Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161069
L. Novak
The use of high-resolution radar measurement data (35 GHz) from four ground vehicles (bulldozer, Dodge Power Wagon, Dodge Van, and Camaro) to evaluate the performance of several 1D and 2D classifiers is discussed. The 1D classifiers use high-resolution range profiles to classify targets; the 2D classifier uses high-resolution inverse synthetic aperture radar (ISAR) images to classify targets. Classification performance results using the 1D and 2D algorithms are presented, and it is shown that the 2D algorithm performed best.<>
{"title":"A comparison of 1D and 2D algorithms for radar target classification","authors":"L. Novak","doi":"10.1109/ICSYSE.1991.161069","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161069","url":null,"abstract":"The use of high-resolution radar measurement data (35 GHz) from four ground vehicles (bulldozer, Dodge Power Wagon, Dodge Van, and Camaro) to evaluate the performance of several 1D and 2D classifiers is discussed. The 1D classifiers use high-resolution range profiles to classify targets; the 2D classifier uses high-resolution inverse synthetic aperture radar (ISAR) images to classify targets. Classification performance results using the 1D and 2D algorithms are presented, and it is shown that the 2D algorithm performed best.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129954222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161112
A. McAulay, X. Xu, J. Wang
An optical implementation of a multilayer neural network by spatial light rebroadcaster (SLR) and microchannel spatial light modulation (MSLM) is presented. In the system, the SLR is used as a buffer, which is an optical storage material that can be written with an Ar laser and read with an IR laser. The MSLM has a very sharp low-level boundary, and is used for thresholding. Since SLR and MSLM are used to handle data and thresholding instead of using a computer, a high-speed processing system can be achieved. The speed limitation of the system is the response times of the SLR and MLSM.<>
{"title":"Optical implementation of a multi-layer neural network by SLR and MSLM","authors":"A. McAulay, X. Xu, J. Wang","doi":"10.1109/ICSYSE.1991.161112","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161112","url":null,"abstract":"An optical implementation of a multilayer neural network by spatial light rebroadcaster (SLR) and microchannel spatial light modulation (MSLM) is presented. In the system, the SLR is used as a buffer, which is an optical storage material that can be written with an Ar laser and read with an IR laser. The MSLM has a very sharp low-level boundary, and is used for thresholding. Since SLR and MSLM are used to handle data and thresholding instead of using a computer, a high-speed processing system can be achieved. The speed limitation of the system is the response times of the SLR and MLSM.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125093899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161109
J. Wang
Conditions of configuring feedforward neural networks without local minima are analyzed for both synchronous and asynchronous learning rules. Based on the analysis, a learning algorithm that integrates a synchronous-asynchronous learning rule with a dynamic configuration rule to train feedforward neural networks is presented. The theoretic analysis and numerical simulation reveal that the proposed learning algorithm substantially reduces the likelihood of local minimum solutions in supervised learning.<>
{"title":"Synchronous learning versus asynchronous learning in artificial neural networks","authors":"J. Wang","doi":"10.1109/ICSYSE.1991.161109","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161109","url":null,"abstract":"Conditions of configuring feedforward neural networks without local minima are analyzed for both synchronous and asynchronous learning rules. Based on the analysis, a learning algorithm that integrates a synchronous-asynchronous learning rule with a dynamic configuration rule to train feedforward neural networks is presented. The theoretic analysis and numerical simulation reveal that the proposed learning algorithm substantially reduces the likelihood of local minimum solutions in supervised learning.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"146 40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128715914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161087
G. Walker, N. Salem, M. Varghese, A. Fuchs, R. Mukundan
Numerical results in the feedback linearization of a double pendulum system are presented. Singularities in the vector field of the closed-loop system manifest themselves as numerical instabilities when the denominator of the linearizing control input is sufficiently small. In a practical example, such as balancing a two-link manipulator along an equilibrium manifold, a method to steer the system away from an ill-conditioned control law is suggested.<>
{"title":"Instabilities in the feedback linearization of a double inverted pendulum","authors":"G. Walker, N. Salem, M. Varghese, A. Fuchs, R. Mukundan","doi":"10.1109/ICSYSE.1991.161087","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161087","url":null,"abstract":"Numerical results in the feedback linearization of a double pendulum system are presented. Singularities in the vector field of the closed-loop system manifest themselves as numerical instabilities when the denominator of the linearizing control input is sufficiently small. In a practical example, such as balancing a two-link manipulator along an equilibrium manifold, a method to steer the system away from an ill-conditioned control law is suggested.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116394519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161157
