检索结果-内蒙古大学图书馆

Advanced machining of miniature unmanned aircraft vehicle components using nanostructured cutting tools

Journal of Micromanufacturing 2020年第2期4卷 106 - 117页

作者： M. J. Jackson J. Burgess Michael Whitfield M. Whitt R. B. DaSilva M. B. DaSilva A. R. Machado R. Davis School of Interdisciplinary Studies College of Technology and Aviation Kansas State University Manhattan KS USA Center for Advanced Manufacturing Purdue University West Lafayette IN USA College of Engineering California State Polytechnic University San Luis-Obispo CA USA School of Mechanical Engineering Federal University of Uberlandia Av. João Naves de Ávila Uberlandia MG Brazil School of Mechanical Engineering Federal University of Uberlandia Av. João Naves de Ávila Uberlandia MG BrazilMechanical Engineering Graduate Program Pontifícia Universidade Católica do Paraná—PUC-PR Curitiba/PR Brazil Department of Mechanical Engineering National Institute of Technology Patna Patna Bihar India

The advanced machining of components used in miniature unmanned aircraft vehicles is the focus of this study. The finite element method (FEM) is used to predict forces and temperatures using cutting tool inserts with a thin nanostructured film of high integrity. Similarity models are used to validate the finite element results and to understand the influence of micromachining parameters on cutting temperatures generated when machining Al 380-0 alloy. The predicted results are compared to experimental forces and temperatures using a three-dimensional piezoelectric function dynamometer and a short-range infra-red wavelength thermal camera. Nanostructured thin layer coatings lower machining forces and temperatures, which are validated through FEM predictions and experimental observations. The experimental results suggest that increasing the cutting tool’s rake angle at higher depths of cut will reduce cutting temperatures, which are predicted using the similarity models for micromachining.

关键词： Unmanned aircraft machining advanced manufacturing aluminum alloys

来源：评论

学校读者我要写书评

暂无评论

Development of microcontroller trainer kit as a teaching aid for electronics course

引用

AIP Conference Proceedings 2024年第1期3115卷

作者： Adhan Efendi Armansyah Maria Mahardini Sakanti Ary Surjanto C. Bambang Dwi Kuncoro Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology No. 57 Section 2 Zhongshan Rd Taiping District Taichung City Taiwan Mechanical Engineering Study Program Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Jalan RS. Fatmawati Raya Pondok Labu Cilandak South Jakarta City Jakarta 12450 Indonesia Department of Refrigeration and Air Conditioning Engineering Politeknik Negeri Bandung Polban Jl. Gegerkalong Hilir Ciwaruga Kec. Parongpong Kabupaten Bandung Barat Jawa Barat 4001 Indonesia Department of Refrigeration Air Conditioning and Energy Engineering National Chin-Yi University of Technology No. 57 Section 2 Zhongshan Rd Taiping District Taichung City Taiwan

This research aims to develop educational and learning support facilities by developing teaching aids for instructors and practical training to enhance the capabilities of laboratories. The developed exercise materials will be used in the electronics laboratory activities to equip vocational students (Diploma 3 and Diploma 4) with practical skills and knowledge of applied electronics. Microcontroller-based teaching materials designed systematically and interactively developed to support the applied electronic system. As a result, the students learn quickly while installing and programming applied electronic hardware applications. There are exercise manuals for up to seven exercise competencies of electronics laboratory activities. Based on the evaluation results from the expert group member and the laboratory chairman, the developed teaching aids are convenient for electronics laboratory classes. Based on student responses using the developed teaching aids, 43% of students mentioned that the microcontroller teaching laboratory kit and hands-on instructions were interactive, easy to use, understandable, and practical, along with the required electronic instructions. They indicated that the material was presented continuously. Meanwhile, 64% of students report that the microcontroller teaching laboratory kit and hands-on instructions motivate, contribute to comprehension, provide convenience, and increase student attention in electronics laboratory activities.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Application of Emerging Innovations in Microbiome Science to Space Development and Settlement Systems 73

Application of Emerging Innovations in Microbiome Science to...

