Littérature scientifique sur le sujet « Heterogeneous phase »

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Articles de revues sur le sujet "Heterogeneous phase"

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Khoury, J., Peter D. Gianino et Charles L. Woods. « Phase-restricted heterogeneous correlation ». Optics Letters 25, no 6 (15 mars 2000) : 396. http://dx.doi.org/10.1364/ol.25.000396.

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Khan, Haris Mahmood, Tanveer Iqbal, Saima Yasin, Muhammad Irfan, Muhammad Mujtaba Abbas, Ibham Veza, Manzoore Elahi M. Soudagar, Anas Abdelrahman et Md Abul Kalam. « Heterogeneous Catalyzed Biodiesel Production Using Cosolvent : A Mini Review ». Sustainability 14, no 9 (22 avril 2022) : 5062. http://dx.doi.org/10.3390/su14095062.

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Biodiesel is gaining recognition as a good replacement for typical diesel owing to its renewability, sustainability, and eco-friendly nature. Transesterification is the leading route for biodiesel generation, which occurs during homogeneous/heterogeneous/enzymatic catalysis. Besides this, the usage of heterogeneous catalysts is considered more advantageous over homogeneous catalysts due to the easy catalyst recovery. Consequently, numerous heterogeneous catalysts have been synthesized from multiple sources with the intention of making the manufacturing process more efficient and cost-effective. Alongside this, numerous researchers have attempted to improve the biodiesel yield using heterogeneous catalysts by introducing cosolvents, such that phase limitation between oil and alcohol can be minimized. This short review is aimed at examining the investigations performed to date on heterogeneously catalyzed biodiesel generation in the presence of different cosolvents. It encompasses the techniques for heterogeneous catalyst synthesis, reported in the literature available for heterogeneous catalyzed biodiesel generation using cosolvents and their effects. It also suggests that the application of cosolvent in heterogeneously catalyzed three-phase systems substantially reduces the mass transfer limitation between alcohol and oil phases, which leads to enhancements in biodiesel yield along with reductions in values of optimized parameters, with catalyst weight ranges from 1 to 15 wt. %, and alcohol/oil ratio ranges from 5.5 to 20. The reaction time for getting the maximum conversion ranges from 10 to 600 min in the presence of different cosolvents. Alongside this, most of the time, the biodiesel yield remained above 90% in the presence of cosolvents.
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Alisherovna, Abidova Mamurakhon. « THE STUDY OF HETEROGENEOUS SYSTEMS AND METHODS FOR THEIR SEPARATION ». International Journal of Advance Scientific Research 03, no 04 (1 avril 2023) : 90–96. http://dx.doi.org/10.37547/ijasr-03-04-13.

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The article shows the importance of methods for separating inhomogeneous systems, classified depending on the size of dispersed particles, the difference in densities of continuous and dispersed phases, as well as the viscosity of the continuous phase. The main methods of separation are considered: sedimentation, filtration, centrifugation, wet separation.
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Bourouina, Amine, Valérie Meille et Claude de Bellefon. « About Solid Phase vs. Liquid Phase in Suzuki-Miyaura Reaction ». Catalysts 9, no 1 (9 janvier 2019) : 60. http://dx.doi.org/10.3390/catal9010060.

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A critical review of conclusions about the putative heterogeneous mechanism in the Suzuki-Miyaura coupling by supported Pd solids is reported. In the first section, the turnover frequencies (TOF) of 20 well-established homogeneous catalysts are shown to be in the range 200 to 1,000,000,000 h − 1 . The evidences used to prove a heterogeneous mechanism are discussed and another interpretation is proposed, hypothesizing that only the leached species are responsible for the catalytic reaction, even at ppb levels. Considering more than 40 published catalytic systems for which liquid phase Pd content have been reported, activities have been computed based on leached Pd concentrations and are shown to be in the range TOF 150 to 70,000,000 h − 1 . Such values are compatible with those found for the well-established homogeneous catalysts which questions the validity of the conclusions raised by many papers about the heterogeneous (solid) nature of Suzuki-Miyaura catalysis. Last, a tentative methodology is proposed which involves the rational use of well-known tests (hot-filtration test, mercury test…) to help to discriminate between homogeneous and heterogeneous mechanisms.
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Zamalyutin, V. V., A. V. Ryabov, E. A. Solomakha, E. A. Katsman, V. R. Flid, O. Yu Tkachenko et M. A. Shpinyova. « Liquid-phase heterogeneous hydrogenation of dicyclopentadiene ». Russian Chemical Bulletin 71, no 6 (juin 2022) : 1204–8. http://dx.doi.org/10.1007/s11172-022-3521-3.

