Pub Date : 1994-05-23DOI: 10.1109/NAECON.1994.332893
D. Parker, P. Schuessler
Best Commercial Practice, "COTS", ruggedized plastic packaging, HAST, encapsulation, etc. To those of us that are deep into the latest trend to cost reduce the microelectronics devices as used by the DoD and civilian/military space programs, these terms as well as the reliability limits they infer are fairly well understood, or are they? This paper presents an overview of the reliability data and its sources which have allowed the DoD device supplier to venture into the world of non-hermetic device technologies. The discussion presented at times unfortunately appears to conjure up the old question about the origins of the chicken or the egg. We live in a dynamic society and yet we require our program officers and contract administrators to lock down, in definitive terms, all of the requirements for performance and reliability necessary for each and every project we engage upon. Meanwhile we demand change so that the systems become smaller, lighter, faster and still be reliable. This indeed becomes a very difficult set of marching orders. Yet these changes will occur and the customer will still get the quality and reliability he seeks.<>
{"title":"Commercial electronics in DoD applications: the minimum requirements","authors":"D. Parker, P. Schuessler","doi":"10.1109/NAECON.1994.332893","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332893","url":null,"abstract":"Best Commercial Practice, \"COTS\", ruggedized plastic packaging, HAST, encapsulation, etc. To those of us that are deep into the latest trend to cost reduce the microelectronics devices as used by the DoD and civilian/military space programs, these terms as well as the reliability limits they infer are fairly well understood, or are they? This paper presents an overview of the reliability data and its sources which have allowed the DoD device supplier to venture into the world of non-hermetic device technologies. The discussion presented at times unfortunately appears to conjure up the old question about the origins of the chicken or the egg. We live in a dynamic society and yet we require our program officers and contract administrators to lock down, in definitive terms, all of the requirements for performance and reliability necessary for each and every project we engage upon. Meanwhile we demand change so that the systems become smaller, lighter, faster and still be reliable. This indeed becomes a very difficult set of marching orders. Yet these changes will occur and the customer will still get the quality and reliability he seeks.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115736713","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332959
M. Liang, Shi-xi Wang, Youqing Luo
In this paper, the problem of fast learning algorithm for multi-layered feedforward neural network (MLFNN) is discussed. A new fast backpropagation (FB-P) learning algorithm is proposed, By the analysis of FB-P learning algorithm, a modified FB-P (MFB-P) learning algorithm is presented. Simulations are run with the problem of XOR for B-P, FB-P and MFB-P, and the corresponding results indicate that MFB-P or FB-P converges much more quickly than B-P and MFB-P has much better generalization than FB-P or B-P.<>
{"title":"Fast learning algorithms for multi-layered feedforward neural network","authors":"M. Liang, Shi-xi Wang, Youqing Luo","doi":"10.1109/NAECON.1994.332959","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332959","url":null,"abstract":"In this paper, the problem of fast learning algorithm for multi-layered feedforward neural network (MLFNN) is discussed. A new fast backpropagation (FB-P) learning algorithm is proposed, By the analysis of FB-P learning algorithm, a modified FB-P (MFB-P) learning algorithm is presented. Simulations are run with the problem of XOR for B-P, FB-P and MFB-P, and the corresponding results indicate that MFB-P or FB-P converges much more quickly than B-P and MFB-P has much better generalization than FB-P or B-P.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115880976","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332890
S. Sporn
The present world wide system of Air Traffic Control universally depends on an information exchange involving ground radar observations and cooperative application of rules and procedures by pilots in the air and controllers on the ground. The chief function of the controller is to keep traffic moving while "assuring" no conflicts or mid air collisions. In areas of dense traffic the controller "workload" can get very high and one becomes concerned about the system(controller is part of the system) becoming overloaded, with consequent decrease in system safety. The concept of controller or system workload is intuitively understood but how does one measure workload for the purpose of classifying system safety and achieving proper system design? One needs to define a model of the situation. Air traffic has previously been described by analogy with the random motion of gas molecules (Alexander and Graham-Orr) but these descriptions have left out