Готові списки джерел за темами / Rod packings

Добірка наукової літератури з теми "Rod packings"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Rod packings"

1

Lidin, Sven, Michael Jacob, and Sten Andersson. "A Mathematical Analysis of Rod Packings." Journal of Solid State Chemistry 114, no. 1 (January 1995): 36–41. http://dx.doi.org/10.1006/jssc.1995.1005.

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2

Andersson, Sten. "New rod packings, polyhedra, and virus structures." Zeitschrift für Kristallographie 226, no. 8 (August 2011): 667–69. http://dx.doi.org/10.1524/zkri.2011.1418.

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3

Wouterse, A., S. Luding, and A. P. Philipse. "On contact numbers in random rod packings." Granular Matter 11, no. 3 (February 5, 2009): 169–77. http://dx.doi.org/10.1007/s10035-009-0126-6.

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4

Blatov, V. A. "A method for topological analysis of rod packings." Structural Chemistry 27, no. 6 (June 1, 2016): 1605–11. http://dx.doi.org/10.1007/s11224-016-0774-1.

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5

Rosi, Nathaniel L., Jaheon Kim, Mohamed Eddaoudi, Banglin Chen, Michael O'Keeffe, and Omar M. Yaghi. "Rod Packings and Metal−Organic Frameworks Constructed from Rod-Shaped Secondary Building Units." Journal of the American Chemical Society 127, no. 5 (February 2005): 1504–18. http://dx.doi.org/10.1021/ja045123o.

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6

O'Keeffe, M., J. Plévert, Y. Teshima, Y. Watanabe, and T. Ogama. "The invariant cubic rod (cylinder) packings: symmetries and coordinates." Acta Crystallographica Section A Foundations of Crystallography 57, no. 1 (January 1, 2001): 110–11. http://dx.doi.org/10.1107/s010876730001151x.

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7

Hauck, Jürgen, and Klaus Mika. "Characterization Of Structure Types By Lattice Complexes With Increased Self-Coordination Numbers." Zeitschrift für Naturforschung B 61, no. 8 (August 1, 2006): 983–94. http://dx.doi.org/10.1515/znb-2006-0810.

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Анотація:
Most of the 402 characteristic Wyckoff positions were analyzed for the numbers 1, 2, 3, etc. of lattice complexes with increased self-coordination numbers Ti of the i = 1 - 3 shells. The Wyckoff letters of standardized inorganic structures with the proper space group number get an additional number 1, 2, 3, etc., if the x, y, z, c/a, cos γ , etc. parameters are close to the parameters of these lattice complexes. The lattice complexes 1, 2, 3, etc. or combinations of several of these complexes are sphere, layer or rod packings. The plate- or needle-like habit of single crystals can frequently be correlated with layered or rod-like packings. Combinations of lattice complexes can be analyzed for attractive or repulsive interactions by structure maps
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8

HAUCK, J., and K. MIKA. "INTERACTIONS IN ORDERED SURFACTANTS, POLYMERS AND COLLOIDS." International Journal of Modern Physics B 17, no. 10 (April 20, 2003): 2053–60. http://dx.doi.org/10.1142/s021797920301803x.

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The surfactant structures are approximately given by the zero-potential surfaces of A + and B - atoms in circle or sphere packings. The Dirichlet domains of A atoms are connected by T1 channels to neighboring A domains in rod like structures with T1 = 2, or layered structures at increased T1 values. Micelles are usually isolated with T1 = 0 or 1 channels. Layered or rod like structures are formed at A–A attraction while isolated micelles are formed at repulsive A–A interactions. The rod like structures are similar to polymer chains of A = carbon atoms with T1 = 2 neighbors. The ordered micelle structures are observed for charged colloid particles A +.
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9

HAUCK, J., and K. MIKA. "CRYSTAL HABIT OF MINERALS — A CRYSTAL CHEMICAL APPROACH." International Journal of Modern Physics B 21, no. 06 (March 10, 2007): 871–83. http://dx.doi.org/10.1142/s0217979207036734.

