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Problem formulation using APL

H. G. Kolsky
1969 IBM Systems Journal  
Thus, the model assumes simultaneous input /output and compute. oo NO. 3 + 1969 PROBLEM FORMULATION 21 APL advection formula Table 2 APL storage-handling and control program CONTROL VY SEQ1 {1] ILOAD [  ...  IV;J+IBL1i(1;) L+i+L INPUT V_ LOADS IBL+SMC3L33] IBL1+«SM1( 313] TCIP;3;)+IBL(13;3] WICIP;;)+IBL(2;3) UCIP;;)+ZBL(3;3) VLIP;3;J+IBLC4;;3] PSC IP; 1+IBL1(1;1 OUTPUT VY STORES OBL(13;)+WTCIV;;3) OBL(2;3;  ... 
doi:10.1147/sj.83.0204 fatcat:ft4tszfxdzbgvpbsi27byqkkqa

Some problems in the compartmental analysis of calcium metabolism

F Bronner
1967 Transactions of the New York Academy of Sciences  
and of the other body fluids is constant, we arrive at a symbolic repre¬ sentation of a two-compartment system.  ...  , remains constant with increasing input.  ... 
pmid:5233750 fatcat:a6zny5rbxvbd5ncruvdaum53im

Standardized Non-Intrusive Reduced Order Modeling Using Different Regression Models With Application to Complex Flow Problems [article]

Artūrs Bērziņš, Jan Helmig, Fabian Key, Stefanie Elgeti
2021 arXiv   pre-print
Modeling the flow through a TSE requires non-linear material models and coupling with the heat equation alongside intricate mesh deformations, which is a comparatively complex scenario.  ...  We focus on the well-established proper orthogonal decomposition (POD) with regression albeit we introduce two adaptations: standardizing both the data and the error measures as well as -- inspired by  ...  A Newtonian fluid model is used with unit density.  ... 
arXiv:2006.13706v2 fatcat:bxrcqw37dfezhcwusmbziq5cmm

Diffusion local time storage

M. Kozlova, P. Salminen
2004 Stochastic Processes and their Applications  
In this paper we study a storage process or a liquid queue in which the input process is the local time of a positively recurrent stationary diffusion in stationary state and the potential output takes  ...  place with a constant deterministic rate.  ...  Acknowledgements The authors thank Ilkka Norros for a short but stimulating discussion, and Bruno Bassan and Fabio Spizzichino for pointing out the connection of the class K and the Schur-constant functions  ... 
doi:10.1016/j.spa.2004.06.005 fatcat:6rudcnzh3nbf7g5oazbqwjm77a

Thermal energy storage technologies and systems for concentrating solar power plants

Sarada Kuravi, Jamie Trahan, D. Yogi Goswami, Muhammad M. Rahman, Elias K. Stefanakos
2013 Progress in Energy and Combustion Science  
This paper discusses the thermal energy storage system designs presented in the literature along with thermal and exergy efficiency analyses of various thermal energy storage systems integrated into the  ...  Thermal energy storage forms a key component of a power plant for improvement of its dispatchability.  ...  Acknowledgements This work was done as part of projects funded by USDOE (DE-EE0003590) and the Florida Energy Systems Consortium (FESC).  ... 
doi:10.1016/j.pecs.2013.02.001 fatcat:fbsb7tblgzb2vf5h6wqakkatyi

Thermo-electrochemical modeling of ammonia-fueled solid oxide fuel cells considering ammonia thermal decomposition in the anode

Meng Ni
2011 International journal of hydrogen energy  
; (3) a 2D computational fluid dynamics (CFD) model that simulates the heat and mass transfer phenomena.  ...  A v a i l a b l e a t w w w . s c i e n c e d i r e c t . c o m j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / h e i n t e r n a t i o n a l j o u r n a l o f h y d r o  ...  Acknowledgments The author is indebted to the anonymous referees for their critical reviews and constructive comments/suggestions on the original manuscript.  ... 
doi:10.1016/j.ijhydene.2010.11.100 fatcat:42lw6qswjnhxxnng4w33hpfb24

Thermodynamic analysis of Stirling engines

T. FINKELSTEIN
1967 Journal of Spacecraft and Rockets  
Basic System A closed regenerative gas machine is a reversible heat engine which either converts part of an input of heat energy into an output of power, or alternatively uses an input of mechanical power  ...  The solution for the machine torques determines the mean power output or input and the fluctua- tions in power.  ... 
doi:10.2514/3.29049 fatcat:5vnew6qqfndxncgz5s6kk2zksu

Rigorous design of cyber-physical systems

Joseph Sifakis
2012 2012 International Conference on Embedded Computer Systems (SAMOS)  
Cyber-physical systems have developed into a very active research field, with a broad range of challenges and research directions going from requirements, to implementation and simulation, as well as validation  ...  We consider that cyber-physical system design flow involves the following three main steps: 1) cyber-physical systems modeling; 2) discretization for executability; and 3) simulation and implementation  ...  In addition to dataflow inputs and outputs, integrator nodes have a discrete event input start that initiates the integration with a given initial value.  ... 
doi:10.1109/samos.2012.6404193 dblp:conf/samos/Sifakis12 fatcat:pxm3b2jq7nh3jhk5tgx5yhi3yu

