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Investigation on cost-effective composites for CO_(2) adsorption from post-gasification residue and metal organic framework

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Journal of Environmental sciences 2025年第2期148卷 174-187页

作者： Hong Nam Nguyen Thu Phuong Nguyen Phuong Thu Le Quang Minh Tran Thi Hai Do Trung Dung Nguyen Phuong Lan Tran-Nguyen Toshiki Tsubota Thi Mai Thanh Dinh university of science and technology of hanoi Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoi 100000Vietnam Institute for Tropical technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoi 100000Vietnam Faculty of Basic science Hanoi University of Mining and Geology18 Pho VienDuc ThangNam Tu LiemHanoi 100000Vietnam Faculty of Physical and Chemical Engineering Le Quy Don Technical University236 Hoang Quoc VietBac Tu LiemHanoi 100000Vietnam Department of Mechanical Engineering Can Tho University3/2 streetCan Tho City 94000Vietnam Department of Engineering Graduate School of EngineeringKyushu Institute of Technology1-1 SensuichoTobata-kuKitakyushuFukuoka 804-8550Japan

Cost-effective CO_(2) adsorbents are gaining increasing attention as viable solutions for mitigating climate *** this study,composites were synthesized by electrochemically combining the post-gasification residue of Macadamia nut shell with copper benzene-1,3,5-tricarboxylate(CuBTC).Among the different composites synthesized,the ratio of 1:1 between biochar and CuBTC(B 1:1)demonstrated the highest CO_(2) adsorption *** controlled laboratory conditions(0°C,1 bar,without the influence of ambient moisture or CO_(2) diffusion limitations),B 1:1 achieved a CO_(2) adsorption capacity of 9.8 mmol/g,while under industrial-like conditions(25℃,1 bar,taking into account the impact of ambient moisture and CO_(2) diffusion limitations within a bed of adsorbent),it reached 6.2 mmol/*** values surpassed those reported for various advanced CO_(2) adsorbents investigated in previous *** superior performance of the B 1:1 composite can be attributed to the optimization of the number of active sites,porosity,and the preservation of the full physical and chemical surface properties of both ***,the composite exhibited a notable CO_(2)/N_(2) selectivity and improved stability under moisture *** favorable characteristics make B 1:1 a promising candidate for industrial applications.

关键词： Biochar-based composites CO_(2)adsorption CuBTC Metal organic framework Post-gasification residue

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High-thermal free vibration analysis of functionally graded microplates using a new finite element formulation based on TSDT and MSCT

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Defence technology(防务技术) 2025年第2期44卷 131-149页

作者： Huu Trong Dang Nhan Thinh hoang quoc Hoa Pham Trung Thanh Tran Huy Gia Luong Faculty of Mechanical Engineering technology Vinh Long University of Technology EducationVinh Long 91000Viet Nam Institute for Creative Design and Business Nguyen Tat Thanh UniversityHo Chi Minh City 70000Viet Nam Faculty of Engineering and technology Nguyen Tat Thanh UniversityHo Chi Minh City 70000Viet Nam Faculty of Mechanical Engineering Le Quy Don Technical UniversityHanoi 10000Viet Nam TechnoStar vietnam TechnoStar Co.LtdHo Chi Minh City 70000Viet Nam

Recent advancements in additive manufacturing(AM)have revolutionized the design and production of complex engineering *** these advancements,their mathematical modeling and computational analysis remain significant *** research aims to develop an effective computational method for analyzing the free vibration of functionally graded(FG)microplates under high temperatures while resting on a Pasternak foundation(PF).This formulation leverages a new thirdorder shear deformation theory(new TSDT)for improved accuracy without requiring shear correction ***,the modified couple stress theory(MCST)is incorporated to account for sizedependent effects in *** PF is characterized by two parameters including spring stiffness(k_(w))and shear layer stiffness(k_(s)).To validate the proposed method,the results obtained are compared with those of the existing ***,numerical examples explore the influence of various factors on the high-temperature free vibration of FG *** factors include the length scale parameter(l),geometric dimensions,material properties,and the presence of the elastic *** findings significantly enhance our comprehension of the free vibration of FG microplates in high thermal *** addition,the findings significantly enhance our comprehension of the free vibration of FG microplates in high thermal *** addition,the results of this research will have great potential in military and defense applications such as components of submarines,fighter aircraft,and missiles.

