Pub Date : 1994-04-10DOI: 10.1109/SECON.1994.324309
V. Prasad
The reliability of various digital systems are discussed, and an equation for the reliability function is obtained using Markov model with three parameters.<>
讨论了各种数字系统的可靠性，利用三参数马尔可夫模型得到了可靠性函数的表达式。
{"title":"A reliability function in the three dimensional parametric space and the study of digital systems","authors":"V. Prasad","doi":"10.1109/SECON.1994.324309","DOIUrl":"https://doi.org/10.1109/SECON.1994.324309","url":null,"abstract":"The reliability of various digital systems are discussed, and an equation for the reliability function is obtained using Markov model with three parameters.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130563648","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 : 1994-04-10DOI: 10.1109/SECON.1994.324294
B. Zoghi, T. C. Lyster, R. Puckett
The pioneering work over 50 years ago by M.I.T. faculty who wrote textbooks for the study of electrical sciences set the pattern for the study of electric circuits in the United States. Authors who developed textbooks after those early works largely followed the techniques advanced there. This paper extends the analytical procedures adopted for identifying current direction and voltage polarities in a circuit. While the M.I.T. works adopted an arrow to indicate current direction, a similar arrow symbol for voltage was not adopted. Double subscript notation identifying nodes and relative polarity was used instead. This notation has contributed to confusion of students who are learning electric circuits. A simpler designation of voltage polarity by an open-head arrow promotes a better understanding of electric circuit operation. This paper proposes the use of a closed-head arrow for current direction, and an open-head arrow for a voltage rise between nodes. In this method all voltages are rises only. All voltages can be drawn in a voltage map of a circuit, using open-head arrows to show both voltage rises from sources of emf and voltage rises across resistors caused by Ohm's law relationships. This proposed method for identifying voltages corresponds with the node voltage polarity terminology used to interpret results from computer software programs such as PSPICE. A consistent conformity with symbols in circuit analysis is an enhancement to learning for the beginning student of electric circuit analysis. The voltage map is such a learning enhancement.<>
{"title":"Voltage maps simplify electric circuit analysis","authors":"B. Zoghi, T. C. Lyster, R. Puckett","doi":"10.1109/SECON.1994.324294","DOIUrl":"https://doi.org/10.1109/SECON.1994.324294","url":null,"abstract":"The pioneering work over 50 years ago by M.I.T. faculty who wrote textbooks for the study of electrical sciences set the pattern for the study of electric circuits in the United States. Authors who developed textbooks after those early works largely followed the techniques advanced there. This paper extends the analytical procedures adopted for identifying current direction and voltage polarities in a circuit. While the M.I.T. works adopted an arrow to indicate current direction, a similar arrow symbol for voltage was not adopted. Double subscript notation identifying nodes and relative polarity was used instead. This notation has contributed to confusion of students who are learning electric circuits. A simpler designation of voltage polarity by an open-head arrow promotes a better understanding of electric circuit operation. This paper proposes the use of a closed-head arrow for current direction, and an open-head arrow for a voltage rise between nodes. In this method all voltages are rises only. All voltages can be drawn in a voltage map of a circuit, using open-head arrows to show both voltage rises from sources of emf and voltage rises across resistors caused by Ohm's law relationships. This proposed method for identifying voltages corresponds with the node voltage polarity terminology used to interpret results from computer software programs such as PSPICE. A consistent conformity with symbols in circuit analysis is an enhancement to learning for the beginning student of electric circuit analysis. The voltage map is such a learning enhancement.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"118 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132147119","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 : 1994-04-10DOI: 10.1109/SECON.1994.324293
J. Tucker, M. Tapia
A new procedure is presented for solving equations in the two-valued Boolean algebra. The method has the advantage of expressing a general solution using the minimum number of binary parameters. The method guarantees that the complete set of all particular solutions can be generated from this general solution by assigning each parameter a value of either 0 or 1. The technique is presented using Karnaugh maps, but could easily be implemented in software.<>
{"title":"Minimum parameter solution of switching equations","authors":"J. Tucker, M. Tapia","doi":"10.1109/SECON.1994.324293","DOIUrl":"https://doi.org/10.1109/SECON.1994.324293","url":null,"abstract":"A new procedure is presented for solving equations in the two-valued Boolean algebra. The method has the advantage of expressing a general solution using the minimum number of binary parameters. The method guarantees that the complete set of all particular solutions can be generated from this general solution by assigning each parameter a value of either 0 or 1. The technique is presented using Karnaugh maps, but could easily be implemented in software.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132147271","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 : 1994-04-10DOI: 10.1109/SECON.1994.324334
L. Garcia, O. Mohammed
This paper presents a new approach to power load forecasting using artificial neural networks (ANN). Based on weather conditions and past history of load consumption, a load forecast is made by the utility companies to deliver the appropriate load to its customers. Power systems operation and planning functions such as unit commitment, security analysis, state estimation, etc. are benefited with an accurate load forecast. Improving the accuracy of the load forecast can save a significant amount of money. Artificial neural networks permit adaptability to climate changes compared to other forecasting methods in use. The results obtained by using ANN have been found to give better results than other conventional techniques.<>
