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Optimum Design for the Magnification Mechanisms Employing Fuzzy Logic-ANFIS

Open Journal of Modern Hydrology（现代水文学期刊） 2023年第1期

作者： Misigo W.S.Angalika Seiji Suzuki Wataru Tanaka huynh v.vu Tomoaki Itayama

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Computers, Materials & Continua 2022年第12期73卷 5961-5983页

作者： Ngoc Thai huynh Tien v.T.Nguyen Quoc Manh Nguyen Faculty of Automobile Technology Industrial University of Ho Chi Minh CityHo Chi Minh City70000Vietnam Faculty of Mechanical Technology Industrial University of Ho Chi Minh CityHo Chi Minh City70000Vietnam Faculty of Mechanical Engineering Hung Yen University of Technology and EducationHung Yen160000Vietnam

To achieve high work performance for compliant mechanisms of motion scope,continuous work condition,and high frequency,we propose a new hybrid algorithm that could be applied to multi-objective optimum *** this investigation,we use the tools of finite element analysis(FEA)for a magnificationmechanism to find out the effects of design variables on the magnification ratio of the mechanism and then select an optimal mechanism that could meet design requirements.A poly-algorithm including the Grey-Taguchi method,fuzzy logic system,and adaptive neuro-fuzzy inference system(ANFIS)algorithm,was utilized mainly in this *** FEA outcomes indicated that design variables have significantly affected on magnification ratio of the mechanism and verified by analysis of variance and analysis of the signal to noise of grey relational *** results are also predicted by employing the tool of ANFIS in *** conclusion,the optimal findings obtained:Its magnification is larger than 40 times in comparison with the initial design,the maximum principal stress is 127.89MPa,and the first modal shape frequency obtained 397.45 ***,we found that the outcomes obtained deviation error compared with predicted results of displacement,stress,and frequency are 8.76%,3.6%,and 6.92%,respectively.

关键词： Compliant mechanism grey relational analysis taguchi method multi-objective optimization fuzzy logic system adaptive neuro-fuzzy inference system(ANFIS)

MODELING THE KNOWLEDGE CREATION PROCESS OF GRADUATE RESEARCH

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Journal of Systems Science and Systems Engineering 2018年第6期27卷 790-809页

作者： J. Sun J. Tian v.N. huynh Y. Nakamori School of Knowledge Science Japan Advanced lnstitute of Science and Technology lshikawa Japan School of Computer Science and Technology Wuhan University of Technology Wuhan China

Graduate students who are beginning academic research want to learn how to create and verify new knowledge in their research. Their supervisors, on the other hand, are seeking appropriate research environments including effective research guidance methods. In order to meet these demands, this paper proposes a knowledge creation model that supports the objectives of both graduate students and their supervisors. This is an academic knowledge creation model for individuals supported by a group and its origin can be traced back to a famous organizational knowledge creation model. Since this type of model is constructed from empirical knowledge, it is not easy to prove its objective significance. But, this paper tries to show the effectiveness of the proposed model as an initial stage of model validation based on a questionnaire survey of students in a graduate school in China.

关键词： Knowledge creation model graduate students research ability research environment

Minimizing Warpage for Macro-Size Fused Deposition Modeling Parts

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Computers, Materials & Continua 2021年第9期68卷 2913-2923页

作者： Thanh Thuong huynh Tien v.T.Nguyen Quoc Manh Nguyen Trieu Khoa Nguyen Department of Mechanical Engineering Can Tho UniversityCampus IICan ThoVietnam Faculty of Mechanical Technology Industrial University of Ho Chi Minh CityHo Chi Minh70000Vietnam Mechanical Engineering Department National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Faculty of Mechanical Engineering Hung Yen University of Technology and EducationHung Yen16000Vietnam

In this study,we investigated warpage and corner lifting minimization for three-dimensional printed parts generated by macro-size fused deposition modeling(FDM).First,the reasons for warpage were theoretically *** approach revealed that the thermal deformation and differential volumetric shrinkage of the extruded molten plastic resulted in warpage of FDM *** addition,low adhesion between the deposited model and the heated or non-heated printing bed may intensify warpage *** a next step,initial small-size and medium-size models were used to identify parameters to manage and minimize warpage in a way that would reduce material consumption and running ***,a macro-size model was built to experimentally investigate and verify the technical solutions to minimize the warpage of FDM *** conclusion,an improved part with reduced warpage was efficiently produced after detailed consideration of thermal effects and adhesion *** exists to widen the application scope of FDM technology in manufacturing for processes like thermoforming that involve mold core fabrication with *** technology,which has applications not only in mechanical engineering but also in related engineering fields,is convenient and could readily be applied to practical manufacturing industries.