from the beginning (by the random assumption) the essential feature of control. Associated with using the random gas model one assumes that controller workload is proportional to the number of conflicts the controller must resolve. Though predictions made from the random gas model check reasonably with some results obtained from computer simulations, doubts arise when one questions how a random model can describe the real world controlled air traffic situation with its obvious lack of randomness (Jones and Lutze) and one asks, more precisely, for the limitations of the random gas model. The purpose of this paper is to provide an alternate mathematical model for air traffic control; one in which the element of control is built in from the beginning thus overcoming a basic objection to the random gas model. The model is based on the recognition that whatever the controller "does" to achieve and maintain control, his work effort is perceived by an observer as a decrease in the entropy of the traffic, e.g., the traffic becomes more orderly. The controller functions in direct analogy with Maxwell's Demon. Faced with a disordered velocity and position distribution of aircraft in a control zone, the air traffic controller introduces order by supplying information so as to achieve a decrease in entropy. Controller workload is measured by the information (negentropy) he must supply.<>
{"title":"The air traffic controller and Maxwell's Demon","authors":"S. Sporn","doi":"10.1109/NAECON.1994.332890","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332890","url":null,"abstract":"The present world wide system of Air Traffic Control universally depends on an information exchange involving ground radar observations and cooperative application of rules and procedures by pilots in the air and controllers on the ground. The chief function of the controller is to keep traffic moving while \"assuring\" no conflicts or mid air collisions. In areas of dense traffic the controller \"workload\" can get very high and one becomes concerned about the system(controller is part of the system) becoming overloaded, with consequent decrease in system safety. The concept of controller or system workload is intuitively understood but how does one measure workload for the purpose of classifying system safety and achieving proper system design? One needs to define a model of the situation. Air traffic has previously been described by analogy with the random motion of gas molecules (Alexander and Graham-Orr) but these descriptions have left out from the beginning (by the random assumption) the essential feature of control. Associated with using the random gas model one assumes that controller workload is proportional to the number of conflicts the controller must resolve. Though predictions made from the random gas model check reasonably with some results obtained from computer simulations, doubts arise when one questions how a random model can describe the real world controlled air traffic situation with its obvious lack of randomness (Jones and Lutze) and one asks, more precisely, for the limitations of the random gas model. The purpose of this paper is to provide an alternate mathematical model for air traffic control; one in which the element of control is built in from the beginning thus overcoming a basic objection to the random gas model. The model is based on the recognition that whatever the controller \"does\" to achieve and maintain control, his work effort is perceived by an observer as a decrease in the entropy of the traffic, e.g., the traffic becomes more orderly. The controller functions in direct analogy with Maxwell's Demon. Faced with a disordered velocity and position distribution of aircraft in a control zone, the air traffic controller introduces order by supplying information so as to achieve a decrease in entropy. Controller workload is measured by the information (negentropy) he must supply.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115976893","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332841
J. S. Hasting, M. McFarren
The authors have developed software routines to produce 3-D images that can be used with any application. Each graphics application tends to have unique features such as the size of objects being drawn or the coordinate system in which these objects are displayed. For example, one application may display objects such as aircraft in a situational display while another displays aircraft system status information. Clearly, coordinate systems and object sizes will differ between these two applications. The stereographic software techniques described are compatible with any coordinate system or size of object and are also compatible with other graphic transformations such as rotation and translation. Stereographic theory is explained in the context of these software procedures as applied in a study of a 3-D situational display. Ultimately, the combination of this software and respective explanation will enable any user to develop and display 3-D images, reliably placing graphic objects in space.<>
