Pub Date : 1992-11-16DOI: 10.1109/ICCS.1992.254894
V. Muralidharan, H. Lui
Various learning vector quantization (LVQ) algorithms proposed before have made use of the learning coefficient alpha (t) for obtaining convergence of training. The authors present a new method that can be to estimate the learning rate at alpha (t) from the input and codebook vectors directly and independent of the past history of alpha (t). The results of experiments done with real speech data with the algorithm are also reported.<>
{"title":"Automatic estimation of learning rate for LVQ networks","authors":"V. Muralidharan, H. Lui","doi":"10.1109/ICCS.1992.254894","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254894","url":null,"abstract":"Various learning vector quantization (LVQ) algorithms proposed before have made use of the learning coefficient alpha (t) for obtaining convergence of training. The authors present a new method that can be to estimate the learning rate at alpha (t) from the input and codebook vectors directly and independent of the past history of alpha (t). The results of experiments done with real speech data with the algorithm are also reported.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133304246","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254908
H. Lau, P.C.K. Liu, K.C. Li
The integration of satellite and terrestrial mobile communication systems demonstrates an immediate solution to enable a mobile satellite terminal (MT) to access the land mobile satellite system (LMSS) inside an urban area. The base stations of the terrestrial system will act as relay stations for the LMSS when the MT operates inside an urban area. Mathematical models are developed to simulate and analyse signals received at the MT in a Rayleigh-fading channel. The influence of level-crossing rate (LCR) and bit error probability (BEP) on the switching criteria for the integrated system are presented.<>
{"title":"Switching criteria of integrated satellite and terrestrial mobile system in Rayleigh-fading channels","authors":"H. Lau, P.C.K. Liu, K.C. Li","doi":"10.1109/ICCS.1992.254908","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254908","url":null,"abstract":"The integration of satellite and terrestrial mobile communication systems demonstrates an immediate solution to enable a mobile satellite terminal (MT) to access the land mobile satellite system (LMSS) inside an urban area. The base stations of the terrestrial system will act as relay stations for the LMSS when the MT operates inside an urban area. Mathematical models are developed to simulate and analyse signals received at the MT in a Rayleigh-fading channel. The influence of level-crossing rate (LCR) and bit error probability (BEP) on the switching criteria for the integrated system are presented.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133328046","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255014
M. Ikegami, T. Hattori, O. Minai, Masayoshi Tanaka
The paper describes template synthesis of digital retina chips (DRCs) for information coding and decoding, especially for static images. The coding (C-) and decoding (D-) are done by halftoning and reconstructing respectively. The output u* of the D-DRC can be regenerated to recognize the almost same original input u of the C-DRC. In order to reduce the error between the original gray image u and the reconstructed gray image u*, multibit dynamics is proposed considering the minimization of distortion.<>
{"title":"Binary representation of images with simulated retina filter","authors":"M. Ikegami, T. Hattori, O. Minai, Masayoshi Tanaka","doi":"10.1109/ICCS.1992.255014","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255014","url":null,"abstract":"The paper describes template synthesis of digital retina chips (DRCs) for information coding and decoding, especially for static images. The coding (C-) and decoding (D-) are done by halftoning and reconstructing respectively. The output u* of the D-DRC can be regenerated to recognize the almost same original input u of the C-DRC. In order to reduce the error between the original gray image u and the reconstructed gray image u*, multibit dynamics is proposed considering the minimization of distortion.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133389750","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255068
S. Mylonas, R. Comley
A signal processing model for the epileptic EEG is used to formulate an analysis model, based on linear prediction. This formulation is implemented as a number of adaptive filters and applied for the detection of epileptic spikes. The theory behind the method is explained and the implementation described. Results are presented and compared for two adaptive filter realizations. The computationally efficient algorithm can be implemented in real-time on a small microcomputer system for on-line analysis. Intermediate results produced by this method may be used for further analysis. Generalization for the detection of other EEG transients and the removal of artifacts can be achieved easily.<>
{"title":"Adaptive predictive modelling for the analysis of the epileptic EEG","authors":"S. Mylonas, R. Comley","doi":"10.1109/ICCS.1992.255068","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255068","url":null,"abstract":"A signal processing model for the epileptic EEG is used to formulate an analysis model, based on linear prediction. This formulation is implemented as a number of adaptive filters and applied for the detection of epileptic spikes. The theory behind the method is explained and the implementation described. Results are presented and compared for two adaptive filter realizations. The computationally efficient algorithm can be implemented in real-time on a small microcomputer system for on-line analysis. Intermediate results produced by this method may be used for further analysis. Generalization for the detection of other EEG transients and the removal of artifacts can be achieved easily.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133030848","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254981
S. Jayaprakash, C. Muthukrishnan
Reliability and efficiency are two important characteristics of a good distributed mutual exclusion algorithm. Efficiency is generally considered in terms of the number of message transfers required. Considering the reliability aspect, it is desirable that an algorithm should be 'fully fault tolerant', i.e. capable of providing failed node removal and restart facility. Raymond's algorithm is efficient and it needs only O(log N) messages to enter a critical section. The authors show that Raymond's algorithm is not fully fault-tolerant and improve it to provide fully fault-tolerant capability for the case of single node failure.<>
