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Dynamic response of honeycomb-FGS shells subjected to the dynamic loading using non-polynomial higher-order IGA

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Defence Technology（防务技术） 2024年第7期37卷 149-161页

作者： Pham Binh Le trung-thanh Tran Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoiViet Nam

The main goal of this study is to use higher-order isogeometric analysis(IGA)to study the dynamic response of sandwich shells with an auxetic honeycomb core and two different functionally graded materials(FGM)skin layers(namely honeycomb-FGS shells)subjected to dynamic ***'s non-polynomial higher-order shear deformation theory(HSDT)is used due to its simplicity and *** governing equation is derived from Hamilton's *** verifying the present approach,the effect of input parameters on the dynamic response of honeycomb-FGS shells is carried out in detail.

关键词： IGA Elastic foundation Dynamic response FGM Auxetic honeycomb Shell

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甘蔗与抗旱性相关差异蛋白质组分析

作物学报 2017年第9期43卷 1337-1346页

作者： do thanh-trung 李健张风娟杨丽涛李杨瑞邢永秀广西大学农学院/亚热带农业生物资源保护与利用国家重点实验室广西南宁530005 广西农业科学院/中国农业科学院甘蔗研究中心/农业部广西甘蔗生物技术与遗传改良重点实验室/广西甘蔗遗传改良重点实验室广西南宁530007

采用桶栽方式,对抗旱性强的F172和抗旱性弱的YL6甘蔗品种在苗期进行重度干旱胁迫处理后,应用蛋白质双向电泳技术进行差异蛋白质分析,分别找出差异显著的28和20个差异蛋白点,其中部分呈现上调表达,部分呈现下调表达,还有部分新增的蛋白点... 详细信息

采用桶栽方式,对抗旱性强的F172和抗旱性弱的YL6甘蔗品种在苗期进行重度干旱胁迫处理后,应用蛋白质双向电泳技术进行差异蛋白质分析,分别找出差异显著的28和20个差异蛋白点,其中部分呈现上调表达,部分呈现下调表达,还有部分新增的蛋白点,因品种抗性不同而表现各异,F172叶片中的差异蛋白主要表现为上调表达,而YL6中大多表现为下调表达。在重度干旱胁迫下,抗旱性不同的甘蔗品种蛋白质丰度变化有显著差异。采用MALDI-TOF-TOF/MS鉴定所获得的差异蛋白,从YL6、F172中分别鉴定出18、14个蛋白的氨基酸序列,对所鉴定的蛋白质根据功能分为8类。YL6中参与自由基清除的2个,参与光合作用的6个,参与细胞生长和分裂的1个,参与基础代谢的6个,参与防卫反应的2个,未知功能蛋白1个。F172中参与自由基清除的1个,参与光合作用的2个,参与细胞生长和分裂的2个,参与基础代谢的4个,参与信号转导的2个,参与蛋白加工的1个,未知功能蛋白2个,其中22 k D干旱诱导蛋白的丰度明显提高,而在YL6中则检测不到此蛋白。这说明在干旱胁迫下抗旱性不同的甘蔗品种在蛋白质组成上有很大差异,推测这是不同甘蔗品种间抗旱性差异的重要分子基础。

关键词：甘蔗水分胁迫蛋白质组差异表达抗旱性

干旱胁迫下不同甘蔗品种叶片抗氧化酶活性和渗透调节物质含量的变化

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热带作物学报 2018年第5期39卷 858-866页

作者： do thanh trung 李健张风娟邢永秀杨丽涛李杨瑞 Nguyen Thi Hanh 广西大学农学院/亚热带农业生物资源保护与利用国家重点实验室广西南宁530005 广西农业科学院/中国农业科学院甘蔗研究中心/农业部广西甘蔗生物技术与遗传改良重点实验室/广西甘蔗遗传改良重点实验室广西南宁530007

我国80%以上的甘蔗种植在旱地,干旱缺水是影响甘蔗生产的主要因子。研究不同甘蔗品种的抗旱生理生化特性对于抗旱甘蔗品种选育和抗旱栽培技术研发具有重要意义。本研究采用桶栽方式,对抗旱性有差异的F172(抗旱性强)和YL6(不抗旱)2个甘... 详细信息

我国80%以上的甘蔗种植在旱地,干旱缺水是影响甘蔗生产的主要因子。研究不同甘蔗品种的抗旱生理生化特性对于抗旱甘蔗品种选育和抗旱栽培技术研发具有重要意义。本研究采用桶栽方式,对抗旱性有差异的F172(抗旱性强)和YL6(不抗旱)2个甘蔗品种在苗期及伸长期分别进行不同程度的干旱胁迫及复水处理,探讨了不同甘蔗品种抗旱性与叶片抗氧化酶活性和渗透调节物质含量的关系。结果表明:抗旱性较强的甘蔗品种F172在干旱胁迫条件下叶片中氧自由基清除酶系中的超氧化物歧化酶(SOD)、过氧化物酶(POD)和抗氧化保护酶过氧化氢酶(CAT)活性及非可溶性蛋白(ISP)、可溶性糖(SS)含量显著提高;与不抗旱甘蔗品种YL6相比,甘蔗品种F172叶片中丙二醛(MDA)、非可溶性糖(ISS)含量相对比较稳定;而不抗旱甘蔗品种YL6在干旱胁迫条件下叶片中氧自由基清除酶反应较迟钝,MDA和ISS含量上升幅度相对较大,而可溶性蛋白(SP)、ISP含量下降。说明甘蔗叶片抗氧化酶活性和渗透调节物质含量的差异是品种耐干旱胁迫存在差异的生理基础。

