Gotowe bibliografie tematyczne / Milling machinery

Gotowa bibliografia na temat „Milling machinery”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 28 lipca 2024

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Artykuły w czasopismach na temat "Milling machinery"

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Nedelcu, Dragoş Iulian, i Ionel Olaru. "Study of Cooling Parameters Using Fluid Jet in Milling Process Simulation". Applied Mechanics and Materials 371 (sierpień 2013): 524–28. http://dx.doi.org/10.4028/www.scientific.net/amm.371.524.

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Milling machines are important in machinery industry that requires an appropriate cooling is mandatory in the milling process. This paper is focused on the development of cooling system in order to simulate the action of cooling fluid on a plane plate processing. Furthermore, that study is important in milling process for the improvement of surface characteristic values regarding operability of the internal cooling supply and the implementation in milling process.
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Hu, Hao, Xiao Feng, Shi Qiu, Dan Yang, Zhong Kai Chen i Xiang Li Wang. "Dynamic Optimization Design of Sand Milling Collection Machinery Suspensions". Applied Mechanics and Materials 536-537 (kwiecień 2014): 1314–20. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1314.

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Sand milling collection machinery is a kind of large machinery to collect the surface soil containing ores. The suspension system of milling machines directly affects the ride comfort and driving safety for the operator; for this end, the design of suspension system has been optimized so as to satisfy the requirements of reliability and comfort by making the console and operator set at the maximum station and minimum absolute acceleration and the amplitude within the range. This paper first established a suspension system model of milling collection machines and set up the state equation of suspension system by applying Lagrange equation. On this basis, this paper conducted the optimized calculation encouraged bt the pavement with sine rule change and obtained an optimal suspension system parameters ki and ci.
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Xu, Kai, i Hiroyuki Sasahara. "Generation of Regularly Aligned Curved Surface Patches on Free-Form Surface for Patch Division Milling". Key Engineering Materials 523-524 (listopad 2012): 54–57. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.54.

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This study describes a new machining strategy to make regularly aligned cutter marks on free-form surface efficiently for increasing the added value of industrial product. While the free-form surface is divided into many small patch segments employing curved surface patch division milling technique which can substitute for the conventional method, thus avoiding the influence of the change in the curvature. And the patch segments will be machined by a spiral tool path respectively, so that regularly aligned cutter marks can be successfully formed on the curved surface patches by controlling cross-feed, feed speed per tooth, number of teeth and the length of the tool path. Comparing the machined surface and the simulation result, the cutter marks agree with it. If the surface is machined only by the ball end milling with a machining center, this method will be a very effective tool for the machinery industry.
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Cai, An Jiang, Yan Jun Guo, Shi Hong Guo i Ming Wei Ding. "The Construction of the Management System of CNC Milling Parameters". Applied Mechanics and Materials 220-223 (listopad 2012): 385–88. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.385.

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CNC Milling Process for the complex characteristics, in order to solve how to quickly and effectively to provide a reasonable and optimal machining parameters of CNC milling process for technologist. The paper takes horizontal machining center DMC60H as a test platform and technological data of shell aluminum alloy hydraulic aircraft engine parts as a study. the paper establish management system of CNC milling parameters which was suitable for machinery manufacturing enterprises. The results showed that: The established parameters of CNC milling system can be better management of various CNC milling technology to effectively manage information and improve the CNC milling process information efficiency, has certain promotion effect to the production of the numerical control milling processing and the development of the manufacturing enterprises.
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Rowe, James, Christopher Langrand i Roger Debuchy. "Case study of vibration in a mobile milling machine". Vibroengineering PROCEDIA 49 (18.05.2023): 30–37. http://dx.doi.org/10.21595/vp.2023.23362.

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Many industries rely on heavy-duty machinery such as cranes, pipelines, motors, which are subject to wear and tear. Milling of such parts using conventional machine tools presents many drawbacks and is impossible in some cases. In such situations, mobile machine tools can be used to machine directly on site. However, mobile machines are flexible, and are prone to detrimental vibrations during cutting operations. Vibrational stability in the surfacing process has been extensively studied in conventional milling. However, the focus of this article is an original study on a mobile milling machine used for on-site surfacing operations. An experimental investigation into the vibrational behavior of the machine is carried out and a sensorless method is used to detect the onset of chatter. Machine flexibility is discussed using a tool-point frequency response function and references from the literature. Milling operations are carried out over a range machining parameter to determine an experimental stability limit. Internal sensors for spindle motor consumption and spindle motor encoder are monitored during the machining process. A threshold is established for determining the appearance of chatter using only the machine’s internal sensors.
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Zhu, Cheng Jun, Qi Shu Qin i Peng Er Bao. "The Study of the Multi-Body System Theory on Basis of CNC Milling Machine Error". Advanced Materials Research 383-390 (listopad 2011): 1304–9. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1304.

