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Articles 11491 - 11520 of 13173
Full-Text Articles in Entire DC Network
Entropy Generation Analysis And Optimum Tube Length Of Two-Phase Flow Evaporator Tube, Obiora Sam Ezeora
Entropy Generation Analysis And Optimum Tube Length Of Two-Phase Flow Evaporator Tube, Obiora Sam Ezeora
International Refrigeration and Air Conditioning Conference
No abstract provided.
Numerical Resolution Of Two-Fluid Model Equations For Condensation And Evaporation Flow In Ducts Using A Pressure Based Method, Sergio Morales, Joaquim Rigola, Carlos D. Perez-Segarra, Assensi Oliva
Numerical Resolution Of Two-Fluid Model Equations For Condensation And Evaporation Flow In Ducts Using A Pressure Based Method, Sergio Morales, Joaquim Rigola, Carlos D. Perez-Segarra, Assensi Oliva
International Refrigeration and Air Conditioning Conference
No abstract provided.
Detailed Unsteady Simulation Of Liquid Overfeed Refrigerating Systems, Alexandre Sadurni, Carles Oliet, Joaquim Rigola, Assensi Oliva
Detailed Unsteady Simulation Of Liquid Overfeed Refrigerating Systems, Alexandre Sadurni, Carles Oliet, Joaquim Rigola, Assensi Oliva
International Refrigeration and Air Conditioning Conference
No abstract provided.
A Simulation For Predicting The Refrigerant Flow Characteristics Including Metastable Region In Non-Adiabatic Capillary Tubes, Kidong Son, Sanggoo Park, Jihwan Jeong, Lyunsu Kim
A Simulation For Predicting The Refrigerant Flow Characteristics Including Metastable Region In Non-Adiabatic Capillary Tubes, Kidong Son, Sanggoo Park, Jihwan Jeong, Lyunsu Kim
International Refrigeration and Air Conditioning Conference
No abstract provided.
A Simplified Steady-State Model For Predicting The Energy Consumption Of Household Refrigerators And Freezers, Joaquim M. Gonzalves, Christian J. L. Hermes, Claudio Melo, Fernando T. Knabben
A Simplified Steady-State Model For Predicting The Energy Consumption Of Household Refrigerators And Freezers, Joaquim M. Gonzalves, Christian J. L. Hermes, Claudio Melo, Fernando T. Knabben
International Refrigeration and Air Conditioning Conference
No abstract provided.
High-Order Discontinuous Galerkin Method For Boltzmann Model Equations, Alina A. Alexeenko, Cyril Galitzine, Alexander M. Alekseenko
High-Order Discontinuous Galerkin Method For Boltzmann Model Equations, Alina A. Alexeenko, Cyril Galitzine, Alexander M. Alekseenko
School of Aeronautics and Astronautics Faculty Publications
High-order Runge-Kutta discontinuous Galerkin (DG) method is applied to the kinetic model equations describing rarefied gas flows. A conservative DG discretization of nonlinear collision relaxation term is formulated for Bhatnagar-Gross-Krook and ellipsoidal statistical models. The numerical solutions using RKDG method of order up to four are obtained for two flow problems: the heat transfer between parallel plates and the normal shock wave. The convergence of RKDG method is compared with the conventional secondorder finite volume method for the heat transfer problem. The normal shock wave solutions obtained using RKDG are compared with the experimental measurements of density and velocity distribution …
Dynamic Analysis Of The Discharge Valve Of The Rotary Compressor, Bo Huang, Fei Xie
Dynamic Analysis Of The Discharge Valve Of The Rotary Compressor, Bo Huang, Fei Xie
International Compressor Engineering Conference
No abstract provided.
