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检索条件"任意字段=Conference on Data Analysis and Modeling for Process Control II"

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DEPTH RECOVERY THROUGH ACTIVE control OF FOCAL LENGTH 8

DEPTH RECOVERY THROUGH ACTIVE CONTROL OF FOCAL LENGTH

引用

Mobile Robots ViiI conference

作者： MOBASSERI, B DORAISWAMY, S VILLANOVA UNIV DEPT ELECT & COMP ENGNVILLANOVAPA 19085

ISBN: (纸本)0819413232

In this work, we have proposed the use of flow not induced by motion but by active manipulation of the lens focal length. The sequence of images thus obtained are to a great extent equivalent to those generated by camera translation with several distinct advantages: (1) the platform undergoes no perturbation while capturing the image sequences, (2) focus of expansion (FOE) is theoretically constrained to be at the center of the image or close proximity for camera imperfection, and (3) the flow is radial and as a result the correspondence problem, so difficult elsewhere, reduces to a 1-D search problem.

关键词： Cameras Mobile robots Image processing Direct methods Image analysis Image restoration Imaging systems Motion models process modeling Computer engineering

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Computer aided design and graphics techniques for EVA analysis

Computer aided design and graphics techniques for EVA analys...

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24th International conference on Environmental Systems and 5th European Symposium on Space Environmental control Systems

作者： Price, Larry R. Fruhwirth, Michael A. Knutson, Jeffrey G. McDonnell Douglas Aerospace

The size and complexity of Space Station has driven the need for an accurate, reliable analytical tool to assess the extravehicular activity (EVA) crew interfaces at the worksite. On previous spacecraft, each worksite was developed and validated through Neutral Buoyancy underwater testing by the crew using mockups. For spacecraft requiring a significant amount of EVA over large areas, like Space Station, the cost of conducting underwater tests for each of the many hundred worksites becomes prohibitive. Therefore, limited testing must be augmented by accurate graphical analysis. The Unigraphics ii, which is the Computer Aided Design (CAD) system for the International Space Station Alpha (ISSA) Product Group 1 design, was selected and developed. It has a major advantage of easy and rapid access to the accurate and updated Space Station design. The design can be rapidly obtained electronically from layouts, detail drawings, assembly drawings or the Electronic Development Fixture (EDF). Also, it allows the structures and mechanical designers to do preliminary worksite layout on the same system they use for design. In addition, several separate models (files) for EVA constraints, support equipment and Extravehicular Mobility Units (EMUs) have been developed so that a particular worksite can be evaluated for access, reach, work envelope and viewing. It lacks some features that other graphics programs such as McDonnell Douglas Human modeling Systems (MDHMS) have, which are: animation, easy graphics manipulation and built in anthropometric data. This UGii technique has been developed and refined over several years (>100 worksites analyzed) and has achieved very high correlation to underwater tests results for worksites on the exterior of the truss. The use of this tool has become a routine but still informal part of the design process. Utilization for verification is another goal which will require further correlation testing utilizing neutral buoyancy and other micro gravi

关键词： Space stations

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modeling of test structures for efficient online defect monitoring using a digital tester

Modeling of test structures for efficient online defect moni...

引用

IEEE International conference on Microelectronic Test Structures

作者： C. Hess L.H. Weiland Institute of Computer Design and Fault Tolerance (Prof. Dr. D. Schmid) University of Karlsruhe Karlsruhe Germany

A novel methodology for digital measuring procedures and digital data analysis is presented in order to evaluate an online process control and defect monitoring. That can be done by manufacturing test chips side by side with standard chips and measuring them with the same measuring equipment-the digital tester. To achieve a fast and effective (efficient) measuring procedure and data analysis test structures will be modeled in geometry-graphs, neighborhood-graphs and connection-graphs.< >

关键词： Circuit testing Semiconductor device measurement Electrical resistance measurement Frequency measurement Measurement standards Conducting materials Circuit faults Computerized monitoring data analysis process control

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Intersociety Energy Conversion Engineering conference, 1994

Intersociety Energy Conversion Engineering Conference, 1994

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Intersociety Energy Conversion Engineering conference, 1994