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CNC machine, especially CNC milling machine, is the main production equipment in the industries of machinery, iron and steel, automobile manufacturing and so on. However, the errors are the main constraints to the processing quality and the precision measurement of CNC machine. Based on the multi-body system theory, the article models the error of Siemens CNC milling machine. In terms of the analysis of the error model, it is argued that the processing precision of CNC milling machine can be improved through controlling and compensating the error in the process of installation and manufacturing.
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Zhu, Cheng Jun, Qi Shu Qin i Peng Er Bao. "The Study of the Multi-Body System Theory on Basis of CNC Milling Machine Error". Advanced Materials Research 433-440 (styczeń 2012): 444–49. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.444.

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CNC machine, especially CNC milling machine, is the main production equipment in the industries of machinery, iron and steel, automobile manufacturing and so on. However, the errors are the main constraints to the processing quality and the precision measurement of CNC machine. Based on the multi-body system theory, the article models the error of Siemens CNC milling machine. In terms of the analysis of the error model, it is argued that the processing precision of CNC milling machine can be improved through controlling and compensating the error in the process of installation and manufacturing.
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Knápek, Tomáš, Štěpánka Dvořáčková i Martin Váňa. "The Effect of Clearance Angle on Tool Life, Cutting Forces, Surface Roughness, and Delamination during Carbon-Fiber-Reinforced Plastic Milling". Materials 16, nr 14 (14.07.2023): 5002. http://dx.doi.org/10.3390/ma16145002.

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This study aimed to investigate the effect of the clearance angle of the milling tool on wear, cutting forces, machined edge roughness, and delamination during non-contiguous milling of carbon-fiber-reinforced plastic (CFRP) composite panels with a twill weave and 90° fiber orientation. To achieve the objective of the study, it was first necessary to design suitable tools (6 mm diameter sintered carbide shank milling cutters) with a variety of clearance angles (8.4°, 12.4°, and 16.4°) and all the machinery and measuring equipment for the research to be carried out. Furthermore, measurement and evaluation methods for cutting tool wear, cutting forces, machined edge roughness, and delamination were developed. Last but not least, the results obtained during the research were summarized and evaluated. From the experiments conducted in this study, it was found that the tool clearance angle has a significant effect on tool wear, roughness of the machined surface, and delamination of the carbon fiber composite board. The tool with a clearance angle of 8.4° wore faster than the tool with a clearance angle of 16.4°. The same trend was observed for cutting force, machined surface roughness, and delamination. In this context, it was also shown that the cutting force increased as the tool wear increased, which in turn increased surface roughness and delamination. These results are of practical significance, not only in terms of the quality of the machined surface but also in terms of time, cost, and energy savings when machining CFRP composite materials.
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Gao, Jian She, Wei Wei Yang, De Ping Liu, Yu Ping Wang i An Qing Zhang. "Analysis of Precision Reliability for CX Series of Five-Axis Turning-Milling Center". Advanced Materials Research 383-390 (listopad 2011): 4775–82. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4775.

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Five-axis turning-milling center is an important and advanced NC machine in fields of military industry, aerospace, automobile and medical machinery. The kinematics equation is built based on D-H method by the analysis of the structure of five-axis turning-milling center. The precision workspace is presented and its definition is given. The precision workspace of five-axis turning-milling center is analyzed based on Monte Carlo method. The mathematical model of precision reliability for machining center is built. The sensitivity of precision reliability for machining center is analyzed using analytical method. Finally, sensitivity histograms are given.
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Mgherony, Abdul W., Balázs Mikó i Ágota Drégelyi-Kiss. "DESIGN OF EXPERIMENT IN INVESTIGATION REGARDING MILLING MACHINERY". Cutting & Tools in Technological System, nr 92 (1.07.2020): 68–84. http://dx.doi.org/10.20998/2078-7405.2020.92.09.

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Rozprawy doktorskie na temat "Milling machinery"

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Herman, Paul Andrew. "Improvement of surface finish quality in peripheral milling VIA precision compensation for cutter runout". Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16696.

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Lazoğlu, İsmail. "Analysis and optimization of milling force system for workpiece with complicated geometry". Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16032.

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Hekman, Keith Alan. "On-line identification of cutter runout in end milling processes". Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/16748.

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Fan, Sai Kit. "An study of unit machine operations for tool paths in high speed milling /". View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?IELM%202008%20FAN.

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Galiotto, A., i Adriano Peruzzi. "Cold Milling - 39: innovative temperature/humidity control on milling operation". Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34142.

