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钢渣对水溶液中砷的吸附动力学和热力学特性试验

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净水技术 2015年第2期34卷 83-89页

作者：杨长明陈氏秋张沈烁同济大学环境科学与工程学院长江水环境教育部重点实验室上海200092

以炼钢厂固体废弃物钢渣为材料，通过批量平衡吸附法，并结合宏观热力学和动力模型应用，分析和研究了钢渣对水溶As（III）的吸附特征。结果表明钢渣在吸附As（III）过程中，初始阶段吸附量迅速增加，随着浓度的增加，吸附逐渐趋于饱和... 详细信息

以炼钢厂固体废弃物钢渣为材料，通过批量平衡吸附法，并结合宏观热力学和动力模型应用，分析和研究了钢渣对水溶As（III）的吸附特征。结果表明钢渣在吸附As（III）过程中，初始阶段吸附量迅速增加，随着浓度的增加，吸附逐渐趋于饱和，最后达到平衡，具有“快速吸附、缓慢平衡”的特点。钢渣吸附材料具有极高的最大吸附容量，高达3．58×10^4mg／kg。钢渣对As（III）的吸附均符合Langmuir和Freundlich吸附等温线，其中钢渣对As（III）的吸附特征与Freundlich等温吸附方程吻合性最好，相关系数（R^2）达到0．99以上。钢渣对As（III）的吸附动力学数据均符合一级动力学方程、Elovich方程和双常数方程，拟合优度用相关系数（R^2）为0．92～0．98，相比较而言，钢渣对As（III）的吸附以Elovich方程为最佳模型。

关键词：钢渣三价砷去除吸附动力学热力学过程

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Deep learning long short-term memory combined with discrete element method for porosity prediction in gravel-bed rivers

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International Journal of Sediment Research 2023年第1期38卷 128-140页

作者： Duong tran Anh Ahad Hasan Tanim Daniel Prakash Kushwaha Quoc Bao Pham Van Hieu Bui HUTECH University Center for River Harbor and Landslide Research Chittagong University of Engineering & Technology Govind Ballabh Pant University of Agriculture and Technology Institute of Applied Technology Thu Dau Mot University Faculty of Mechanical Engineering Thuyloi University

The porosity of gravel riverbed material often is an essential parameter to estimate the sediment transport rate, groundwater-river flow interaction, river ecosystem, and fluvial geomorphology. Current methods of porosity estimation are time-consuming in simulation. To evaluate the relation between porosity and grain size distribution(GSD), this study proposed a hybrid model of deep learning Long Short-Term Memory(LSTM) combined with the Discrete Element Method(DEM). The DEM is applied to model the packing pattern of gravel-bed structure and fine sediment infiltration processes in threedimensional(3D) space. The combined approaches for porosity calculation enable the porosity to be determined through real time images, fast labeling to be applied, and validation to be done. DEM outputs based on the porosity dataset were utilized to develop the deep learning LSTM model for predicting bed porosity based on the GSD. The simulation results validated with the experimental data then segregated into 800 cross sections along the vertical direction of gravel pack. Two DEM packing cases, i.e., clogging and penetration are tested to predict the porosity. The LSTM model performance measures for porosity estimation along the z-direction are the coefficient of determination(R~2), root mean squared error(RMSE), and mean absolute error(MAE) with values of 0.99, 0.01, and 0.01 respectively, which is better than the values obtained for the Clogging case which are 0.71, 0.14, and 0.03, respectively. The use of the LSTM in combination with the DEM model yields satisfactory results in a less complex gravel pack DEM setup, suggesting that it could be a viable alternative to minimize the simulation time and provide a robust tool for gravel riverbed porosity prediction. The simulated results showed that the hybrid model of the LSTM combined with the DEM is reliable and accurate in porosity prediction in gravel-bed river test samples.

关键词： Numerical modeling Discrete element method LSTM Bed porosity Gravel-bed river

High-dose methylprednisolone pulse therapy for the treatment of patients with severe COVID-19: Results from a prospective observational study

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Journal of Intensive Medicine 2022年第3期2卷 197-198页

作者： thinh N.Bui Hoang-Anh Ngo Nhat M.Huynh Nguyen-Huy Do-tran Lac Duy Le thu-Anh Nguyen COVID-19 Intensive Care Unit 2 Thu Duc City HospitalThu Duc CityHo Chi Minh CityTam Phu 721400Vietnam Woolcock Institute of Medical Research 298 Kim MaBa DinhHanoi 118000Vietnam Usher Institute Old Medical SchoolUniversity of EdinburghEdinburgh EH89AGUnited Kingdom School of Medicine Vietnam National UniversityDong HoaHo Chi Minh CityDi AnBinh Duong 590000Vietnam Sydney School of Medicine The Faculty of Medicine and HealthThe University of SydneyCamperdownNSW 2050Australia

To the Editor:Recent randomized controlled trials,as well as high-quality systematic reviews and meta-analyses,strongly support the use of corticosteroids in patients with coronavirus disease 2019(COVID-19)who require oxygen support.[1]The use of pulse cor-ticosteroid therapy has been reported in case series and studies,showing significant improvement in patients and a reduction in mortality rate.[2]In this letter,we report the mortality rate among patients with severe COVID-19 receiving pulse corticos-teroids with methylprednisolone(500 mg/day)for≥3 days and≥24 h before intubation(median duration of therapy:3 days)compared with standard of care.