引用

73rd International Astronautical Congress, IAC 2022

作者： Nastasi, Nicholas Anderson, Matthew Z. Balasubrahmaniam, Neeraja Bope, Ashleigh Britt, Rodney D. Cochran, Samuel J. Gill, Samuel J. Hegarty, Bridget Lee, Jiyoung Stamps, Blake W. Stickney, Amanda Taylor, Christopher G. Tram, Nguyen K. Van Dusen, John Varaljay, Vanessa A. Weir, Mark H. Horack, John M. Oglesbee, Michael Sullivan, Matthew B. Dannemiller, Karen C. Department of Civil Environmental & Geodetic Engineering Ohio State University ColumbusOH United States Division of Environmental Health Sciences College of Public Health Ohio State University ColumbusOH United States Environmental Sciences Graduate Program Ohio State University ColumbusOH United States Department of Microbiology College of Arts and Sciences Ohio State University ColumbusOH United States Department of Microbial Infection and Immunity Ohio State University ColumbusOH United States Center for Perinatal Research The Abigail Wexner Research Institute Nationwide Children's Hospital Department of Pediatrics Ohio State University ColumbusOH United States Department of Civil and Environmental Engineering Case School of Engineering Case Western Reserve University ClevelandOH United States Department of Food Science and Technology Ohio State University ColumbusOH United States Infectious Diseases Institute Ohio State University ColumbusOH United States Soft Matter Materials Branch Materials and Manufacturing Directorate Air Force Research Laboratory Wright - Patterson AFBOH United States Department of Plant Pathology College of Food Agriculture and Environmental Science Ohio State University ColumbusOH United States Department of Anesthesiology & Pain Medicine Nationwide Children's Hospital ColumbusOH United States Airman Systems Directorate 711th Human Performance Wing Air Force Research Laboratory WPAFBOH United States Sustainability Institute Ohio State University ColumbusOH United States Department of Mechanical and Aerospace Engineering College of Engineering John Glenn College of Public Affairs Ohio State University ColumbusOH United States Department of Veterinary Biosciences College of Veterinary Medicine Ohio State University ColumbusOH United States Center of Microbiome Science Ohio State University ColumbusOH United States

Future human spaceflight beyond low-Earth orbit will bring substantial changes and new requirements to the development of fully sustainable, healthy indoor human environments across a range of gravitational, radiative, and thermal conditions. One key aspect is understanding (and potentially leveraging) microorganisms that must coexist with humans, plants, and animals in enclosed habitats (their microbiota or microbiomes). Modern, genome-resolved microbiome science provides an opportunity to better understand how we can utilize microbes to optimize space missions and protect human health and well-being long-term. Microorganisms will be critical to mission success due to their direct or indirect interactions with 1) humans, 2) other living systems (e.g., plant and animal life as a food source and for experimentation), and 3) the built environment. For example, the human gut microbiome is a complex community that has important implications for human health and performance that include mental health, nutrition intake, and immune system function. The health of plant microbiomes is also critical for sustainable, dependable, and nutritious food production. Humans, plants, and other living systems (e.g., animals used in experimentation) will also shed microbes into the built environment, which may impact human exposure, plant health, system integrity, and planetary protection from microbial contamination in both forward and reverse directions. Microbes from all three systems will interact, resulting in potentially important 'non-linear' system implications that must be understood for the overall long-term sustainability of hardware, crew, and other living systems. This paper discusses recent advances in technology that expand measurement capabilities to ultra-low-biomass samples and now allow for better understanding of microbial taxa, community structure and drivers, and functional capacity, which together will empower microbiome-optimized deep-space human exploration miss

关键词： Bacteria

来源：评论

学校读者我要写书评

暂无评论

A numerical investigation of high speed projectile impact on ceramic plates 15

A numerical investigation of high speed projectile impact on...

引用

15th International Bhurban Conference on Applied Sciences and technology, IBCAST 2018

作者： Ahmed, Haseeb Mubashar, Aamir Uddin, Emad Haq, S. Waheed Ul Computational Mechanics Group School of Mechanical and Manufacturing Engineering National University of Sciences and Technology IslamabadH-12 Pakistan Mechanical Engineering Program Middle East Technical University Northern Cyprus Campus Mersin Turkey

ISBN: (纸本)9781538635643

With the advancements in the warfare technology, there is a need to have an equal armour protection to help the law enforcement agencies. Since the experimentation is expensive and time consuming and involves various constraints, the finite element codes are an alternative that can predict the projectile impact phenomena. Silicon Carbide is a ceramic known to perform well against projectile penetration. This study is based on investigation of the behaviour of Silicon Carbide of varied thicknesses against a 12.7 mm AP tracer projectile using numerical simulations. © 2018 IEEE.