关键词： Microplates Functionally graded material Finite element method Modified couple stress theory New TSDT High-thermal free vibration Pasternak foundation

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Privacy-preserving explainable AI: a survey

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science China(Information sciences) 2025年第1期68卷 23-56页

作者： Thanh Tam NGUYEN Thanh Trung HUYNH Zhao REN Thanh Toan NGUYEN Phi Le NGUYEN Hongzhi YIN quoc viet Hung NGUYEN School of Information and Communication technology Griffith University School of Computer and Communication sciences Ecole Polytechnique Federale de Lausanne Faculty of Mathematics and Computer science University of Bremen Faculty of Information technology HUTECH University Department of Computer science Hanoi University of Science and Technology School of Electrical Engineering and Computer science The University of Queensland

As the adoption of explainable AI(XAI) continues to expand, the urgency to address its privacy implications intensifies. Despite a growing corpus of research in AI privacy and explainability, there is little attention on privacy-preserving model explanations. This article presents the first thorough survey about privacy attacks on model explanations and their countermeasures. Our contribution to this field comprises a thorough analysis of research papers with a connected taxonomy that facilitates the categorization of privacy attacks and countermeasures based on the targeted explanations. This work also includes an initial investigation into the causes of privacy leaks. Finally, we discuss unresolved issues and prospective research directions uncovered in our analysis. This survey aims to be a valuable resource for the research community and offers clear insights for those new to this domain. To support ongoing research, we have established an online resource repository, which will be continuously updated with new and relevant findings.

关键词： privacy-preserving explainable AI privacy attacks privacy defences PrivEx PPXAI

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Electrochemical Immunosensor for Detection of Atrazine Based on Polyaniline/Graphene

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Journal of Materials science & technology 2016年第6期32卷 539-544页

作者： Nguyen Van Chu Nguyen Hai Binh Cao Thi Thanh Nguyen Van Tu Nguyen Le Huy Nguyen Tuan Dzung Phan Ngoc Minh Vu Thi Thu Tran Dai Lam Institute of Materials science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau Giay.HanoiViet Nam School of Chemical Engineering.hanoi university of science and technology 1 Dai Co VietHanoiViet Ham Institute for Tropical technology.vietnam Academy of science and technology 18 Hoang Quoc VietHanoiViet Nam Center for High technology Development Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoiViet Nam university of science and technology of hanoi.18 hoang quoc viet HanoiViet Ham Graduate university of science and technology.vietnam Academy of science and technology 18 Hoang Quoc Viet.HanoiViet Nam

In this study, a novel layer-by-layer polyaniline/graphene （PANi/Gr） structure for electrochemical detec- tion of atrazine was developed. Gr film was synthesized by thermal chemical vapor deposition （CVD） method and transferred onto the PANi-predeposited microelectrode. The properties of PANi/Gr film were thoroughly investigated by high-resolution transmission electron microscopy and Raman techniques. The most attractive feature of this system is a suitable microenvironment, which could provide an amplifi- cation of the conductive signal, thus may contribute to enhancing electron transfer and subsequently improve the sensitivity in electrochemical measurements. With low detection limit （- 43 × 10 -12 g/L）, ac-ceptable stability and good reproducibility, the proposed electrochemical immunosensor could be advantageously extended for multiplexed detection of other agents of environmental pollution.