{"title":"Forecasting peak loads with neural networks","authors":"L. Garcia, O. Mohammed","doi":"10.1109/SECON.1994.324334","DOIUrl":"https://doi.org/10.1109/SECON.1994.324334","url":null,"abstract":"This paper presents a new approach to power load forecasting using artificial neural networks (ANN). Based on weather conditions and past history of load consumption, a load forecast is made by the utility companies to deliver the appropriate load to its customers. Power systems operation and planning functions such as unit commitment, security analysis, state estimation, etc. are benefited with an accurate load forecast. Improving the accuracy of the load forecast can save a significant amount of money. Artificial neural networks permit adaptability to climate changes compared to other forecasting methods in use. The results obtained by using ANN have been found to give better results than other conventional techniques.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115075605","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 : 1994-04-10DOI: 10.1109/SECON.1994.324345
C. Lindquist, June-Ming Shen
An adaptive detection filter detects the presence of a desired signal in noisy environment. In this paper, we present several detection filtering algorithms in the time domain. Our algorithm's vector forms are compared with gradient search methods include Newton, steepest descent and least-mean-square. We find that our algorithms are of the Newton-type.<>
{"title":"New adaptive detection filters using Newton-type algorithms","authors":"C. Lindquist, June-Ming Shen","doi":"10.1109/SECON.1994.324345","DOIUrl":"https://doi.org/10.1109/SECON.1994.324345","url":null,"abstract":"An adaptive detection filter detects the presence of a desired signal in noisy environment. In this paper, we present several detection filtering algorithms in the time domain. Our algorithm's vector forms are compared with gradient search methods include Newton, steepest descent and least-mean-square. We find that our algorithms are of the Newton-type.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127116415","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 : 1994-04-10DOI: 10.1109/SECON.1994.324285
J.S. Park, Y. Jiang, T. Hesketh, D. Clements
Considers an adaptive control algorithm for robot manipulators. The presented algorithm uses an adaptive sliding mode control law to ensure robustness. The proposed algorithms eliminate the requirement for inversion of the inertia matrix, the requirement for measurement of joint acceleration, and the requirement for calculation of a regressor. Computer simulation results show good properties of the proposed algorithm under large manipulator parameter uncertainties and disturbances.<>
{"title":"Trajectory control of manipulators using adaptive sliding mode control","authors":"J.S. Park, Y. Jiang, T. Hesketh, D. Clements","doi":"10.1109/SECON.1994.324285","DOIUrl":"https://doi.org/10.1109/SECON.1994.324285","url":null,"abstract":"Considers an adaptive control algorithm for robot manipulators. The presented algorithm uses an adaptive sliding mode control law to ensure robustness. The proposed algorithms eliminate the requirement for inversion of the inertia matrix, the requirement for measurement of joint acceleration, and the requirement for calculation of a regressor. Computer simulation results show good properties of the proposed algorithm under large manipulator parameter uncertainties and disturbances.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127578063","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 : 1994-04-10DOI: 10.1109/SECON.1994.324291
M. Kolbehdari
This paper presents a finite-element method of numerical analysis for a system of a shielded cylindrical coupled microstrip transmission lines. The complete polynomial field of the high order element up to fourth is used in this study. The microstrip line consists of two coupled dielectric circular cylinders characterized by permittivity /spl epsiv//sub 1/ and /spl epsiv//sub 2/ and partially embedded in the ground plane. The two infinitesimally thin strips with arbitrary size are clad on the coupled dielectric circular cylinders. The coupling between the two conducting strips of the coupled microstrip line is investigated. The first and higher order elements are used in the finite-element method to calculate for the quasi-static potential and the corresponding field distribution in the microstrip line. The capacitance per unit length of the line is obtained from a variational expression and the effective dielectric constant, characteristic impedance, and phase velocity are also computed. A perturbational method is used to calculate the losses due to conductor and dielectric dissipation.<>
{"title":"Quasi-static characteristic of a shielded cylindrical coupled microstrip transmission line by finite-element method","authors":"M. Kolbehdari","doi":"10.1109/SECON.1994.324291","DOIUrl":"https://doi.org/10.1109/SECON.1994.324291","url":null,"abstract":"This paper presents a finite-element method of numerical analysis for a system of a shielded cylindrical coupled microstrip transmission lines. The complete polynomial field of the high order element up to fourth is used in this study. The microstrip line consists of two coupled dielectric circular cylinders characterized by permittivity /spl epsiv//sub 1/ and /spl epsiv//sub 2/ and partially embedded in the ground plane. The two infinitesimally thin strips with arbitrary size are clad on the coupled dielectric circular cylinders. The coupling between the two conducting strips of the coupled microstrip line is investigated. The first and higher order elements are used in the finite-element method to calculate for the quasi-static potential and the corresponding field distribution in the microstrip line. The capacitance per unit length of the line is obtained from a variational expression and the effective dielectric constant, characteristic impedance, and phase velocity are also computed. A perturbational method is used to calculate the losses due to conductor and dielectric dissipation.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128410639","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 : 1994-04-10DOI: 10.1109/SECON.1994.324265