关键词： patients mortality therapy

Determination of fuel burnup distribution of a research reactor based on measurements at subcritical conditions

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Nuclear Science and Techniques 2018年第12期29卷 30-38页

作者： Quang Binh Do Hoai-Nam tran Quang Huy Ngo Giang T. T. Phan Ho Chi Minh City University of Technology and Education 1 Vo Van Ngan Thu Duc HCMC Vietnam Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh city Vietnam

this paper presents the determination of the fuel burnup distribution of the Dalat nuclear research reactor(DNRR) using a method of measurements at subcritical conditions. The method is based on the assumption of linear dependence of the reactivity on the burnup of fuel bundles and the measurements at subcritical *** measurements were taken for seven selected fuel bundles in two different measuring sequences. The measured burnup values have also been compared with the calculations for verifying the method and the measurement procedure. The results obtained with the three detectors have a good agreement with each other with a discrepancy less than 1.0%. The errors of the measured burnup values are within 6%. Comparison between the calculated and measured burnup values shows that the discrepancy of the C/E ratio is within 9% compared to unity. The results indicate that the method of measurements at subcritical conditions could be well applied to determine the relative burnup distribution of the DNRR.

关键词：研究反应堆燃料分发测量过程验证方法方法论价值计算

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Zoning Marine Disposal for Dredged Material Management:A Case Study in Vietnam

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Sustainable Marine Structures 2019年第2期1卷 19-27页

作者： Do Gia Khanh Do thi thu Huong Vu Duy Vinh tran Dinh Lan Hai Phong Department of Science and Technology Institute of Marine Environment and Resources/VAST Graduate University of Science and Technology

The fast growth of Hai Phong ports in the two last decades requires not only their upgrading facilities but also expanding port area and dredging their shipping channels(existing and new ones)that generate a huge amount of unused dredged *** all existing dumping sites in sea waters and on land get over capacity,looking for new dumping sites in sea waters is an urgent *** study is to zone coastal waters of Hai Phong for suitable dumping sites meeting sustainable coastal ***-criteria overlay analysis on GIS platform was employed with the criteria of natural conditions,environment and socio-economics for zoning coastal waters of Hai *** criteria were detailed into eight subcriteria and then developed to eight GIS weighted thematic sub-layers of bottom depth,litho-hydrodynamics,ecosystems,distribution of benthos,distance to residential areas and tourist sites,distance to aquaculture area,distance to ecosystems and distance to conservation *** results show the highly suitable zone for dredged material dumping in South,South West Hai Phong at depth below 15m to the deeper *** of dredged materials in the zone would minimize impacts on the environment,ecology and socio-economics in surrounding waters and coastal areas.

关键词： MCOA Marine dumping Shipping channel Sustainable criteria Environmental impacts Hai Phong ports

Environmental Assessment of Coastal Sand Mining Using Proposed DPSIR Criteria:A Case of Hai Phong

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Sustainable Marine Structures 2023年第1期5卷 14-23页

作者： Do thi thu Huong Do Gia Khanh Nguyen Van Thao tran Dinh Lan Institute of Marine Environment and Resources Vietnam Academy of Science and TechnologyHai Phong180000Vietnam Hai Phong Department of Agriculture and Rural Development Hai Phong180000Vietnam Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoi100000Vietnam

The environmental impact of coastal sand mining activities in Hai Phong city was assessed using ten proposed sustainable criteria for socio-economic development,and ecological and environmental *** ten criteria were developed by the analysis of the Dynamics-Pressure-State-Impact-Response(DPSIR)framework,including one driver and pressure criterion(D and P),seven status and impact criteria(S and I),and two response criteria(R).Each criterion is quantified according to five specific evaluation criteria corresponding to the evaluation score from 1 to *** results of the ten criterion application for environmental impact assessment of coastal mining Hai Phong by weighting show that the areas with economic activities,benthic biodiversity,and coastal ecosystems are most negatively impacted(score 4/5 and 3.5/5).Other subjects suffer low to moderate impacts(score 1/5 to 3/5).The environmental impact of sand mining(2015-2020)is generally moderate(score ranging from 2/5 to 3/5).The set of adjusted criteria can be applied to similar activities in coastal provinces and cities in Vietnam.