关键词： Electrochemical immunosensor Polyaniline Graphene Atrazine

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Antibiofilm activity of alpha-mangostin loaded nanoparticles against Streptococcus mutans

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Asian Pacific Journal of Tropical Biomedicine 2020年第7期10卷 325-332页

作者： Phuong T.M.Nguyen Minh T.H.Nguyen Lien T.Quach Phuong T.M.Nguyen Lam L.Nguyen Dong V.Quyen Institute of Biotechnology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiVietnam Institute of Graduate university of science and technology Vietnam Academy of Science and Technology18 Hoang Quoc Viet RoadHanoiVietnam university of science and technology of hanoi Vietnam Academy of Science and Technology18-Hoang Quoc Viet RoadCau GiayHanoiVietnam

Objective:To investigate the antibiofilm activity of alphamangostin(AMG)loaded nanoparticle(nano AMG)against dental caries pathogen Streptococcus ***:AMG was isolated from the peels of Garcinia mangostana *** silica gel columns and chemically analysed by high performance liquid chromatography and nuclear magnetic *** AMG was prepared using the solvent evaporation method combined with high-speed *** nanoparticles were characterized using dynamic light scattering,field emission scanning electron microscopy(FE-SEM)and Fourier transform infrared spectroscopy(FTIR).The toxicity of nano AMG in fibroblast NIH/3 T3 cell line was determined using MTT *** antibiofilm effect of nano AMG was determined through the evaluation of biofilm formation by Streptococcus mutans using a 96-well *** biomass was quantified using crystal *** viability was observed under confocal microscopy using LIVE/DEAD Bac Light ***,gene expression was determined by quantitative real-time PCR and membrane permeabilization activity by measuring the uptake of o-nitrophenol-β-***:Nano AMG size was in a range of 10-50 nm with a polydispersity index of<0.3 and zeta potential value of-35.2 m *** size and the incorporation of AMG in the nanoparticles were confirmed by FE-SEM and FTIR *** IC50 values of the test agents on NIH/3 T3 cells were(9.80±0.63)μg/m L for AMG and(8.70±0.81)μg/m L for nano AMG,while no toxicity was generated from excipients used to prepare *** the early stage of biofilm formation,treatment with 6.25μmol/L nano AMG caused a reduction in biofilm biomass up to 49.1%,compared to 33.4%for *** contrast,biofilms at the late stage were more resistant to the test *** 96μmol/L(=10×MIC),nano AMG reduced only 20.7%of biofilm biomass while AMG did not showany *** of gtf B and gtf C genes involved in biofilm formation were down-regulated 3.3 and 12.5 folds,res

关键词： Alpha-mangostin Nanoparticle Antibiofilm activity Streptococcus mutans

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Synthesis and characterization of NaYF4:Yb3+,Er3+@silica-N=folic acid nanocomplex for bioimaginable detecting MCF-7 breast cancer cells

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Journal of Rare Earths 2019年第11期37卷 1183-1187页

作者： Ha Thi Phuong Tran Thu Huong Le Thi Vinh hoang Thi Khuyen Do Thi Thao Nguyen Thanh Huong Pham Thi Lien Le quoc Minh Institute of Materials science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduate university of science and technology-vietnam Academy of science and technology 18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry Hanoi Medical University1-Ton That TungDong DaHanoiViet Nam Department of Chemistry Hanoi University of Mining and Geology18-Pho LienBac Tu LiemHanoiViet Nam Institute of Biotechnology Vietnam Academy of Science and Technology18-Hoang Quoc VietCau GiayHanoiViet Nam Duy Tan university K7/25 Quang TrungDa NangViet Nam

Upconversion nanophosphors are new promising nanomaterials to be used as biolabels for detection and imaging of cancer *** nanophosphors absorb long-wavelength excitation radiation in the infrared or near infrared region and emit shorter wavelength,higher energy radiation from ultraviolet to *** this paper,we studied the hydrothermal method and optical properties of the functionalized NaYF4:Yb^3+,Er^3+for biomedical *** synthesis,these NaYF4:Yb^3+,Er^3+nanophosphors were functionalized with aminosilanes and folic *** acid binds to the folate receptor on the surface of MCF-7 breast cancer cells and this binding promotes internalization of the nanophosphors via *** sizes of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA(folic acid)nanophosphors can be controlled with length of the rod about 300-800 nm and diameter of the rod about 100-200 *** structure of NaYF4:Yb^3+,Er^3+is in hexagonal crystal *** photo luminescence(PL)spectra of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA nanophosphors were *** nanophosphors emit in red color with the strongest band at 650 nm under 980 nm *** result can provide NaYF4:Er^3+,Yb^3+@silica-N=FA complex for developing fluorescence label and image tool in cancer biology and medicine.

