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[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory最新文献

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Complexity comparison between FFT and DCT based real data Wigner processors 基于FFT和DCT的实际数据Wigner处理器的复杂度比较
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17086
J. Wilbur
{"title":"Complexity comparison between FFT and DCT based real data Wigner processors","authors":"J. Wilbur","doi":"10.1109/SSST.1988.17086","DOIUrl":"https://doi.org/10.1109/SSST.1988.17086","url":null,"abstract":"The symmetry of the discrete Wigner distribution (DWD) kernel input and the corresponding DWD output is used to develop an N-point DWD processor that outputs two DWD slices per N/2-point fast Fourier transform (FFT) subsystem. The overhead associated with FFT size reduction and kernel generation are shown to be less than that of the short-time Fourier transform magnitude (STFTM), given an equivalent reduction in FFT size, and the conclusion of double throughput for the DWD over that of the STFTM is validated. An alternative discrete-cosine-transform-based DWD processor is proposed where factorization is performed directly on the cosine matrix and compared in terms of computational complexity to radix-two, radix-four, and radix-2/4 FFT-based DWD processors.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124780243","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
Thermal analysis of electrical transmission cables in space 太空输电电缆的热分析
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17029
D. C. Walters, D. W. Russell
{"title":"Thermal analysis of electrical transmission cables in space","authors":"D. C. Walters, D. W. Russell","doi":"10.1109/SSST.1988.17029","DOIUrl":"https://doi.org/10.1109/SSST.1988.17029","url":null,"abstract":"The electrical transmission lines from an electrical power source to a remote space station must be designed to transmit the required power without overheating. The power losses in the conductors are conducted through the insulation to the surface and at the surface radiated to space. A steady-state analysis is made which considers the line to be continually exposed to the sun's rays. This results in a two dimensional analysis with nonlinear equations. Finite difference equations are used to approximate the equations in a computer program named THERM. The program considers the resistance of the conductor to be a function of the conductor temperature. The general equations used in the program are included.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125306227","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: 1
Triangulation of surface points with cameras and projectors 用照相机和投影仪对表面点进行三角测量
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17071
J. Labuz
{"title":"Triangulation of surface points with cameras and projectors","authors":"J. Labuz","doi":"10.1109/SSST.1988.17071","DOIUrl":"https://doi.org/10.1109/SSST.1988.17071","url":null,"abstract":"Several surface mapping techniques using beam-beam and sheet-beam triangulation with a pattern projector and an electronic camera are presented and compared. The techniques are grouped according the methods they use to circumvent the correspondence problem inherent to optical triangulation systems. These methods are referred to as 'time coding', 'shape coding', and 'color coding'. The common term 'coding' refers to the fact that the correspondence information is coded in a particular fashion for simpler decoding during processing. Also presented is a basic Venn diagram showing the relationship between four typical categories of 3D scene analysis.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121059212","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: 1
On the relation between transfer matrices and polynomial fractional representations of linear continuous-time time-varying systems 线性连续时变系统的传递矩阵与多项式分数表示的关系
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17008
H. Tai, S. Singh, I. Hoballah
{"title":"On the relation between transfer matrices and polynomial fractional representations of linear continuous-time time-varying systems","authors":"H. Tai, S. Singh, I. Hoballah","doi":"10.1109/SSST.1988.17008","DOIUrl":"https://doi.org/10.1109/SSST.1988.17008","url":null,"abstract":"Using the framework of E. Emre et al. (1982), an explicit relationship between transfer matrices and (right or left) polynomial fractional representations of linear continuous-time time-varying systems is given. The authors also show that the matrix (pI-F) for the time-varying system Sigma =(F,G,H) has a left inverse over a skew ring.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121197167","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: 2
A weighted tree model for algorithms with Boolean vector operands 布尔向量操作数算法的加权树模型
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17033
Jie Wu, E. Fernández
{"title":"A weighted tree model for algorithms with Boolean vector operands","authors":"Jie Wu, E. Fernández","doi":"10.1109/SSST.1988.17033","DOIUrl":"https://doi.org/10.1109/SSST.1988.17033","url":null,"abstract":"Algorithms for fault tolerance decisions e.g., reconfiguration, deciding that a system is faulty, etc., frequently use operations with operands which are Boolean vectors. The bits in these vectors may represent, for example that a process or processor is up or down. Four common types of operations present in these algorithms are AND, OR, BMV (Boolean majority voting), and MASK. The authors show that by using the concept of weight of an operand, one can evaluate the structure of this type of algorithm with respect to how trustworthy their decisions are or evaluate the effect of a given input operand.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116457327","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