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Content: Air temperature and humidity are fundamental in the milling operation. There is a complicated correlation between air conditions and leather moisture that is practically impossible to predict in industrial process. Many important characteristics like softness, grain, pebble, yield depend on leather moisture. This patented system is the latest improvement in milling drums technology that keeps the leather cooler and allows a precise and optimal humidity control. Designed for soft, tight-grained leathers, especially from organic tannages and opened to a wide range of new operating conditions impossible with traditional machinery. The original new design makes the milling drum completely independent from the outside environment with many advantages: consistency over seasons, shorter transition time, energy savings. The original design is recognized by international patent, laboratory results on leather will be displayed during the presentation. Take-Away: The original new Cold Milling technology design makes the milling drum completely independent from the outside environment with many advantages: consistency over seasons, shorter transition time, energy savings. Nappa leather and all tight-grained leathers, especially organic tannaed, are beneficiary of this new technology.
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Carpenter, Ian David. "Machinability assessment and tool selection for milling". Thesis, Online version, 1996. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.286659.

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Liles, Howard J. "High throughput profile millling for the flexible and accelerated processing of electric steels". Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47628.

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The proliferation of electric machines has drastically increased in recent years and is likely to increase into the future. This interest in the production of advanced, high power density electrical machines that are small in size has heightened the need for flexible manufacturing processes to produce their laminated components during short batch and prototyping production runs. A means of cost effective, accelerated prototyping of these machines will have a substantial impact on their design and optimization, reducing time requirements to produce and test a given design. A review of the current manufacturing methods for prototyping electric machines was conducted. In particular, laser cutting, electric discharge machining, and abrasive waterjet (AWJ) machining were researched as competitive processes. Each of these methods exhibits marked advantages and disadvantages that present the opportunity for a new process to compete. This work investigates the applicability of high throughput profile milling (HTPM) for the prototyping of advanced electric machines, specifically, the process parameter space for milling of electrical steels. The material response will be determined by characterizing its specific cutting energy and utilizing this to develop a model to predict cutting forces during the milling process. Optimal process parameters will be investigated to obtain maximum productivity and minimal burr formation. Finally, the impact of HTPM processing on the magnetic properties of electrical steels will be compared to that of a leading prototyping technology, AWJ machining.
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Thompson, Michael B. "Development of a five-axis machining algorithm in flat end mill roughing /". Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd823.pdf.

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Fowler, Gary. "Abrasive water-jet : controlled depth milling of titanium alloys". Thesis, University of Nottingham, 2003. http://eprints.nottingham.ac.uk/11436/.

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Abrasive waterjet (AWJ) technology is used in a routine manner in manufacturing industry to cut materials that are difficult to cut by other methods. Whilst the technology for through cutting of materials is mature, the process is also being developed for controlled depth milling (CDM) of materials. The aerospace industry have a requirement to remove redundant material from components manufactured from difficult to machine Ti6Al4V and titanium aluminide alloys and thus reduce component weight. The two main processes available to facilitate this are chemical milling and AWJ-CDM. The two processes have the advantage that they impose negligible forces, thus allowing flexible structures to be processed. However, the process of chemical milling is under threat due to the high costs associated with the disposal of the spent acids. Thus, this research seeks to evaluate the A WJ-CDM process as a replacement for chemical milling for Ti6A14V and titanium aluminide alloys. The magnitude and effect of the process characteristics of chemical milling on fatigue life are well established; however, this is not the case for AJW-CDM. The aerospace industry considers the characteristics of surface roughness, grit embedment and surface morphology to be significant parameters in determining the fatigue life of components manufactured using AJW-CDM. Therefore, before AJW-CDM can be considered a viable alternative, the effect of the process variables on the workpiece characteristics have first to be established. The current research has determined the role of a number of process parameters on the material removal rate, roughness and waviness, grit embedment and surface morphology in the AJW-CDM of Ti6AI4V and titanium aluminide. Nozzle traverse speed and jet impingement angle are shown to govern the operative mechanism of material removal and thus the material removal rate. It is also shown that the surface waviness can be reduced as the traverse speed is increased and as the jet impingement angle is decreased, but it should be noted that waviness increases with number of passes of the jet over the workpiece. The surface roughness is not strongly dependent on traverse speed. Surface waviness and roughness are strongly dependent on jet impingement angle; significant reductions are possible by employing low angle milling techniques. Smaller sized grit leads to a reduction in material removal rate but also to a decrease in both waviness and roughness. It has been demonstrated that grit embedment can be minimised either by milling with a high jet traverse speed at low impingement angles or by low speed milling at jet impingement angles up to 45°in the backward direction only. However, even in the best cases, 5% of the area of a milled surface comprised of embedded grit. Surface morphology can either exhibit directional grooving or cratering, depending upon complex interactions of the various processing parameters. The understanding of the role of various process parameters on the workpiece characteristics will allow the process parameters to be optimised for given requirements. Future work needs to examine the fatigue performance of the AJW-CDM structures, and again optimisation of the processing parameters to maximise fatigue life can be performed. Masking has been employed to provide an economic manufacturing solution for the AJW-CDM process for a specific component. Thus, AJW-CDM has been established as a potential replacement process for chemical milling.
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El-Hofy, Mohamed Hassan. "Milling/routing of carbon fibre reinforced plastic (CFRP) composites". Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5529/.