{"title":"3-D cockpit simulator displays-achieving precise depth placement of objects in graphic images","authors":"J. S. Hasting, M. McFarren","doi":"10.1109/NAECON.1994.332841","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332841","url":null,"abstract":"The authors have developed software routines to produce 3-D images that can be used with any application. Each graphics application tends to have unique features such as the size of objects being drawn or the coordinate system in which these objects are displayed. For example, one application may display objects such as aircraft in a situational display while another displays aircraft system status information. Clearly, coordinate systems and object sizes will differ between these two applications. The stereographic software techniques described are compatible with any coordinate system or size of object and are also compatible with other graphic transformations such as rotation and translation. Stereographic theory is explained in the context of these software procedures as applied in a study of a 3-D situational display. Ultimately, the combination of this software and respective explanation will enable any user to develop and display 3-D images, reliably placing graphic objects in space.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130964335","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332895
W. J. Eggington, P. M. Stevens
The paper addresses Cyclocraft, a unique aircraft concept, being developed under the sponsorship of USAF, WPAFB, ASC/XR, and Department of Energy. The Cyclocraft utilizes both aerostatic and aerodynamic lift. It has exceptional operational flexibility and economy, and can be designed for any payload size, e.g. up to 100 tons. Functions of the Cyclocraft's components are described and results of developmental work, including night tests, are presented. The work for the USAF focused on unmanned missions of long endurance, e.g. 24 to 120 hours without refueling, and with nominal payloads, e.g. 400 to 2000 lb. The design of the unmanned Cyclocraft, its performance and operational economics are addressed. Potential missions for Cyclocraft, its mission cost effectiveness and platform/electronic systems interface are discussed. UAV Cyclocraft missions include Theater Missile Defense (TMD), Wide Area Intrusion Detection Surveillance (WAIDS), Special Operations Delivery and Recovery and Communications Relay. Results of the DOE program, which addressed low altitude transport of heavy cargoes, e.g. 45 tons, in areas where heavy surface transport is prohibitive, e.g. Louisiana wetlands, are also discussed. Potential applications for manned heavy-lift Cyclocraft, for both government and commerce, and its cost effectiveness are explored.<>
{"title":"The Cyclocraft and its applications","authors":"W. J. Eggington, P. M. Stevens","doi":"10.1109/NAECON.1994.332895","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332895","url":null,"abstract":"The paper addresses Cyclocraft, a unique aircraft concept, being developed under the sponsorship of USAF, WPAFB, ASC/XR, and Department of Energy. The Cyclocraft utilizes both aerostatic and aerodynamic lift. It has exceptional operational flexibility and economy, and can be designed for any payload size, e.g. up to 100 tons. Functions of the Cyclocraft's components are described and results of developmental work, including night tests, are presented. The work for the USAF focused on unmanned missions of long endurance, e.g. 24 to 120 hours without refueling, and with nominal payloads, e.g. 400 to 2000 lb. The design of the unmanned Cyclocraft, its performance and operational economics are addressed. Potential missions for Cyclocraft, its mission cost effectiveness and platform/electronic systems interface are discussed. UAV Cyclocraft missions include Theater Missile Defense (TMD), Wide Area Intrusion Detection Surveillance (WAIDS), Special Operations Delivery and Recovery and Communications Relay. Results of the DOE program, which addressed low altitude transport of heavy cargoes, e.g. 45 tons, in areas where heavy surface transport is prohibitive, e.g. Louisiana wetlands, are also discussed. Potential applications for manned heavy-lift Cyclocraft, for both government and commerce, and its cost effectiveness are explored.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131063461","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332832
C.A. Pflasterer, D. Haldeman
This paper investigates the use of emulators for computer testing and integration applications in comparison with application specific computers. The performance requirements of each application are identified and evaluated against a variety of emulator implementation approaches. The relative emulator development cost, production cost, and performance levels are compared to flight computers and evaluated for key roles in trainer and OFP Integration Support Facilities (ISF).<>