关键词： Silicon carbide

来源：评论

学校读者我要写书评

暂无评论

Towards realistic simulations of human cough: effect of droplet emission duration and spread angle

arXiv

引用

arXiv 2022年

作者： Li, Mogeng Chong, Kai Leong Ng, Chong Shen Bahl, Prateek de Silva, Charitha M. Verzicco, Roberto Doolan, Con MacIntyre, C. Raina Lohse, Detlef Physics of Fluids Group Max Planck Center for Complex Fluid Dynamics J. M. Burgers Center for Fluid Dynamics and MESA+ Research Institute Department of Science and Technology University of Twente Enschede7500AE Netherlands Max Planck Institute for Dynamics and Self-Organisation Göttingen37077 Germany Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering Science Shanghai University Shanghai200072 China School of Mechanical and Manufacturing Engineering UNSW Sydney KensingtonNSW2052 Australia Dipartimento di Ingegneria Industriale University of Rome 'Tor Vergata' Roma00133 Italy Gran Sasso Science Institute Viale F. Crispi L'Aquila7 67100 Italy Biosecurity Program The Kirby Institute UNSW Sydney KensingtonNSW2052 Australia College of Public Service & Community Solutions College of Health Solutions Arizona State University PhoenixAZ United States

Human respiratory events, such as coughing and sneezing, play an important role in the host-to-host airborne transmission of diseases. Thus, there has been a substantial effort in understanding these processes: various analytical or numerical models have been developed to describe them, but their validity has not been fully assessed due to the difficulty of a direct comparison with real human exhalations. In this study, we report a unique comparison between datasets that have both detailed measurements of a real human cough using spirometer and particle tracking velocimetry, and direct numerical simulation at similar conditions. By examining the experimental data, we find that the injection velocity at the mouth is not uni-directional. Instead, the droplets are injected into various directions, with their trajectories forming a cone shape in space. Furthermore, we find that the period of droplet emissions is much shorter than that of the cough: experimental results indicate that the droplets with an initial diameter 10µm are emitted within the first 0.05 s, whereas the cough duration is closer to 1 s. These two features (the spread in the direction of injection velocity and the short duration of droplet emission) are incorporated into our direct numerical simulation, leading to an improved agreement with the experimental measurements. Thus, to have accurate representations of human expulsions in respiratory models, it is imperative to include parametrisation of these two features. © 2022, CC BY.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

aflow++: a C++ framework for autonomous materials design

arXiv

引用

arXiv 2022年

作者： Oses, Corey Esters, Marco Hicks, David Divilov, Simon Eckert, Hagen Friedrich, Rico Mehl, Michael J. Smolyanyuk, Andriy Campilongo, Xiomara van de Walle, Axel Schroers, Jan Kusne, A. Gilad Takeuchi, Ichiro Zurek, Eva Nardelli, Marco Buongiorno Fornari, Marco Lederer, Yoav Levy, Ohad Toher, Cormac Curtarolo, Stefano Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Center for Autonomous Materials Design Duke University DurhamNC27708 United States LIFT American Lightweight Materials Manufacturing Innovation Institute DetroitMI48216 United States Institute of Ion Beam Physics and Materials Research Helmholtz-Zentrum Dresden-Rossendorf Dresden01328 Germany Theoretical Chemistry Technische Universität Dresden Dresden01062 Germany Institute of Solid State Physics Technische Universität Wien WienA-1040 Austria School of Engineering Brown University ProvidenceRI02912 United States Department of Mechanical Engineering and Materials Science Yale University New HavenCT06511 United States Materials Measurement Science Division National Institute of Standards and Technology GaithersburgMD20899 United States Department of Materials Science and Engineering University of Maryland College ParkMD20742 United States Department of Chemistry State University of New York at Buffalo BuffaloNY14260 United States Department of Physics Department of Chemistry University of North Texas DentonTX76203 United States Santa Fe Institute Santa FeNM87501 United States Department of Physics Science of Advanced Materials Program Central Michigan University Mount PleasantMI48859 United States Department of Physics NRCN P.O. Box 9001 Beer-Sheva84190 Israel Department of Materials Science and Engineering Department of Chemistry and Biochemistry University of Texas at Dallas RichardsonTX75080 United States

The realization of novel technological opportunities given by computational and autonomous materials design requires efficient and effective frameworks. For more than two decades, aflow++ (Automatic-Flow Framework for Materials Discovery) has provided an interconnected collection of algorithms and workflows to address this challenge. This article contains an overview of the software and some of its most heavily-used functionalities, including algorithmic details, standards, and examples. Key thrusts are highlighted: the calculation of structural, electronic, thermodynamic, and thermomechanical properties in addition to the modeling of complex materials, such as high-entropy ceramics and bulk metallic glasses. The aflow++ software prioritizes interoperability, minimizing the number of independent parameters and tolerances. It ensures consistency of results across property sets — facilitating machine learning studies. The software also features various validation schemes, offering real-time quality assurance for data generated in a high-throughput fashion. Altogether, these considerations contribute to the development of large and reliable materials databases that can ultimately deliver future materials systems. © 2022, CC BY.

