinfection. The findings from models with different operating conditions（pressure, temperature, microorganism, water content, media …） suggest that most microorganisms are successfully inhibited under CO2 treatment. It will also be shown that the bacterial deaths under CO2 treatment can be explained by many different ***, the findings in this study can help to address the recently emerging problems in water disinfection, such as disinfection by-products（resulting from chlorination or ozone treatment）.

关键词： High pressure CO2 Inactivation effect Inactivation mechanism

Taxonomic notes of three tea-plants(Camellia ***)recently described in Vietnam

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Beverage Plant Research 2022年第1期2卷 174-176页

作者： Nguyen trung thanh Luong Van Dung Le Nguyet Hai Ninh Quang Cuong Truong Shixiong Yang Faculty of Biology VNU University of Science334 Nguyen TraiHanoi 100000Vietnam Faculty of Biology Dalat UniversityPhu Dong ThienVuong str.01Dalat66106Lam DongVietnam Faculty of Nong Lam Hoa Lu UniversityNinh Binh 40000Vietnam Bidoup Nui Ba National Park Tran Hung Dao str.5EDalat66116Lam DongVietnam CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina

Camellia sinensis *** is a heterotypic synonym of *** *** flosculora and *** were excluded from ***.

关键词： notes Vietnam Camellia

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基于WIFI指纹方法的室内定位系统研究

基于WIFI指纹方法的室内定位系统研究

作者： VU thanh trung 湖南大学

学位级别：硕士

全球定位系统(GPS)有效地解决了室外的定位问题。然而,室内定位问题是研究领域中的一个热点难点问题。由于GPS在室内几乎不起作用,因此,研究者们提出了许多备选方案。其中最具潜力和最受欢迎的方案是指纹识别定位。该方案需要一个训练阶... 详细信息

全球定位系统(GPS)有效地解决了室外的定位问题。然而,室内定位问题是研究领域中的一个热点难点问题。由于GPS在室内几乎不起作用,因此,研究者们提出了许多备选方案。其中最具潜力和最受欢迎的方案是指纹识别定位。该方案需要一个训练阶段,用于收集需要定位到数据库(称之为无线电地图)的学校的无线电信号强度样本(RSS)。无线电信号可以来自WiFi接入点,GSM基站或其他RF网络。WiFi以其高普及率优先被选择为室内定位系统的主要信号。于是,在定位阶段,用于定位的移动设备可以通过对比收集到的当前RSS样本和在训练阶段建立的无线电地图进行定位。我们在Android平台上开发了基于WiFi指纹识别方法的室内定位系统,并应用机器人系统配合许多部署在地面上的廉价RFID来使训练过程自动化。该系统可以定期更新无线电地图映射到当前的RSS模板,不仅能大大减少人力,而且能保持系统的定位精度。该实验在58平方米的108个参考点的实验室中进行。系统实现了人工手动收集训练数据库下3至6米的平均精度;机器人自动收集训练数据库下1至5米的平均精度。实验结果表明自动数据采集不仅大大减少了人力,而且能够保持系统的定位精度的优势。

关键词：无线通信室内定位 WiFi指纹识别 RFID

三角帆蚌在越南池塘和河道养殖生长发育及环境重要因子分析

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三角帆蚌在越南池塘和河道养殖生长发育及环境重要因子分析

作者： NGUYEN trung thanh 上海海洋大学

学位级别：硕士

本论文报道了不同养殖模式下三角帆蚌的生长发育及几个环境因子的研究结果。研究内容分为4部分:(1)池塘养殖条件下三角帆蚌生长情况和(2)河道养殖条件下三角帆蚌的生长情况;(3)三角帆蚌的性腺发育评价;(4)养殖水体浮游植物及水质因子分... 详细信息