Application of the discrete Kalman filter for radar pointing error reduction 离散卡尔曼滤波在雷达指向误差减小中的应用
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17133
J. Walls, M. Greene, J. Stensby
{"title":"Application of the discrete Kalman filter for radar pointing error reduction","authors":"J. Walls, M. Greene, J. Stensby","doi":"10.1109/SSST.1988.17133","DOIUrl":"https://doi.org/10.1109/SSST.1988.17133","url":null,"abstract":"A recently proposed method of reducing target glint errors in radar systems using extended Kalman filtering is further enhanced with the development of a discrete target model and discrete Kalman filter (DKF) that includes clutter effects. Simulation results demonstrating the DKF are presented, and the limits of the usefulness of this method are investigated. The major advantage of the DKF is investigated. The major advantage of the DKF is that it can be implemented in software in the radar's digital processor, offering greater flexibility than continuous-time filters.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126003355","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
Power system state estimate on a personal computer 个人电脑上的电力系统状态估计
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17054
R. B. McManis, M. C. Clapp, A. Girgis
{"title":"Power system state estimate on a personal computer","authors":"R. B. McManis, M. C. Clapp, A. Girgis","doi":"10.1109/SSST.1988.17054","DOIUrl":"https://doi.org/10.1109/SSST.1988.17054","url":null,"abstract":"The authors present the implementation of a power-system state estimator on a personal computer. The method uses a weighted-least-squares (WLS) algorithm to estimate the system unknowns. The program was developed in two parts. Part one uses only the real and reactive line flows as measurements. Part two adds the measurement of bus voltage magnitudes, bus real and reactive injected power, and line-current magnitudes. The convergence rates of these two methods are compared.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127090152","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
Jittered sampling: a nonseparable three dimensional model 抖动采样:一个不可分离的三维模型
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17028
J.B. Kolsko
{"title":"Jittered sampling: a nonseparable three dimensional model","authors":"J.B. Kolsko","doi":"10.1109/SSST.1988.17028","DOIUrl":"https://doi.org/10.1109/SSST.1988.17028","url":null,"abstract":"The author show that three-dimensional spatiotemporal jittered sampling is not a direct extension of jittered sampling in one dimension. A model is developed in which the periodicity of the single-frame sampling function as well as the time to scan each picture element is taken into account. As a result, the power-spectral density of the sampled image consists of replications of the original image spectrum weighted by coefficients whose magnitude is governed by the jitter probability density function and the pattern used to obtain the image samples. This weighting can be utilized to reduce aliasing due to undersampled frequency components.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122279559","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: 1
Digital optical arithmetic processor based on symbolic substitution 基于符号替换的数字光学算术处理机
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1117/12.948580
H. Jeon, M. Abushagur
{"title":"Digital optical arithmetic processor based on symbolic substitution","authors":"H. Jeon, M. Abushagur","doi":"10.1117/12.948580","DOIUrl":"https://doi.org/10.1117/12.948580","url":null,"abstract":"The authors propose a digital optical arithmetic processor based on symbolic substitution using holographic matched and space-invariant filters. The proposed system performs Boolean logic, binary addition, and subtraction in a highly parallel manner, depending on the substitution rules for each operation. The processing time depends on the word size but not on the array size. Substitution rules for binary subtraction with conventional binary number representation are presented, and some advantages over other parallel arithmetic processing methods are discussed. Crosstalk in symbolic substitution and the operating principles of the proposed system are also described.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128130142","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: 6
Application of normal distribution in modeling global irradiation 正态分布在模拟全局辐照中的应用
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17096
K. Ashenayi, S. Singh, I. Hoballah
{"title":"Application of normal distribution in modeling global irradiation","authors":"K. Ashenayi, S. Singh, I. Hoballah","doi":"10.1109/SSST.1988.17096","DOIUrl":"https://doi.org/10.1109/SSST.1988.17096","url":null,"abstract":"The utility of the normal distribution curve in modeling hourly global radiation is presented and discussed. It is shown that nonzero hourly insolation values for each day can be represented by the variance of the normal distribution curve and total daily insolation. It is shown that using the normal distribution curve for representing hourly insolation values does not cause a significant loss of information content. The mean of the normal distribution curve is taken at solar noon. The variance of the normal curve is then calculated from the recorded data by matching the recorded value and the value obtained from the normal distribution curve at solar noon. This approach provides a simple and easy method for estimating hourly radiation and eliminates the need for large digital computers. It is shown that 24 hourly insolation values can be represented by four variables, namely, total daily insolation, variance of the normal distribution curve, and the times of sunrise and sunset.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128412491","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: 5
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