关键词： Coastal area Marine ecosystems Environmental impact Vietnam

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水稻籽粒性状的SSR关联分析

中国水稻科学 2014年第3期28卷 243-257页

作者：陈氏秋江党小景刘强明赵凯铭王卉洪德林南京农业大学作物遗传与种质创新国家重点实验室江苏南京210095 越南顺华大学顺华农林业大学农学院江苏省泰州市红旗种业有限公司江苏泰州225311

用262个SSR标记对来自不同生态区的540份水稻品种的基因组变异进行扫描,分析该自然群体的遗传多样性、群体结构和连锁不平衡位点,并采用TASSEL软件的一般线性模型(GLM)方法进行标记与性状的关联分析。结果表明:1)该自然群体由7个亚群体... 详细信息

用262个SSR标记对来自不同生态区的540份水稻品种的基因组变异进行扫描,分析该自然群体的遗传多样性、群体结构和连锁不平衡位点,并采用TASSEL软件的一般线性模型(GLM)方法进行标记与性状的关联分析。结果表明:1)该自然群体由7个亚群体组成;每个亚群内,无论是共线SSR标记位点之间还是非共线SSR标记位点之间均存在一定程度的连锁不平衡。2)三年均检测到的与粒长显著相关的标记位点有45个,贡献率最高的是RM5849(52.86%),M3766-140是增加表型效应最大的等位变异,载体品种是农香25。与粒宽显著相关的位点有7个,贡献率最高的是RM17(63.61%),增加表型效应最大的等位变异是RM17-145和RM573-235,载体品种分别是宁粳恢338和早十日黄稻。与粒厚显著相关的位点有11个,贡献率最高的是RM276(25.44%),增加表型效应最大的等位变异是RM508-215和RM7288-205,载体品种都是红芒沙粳。与千粒重显著相关的位点有6个,贡献率最高的是RM17(32.17%),增加表型效应最大的等位变异是RM17-145,载体品种是宁粳恢338。预测了利用这些载体材料改良籽粒性状的潜在杂交亲本组合。

关键词：水稻籽粒性状 SSR 分子标记关联分析有利等位变异

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Enrichment of hydrogen in product gas from a pilot-scale rice husk updraft gasification system

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Carbon Resources Conversion 2022年第3期5卷 231-239页

作者： Phan Dinh Tuan Le Minh Quan Vo trang Nhi Hoang Minh Huong Le thi Kim Phung Daolun Feng Hochiminh City University of Natural Resources and Environment 236B Le Van Sy St.Tan Binh Dist.Ho Chi Minh City 70.000Viet Nam Applied Research Institute for Natural Resources Materialand Environment58/4 Tran Van Du St.Tan Binh Dist.Ho Chi Minh City 70.000Viet Nam Hochiminh City University of Technology 268 Ly Thuong Kiet St.Dist.10Ho Chi Minh City 70.000Viet Nam Vietnam National University-Ho Chi Minh(VNU-HCM) Linh Trung WardThu Duc CityHo Chi Minh CityViet Nam College of Marine Science and Engineering Shanghai Maritime UniversityShanghai 200135PR China

An updraft gasifier was employed to treat 3 kg of dried rice husk per batch with different types of gasifying agents such as air,steam/air,and air with dolomite catalyst addition at various operating *** H2 content,low heating value,and H2/CO ratio in syngas were compared to determine the most effective solution to enhance the H2 production from rice husk *** presence of dolomite in air gasification produced the highest H2 content in the product gas,up to 15.4 mol%,followed by 7.08 and 3.6 mol%when steam/air and air standalone were used as gasifying agents,*** higher low heating value of syngas 5.1 MJ/Nm3 was observed in catalytic air gasification compared to 3.6 MJ/Nm3 when steam was *** optimal operation condition was reported at an airflow rate of 3 m3/h and a catalyst mixing ratio of 15%.

关键词： Rice husk Enriched hydrogen syngas Dolomite Updraft gasifier

Fuzzy Feedback Control for Electro-Hydraulic Actuators

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Intelligent Automation & Soft Computing 2023年第5期36卷 2441-2456页

作者： Tan Nguyen Van Huy Q.tran Vinh Xuan Ha Cheolkeun Ha Phu Huynh Minh School of Engineering-Technology Thu Dau Mot UniversityThu Dau Mot City590000Vietnam Faculty of Engineering-Technology Nguyen Tat Thanh UniversityHo Chi Minh City754000Vietnam Hue Industrial College Hue City530000Vietnam Robotics and Mechatronics Lab University of UlsanUlsan City44610Korea

Electro-hydraulic actuators(EHA)have recently played a signiﬁcant role in modern industrial applications,especially in systems requiring extremely high *** can be explained by EHA’s ability to precisely control the position and force through advanced sensors and innovative control *** of the promising approaches to improve control accuracy for EHA systems is applying classical to modern control algorithms,in which the proportional–inte-gral–derivative(PID)algorithm,fuzzy logic controller,and a hybrid of these methods are popular *** this paper,we developed a novel version of the fuzzy control algorithm and linear feedback control method,namely fuzzy lin-ear feedback control,to improve the control *** achieve the highest performance,weﬁrst designed a mathematical EHA model based on the Matlab/Simulink software packages thanks to the selected parameters,which are similar to a real EHA ***,we respectively applied PID,fuzzy PID(FPID),and fuzzy linear feedback control(FLFC)before comparing them to have a full view of the outstanding advantages of the proposed *** simulation results showed that the proposed FLFC algorithm is approximately 99%and 77%super-ior in performance to the PID and feedback control algorithms,respectively.

关键词： Electro-hydraulic actuator fuzzy PID feedback control