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2002

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An Experimental And Numerical Investigation Of The Bridgman Growth Of A Transparent Material, J E. Simpson, S V. Garimella, H C. De Groh Iii Jan 2002

An Experimental And Numerical Investigation Of The Bridgman Growth Of A Transparent Material, J E. Simpson, S V. Garimella, H C. De Groh Iii

CTRC Research Publications

No abstract provided.

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Performance Projections For Ballistic Carbon Nanotube Field-Effect Transistors, Jing Guo, Mark S. Lundstrom, Supriyo Datta Jan 2002

Performance Projections For Ballistic Carbon Nanotube Field-Effect Transistors, Jing Guo, Mark S. Lundstrom, Supriyo Datta

Department of Electrical and Computer Engineering Faculty Publications

The performance limits of carbon nanotube field-effect transistors (CNTFETs) are examined theoretically by extending a one-dimensional treatment used for silicon metal-oxide-semiconductor field-effect transistors (MOSFETs). Compared to ballistic MOSFETs, ballistic CNTFETs show similar I-VI-V characteristics but the channel conductance is quantized. For low-voltage, digital applications, the CNTFET with a planar gate geometry provides an on-current that is comparable to that expected for a ballistic MOSFET. Significantly better performance, however, could be achieved with high gate capacitance structures. Because the computed performance limits greatly exceed the performance of recently reported CNTFETs, there is considerable opportunity for progress in device performance.

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A Drift-Diffusion Equation For Ballistic Transport In Nanoscale Metal-Oxide-Semiconductor Field Effect Transistors, Jung-Hoon Rhew, Mark S. Lundstrom Jan 2002

A Drift-Diffusion Equation For Ballistic Transport In Nanoscale Metal-Oxide-Semiconductor Field Effect Transistors, Jung-Hoon Rhew, Mark S. Lundstrom

Department of Electrical and Computer Engineering Faculty Publications

The performance limits of carbon nanotube field-effect transistors ~CNTFETs! are examined theoretically by extending a one-dimensional treatment used for silicon metal–oxide– semiconductor field-effect transistors ~MOSFETs!. Compared to ballistic MOSFETs, ballistic CNTFETs show similar I –V characteristics but the channel conductance is quantized. For low-voltage, digital applications, the CNTFET with a planar gate geometry provides an on-current that is comparable to that expected for a ballistic MOSFET. Significantly better performance, however, could be achieved with high gate capacitance structures. Because the computed performance limits greatly exceed the performance of recently reported CNTFETs, there is considerable opportunity for progress in device performance.

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Simulating Quantum Transport In Nanoscale Mosfets: Real Vs. Mode Space Approaches, Rajesh Venugopal, Z. Ren, Supriyo Datta, Mark S. Lundstrom, D. Jovanovic Jan 2002

Simulating Quantum Transport In Nanoscale Mosfets: Real Vs. Mode Space Approaches, Rajesh Venugopal, Z. Ren, Supriyo Datta, Mark S. Lundstrom, D. Jovanovic

Department of Electrical and Computer Engineering Faculty Publications

The performance limits of carbon nanotube field-effect transistors (CNTFETs) are examined theoretically by extending a one-dimensional treatment used for silicon metal–oxide–semiconductor field-effect transistors (MOSFETs). Compared to ballistic MOSFETs, ballistic CNTFETs show similar I–VI–V characteristics but the channel conductance is quantized. For low-voltage, digital applications, the CNTFET with a planar gate geometry provides an on-current that is comparable to that expected for a ballistic MOSFET. Significantly better performance, however, could be achieved with high gate capacitance structures. Because the computed performance limits greatly exceed the performance of recently reported CNTFETs, there is considerable opportunity for progress in device performance.