The proceedings contain 329 papers. The special focus in this conference is on Intersociety Energy Conversion Engineering. The topics include: Enhancing access to space;nasa's advanced space transportation program;the four rivers energy project in clean coal v;space science mission power requirements and issues;utility battery storage applications;a comparison of several alternative fuels for fuel-cell vehicle applications;operating experience with a 10 KW hermetic stirling engine;stirling machine operating experience ii;a solar heated amtec spacecraft power system;integration of the topaz 2 space nuclear reactor with the nepstp spacecraft;high power communication satellites power systems study;sodium modulated amtec electrode deposition;alternative transportation fuels from biomass;enhanced nanoscale catalyst precursor powders generated using a flowthrough hydrothermal process;technology providing global energy solutions;air force nickel hydrogen cell low earth orbit life test update;spacecraft electrical power system environmental control and protection;tests of effectiveness of thermionic heat pipe modules;role of polystyrene on the product composition of solid wastes during thermal destruction;a 3d compressible Euler solver for turbomachinery cascades;propulsion-motor options in battery-powered electric bicycles;the utility-scale joint-venture program;status of MCFC technology at m-c power 1994;update on ESA nickel-cadmium life test data and an integrated analysis of the kalina cycle in combined cycles.

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analysis of impedance spectroscopy data: problems and new directions

Analysis of impedance spectroscopy data: problems and new di...

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Annual International conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： J.R. MacDonald Department of Physics and Astronomy North Carolina State University Chapel Hill NC USA

Summary form only given as follows: The author deals with the importance of analyzing impedance spectroscopy small-signal frequency-response data in ways which are appropriate to yield increased understanding of the underlying physico-chemical processes associated with the data and/or its use for process control and testing. Proper analysis requires complex nonlinear least squares fitting with appropriate weighting, and a well-developed computer program for such fitting is described. The value and power of such analysis is illustrated along with some of its problems. New analysis methods and interpretations are discussed which involve: (a) alternatives to Kronig-Kramers integral transformation; (b) new fitting models appropriate for solid materials; (c) ways of separating and understanding concomitant conduction-relaxation and dielectric-dispersion contributions to the overall response; and (d) estimation of distributions of relaxation times and barrier heights.< >

关键词： Electrochemical impedance spectroscopy Frequency process control Testing Least squares methods Solid modeling Conducting materials Dielectric materials

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Innovative network modeling and simulation tool

Innovative network modeling and simulation tool

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MILCOM, Military Communications conference

作者： G.V. Fink Adroit Systems Inc. Alexandria VA USA

The paper discusses the enhanced analysis and simulation capabilities provided by the Communications Network modeling Tool (CNMT) designed by Adroit Systems Inc. for Rome Laboratory, Rome NY. The CNMT is a software system that was developed to provide the National Air Intelligence Center (NAIC) of the Air Force with the ability to analyze telecommunications networks with greater efficiency and accuracy. The CNMT's primary information repository is the NAIC LINKS & NODES (L&N) Sybase database. data is imported from the L&N database into the CNMT system that was developed using the ARC/INFO geographic information system (GIS). CNMT allows the data to be displayed geographically with existing map data including vector World data Bank ii and ARC gigitized raster graphics images to enhance the visual relationship between the communications objects and their locations. The CNMT system users are able to develop telecommunications network models for different physical transmission media and overlay logical user network models representing C/sup 2/ chain-of-command hierarchies. Scenario generation provides a flexible, efficient process for defining and loading a combined network with voice and message traffic profiles. Simulation capabilities provide the capability to execute circuit switched and store and forward traffic simulation on network models using a COTS simulation tool (COMNET ii.5) to determine the network's performance characteristics. A collate and display results component provides the capability to further examine the network models and their simulation results.< >

关键词： Circuit simulation Image databases Geographic Information Systems Telecommunication traffic Traffic control Analytical models Communication networks Laboratories Software systems Intelligent networks

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Sampled-data GPC (SDGPC) with integral action: the state space approach

Sampled-data GPC (SDGPC) with integral action: the state spa...