{"title":"Computer emulator applications","authors":"C.A. Pflasterer, D. Haldeman","doi":"10.1109/NAECON.1994.332832","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332832","url":null,"abstract":"This paper investigates the use of emulators for computer testing and integration applications in comparison with application specific computers. The performance requirements of each application are identified and evaluated against a variety of emulator implementation approaches. The relative emulator development cost, production cost, and performance levels are compared to flight computers and evaluated for key roles in trainer and OFP Integration Support Facilities (ISF).<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114139513","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332865
R. Williams, J. Westerkamp
A new adaptive filtering algorithm (the modified P-vector algorithm) and special multistage filter structure was developed to resolve epoch-by-epoch variations in single epoch evoked responses. The evoked responses were first modeled as the sum of three signal components; a constant ensemble average (M) across all epochs, noise (N), and an epoch-by-epoch stochastic signal variation (Q). A two stage time sequenced adaptive filter structure decouples the M and Q components of each new signal vector. The result is improved convergence performance. The modified P-vector algorithm (mPa) was developed to eliminate the need for a separate desired signal. As a result, the filter input can also be used as the desired or training signal. The mPa adaptive filter was tested using simulated and human data sets. The mPa filter was able to resolve signal variations on an epoch-by-epoch basis.<>
{"title":"Single epoch adaptive estimation of evoked potentials using the modified p-vector algorithm","authors":"R. Williams, J. Westerkamp","doi":"10.1109/NAECON.1994.332865","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332865","url":null,"abstract":"A new adaptive filtering algorithm (the modified P-vector algorithm) and special multistage filter structure was developed to resolve epoch-by-epoch variations in single epoch evoked responses. The evoked responses were first modeled as the sum of three signal components; a constant ensemble average (M) across all epochs, noise (N), and an epoch-by-epoch stochastic signal variation (Q). A two stage time sequenced adaptive filter structure decouples the M and Q components of each new signal vector. The result is improved convergence performance. The modified P-vector algorithm (mPa) was developed to eliminate the need for a separate desired signal. As a result, the filter input can also be used as the desired or training signal. The mPa adaptive filter was tested using simulated and human data sets. The mPa filter was able to resolve signal variations on an epoch-by-epoch basis.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114928465","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332831
M. Storer, R. Logan, Chong Yu, E. Grantonic, D. Churchman
The United States Navy Program Executive Office for Tactical Aircraft Programs is developing an Airborne Tactical Information Management System (ATIMS) capability under the Space and Naval Warfare Systems Command (SPAWAR-32) Real Time Support for Joint Power Projection Advanced Technology Demonstration (ATD) program. The ATIMS project is leveraging modular processing, advanced display and virtual reality technology to demonstrate a capability that provides enhanced flight situation awareness of engagement parameters, exploitation of information for mission alternative selection and more responsive unit level mission planning and rehearsal. The ATIMS project is focused on developing tactical information management and cockpit automation technology to simultaneously reduce pilot workload, reduce system avionics cost, enhance operational flexibility and increase mission effectiveness for air-to-air or air-to-ground combat operations. In a cooperative effort with the Air Force Avionics Directorate, Wright Laboratory (WL/AART-3), the In-Cockpit Mission Replanning and Rehearsal (ICMRR) program is providing ATIMS concept development, long-term master planning and technology demonstration integration support.<>
{"title":"Airborne tactical information management system in-cockpit mission replanning and rehearsal (ATIMS/ICMRR)","authors":"M. Storer, R. Logan, Chong Yu, E. Grantonic, D. Churchman","doi":"10.1109/NAECON.1994.332831","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332831","url":null,"abstract":"The United States Navy Program Executive Office for Tactical Aircraft Programs is developing an Airborne Tactical Information Management System (ATIMS) capability under the Space and Naval Warfare Systems Command (SPAWAR-32) Real Time Support for Joint Power Projection Advanced Technology Demonstration (ATD) program. The ATIMS project is leveraging modular processing, advanced display and virtual reality technology to demonstrate a capability that provides enhanced flight situation awareness of engagement parameters, exploitation of information for mission alternative selection and more responsive unit level mission planning and rehearsal. The ATIMS project is focused on developing tactical information management and cockpit automation technology to simultaneously reduce pilot workload, reduce system avionics cost, enhance operational flexibility and increase mission effectiveness for air-to-air or air-to-ground combat operations. In a cooperative effort with the Air Force Avionics Directorate, Wright Laboratory (WL/AART-3), the In-Cockpit Mission Replanning and Rehearsal (ICMRR) program is providing ATIMS concept development, long-term master planning and technology demonstration integration support.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123824288","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332968