{"title":"An improved reliable distributed mutual exclusion algorithm","authors":"S. Jayaprakash, C. Muthukrishnan","doi":"10.1109/ICCS.1992.254981","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254981","url":null,"abstract":"Reliability and efficiency are two important characteristics of a good distributed mutual exclusion algorithm. Efficiency is generally considered in terms of the number of message transfers required. Considering the reliability aspect, it is desirable that an algorithm should be 'fully fault tolerant', i.e. capable of providing failed node removal and restart facility. Raymond's algorithm is efficient and it needs only O(log N) messages to enter a critical section. The authors show that Raymond's algorithm is not fully fault-tolerant and improve it to provide fully fault-tolerant capability for the case of single node failure.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116472266","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 : 1992-11-16DOI: 10.1109/ICCS.1992.254914
S. Kwong, W. Gang, C.H. Lee
A new pitch detection algorithm is presented. A new method is developed to lessen the influence of the cross-term on the performance of traditional time-frequency distribution. The relationship between the time-frequency and the traditional autocorrelation method is also discussed. Experimental results show that this new method can give satisfied estimation of pitch period.<>
{"title":"A pitch detection algorithm based on time-frequency analysis","authors":"S. Kwong, W. Gang, C.H. Lee","doi":"10.1109/ICCS.1992.254914","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254914","url":null,"abstract":"A new pitch detection algorithm is presented. A new method is developed to lessen the influence of the cross-term on the performance of traditional time-frequency distribution. The relationship between the time-frequency and the traditional autocorrelation method is also discussed. Experimental results show that this new method can give satisfied estimation of pitch period.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115350262","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255149
M.H. Er, Y. H. Sng
A new generalized sidelobe canceller (GSC) beamforming structure employing direction-of-arrival (DOA) estimation and null steering technique is presented. It has the advantages that the quiescent response of the beamformer can be closely maintained and that the adaptive dimension of the beamformer can be reduced to about half of that of the full processor. Theoretical justification on the proposed approach is given and the performance achieved is investigated via computer studies.<>
{"title":"A new GSC beamformer employing DOA estimation and null steering","authors":"M.H. Er, Y. H. Sng","doi":"10.1109/ICCS.1992.255149","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255149","url":null,"abstract":"A new generalized sidelobe canceller (GSC) beamforming structure employing direction-of-arrival (DOA) estimation and null steering technique is presented. It has the advantages that the quiescent response of the beamformer can be closely maintained and that the adaptive dimension of the beamformer can be reduced to about half of that of the full processor. Theoretical justification on the proposed approach is given and the performance achieved is investigated via computer studies.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116145464","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255028
Dingang Sheng, F. Qi
A full domain optimum neural network is proposed. A method of devising stable points firstly and basins of attraction latterly increases speed and correctness of image recognition. This paper proves the quality and speed of convergence and invariance of mapping. Several computer simulation examples involving trained and recognized targets illustrate the usefulness of the method.<>
{"title":"An FDO neural network model and its application to image recognition","authors":"Dingang Sheng, F. Qi","doi":"10.1109/ICCS.1992.255028","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255028","url":null,"abstract":"A full domain optimum neural network is proposed. A method of devising stable points firstly and basins of attraction latterly increases speed and correctness of image recognition. This paper proves the quality and speed of convergence and invariance of mapping. Several computer simulation examples involving trained and recognized targets illustrate the usefulness of the method.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115398774","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255116
A. Lazar, W. Choe, K. Fairchild, N. Hern
The authors discuss research in the use of virtual-reality technology as a new interface paradigm for monitoring and controlling networks. They describe the prototype system that has been built in support.<>
作者讨论了使用虚拟现实技术作为监测和控制网络的新接口范例的研究。它们描述了在支持下构建的原型系统。
{"title":"Exploiting virtual reality for network management","authors":"A. Lazar, W. Choe, K. Fairchild, N. Hern","doi":"10.1109/ICCS.1992.255116","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255116","url":null,"abstract":"The authors discuss research in the use of virtual-reality technology as a new interface paradigm for monitoring and controlling networks. They describe the prototype system that has been built in support.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115589169","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 : 1992-11-16DOI: 10.1109/ICCS.1992.255043
J. Senior, D.E. Asumu, L. Bickers, T. Finegan
Details are presented of a software package which combines the theoretical models developed in the course of a research programme with experimental data obtained from devices used in U.K. field trials of fibre in the local access network. This package could provide a rapid prototyping test-bed on which the early design and planning of the access network could be structured. The limits of optical network performance in the key areas of power budget and return loss can be assessed readily using the package as part of the design and planning process.<>
{"title":"Optical fibre local access network software tools","authors":"J. Senior, D.E. Asumu, L. Bickers, T. Finegan","doi":"10.1109/ICCS.1992.255043","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255043","url":null,"abstract":"Details are presented of a software package which combines the theoretical models developed in the course of a research programme with experimental data obtained from devices used in U.K. field trials of fibre in the local access network. This package could provide a rapid prototyping test-bed on which the early design and planning of the access network could be structured. The limits of optical network performance in the key areas of power budget and return loss can be assessed readily using the package as part of the design and planning process.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121284108","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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