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A comparative study on kinetics and dynamics of two dump truck lifting mechanisms using MATLAB simscape

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 146-156页

作者： Thong Duc Hong Minh Quang Pham Son Cong Tran Lam Quang Tran Truong Thanh nguyen Faculty of Transportation Engineering Ho Chi Minh City University of Technology(HCMUT)Ho Chi Minh City 700000Vietnam Vietnam National University Ho Chi Minh City(VNU-HCM) Ho Chi Minh City 700000Vietnam Industrial Maintenance Training Center Ho Chi Minh City University of Technology(HCMUT)Ho Chi Minh City 700000Vietnam

In this paper,two lifting mechanism models with opposing placements,which use the same hydraulic hoist model and have the same angle of 50°,have been *** mechanical and hydraulic simulation models are established using MATLAB Simscape to analyze their kinetics and dynamics in the lifting and holding *** simulation findings are compared to the analytical calculation results in the steady state,and both methods show good *** the early lifting stage,Model 1 produces greater force and discharges goods in the container faster than Model ***,Model 2 reaches a higher force and ejects goods from the container cleaner than its counterpart at the end lifting *** established simulation models can consider the effects of dynamic loads due to inertial moments and forces generated during the system *** is crucial in studying,designing,and optimizing the structure of hydraulic-mechanical systems.

关键词： Dump truck Lifting mechanism Hydraulic MATLAB Simscape Kinetic dynamic analysis

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基于新员工胜任力的绩效考核方法

统计与管理 2016年第10期31卷 55-57页

作者： nguyen thai Hoc nguyen THO BON 东北大学工商管理学院

针对企业新入职员工的绩效考核问题,本文将员工的胜任力引入其中,提出了一种考虑新入职员工胜任力的绩效考核方法,该方法在保留企业已有的绩效考核方法的优点的同时,还能进一步适用于新入职员工的绩效考核,具有广泛的应用前景。

关键词：绩效考核胜任力综合评价

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越南友谊食品股份公司出口战略研究

越南友谊食品股份公司出口战略研究

作者：阮泰英（nguyen thai anh）广西民族大学

学位级别：硕士

越南友谊食品股份公司作为一家食品为主的企业,主要生产以糖果、饼干,坚果和烘焙为主的休闲食品,近年来开始逐渐出口海外市场,但是遇到了较大的问题。以此问题为出发点,基于越南友谊食品股份公司的基本情况,对其海外出口数据进行了分析... 详细信息

越南友谊食品股份公司作为一家食品为主的企业,主要生产以糖果、饼干,坚果和烘焙为主的休闲食品,近年来开始逐渐出口海外市场,但是遇到了较大的问题。以此问题为出发点,基于越南友谊食品股份公司的基本情况,对其海外出口数据进行了分析,发现越南友谊食品股份公司出口方面面临这较大的问题。即发现其问题主要有:战略混乱;产品单一,且同质化严重;地区分布不均衡;价格低廉,利润率低等主要问题。之后又使用PEST方法剖析了其面临的外部环境,并使用五力模型分析了其面临的行业情况,在此基础上进行了SWOT矩阵分析,发现其面临的主要机遇、威胁和其主要的优势和劣势。最后根据SWOT分析矩阵提出其应该采取差异化战略,并提出了其具体的产品、渠道、价格、营销等具体的措施,以及其相应的辅助措施。通过以上分析以期实现越南友谊食品股份公司休闲食品的海外市场良性发展。

关键词：友谊食品出口战略 PEST方法 SWOT矩阵差异化战略

越南学生“常常”“往往”习得偏误及教学对策研究

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越南学生“常常”“往往”习得偏误及教学对策研究

作者： nguyen THI LUU LY （阮氏琉璃）河北大学

学位级别：硕士

Thornthwaite moisture index and depth of suction change under current and future climate‒An Australian study

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1761-1775页

作者： Md Rajibul Karim Bikash Devkota Md Mizanur Rahman Hoang Bao Khoi nguyen UniSA STEM University of South AustraliaMawson Lakes CampusMawson LakesSouth Australia5095Australia

Climate change is one of the major global challenges and it can have a significant influence on the behaviour and resilience of geotechnical *** changes in moisture content in soil lead to effective stress changes and can be accompanied by significant volume changes in reactive/expansive *** volume change leads to ground movement and can exert additional stresses on structures founded on or within a shallow depth of such *** change is likely to amplify the ground movement potential and the associated problems are likely to *** effect of atmospheric boundary interaction on soil behaviour has often been correlated to Thornthwaite moisture index(TMI).In this study,the long-term weather data and anticipated future projections for various emission scenarios were used to generate a series of TMI maps for *** changes in TMI were then correlated to the depth of suction change(H s),an important input in ground movement *** all climate scenarios considered,reductions in TMI and increases in H s values were observed.A hypothetical design scenario of a footing on expansive soil under current and future climate is *** is observed that a design that might be considered adequate under the current climate scenario,may fail under future scenarios and accommodations should be made in the design for such events.