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Concentration Fields In The Solidification Processing Of Metal Matrix Composites, B Moussa, J E. Simpson, S V. Garimella Jan 2002

Concentration Fields In The Solidification Processing Of Metal Matrix Composites, B Moussa, J E. Simpson, S V. Garimella

CTRC Research Publications

A numerical investigation of the solidification of a binary alloy (Al-1.0 wt.% Cu) around cylindrical fibers with different fiber layouts and thermophysical properties was undertaken to gain insight into the processing of fiber-rein- forced metal matrix composites. The focus of this study was on solute transport and redistribution during the solidi-fication process, and the resulting concentration fields in the solidified alloy matrix. Change of phase in the alloy was formulated using a modified version of the temperature-transforming method for the energy equation. A source term that accounts for the solute rejection at the interface was incorporated into the solute concentration …

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Toward A Reconfigurable Snmp-Based Distributed Monitoring Mechanism For Networked Computing Systems, Rajesh Subramanyan, Jose Miguel-Alonso, Jose A.B. Fortes Jan 2002

Toward A Reconfigurable Snmp-Based Distributed Monitoring Mechanism For Networked Computing Systems, Rajesh Subramanyan, Jose Miguel-Alonso, Jose A.B. Fortes

Department of Electrical and Computer Engineering Technical Reports

The dynamic nature of large-size Network Computing Systems (NCSs) and the varying monitoring demands from the end-users pose serious challenges for monitoring systems (MSs). A statically configured MS initially adjusted to perform optimally may end performing poorly. A reconfiguration mechanism for a distributed MS is proposed. It enables the MS to react to changes in the available resources, operating conditions, and monitoring requirements, while maintaining high performance and low monitoring overheads. The distributed MS is organized as a tree, consisting of managed nodes running agents, one or more levels of intermediate-level managers (ILMs), and a top-level manager (TLM) for overall …

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On-Chip Interconnect Modeling By Wire Duplication, Guoan Zhong, Cheng-Kok Koh, Kaushik Roy Jan 2002

On-Chip Interconnect Modeling By Wire Duplication, Guoan Zhong, Cheng-Kok Koh, Kaushik Roy

Department of Electrical and Computer Engineering Technical Reports

In this paper, we present a novel wire duplication-based interconnect modeling technique. The proposed modeling technique uses the original inductance to exploit the sparsity of the L

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Semidefinite Programming Duality And Linear Time-Invariant Systems, Venkataramanan Balakrishnan, Lieven Vandenberghe Jan 2002

Semidefinite Programming Duality And Linear Time-Invariant Systems, Venkataramanan Balakrishnan, Lieven Vandenberghe

Department of Electrical and Computer Engineering Technical Reports

Several important problems in control theory can be reformulated as semidefinite programming problems, i.e., minimization of a linear objective subject to Linear Matrix Inequality (LMI) constraints. From convex optimization duality theory, conditions for infeasibility of the LMIs as well as dual optimization problems can be formulated. These can in turn be re-interpreted in control or system theoretic terms, often yielding new results or new proofs for existing results from control theory. We explore such connections for a few problems associated with linear time-invariant systems.

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A Technical Report On A Polytopic System Approach For The Hybrid Control Of A Diesel Engine Using Vgt/Egr, Sorin Bengea, Ray Decarlo, Martin Corless, Giorgio Rizzoni Jan 2002

A Technical Report On A Polytopic System Approach For The Hybrid Control Of A Diesel Engine Using Vgt/Egr, Sorin Bengea, Ray Decarlo, Martin Corless, Giorgio Rizzoni

Department of Electrical and Computer Engineering Technical Reports

This paper develops a hybrid/gain scheduled control to move a diesel engine through a driving profile represented as a set of 12 operating points in the 7-dimensional state space of a 7th order nonlinear state model. The calculations for the control design are based on a 3rd order(reduced) model of the Diesel engine on which state space is projected the 12 operating points. About each operating point, we generate a 3rd order nonlinear error models of the Diesel engine. Using the error model for each operating point, a control design is set forth as a system of LMI's. The solution …

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A Cfd Based Identification Method Of The Transmittances For The Pulsating Gas Installation Element Part I: Theory , P. Cyklis Jan 2002

A Cfd Based Identification Method Of The Transmittances For The Pulsating Gas Installation Element Part I: Theory , P. Cyklis

International Compressor Engineering Conference

No abstract provided.

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Performance Investigation With Oil-Injection To Compression Chambers On Co2-Scroll Compressor , A. Hiwata, N. Iida, Y. Futagami, K. Sawai, N. Ishii Jan 2002

Performance Investigation With Oil-Injection To Compression Chambers On Co2-Scroll Compressor , A. Hiwata, N. Iida, Y. Futagami, K. Sawai, N. Ishii

International Compressor Engineering Conference

No abstract provided.