Simulation of integrated surface-water/ground-water flow and salinity for a coastal wetland and adjacent estuary

Christian Langevin, Eric Swain, Melinda Wolfert
2005 Journal of Hydrology  
The SWIFT2D surface-water flow and transport code, which solves the St Venant equations in two dimensions, was coupled with the SEAWAT variable-density ground-water code to represent hydrologic processes  ...  A sequentially coupled time-lagged approach was implemented, based on a variable-density form of Darcy's Law, to couple the surface and subsurface systems.  ...  The authors would also like to acknowledge the contributions of Aaron Higer in recognizing the importance of coastal wetland hydrology and supporting the development of robust and accurate simulation tools  ... 
doi:10.1016/j.jhydrol.2005.04.015 fatcat:ze4azbemlnamjgynvjgvwjjkvy

Metamodelling: Bond Graphs and Dynamic Systems [article]

Peter Gawthrop, Lorcan Smith
2022 Zenodo  
This is a 1996 textbook. With the increasing complexity of processes to be analysed, the modern control engineer often needs to develop a model of the system to be controlled.  ...  This book is organised in two parts, so that the reader may first understand the motivation and the basic concepts, and then have the proposed methodology illustrated by a variety of examples covering  ...  Applying the causality rules, with integral causality on stores, results in a model with two state variables p2 and p4 and a single input el .  ... 
doi:10.5281/zenodo.6998395 fatcat:guuwimd5tzd7xgviz4rb4xexcy

Two- and three-dimensional analysis of hypersonic nonequilibrium low-density flows

Roop N. Gupta
1996 Journal of thermophysics and heat transfer  
An alternate method for obtaining a three-dimensional viscous, nonequilibrium input shock shape is, therefore, suggested here.  ...  ., shock standoff dis- tance and its slope). Global iterations are repeated until the input and output shock shapes are converged. Other details of the solution procedure are provided in Ref. 13.  ... 
doi:10.2514/3.783 fatcat:priggvrrinhjbpks3ufwxlaefy

The Henry-Saltwater Intrusion Benchmark – Alternatives in Multiphysics Formulations and Solution Strategies

2016 International Journal of Multiphysics  
Up to now the problem has been taken up by software developers and modellers as a benchmark for codes simulating coupled flow and transport in porous media.  ...  We model the problem using Finite Elements, utilizing the primitive variables and the streamfunction approach, both with and without using the Oberbeck-Boussinesq assumption.  ...  Special thanks to Sven Friedel, COMSOL Multiphysics GmbH, Zurich, for a substantial pre-review.  ... 
doi:10.21152/1750-9548.10.1.21 fatcat:4zx2f7bombf2pm4ehdpnlaoagy

Metal hydride hydrogen compression: recent advances and future prospects

Volodymyr A. Yartys, Mykhaylo Lototskyy, Vladimir Linkov, David Grant, Alastair Stuart, Jon Eriksen, Roman Denys, Robert C. Bowman
2016 Applied Physics A: Materials Science & Processing  
The performances when boosting hydrogen pressure, along with two-and three-step compression units are analyzed.  ...  The paper includes also a theoretical modeling of a two-stage compressor aimed at both describing the performance of the experimentally studied systems, but, also, on their optimization and design of more  ...  ACKNOWLEDGEMENTS This work is a part of the activities within IEA Task 32 Hydrogen Based Energy Storage. We are grateful for the task coordinator Dr.  ... 
doi:10.1007/s00339-016-9863-7 fatcat:par4n63mjncynbtnz4xzf6hbjq

Experimental and Numerical Investigation of NO Oxidation on Pt/Al2O3- and NOx Storage on Pt/BaO/Al2O3-Catalysts

Sui Wan, Kevin Keller, Patrick Lott, Akash Bhimrao Shirsath, Steffen Tischer, Thomas Häber, Rainer Suntz, Olaf Deutschmann
2022 Catalysis science & technology  
Planar laser-induced fluorescence with laser synchronized flow control is employed as a non-invasive in situ technique to investigate a NOx storage catalyst, especially to grant a deeper insight into the  ...  The output laser beam, about 6 mJ/pulse, is split into two beams by a quartz plate serving as a beam splitter.  ...  Light-off measurements are conducted in a packed bed with a temperature ramp of 3 K/min in a steady gas flow of 1 L/min. Two different gas atmospheres with varying NO concentration are used.  ... 
doi:10.1039/d2cy00572g fatcat:2sqjkzfz2jan7d53ki4zmyqzai

OpenLB Release 1.5: Open Source Lattice Boltzmann Code [article]

A. Kummerländer, S. Avis, H. Kusumaatmaja, F. Bukreev., D. Dapelo, S. Großmann, N. Hafen, C. Holeksa, A. Husfeldt, J. Jeßberger, L. Kronberg, J.E. Marquardt (+9 others)
2022 Zenodo  
The OpenLB project provides a C++ package for the implementation of lattice Boltzmann methods (LBM) that is general enough to address a vast range of tansport problems, e.g. in computational fluid dynamics  ...  The source code is publicly available and constructed in a well readable, modular way.  ...  Functors -A General Concept for Input and Output of Data Roughly speaking, a functor is a class that behaves like a function.  ... 
doi:10.5281/zenodo.6469606 fatcat:ux6yiim2ffhelnsafu5itnzrym
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