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Neural network construction via a linear program 通过线性程序构建神经网络
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.514163
M. Pollatschek
{"title":"Neural network construction via a linear program","authors":"M. Pollatschek","doi":"10.1109/EEIS.1995.514163","DOIUrl":"https://doi.org/10.1109/EEIS.1995.514163","url":null,"abstract":"A procedure with polynomial complexity is proposed to construct a feed-forward neural network with binary inputs and a single binary output. The problem is formulated as one in linear inequalities and is solved by a modification of the primal simplex algorithm. We claim that it finds an acceptably low number of artificial neurons in the hidden layer or, equivalently, the number of separating hyperplanes.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122651011","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
Optimal and sub-optimal source localization in a waveguide 波导中最优和次优源定位
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.514179
J. Tabrikian, H. Messer
{"title":"Optimal and sub-optimal source localization in a waveguide","authors":"J. Tabrikian, H. Messer","doi":"10.1109/EEIS.1995.514179","DOIUrl":"https://doi.org/10.1109/EEIS.1995.514179","url":null,"abstract":"In this paper, an optimal and a sub-optimal procedures for source localization in a waveguide are presented. We assume that the array consists of vertical and non-vertical sub-arrays. The performance of the sub-optimal procedure is evaluated analytically and numerically and is compared to the performance of the optimal one. The sub-optimal method involves a two dimensional search procedure instead of a three dimensional search in the optimal one. Numerical examples with channel parameters which are typical to shallow water source localization, show that the sub-optimal performance loss is 0-3 dB, depending on the scenario conditions.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117322366","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 framework for type system definition and manipulation in C++ c++中用于类型系统定义和操作的框架
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.513776
E. Reshef, J. Gil
{"title":"A framework for type system definition and manipulation in C++","authors":"E. Reshef, J. Gil","doi":"10.1109/EEIS.1995.513776","DOIUrl":"https://doi.org/10.1109/EEIS.1995.513776","url":null,"abstract":"Meta-programming sets its goal in treating programs as data objects, and as such, manipulating and modifying them. We describe a framework that provides an essential part of a meta-programming environment, namely types. We have implemented an extendible class library in C++ that presents types as first class values, and uses a simple syntax to allow easy definition, creation and manipulation of types. This poses a framework which can be used in several application domains, including language processing tools, database applications, and CASE tools.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116545095","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
Observation of a free-electron laser interaction in the UHF regime 超高频区自由电子激光相互作用的观察
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.513831
R. Drori, A. Shahadi, E. Jerby
{"title":"Observation of a free-electron laser interaction in the UHF regime","authors":"R. Drori, A. Shahadi, E. Jerby","doi":"10.1109/EEIS.1995.513831","DOIUrl":"https://doi.org/10.1109/EEIS.1995.513831","url":null,"abstract":"A free-electron laser (FEL) oscillator experiment operating with a low-energy (<4 keV), low-current (<0.5 A) pulsed electron beam is presented in this paper. In the table-top FEL oscillator constructed in our laboratory the electrons travel along a planar undulator and an axial magnetic field, and interact with TEM-mode electromagnetic waves. In this experiment, microwave output is observed at /spl sim/40 cm wavelength. This radiation is much longer than the undulator period (2 cm). To the best of our knowledge, this is the first demonstration of an FEL operation in the UHF regime. For electron beam energy of /spl sim/3 keV, we observe also microwave output at /spl sim/5 GHz. This emission is related to the cyclotron resonance due to the axial magnetic field. These experiments may lead to the development of new high-power UHF and microwave radiation sources.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122382065","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
A current source parallel inverter in steady-state operation 稳态工作的电流源并联逆变器
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.514171
A. Shenkman, M. Zarudi, I. Tchernina
{"title":"A current source parallel inverter in steady-state operation","authors":"A. Shenkman, M. Zarudi, I. Tchernina","doi":"10.1109/EEIS.1995.514171","DOIUrl":"https://doi.org/10.1109/EEIS.1995.514171","url":null,"abstract":"The steady-state behaviour of a current source parallel inverter loaded by a resonant circuit is discussed. The state equations are solved by applying the conditions of periodicity. The final results are obtained directly without following the transient changing cycle by cycle which starts with the first cycle. The analysis is based on the symmetrical and periodical behaviour of the inverter (it is assumed that the switching times of thyristors are equal). The advantage of this analysis is that the solution is achieved in a closed form. This method is illustrated by an example of a parallel resonant DC-to-AC inverter analysis in its steady-state operation. The results are also compared with those obtained by applying Fourier series analysis. In both methods the general expressions of the inductor current, capacitor voltage and the input/output power and efficiency as a dependency of the ratio between the switching period and the resonant period, are obtained. The region of the inverter stable behaviour (reliable thyristor switching) is determined.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125518014","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
Analytical and experimental analysis of processes in a single phase cycloconverter 单相循环变换器过程的分析与实验分析
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.514170
I. Katz, M. Slonim