Nesting Forward-Mode Ad In A Functional Framework, Jeffrey M. Siskind, Barak A. Pearlmutter
Nesting Forward-Mode Ad In A Functional Framework, Jeffrey M. Siskind, Barak A. Pearlmutter
Department of Electrical and Computer Engineering Technical Reports
We discuss the augmentation of a functional-programming language with a derivative- taking operator implemented with forward-mode automatic differentiation (AD). The primary technical difficulty in doing so lies in ensuring correctness in the face of nested invocation of that operator, due to the need to distinguish perturbations introduced by distinct invocations. We exhibit a series of implementations of a referentially- transparent forward-mode-AD derivative-taking operator, each of which uses a different non-referentially-transparent mechanism to distinguish perturbations. Even though the forward-mode-AD derivative-taking operator is itself referentially transparent, we hypothesize that one cannot correctly formulate this operator as a function definition in current pure …
A Novel Evidence Accumulation Framework For Robust Multi-Camera Person Detection, Hidekazu Iwaki, Gaurav Srivastava, Akio Kosaka, Johnny Park, Avinash Kak
A Novel Evidence Accumulation Framework For Robust Multi-Camera Person Detection, Hidekazu Iwaki, Gaurav Srivastava, Akio Kosaka, Johnny Park, Avinash Kak
Department of Electrical and Computer Engineering Faculty Publications
We propose a novel evidence accumulation framework that accurately estimates the positions of humans in a 3D environment. The framework consists of a network of distributed agents having different functionalities. The modular structure of the network allows scalability to large surveillance areas and robust operation. The framework does not assume reliable measurements in single cameras (referred to as 'sensing agents' in our framework) or reliable communication between different agents. There is a position uncertainty associated with single camera measurements and it is reduced through an uncertainty reducing transform that performs evidence accumulation using multiple camera measurements. Our framework has the …
An Efficient Network Model For Determining The Effective Thermal Conductivity Of Particulate Thermal Interface Materials, S Kanuparthi, G Subbarayan, Thomas Siegmund, B Sammakia
An Efficient Network Model For Determining The Effective Thermal Conductivity Of Particulate Thermal Interface Materials, S Kanuparthi, G Subbarayan, Thomas Siegmund, B Sammakia
School of Mechanical Engineering Faculty Publications
Particulate composites are commonly used in Microelectronics applications. One example of such materials is Thermal Interface Materials (TIMs) that are used to reduce the contact resistance between the chip and the heat sink. The existing analytical descriptions of thermal transport in particulate systems do not accurately account for the effect of inter-particle interactions, especially in the intermediate volume fractions of 30-80%. Another crucial drawback in the existing analytical as well as the network models is the inability to model size distributions (typically bimodal) of the filler material particles that are obtained as a result of the material manufacturing process. While …
A Novel Thermal Solution For Electronics Cooling, Part I: Design Of A Thermal Control Unit (Tcu), Kimtiow Ooi, Yongliang Teh, Florence Pei Fan Ng, Tiewtoon Phay
A Novel Thermal Solution For Electronics Cooling, Part I: Design Of A Thermal Control Unit (Tcu), Kimtiow Ooi, Yongliang Teh, Florence Pei Fan Ng, Tiewtoon Phay
International Refrigeration and Air Conditioning Conference
No abstract provided.
An Estimation Method For The Thermal Conductivity Of The Refrigerants In The Liquid State, Giovanni Latini
An Estimation Method For The Thermal Conductivity Of The Refrigerants In The Liquid State, Giovanni Latini
International Refrigeration and Air Conditioning Conference
No abstract provided.
Modeling And Experimental Investigation On The Internal Leakage In A Co2 Rotary Vane Expander, Bingchun Yang, Shaoyi Sun, Xueyuan Peng, Bei Guo, Ziwen Xing
Modeling And Experimental Investigation On The Internal Leakage In A Co2 Rotary Vane Expander, Bingchun Yang, Shaoyi Sun, Xueyuan Peng, Bei Guo, Ziwen Xing
International Compressor Engineering Conference
No abstract provided.
A Comparative Analysis Of Numerical Simulation Approaches For Reciprocating Compressors, Evandro L. L. Pereira, Cesar J. Deschamps, Fernando A. Ribas
A Comparative Analysis Of Numerical Simulation Approaches For Reciprocating Compressors, Evandro L. L. Pereira, Cesar J. Deschamps, Fernando A. Ribas
International Compressor Engineering Conference
No abstract provided.
Valve Lift Measurement For The Validation Of A Compressor Simulation Model, Daniel Nagy, Raimund A. Almbauer, Wolfgang Lang, Adolf Burgstaller
Valve Lift Measurement For The Validation Of A Compressor Simulation Model, Daniel Nagy, Raimund A. Almbauer, Wolfgang Lang, Adolf Burgstaller
International Compressor Engineering Conference
No abstract provided.
Mojave: Monitoring Of Jets In Agn With Vlba Experiments. Iv. The Parent Luminosity Function Of Radio-Loud Blazars, M. Cara, M. L. Lister
Mojave: Monitoring Of Jets In Agn With Vlba Experiments. Iv. The Parent Luminosity Function Of Radio-Loud Blazars, M. Cara, M. L. Lister
Department of Physics and Astronomy Faculty Publications
We use a complete sample of active galactic nuclei (AGN) selected on the basis of relativistically beamed 15 GHz radio flux density (MOJAVE: Monitoring of Jets in AGN with VLBA Experiments) to derive the parent radio luminosity function (RLF) of bright radio-selected blazar cores. We use a maximum likelihood method to fit a beamed RLF to the observed data and thereby recover the parameters of the intrinsic (unbeamed) RLF. We analyze two sub-samples of the MOJAVE sample: the first contains only objects of known FR II class, with a total of 103 sources, and the second subsample adds 24 objects …
Analysis On Hollow Fiber Membrane Heat Exchanger Applying To The Lithium Bromide Absorption Refrigeration System, Zanshe Wang, Shiyu Feng, Yun Li, Zhaolin Gu
Analysis On Hollow Fiber Membrane Heat Exchanger Applying To The Lithium Bromide Absorption Refrigeration System, Zanshe Wang, Shiyu Feng, Yun Li, Zhaolin Gu
International Refrigeration and Air Conditioning Conference
No abstract provided.