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Development Of A Reciprocating Compressor Using Water Injection To Achieve Quasi-Isothermal Compression , M. W. Coney, P. Stephenson, A. Malmgren, C. Linnemann, R. E. Morgan, R. A. Richards, R. Huxley, H. Abdallah Jan 2002

Development Of A Reciprocating Compressor Using Water Injection To Achieve Quasi-Isothermal Compression , M. W. Coney, P. Stephenson, A. Malmgren, C. Linnemann, R. E. Morgan, R. A. Richards, R. Huxley, H. Abdallah

International Compressor Engineering Conference

No abstract provided.

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A Twin Screw Combined Compressor And Expander For Co2 Refrigeration Systems , N. Stosic, I. K. Smith, A. Kovacevic Jan 2002

A Twin Screw Combined Compressor And Expander For Co2 Refrigeration Systems , N. Stosic, I. K. Smith, A. Kovacevic

International Compressor Engineering Conference

No abstract provided.

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Design Improvement Of A Compressor Bearing Using An Elastohydrodynamic Lubrication Model , M. Duyar, Z. Dursunkaya Jan 2002

Design Improvement Of A Compressor Bearing Using An Elastohydrodynamic Lubrication Model , M. Duyar, Z. Dursunkaya

International Compressor Engineering Conference

No abstract provided.

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A High Performance Linear Compressor For Cpu Cooling , R. Unger, S. Novotny Jan 2002

A High Performance Linear Compressor For Cpu Cooling , R. Unger, S. Novotny

International Compressor Engineering Conference

No abstract provided.

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Optimum Compression To Ventilation Ratios In Cpr Under Realistic, Practical Conditions: A Physiological And Mathematical Analysis, Charles F. Babbs, Karl B. Kern Jan 2002

Optimum Compression To Ventilation Ratios In Cpr Under Realistic, Practical Conditions: A Physiological And Mathematical Analysis, Charles F. Babbs, Karl B. Kern

Weldon School of Biomedical Engineering Faculty Publications

Objective: To develop and evaluate a practical formula for the optimum ratio of compressions to ventilations in CPR. The optimum value of a parameter is that for which a desired result is maximized. Here the desired result is assumed to be either oxygen delivery to peripheral tissues or a combination of oxygen delivery and waste product removal. Method: Equations describing oxygen delivery and blood flow during CPR as functions of the number of compressions and the number of ventilations delivered over time were developed from principles of classical physiology. These equations were solved explicitly in terms of the compression/ventilation ratio …

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Determining The Optimum Number Of Hidden Nodes In Constructive Functional-Link Networks Using Validation And Vc Dimension, Hoi-Ming Chi, Okan K. Ersoy Jan 2002

Determining The Optimum Number Of Hidden Nodes In Constructive Functional-Link Networks Using Validation And Vc Dimension, Hoi-Ming Chi, Okan K. Ersoy

Department of Electrical and Computer Engineering Technical Reports

In this paper, a new and powerful learning algorithm, which combines the idea of constructive algorithm, functional-link neural network and VC dimension, is introduced. Its structure consists of two stages, a mapping stage and a learning stage, corresponding to three layers, namely, input layer, hidden layer and output layer. The input training vectors are initially mapped to the feature vectors in the mapping stage by multiplying with a random matrix, followed by a pointwise nonlinear transformation. This is done starting with only one hidden node. In the learning stage, the feature vectors are fed into the least squares learning module …

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Experimental Study On The Characteristics Of Twin Screw Compressor In Air-Source Heat Pump System (C61), H. Wu, T. Cui, X. Peng, Z. Xing Jan 2002

Experimental Study On The Characteristics Of Twin Screw Compressor In Air-Source Heat Pump System (C61), H. Wu, T. Cui, X. Peng, Z. Xing

International Compressor Engineering Conference

No abstract provided.