本论文报道了不同养殖模式下三角帆蚌的生长发育及几个环境因子的研究结果。研究内容分为4部分:(1)池塘养殖条件下三角帆蚌生长情况和(2)河道养殖条件下三角帆蚌的生长情况;(3)三角帆蚌的性腺发育评价;(4)养殖水体浮游植物及水质因子分析。研究结果如下:三角帆蚌的整个生长周期,60至180日龄(秋季后期和冬季前期)壳长、壳宽、壳高是快速增长的阶段,180到270日龄出现增长延缓,180至270日龄(冬季后期和春季前期)是缓慢增长的阶段,尤其是210-240日龄(水温最低)是生长最慢的时间,270至330日龄(春季后期和夏季前期)由于水温逐渐增高所以生长逐渐增快。300至360日龄是增长最快的阶段。360至420日龄增长变慢。实验I(池塘)贝壳性状及体重高于实验II(河道)。池塘内(I)三角帆蚌90日龄三角帆蚌日增长率(ADG)达到最高为壳长0.548mm/日、壳高0.127mm/日、壳宽0.111mm/日,120日龄养殖时ADG为壳长0.388mm/日、壳高0.116mm/日、壳宽0.110mm/日,150日龄时壳长达到0.416mm/日、壳高0.103mm/日、壳宽0.218mm/日。河道内(II)三角帆蚌90日龄壳长、壳高、壳宽增长率分别为0.479mm/日,0.134mm/日,0.147mm/日。ADG结果表明了一个增长的趋势是壳长、壳高、壳宽增长速度最快在90至150日龄,然后ADG在180日龄至240日龄缓慢。池塘内(I)三角帆蚌60-90日龄壳长比生长率(SGR)达到最高(1.389±0.06%/日)和其它阶段差异有统计学意义(P0.05)。ADG最快点在150日龄时(池塘内的三角帆蚌达0.473±0,011(g/日),河道内的三角帆蚌达0.381±0.065(g/日))。150-180日龄日间体重增长速度减慢,池塘为0.059±0.022(g/日),河道为0.085±0.031(g/日)。210-240日龄增长速度更慢,池塘内的三角帆蚌为0.028±0.022(g/日),河道内的三角帆蚌为0.077±0.032(g/日)。240-270 I和II分别为0.412±0.024(g/日)和0.388±0.023(g/日)。三角帆蚌体重比增长速率(SGRw)在60-90日龄阶段达到最高,I和II分别为3.882%/日和4,668%/日。180-210日龄增长最慢,I和II分别为0,079%/日和0.998%/日。在全周期内平均SGRw I和II分别为1.410%/日和1.574%/日,差异没有统计学意义(P>0.05)。120-270日龄SGRw差异不明显(P>0.05)。池塘和河道水体的浮游植物组成十分丰富,包括大约8门,71种类。池塘内绿藻占优势;河道内硅藻占优势。池塘内特征的种类是Pediastrum sp。河道内叶绿素含量高于河道内,池塘内绿藻占78.3%,蓝藻占69.2%;河道内绿藻门占52.2%,蓝藻门占61.5%,河道内藻类主要是硅藻。池塘内的浮游植物量高于河道内,但多样性指数低于河道内。研究的水环境指标包括水温、p H值、透明度(SD)、溶解氧(DO)、盐度(S)、硬度(H)。水温研究时间池塘和河道平均范围分别在25.5 C-36.5 C和24 C-32.5 C。池塘水体的水温最高为36.5C(夏季后期和秋季前期),最低为25.5C(冬季后期和春季前期);河道内最高为32.5C,最低为24 C,二者均在三角帆蚌的适温范围内。平均透明度池塘高于河道(36.79厘米和33.42厘米)。池塘和河道的透明度都在理想范围(30-40厘米)。溶解氧(DO)在高范围内(池塘水体为4.5-6.5mg/l、河道水体为5.5-7mg/l),DO在11月份最低池塘水体为4.5mg/l,河道水体为5.5m

关键词：三角帆蚌生长发育浮游植物水质指标

Prolonged post-thaw culture of embryos does not improve outcomes of frozen human embryo transfer cycles: A prospective randomized study

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Asian pacific Journal of Reproduction 2019年第6期8卷 260-266页

作者： Minh Tam Le Van trung Nguyen thanh Tung Nguyen MBlake EVans Thai thanh Thi Nguyen Tam AnThi Nguyen Dinh Duong Le Vu Quoc Huy Nguyen Ngoc thanh Cao Micah J.Hill Department of Obstetrics and Gynecology Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Center for Reproductive Endocrinology and Infertility Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Department of Histology and Embryology Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam Walter Reed National Military Medical Center 8901 Rockville PikeBethesdaMD20889USA Department of Public Health Hue University of Medicine and PharmacyHue University06 Ngo Quyen StreetHueVietnam

