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软木塞基碳量子点的水热合成及其生物相融荧光成像应用

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新型炭材料 2022年第3期37卷 595-602页

作者： quang Ngo Khoa Hieu Nguyen Ngoc Bao Vo Van Quoc Phuoc Vo Thi Ngoc Le Xuan Diem Doc Luong quang Tri Nguyen Minh Son Le Vu Truong Son Le Van thanh Ha Che Thi Cam University of Sciences Hue University77 Nguyen HueHueVietnam Faculty of Environmental and Natural Sciences Duy Tan UniversityDa Nang550000Vietnam Institute for Research and Training in Medicine Biology and PharmacyDuy Tan UniversityDa Nang550000Vietnam University of Agriculture and Forestry Hue University102 Phung HungHueVietnam University of Science and Education The University of Da Nang459 Ton Duc ThangLien ChieuDa NangVietnam

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。... 详细信息

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。用硫酸奎宁作为参考,碳量子点的量子效率为1.54%。将获得的碳量子点应用在骨髓间充质干细胞的细胞生物成像上,发现用碳量子点处理后,骨髓间充质干细胞分别在320~380 nm、450~490 nm和450~490 nm范围显示绿色、黄色和红色荧光,表明了碳量子点在荧光成像领域具有潜在的应用价值。

关键词：碳点水热合成荧光荧光图像废酒瓶塞

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An Enhanced Ensemble-Based Long Short-Term Memory Approach for Traffic Volume Prediction

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Computers, Materials & Continua 2024年第3期78卷 3585-3602页

作者： Duy quang Tran Huy Q.Tran Minh Van Nguyen Faculty of Civil Engineering Nha Trang UniversityNha Trang650000Vietnam Robotics and Mechatronics Research Group Faculty of Engineering and TechnologyNguyen Tat Thanh UniversityHo Chi Minh City700000Vietnam Department of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh City700000Vietnam

With the advancement of artificial intelligence,traffic forecasting is gaining more and more interest in optimizing route planning and enhancing service *** volume is an influential parameter for planning and operating traffic *** study proposed an improved ensemble-based deep learning method to solve traffic volume prediction problems.A set of optimal hyperparameters is also applied for the suggested approach to improve the performance of the learning *** fusion of these methodologies aims to harness ensemble empirical mode decomposition’s capacity to discern complex traffic patterns and long short-term memory’s proficiency in learning temporal ***,a dataset for automatic vehicle identification is obtained and utilized in the preprocessing stage of the ensemble empirical mode decomposition *** second aspect involves predicting traffic volume using the long short-term memory ***,the study employs a trial-and-error approach to select a set of optimal hyperparameters,including the lookback window,the number of neurons in the hidden layers,and the gradient descent ***,the fusion of the obtained results leads to a final traffic volume *** experimental results show that the proposed method outperforms other benchmarks regarding various evaluation measures,including mean absolute error,root mean squared error,mean absolute percentage error,and *** achieved R-squared value reaches an impressive 98%,while the other evaluation indices surpass the *** findings highlight the accuracy of traffic pattern ***,this offers promising prospects for enhancing transportation management systems and urban infrastructure planning.

关键词： Ensemble empirical mode decomposition traffic volume prediction long short-term memory optimal hyperparameters deep learning

Adaptability Zoning for Salty-Tolerant Rice Varieties in Soc Trang Prefecture by Using GIS and Remote Sensing

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Journal of Geological Resource and Engineering 2016年第3期4卷 142-150页

作者： Tran thanh Dan Tran Thi Ngoc Trinh Vo quang Minh Huynh Ngoc Van Department of Land Resources College of the Environment and Natural Resources Can Tho University Viet Nam Department of Science and Technology Graduate School of Engineering Nagasaki University Japan Center of Seed and Plant Soc Trang province Viet Nam

