Proceedings of SOUTHEASTCON '94最新文献

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A reliability function in the three dimensional parametric space and the study of digital systems 三维参数空间中的可靠性函数及数字系统的研究
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324309
V. Prasad
{"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}
引用次数: 0
Voltage maps simplify electric circuit analysis 电压图简化了电路分析
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324294
B. Zoghi, T. C. Lyster, R. Puckett
{"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}
引用次数: 3
Minimum parameter solution of switching equations 切换方程的最小参数解
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324293
J. Tucker, M. Tapia
{"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}
引用次数: 4
Forecasting peak loads with neural networks 神经网络预测峰值负荷
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324334
L. Garcia, O. Mohammed
{"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}
引用次数: 3
New adaptive detection filters using Newton-type algorithms 使用牛顿型算法的新型自适应检测滤波器
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324345
C. Lindquist, June-Ming Shen
{"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}
引用次数: 0
Trajectory control of manipulators using adaptive sliding mode control 基于自适应滑模控制的机械臂轨迹控制
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324285
J.S. Park, Y. Jiang, T. Hesketh, D. Clements
{"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}
引用次数: 9
Quasi-static characteristic of a shielded cylindrical coupled microstrip transmission line by finite-element method 用有限元法研究屏蔽圆柱耦合微带传输线的准静态特性
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324291
M. Kolbehdari
{"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}
引用次数: 3
Effect of system optical configuration on visibility profiles for circularly polarized backscattered laser beam 系统光学结构对圆偏振后向散射激光束可见性的影响
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324265
M. Azar, C. Ventrice
{"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}
引用次数: 0
An investigation of the variation of leakage resistance of electrical insulating materials used on spacecraft power systems 航天器电力系统用电绝缘材料泄漏电阻变化规律的研究
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324304
G. A. Ford, C. Doreswamy, P. Bassapa
{"title":"An investigation of the variation of leakage resistance of electrical insulating materials used on spacecraft power systems","authors":"G. A. Ford, C. Doreswamy, P. Bassapa","doi":"10.1109/SECON.1994.324304","DOIUrl":"https://doi.org/10.1109/SECON.1994.324304","url":null,"abstract":"Spacecraft power systems are subjected to extremely hostile environments, due to the action of space plasma, temperature cycling and atomic oxygen. Literature indicates that the resistivity is sensitive to ambient temperature and pressure. The resistivity is an index which can indicate the performance of space based electrical systems. Hence, there is a need for experiments to determine the variation of leakage resistance with temperature and pressure. The surface leakage resistance, and volume resistance of Kapton H and V and Mylar films of 2 mils and 5 mils thickness were determined. The leakage resistance measurements were made according to ASTM D257. The experiments were conducted in a vacuum chamber with electrode temperatures ranging from 27/spl deg/ Centigrade to 140/spl deg/ Centigrade, and pressures varying from atmospheric to 10 millitorr at a voltage of 500 V.<<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":"116620662","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}
引用次数: 0
Static converter: didactic support software 静态转换器:教学支持软件
Proceedings of SOUTHEASTCON '94 Pub Date : 1994-04-10 DOI: 10.1109/SECON.1994.324324
L.C. Origa de Oliveira, R.U. Pennafiel
{"title":"Static converter: didactic support software","authors":"L.C. Origa de Oliveira, R.U. Pennafiel","doi":"10.1109/SECON.1994.324324","DOIUrl":"https://doi.org/10.1109/SECON.1994.324324","url":null,"abstract":"Teaching a course of special electric loads in a continuing education program to power engineers is a difficult task because they are not familiarized with switching topology circuits. Normally, in a typical program, many hours are dedicated to explain the thyristors switching sequence and to draw the power converter currents and terminal voltages waveforms for different operative conditions. This work presents teaching support software in order to optimize the time spent in this task and, mainly, to benefit the assimilation of the proposed subjects, studying the static power converter under different nonideal operative conditions.<<ETX>>","PeriodicalId":119615,"journal":{"name":"Proceedings of SOUTHEASTCON '94","volume":"33 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":"122113896","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}
引用次数: 0
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