H. Shertukde, L. Godbout, S. C. Elmurr
A methodology for estimating the magnitude of signals generally found in a high-count-rate (HCR) system is presented. An analog system which is presently used for estimating such HCR signals has a moderate resolution and poor throughput. In order to enhance these performance measures, a digital signal processor design which maximizes the signal-to-noise ratio (SNR) of the sequence of measurements is used. The signal to be considered is deterministic and assumed to be known, and is corrupted by colored noise due to inherent sensor imperfections and the environment. By using the digital filter the improvement in resolution is marginal, whereas the expected improvement in throughput is considerable. The performance of the digital signal processor is evaluated for a SNR value of approximately 65 dB.<>
{"title":"Estimation of high count rate signals with a digital filter","authors":"H. Shertukde, L. Godbout, S. C. Elmurr","doi":"10.1109/ICSYSE.1991.161157","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161157","url":null,"abstract":"A methodology for estimating the magnitude of signals generally found in a high-count-rate (HCR) system is presented. An analog system which is presently used for estimating such HCR signals has a moderate resolution and poor throughput. In order to enhance these performance measures, a digital signal processor design which maximizes the signal-to-noise ratio (SNR) of the sequence of measurements is used. The signal to be considered is deterministic and assumed to be known, and is corrupted by colored noise due to inherent sensor imperfections and the environment. By using the digital filter the improvement in resolution is marginal, whereas the expected improvement in throughput is considerable. The performance of the digital signal processor is evaluated for a SNR value of approximately 65 dB.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127450189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161140
D. Enns, H. Ozbay, A. Tannenbaum
The numerical computation of H/sup infinity / optimal controllers for an unstable aircraft model with a time delay is discussed. It is shown that the optimal H/sup infinity / controller for this infinite-dimensional model can be computed from a finite determinantal formula. The properties of the optimal controller are examined. For a particular choice of weights, it is shown with an example that the optimal controller is stable and continuous. Approximations of this controller and suboptimality of the controllers obtained from these approximations are shown.<>
{"title":"Numerical computation and approximations of H/sup infinity / optimal controllers for a 2-parameter distributed model of an unstable aircraft","authors":"D. Enns, H. Ozbay, A. Tannenbaum","doi":"10.1109/ICSYSE.1991.161140","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161140","url":null,"abstract":"The numerical computation of H/sup infinity / optimal controllers for an unstable aircraft model with a time delay is discussed. It is shown that the optimal H/sup infinity / controller for this infinite-dimensional model can be computed from a finite determinantal formula. The properties of the optimal controller are examined. For a particular choice of weights, it is shown with an example that the optimal controller is stable and continuous. Approximations of this controller and suboptimality of the controllers obtained from these approximations are shown.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132314294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161076
G. Radack, J. Jacobsohn, F. Merat
A method for representing and manipulating information on dimensioning and positioning within a feature-based environment for mechanical parts design is described. In the feature-based design paradigm, designs are constructed using form features which are high-level representations of part geometry, i.e. block, hole, slot, pocket, chamfer, fillet, etc. In the system discussed two modes of positioning form features are supported. The first is a layout mode, which allows the user to position form features relative to each other, in order to layout the general geometry of the part. The second is a dimensioning mode, in which the user specifies which dimensions on the part are critically important, and what they should be. The system completes the dimensioning on request, producing enough dimensions to generate an engineering drawing.<>
{"title":"Positioning features within the Rapid Design System","authors":"G. Radack, J. Jacobsohn, F. Merat","doi":"10.1109/ICSYSE.1991.161076","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161076","url":null,"abstract":"A method for representing and manipulating information on dimensioning and positioning within a feature-based environment for mechanical parts design is described. In the feature-based design paradigm, designs are constructed using form features which are high-level representations of part geometry, i.e. block, hole, slot, pocket, chamfer, fillet, etc. In the system discussed two modes of positioning form features are supported. The first is a layout mode, which allows the user to position form features relative to each other, in order to layout the general geometry of the part. The second is a dimensioning mode, in which the user specifies which dimensions on the part are critically important, and what they should be. The system completes the dimensioning on request, producing enough dimensions to generate an engineering drawing.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"122 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128695982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161097