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Homogeneous particles A like carbon atoms in diamond, CO 3 ions in CaCO 3, or sulfur molecules in sulfur with different A–A interactions are ordered in such a way that the bulk structure can be characterized by the self-coordination numbers T i, i = 1-3, of nearest, second, and third neighbors. There are about 500 sets with increased Ti values and about 500 sets with reduced Ti values, which can be obtained from characteristic lattice complexes. The different sets with increased Ti values are characterized by S, L, or R for sphere, layer, or rod packing. Two or more particles A, B, C, etc., can belong to the same set like Na and Cl atoms in NaCl or different sets like Ca and F atoms in CaF 2. The Dirichlet domains of A and B ( CaF 2) or A + B ( NaCl ) are approaches to the morphological lattices (cubes or rhombododecahedra). Planes with a high density of A positions and thus low h k l values like the {111} planes of octahedra are derived from Bravais' theory. The morphological lattices of layer or rod packings are layers or rods because of the increased densities of A in layers or rods.
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von Schnering, Hans Georg, Matthias Oehme, Germar Rudolf, W. Voigt, Hans Jörnvall, Viktor Mutt, Knut Maartmann-Moe, and Britt Karlsson. "Three-dimensional Periodic Nodal Surfaces which Envelope the Threefold and Fourfold Cubic Rod Packings." Acta Chemica Scandinavica 45 (1991): 873–76. http://dx.doi.org/10.3891/acta.chem.scand.45-0873.

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Більше джерел

Дисертації з теми "Rod packings"

1

Heydrich, Sandy [Verfasser], and Rob van [Akademischer Betreuer] Stee. "A tale of two packing problems : improved algorithms and tighter bounds for online bin packing and the geometric knapsack problem / Sandy Heydrich ; Betreuer: Rob van Stee." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2018. http://d-nb.info/1164012193/34.

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2

Evans, Myfanwy Ella. "Three-dimensional entanglement: knots, knits and nets." Phd thesis, 2011. http://hdl.handle.net/1885/9502.

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Three-dimensional entanglement, including knots, periodic arrays of woven filaments (weavings) and periodic arrays of interpenetrating networks (nets), forms an integral part of the analysis of structure within the natural sciences. This thesis constructs a catalogue of 3-periodic entanglements via a scaffold of Triply-Periodic Minimal Surfaces (TPMS). The two-dimensional Hyperbolic plane can be wrapped over a TPMS in much the same way as the two-dimensional Euclidean plane can be wrapped over a cylinder. Thus vertices and edges of free tilings of the Hyperbolic plane, which are tilings by tiles of infinite size, can be wrapped over a TPMS to represent vertices and edges of an array in three-dimensional Euclidean space. In doing this, we harness the simplicity of a two-dimensional surface as compared with 3D space to build our catalogue. We numerically tighten these entangled flexible knits and nets to an ideal conformation that minimises the ratio of edge (or filament) length to diameter. To enable the tightening of periodic entanglements which may contain vertices, we extend the Shrink-On-No-Overlaps algorithm, a simple and fast algorithm for tightening finite knots and links. The ideal geometry of 3-periodic weavings found through the tightening process exposes an interesting physical property: Dilatancy. The cooperative straightening of the filaments with a fixed diameter induces an expansion of the material accompanied with an increase in the free volume of the material. Further, we predict a dilatant rod packing as the structure of the keratin matrix in the corneocytes of mammalian skin, where the dilatant property of the matrix allows the skin to maintain structural integrity while experiencing a large expansion during the uptake of water.
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Книги з теми "Rod packings"

1

Gill, C. O. Apparatus for pasteurizing red meat carcasses. Ottawa: Research Branch, Agriculture and Agri-Food Canada, 1998.

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2

Wilce, Ysabeau S. Flora's fury: How a girl of sprit and a red dog confounded their friends, astounded their enemies, and learned the importance of packing light. Boston: Harcourt, 2012.

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3

United States. Packers and Stockyards Programs., ed. Concentration in the red meat packing industry. Washington, D.C: United States Dept. of Agriculture, Packers and Stockyards Programs, Grain Inspection, Packers, and Stockyards Administration, 1996.

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4

Welove Books&journals. Travel Journal: Record Your Adventures, Road Trip Planner, Travel Packing List, Memory Book. Lulu Press, Inc., 2020.

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5

Soucie, Gary. Traveling with Fly Rod and Reel: Everything You Need to Know about Planning, Booking, Preparing, and Packing for Fly-Fishing Trips Around the World. Holt & Company, Henry, 2014.

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6

Taylor, Rob, and Samantha Brown. Road Trip Survival Guide: Tips and Tricks for Planning Routes, Packing up, and Preparing for Any Unexpected Encounter along the Way. Simon & Schuster, 2021.

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7

Road Trip Survival Guide: Tips and Tricks for Planning Routes, Packing up, and Preparing for Any Unexpected Encounter along the Way. Simon & Schuster, 2021.

