Filters








122,435 Hits in 5.6 sec

A Real-time Materialized View Approach for Analytic Flows in Hybrid Cloud Environments

Weiping Qu, Stefan Dessloch
2014 Datenbank-Spektrum  
Newly emerging hybrid analytic flows have been becoming attractive which consist of a set of extracttransform-load (ETL) jobs together with analytic jobs running over multiple platforms with different  ...  Besides, by picking up the most suitable platform for accommodating views, for example, materializing and maintaining intermediate results of Hadoop jobs in relational databases, better performance has  ...  The challenge of optimizing analytic flows spanning multiple platforms (referred to as hybrid flows) has already been addressed in [3] .  ... 
doi:10.1007/s13222-014-0155-0 fatcat:innxetqcpbfufenyvgl5y3jype

A Hybrid Analytical/Numerical Model for the Characterization of Preferential Flow Path with Non-Darcy Flow

Sen Wang, Qihong Feng, Xiaodong Han, Stephen J. Johnson
2013 PLoS ONE  
Citation: Wang S, Feng Q, Han X (2013) A Hybrid Analytical/Numerical Model for the Characterization of Preferential Flow Path with Non-Darcy Flow. PLoS ONE 8(12): e83536.  ...  With the objective of characterizing the preferential path with non-Darcy flow, a hybrid analytical/numerical model has been developed to investigate the pressure transient response, which dynamically  ...  This work establishes a hybrid analytical/numerical model for analyzing the pressure transient response of the preferential path with non-Darcy flow.  ... 
doi:10.1371/journal.pone.0083536 pmid:24386224 pmcid:PMC3875456 fatcat:uol77nlahvgpxhie4lpaz2nysq

A Hybrid Analytics Paradigm Combining Physics-Based Modeling and Data-Driven Modeling to Accelerate Incompressible Flow Solvers

Sk. Rahman, Adil Rasheed, Omer San
2018 Fluids  
In this study, we propose a hybrid analytics procedure combining a data-driven approach with a physics-based simulation technique to accelerate the computation of incompressible flows.  ...  Since the time integration of the advection–diffusion equation part of the physics-based model is computationally inexpensive in a typical incompressible flow solver, it is retained in the full order space  ...  Acknowledgments: The computing for this project was performed by using resources from the OSU's High Performance Computing Center. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/fluids3030050 fatcat:6dresr7elbc5zdnapkatfukjqm

Analytic Simulation for Magnetohydrodynamic Unsteady Buongiorno Model Hybrid Nanofluid Flow over Stretching

Muhammad Jawad, Salah Boulaaras, Niaz Ali Shah, Rashid Jan, Sulima Ahmed Zubair
2022 Advances in Mathematical Physics  
Hybrid nanofluid (Al2O3-Cu/H2O) flows with magnetohydrodynamic and heat source or sink. Brownian motion and thermophoresis were incorporated using the Buongiorno model.  ...  It has been noticed that the temperature profile increases with thermal radiation. For increasing values of Lewis number, the concentration of hybrid nanoparticles is considerably lowered.  ...  Nanofluid flow, in particular, is long familiar for its high heat conveyance when equated to regular fluid. The hybrid nanofluid is applied to raise it even further.  ... 
doi:10.1155/2022/6423730 doaj:c6805c9adb464c028012cb61de8feee7 fatcat:4wpvm6cyxfepfck7onzewbzdfm

A hybrid analytical-numerical method for solving water flow equations in root hydraulic architectures

Félicien Meunier, Xavier Draye, Jan Vanderborght, Mathieu Javaux, Valentin Couvreur
2017 Applied Mathematical Modelling  
The method combines analytical solutions of water flow within the segmented zones with the numerical solution of flow connectivity for the whole root system.  ...  It is based on the extension of the water flow equation analytical resolution of Landsberg and Fowkes for single roots.  ...  Acknowledgments F.M. is supported by "Fonds National de la Recherche Scientifique" of Belgium (FNRS) as Research Fellow and is grateful to this fund for its support.  ... 
doi:10.1016/j.apm.2017.08.011 fatcat:rybesntszbfutj5ytplv5dnqwq