Soc Trang is one of coastal provinces in which rice land is relatively low and therefore under annual threat of saline intrusion and other climatic variabilities. It raises an urgent need to identify various rice varieties which are short-duration, highly adaptive to salinity penetration, floods and aluminium poisonous matters, as well as high productivity and quality. The research applies the GIS （Geo-Information System） and RS （Remote Sensing） techniques to accurately evaluate the adaptability of different salinity-tolerant rice varieties. We have used information from FAO （The Food and Agriculture Organization）, Maplnfo and ArcGIS to map different components separately that are overlapped and mixed together to build different maps indicating the adaptability of different rice varieties to salinity in different locations in Soc Trang. We have also identified various factors affecting the productivity of these rice varieties. Then, several salinity-resistent rice varieties have been piloted in different areas to figure out which varieties are most suitable for specific regions.

关键词： Adaptability salty-tolerant rice climate change remote sensing GIS.

基于循环稳定特性的空时分组码MC-CDMA信号盲识别算法

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系统工程与电子技术 2015年第7期37卷 1650-1657页

作者：裴光盅张天骐高超重庆邮电大学信号与信息处理重庆市重点实验室重庆400065

空时码应用最广泛的是空时分组码(space-time block code,STBC)和垂直分层空时码(vertical bell layered space-time code,VBLAST),因为STBC信号具有时间上的相关特性,所以在求高阶循环累积量时,该信号有一个特殊的循环频率,而VBLAST信... 详细信息

空时码应用最广泛的是空时分组码(space-time block code,STBC)和垂直分层空时码(vertical bell layered space-time code,VBLAST),因为STBC信号具有时间上的相关特性,所以在求高阶循环累积量时,该信号有一个特殊的循环频率,而VBLAST信号没有此特性。提出了一种基于循环稳定特性的STBC多载波码分多址(multicarrier code division multiple access,MC-CDMA)信号识别算法。该方法先根据信号系统的基带物理结构和信号模型来建立信号相关函数的选择标准,然后估计出这些相关函数对应的四阶累积量,接着把四阶循环累积量跟信道的参数结合起来建立一个循环统计量,最后把这个循环统计量与检测门限进行比较,实现信号识别。计算机模拟仿真表明,该算法能在较低的输入信噪比条件下良好地工作。

关键词：空时分组码多载波码分多址循环累积量判决反馈最大期望

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The impact of plasmonic Ag−Au bimetallic nanoparticles on photocurrent enhancement in GaN-based photodetectors

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Journal of Semiconductors 2024年第12期45卷 72-78页

作者： Thi Kim Oanh Vu Thi Thu Phuong bui Ngoc Anh Nguyen Thi thanh Bao Nguyen Thi Minh Hien Nguyen Eun Kyu Kim No.10 Dao Tan Institute of PhysicsVietnam Academy of Science and TechnologyNo.10 Dao TanHanoi 118000Vietnam Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoi 122300Vietnam Department of Physics and Research Institute for Natural Sciences Hanyang UniversitySeoul 04763Republic of Korea

Recently,there has been considerable interest in high-efficiency ultraviolet(UV)photodetectors for their potential practical *** this study,a high-quality UV photodetector was fabricated using a combination of Ag and Au NPs with GaN *** GaN film was deposited using sputtering technique,whereas Ag and Au films were grown using thermal evaporation ***-Au bimetallic nanoparticles were formed by treating them at the various annealing temperature to improve the interaction between light and the photoactive layers of the *** optimal annealing temperature to achieve the best performance of a photodetector is 650℃.This led to a photoresponsivity of 98.5 A/W and the ON/OFF ratio of 705 at low bias voltage of 1 *** work establishes the foundation for the advancement of high-performance UV photodetectors.