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8

Taylor, Rob. The Road Trip Survival Guide: Tips and Tricks for Planning Routes, Packing Up, and Preparing for Any Unexpected Encounter Along the Way. Simon & Schuster Audio and Blackstone Publishing, 2021.

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9

Wilce, Ysabeau S. Flora's Fury: How a Girl of Spirit and a Red Dog Confound Their Friends, Astound Their Enemies, and Learn the Importance of Packing Light. HMH Books for Young Readers, 2013.

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10

Blake, Bradley. Family Road Trip Planning Guide: One Vacation and Dad's Lessons Learned for Packing Crucial Items Most People Forget During Travel with Kids and Pets, Plus Advice to Make Sure Everyone Has Fun. Independently Published, 2021.

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Частини книг з теми "Rod packings"

1

"Mechanical piston rod packings." In Tribology Handbook, B26.1—B26.4. Elsevier, 1995. http://dx.doi.org/10.1016/b978-075061198-5/50054-0.

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2

"Rod Seals, Gland Seals, Gland Packings." In Encyclopedia of Tribology, 2802. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_101134.

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3

"dummy road packing." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 438. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_44627.

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4

"Packing and tank provisions." In European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), 47–237. United Nations, 2010. http://dx.doi.org/10.18356/82085b80-en.

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"Packing and tank provisions." In European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), 662–876. UN, 2020. http://dx.doi.org/10.18356/af7334ec-en.

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"Packing and tank provisions." In European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), 3–211. UN, 2016. http://dx.doi.org/10.18356/17092142-en.

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"Packing and tank provisions." In European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), 3–217. UN, 2018. http://dx.doi.org/10.18356/773fc70b-en.

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"Packing and tank provisions." In European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), 692–908. United Nations, 2022. http://dx.doi.org/10.18356/9789210014328c007.

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9

Yang, B. J., J. H. Yao, J. Q. Wang, Y. S. Chao, and E. Ma. "Bulk Metallic Glasses: Aluminum-Based." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000405.

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This paper details a systematic investigation of the formation of Al-based bulk metallic glasses, expanding on an earlier brief report.[] We discuss an approach for designing and predicting the best glass-forming composition in the Al–TM–RE systems, based on the atomic cluster packing model for the internal structure of the glass. The effects of additional elements in quaternary and quinary systems on the glass-forming ability and thermal stability of the glasses are also discussed. Three new compositions, Al86Ni6Y4.5Co2La1.5, Al86Ni7Y5Co1La1 and Al86Ni7Y4.5Co1La1.5, are capable of forming fully glassy rods of 1 mm in diameter; their glass transition and other thermal properties are systematically characterized.
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10

Awad, Carmen, Jacky Fayad, Nicolas Frangieh, Frédéric Morandini, Jean Louis Rossi, François Joseph Chatelon, Thierry Marcelli, Dominique Morvan, and Gilbert Accary. "Impact of the bulk density on fire spread through a homogenous vegetation layer." In Advances in Forest Fire Research 2022, 1657–64. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_254.

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The bulk density as definition represents the ratio between the packing ratio and the density of the vegetation. Therefore, it is directly related to the fuel load, the height and to the porosity of the vegetation. In fact, the bulk density plays an important role in fire propagation and behavior. Due to its dependence on the fuel porosity, the bulk density influences heat transfers inside the fuel bed, so, it can affect directly the rate of spread. Or, the bulk density influences also the fire intensity and flame characteristics (residence time, height and depth) due to its dependence of the fuel load and fuel bed height. However, despite the important influence of the bulk density on fire propagation, the literature does not clarify its impact on fire behavior, different points of view can be exanimated. So, the aim of this study is to investigate the role played by the bulk density upon both propagation parameters and heat transfer of a surface fire through a homogeneous vegetation layer. Investigations were conducted numerically using “FireStar2D”, a complete physical model based on multiphase formulation. Also, experimentally, tests were constructed at the university of Corsica at laboratory scale under no wind and no slope condition. In order to study the elementary effect of the bulk density on fire behavior, three different cases were evaluated: (a) variable fuel load with a constant bulk density, (b) variable fuel load and variable bulk density, (c) variable bulk density with a constant fuel load. Case (a) was only studied numerically, the obtained results are in agreement with the literature: the rate of spread increases with the fuel load until a specific value where the ROS becomes independent of it. Case (b) was evaluated numerically and experimentally using a fix fuel bed height. The numerical and the experimental results showed that the ROS is barely affected by both fuel load and bulk density. Finally, the results of the last case, with a constant fuel load, showed numerically the same tendency proposed by Rothermel: the rate of spread reaches a maximum value at an optimal packing ratio that depends of the surface-volume ratio of the vegetation. Or, experimentally the ROS decreases with the increase of the bulk density. Different variables such as the optical thickness, the fire intensity, the residence time, the radiation and convection heat fluxes have been analyzed.
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Тези доповідей конференцій з теми "Rod packings"