Pepsin Immobilized on High-Strength Hybrid Particles for Continuous Flow Online Digestion at 10 000 psi

Joomi Ahn, Moon Chul Jung, Kevin Wyndham, Ying Qing Yu, John R. Engen
2012 Analytical Chemistry  
Pepsin was immobilized on ethyl-bridged hybrid (BEH) particles and digestion performance was evaluated in a completely online format, with the specific intent of using the particles for hydrogen deuterium  ...  Online digestion was performed under isobaric conditions with continuous solvent flow, in contrast to other approaches where the pressure or flow is cycled.  ...  Walsh and Christopher Morgan for helpful discussions.  ... 
doi:10.1021/ac301749h pmid:22856522 pmcid:PMC3424325 fatcat:i6xhg5tyvbdlxmfdme2fo23mt4

Experimental investigation and hybrid numerical analytical hydraulic mechanical simulation of supercritical CO 2 flowing through a natural fracture in caprock

Claire McCraw, Katriona Edlmann, Johannes Miocic, Stuart Gilfillan, R. Stuart Haszeldine, Christopher I. McDermott
2016 International Journal of Greenhouse Gas Control  
The results are modelled through the further development of a hybrid numerical analytical approach to fluid flow through a discrete fracture, implemented in the open source code OpenGeoSys.  ...  The work indicates that through the statistical approximation of the fracture surface and combination of the application of standard nonlinear flow models and analytical mechanical solutions, the key features  ...  Acknowledgements The research leading to these results was conducted within the context of the European  ... 
doi:10.1016/j.ijggc.2016.01.002 fatcat:wcblqqgebnf47j5fa33e3oncq4

A Multi-Objective Optimization Model for the Resilience and Sustainable Supply Chain: A Case Study

Mohammad Reza zamanian, Ehsan Sadeh, Zeinolabedin Amini Sabegh, Reza Ehtesham Rasi
2020 International Journal of Supply and Operations Management  
To the best of our knowledge, this is the first study that presents a multi-objective optimization model for the resilience and sustainable supply chain.  ...  The aim of this paper is to optimize a case study using a multi-objective and multi-period model considering maximize the total revenue, minimize the economic and environmental costs, minimize the penalty  ...  Acknowledgments Authors would like to express their gratitude to National Iranian Gas Company for its valuable cooperation.  ... 
doi:10.22034/ijsom.2020.1.4 doaj:2b28787492bb454a95447db86815b1e0 fatcat:l2xas7wn6bbovps5qhiuhxtoey

Optimal Maintenance for Degrading Assets in the Context of Asset Fleets-A Case Study

Frederik Schulze Spüntrup, Giancarlo Dalle Ave, Lars Imsland, Iiro Harjunkoski
2020 Frontiers in Applied Mathematics and Statistics  
The paper demonstrates the benefits of optimal (long-term) schedules for maintenance, but indicate at the same time the need for efficient algorithms in the context of large asset fleets, in contrast to  ...  This paper introduces a case study to the academic community that represents the problem of optimal decision-making in the context of large asset fleets.  ...  Reference 14 optimize the power generation by applying parameter estimation via Kalman filtering combined with a hybrid dynamic model.  ... 
doi:10.3389/fams.2020.528181 fatcat:g7gj6mfigfhllnh2osehagerye

Optimization of an Industrial Sector Regulated by an International Treaty. The Case for Transportation of Perishable Foodstuff

Juan P. Martínez-Val, Alberto Ramos
2021 Entropy  
So, optimizing those prescriptions will generate a general optimization trend in this sector.  ...  In this paper, a coherent analysis on these subjects is presented, and a new coefficient is proposed for qualifying ATP units, and some new tests are also proposed for measuring that coefficient in an  ...  We will restrict ourselves to the planar case, which has analytical solutions that can be used to guide the time dependent studies needed to characterise the physics of the problem under study.  ... 
doi:10.3390/e23010109 pmid:33467598 fatcat:brdd7fdhkfcmtmbkwszgno3534

SMART Computational Solutions for the Optimization of Selected Technology Processes as An Innovation and Progress in Improving Energy Efficiency of Smart Cities—A Case Study

