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Adaptable Recovery Using Dynamic Quorum Assignments, Bharat Bhargava, Shirley Browne Jun 1989

Adaptable Recovery Using Dynamic Quorum Assignments, Bharat Bhargava, Shirley Browne

Department of Computer Science Technical Reports

No abstract provided.

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Dap2d: A Two-Dimensional Device Simulation Tool For Silicon Bipolar Transistors, J. L. Egley, J. L. Gray Jun 1989

Dap2d: A Two-Dimensional Device Simulation Tool For Silicon Bipolar Transistors, J. L. Egley, J. L. Gray

Department of Electrical and Computer Engineering Technical Reports

The purpose of this document is to serve as the final report for work performed for Delco Electronics for the period January 1, 1986 through May 15, 1989. A computer program, SCAP2D (Solar Cell Analysis Program in 2- Dimensions) has been successfully converted to enable the simulation of bipolar transistors, including Delco’s thin-epi transistor. This code will be referred to as DAP 2D (Device Analysis Program in 2-Dimensions). Complete source code of DAP 2D is being released to Delco Electronics. This report is organized as follows. Chapter 2 provides a review of the numerical device modeling and discusses code enhancements …

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Detailed Modeling And Reliability Analysis Of Fault-Tolerant Processor Arrays, Noe Lopez-Benitez, Jose A. B. Fortes Jun 1989

Detailed Modeling And Reliability Analysis Of Fault-Tolerant Processor Arrays, Noe Lopez-Benitez, Jose A. B. Fortes

Department of Electrical and Computer Engineering Technical Reports

Recent advances in VLSI/WSI technology have led to the design of processor arrays with a large number of processing elements confined in small areas. The use of redundancy to increase fault-tolerance has the effect of reducing the ratio of area dedicated to processing elements over the area occupied by other resources in the array. The assumption of fault-free hardware support (switches, buses, interconnection links, etc.,), leads at best to conservative reliability estimates. However, detailed modeling entails not only an explosive growth in the model state space but also a difficult model construction process. To address the latter problem, a systematic …

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Self-Organizing Neural Network For Optimum Supervised Learning, Manoel Fernando Tenorio, Wei-Tsih Lee Jun 1989

Self-Organizing Neural Network For Optimum Supervised Learning, Manoel Fernando Tenorio, Wei-Tsih Lee

Department of Electrical and Computer Engineering Technical Reports

This work introduces a new algorithm called the Self-Organizing Neural Network (SONN), and demonstrates its use in a system identification task. The algorithm constructs a network, chooses the neuron functions, and adjusts the weights. Here, it is compared to the Back-Propagation algorithm in the identification of the chaotic time series. The results show that SONN constructs a simpler, more accurate model, requiring less training data and epochs. The algorithm can also be applied as a classifier.

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Supporting Value Dependency For Nested Transactions In Interbase, Ahmed K. Elmagarmid, Weimin Du May 1989

Supporting Value Dependency For Nested Transactions In Interbase, Ahmed K. Elmagarmid, Weimin Du

Department of Computer Science Technical Reports

No abstract provided.

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A Virtual Memory Operating System For A Distributed Workstation Environment, James Griffioen May 1989

A Virtual Memory Operating System For A Distributed Workstation Environment, James Griffioen

Department of Computer Science Technical Reports

No abstract provided.

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Constructing Trees In Parallel, Mikhail J. Atallah, S. R. Kosaraju, L. L. Larmore, G. L. Miller May 1989

Constructing Trees In Parallel, Mikhail J. Atallah, S. R. Kosaraju, L. L. Larmore, G. L. Miller

Department of Computer Science Technical Reports

No abstract provided.

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Uncertainty Management And Evidential Reasoning With Structured Knowledge, L. W. Chang, R. L. Kashyap May 1989

Uncertainty Management And Evidential Reasoning With Structured Knowledge, L. W. Chang, R. L. Kashyap

Department of Electrical and Computer Engineering Technical Reports

This research addresses two intensive computational problems of reasoning under uncertainty in artificial intelligence. The first problem is to study the strategy for belief propagation over networks. The second problem is to explore properties of operations which construe the behaviour of those factors in the networks. In the study of operations for computing belief combination over a network model, the computational characteristics of operations are modelled by a set of axioms which are in conformity with human inductive and deductive reasoning. According to different topological connection of networks, we investigate four types of operations. These operations successfully present desirable results …

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Theory And Simulation Of The Brushless Dc 120° Inverter System, Scott D. Sudhoff May 1989