J.A. Uphaus, R. Bryant
This research focuses on the design and development of a software package to aid display designers in creating fault tolerant fonts and symbology for monochrome dot-matrix displays. Since dot-matrix displays are subject to non-catastrophic failures [rows, columns, and individual picture elements], display designers find it necessary to address hardware reliability as a key design element when avoidance of operator reading errors is mission critical. This paper addresses row and column failure modes. Building redundancy into the design of font characters and symbology can provide additional protection from reading errors. The software package developed for the design of fault tolerant fonts, referred to herein as FontTool, operates on an IBM PC or compatible hardware platform within a Microsoft DOS environment. FontTool can simulate row or column dot-matrix display failures and "predict" likely human reading errors. Based on limited testing, FontTool reading error "predictions" were found to be consistent with actual human performance reading error data about 86% of the time. FontTool uses Euclidean distance between 2-D Fourier transformed representations of dot-matrix characters as a metric for predicting character "similarity". Although this metric has been applied previously, FontTool is a major advance in aiding display designers to build more fault tolerant cockpit display symbology.<>
{"title":"An innovative tool for designing fault tolerant cockpit display symbology","authors":"J.A. Uphaus, R. Bryant","doi":"10.1109/NAECON.1994.332968","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332968","url":null,"abstract":"This research focuses on the design and development of a software package to aid display designers in creating fault tolerant fonts and symbology for monochrome dot-matrix displays. Since dot-matrix displays are subject to non-catastrophic failures [rows, columns, and individual picture elements], display designers find it necessary to address hardware reliability as a key design element when avoidance of operator reading errors is mission critical. This paper addresses row and column failure modes. Building redundancy into the design of font characters and symbology can provide additional protection from reading errors. The software package developed for the design of fault tolerant fonts, referred to herein as FontTool, operates on an IBM PC or compatible hardware platform within a Microsoft DOS environment. FontTool can simulate row or column dot-matrix display failures and \"predict\" likely human reading errors. Based on limited testing, FontTool reading error \"predictions\" were found to be consistent with actual human performance reading error data about 86% of the time. FontTool uses Euclidean distance between 2-D Fourier transformed representations of dot-matrix characters as a metric for predicting character \"similarity\". Although this metric has been applied previously, FontTool is a major advance in aiding display designers to build more fault tolerant cockpit display symbology.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122091884","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332953
R. Hardie, K. Barner, A. Sarhan
A class of nonlinear filters called rank conditioned rank selection (RCRS) filters is developed and analyzed in this paper. The RCRS filters are developed within the general framework of rank selection (RS) filters, which are filters constrained to output an order statistic from the observation set. The information used by the RCRS filters to select an output rank is the ranks of selected input samples, hence the name rank conditioned rank selection filters.<>
{"title":"Selection filters for signal restoration","authors":"R. Hardie, K. Barner, A. Sarhan","doi":"10.1109/NAECON.1994.332953","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332953","url":null,"abstract":"A class of nonlinear filters called rank conditioned rank selection (RCRS) filters is developed and analyzed in this paper. The RCRS filters are developed within the general framework of rank selection (RS) filters, which are filters constrained to output an order statistic from the observation set. The information used by the RCRS filters to select an output rank is the ranks of selected input samples, hence the name rank conditioned rank selection filters.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115152440","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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