关键词： UV photodetectors GaN Ag-Au bimetallic nanoparticles plasmonic effect

Adaptive Controller Design for Dynamic Maneuvers of High Speed Underwater Vehicles

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China Ocean Engineering 2022年第2期36卷 311-321页

作者： bui Duc Hong PHUC Sam-Sang YOU Phuc Thinh DOAN Sang-Do LEE Department of Mechanical Engineering The University of TulsaTulsaOK 74104USA Division of Mechanical Engineering Korea Maritime and Ocean UniversityBusan 49112Republic of Korea Institute of Interdisciplinary Social Sciences Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam Division of Navigation and Information System Mokpo National Maritime UniversityMokpoJeollanam-do 58628Republic of Korea

The control synthesis of the high-speed underwater vehicle faces many technical challenges due to its inherent structure and surrounding operational *** this paper,the dynamical behavior is firstly described through a bifurcation analysis to give some insights for robust control *** a novel adaptive fractional-order sliding mode controller(AFOSMC)is realized to effectively manipulate the supercavitating vehicle against payload changes,nonlinear planing force,and external *** fractional order(FO)calculus can offer more flexibility and more freedom for tuning active control synthesis than the integer-order *** addition,the adaptation law has been presented to directly handle the payload change *** stability of the controlled vehicle system is proven via Lyapunov stability ***,the dynamic performance of the proposed controller is verified through extensive simulation results,which demonstrate the control accuracy with faster responses compared with existing integer-order ***,the proposed fractional order controllers can provide higher performance than their integer order counterparts with control algorithms.

关键词： fractional order calculus supercavitating underwater vehicles planing force payload change adaptive sliding mode control

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In vivo anticancer activity of maesopsin 4—O— β—glucoside isolated from leaves of Artocarpus tonkinensis *** Gagnep

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 343-348页

作者： Trinh Thi Thuy Dao Duc Thien Tran quang Hung Nguyen thanh Tam Nguyen Thi Hoang Anh Nguyen Thi Nga Nguyen Thi Cuc Le Phuong Mai Tran Van Sung Domenico V.Delfino Do Thi Thao Institute of Chemistry.Vietnam Academy of Science and Technology Institute of Biotechnology Vietnam Academy of Science and Technology National Research Council Canada Measurement Science and Standards1200 Montreal RoadBuilding M-12.Ottatca.Ontario KIA OR6 Department of Medicine University of PerugiaPiazzale Gambuli.S.Andrea delle Fratte

Objective:To investigate the antitumor effect of maesopsin 4-O-β-glucoside(TAT2) isolated from the leaves of Artocarpus tonkinensis(***) *** ***:The antitumor activity of TAT2 was evaluated in Lewis lung carcinoma(LLC) tumor-bearing ***/c mice had tumors induced by implantation with 2× 10~6 LLC cells into the subcutaneous right posterior ***-bearing mice were treated orally with a range of doses of TAT2 and a standard drug,*** were observed for tumor growth and mortality *** was collected to determine hematological and biochemical *** TAT2 was isolated from an ethanolic extract of *** *** structure was determined by MS and NMR spectroscopy,and identified as *** compound did not show acute toxicity at the highest dose tested(2 OIK) mg/kg body weight).TAT2 exhibited antitumor activity by decreasing tumor growth,increasing the survival rale,and ameliorating some hematological and biochemical parameters at doses of 100 and 200 mg/kg body weight(P<0.05).Conclusions:These results indicate that TAT2 possesses clear antitumor *** to its bioavailability and low toxicity,and the fact that it could be isolated in a large scale from *** leaves,the compound shows promise as a potential anticancer drug.

关键词： Artocarpus tonkinensis BALB/c Hematological parameters Lewis lung carcinoma Maesopsin 4-0-β-glucoside