Theory And Simulation Of The Brushless Dc 120° Inverter System, Scott D. Sudhoff

Department of Electrical and Computer Engineering Technical Reports

The brushless dc motor- inverter system is becoming increasingly popular in servo and variable speed applications. One type of inverter, the 120° inverter, does not require rotor position sensing hardware. In this thesis, a theory of the brushless dc motor with a 120° inverter is set forth and used to create a fast simulation procedure for steady state operation. This simulation is well suited for evaluation of torque speed curves since the effects of changes of system parameters can be rapidly assessed. Furthermore, it was found that the system operation may be classified into a finite number of distinct operating …

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Report On A Periodic Extrinsic Infrared (Peir) Photoconductor, P. E. Welsh, R. J. Schwartz May 1989

Report On A Periodic Extrinsic Infrared (Peir) Photoconductor, P. E. Welsh, R. J. Schwartz

Department of Electrical and Computer Engineering Technical Reports

An infrared photoconductor, designated as the Periodic Extrinsic InfraRed (PEIR) photoconductor, is proposed. A PEIR photoconductor will be useful for detecting wavelengths from 7 μm (1400 cm-1) to longer than 100 μm (100 cm-1). Through epitaxial growth, a PEIR photoconductor is made up of heavily doped layers separated by lightly doped layers. The heavily doped layers are doped such that an impurity band forms but are not doped high enough to cause the impurity band to merge with the conduction or valence band. The lightly doped layers are used to confine the carriers in the impurity bands and consequently, conduction …

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The Coupon-Collector Problem Revisited, Arnon Boneh, Micha Hofri May 1989

The Coupon-Collector Problem Revisited, Arnon Boneh, Micha Hofri

Department of Computer Science Technical Reports

No abstract provided.

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On Some Convergence Results Of The K-Step Interactive Methods, S. Galanis, A. Hadjidimos Apr 1989

On Some Convergence Results Of The K-Step Interactive Methods, S. Galanis, A. Hadjidimos

Department of Computer Science Technical Reports

No abstract provided.

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Quadric And Cubic Hypersurface Parameterization, Chanderjit Bajaj Apr 1989

Quadric And Cubic Hypersurface Parameterization, Chanderjit Bajaj

Department of Computer Science Technical Reports

No abstract provided.

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Optical Flow Estimation By Integrating Feature-Based With Flow-Based Schemes Under Multiresolution, Chia-Hoang Lee, Zhongquan Wu Apr 1989

Optical Flow Estimation By Integrating Feature-Based With Flow-Based Schemes Under Multiresolution, Chia-Hoang Lee, Zhongquan Wu

Department of Computer Science Technical Reports

No abstract provided.

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Towards Computable Stability Criteria For Some Multidimensional Stochastic Processes Arising In Queueing Models, Wojciech Szpankowski Apr 1989

Towards Computable Stability Criteria For Some Multidimensional Stochastic Processes Arising In Queueing Models, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

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Some Thoughts On Ultimate Stability Condition For G|G|1 Queue, Wojciech Szpankowski Apr 1989

Some Thoughts On Ultimate Stability Condition For G|G|1 Queue, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

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An Expert System For Unit Commitment, R. E. Tyson Apr 1989

An Expert System For Unit Commitment, R. E. Tyson

Department of Electrical and Computer Engineering Technical Reports

Methods used to solve the unit commitment problem of power generating systems should give a solution which is both feasible and optimal, and should be flexible enough to be rapidly and easily reimplemented in response to a changing and unpredictable environment. An expert system is proposed which incorporates both heuristic and numerical optimization methods to achieve such a solution. The expert system acts like a preprocessor for data which is to be used by a Dynamic Programming routine to determine the most economical schedule of generating units. After the schedule has been generated, the expert system acts like a postprocessor …

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Approximate Delay Analysis Of Transaction Oriented Communication In A Distributed System, Dan C. Marinescu Mar 1989

Approximate Delay Analysis Of Transaction Oriented Communication In A Distributed System, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

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Finding Point Correspondences And Determining Motion Of A Rigid Object From Two Weak Perspective Views, Chia-Hoang Lee, Thomas Huang Mar 1989

Finding Point Correspondences And Determining Motion Of A Rigid Object From Two Weak Perspective Views, Chia-Hoang Lee, Thomas Huang

Department of Computer Science Technical Reports

No abstract provided.