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Saleheen, Mohammad, et Andreas Heyden. « Liquid-Phase Modeling in Heterogeneous Catalysis ». ACS Catalysis 8, no 3 (7 février 2018) : 2188–94. http://dx.doi.org/10.1021/acscatal.7b04367.

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Negrón-Mendoza, A., S. Ramos-Bernal, E. Cruz et J. M. Juárez. « Radiolysis of HCN in heterogeneous phase ». Radiation Physics and Chemistry 61, no 3-6 (juin 2001) : 771–72. http://dx.doi.org/10.1016/s0969-806x(01)00400-5.

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COMBEAU, H., et J. LACAZE. « Numerical simulation of heterogeneous phase transformations ». Le Journal de Physique IV 03, no C7 (novembre 1993) : C7–1157—C7–1162. http://dx.doi.org/10.1051/jp4:19937180.

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Bauer, Barry J. « Equilibrium phase compositions of heterogeneous copolymers ». Polymer Engineering and Science 25, no 17 (décembre 1985) : 1081–87. http://dx.doi.org/10.1002/pen.760251706.

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Will, Heiko, Peter Scholz et Bernd Ondruschka. « Microwave-Assisted Heterogeneous Gas-Phase Catalysis ». Chemical Engineering & ; Technology 27, no 2 (5 février 2004) : 113–22. http://dx.doi.org/10.1002/ceat.200401865.

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Thèses sur le sujet "Heterogeneous phase"

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Khan, Shahid Amin. « Phase transformations in heterogeneous steels ». Thesis, University of Cambridge, 1990. https://www.repository.cam.ac.uk/handle/1810/221888.

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Khong, Teck Meng. « Heterogeneous gas phase reactions for the production of chemically bonded phases ». Thesis, Birkbeck (University of London), 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246077.

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Mirza, Amin Ruhul. « Developments in supported aqueous-phase catalysis ». Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311179.

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Inceesungvorn, B. « Silver based heterogeneous catalysts for selective gas phase reactions ». Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517231.

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Franc, Jacques. « Two-phase flow properties upscaling in heterogeneous porous media ». Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/21684/1/FRANC_Jacques.pdf.

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The groundwater specialists and the reservoir engineers share the same interest in simulating multiphase flow in soil with heterogeneous intrinsic properties. They also both face the challenge of going from a well-modeled micrometer scale to the reservoir scale with a controlled loss of information. This upscaling process is indeed worthy to make simulation over an entire reservoir manageable and stochastically repeatable. Two upscaling steps can be defined: one from the micrometer scale to the Darcy scale, and another from the Darcy scale to the reservoir scale. In this thesis, a new second upscaling multiscale algorithm Finite Volume Mixed Hybrid Multiscale Methods (Fv-MHMM) is investigated. Extension to a two-phase flow system is done by weakly and sequentially coupling saturation and pressure via IMPES-like method.
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Seeley, Lane Howard. « Heterogeneous nucleation of ice from supercooled water / ». Thesis, Connect to this title online ; UW restricted, 2001. http://hdl.handle.net/1773/9783.

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Ferguson, Robert James. « Seismic imaging in heterogeneous anisotropic media by nonstationary phase shift ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/NQ49493.pdf.

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Deshpande, Kiran B. « Study of transport limited heterogeneous reaction in the dispersed phase ». Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419600.

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Young, Matthew J. « Studying liquid-phase heterogeneous catalysis using the atomic force microscope ». Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32852.