{"title":"Analytical and experimental analysis of processes in a single phase cycloconverter","authors":"I. Katz, M. Slonim","doi":"10.1109/EEIS.1995.514170","DOIUrl":"https://doi.org/10.1109/EEIS.1995.514170","url":null,"abstract":"A new method is presented for the analysis of the steady-state and transient processes in single-phase cycloconverters, which are widely applied in industrial electronics. The z-transform is used to derive the equation governing the cycloconverter's current. Difference linear equations describing nonlinear processes in cycloconverters are found. An analytical solution of the problem is obtained. Physical experiments and numerical calculations have been carried out to verify the results and good agreement has been observed.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126404697","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
Domains of ferroresonance occurrence in voltage transformers with or without damping reactors 带或不带阻尼电抗器的电压互感器的铁磁谐振域
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.513786
D. Shein, S. Zissu
{"title":"Domains of ferroresonance occurrence in voltage transformers with or without damping reactors","authors":"D. Shein, S. Zissu","doi":"10.1109/EEIS.1995.513786","DOIUrl":"https://doi.org/10.1109/EEIS.1995.513786","url":null,"abstract":"This paper is aimed at investigating the circumstances under which ferroresonance is liable to occur in a 400 kV Gas Insulated Substation (GIS) equipped with inductive voltage transformers, and at establishing the efficiency of damping reactors connected to the secondary winding of these transformers in order to improve the damping of the ferroresonance or to avoid its appearance. The paper outlines the computational model. Various operational schemes liable to be driven into ferroresonance are taking into account. The ferroresonance occurrence domains, determined using the computational model, emphasize that the damping reactor efficiency depends on the value of the external serial resistor and on the various operational schemes.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133785148","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: 13
Robust control of uncertain resonant systems using pole-placement [discrete-time systems] 不确定谐振系统的极点配置鲁棒控制[离散时间系统]
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.513826
O. Kidron, A. Feuer
{"title":"Robust control of uncertain resonant systems using pole-placement [discrete-time systems]","authors":"O. Kidron, A. Feuer","doi":"10.1109/EEIS.1995.513826","DOIUrl":"https://doi.org/10.1109/EEIS.1995.513826","url":null,"abstract":"The growing demand for advanced control applications such as light flexible structures on the one hand, and the availability of increased computation power on the other, mark the trend to relax the requirements from mechanical systems and use more sophisticated control algorithms to maintain high performance with cheaper and lighter plants. In this work we present results which apply to design of resonant plants. An approximation of closed loop properties of low damping resonance is presented, together with a combined pole-placement transfer value equations. A design approach is suggested for determining the low frequency performance by pole specifications and the high frequency resonance handling by frequency domain considerations.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132269294","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
Encoding mismatch in lossy source compression 有损源压缩中的编码不匹配
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.513768
A. Lapidoth
{"title":"Encoding mismatch in lossy source compression","authors":"A. Lapidoth","doi":"10.1109/EEIS.1995.513768","DOIUrl":"https://doi.org/10.1109/EEIS.1995.513768","url":null,"abstract":"A source sequence is described by the index of the codeword in some codebook C that is closest to it according to the distortion measure d/sub 0/(x,x/spl circ//sub 1/). We study the distortion associated with reconstructing the source sequence so as to minimize the distortion measured by d/sub 1/(x,x/spl circ//sub 1/), which is in general different from d/sub 0/(x,x/spl circ//sub 0/). Using a random coding argument we derive an upper bound on the resulting distortion. Applying this bound to blocks of source symbols we construct a sequence of bounds which are shown to converge to the least distortion achievable in this setup. This solves the rate distortion dual of an open problem related to the mismatched capacity of channels. Addressing a different kind of mismatch, we also study mean-squared-error description of non-Gaussian sources with Gaussian codebooks. It is shown that the use of a Gaussian codebook to compress any ergodic source results in an average distortion which depends on the source only via its second moment. The hardest source to describe is the memoryless Gaussian source, and it is best described using a Gaussian codebook. Once a Gaussian codebook is used, we show that all sources of a given second moment become equally hard to describe.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127338995","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
Study of natural space radiation effects in semiconductor devices for selection of electronic parts 半导体器件中自然空间辐射效应的研究，用于电子元件的选择
Eighteenth Convention of Electrical and Electronics Engineers in Israel Pub Date : 1995-03-07 DOI: 10.1109/EEIS.1995.514196
J. Levinson, J. Barak, A. Akkerman, D. Zilberman, A. Zentner, D. David, Y. Lifshitz
{"title":"Study of natural space radiation effects in semiconductor devices for selection of electronic parts","authors":"J. Levinson, J. Barak, A. Akkerman, D. Zilberman, A. Zentner, D. David, Y. Lifshitz","doi":"10.1109/EEIS.1995.514196","DOIUrl":"https://doi.org/10.1109/EEIS.1995.514196","url":null,"abstract":"Studies at Soreq NRC related to space radiation effects on semiconductor devices (that may lead to the failure of electronic systems) are discussed. The infrastructure of Soreq used for these studies, including: (i) a database of radiation effects in electronic devices and (ii) test facilities, is described. Examples of tests manifesting the importance of acquiring data on devices of the specific lot to be used are given.","PeriodicalId":219797,"journal":{"name":"Eighteenth Convention of Electrical and Electronics Engineers in Israel","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117248522","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
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