1

Kyrylyuk, Andriy V., Alan Wouterse, Albert P. Philipse, Masami Nakagawa, and Stefan Luding. "Random Packings Of Rod-Sphere Mixtures Simulated By Mechanical Contraction." In POWDERS AND GRAINS 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MICROMECHANICS OF GRANULAR MEDIA. AIP, 2009. http://dx.doi.org/10.1063/1.3179895.

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2

Shayer, Z., A. Baxter, and A. Shenoy. "Multi-Year Fuel Cycles in the MHR Core Using LEU/Th Fuel." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58054.

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The current Modular Helium Reactor (MHR) fuel cycle uses fissile LEU (19.8 wt% U-235) and depleted uranium in separate TRISO particles, in a single fuel rod within a graphite matrix. The TRISO particle volume packing fraction (PF) in the fuel rods is 29%, of which the LEU particle PF is 62%. The lifetime between refuelings is about 476 effective full power days (EFPD). In this paper we assess the possibility of replacing the depleted uranium TRISO particles with thorium TRISO particles, and evaluate the impact of such replacement on fuel cycle length. A preliminary scoping study was performed to determine the most promising fuel rod/zoning configurations. The scoping study indicates that there is advantage to separating the thorium TRISO particles from the LEU particles at the fuel rod level instead of mixing them within a single rod. An axial checkerboard distribution of the fuel rods where all uranium and all thorium rods are interchangeable along the axial direction within the graphite block is the most promising configuration that was identified in this study and can be lead to a fuel cycle length extension of 50% to 80% relative to the current design, with only a modest increase in the fissile material loading (15%–20%). To this advantage can be added the benefit of a significant reduction in nuclear waste and in health risk. This study also lays the foundation for improving the fuel rod arrangement within the graphite block and the graphite blocks within the entire reactor core. The analysis is limited to a once-through fuel cycle based on in-situ fissioning of the U-233, without further separation and reprocessing.
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3

von der Ohe, Christian B., Roy Johnsen, and Nuria Espallargas. "Hydraulic Cylinders for Offshore Splash Zone Operation: A Review of Piston Rod Failure Cases and Alternative Concepts." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79039.

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Hydraulic cylinders are used for many vital applications on offshore installations. For the long stroke cylinders used in the direct acting riser tensioning application the piston rod surface is exposed to severe degradation; combining corrosion, wear and mechanical stress. Direct acting riser tensioning systems are often used during ultra-deepwater offshore drilling, when exploring for oil and gas. These direct acting riser tensioning systems usually consist of 6 long stroke hydraulic cylinders located at the splash zone level. These cylinders ensure constant tensioning of the drilling riser as the drilling vessel is operated in ultra deep waters up to 3000 meters compensating for heave due to sea waves and tide. The direct acting tensioning systems have been in operation since the late 1990’s, but the system integrity and service life has so far not been acceptable. Operational experience shows that the thermal sprayed coatings applied on these piston rods have dramatically shorter life than predicted by qualification tests programs. The consequence of the failing rod surface is sudden coating damage such as pits and flaking which further damages the seals in the packing flange. As a result hydraulic oil leakages occurs, thus polluting the environment and in the worst case leads to loss of the tensioning in the riser causing subsequent drilling down time and eventual riser breakage and blowout. This paper will provide a generic summary of operational experience, development and degradation issues of direct-acting riser tensioning cylinder piston rod surfaces. Several case histories are included to highlight piston rod failures and an evaluation of alternative concepts to improve service life of piston rods is given.
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4

Zhang, Xiaodan, Chengjie Xia, Haohua Sun, and Yujie Wang. "Fast synchrotron X-ray tomography study of the rod packing structures." In POWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP, 2013. http://dx.doi.org/10.1063/1.4811943.

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5

Shuaijun, Zhou, Dong Ning, Du Jun, Yang Sai, and Yang Zhi. "Detection of packing filter rods based on visual saliency." In 2016 IEEE International Conference on Information and Automation (ICIA). IEEE, 2016. http://dx.doi.org/10.1109/icinfa.2016.7832029.