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The research relates to a study on the routing/slotting of CFRP composites of the type used in aerospace applications. Following a literature review, 3 phases of experimental work were undertaken to evaluate the effects of key process variables on the machinability of CFRP. The influence of varying operating parameters, tool material and cutting environment were initially investigated in Phase 1 work. The results showed that use of PCD was critical and highlighted the importance of chilled air in maintaining adequate tool life and acceptable workpiece integrity. Delivery of chilled air through a single-nozzle arrangement generally led to an increase in forces and delamination with the twin-nozzle configuration showing superior workpiece surface roughness. Phase 2 work detailed the effect of workpiece lay-up configuration on cutting forces, temperature and surface integrity following slotting and routing. Plies in the 45 direction generally exhibited the highest level of surface damage following machining. Experiments in Phase 3 showed that relatively small helix angles (± 3) had a negligible effect on tool life, forces and temperature. In addition, cutters with a single relief angle were found to have lower stability in operation compared to tools with a secondary clearance angle, with detrimental effects on surface roughness.
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Książki na temat "Milling machinery"

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Kibbe, Richard R. Milling machine operations. New York: Wiley, 1985.

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Gingery, David J. The Milling Machine. Fordland, MO: D.J. Gingery, 1999.

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On the computational geometry of pocket machining. Berlin: Springer-Verlag, 1991.

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United Nations. Industrial Development Organization. Small-scale maize milling. [Vienna]: UNIDO, 1986.

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Beshada, Eshetu. Energy in wheat milling. Dublin: University College Dublin, 1996.

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Goldie & McCulloch Co., red. Oat hull grinder: Manufactured by the Goldie & McCulloch Co., Ltd., Galt, Ont. ... [S.l: s.n., 1987.

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Seemann, Stefan. Einfluss des Mahlsystems und der Mahlatmosphäre auf die Zementeigenschaften. Düsseldorf: Verlag Bau + Technik, 2010.

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Lucas, Adam. Wind, water, work: Ancient and medieval milling technology. Leiden: Brill, 2006.

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Lucas, Adam. Wind, water, work: Ancient and medieval milling technology. Leiden: Brill, 2003.

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Millers, Association of Operative. Cereal millers handbook. [S.l.]: Association of Operative Millers, 1994.

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Części książek na temat "Milling machinery"

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Jonsson, Lars-Ove, David A. V. Dendy, Karen Wellings i Varis Bokalders. "7. Installation and Safety of Milling; Summary of Milling Problems; Small-Scale Milling Machinery". W Small-scale Milling, 81–88. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1994. http://dx.doi.org/10.3362/9781780445922.007.

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Cangioli, Filippo, Steven Chatterton, Paolo Pennacchi i Edoardo Sabbioni. "Dynamic Characterization of Milling Plant Columns". W Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics & Laser Vibrometry, Volume 8, 311–21. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30084-9_29.

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Molenaar, Jean-michel, i Daniele Ingrassia. "CNC Milling". W Mastering Digitally Controlled Machines, 99–152. Berkeley, CA: Apress, 2024. http://dx.doi.org/10.1007/978-1-4842-9849-7_4.

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Jayendran, Ariacutty. "The milling machine". W Englisch für Maschinenbauer, 111–16. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-663-14137-2_19.

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Jayendran, Ariacutty. "The milling machine". W Englisch für Maschinenbauer, 111–16. Wiesbaden: Vieweg+Teubner Verlag, 1997. http://dx.doi.org/10.1007/978-3-322-91976-2_19.

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Huda, Zainul. "Milling Operations and Machines". W Machining Processes and Machines, 107–31. First edition. | Boca Raton : CRC Press, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003081203-9.

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Jabran, Sohaib, Shajee Ahmed, Sarmad Afzal i Faizan Tariq. "Axes CNC Milling Machine". W Functional Reverse Engineering of Strategic and Non-Strategic Machine Tools, 41–56. First edition. | Boca Raton : CRC Press, 2021. |: CRC Press, 2021. http://dx.doi.org/10.1201/9780367808235-5.

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Njagi, Timothy, i Yukichi Mano. "Toward a Green Revolution in Sub-Saharan Africa: Farm Mechanization in the Mwea Irrigation Scheme". W Emerging-Economy State and International Policy Studies, 63–73. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-5542-6_5.