关键词： Climate change Future prediction Thornthwaite moisture index(TMI) Characteristic surface movement Infrastructure resilience

基于Delphi思想的改进型OWA/OWGA信息集结算子

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统计与管理 2016年第12期31卷 38-40页

作者： nguyen thai Hoc nguyen Tho Bon 宫诚举东北大学工商管理学院

针对群体评价中的指标信息集结问题,在分析已有关于OWA/OWGA信息集结算子不足的基础上,引入德尔菲法基本思想,综合考虑评价信息满意度因素,提出了一种改进型OWA/OWGA信息集结算子,并对指标信息不完整的情况进行讨论,旨在从理论层面上探... 详细信息

针对群体评价中的指标信息集结问题,在分析已有关于OWA/OWGA信息集结算子不足的基础上,引入德尔菲法基本思想,综合考虑评价信息满意度因素,提出了一种改进型OWA/OWGA信息集结算子,并对指标信息不完整的情况进行讨论,旨在从理论层面上探讨指标信息集结的方法。该方法不仅考虑评价需求者的意向,还在权重的设置中综合考虑评价者的经验信息和评价过程中的信息,以提高指标信息集结果的可接受程度。最后,通过与传统的OWA/OWGA算子比较,表明该方法具有提高信息集结结果质量的优点。

关键词：群体评价指标信息信息集结德尔菲法经验信息

Development of an experimental method for well-controlled blast induced traumatic limb fracture in rats

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Defence Technology（防务技术） 2024年第4期34卷 168-176页

作者： Luyang Xu Xiancheng Yu Clement DFavier Ibidumo Igah Thuy-Tien nguyen Warren Macdonald Anthony MJ.Bull Centre for Blast Injury Studies Imperial College LondonLondonUnited Kingdom Department of Bioengineering Imperial College LondonLondonUnited Kingdom Dyson School of Design Engineering Imperial College LondonLondonUnited Kingdom Department of Trauma and Orthopaedics Royal Free London National Health Service Foundation TrustLondonUnited Kingdom

Heterotopic ossification(HO)is a consequence of traumatic bone and tissue damage,which occurs in 65%of military casualties with blast-associated ***,the mechanisms behind blast-induced HO remain *** models are used to study blast-induced HO,but developing such models is challenging,particularly in how to use a pure blast wave(primary blast)to induce limb fracture that then requires an *** studies,including our recent study,have developed platforms to induce limb fractures in rats with blast loading or a mixture of blast and impact ***,these models are limited by the survivability of the animal and repeatability of the *** this study,we developed an improved platform,aiming to improve the animal's survivability and injury repeatability as well as focusing on primary blast *** platform exposed only one limb of the rat to a blast wave while providing proper protection to the rest of the rat's *** obtained very consistent fracture outcome in the tibia(location and pattern)in cadaveric rats with a large range of size and ***,the rats did not obviously move during the test,where movement is a potential cause of uncontrolled *** further conducted parametric studies by varying the features of the design of the *** factors,such as how the limb is fixed and how the cavity through which the limb is placed is sealed,significantly affect the resulting *** platform and test setups enable well-controlled limb fracture induced directly by pure blast wave,which is the fundamental step towards a complete in vivo animal model for blast-induced HO induced by primary blast alone,excluding secondary and tertiary blast *** addition,the platform design and the findings presented here,particularly regarding the proper protection of the animal,have implications for future studies investigating localized blast injuries,such as blast induced brain and lung injuries.

关键词： Blast injury Biomechanics Heterotopic ossification Limb fracture Blast wave Animal model

Visualizing the Spin & Radiation of the Extended Electron in Magnetic Field

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Journal of High Energy Physics, Gravitation and Cosmology 2024年第1期10卷 277-291页

作者： Hoa Van nguyen Retired Engineer and Amateur Researcher of Physics Toronto Canada

This article presents illustrations of an extended model of the electron to visualize how it spins and radiates in the external magnetic field. A time-varying magnetic field B produces a rotational induced electric field E which rotates (spins) the electron about its axis. In time-constant magnetic field: the electron radiates the cyclotron radiation. In time-varying magnetic field: synchrotron radiation is generated. The couplings between spin, acceleration and radiation will be discussed.

关键词： Spinning Forces Spin by Inertia Radiating Forces Photon or Static Electric Dipole Cloud of Photons Spin - Radiation Coupling

One-loop contributions for h→ℓℓγ and e−e+→hγ in the U(1)_(B−L) extension of the standard model

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Chinese Physics C 2024年第5期48卷 23-49页

作者： Tran Dzung Tri Thanh Huy nguyen Khiem Hong Phan Institute of Fundamental and Applied Sciences Duy Tan UniversityHo Chi Minh City 700000Vietnam Faculty of Natural Sciences Duy Tan UniversityDa Nang City 550000Vietnam VNUHCM-University of Science 227 Nguyen Van CuDistrict 5Ho Chi Minh CityVietnam

We present one-loop contributions for h→ℓℓγ with ℓ=νe,μ,τ,e,μ and e−e+→hγ in the U(1)_(B−L) extension of the standard model. In the phenomenological results, the signal strengths for h→ℓℓγ at the Large Hadron Collider and for e−e+→hγ at future lepton colliders are analyzed in the physical parameter space for both the vector and chiral B−L models. We found that the contributions from the neutral gauge boson Z′ to the signal strengths are rather small. Consequently, the effects will be difficult to probe at future colliders. However, the impacts of charged Higgs and CP-odd Higgs in the chiral B−L model on the signal strengths are significant and can be measured with the help of the initial polarization beams at future lepton colliders.

关键词： Higgs phenomenology one-loop Feynman integrals analytic methods for quantum field theory dimensional regularization future lepton colliders