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Recirculation of input data in frequency-domain adaptive filtering 频域自适应滤波中输入数据的循环
Canadian Electrical Engineering Journal Pub Date : 1987-07-01 DOI: 10.1109/CEEJ.1987.6593827
S. Chern, K. Wong
{"title":"Recirculation of input data in frequency-domain adaptive filtering","authors":"S. Chern, K. Wong","doi":"10.1109/CEEJ.1987.6593827","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6593827","url":null,"abstract":"The recirculation of input data is proposed in the application of frequency-domain adaptive filtering when the supply of input data is limited. An analysis of the performance of such an algorithm is presented and it indicates that superior performance can be achieved. Examples of its applications in adaptive filtering confirm the results of analysis and demonstrate the effectiveness of the proposed algorithm.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123933885","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
Long-term optimal operation of series-parallel reservoirs for critical period with specified monthly generation 月发电量规定的关键时期串并联水库长期优化调度
Canadian Electrical Engineering Journal Pub Date : 1987-07-01 DOI: 10.1109/CEEJ.1987.6593831
S. Soliman, G. Christensen
{"title":"Long-term optimal operation of series-parallel reservoirs for critical period with specified monthly generation","authors":"S. Soliman, G. Christensen","doi":"10.1109/CEEJ.1987.6593831","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6593831","url":null,"abstract":"This paper presents an attractive and efficient approach to solve the long-term optimal operating problems of multireservoir power systems for critical water conditions. The systems described in this paper are characterized by a variable monthly load. This load is equal to a certain percentage from the total hydrogeneration at the end of the year. The authors construct a cost functional which penalizes state (storage) and control (release) variables. The cost functional is augmented by using Lagrange and Kuhn-Tucker multipliers to adjoin the equality and inequality constraints. The problem is formulated as a minimum norm problem in the framework of functional analysis optimization technique. A new set of optimal equation is obtained. Numerical results are reported for a real system in operation consisting of two rivers, with each river having two series reservoirs.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115159144","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
Approach to a suitable directional antenna for UHF radio positioning applications 一种适合超高频无线电定位应用的定向天线
Canadian Electrical Engineering Journal Pub Date : 1987-07-01 DOI: 10.1109/CEEJ.1987.6593830
J. Tranquilla, S. Best
{"title":"Approach to a suitable directional antenna for UHF radio positioning applications","authors":"J. Tranquilla, S. Best","doi":"10.1109/CEEJ.1987.6593830","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6593830","url":null,"abstract":"The phase centre properties of log-periodic dipole (LPD) arrays are examined for suitability in UHF radio positioning systems and are compared with phase properties of commonly used Yagi arrays. LPD arrays offer gain nearly comparable to that obtained from short Yagis, exhibit nearly 180° main lobe coverage with no front quadrant nulls and show very small phase centre movement over the entire front hemisphere.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114984512","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
A fast and exact method for real-time overhead conductor ampacity evaluation 一种快速、准确的架空导线实时电容量评估方法
Canadian Electrical Engineering Journal Pub Date : 1987-07-01 DOI: 10.1109/CEEJ.1987.6593832
E. D. Crainic, X. Do, P. Meyere
{"title":"A fast and exact method for real-time overhead conductor ampacity evaluation","authors":"E. D. Crainic, X. Do, P. Meyere","doi":"10.1109/CEEJ.1987.6593832","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6593832","url":null,"abstract":"The paper presents a new method to evaluate conductor ampacity which combines accuracy and rapidity. With the proposed model, the conductor temperature in a large number of lines can be evaluated in real-time using a computer and a centralized data acquisition system.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123963782","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
Conditionally optimal state estimation for systems governed by difference equations 差分方程控制系统的条件最优状态估计
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592805
J. Raol, N. Sinha
{"title":"Conditionally optimal state estimation for systems governed by difference equations","authors":"J. Raol, N. Sinha","doi":"10.1109/CEEJ.1987.6592805","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592805","url":null,"abstract":"The problem of estimation of the states of nonlinear systems described by difference equations is considered in a rather general setting and conditionally optimal filters are obtained. Several general and special cases are studied and methods of computation of the optimal gains and selection of the structural functions of these estimators are discussed. The computations of the gains can be carried out before collecting the measurement data, rendering the processing of these data very simple.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123263474","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
General response formulae for Fornasini-Marchesini's models with variable coefficients 变系数Fornasini-Marchesini模型的一般响应公式