关键词：甘蔗干旱胁迫氧化酶渗透调节物质

Predicting 3D Radiotherapy dose-Volume Based on Deep Learning

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Intelligent Automation & Soft Computing 2024年第2期39卷 319-335页

作者： do Nang Toan Lam thanh Hien Ha Manh Toan Nguyen Trong Vinh Pham trung Hieu Institute of Information Technology Vietnam Academy of Science and TechnologyHanoi10072Vietnam Faculty of Information Technology Lac Hong UniversityBien HoaDong Nai76120Vietnam

Cancer is one of the most dangerous diseaseswith *** of the principal treatments is radiotherapy by using radiation beams to destroy cancer cells and this workflow requires a lot of experience and skill from doctors and *** our study,we focused on the 3D dose prediction problem in radiotherapy by applying the deeplearning approach to computed tomography(CT)images of cancer *** image data has more complex characteristics than normal image data,and this research aims to explore the effectiveness of data preprocessing and augmentation in the context of the 3D dose prediction *** proposed four strategies to clarify our hypothesis in different aspects of applying data preprocessing and *** strategies,we trained our custom convolutional neural network model which has a structure inspired by the U-net,and residual blocks were also applied to the *** output of the network is added with a rectified linear unit(Re-Lu)function for each pixel to ensure there are no negative values,which are absurd with radiation *** experiments were conducted on the dataset of the Open Knowledge-Based Planning Challenge which was collected from head and neck cancer patients treatedwith radiation *** results of four strategies showthat our hypothesis is rational by evaluating metrics in terms of the dose-score and the dose-volume histogram score(DVH-score).In the best training cases,the dose-score is 3.08 and the DVH-score is *** addition,we also conducted a comparison with the results of another study in the same context of using the loss function.

关键词： CT image 3D dose prediction data preprocessing augmentation

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夏黑葡萄在越南北部栽培表现及其技术要点

南方园艺 2019年第6期30卷 34-37页

作者：黄江流 do thanh trung 唐其展吕荣华 NGUYEN TUAN DIEP CAN VAN TOAN NGUYEN CONG thanh PHUNG DUY HIEU BUI THI THU TRANG 黄竟刘淑仪黄芳颖梁芳黄勇策黄克顺广西农业科学院葡萄与葡萄酒研究所广西南宁530007 越南北江农林科技大学越南广西农业科学院国际合作处广西南宁530007 广西无为谷生态农业科技有限公司广西南宁530008

河内、北江等越南北方地区年均温比广西南宁高2℃左右,光温条件比较优越,应越方要求新引入种植比巨峰葡萄早熟优质的无核夏黑葡萄,以期调节产期,满足市场需求。采用广西夏黑葡萄当年种当年收和一年两收栽培技术管理,在越南北部地区于3... 详细信息

河内、北江等越南北方地区年均温比广西南宁高2℃左右,光温条件比较优越,应越方要求新引入种植比巨峰葡萄早熟优质的无核夏黑葡萄,以期调节产期,满足市场需求。采用广西夏黑葡萄当年种当年收和一年两收栽培技术管理,在越南北部地区于3月上旬种植夏黑葡萄,种后4个半月于7月下旬修剪促花,剪后1个月于8月下旬开花,剪后2个月于9日下旬着色,剪后3个月于10月中下旬成熟上市,从种到收获全程9个月,平均每hm^2产量8517.0 kg,实现了当年种植当年投产的目标。为越南葡萄产业增加新的经济增长点。

关键词：夏黑葡萄当年种当年投产栽培表现技术要点

Static and free vibration analyses of functionally graded porous variable-thickness plates using an edge-based smoothed finite element method

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Defence Technology（防务技术） 2021年第3期17卷 971-986页

作者： trung thanh Tran Quoc-Hoa Pham trung Nguyen-Thoi Department of Mechanics Le Quy Don Technical UniversityHanoiViet Nam Division of Computational Mathematics and Engineering Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityViet Nam

The main purpose of this paper is to present numerical results of static bending and free vibration of functionally graded porous(FGP) variable-thickness plates by using an edge-based smoothed finite element method(ES-FEM) associate with the mixed interpolation of tensorial components technique for the three-node triangular element(MITC3), so-called ES-MITC3. This ES-MITC3 element is performed to eliminate the shear locking problem and to enhance the accuracy of the existing MITC3 element. In the ES-MITC3 element, the stiffness matrices are obtained by using the strain smoothing technique over the smoothing domains formed by two adjacent MITC3 triangular elements sharing an edge. Materials of the plate are FGP with a power-law index(k) and maximum porosity distributions(U) in the forms of cosine functions. The influences of some geometric parameters, material properties on static bending, and natural frequency of the FGP variable-thickness plates are examined in detail.