关键词： Fused deposition modeling corner lifting volumetric shrinkage thermal deformation acrylonitrile butadiene styrene filament

A Framework to Regionalize Flow Information in a Catchment with Limited Hydrological Data

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Open Journal of Modern Hydrology 2023年第1期13卷 22-51页

作者： Misigo W. S. Angalika Seiji Suzuki Wataru Tanaka huynh v. vu Tomoaki Itayama Department of Advanced Engineering University Nagasaki University Nagasaki City Japan

This paper describes a framework for mapping flow information from a single gauge to the 9-ungauged river basins with distinct attributes. To establish the basic watershed characteristics at the gauged site, a hydrologic model was calibrated and validated against the historical continuous discharge dataset. The framework was then applied to account for the two watersheds’ proportionality in their similarity, such as the influence of land use on transplanting flow signatures to the ungauged site. Three land-use scenarios-discharges at the ungauged and gauged sites formed the basis of an equation mapping the gauged discharge signal to the ungauged site. In comparison with intermittent observed data, the framework prediction attained a precision of 0.85 ≥ NSE ≤ 0.95, 0.80 ≥ R2 ≤ 0.94, 0.56 ≥ bR2 ≤ 0.89. Despite considerable differences in the watershed area, slope, soils, and land cover, the framework satisfactorily depicted the variation in flow pulses at each of the 9 ungauged discharge sites. In the absence of sufficient hydrological information, for example, the presence of a single gauge, the framework provides an alternative method to estimate flow at ungauged sites, reducing uncertainties in the regionalization of model parameters.

关键词： Prediction Uncertainty Regionalization Mapping Transplanting Flow Signatures

Intermediary RRT*-PSO:A Multi-Directional Hybrid Fast Convergence Sampling-Based Path Planning Algorithm

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Computers, Materials & Continua 2023年第8期76卷 2281-2300页

作者： Loc Q.huynh Ly v.Tran Phuc N.K.Phan Zhiqiu Yu Son v.T.Dao School of Industrial Engineering and Management International UniversityVietnam National University HCMCHo Chi Minh City700000Vietnam Department of Industrial Management National Taiwan University of Science and TechnologyTaipei City106335Taiwan

Path planning is a prevalent process that helps mobile robots find the most efficient pathway from the starting position to the goal position to avoid collisions with *** this paper,we propose a novel path planning algorithm-Intermediary RRT*-PSO-by utilizing the exploring speed advantages of Rapidly exploring Random Trees and using its solution to feed to a metaheuristic-based optimizer,Particle swarm optimization(PSO),for fine-tuning and *** Phase 1,the start and goal trees are initialized at the starting and goal positions,respectively,and the intermediary tree is initialized at a random unexplored region of the search *** trees were grown until one met the other and then merged and re-initialized in other unexplored *** the start and goal trees merge,the first solution is found and passed through a minimization process to reduce unnecessary *** 2 begins by feeding the minimized solution from Phase 1 as the global best particle of PSO to optimize the *** simulating two special benchmark configurations and six practice configurations with special cases,the results of the study concluded that the proposed method is capable of handling small to large,simple to complex continuous environments,whereas it was very tedious for the previous method to achieve.

关键词： Motion planning global path planning rapidly exploring random trees particle swarm optimization

Low-Programmable-voltage Nonvolatile Memory Devices Based on Omega-shaped Gate Organic Ferroelectric P(vDF-TrFE) Field Effect Transistors Using p-type Silicon Nanowire Channels

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Nano-Micro Letters 2015年第1期7卷 35-41页

作者： Ngoc huynh van Jae-Hyun Lee Dongmok Whang Dae Joon Kang Department of Physics Institute of Basic SciencesSungkyunkwan University School of Advanced Materials Science and Engineering SKKU Advanced Institute of Nanotechnology Sungkyunkwan University

A facile approach was demonstrated for fabricating high-performance nonvolatile memory devices based on ferroelectric-gate field effect transistors using a p-type Si nanowire coated with omega-shaped gate organic ferroelectric poly(vinylidene fluoride-trifluoroethylene)(P(vDF-Tr FE)). We overcame the interfacial layer problem by incorporating P(vDF-Tr FE) as a ferroelectric gate using a low-temperature fabrication process. Our memory devices exhibited excellent memory characteristics with a low programming voltage of ±5 v, a large modulation in channel conductance between ON and OFF states exceeding 105, a long retention time greater than 3 9 104 s, and a high endurance of over 105 programming cycles while maintaining an ION/IOFFratio higher than 102.