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AbstractGovernments in Sub-Saharan Africa (SSA) have made concerted efforts to improve farmers’ adoption of modern technologies in their farm operations to realize a rice Green Revolution, improve food security, and alleviate poverty. However, smallholder farmers’ access to farm mechanization in SSA remains constrained due to supply-side and demand-side challenges. On the supply side, the market for agricultural machinery services is often underdeveloped. On the demand side, the smallholders with inadequate knowledge of improved rice cultivation practices have limited demand for mechanized services despite increasing wage rates. This study analyzes the mechanization process of rice farmers in the Mwea Irrigation Scheme, Kenya. The Mwea Irrigation Scheme is the most advanced rice production area in SSA, with farmers familiar with improved rice cultivation practices, well-functioning input credit markets, and millers adopting modern milling technologies, enabling local rice to compete with imported Asian rice. Analyzing original data collected in 2011, 2016, and 2018, we found that most farmers in Mwea implemented rotavation using tractor services provided by farmers’ cooperatives, while they implemented leveling using draft animals. Non-cooperative members reduced tractor use and adopted draft animals to implement both harrowing and leveling, implying the importance of a well-developed mechanization service market.
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Georghiou, Luke, J. Stanley Metcalfe, Michael Gibbons, Tim Ray i Janet Evans. "Renold Power Transmission (Holroyd Machine Tools & Rotors): Rotor Milling Machines". W Post-Innovation Performance, 265–69. London: Palgrave Macmillan UK, 1986. http://dx.doi.org/10.1007/978-1-349-07455-6_32.

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Uhlmann, E., F. Mahr, Y. Shi i U. von Wagner. "Process Machine Interactions in Micro Milling". W Lecture Notes in Production Engineering, 265–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32448-2_12.

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Streszczenia konferencji na temat "Milling machinery"

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Zhang, Rong. "Study on Technology and Programming for Comprehensive Milling". W 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mmebc-16.2016.351.

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Zeng, Chuiyuan, i Shaohui Su. "Design Clamping Device of Milling Fixture Base on Contradiction Matrix". W 2015 3rd International Conference on Machinery, Materials and Information Technology Applications. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icmmita-15.2015.267.

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Niu, Xinghua, Tianding Wang, Tiemin Zhao i Qianyou Huang. "Experimental Study On The Identification Model Of Dynamic Milling Force Coefficient". W 2016 4th International Conference on Machinery, Materials and Computing Technology. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icmmct-16.2016.101.

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Zhou, Libo, i Hao Wu. "Study on the Inner Spherical Multi Axis Milling Process". W The 3rd International Conference on Machinery, Materials Science and Energy Engineering (ICMMSEE 2015). WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814719391_0005.

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Suo, Qingtao, Baocai Xu, Jianjiang Wang i Boyuan Huang. "Effect of high energy ball milling on electromagnetic properties of FeNi absorbing materials". W ADVANCES IN MATERIALS, MACHINERY, ELECTRONICS II: Proceedings of the 2nd International Conference on Advances in Materials, Machinery, Electronics (AMME 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5033578.

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Cao, YongJie. "Thermal Errors Measurement and Optimization of a CNC Milling Machine". W The 3rd International Conference on Machinery, Materials Science and Energy Engineering (ICMMSEE 2015). WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814719391_0035.

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AHMED, Zeyad, Rafał NADULSKI i Marian PANASIEWICZ. "THE INFLUNCE OF WHEAT HARDNESS ON ENERGY CONSUMPTION DURING THE WHEAT MILLING". W IX International ScientificSymposium "Farm Machinery and Processes Management in Sustainable Agriculture". Departament of Machinery Exploittation and Management of Production Processes, University of Life Sciences in Lublin, 2017. http://dx.doi.org/10.24326/fmpmsa.2017.3.

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Rahman, AHM E., Issam Abu-Mahfouz i Scott Carbaugh. "Effect of Silicone Damping on Work Vibration in CNC Milling Process". W ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11346.

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Abstract Vibration dampening in machining processes is an important part of a machine being precise, low maintenance, and long lasting. Being able to utilize dampening materials in the design of machinery in existing structural tubing could allow designers to isolate vibration sources from critical components more effectively than with current methods. The purpose of this research was to show and analyze the effect of dampening materials undergoing specific machining vibration. An experiment was designed that used hollow columns both with and without dampening material and a CNC Mill to generate different types of vibration. These vibrations are detected using accelerometers at the top and bottom of the structure. By creating a variable matrix testing different viscosity dampening materials, different spindle speed, and different depth of cut, vibration with different frequency and amplitude was tested. By analyzing the characteristics of the vibration transmitted by the structure without a dampening material compared to that same vibration with a dampening material, a conclusion was made as to whether these materials dampen machining vibration.
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Shi, Xusheng, Lihong Qiao i Pinxue Rao. "An Adaptive Constant Scallop-height Tool-Path Planning Method For Turn-Milling Machining of NURBS free-form surfaces". W First International Conference on Information Sciences, Machinery, Materials and Energy. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icismme-15.2015.234.