关键词： Upconversion luminescence NaYF4:Yb^3+,Er^3+ Nanophosphors Bioimaging Cancer cell Rare earths

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Zirconium metal organic framework for design of tetragonal rare earth-doped zirconia nanoparticles

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Journal of Rare Earths 2019年第11期37卷 1230-1236页

作者： Lam Thi Kieu Giang Lukasz Marciniak Krzysztof Kamil Zur Dinh Manh Tien Nguyen Vu Nguyen Thanh Binh Tran Kim Anh Le quoc Minh Institute of Materials science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduate university of science and technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Institute of Low Temperature and Structural Research Polish Academy of Sciencesul.Okolna 250-422 WroclawPoland Faculty of Mechanical Engineering Bialystok University of TechnologyWiejska 45C15-351 BialystokPoland Institute of Applied Physics and Scientific Instrument Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Duy Tan university 03 Quang TrungDa NangViet Nam

Zirconium metal-organic frameworks ZrOBDC(where BDC=C6H4(COOH)2,terephthalic acid)doped and co-doped with rare earth ions Ln(ZrOBDC:Ln^3+,where Ln^3+=Eu3+and Tb^3+as well as Er^3+and Yb^3+)were used as precursors for the design of tetragonal rare earth doped zirconia nanoparticles(t-ZrO2:Ln^3+NPs)through annealing ***,characterization and luminescence properties of ZrOBDC:Ln^3+and ZrO2:Ln^3+NPs were *** as-obtained t-ZrO2:Ln^3+NPs have high purity with an average size of 20-30 *** luminescence spectra of ZrOBDC:Tb^3+and ZrOBDC:Eu3+display strong green and red emission at around 544 and 611 nm which correspond to 5D4→7F5 and 5D0→7F2 transitions of Tb^3+and Eu3+ions,*** green and red up-conversion emissions of ZrO2:Er^3+,Yb^3+NPs due to 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of the Er^3+ions are observed under 976 nm laser excitation.

关键词： Zirconium Rare earth ZrOBDC ZrOBDC:Ln3+ ZrO2:Ln3+ Up-conversion

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Finite element analysis of functionally graded sandwich plates with porosity via a new hyperbolic shear deformation theory

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Defence technology（防务技术） 2022年第3期18卷 490-508页

作者： Pham Van Vinh Le Quang Huy Department of Solid Mechanics Le Quy Don Technical University236 Hoang Quoc VietHanoiViet Nam Institute of Techniques for Special Engineering Le Quy Don Technical University236 Hoang Quoc VietHanoiViet Nam

This study focusses on establishing the finite element model based on a new hyperbolic sheareformation theory to investigate the static bending,free vibration,and buckling of the functionally graded sandwich plates with *** novel sandwich plate consists of one homogenous ceramic core and two different functionally graded face sheets which can be widely applied in many fields of engineering and defence *** discrete governing equations of motion are carried out via Hamilton’s principle and finite element *** computation program is coded in MATLAB software and used to study the mechanical behavior of the functionally graded sandwich plate with *** present finite element algorithm can be employed to study the plates with arbitrary shape and boundary *** obtained results are compared with available results in the literature to confirm the reliability of the present ***,a comprehensive investigation of the effects of several parameters on the bending,free vibration,and buckling response of functionally graded sandwich plates is *** numerical results shows that the distribution of porosity plays significant role on the mechanical behavior of the functionally graded sandwich plates。