Theoretical Analysis Of The Effect Of Oil Atomization In The Cylinder Of A Reciprocating Ammonia Compressor, Rodrigo Kremer, Cesar J. Deschamps, Jader R. Barbosa
Theoretical Analysis Of The Effect Of Oil Atomization In The Cylinder Of A Reciprocating Ammonia Compressor, Rodrigo Kremer, Cesar J. Deschamps, Jader R. Barbosa
International Compressor Engineering Conference
No abstract provided.
Comparison Between Different Arrangements Of Bypass Valves In Scroll Compressors, Yangguang Liu, Chinghua Hung, Yuchoung Chang
Comparison Between Different Arrangements Of Bypass Valves In Scroll Compressors, Yangguang Liu, Chinghua Hung, Yuchoung Chang
International Compressor Engineering Conference
No abstract provided.
Mixed Lubrication Analysis Of Vane Sliding Surface In Rotary Compressor Mechanisms - Influences Of Elastic Deformation At Surface End Of Vane Slot - , Yasutaka Ito, Hitoshi Hattori, Kazuhiko Miura
Mixed Lubrication Analysis Of Vane Sliding Surface In Rotary Compressor Mechanisms - Influences Of Elastic Deformation At Surface End Of Vane Slot - , Yasutaka Ito, Hitoshi Hattori, Kazuhiko Miura
International Compressor Engineering Conference
No abstract provided.
Detection Of Valve Leakage In Reciprocating Compressor Using Artificial Neural Network (Ann), Rajeev Namdeo, Smita Manepatil, Suvandan Saraswat
Detection Of Valve Leakage In Reciprocating Compressor Using Artificial Neural Network (Ann), Rajeev Namdeo, Smita Manepatil, Suvandan Saraswat
International Compressor Engineering Conference
No abstract provided.
Coupling Of 0-,1- And 3-D Tool For The Simulation Of The Suction Line Of A Hermetic Reciprocating Compressor, Wolfgang Lang, Raimund Almbauer, Adolf Burgstaller, Daniel Nagy
Coupling Of 0-,1- And 3-D Tool For The Simulation Of The Suction Line Of A Hermetic Reciprocating Compressor, Wolfgang Lang, Raimund Almbauer, Adolf Burgstaller, Daniel Nagy
International Compressor Engineering Conference
No abstract provided.
Investigating The Transmission Loss Of Compressor Suction Mufflers Applying Experimental And Numerical Methods, Israel Jorge Cardenas Nuñez, Ana Lucia Libardi De Marqui, Marcelo Cavaglieri, Jose Roberto De Franca Arruda
Investigating The Transmission Loss Of Compressor Suction Mufflers Applying Experimental And Numerical Methods, Israel Jorge Cardenas Nuñez, Ana Lucia Libardi De Marqui, Marcelo Cavaglieri, Jose Roberto De Franca Arruda
International Compressor Engineering Conference
No abstract provided.
Numerical Simulation Of A Scroll Expander For Use In A Rankine Cycle, Vincent Lemort, Sylvain Quoilin, Jean Lebrun
Numerical Simulation Of A Scroll Expander For Use In A Rankine Cycle, Vincent Lemort, Sylvain Quoilin, Jean Lebrun
International Compressor Engineering Conference
No abstract provided.