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Henderson, Andrew, Cristina Bunget i Thomas Kurfess. "Integration of On-Machine Measurements in the Force Modeling for Machining of Advanced Nickel-Based Superalloys". W ASME/ISCIE 2012 International Symposium on Flexible Automation. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/isfa2012-7247.

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Nickel-based superalloys are specially designed for applications where high strength, creep resistance, and oxidation resistance are critical at high temperatures. Many of their applications are the hot gas sections of turbo-machinery (e.g. jet engines and gas turbines). With greater demands on the performance and efficiency of these types of machines, the firing temperatures are reaching higher levels and nickel-based superalloys are being utilized more because of their excellent mechanical qualities at extreme temperatures. However, the properties that make them attractive for these applications present difficult challenges for the manufacture, particularly machining, of the components that are made from these materials. Considering the extreme environment that these components operate in, part quality, in particular surface quality, is paramount. The damage and stresses introduced to the surfaces of these components during manufacture needs to be well understood and controlled in order to ensure that premature component and machine failures do not occur. With improved process models and on-machine measurement capabilities, the in-process cutting forces and temperatures can be better understood and therefore subsurface damage can be better controlled. Since cutting forces and temperatures are direct contributors to subsurface damage, better control of these aspects would then lead to better control of subsurface damage. This paper discusses the use of on-machine touch probes to measure wear on milling tools and using those measurements to update a mechanistic force model for more accurate prediction of the cutting forces incurred during the milling of nickel-based superalloys.
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Raporty organizacyjne na temat "Milling machinery"

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Clinton, Charles, Guangming Zhang i Albert J. Wavering. Stiffness modeling of a Stewart-platform-based milling machine. Gaithersburg, MD: National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5918.

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Liu, Hongrui, i Rahul Ramachandra Shetty. Analytical Models for Traffic Congestion and Accident Analysis. Mineta Transportation Institute, listopad 2021. http://dx.doi.org/10.31979/mti.2021.2102.

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In the US, over 38,000 people die in road crashes each year, and 2.35 million are injured or disabled, according to the statistics report from the Association for Safe International Road Travel (ASIRT) in 2020. In addition, traffic congestion keeping Americans stuck on the road wastes millions of hours and billions of dollars each year. Using statistical techniques and machine learning algorithms, this research developed accurate predictive models for traffic congestion and road accidents to increase understanding of the complex causes of these challenging issues. The research used US Accidents data consisting of 49 variables describing 4.2 million accident records from February 2016 to December 2020, as well as logistic regression, tree-based techniques such as Decision Tree Classifier and Random Forest Classifier (RF), and Extreme Gradient boosting (XG-boost) to process and train the models. These models will assist people in making smart real-time transportation decisions to improve mobility and reduce accidents.
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Kramer, Thomas R. Process plan expression, generation, and enhancement for the Vertical Workstation milling machine in the Automated Manufacturing Research Facility at the National Bureau of Standards. Gaithersburg, MD: National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.ir.87-3678.

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Kramer, Thomas R., i W. Timothy Strayer. Error prevention and detection in data preparation for the Vertical Workstation milling machine in the Automated Manufacturing Research Facility at the National Bureau of Standards. Gaithersburg, MD: National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.ir.87-3677.

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Slone, Scott, Marissa Torres, Alexander Stott, Ethan Thomas i Robert Ibey. CRREL Environmental Wind Tunnel upgrades and the Snowstorm Library. Engineer Research and Development Center (U.S.), styczeń 2024. http://dx.doi.org/10.21079/11681/48077.

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Environmental wind tunnels are ideal for basic research and applied physical modeling of atmospheric conditions and turbulent wind flow. The Cold Regions Research and Engineering Laboratory's own Environmental Wind Tunnel (EWT)—an open-circuit suction wind tunnel—has been historically used for snowdrift modeling. Recently the EWT has gone through several upgrades, namely the three-axis chassis motors, variable frequency drive, and probe and data acquisition systems. The upgraded wind tunnel was used to simulate various snowstorm conditions to produce a library of images for training machine learning models. Various objects and backgrounds were tested in snowy test conditions and no-snow control conditions, producing a total of 1.4 million training images. This training library can lead to improved machine learning models for image-cleanup and noise-reduction purposes for Army operations in snowy environments.
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Papasodoro, C., D. Bélanger, G. Légaré-Couture i H. Russel. Assessment of approaches and costs associated with the correction of the HRDEM product data in the Canadian Arctic. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331974.