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592804
T. Kaczorek
{"title":"General response formulae for Fornasini-Marchesini's models with variable coefficients","authors":"T. Kaczorek","doi":"10.1109/CEEJ.1987.6592804","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592804","url":null,"abstract":"Fornasini-Marchesini's models, Roesser's model and general 2-D system model with variable coefficients are considered. A new definition of the transition matrix for the second Fornasini-Marchesini's model with variable coefficients is presented. General response formulae for first and second Fornasini-Marchesini's models with variable coefficients are derived.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126849447","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
Array factor considerations of space-fed planar phased arrays 空间馈电平面相控阵的阵列因素考虑
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592803
K. Sudhakar Rao, L. Shafai
{"title":"Array factor considerations of space-fed planar phased arrays","authors":"K. Sudhakar Rao, L. Shafai","doi":"10.1109/CEEJ.1987.6592803","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592803","url":null,"abstract":"The array factor analysis of a planar phased array fed with a scalar horn is described. The effect of quantization and collimation phase errors on the space factor of the array is studied and it is noted that the collimation phase error of space-fed arrays can be utilized to reduce the sidelobe levels considerably. Further, a simple and computationally efficient analysis for the array factor of space-fed rectangular arrays is described.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132008769","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
Wiener Filters for the restoration of radiographs 维纳滤光片复原
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592802
G. Mitsiadis, A. Venetsanopoulos
{"title":"Wiener Filters for the restoration of radiographs","authors":"G. Mitsiadis, A. Venetsanopoulos","doi":"10.1109/CEEJ.1987.6592802","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592802","url":null,"abstract":"A new model of the radiologic process is developed. The model is based on a block diagram representation involving a nonlinear transformation. The optimal linear filter, in the mean square error sense (Wiener), retrieves information from a certain layer of the exposed object. It is derived by considering the contribution of the other layers as additive noise. Closed-form expressions are given for special cases to illustrate the filter behaviour for low and high frequencies. It is shown that the filter can be determined even if the focal spot is modelled as a point source. The effect of the distortion caused by the focal spot is found to be minimal compared to that of the superposition of the images produced by the other layers of the object. Experimental results show that optimal filtering exhibits improved performance over inverse filtering, which was previously used in a similar application.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127331040","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
Effects of induction motor load on the transient performance of a power system 感应电机负载对电力系统暂态性能的影响
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592807
G. Berg, H. Truong
{"title":"Effects of induction motor load on the transient performance of a power system","authors":"G. Berg, H. Truong","doi":"10.1109/CEEJ.1987.6592807","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592807","url":null,"abstract":"Effects of system frequency fluctuations on the performance of an induction motor load in stability studies are simulated. A modelling technique involving this type of load is presented. The model takes into account all major transient electrical/mechanical effects and also recognizes system frequency variations during power system disturbances. Application of this modelling technique in a single generator/load system is carried out and comparisons between results for the constant and variable frequency cases are given.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114818986","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
Shunt reactors as counter measure for reactive power surplus: Location and impact on system stability performance 并联电抗器作为无功剩余的对策:位置及其对系统稳定性能的影响
Canadian Electrical Engineering Journal Pub Date : 1987-04-01 DOI: 10.1109/CEEJ.1987.6592808
A. Al-Ohaly, Z. Elrazaz
{"title":"Shunt reactors as counter measure for reactive power surplus: Location and impact on system stability performance","authors":"A. Al-Ohaly, Z. Elrazaz","doi":"10.1109/CEEJ.1987.6592808","DOIUrl":"https://doi.org/10.1109/CEEJ.1987.6592808","url":null,"abstract":"Presents a new criterion for shunt reactor location selection. This criterion is based directly upon the total reactive power absorbed by the rotating units. The impact of both the inductive VAr compensation location and magnitude upon the transient stability performance of a recent fast developing power system is given. Moreover, the coordination among these SVC reactors has been investigated. Comparison with previously published work is given and the results show the superiority of the newly developed criterion.","PeriodicalId":282137,"journal":{"name":"Canadian Electrical Engineering Journal","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131976908","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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