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Benchmarking Of Mimd Hardware On Subdomain Splitting Elliptic Pde Solvers., Elias N. Houstis, John R. Rice, E. A. Vavalis Mar 1989

Benchmarking Of Mimd Hardware On Subdomain Splitting Elliptic Pde Solvers., Elias N. Houstis, John R. Rice, E. A. Vavalis

Department of Computer Science Technical Reports

No abstract provided.

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On The Parallel-Decomposability Of Geometric Problems, Mikhail J. Atallah, Jyh-Jong Tsay Mar 1989

On The Parallel-Decomposability Of Geometric Problems, Mikhail J. Atallah, Jyh-Jong Tsay

Department of Computer Science Technical Reports

No abstract provided.

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Attracting Students To A Professional Career In Transportation Engineering, Harold L. Michael Mar 1989

Attracting Students To A Professional Career In Transportation Engineering, Harold L. Michael

Purdue Road School

No abstract provided.

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(Probably) Optimal Solution To Some Problems Not Only On Graphs, Wojciech Szpankowski Mar 1989

(Probably) Optimal Solution To Some Problems Not Only On Graphs, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

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Sequal 2.1 User’S Manual, M. J. Mclennan, S. Datta Mar 1989

Sequal 2.1 User’S Manual, M. J. Mclennan, S. Datta

Department of Electrical and Computer Engineering Technical Reports

SEQUAL is a device simulation program which performs a quantum mechanical analysis of electron transport. The user need not be an expert in quantum mechanics to obtain useful results from this program, although an understanding of the subject is an invaluable aid in the interpretation of output. For this reason,, the theoretical formulation of the analysis is presented in some detail, following a brief introduction. The knowledgeable (or anxious) user may turn directly to the discussions of input and output in Chapters 3 and 4. The reader is cautioned, however, not to skip Chaper 2 entirely. At the heart of …

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Generalized Approach For The Control Of Constrained Robot Systems, J. W. Jeon, C. S. G. Lee Mar 1989

Generalized Approach For The Control Of Constrained Robot Systems, J. W. Jeon, C. S. G. Lee

Department of Electrical and Computer Engineering Technical Reports

This paper presents a generalized approach for controlling various cases of the constrained robot system. To accomplish specific tasks successfully by a constrained robot system, both the constraint forces/torques and the motion of the manipulator end-effector must be specified and controlled. Using the Jacobian matrix of the constraint function, the generalized coordinates of the constrained robot system can be partitioned into two sets; this leads to partitioning the constrained robot system into two subsystems. The constraint forces/torques in each subsystem can be decomposed into two components: the motion-independent and the motion-dependent forces/torques. Using the constraint function in the Cartesian space, …

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3d Location Of Circular And Spherical Features By Monocular Model-Based Vision, Y. C. Shiu, Shaheen Ahmed Mar 1989

3d Location Of Circular And Spherical Features By Monocular Model-Based Vision, Y. C. Shiu, Shaheen Ahmed

Department of Electrical and Computer Engineering Technical Reports

This paper addresses the mathematics for using monocular model-based vision to find the 3-D positions of circular and spherical model features, and, for the circular case, orientations as well. Monocular model-based vision here refers to the use of a single projective image of modeled objects to solve for the 3-D positions and orientations of the objects in the scene. The mathematics for solving 3-dimensional position and orientation of the object from matched model and image points/lines features are well known. However, no known paper addresses spherical features arid very few papers address the mathematics involving circular model features. This paper …

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A Grid Based Subtree-Subcube Assignment Strategy For Solving Pdes On Hypercubes, Mo Mu, John R. Rice Feb 1989

A Grid Based Subtree-Subcube Assignment Strategy For Solving Pdes On Hypercubes, Mo Mu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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Solving Linear Systems With Sparse Matrices On Hypercubes, Mo Mu, John R. Rice Feb 1989

Solving Linear Systems With Sparse Matrices On Hypercubes, Mo Mu, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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Description Of Semilog, Ryan Stanisfer, Chul Hung, Andrew B. Whinston, Parthasarathy Bhasker Feb 1989

Description Of Semilog, Ryan Stanisfer, Chul Hung, Andrew B. Whinston, Parthasarathy Bhasker

Department of Computer Science Technical Reports

No abstract provided.

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Preemptive Ensemble Motion Planning On A Tree, Gred N. Frederickson, D. J. Guan Feb 1989

Preemptive Ensemble Motion Planning On A Tree, Gred N. Frederickson, D. J. Guan

Department of Computer Science Technical Reports

No abstract provided.

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