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Doctor of Philosophy
Department of Chemical Engineering
Peter H. Pfromm
Characterization of the interactions of hydrogen with catalytic metal surfaces and the mass transfer processes involved in heterogeneous catalysis are important for catalyst development. Although a range of technologies for studying catalytic surfaces exists, much of it relies on high-vacuum conditions that preclude in-situ research. In contrast, atomic force microscopy (AFM) provides an opportunity for direct observation of surfaces under or near actual reaction conditions. Tapping-mode AFM was explored here because it expands AFM beyond the usual topographic information toward speciation and other more subtle surface information. This work describes using phase-angle data from tapping-mode AFM to follow the interactions of hydrogen with palladium. Both gas-solid and liquid-solid interfaces were studied. Real-time AFM phase-angle data allowed for the observation of multiphase mass transfer to and from the surface of palladium at atmospheric pressure and room temperature without the need for complex sample preparation. The AFM observations were quantitatively benchmarked against and confirm mass transfer predictions based on bulk hydrogen diffusion estimates. Additionally, they support recent studies that demonstrate the existence of multiple hydrogen states during interactions with palladium surfaces.
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French, Christopher. « Transparent heterogeneous terrestrial optical communication networks with phase modulated signals ». Thesis, Aston University, 2012. http://publications.aston.ac.uk/19237/.

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This thesis presents a large scale numerical investigation of heterogeneous terrestrial optical communications systems and the upgrade of fourth generation terrestrial core to metro legacy interconnects to fifth generation transmission system technologies. Retrofitting (without changing infrastructure) is considered for commercial applications. ROADM are crucial enabling components for future core network developments however their re-routing ability means signals can be switched mid-link onto sub-optimally configured paths which raises new challenges in network management. System performance is determined by a trade-off between nonlinear impairments and noise, where the nonlinear signal distortions depend critically on deployed dispersion maps. This thesis presents a comprehensive numerical investigation into the implementation of phase modulated signals in transparent reconfigurable wavelength division multiplexed fibre optic communication terrestrial heterogeneous networks. A key issue during system upgrades is whether differential phase encoded modulation formats are compatible with the cost optimised dispersion schemes employed in current 10 Gb/s systems. We explore how robust transmission is to inevitable variations in the dispersion mapping and how large the margins are when suboptimal dispersion management is applied. We show that a DPSK transmission system is not drastically affected by reconfiguration from periodic dispersion management to lumped dispersion mapping. A novel DPSK dispersion map optimisation methodology which reduces drastically the optimisation parameter space and the many ways to deploy dispersion maps is also presented. This alleviates strenuous computing requirements in optimisation calculations. This thesis provides a very efficient and robust way to identify high performing lumped dispersion compensating schemes for use in heterogeneous RZ-DPSK terrestrial meshed networks with ROADMs. A modified search algorithm which further reduces this number of configuration combinations is also presented. The results of an investigation of the feasibility of detouring signals locally in multi-path heterogeneous ring networks is also presented.
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Livres sur le sujet "Heterogeneous phase"

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Warneck, Peter, dir. Heterogeneous and Liquid Phase Processes. Berlin, Heidelberg : Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61445-3.

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Predel, Bruno, Michael Hoch et Monte Pool. Phase Diagrams and Heterogeneous Equilibria. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09276-7.

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Clerici, Mario G., et Oxana A. Kholdeeva, dir. Liquid Phase Oxidation via Heterogeneous Catalysis. Hoboken, New Jersey : John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118356760.

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Predel, Bruno. Phase Diagrams and Heterogeneous Equilibria : A Practical Introduction. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004.

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J, Grinfel'd M., dir. Thermodynamic methods in the theory of heterogeneous systems. Harlow, Essex, England : Longman Scientific & Technical, 1991.

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Liquid phase oxidation via heterogeneous catalysis : Organic synthesis and industrial applications. Hoboken, New Jersey : John Wiley & Sons, Incorporated, 2013.

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Boy, Cornils, et Herrmann W. A, dir. Aqueous-phase organometallic catalysis : Concepts and applications. 2e éd. Weinheim : Wiley-VCH, 2004.

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Peter, Warneck, dir. Heterogeneous and liquid phase processes : Laboratory studies related to aerosols and clouds. Berlin : Springer, 1996.

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1939-, King D. A., et Woodruff D. P, dir. Phase transitions and adsorbate restructuring at metal surfaces. Amsterdam [The Netherlands] : Elsevier, 1994.

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A, Moscow Jeffrey, et National Cancer Institute (U.S.). Office of Cancer Communications, dir. Heterogeneous expression in human tumors of anionic glutathione-S-transferase, a phase II enzyme associated with multidrug resistance. [Bethesda, Md.] : National Cancer Institute, Office of Cancer Communications, 1988.

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Chapitres de livres sur le sujet "Heterogeneous phase"

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Topolov, Vitaly Yu. « Two-Phase States ». Dans Heterogeneous Ferroelectric Solid Solutions, 23–64. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22483-6_2.