关键词： Quality assurance

来源：评论

学校读者我要写书评

暂无评论

Erratum to ‘Effect of soft segment molecular weight on the microcellular foaming behavior of TPU using supercritical CO 2 ’ [J. Supercrit. Fluids, 160, 2020, 104816]

引用

The Journal of Supercritical Fluids 2021年 171卷

作者： Mohammadreza Nofar Bige Batı Emine Büşra Küçük Amirjalal Jalali Metallurgical & Materials Engineering Department Faculty of Chemical and Metallurgical Engineering Istanbul Technical University Maslak Istanbul 34469 Turkey Polymer Science and Technology Program Istanbul Technical University Maslak Istanbul 34469 Turkey Microcellular Plastics Manufacturing Laboratory Department of Mechanical and Industrial Engineering University of Toronto Toronto Ontario M5S 3G8 Canada

来源：评论

学校读者我要写书评

暂无评论

Multistage artificial aging optimization for tensile properties of Duralium using Response Surface Method (RSM)

Multistage artificial aging optimization for tensile propert...

引用

2018 International mechanical and Industrial engineering Conference, IMIEC 2018

作者： Puspitasari, Poppy Dewi Izzatus, Tsamroh Achyarsyah, Mochamad Bandanajaya, Beny Puspitasari, Dewi Department of Mechanical Engineering Faculty of Engineering State University of Malang Malang65145 Indonesia Center of Advanced Materials State University of Malang Malang65145 Indonesia Department of Mechanical Engineering Postgraduate Program State University of Malang Malang65145 Indonesia Department of Foundry Engineering Bandung Manufacturing Polytechnic Bandung40135 Indonesia Department of Mechanical Engineering University Technology Petronas Seri Iskandar Perak Darul Ridzuan32610 Malaysia

This study developing mathematical model to optimize heat treatment process to obtain the most significant parameter that affected tensile strength of duralium through multistage artificial aging. The process parameters in this study were temperature of aging, holding time of aging, and artificial aging process was conducted in double stages. The experiments were conducted according to central composite design matrix. The adequacy of developed model was analysed by analysis of variance (ANOVA). The optimum parameter of multistage artificial aging was obtained for maximum tensile strength of duralium. © The Authors, published by EDP Sciences, 2018.

关键词： Tensile strength

来源：评论

学校读者我要写书评

暂无评论

Air Jet Erosion Study on Stir Casted Metal Matrix Composite Aluminum-SiC

引用

IOP Conference Series: Materials Science and engineering 2019年第1期547卷

作者： M. Longalayuk C. Ruskandi B. H. Setiamarga Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institute of Technology Bandung. Foundry Technology Department Bandung Manufacturing Polytechnics.

For equipment that operates in high-speed abrasive media, erosion will be the major factor for its failure. Metal Matrix Composite (MMC) Aluminum-Silicon Carbide has been developed for improving the lifetime for such application. In this research, MMC Al-SiC has been made using Al-7075 scrap with 5%, 10%, and 15% SiC powder addition. This MMC was manufactured using stir casting technique with 1% Magnesium addition. Optical metallography has been done to know the SiC distribution homogeneity. Erosion resistance of the MMC was studied using Air Jet Erosion Test with Alumina powder as abrasives. The microstructural study showed that MMC Al-SiC has been successfully manufactured although the SiC particle distribution has not been fully homogeneous yet. Air Jet Erosion Testing revealed that the addition of 5% SiC powder was optimal in increasing its erosion resistance. The SiC addition from 10 to 15% did not improve its erosion resistance significantly.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optimization of manufacturing sustainability in the Ethiopian industries

引用

Procedia manufacturing 2018年 21卷 890-897页

作者： Melesse Workneh Wakjira Holm Altenbach Perumalla Janaki Ramulu Research Scholar under sandwich program student at Otto-von-Guericke- Universität Magdeburg Germany and Adama Science and Technology University Ethiopia Prof. Ing. habil. Holm Altenbach Otto-von-Guericke-Universität Magdeburg Germany Associate Professor Program of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Ethiopia

The aim of the present work is to provide better attentiveness to the industry management and to facilitate the implementation of manufacturing sustainability. A generic model aspect presents and investigates the correlation for descriptive survey validation of manufacturing sustainability. Which intends to investigate the correlation among benefits, drivers, barriers and triple bottom-lines. The results can provide executive awareness of the current complex relations and to the development of an implementation plan. Thereby it is possible to upgrade the level of a supply supply chain management, production, environmental efficiency and ground work. Furthermore it can lead to strengthen government policy as well as to the development of new manufacturing.

关键词： manufacturing Sustainability Sustainable development Synthesis Triple bottom-line Descriptive survey

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：