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IEEE conference on Decision and control

作者： G. Lu G.A. Dumont Department of Electrical Engineering Pulp and Paper Centre University of British Columbia Vancouver BC Canada

In this paper, a sampled-data generalized predictive control (SDGPC) algorithm is developed. SDGPC is based on a continuous-time state space model with continuous-time quadratic cost function, but the projected future control scenario is assumed to be piecewise constant. In doing so, SDGPC can be implemented digitally without any approximation. By state augmentation, SDGPC produces integral action to track a constant setpoint with zero steady error subject to an unknown constant disturbance. Laguerre filter modeling concepts which have been popular recently in process industry can be integrated into this controller design readily and the resulting sampled-data Laguerre-based GPC (SDLGPC) is suitable for adaptive applications. The closed-loop stability of SDGPC is established and the relation between SDGPC and the discrete-time approach is analyzed. Some simulation examples are presented to illustrate the properties of SDGPC.< >

关键词： State-space methods Predictive control Prediction algorithms Cost function Adaptive filters Industrial control Industrial relations Programmable control Adaptive control Stability analysis

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Fitting a mixture-based response surface using computer simulation 94

Fitting a mixture-based response surface using computer simu...

引用

Simulation Winter conference

作者： L.K. Gaafar T.A. Aldowaisan Mechanical and Industrial Engineering Department College of Engineering and Petroleum Kuwait University Safat Kuwait

ISBN: (纸本)9780780321090

In this paper, an augmented simplex-lattice mixture design is used to fit a mathematical metamodel for predicting work in process in a flexible manufacturing cell. The average work in process is modeled as a response variable by varying the incoming percentages of different products. Computer simulation is utilized to run different experiments to obtain the required data for fitting the metamodel. The accuracy of the metamodel predictions warrant its use in place of the simulation model, thus eliminating the need for lengthy simulation runs and complicated output analysis. This work provides an example of the utility of mixture experiments in a discrete manufacturing environment.

关键词： Surface fitting Response surface methodology Computer simulation Polynomials Flexible manufacturing systems Computational modeling Predictive models Analytical models Centralized control Automatic control

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Force sensing from human demonstration: stiffness, impedance and kinesthetic sensibility

Force sensing from human demonstration: stiffness, impedance...

引用

IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： B.J. McCarragher Engineering Faculties Canberra ACT Australia

This paper presents an analysis of force and position data that were generated by a human demonstration of a complex and asymmetrical insertion task. The goal of this paper is to understand human sensing ability so as to apply similar techniques to robotics. The assembly process is modelled using hybrid dynamics which separates discrete states of contact and highlights the changes in contact as the essential parts of the process. The human was blindfolded and only had tactile sense available. Position, velocity and force data were recorded as generated by the human. Both stiffness and mechanical impedance are used to attempt to interpret the human generated data. Surprisingly, both of these methods are inadequate to describe any significant portions of the data. It is argued that classical approaches to the understanding of human manipulation skills are insufficient, and more advanced testing and analysis is needed to effectively understand human force sensing abilities.< >

关键词： Humans Impedance Force sensors Robot sensing systems Robotic assembly Power system modeling Testing Discrete event systems control systems data engineering

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A precedence graph model for real-time systems

A precedence graph model for real-time systems

引用

IEEE Annual International Computer Software and Applications conference (COMPSAC)

作者： C. Erbas M.M. Tanik Accelerator Systems Division Superconducting Super Collider Laboratory Dallas TX USA Department of Computer Science and Engineering Southern Methodist University Dallas TX USA

There is a need for systematic study of modeling and verification techniques for real-time systems to specify and verify the timing characteristics of such systems. We introduce a precedence graph model to specify and analyze the timing behavior of real-time systems. To be able to test our model's suitability in a realistic situation, we modeled some of the components of Solenoidal Detector Collaboration data Acquisition System, UNIDAQ (1993). Furthermore, we investigate the effectiveness of the model for timing analysis for multiprocessing and multiprogramming run-time environments.< >

关键词： Real time systems Timing Laboratories Detectors data acquisition Runtime environment Delay process control System testing Random access memory

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