关键词： Si nanowires Field effect transistor Ferroelectric memory

A FRAMEWORK OF FUZZY LANDSCAOE THEORY WITH AN APPLICATION TO ALLIANCE ANALYSIS

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Journal of Systems Science & Complexity 2003年第1期16卷 1-12页

作者： S. Suganuma v. N. huynh Y. Nakamori S. Y.Wang Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100080 China) K. K. Lai Japan Advanced Institute of Science and Technology Department of Computer Science University of Quinhon 170 - An Duong VuongJapan Advanced Institute of Science and Technology 1-1 Asahidai TatsunokuchiDepartment of Management Sciences City University of Hong Kong 1 - 1 Asahidai Tatsunokuchi Ishikawa 923-1292 Japan Academy of Mathematics and Systems Sciences Chinese Academy of SciencesBeijing 100080 ChinaQuinhon VietnamIshikawa 923-1292JapanKowloon Hong Kong

In this paper, we provide a framework of fuzzy landscape theory and discuss an application to alliance analysis. The fuzzy landscape theory may allow us to analyses a variety of aggregation processes in political, economic, and social problems in a more flexible manner. The simulation results for the problems of the international alignment of the Second World War in Europe and the coalition formation in standard-setting alliances in the case of the UNIX operating system are compared with those given by the original theory.

关键词： Fuzzy landscape theory alliance partition genetic algorithm.

Efficacy of He-Ne Laser in Combination with Topical Clindamycin in the Treatment of Acne vulgaris (Av)

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Journal of Cosmetics, Dermatological Sciences and Applications 2020年第3期10卷 134-139页

作者： Bui Thi van Nguyen Ngoc Oanh Đặng văn Em huynh Thi Xuan Tam Nguyen Lan Anh Pham Thi Minh Phuong Dermatology-venereology and Allergy 108 Central Military Hospital Hanoi Vietnam Dermatology-venereology Department Bach Mai Hospital Hanoi Vietnam Pham Ngoc Thach University of Medicine Ho Chi Minh City Vietnam

Objective: To evaluate the efficacy of He-Ne laser in combination with topical clindamycin in the treatment of Av at 108 Military Central Hospital from Oct 2015 to Aug 2016. Subjects and Methods: 61 patients with Av w... 详细信息

Objective: To evaluate the efficacy of He-Ne laser in combination with topical clindamycin in the treatment of AV at 108 Military Central Hospital from Oct 2015 to Aug 2016. Subjects and Methods: 61 patients with AV were divided into 2 groups: Group 1: 31 patients were treated with He-Ne laser in combination with topical Clindamycin, Group 2: 30 patients were only treated with topical clindamycin. Laser HE-NE was applied 2 times/week for 6 weeks. Result: After 3 months of treatment Group 1: very good—51.6%, good—48.4%. Group 2: very good—30%, good—50% and moderate—20%. Conclusion: The combination of He-Ne laser with topical clindamycin shows more rapid clinical improvement compared to topical clindamycin alone in the treatment of mild and moderate AV.

关键词： Acne vulgaris He-Ne Laser Clindamycin

68Ga-PSMA-PET/CT与18F-氟化物-PET/CT和全身MRI相比,用于检测前列腺癌病人的骨转移:前瞻性诊断准确性研究

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国际医学放射学杂志 2019年第3期 368-369页

作者：梁聪聪 E.Dyrberg H.Hendel T.huynh T.Klausen v.LФgager C.Madsen Department of Radiology Copenhagen University Hospital Herlevand Gentofte

摘要目的研究Ga-PSMA-PET/CT与F-氟化物-PET/CT和全身MRI用于检测前列腺癌病人骨转移的诊断准确性。方法对2016年5月—2017年6月期间的60例前列

关键词：前列腺癌 PET/CT 诊断准确性骨转移氟化物 CT MRI