Objective:To evaluate the impact of prolonged post-thaw embryos culture on pregnancy outcome during frozen embryo transfer ***:This prospective cohort study evaluated 324 thaw transfer cycles with 819 embryos from 269 patients at the Center for Reproductive Endocrinology and Infertility of Hue University Hospital in *** frozen embryo transfer cycles were divided into two groups at the time of thawing:the short culture group(2-hour post-thaw culture)and the overnight culture group(overnight culture for 18 h)before the embryo was transferred into the *** rates of embryo intact,grade A embryo at frozen and transfer time and continuing cleavage were *** clinical outcomes including serum beta-human chorionic gonadotropin,clinical pregnancy and implantation rate were evaluated after 14 days,4 weeks,6 weeks,respectively,after embryo ***:Human chorionic gonadotropin positive occurred in 39.5%of patients in the short culture group compared to 25.9%in the overnight culture group with risk difference(RD)=13.6%,relative risk(RR)=1.343,95%confidence interval(CI)1.085-1.663,P<*** pregnancy rate of the short culture group and overnight culture group was 33.3%and 24.1%,respectively(RD=9.2%,RR=1.242,95%CI 0.996-1.549,P=0.06)and the implantation rate in the short culture group and overnight culture group was 16.5%and 11.0%,respectively(RD=5.5%,RR=1.244,95%CI 1.046-1.479,P=0.01).In women of advanced age(≥35 years)and women who received 3 embryos,pregnancy outcomes were found to be significantly(P<0.05)higher in the short culture than in the overnight culture ***:The prolonged post-thaw culture period does not increase pregnancy outcome in comparison with the short culture.

关键词： Embryo vitrification Post-thaw culture Frozen embryo transfer Biochemical pregnancy rate Clinical pregnancy rate Implantation rate

Research to Produce Ethanol from Seaweed Biomass Cladophora sp

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材料科学与工程（中英文B版） 2013年第10期3卷 670-676页

作者： Vo thanh trung Bui Minh Ly Le Nhu Hau Nguyen thanh Hang Nhatrang Institute of Technology Reasearch and Application Nha Trang Viet Nam Ha Noi University of Science and Technology Ha Noi Viet Nam

Hepatitis B vaccination status and associated factors among health science students

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Asian Pacific Journal of Tropical Medicine 2023年第5期16卷 213-219页

作者： Binh thanh Nguyen Lan Y Vo Tap Van Nguyen Minh Cong Vo Tinh Dang Pham Han Thi Ngoc Nguyen Lynda Boyer-Chu Giao huynh Faculty of Medicine Tra Vinh UniversityTra Vinh CityTra Vinh ProvinceVietnam Faculty of Public Health University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityVietnam Faculty of Medical Management Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam Department of Ear Nose Throat-Head and Neck Surgery FV hospitalHo Chi Minh CityVietnam Department of Anaesthesia and Intensive Care FV hospitalHo Chi Minh CityVietnam Infection Control Department University Medical Center Ho Chi Minh CityHo Chi Minh CityVietnam San Francisco Unified School District San FranciscoCaliforniaUSA

Objective:To evaluate hepatitis B virus(HBV)vaccine coverage and its associated factors among health science students in ***:This cross-sectional study involving 459 health science students at Tra Vinh University was conducted between April and June *** were collected using a structured questionnaire with items on sociodemographic characteristics,knowledge and attitude about HBV,and vaccination status.A multivariable logistic regression model was used to explore the factors associated with vaccination ***:The majority of participants were female(65.8%)and enrolled at the medical school(56.2%).A total of 30.3%participants received the full dose of the HBV *** percentages of participants with sufficient knowledge and positive attitudes toward HBV infection were 75.2%and 43.4%,*** was 11.8 times higher in sixth-year medical students than any healthcare student in their first-year[adjusted odds ratio(aOR)11.8,95%CI 3.1-45.1,P<0.001],and the coverage was also significant higher in those who had sufficient knowledge(aOR 2.0,95%CI 1.1-3.9,P<0.05)and positive attitudes(aOR 3.0,95%CI 1.9-4.8,P<0.05)than in their ***:The majority of students were not fully vaccinated against HBV,indicating they were vulnerable to the *** and authorities should reinforce health education messages aimed at encouraging all students to get vaccinated with the HBV vaccine,enhance their awareness and knowledge of HBV,and improve attitudes toward HBV infection prevention.