S. Vestal
The use of formal scheduling models as a basis for constructing reusable code templates for real-time software is studied. Code templates in a particular language are developed hand-in-hand with formal scheduling models for those templates, where the formal models include necessary run-time or operating system overheads. The code templates can be adapted in ways that correspond to the parameters of the formal model (e.g. number and frequencies of tasks). Ultimately, both an analytic tool to predict system performance metrics and a code generator to produce executive software can be driven by a high-level specification of the tasks in a particular application. This approach is demonstrated for one formal model, rate monotonic scheduling, and one Ada code template.<>
{"title":"Model-based templates for real-time scheduling","authors":"S. Vestal","doi":"10.1109/ICSYSE.1991.161097","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161097","url":null,"abstract":"The use of formal scheduling models as a basis for constructing reusable code templates for real-time software is studied. Code templates in a particular language are developed hand-in-hand with formal scheduling models for those templates, where the formal models include necessary run-time or operating system overheads. The code templates can be adapted in ways that correspond to the parameters of the formal model (e.g. number and frequencies of tasks). Ultimately, both an analytic tool to predict system performance metrics and a code generator to produce executive software can be driven by a high-level specification of the tasks in a particular application. This approach is demonstrated for one formal model, rate monotonic scheduling, and one Ada code template.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114088476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161105
A. Dhawan, S. Lončarić, S. Ramachandran
The problem of selecting the pyramid level for optimal morphological processing of an image with a selected structuring element is considered. Each level in the image pyramid is eroded by a structuring element and the residue computed. The residues for all pyramid levels are normalized and compared in order to determine the optimal image pyramid level. A method for residue normalization considering the fundamental morphological operation, erosion, is presented. An optimal structuring element can be determined at the selected pyramid level on the basis of minimal residues, providing as complete a representation of the image as possible.<>
{"title":"Optimal multiresolution morphological image processing","authors":"A. Dhawan, S. Lončarić, S. Ramachandran","doi":"10.1109/ICSYSE.1991.161105","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161105","url":null,"abstract":"The problem of selecting the pyramid level for optimal morphological processing of an image with a selected structuring element is considered. Each level in the image pyramid is eroded by a structuring element and the residue computed. The residues for all pyramid levels are normalized and compared in order to determine the optimal image pyramid level. A method for residue normalization considering the fundamental morphological operation, erosion, is presented. An optimal structuring element can be determined at the selected pyramid level on the basis of minimal residues, providing as complete a representation of the image as possible.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127128115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/ICSYSE.1991.161163
K. Lou, T.-H. Fan
A root test for signal detection based on a family of autoregressive (AR) spectral estimates is evaluated. It is observed that the root test fails for the strong narrowband noise case and is asymptotically inconclusive. A ratio test is also studied. The two AR spectra with order n and 2n are dependent. since they use the same first n correlation information. It will be difficult to find the joint density function of the ratio of the two AR spectra above. An example is included.<>
{"title":"Testing hypothesis for signal detection","authors":"K. Lou, T.-H. Fan","doi":"10.1109/ICSYSE.1991.161163","DOIUrl":"https://doi.org/10.1109/ICSYSE.1991.161163","url":null,"abstract":"A root test for signal detection based on a family of autoregressive (AR) spectral estimates is evaluated. It is observed that the root test fails for the strong narrowband noise case and is asymptotically inconclusive. A ratio test is also studied. The two AR spectra with order n and 2n are dependent. since they use the same first n correlation information. It will be difficult to find the joint density function of the ratio of the two AR spectra above. An example is included.<<ETX>>","PeriodicalId":250037,"journal":{"name":"IEEE 1991 International Conference on Systems Engineering","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122080442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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