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The High-Resolution Digital Elevation Model (HRDEM) was created as part of the National Elevation Data Strategy to provide detailed elevation data across the country. For the Canadian Arctic, the HRDEM was based on the ArcticDEM initiative with additional post-processing by the Canada Centre for Mapping and Earth Observation to create a 2-meter Digital Surface Model (DSM) covering a geographic region of approximately 4.6 million km2. This report provides details on the investigation of the data issues within HRDEM in the North, available open and commercial sources of elevation data that could be used to improve the product, and technologies available to generate high resolution DSM at similar levels of accuracy and resolution than the current HRDEM. In addition, the report summarizes the results of a research into the common, as well as more advanced (e.g., machine learning), methods for improving the product. In summary, the intent of this investigation was to provide supporting information to address the data anomalies in HRDEM and present a path forward.
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Cruces, Guillermo. Conditional Cash Transfers, Debit Cards and Financial Inclusion: Experimental Evidence from Argentina. Inter-American Development Bank, sierpień 2023. http://dx.doi.org/10.18235/0005079.

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Cash transfer and other social protection programs in developing countries have often been accompanied by measures to foster financial inclusion, such as the adoption and use of bank accounts and electronic means of payments. Argentina's social benefits are paid in bank accounts and accessed through debit cards. With the simultaneous objective of fostering formality among beneficiaries and stores, the use of debit cards for purchases has been incentivized by means of additional subsidies. We studied the low take-up of these extra benefits by means of a field experiment involving 400,000 beneficiaries of Argentinas largest conditional cash-transfer program (with 2.2 million beneficiaries who are the parents of four million children, 40% of the countrys 0-17-year olds). By using their debit card to spend the allowance, rather than withdrawing cash from ATMs, they can receive a rebate of 15% of their expenditures. However, they systematically fail to claim this benefit: only about 25% of beneficiaries receive this transfer. Our experiment provided information about the effectiveness of an information campaign conducted via text messages or through on-screen messages at ATM machines. The campaign increased purchases with debit cards and subsequent rebates significantly but not substantially in the short run. However, beneficiaries who increased their use of debit cards do not exhibit a higher probability of having access to credit through the financial system, nor higher levels of formal employment. The results indicate that cultural factors (a preference for cash), administrative hassle and citizen security issues are relevant issues that limit the potential of financial inclusion through increased use of digital means of payment.
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Yedidia, I., H. Senderowitz i A. O. Charkowski. Small molecule cocktails designed to impair virulence targets in soft rot Erwinias. Israel: United States-Israel Binational Agricultural Research and Development Fund, 2020. http://dx.doi.org/10.32747/2020.8134165.bard.

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Chemical signaling between beneficial or pathogenic bacteria and plants is a central factor in determining the outcome of plant-microbe interactions. Pectobacterium and Dickeya (soft rot Erwinias) are the major cause of soft rot, stem rot, and blackleg formed on potato and ornamentals, currently with no effective control. Our major aim was to establish and study specific bacterial genes/proteins as targets for anti-virulence compounds, by combining drug design tools and bioinformatics with experimental work. The approach allowed us to identify and test compounds (small molecules) that specifically interfere with the activities of these targets, by this impairing bacterial virulence. Two main targets were selected within the frame of the BARD project. The first is the ATP-binding cassette (ABC) transporters and methyl-accepting chemotaxis proteins (MCP) that have been characterized here for the first time in Pectobacteriaceae, and the second is the quorum sensing (QS) machinery of Pectobacterium with its major proteins and in particular, the AHL synthase ExpI that was identified as the preferred target for inhibition. Both systems are strongly associated with bacterial virulence and survival in planta. We found that Pectobacteriaceae, namely Dickeya and Pectobacterium, encode more ABC transporters and MCP in their genomes, compared to other bacteria in the order. For MCP, soft rot Pectobacteriaceae not only contain more than 30 MCP genes per strain, but also have more diverse ligand binding domains than other species in the Enterobacteriales. These findings suggest that both ABC transporters and MCP are important for soft rot Pectobacteriaceae pathogenicity. We now have a selection of mutants in these proteins that may be further explored to understand their direct involvement in virulence. In parallel, we studied the QS central proteins in pectobacteria, the signaling molecule N-acyl-homoserine lactone synthase, ExpI, and the response regulator ExpR, and established their phylogenetic relations within plant pathogenic Gram negative bacteria. Next, these proteins were used for virtual screening of millions of compounds in order to discover new compounds with potential to interfere with the QS machinery. Several natural compounds were tested for their interference with virulence related traits in Pectobacterium and their capability to minimize soft rot infections. Our findings using microcalorimetric binding studies have established for the first time direct interaction between the protein ExpI and two natural ligands, the plant hormone salicylic acid and the volatile compound carvacrol. These results supported a model by which plants interfere with bacterial communication through interkingdom signaling. The collaborative project yielded two research papers and a comprehensive review, which included new computational and bioinformatics data, in Annu. Rev. Phytopathol., the highest ranked journal in phytopathology. Additional two papers are in preparation. In order to transform the fundamental knowledge that have been gained during this collaborative BARD project into agricultural practice, to control soft rot bacteria, we have submitted a continual project.
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Yang, Yu, i Hen-Geul Yeh. Electrical Vehicle Charging Infrastructure Design and Operations. Mineta Transportation Institute, lipiec 2023. http://dx.doi.org/10.31979/mti.2023.2240.