Krzysztof Gaska, Agnieszka Generowicz
2020 Energies  
The paper presents advanced computational solutions for selected sectors in the context of the optimization of technology processes as an innovation and progress in improving energy efficiency of smart  ...  process and objects of distributed network systems (smart water grid, smart sewage system, smart waste management system) and solving problems of optimal control for smart dynamic objects with logical  ...  Acknowledgments: The authors wish to thank the employees of Water Company in Nowy Sącz (Poland) and ENCO Company for the authorization to conduct the tests and for their assistance in performing them and  ... 
doi:10.3390/en13133338 fatcat:wyuqv2v5ovfvfny26igxtfbd5e

Optimal partitioners and end-case placers for standard-cell layout

A. E. Caldwell, A. B. Kahng, I. L. Markov
1999 Proceedings of the 1999 international symposium on Physical design - ISPD '99  
We study alternatives to classic Fiduccia-Mattheyses (FM)-based partitioning algorithms in the context of end-case processing for top-down standard-cell placement.  ...  While the divide step in the top-down divide and conquer is usually performed heuristically, we observe that optimal solutions can be found for many sufficiently small partitioning instances.  ...  Overall, invoking end-case optimal bipartitioners for instance sizes of 30-35 or less and end-case optimal placers for instance sizes of seven or less leads to good results. V.  ... 
doi:10.1145/299996.300032 dblp:conf/ispd/CaldwellKM99 fatcat:gfeopxdkabexblytbrbptbqgii

Systems Dynamics Modeling of Pandemic Influenza for Strategic Policy Development: a Simulation-Based Analysis of the COVID-19 Case

Charlle Sy, Phoebe Mae Ching, Jayne Lois San Juan, Ezekiel Bernardo, Angelimarie Miguel, Andres Philip Mayol, Alvin Culaba, Aristotle Ubando, Jose Edgar Mutuc
2021 Process Integration and Optimization for Sustainability  
The system dynamics modeling approach captures the relationships, feedbacks, and delays in such a system, revealing meaningful insights on the dynamics of several response strategies.  ...  The novel coronavirus disease 2019 (COVID-19) is a truly wicked problem which has remained a stubborn issue plaguing multiple countries worldwide.  ...  for (a) deaths, (b) hospital strain, and (c) public health strain Process Integr Optim Sustain and a larger time delay.  ... 
doi:10.1007/s41660-021-00156-9 fatcat:li6mhebb4nctjlwhfjredkwowe

Economic Evaluation of Renewable Energy Systems for the Optimal Planning and Design in Korea – A Case Study

Mo Chung, Ki-Yeol Shin, Dae-Seong Jeoune, Shin-Yeol Park, Wu-Jong Lee, Yong-Hoon Im
2018 Journal of Sustainable Development of Energy, Water and Environment Systems  
The developed program can provide useful information for investment decisions through the optimal design of facility capacity and economic analysis when investing in renewable energy supply facilities.  ...  In this study, an engineering economics software was developed to find the optimum design of renewable energy systems in micro-grid, off-grid, and on-grid cases.  ...  The simplified mathematical definition of the analytical model for each facility is described below. Photovoltaic (PV).  ... 
doi:10.13044/j.sdewes.d6.0216 fatcat:hgrzjxl75reenaia53fzybtu74

Techno-Economic Optimization Analysis of an Autonomous Photovoltaic Power System for a Shoreline Electrode Station of HVDC Link: Case Study of an Electrode Station on the Small Island of Stachtoroi for the Attica–Crete Interconnection

Panagiota M. Deligianni, George J. Tsekouras, Costas D. Tsirekis, Vassiliki T. Kontargyri, Fotis D. Kanellos, Panagiotis A. Kontaxis
2020 Energies  
The station power and energy consumption are analytically determined taking into consideration the daily temperature variation annually.  ...  Afterwards, a techno-economic optimization process based on a sensitivity analysis is formed modifying the size/power of photovoltaic panels (PVs), the type and the energy capacity of the batteries taking  ...  Acknowledgments: The authors would like to thank the H-IPTSO for the meteorological and economic data availability.  ... 
doi:10.3390/en13215550 fatcat:rb2vxs2ks5byncfhlenkg3q2tu
« Previous Showing results 1 — 15 out of 122,435 results