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A Case Study Of Theoretical Analysis Comparisons Of 3rt And 35rt Scroll Compressors , C. F. Lai, Y. C. Chang, B. C. Yang Jan 2002

A Case Study Of Theoretical Analysis Comparisons Of 3rt And 35rt Scroll Compressors , C. F. Lai, Y. C. Chang, B. C. Yang

International Compressor Engineering Conference

No abstract provided.

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Development Of Scroll Compressors With The High Performance Used For Marine Container Refrigeration Unit , Y. Yoshida, K. Yoshimura, R. Kato, S. Hiodoshi Jan 2002

Development Of Scroll Compressors With The High Performance Used For Marine Container Refrigeration Unit , Y. Yoshida, K. Yoshimura, R. Kato, S. Hiodoshi

International Compressor Engineering Conference

No abstract provided.

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Noise Reduction Technology For Inverter Controlled Scroll Compressors , M. Yanagisawa, T. Uematsu, S. Hiodoshi, M. Saito, S. Era Jan 2002

Noise Reduction Technology For Inverter Controlled Scroll Compressors , M. Yanagisawa, T. Uematsu, S. Hiodoshi, M. Saito, S. Era

International Compressor Engineering Conference

No abstract provided.

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Comparison Of Screw Rotor Profiles From A Manufacturing Perspective , J. Sauls Jan 2002

Comparison Of Screw Rotor Profiles From A Manufacturing Perspective , J. Sauls

International Compressor Engineering Conference

No abstract provided.

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Experimental Study Of The Oil Injection Screw Air Compressor , Z. Zhang, Y. Tan, G. Shi, Z. Qian Jan 2002

Experimental Study Of The Oil Injection Screw Air Compressor , Z. Zhang, Y. Tan, G. Shi, Z. Qian

International Compressor Engineering Conference

No abstract provided.

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Screw Compressor For Ammonia-Water Heat Pump Lubricated By The Process Mixture , D. Zaytsev, C. A. Infante Ferreira Jan 2002

Screw Compressor For Ammonia-Water Heat Pump Lubricated By The Process Mixture , D. Zaytsev, C. A. Infante Ferreira

International Compressor Engineering Conference

No abstract provided.

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Effects Of Leakage Flow Model On The Thermodynamic Performance Of A Scroll Compressor , D. J. Kang, J. W. Kim, C. B. Sohn Jan 2002

Effects Of Leakage Flow Model On The Thermodynamic Performance Of A Scroll Compressor , D. J. Kang, J. W. Kim, C. B. Sohn

International Compressor Engineering Conference

No abstract provided.

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Leakage Experiments On A Running Twin Screw Compressor , J. Prins, C. A. Infante Ferreira Jan 2002

Leakage Experiments On A Running Twin Screw Compressor , J. Prins, C. A. Infante Ferreira

International Compressor Engineering Conference

No abstract provided.

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A Study On The Leakage Characteristics Of Tip Seal Mechanism In The Scroll Compressor , B. C. Lee, T. Yanagisawa, M. Fukuta, S. Choi Jan 2002

A Study On The Leakage Characteristics Of Tip Seal Mechanism In The Scroll Compressor , B. C. Lee, T. Yanagisawa, M. Fukuta, S. Choi

International Compressor Engineering Conference

No abstract provided.

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Fluid-Solid Interaction In Screw Compressors , A. Kovacevic, N. Stosic, I. K. Smith Jan 2002

Fluid-Solid Interaction In Screw Compressors , A. Kovacevic, N. Stosic, I. K. Smith

International Compressor Engineering Conference

No abstract provided.

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Mathematical Modeling Of Physical Processes In The Scroll Compressor Chamber , S. Pietrowicz, T. Yanagisawa, M. Fukuta, Z. Gnutek Jan 2002

Mathematical Modeling Of Physical Processes In The Scroll Compressor Chamber , S. Pietrowicz, T. Yanagisawa, M. Fukuta, Z. Gnutek

International Compressor Engineering Conference

No abstract provided.

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The Design Of A New Generation Of Twin Screw Refrigeration Compressors , Z. Xing, H. Wu, P. Shu Jan 2002

The Design Of A New Generation Of Twin Screw Refrigeration Compressors , Z. Xing, H. Wu, P. Shu

International Compressor Engineering Conference

No abstract provided.

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