关键词： Hepatitis B Knowledge Attitude Practice Vaccination Students

The Optimal Stopping Time for Selling an Asset When It Is Uncertain Whether the Price Process Is Increasing or Decreasing When the Horizon Is Infinite

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American Journal of Operations Research 2018年第2期8卷 82-91页

作者： Nguyen Khac Minh Nguyen thanh trung Pham Van Khanh Thang Long Institute of Mathematics and Applied Science Hanoi Vietnam Faculty of Fundamental Science Military Academy of Logistics Hanoi Vietnam

Assume that we want to shell an asset with unknown drift but known that the drift is a two value random variable, and the initial distribution can be estimated. As time goes by, this distribution is updated and base on the probability of the drift takes the small one gives us the stopping rule. Research results show that the optimal strategy to sell the asset is if the initial probability that the drift receives a small value greater than a certain threshold then liquidates the asset immediately, otherwise the asset holder will wait until the probability of the drift receives a small value passing a certain threshold, it is the optimal time to liquidate the asset.

关键词： Optimal Stopping Time Incomplete Information Probability Process

Mean Threshold and ARNN Algorithms for Identification of Eye Commands in an EEG-Controlled Wheelchair

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Engineering（科研） 2013年第10期5卷 284-291页

作者： Nguyen thanh Hai Nguyen Van trung Vo Van Toi Biomedical Engineering Department International University Vietnam National University Ho Chi Minh City Vietnam Faculty of Electrical-Electronics Engineering University of Technical Education Ho Chi Minh City Vietnam

This paper represented Autoregressive Neural Network (ARNN) and meant threshold methods for recognizing eye movements for control of an electrical wheelchair using EEG technology. The eye movements such as eyes open, eyes blinks, glancing left and glancing right related to a few areas of human brain were investigated. A Hamming low pass filter was applied to remove noise and artifacts of the eye signals and to extract the frequency range of the measured signals. An autoregressive model was employed to produce coefficients containing features of the EEG eye signals. The coefficients obtained were inserted the input layer of a neural network model to classify the eye activities. In addition, a mean threshold algorithm was employed for classifying eye movements. Two methods were compared to find the better one for applying in the wheelchair control to follow users to reach the desired direction. Experimental results of controlling the wheelchair in the indoor environment illustrated the effectiveness of the proposed approaches.

关键词： Autoregressive NN Model Threshold algorithm EEG Technology Eye Activity and Electrical Wheelchair

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德诗高公的珠江三角洲市场营销计划研究

德诗高公的珠江三角洲市场营销计划研究

作者： thanh-Hue huynh（黄菁惠）华南理工大学

学位级别：硕士

市场营销计划,是用来帮助一间公司利用市场策略去实现其商业目标。本论文的主要目的是制定一个如何采取策略在中国的珠江三角洲推广“德诗高”休闲装和“德诗高”品牌形象的市场营销计划。外国时尚品牌在中国中产阶级消费群中正日渐受... 详细信息

市场营销计划,是用来帮助一间公司利用市场策略去实现其商业目标。本论文的主要目的是制定一个如何采取策略在中国的珠江三角洲推广“德诗高”休闲装和“德诗高”品牌形象的市场营销计划。外国时尚品牌在中国中产阶级消费群中正日渐受欢迎。随着中国经济持续稳步增长,越来越多的人可以依靠他们的高收入来购买时尚服装,它巨大的市场潜力正吸引全世界的主要时装品牌,可以制定最佳市场营销计划的公司也将有能力超越其他竞争对手并占取得在中国的良好市场份额。这份研究讨论了德诗高产品的市场,提出一些满足这一目标市场的策略,鉴识别出定出市场的主要参与者,提供给德诗高公司赢得竞争的具体措施。本文的研究方法应用了从市场研究报告、访谈和互联网时尚业文章中采集到的数据。理论框架参考了由不同的学者写的市场营销的概念。本市场营销计划的最终结论就是建议“德诗高”通过重点提升在香港的品牌声誉和品牌价值这两个渠道进入中国时尚市场,数字化的营销与广告策略将促进“德诗高”休闲装产品在中国的销售和增加“德诗高”在富裕的中国中产阶级消费层中的知名度,此外,本文还建议“德诗高”选择广州、深圳、珠海等沿海城市进入中国服装市场。

关键词：市场营销计划德诗高珠江三角洲中国时尚产业市场