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Topolov, Vitaly Yu. « Three-Phase States ». Dans Heterogeneous Ferroelectric Solid Solutions, 97–117. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22483-6_4.

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Topolov, Vitaly Yu. « Two-Phase States ». Dans Heterogeneous Ferroelectric Solid Solutions, 25–67. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75520-5_2.

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Topolov, Vitaly Yu. « Three-Phase States ». Dans Heterogeneous Ferroelectric Solid Solutions, 99–120. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75520-5_4.

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Umantsev, Alexander. « Heterogeneous Equilibrium Systems ». Dans Field Theoretic Method in Phase Transformations, 37–90. New York, NY : Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1487-2_3.

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Umantsev, Alexander. « Heterogeneous Equilibrium Systems ». Dans Field Theoretic Method in Phase Transformations, 171–227. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-29605-5_9.

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Topolov, Vitaly Yu. « Phase Coexistence Under Electric Field ». Dans Heterogeneous Ferroelectric Solid Solutions, 65–96. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22483-6_3.

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Topolov, Vitaly Yu. « Phase Coexistence Under Electric Field ». Dans Heterogeneous Ferroelectric Solid Solutions, 69–98. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75520-5_3.

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Umantsev, Alexander. « Evolution of Heterogeneous Systems ». Dans Field Theoretic Method in Phase Transformations, 101–19. New York, NY : Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1487-2_5.

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Umantsev, Alexander. « Evolution of Heterogeneous Systems ». Dans Field Theoretic Method in Phase Transformations, 243–67. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-29605-5_11.

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Actes de conférences sur le sujet "Heterogeneous phase"

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SHELDON, R. A. « HETEROGENEOUS CATALYSIS OF LIQUID PHASE OXIDATIONS ». Dans Proceedings of the NIOK (Netherlands Institute for Catalysis Research) Course on Catalytic Oxidation. WORLD SCIENTIFIC, 1995. http://dx.doi.org/10.1142/9789814503884_0009.

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MILLS, P. L., M. P. HAROLD et J. J. LEROU. « INDUSTRIAL HETEROGENEOUS GAS-PHASE OXIDATION PROCESSES ». Dans Proceedings of the NIOK (Netherlands Institute for Catalysis Research) Course on Catalytic Oxidation. WORLD SCIENTIFIC, 1995. http://dx.doi.org/10.1142/9789814503884_0013.

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Paterson, Lincoln, Ji-Youn Lee et W. Val Pinczewski. « Three-Phase Relative Permeability in Heterogeneous Formations ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1997. http://dx.doi.org/10.2118/38882-ms.

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Ciorba, F. M., T. Andronikos, I. Riakiotakis, A. T. Chronopoulos et G. Papakonstantinou. « Dynamic multi phase scheduling for heterogeneous clusters ». Dans Proceedings 20th IEEE International Parallel & Distributed Processing Symposium. IEEE, 2006. http://dx.doi.org/10.1109/ipdps.2006.1639308.

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Liu, Mengyang, Xiaodong Mu et Xiangchen He. « Heterogeneous image matching based on phase consistency ». Dans 2021 IEEE Conference on Telecommunications, Optics and Computer Science (TOCS). IEEE, 2021. http://dx.doi.org/10.1109/tocs53301.2021.9689044.

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Jooya, A. Z., et M. Analoui. « Program phase detection in heterogeneous multi-core processors ». Dans 2009 14th International CSI Computer Conference (CSICC 2009) (Postponed from July 2009). IEEE, 2009. http://dx.doi.org/10.1109/csicc.2009.5349430.

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Pobiedina, Valentyna, et Andrey Yakunov. « Speckle decorrelation study of phase heterogeneous liquid medium ». Dans SPIE Photonics Europe, sous la direction de Christophe Gorecki, Anand K. Asundi et Wolfgang Osten. SPIE, 2016. http://dx.doi.org/10.1117/12.2223723.

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Dean, Bruce H., et Thomas P. Zielinski. « Heterogeneous Processing Architecture for Phase-Retrieval Wavefront Sensing ». Dans Frontiers in Optics. Washington, D.C. : OSA, 2012. http://dx.doi.org/10.1364/fio.2012.fw5a.3.