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California aims to achieve five million zero-emission vehicles (ZEVs) on the road by 2030 and 250,000 electrical vehicle (EV) charging stations by 2025. To reduce barriers in this process, the research team developed a simulation-based system for EV charging infrastructure design and operations. The increasing power demand due to the growing EV market requires advanced charging infrastructures and operating strategies. This study will deliver two modules in charging station design and operations, including a vehicle charging schedule and an infrastructure planning module for the solar-powered charging station. The objectives are to increase customers’ satisfaction, reduce the power grid burden, and maximize the profitability of charging stations using state-of-the-art global optimization techniques, machine-learning-based solar power prediction, and model predictive control (MPC). The proposed research has broad societal impacts and significant intellectual merits. First, it meets the demand for green transportation by increasing the number of EV users and reducing the transportation sector’s impacts on climate change. Second, an optimal scheduling tool enables fast charging of EVs and thus improves the mobility of passengers. Third, the designed planning tools enable an optimal design of charging stations equipped with a solar panel and battery energy storage system (BESS) to benefit nationwide transportation system development.
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Petit, Vincent. Road to a rapid transition to sustainable energy security in Europe. Schneider Electric Sustainability Research Institute, październik 2022. http://dx.doi.org/10.58284/se.sri.bcap9655.

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Decarbonization and energy security in Europe are two faces of the same coin. They are both related to the large dependency of the European Union economy on fossil fuels, which today represent around 70% of the total supply of energy. The bulk of these energy resources are imported, with Russia being the largest supplier, accounting for 40% of natural gas and 27% of oil imports. However, fossil fuels are also the primary root cause of greenhouse gas emissions, and the European Union is committed to reduce those by 55% by 2030 (versus 1990). This report is based on the landmark research from the Joint Research Center of the European Commission, the “Integrated Database of the European Energy Sector”, which for the first time mapped actual energy uses for each country within the European Union, across 17 sectors of activity, with data granularity at the level of each process step (or end-use) of each of these sectors. Our approach here has been to systematically review these process steps (or end-uses) and qualify the extent to which they could be electrified, effectively removing the demand for fossil fuels as a result. We have focused only on those process steps where technology was already widely available and for which we evaluated the switch to be relatively easy (or attractive). In other words, we estimated the impact of rapid electrification of “easy to abate” activities. The conclusion of this evaluation is that the share of electricity demand in the final energy mix could jump from around 20% today to 50%, which would drive a reduction in emissions at end-use of around 1,300 MtCO2 /y, as well as a drop in natural gas and oil supply of around 50%. As a result of such transformation, electricity demand would nearly double, with the bulk of that growth materializing in the building sector. Short-term, the challenge of addressing climate targets while providing for energy security is thus intimately connected to buildings. While such transition would certainly require major infrastructure upgrades, which may prove a roadblock to rapid deployment, we find that the combination of energy efficiency measures (notably digital) and distributed generation penetration (rooftop solar) could significantly tame the issue, and hence help accelerate the move away from fossil fuels, with energy spend savings as high as 80% across some building types; a major driver of change. Beyond this, further potential exists for electrification. Other measures on the demand-side will include deeper renovations of the industrial stock (notably in the automotive, machinery, paper, and petrochemical industries for which our current assessment may be underestimated) and further electrification of mobility (trucks). The transition of the power system away from coal (and ultimately natural gas) will then also play a key role, followed ultimately by feedstocks substitution in industry. Some of these transitions are already on the way and will likely bring further improvements. The key message, however, is that a significant opportunity revolves around buildings to both quickly decarbonize and reduce energy dependencies in Europe. Rapid transformation of the energy system may be more feasible than we think. We notably estimate that, by 2030, an ambitious and focused effort could help displace 15% to 25% of natural gas and oil supply and reduce emissions by around 500 MtCO2 /y (note that these savings would come on top of additional measures regarding energy efficiency and flexibility, which are not the object of this study). For this to happen, approximately 100 million buildings will need renovating, and a similar number of electric vehicles would need to hit the road.
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