发布求助
文献互助 智能选刊 最新文献

15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)最新文献

筛选
英文 中文
A survey of the graphic alternate method for Boolean functions simplification 布尔函数简化的图形替代方法综述
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.12
E. Romero-Aguirre, J. C. Murrieta-Lee
{"title":"A survey of the graphic alternate method for Boolean functions simplification","authors":"E. Romero-Aguirre, J. C. Murrieta-Lee","doi":"10.1109/CONIEL.2005.12","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.12","url":null,"abstract":"One of the most important steps in traditional digital circuit design is the reduction of the Boolean expression that describes the particular circuit design. An important tool to achieve the above is the Karnaugh-Vieth maps method. This method has been used for electronic engineering students. It gives a simple graphic layout that leads to a drastic reduction (although not exhaustive) for the final expression of moderate designs. One of the most important drawbacks of this method appears when there are more than 5 Boolean design variables. Here, the designed map becomes complex and susceptible to design errors. The present paper describes two simple and powerful methods for Boolean functions simplification for 5 or more variables: the variable entered maps (VEM) and the miniterms ring map (McCalla (1994)). A comparison between two mapping methods is also presented Finally, the importance of the use VEM and RMM in electronics engineering programs as tools for a previous step to learning, before taking or teaching advanced courses, where complex systems can be simplified, is shown.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121037740","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
Design of a multiple-point wireless remote data acquisition system for mobile applications 设计一个移动应用的多点无线远程数据采集系统
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.34
J. Talledo, J. C. Miranda
{"title":"Design of a multiple-point wireless remote data acquisition system for mobile applications","authors":"J. Talledo, J. C. Miranda","doi":"10.1109/CONIEL.2005.34","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.34","url":null,"abstract":"In the design of vehicles of public transport as much as private, it is important to know the real load properties which are put under the vehicle. Although typical load histories are available, these files were obtained in other countries where the conditions of the ways and the operation of the vehicles are very different. In order to be able to obtain histories of loads in the conditions of our country, a system based on a wireless sensing modules network has been developed to measure deformations, temperature and accelerations in multiple points of the vehicle in real time. The obtained data of each sensor is prepared, processed, stored and transmitted in time intervals towards a receiver, which is in charge to send them to a Internet server for its storage, visualization and analysis for any user connected to the network who have accessibility to the collected information and can make the pertinent procedures and actions. In this work the design of the instrumentation system is based on a wireless sensing modules network and it uses the GPRS protocol which is based on GSM cellular technology, permitting us to send all the data received from each wireless module to the server host.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116509073","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
Minimal loss reconfiguration based on simulated annealing meta-heuristic 基于模拟退火元启发式的最小损失重构
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.46
L. García-Santander, F. A. Chacra, H. Opazo, E. Lopez
{"title":"Minimal loss reconfiguration based on simulated annealing meta-heuristic","authors":"L. García-Santander, F. A. Chacra, H. Opazo, E. Lopez","doi":"10.1109/CONIEL.2005.46","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.46","url":null,"abstract":"A method for minimal losses in primary distribution systems by changing topology is presented The loss minimization in distribution systems is based on simulated annealing (SA) and radial power flow. SA's major advantage over other methods is an ability to avoid becoming trapped at local minima. The SA algorithm does not require or deduce derivative information, it merely needs to be supplied with an objective function for each trial solution it generates. Thus, the evaluation of the problem functions is essentially a 'black box' operation as far as the optimization algorithm is concerned, which is the most convenient with large real systems such as electrical networks. The model is useful for planning and operating in primary distribution systems. Through different test network applications, the method was validated and compared to other proposed methods.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125881299","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
Hardware architecture of MAP algorithm for turbo codes implemented in a FPGA 在FPGA上实现turbo码MAP算法的硬件结构
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.44
Roberto Ramírez Marín, A. D. García, L. F. G. Pérez, J. Villarruel
{"title":"Hardware architecture of MAP algorithm for turbo codes implemented in a FPGA","authors":"Roberto Ramírez Marín, A. D. García, L. F. G. Pérez, J. Villarruel","doi":"10.1109/CONIEL.2005.44","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.44","url":null,"abstract":"Turbo codes represent a very powerful channel coding technique for the next generation of mobile communications. The research is focused on the development and implementation of turbo coding-decoding algorithms in high-speed programmable platforms (DSP and FPGA) for a better performance in terms of error correction, power consumption and speed. The MAP (maximum a-posteriori probability) algorithm represents the best performance choice for turbo decoding block. The main objective of implementation is to design structures for turbo decoding near to the theoretical performance using sub-optimal architectures. In this work we present a hardware implementation of the log-domain version of the AMP algorithm (log-AMP). This version of the algorithm gives an excellent approach to the Shannon limits and allows the description of simple blocks based on arithmetic operators, like the MAX* operator.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127498075","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: 7