A Fast Frequency-Domain Eigenvalue-Based Approach To Full-Wave Modeling Of Large-Scale Three-Dimensional On-Chip Interconnect Structures, Jiao Dan, Zhu Jianfang, S. Chakravarty
A Fast Frequency-Domain Eigenvalue-Based Approach To Full-Wave Modeling Of Large-Scale Three-Dimensional On-Chip Interconnect Structures, Jiao Dan, Zhu Jianfang, S. Chakravarty
Department of Electrical and Computer Engineering Faculty Publications
As on-chip circuits have scaled into the deep submicron regime, electromagnetics-based analysis has increasingly become essential for high-performance integrated circuit (IC) design. Not only fast, but also high-capacity electromagnetic solutions are demanded to overcome the large problem size facing on-chip design community. In this paper, we present a novel, high-capacity, and fast approach to the full-wave modeling of 3-D on-chip interconnect structures. In this approach, the interconnect structure is decomposed into a number of seeds. In each seed, the original wave propagation problem is represented as a generalized eigenvalue problem. The resulting eigenvalue representation can comprehend both conductor and dielectric …
A Novel Image Analysis Method Based On Bayesian Segmentation For Event-Related Functional Mri, Lejian Huang, Mary L. Comer, Thomas M. Talavage
A Novel Image Analysis Method Based On Bayesian Segmentation For Event-Related Functional Mri, Lejian Huang, Mary L. Comer, Thomas M. Talavage
Department of Electrical and Computer Engineering Faculty Publications
This paper presents the application of the expectation-maximization/ maximization of the posterior marginals (EM/MPM) algorithm to signal detection for functional MRI (fMRI). On basis of assumptions for fMRI 3-D image data, a novel analysis method is proposed and applied to synthetic data and human brain data. Synthetic data analysis is conducted using two statistical noise models (white and autoregressive of order 1) and, for low contrast-to-noise ratio (CNR) data, reveals better sensitivity and specificity for the new method than for the traditional General Linear Model (GLM) approach. When applied to human brain data, functional activation regions are found to be …
Modeling Of Spin Metal-Oxide-Semiconductor Field-Effect Transistor: A Nonequilibrium Green’S Function Approach With Spin Relaxation, Tony Low, Mark S. Lundstrom, Dmitri E. Nikonov
Modeling Of Spin Metal-Oxide-Semiconductor Field-Effect Transistor: A Nonequilibrium Green’S Function Approach With Spin Relaxation, Tony Low, Mark S. Lundstrom, Dmitri E. Nikonov
Department of Electrical and Computer Engineering Faculty Publications
A spin metal-oxide-semiconductor field-effect transistor spin MOFSET, which combines a Schottky-barrier MOFSET with ferromagnetic source and drain contacts, is a promising device for spintronic logic. Previous simulation studies predict that this device should display a very high magnetoresistance MR ratio between the cases of parallel and anitparallel magnetizations for the case of half-metal ferromagnets HMF. We use the nonequilibrium Green’s function formalism to describe tunneling and carrier transport in this device and to incorporate spin relaxation at the HMF-semiconductor interfaces. Spin relaxation at interfaces results in nonideal spin injection. Minority spin currents arise and dominate the leakage current for antparallel …
Simulation Of Thermal Transport In Open-Cell Metal Foams: Effect Of Periodic Unit Cell Structure, S. Krishnan, S V. Garimella, J. Y. Murthy
Simulation Of Thermal Transport In Open-Cell Metal Foams: Effect Of Periodic Unit Cell Structure, S. Krishnan, S V. Garimella, J. Y. Murthy
CTRC Research Publications
Direct simulation of thermal transport in open-cell metal foams is conducted using different periodic unit-cell geometries. The periodic unit-cell structures are constructed by assuming the pore space to be spherical and subtracting the pore space from a unit cube of the metal. Different types of packing arrangement for spheres are considered—body centered cubic, face centered cubic, and the A15 lattice (similar to a Weaire-Phelan unit cell)—which give rise to different foam structures. Effective thermal conductivity, pressure drop, and Nusselt number are computed by imposing periodic boundary conditions for aluminum foams saturated with air or water. The computed values compare well …
Analysis Of Liquid-Flooded Expansion Using A Scroll Expander, Vincent Lemort, Ian Bell, Eckhard A. Groll, Jim Braun
Analysis Of Liquid-Flooded Expansion Using A Scroll Expander, Vincent Lemort, Ian Bell, Eckhard A. Groll, Jim Braun
International Compressor Engineering Conference
No abstract provided.
Many-Body Local Fields Theory Of Quasiparticle Properties In A Three-Dimensional Electron Liquid, G. E. Simion, G. F. Giuliani
Many-Body Local Fields Theory Of Quasiparticle Properties In A Three-Dimensional Electron Liquid, G. E. Simion, G. F. Giuliani
Department of Physics and Astronomy Faculty Publications
We present a quantitative study of the quasiparticle properties of a three-dimensional electron Fermi liquid. Our approach is based on the theory of the many-body local field factors which we use to include vertex corrections associated with charge and spin fluctuations. Extensive use is made of the results of recent quantum Monte Carlo calculations. Several models for the wave-vector dependence of the spin-antisymmetric many-body local field factor G(-), for which no numerical results are currently available, are discussed and compared. Both the real and imaginary parts of the self-energy as well as the quasiparticle renormalization constant and the enhancement of …