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6

Giacomelli, Enzo, Franco Graziani, Simone Pratesi, Giovanni Zonfrillo, and Iacopo Giovannetti. "Advanced Design of Packing and Cylinders for Hyper-Compressors for LDPE Production." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71291.

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The optimization of packing cup geometry is important for improving the reliability of hyper-compressors. The complex arrangement and the transmission of loads through the various components requires the use of FEA to properly determine the stress level. The need to reduce the sensitivity to external factors requires an investigation with more advanced simulations. The entire cylinder and associated components such as head flanges, cylinder chambers and tie rods, were modeled. This provided the characteristics of the interfaces and the boundary conditions necessary to simulate the packing cups. Considering the thickness, ring housing profile, lube-oil holes, mating surfaces, interference-fit and diameter make it possible to obtain the stresses at the most critical points. This new simulation approach shows the effect of the parameters that influence the stress level at critical points, thus optimizing the packing cup profile and its relevant features.
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7

Miller, Eric S., and James M. Blanding. "Strain Gage and Thermocouple Measurements of Hyper Compressor Packing Cups to Study Pressure Sealing Performance." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45100.

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Low Density Polyethylene (LDPE) production involves reactors operating at up to 3,000 bar pressure or even higher. The final stage of gas compression is done with a plunger-type machine called a “Hyper Compressor”. A “packing stack” for pressure sealing consists of multiple bronze packing rings and oil lubrication injection points; which are positioned in place by numerous packing cups. The distribution of pressure drop in a new cylinder and the changes in sealing behavior over its life are critical to design, but have long been prohibitively difficult to verify experimentally. Four cylinders were extensively instrumented; two in each of two successive test campaigns over four years’ time. Strain gages were located at the outside diameter of each packing cup to infer internal dynamic pressure across the packing stack. Included also in the high-speed data acquisition were strain gages on numerous additional components, thermocouples on packing cup faces, a pressure transducer in the low-pressure lubrication line, and existing eddy-current proximity probes on the plunger rods. Continuous monitoring was performed from the initial installation to final removal of each cylinder. Analysis of this high speed data along with long-term trends led to several conclusions regarding the design and operation of the Hyper cylinder. Testing also revealed various unusual events that can be further studied to better understand some of the unique behaviors that take place in the highly complex cylinder design of Hyper compressors.
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Kundu, Olyvia, Samrat Dutta, and Swagat Kumar. "Deep-Pack: A Vision-Based 2D Online Bin Packing Algorithm with Deep Reinforcement Learning." In 2019 28th IEEE International Conference on Robot and Human Interactive Communication (RO-MAN). IEEE, 2019. http://dx.doi.org/10.1109/ro-man46459.2019.8956393.

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Yancey, R. N., and G. Y. Baaklini. "Computed Tomography Evaluation of Metal-Matrix Composites for Aeropropulsion Engine Applications." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-004.

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Computed tomography (CT) is a powerful evaluation tool for advanced propulsion engine materials and components. CT uses X-rays to nondestructively produce images of 2-D slices or planes through an object. This paper will present data from CT investigations of metal-matrix composite (MMC) ring, rod, and coupon structures. Moderate resolution CT data identified density variations within reinforced sections which was correlated with fiber packing densities. Also, some composite lay-up features were also imaged. High-resolution CT data provided information on fiber spacing and distribution. Correlation with other NDE techniques and destructive analysis was good. CT proved to provide valuable information on the internal state of these metal-matrix composite components. Use of CT during process development of MMC’s and the components made from MMC’s is encouraged given the results of this study.
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Hirsh, Andrew D., Todd D. Lillian, and N. C. Perkins. "A Model for Highly Strained DNA in a Cavity." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48711.

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Анотація:
A single DNA molecule is a long and flexible biopolymer that contains the genetic code. Building upon the discovery of the iconic double helix over 50 years ago, subsequent studies have emphasized how its biological function is related to the mechanical properties of the molecule. A remarkable system which high-lights the role of DNA bending and twisting is the packing and ejection of DNA into and from viral capsids. A recent 3D reconstruction of bacteriophage φ29 reveals a novel toroidal structure thought to be 30–40 bp of highly bent/twisted DNA contained in a small cavity below the capsid. Here, we extend an elastic rod model for DNA to enable simulation of the toroid as it is compacted and subsequently ejected from a small volume. We compute biologically-realistic forces required to form the toroid and predict ejection times of several nanoseconds.
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