M. Azar, C. Ventrice
Based on the laser Doppler anemometry technique and Mie scattering theory, the visibility-particle size relationship (visibility profile) is computed for spherical particles of complex index of refraction. The analysis is restricted to the backscatter direction, for incident light that is circularly polarized. It is observed that the shape of the visibility profile is greatly influenced by the index of refraction of the particle and the optical parameters of the system. The effect that the optical parameters, such as beam angular separations (/spl Psi/), collecting aperture size (R), and off-axis collecting angle (/spl Phi//sub 0/), have on the visibility profiles is examined. It is established that the visibility technique is useful for particle sizing under limited values of the optical parameters. It is found that particle sizing is feasible for values of /spl Psi/ ranging from 9.5/spl deg/ to 1.0/spl deg/, and for values of R ranging from 4.0/spl deg/ to 14.0/spl deg/. It is observed, in many cases, that moving the collecting aperture slightly off-axis improves the quality of the visibility profile for particle sizing.<>
{"title":"Effect of system optical configuration on visibility profiles for circularly polarized backscattered laser beam","authors":"M. Azar, C. Ventrice","doi":"10.1109/SECON.1994.324265","DOIUrl":"https://doi.org/10.1109/SECON.1994.324265","url":null,"abstract":"Based on the laser Doppler anemometry technique and Mie scattering theory, the visibility-particle size relationship (visibility profile) is computed for spherical particles of complex index of refraction. The analysis is restricted to the backscatter direction, for incident light that is circularly polarized. It is observed that the shape of the visibility profile is greatly influenced by the index of refraction of the particle and the optical parameters of the system. The effect that the optical parameters, such as beam angular separations (/spl Psi/), collecting aperture size (R), and off-axis collecting angle (/spl Phi//sub 0/), have on the visibility profiles is examined. It is established that the visibility technique is useful for particle sizing under limited values of the optical parameters. It is found that particle sizing is feasible for values of /spl Psi/ ranging from 9.5/spl deg/ to 1.0/spl deg/, and for values of R ranging from 4.0/spl deg/ to 14.0/spl deg/. It is observed, in many cases, that moving the collecting aperture slightly off-axis improves the quality of the visibility profile for particle sizing.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114522203","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 : 1994-04-10DOI: 10.1109/SECON.1994.324296
K. Karimi, V. Aalo, H. Helmken
Rain attenuation is the most dominant cause of signal degradation in satellite links operating at Ka-band. This is a particularly serious issue for ground terminal stations located in a sub-tropical region such as state of Florida. Presently, most rain compensation algorithms are based on the use of a fixed, large fade margin to combat occasional deep fades. However, the use of a fixed margin, especially for a rainy region, results in an inefficient use of channel capacity for a high percentage of the time. This paper uses an adaptive rain fade counter-measure based on the effective utilization of the channel capacity for several Florida locations with links operating in the Ka-band. In order to determine the outage rates both in terms of channel capacity and BER, Manning's (1990) rain attenuation prediction model, based on the rain history of the transmitting and receiving stations has been employed.<>
{"title":"A study of satellite channel utilization in the presence of rain attenuation in Florida","authors":"K. Karimi, V. Aalo, H. Helmken","doi":"10.1109/SECON.1994.324296","DOIUrl":"https://doi.org/10.1109/SECON.1994.324296","url":null,"abstract":"Rain attenuation is the most dominant cause of signal degradation in satellite links operating at Ka-band. This is a particularly serious issue for ground terminal stations located in a sub-tropical region such as state of Florida. Presently, most rain compensation algorithms are based on the use of a fixed, large fade margin to combat occasional deep fades. However, the use of a fixed margin, especially for a rainy region, results in an inefficient use of channel capacity for a high percentage of the time. This paper uses an adaptive rain fade counter-measure based on the effective utilization of the channel capacity for several Florida locations with links operating in the Ka-band. In order to determine the outage rates both in terms of channel capacity and BER, Manning's (1990) rain attenuation prediction model, based on the rain history of the transmitting and receiving stations has been employed.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123216396","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 : 1994-04-10DOI: 10.1109/SECON.1994.324302
W. L. Peterson, S. R. Brammer, S.O. Elder
This paper presents a Lagrangian relaxation based technique for solving the power system thermal unit commitment problem. The specific technique described in this paper focuses on finding a feasible commitment, then attempting to improve on the optimality of the solution. A new method for processing ramp rate constraints is also introduced. The algorithm has been implemented on a large scale power system.<>
{"title":"A new method for unit ramp rate processing in Lagrangian relaxation unit commitment","authors":"W. L. Peterson, S. R. Brammer, S.O. Elder","doi":"10.1109/SECON.1994.324302","DOIUrl":"https://doi.org/10.1109/SECON.1994.324302","url":null,"abstract":"This paper presents a Lagrangian relaxation based technique for solving the power system thermal unit commitment problem. The specific technique described in this paper focuses on finding a feasible commitment, then attempting to improve on the optimality of the solution. A new method for processing ramp rate constraints is also introduced. The algorithm has been implemented on a large scale power system.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116405097","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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