关键词： Functionally graded porous(FGP)plates Edge-based smoothed finite element method(ES-FEM) Mixed interpolation of tensorial components(MITC) Static bending Free vibration

Transfer Learning for Disease Diagnosis from Myocardial Perfusion SPECT Imaging

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Computers, Materials & Continua 2022年第12期73卷 5925-5941页

作者： Phung Nhu Hai Nguyen Chi thanh Nguyen thanh trung Tran trung Kien Institute of Information Technology AMSTHanoi11307Vietnam Department of Medical Equipment 108 Military Central HospitalHanoi11610Vietnam

Coronary artery disease(CAD)is one of the most common pathological conditions and the major global cause of *** perfusion imaging(MPI)using single-photon emission computed tomography(SPECT)is a non-invasive method and plays an essential role in diagnosing ***,there is currently a shortage of doctors who can diagnose using SPECT-MPI in developing countries,especially *** on deploying machine learning and deep learning in supporting CAD diagnosis has been noticed for a long ***,these methods require a large dataset and are therefore time-consuming and *** study aims to develop a cost-effective and high-performance CAD classification model to support doctors in these *** this paper,we propose a transfer learning framework for a multi-stage training process with different learning *** process consists of two training stages:a warming up stage in which all layers of a pre-trained model(on ImageNet dataset)are frozen;and a finetuning stage in which a small amount of the top layers are unfrozen and then retrained with a lower learning *** dataset for this study consists of the polar maps from 218 *** popular CNN-based pre-trained models have been investigated,and ResNet152V2-based model has obtained the highest performances with an accuracy of 95.5%,area under the receiver operating characteristic curve(AUC)score 0.932,sensitivity 94.4%,precision 96.4%,and F1-score 95.2%.These performances are competitive or even better than all state-of-the-art approaches in terms of classification accuracy and *** also apply the class activation mapping technique to help explain the model’s predictions and increase the model’s reliability,proving capable of assisting the SPECT image readers in the CAD diagnosis.

关键词： Coronary artery disease deep learning transfer learning SPECTMPI polar maps

A novel finite element formulation for static bending analysis of functionally graded porous sandwich plates

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Frontiers of Structural and Civil Engineering 2022年第12期16卷 1599-1620页

作者： Van Chinh NGUYEN trung thanh TRAN trung NGUYEN-THOI Quoc-Hoa PHAM Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoiVietnam Laboratory for Applied and Industrial Mathematics Institute for Computational Science and Artificial IntelligenceVan Lang UniversityHo Chi Minh CityVietnam Faculty of Mechanical-Electrical and Computer Engineering Van Lang UniversityHo Chi Minh CityVietnam Faculty of Engineering and Technology Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam

This article aims to propose a finite element formulation based on Quasi-3D theory for the static bending analysis of functionally graded porous(FGP)sandwich *** FGP sandwich plates consist of three layers including the bottom skin of homogeneous metal,the top skin of fully ceramic and the FGP core layer with uneven porosity distribution.A quadrilateral(Q4)element with nine degrees of freedom(doFs)per node is derived and employed in analyzing the static bending response of the plate under uniform and/or sinusoidally distributed *** accuracy of the present finite element formulation is verified by comparing the obtained numerical results with the published results in the ***,some numerical examples are performed to examine the effects of the parameters including power-law index k and porosity coefficient on the static bending response of rectangular FGP sandwich *** addition,a problem with a complicated L-shape model is conducted to illustrate the superiority of the proposed finite element method.

关键词： sandwich plates functionally graded porous static bending Quasi-3D theory Q4 element

Marketing Strategies Evaluation and Selection for Supply Chain Management Under Uncertainty

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Computers, Materials & Continua 2022年第12期73卷 6535-6546页

作者： Ngo Quang trung Nguyen Van thanh Faculty of Commerce Van Lang UniversityHo Chi Minh City70000Vietnam

Sustainable marketing,often known as green marketing,has grown in popularity over the last two *** is currently putting pressure to encourage firms to become environmentally aware in multiple aspects like human and financial utilization,advertisement,and product *** types of companies are including many environmental campaigns into their own products to take advantage of the *** many scholars have addressed the relevance of green marketing as well as theory development,this study is unique in that it examines both techniques in a fuzzy *** integrated Fuzzy Multicriteria Decision Making Model(MCDM)of the analytical hierarchy process(AHP)and a Portuguese-acronymous MCDM method(TODIM)are used to select the best marketing strategy from five alternatives:(i)Green Design,(ii)Green Positioning,(iii)Green Pricing,(v)Green Packaging,and(iv)Green *** on criteria such as the scale of the green market,price parity,and the commitment of top *** for evaluating green marketing strategies was established in the study as contributions for decisionmakers in this field under unclarified *** research also a useful guideline for ranking alternatives in others industry.

关键词： Green marketing MCDM model sustainable marketing strategy