OSTBC MC-CDMA上行链路基带信号盲处理

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OSTBC MC-CDMA上行链路基带信号盲处理

作者：裴光盅（bui quang Chung）重庆邮电大学

学位级别：硕士

多载波码分多址(Multi-carrier Code Division Multiple Access, MC-CDMA)技术是由正交频分复用(Orthogonal Frequency Division Multiplexing, OFDM)技术跟码分多址(Code Division Multiple Access, CDMA)技术结合起来形成的一个5G备选方案之一。MC-CDMA不仅保留了OFDM和CDMA的许多优势，而且弥补了各自的不足之处。空时编码技术的主要思想就是将天线发送分集的关键技术跟信道编码技术和调制技术有机地结合起来，所以空时编码在衰落信道的传输效果要好得多。如果将空时编码和MC-CDMA结合起来成一个空时分组码多载波码分多址(Space-time Block Coding Multi-carrier Code Division Multiple Access, STBCMC-CDMA)的新系统，可以使一个宽带MC-CDMA系统获得发射分集，并且有效地解决信道衰落、提高通信系统的可靠性等问题。STBC MC-CDMA信号处理包括信号峰值平均功率比(峰均比)抑制预处理、信号参数估计、信号识别等方面。在高速率、低信噪比与恶劣环境下对其进行处理，将对下一代无线通信系统的传输与接收处理产生重大的意义。高峰均比信号往往会超出系统功率放大器的线性范围，功率的利用率很差，导致系统性能的降低。另一方面，在多输入多输出(Multiple-input Multiple-output, MIMO)系统中，空时编码类型识别对接收端的信号解码、信号检测与后处理阶段十分重要。本文针对线性正交空时分组码多载波码分多址(Orthogonal STBC MC-CDMA,OSTBC MC-CDMA)的峰均比抑制和信号识别两个问题进行研究。本论文具体工作如下：1.介绍了OSTBC MC-CDMA信号模型与该信号的主要特性。2.针对MC-CDMA系统峰均比的问题，提出了利用改进的动态星座扩展(ActiveConstellation Extension, ACE)与粒子群优化(Particle Swam Optimization, PSO)相结合的算法来抑制该信号峰均比。该算法先利用改进ACE算法对信号进行处理，在处理过程当中，利用PSO算法寻找最优试探切峰门限，即各个子载波的峰均比分别作为试探切峰门限，迭代搜索得到让系统峰均比最小的最佳试探切峰门限，即满足预先设置的峰均指标。3.针对STBC MC-CDMA信号盲识别的问题，提出了一种利用循环稳定特性来实现STBC与垂直分层空时码(Vertical Belllayered Space-time Code, VBLAST)信号识别的算法。该法先建立了信号相关函数的选择标准，接着估计出来这些相关函数对应的四阶累积量，然后把四阶循环累积量跟信道的参数结合起来去建立一个循环统计量，最后根据循环频率的检测提取检测门限跟这个循环统计量进行比较做判决实现识别。4.针对OSTBCMC-CDMA类型盲识别的问题，提出一种基于鲁棒竞争聚类的实正交空时分组码盲识别算法。算法先建模得到了与虚拟信道矩阵相关的接收信号模型，然后利用鲁棒竞争聚类算法估计出虚拟信道矩阵，再者根据实正交空时分组码的特性，提出虚拟信道矩阵的相关矩阵的稀疏度和非主对角元素能量与主对角元素能量之比的能量比的识别特征参数，最后利用此参数判决码型。

关键词：正交空时分组码多载波码分多址峰值平均功率比鲁棒竞争聚类四阶循环累积量

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越南杧果产业发展趋势预测与启示

中国南方果树 2024年第4期53卷 251-258,264页

作者：邓志新 VU thanh Hai 刘洋铭 PHAM quang Thang 西南林业大学绿色发展研究院昆明650224 越南国立农业大学越南河内云南机电职业技术学院昆明650201 越南有机农业工艺研究院越南河内

近年来,中国已成为越南杧果出口主要目标市场。本文以越南杧果产业为研究对象,运用“全程质量支撑技术体系”理论,分析其杧果产业发展现状及关键技术约束集,预测越南杧果产业发展趋势,推测其对中国杧果产业近期、中期、长期的影响,提出... 详细信息

近年来,中国已成为越南杧果出口主要目标市场。本文以越南杧果产业为研究对象,运用“全程质量支撑技术体系”理论,分析其杧果产业发展现状及关键技术约束集,预测越南杧果产业发展趋势,推测其对中国杧果产业近期、中期、长期的影响,提出我国应对策略建议,助力我国杧果产业发展。

关键词：越南杧果产业全程质量支撑技术体系中国大青杧

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