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Ao, Weng Chon, Shin-Ming Cheng et Kwang-Cheng Chen. « Phase Transition Diagram for Underlay Heterogeneous Cognitive Radio Networks ». Dans GLOBECOM 2010 - 2010 IEEE Global Communications Conference. IEEE, 2010. http://dx.doi.org/10.1109/glocom.2010.5684228.

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Padmanabha, Shruti, Andrew Lukefahr, Reetuparna Das et Scott Mahlke. « Trace based phase prediction for tightly-coupled heterogeneous cores ». Dans the 46th Annual IEEE/ACM International Symposium. New York, New York, USA : ACM Press, 2013. http://dx.doi.org/10.1145/2540708.2540746.

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Rapports d'organisations sur le sujet "Heterogeneous phase"

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Springer, Harry Keo. Meso-Scale Modeling of Spall in a Heterogeneous Two-Phase Material. Office of Scientific and Technical Information (OSTI), juillet 2008. http://dx.doi.org/10.2172/945797.

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Khan, Rishi, et Fredrik Kjolstad. SBIR Phase I Final Report, TACO : Distributed and Heterogeneous Sparse Compiler. Office of Scientific and Technical Information (OSTI), décembre 2021. http://dx.doi.org/10.2172/1835281.

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Abe Lederman. DOE SBIR Phase II Final Report : Distributed Relevance Ranking in Heterogeneous Document Collections. Office of Scientific and Technical Information (OSTI), janvier 2007. http://dx.doi.org/10.2172/896967.

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Morkun, Vladimir S., Natalia V. Morkun et Andrey V. Pikilnyak. Augmented reality as a tool for visualization of ultrasound propagation in heterogeneous media based on the k-space method. [б. в.], février 2020. http://dx.doi.org/10.31812/123456789/3757.

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For programming the AR tools, interactive objects and creating the markers, the method of fiber spaces (k-space) for modeling of ultrasonic wave propagation in an inhomogeneous medium using coarse grids, with maintaining the required accuracy was used. The algorithm and tools of augmented reality were introduced into the adaptive control system of the pulp gas phase in the iron ore flotation process using a control action on the basis of high-energy ultrasound dynamic effects generated by ultrasonic phased arrays. The tools of augmented reality based on k-space methods allow to facilitate wider adoption of ultrasound technology and visualize the ultra-sound propagation in heterogeneous media by providing a specific correspondence between the ultrasound data acquired in real- time and a sufficiently detailed augmented 3D scene. The tools of augmented reality allow seeing the field of ultrasound propagation, its characteristics, as well as the effect of the dynamic effects of ultrasound on the change in the gas phase during the flotation process.
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Fernandez, Juan Carlos. Laser-Generated Ion Beams for Isochoric Heating to Study Plasma-Phase Mix at Heterogeneous Interfaces. Office of Scientific and Technical Information (OSTI), janvier 2016. http://dx.doi.org/10.2172/1237272.

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Garrett, Bruce C. The Calculation of Thermal Rate Constants for Gas-Phase and Heterogeneous Reactions in Combustion Processes. Fort Belvoir, VA : Defense Technical Information Center, juillet 1987. http://dx.doi.org/10.21236/ada184435.

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Greenbaum, Steven G. Lithium Ion Transport Across and Between Phase Boundaries in Heterogeneous Polymer Electrolytes, Based on PVdF. Fort Belvoir, VA : Defense Technical Information Center, février 1998. http://dx.doi.org/10.21236/ada344887.

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Coltrin, M. E., R. J. Kee, F. M. Rupley et E. Meeks. SURFACE CHEMKIN-III : A Fortran package for analyzing heterogeneous chemical kinetics at a solid-surface - gas-phase interface. Office of Scientific and Technical Information (OSTI), mai 1996. http://dx.doi.org/10.2172/481906.

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Bernstein, Elliot R. Toward an Atomic Level Understanding of Heterogeneous Reaction Rate Enhancement Employing Gas Phase Metal and Metal Oxide Clusters. Fort Belvoir, VA : Defense Technical Information Center, novembre 2010. http://dx.doi.org/10.21236/ada562922.

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Coltrin, M. E., R. J. Kee et F. M. Rupley. Surface CHEMKIN (Version 4. 0) : A Fortran package for analyzing heterogeneous chemical kinetics at a solid-surface---gas-phase interface. Office of Scientific and Technical Information (OSTI), juillet 1991. http://dx.doi.org/10.2172/6128661.

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