关键词： Functionally graded sandwich plates Porous plates Hyperbolic shear deformation theory Bending analysis Free vibration analysis Buckling analysis

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KD-SegNet: Efficient Semantic Segmentation Network with Knowledge Distillation Based on Monocular Camera

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Computers, Materials & Continua 2025年第2期82卷 2001-2026页

作者： Thai-viet Dang Nhu-Nghia Bui Phan Xuan Tan School of Mechanical Engieering Hanoi University of Science and TechnologyHanoi10000Vietnam College of Engineering Shibaura Institute of TechnologyTokyo135-8548Japan

Due to the necessity for lightweight and efficient network models, deploying semantic segmentation models on mobile robots (MRs) is a formidable task. The fundamental limitation of the problem lies in the training performance, the ability to effectively exploit the dataset, and the ability to adapt to complex environments when deploying the model. By utilizing the knowledge distillation techniques, the article strives to overcome the above challenges with the inheritance of the advantages of both the teacher model and the student model. More precisely, the ResNet152-PSP-Net model’s characteristics are utilized to train the ResNet18-PSP-Net model. Pyramid pooling blocks are utilized to decode multi-scale feature maps, creating a complete semantic map inference. The student model not only preserves the strong segmentation performance from the teacher model but also improves the inference speed of the prediction results. The proposed method exhibits a clear advantage over conventional convolutional neural network (CNN) models, as evident from the conducted experiments. Furthermore, the proposed model also shows remarkable improvement in processing speed when compared with light-weight models such as MobileNetV2 and EfficientNet based on latency and throughput parameters. The proposed KD-SegNet model obtains an accuracy of 96.3% and a mIoU (mean Intersection over Union) of 77%, outperforming the performance of existing models by more than 15% on the same training dataset. The suggested method has an average training time that is only 0.51 times less than same field models, while still achieving comparable segmentation performance. Hence, the semantic segmentation frames are collected, forming the motion trajectory for the system in the environment. Overall, this architecture shows great promise for the development of knowledge-based systems for MR’s navigation.

关键词： Mobile robot navigation semantic segmentation knowledge distillation pyramid scene parsing fully convolutional networks

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Luminescent and magnetic properties of multifunctional europium(Ⅲ) complex based nanocomposite

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Journal of Rare Earths 2019年第11期37卷 1237-1241页

作者： hoang Thi Khuyen Nguyen Thanh Huong Tran Thu Huong Pham Thi Lien Do Thi Anh Thu Nguyen Thi Anh Huong Wieslaw Strek Le quoc Minh Institute of Materials science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau CiayHanoiViet Nam Graduate university of science and technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry University of Natural SciencesHanoi National University19 Le Thanh TongHoan KiemHanoiViet Nam Institute of Low Temperature and Structure Research PASOkolna 2Wroclaw 50-422Poland Duy Tan university K7/25 Quang TrungDa DangViet Nam

The luminescent rare earth(RE)complex based multifunctional nanocomposites offer new potential applications of multimodal imaging(magnetic resonance imaging(MRI),fluorescent bioimaging,etc.)that can be associated with therapeutic *** this study,we report some results obtained with novel multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites that are composed of europium(Ⅲ)complex with 1-(2-naphthoyl)-3,3,3-trifluoroacetone ligands(NTA)(Eu(NTA)3)and superparamagnetic Fe3O4 *** nanocomposites were functionalized with an amine group for biomedicine *** multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites exhibit both good magnetic behavior of Fe3O4 nanoparticles as a core and strong fluorescent property of europium(Ⅲ)*** characterizations were analyzed by XRD,SEM,EDX and FTIR *** optical properties were studied in detail by UV-VIS spectra and luminescent emission *** magnetic property was estimated by *** effect of concentrations of luminescent Eu(NTA)3 complex on luminescent and magnetic properties is discussed.

关键词： Multifunctional nanocomposite Luminescence Magnetic Europium(Ⅲ)complex Fe3O4 Rare earths

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