Analysis of IP network path capacity estimation using a variable packet size method 基于可变数据包大小方法的IP网络容量估计分析
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.20
Marco Turrubiartes, D. T. Román, M. Angulo, D. M. Rodríguez
{"title":"Analysis of IP network path capacity estimation using a variable packet size method","authors":"Marco Turrubiartes, D. T. Román, M. Angulo, D. M. Rodríguez","doi":"10.1109/CONIEL.2005.20","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.20","url":null,"abstract":"Capacity estimation effective in an IP network path is a key enabling technology for proactive and reactive resource management as well as intelligent planning in next generation IP networks. We analyze capacity measurements at different Internet destinations. Particularly, we use the variable packet size (VPS) method to measure the per-hop capacity in some network paths. This method is based on round trip time (RTT) measurements as well as on the Internet control message protocol, ICMP. The RTT delay is approximated by a gamma distribution. We observe how the measurement accuracy of this active probing is affected by factors such as layer 2 device latencies, limited clock resolution at the probing host, or queuing delay. These factors cause non linearity on the RTT curves obtained and, consequently, inaccuracies on the estimation of path capacities. The use of robust regression to improve linear approximation in the VPS method is proposed. As a result, we obtain better qualitative and quantitative results.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123662931","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
A procedure for comparing color 2-dimensional images through their extrusions to the 5-dimensional colorspace 一个程序，比较彩色二维图像通过他们的挤压到5维色彩空间
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.11
A. Aguilera, Santos Gerardo Lázzeri Menéndez, R. Pérez-Aguila
{"title":"A procedure for comparing color 2-dimensional images through their extrusions to the 5-dimensional colorspace","authors":"A. Aguilera, Santos Gerardo Lázzeri Menéndez, R. Pérez-Aguila","doi":"10.1109/CONIEL.2005.11","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.11","url":null,"abstract":"This paper presents a procedure for comparing color 2-dimensional images through their extrusions to the 5-dimensional colorspace. Some key operations to perform our comparison process include the computation of 5D hypervolumes and 5D Boolean operations (intersection and union). Finally, it describes an application of the proposed procedure under the context of the comparison and classification of a volcano's fumaroles.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128954029","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
Focusing and defocusing vision system (SIVEDI) 聚焦和散焦视觉系统(SIVEDI)
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.39
Modesto G. Medina-Meléndrez, José Miguel David Báez-López, J. Rodriguez, L. G. Guerrero-Ojeda
{"title":"Focusing and defocusing vision system (SIVEDI)","authors":"Modesto G. Medina-Meléndrez, José Miguel David Báez-López, J. Rodriguez, L. G. Guerrero-Ojeda","doi":"10.1109/CONIEL.2005.39","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.39","url":null,"abstract":"Machine vision has been made easier by the development of computer systems capable of processing information at high speeds and by inexpensive camera-computer systems. A camera-computer system called SIVEDI was developed based in the shape from focusing technique (SFF) as proposed by Jenn (1997) and a shape from defocusing technique (SFD) developed in this research. The SIVEDI system has as entries the images captured by the camera, the number of steps of the focus mechanism, and the user specifications. The focus mechanism used is the internal one of the camera. To control it an interface computer-camera was designed and developed. An equation is introduced to obtain the measure of relative defocus among many images. A 3D image is produced as the result of the system. SIVEDI consist of a number of modules, each one implementing a step in the system model. The modules are independent of each other and could be easily modified to improve the system. As SIVEDI was developed in the MatLab environment, it can be used in any computer with this software on it. These characteristics offer the user access to the intermediate results and to control the system internal parameters. Results show that the 3D image reconstruction has an acceptable quality.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122190808","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
A bird's eye view of materials and manufacturing processes for photovoltaic cells 鸟瞰光伏电池的材料和制造过程
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.5
Oscar Barragán Cruz, L. Díaz-Olavarrieta
{"title":"A bird's eye view of materials and manufacturing processes for photovoltaic cells","authors":"Oscar Barragán Cruz, L. Díaz-Olavarrieta","doi":"10.1109/CONIEL.2005.5","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.5","url":null,"abstract":"Becquerel discovered the photovoltaic effect in 1839 in electrolytical cells, and in 1887, Day and Adams confirmed the existence of the same effect in solids. One of the first photovoltaic cells was made in 1954, in Bell Laboratories. However, the practical realization of efficient PV cells has remained a difficult challenge 30 years later, in 2004. The need to continue in this pursuit is most pressing as the objectives for renewable energy generation imposed by the Kyoto Protocol, have been established. PV cells have evolved from thick film to thin film single layer cells, and from single film to multilayer cells, or tandem cells. Also there are many materials and manufacturing methods which are here surveyed. We consider inorganic materials, organic and hybrid materials in this brief PV cell fabrication survey.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126546983","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
Over-optimism in software development projects: "the winner's curse" 软件开发项目中的过度乐观:“赢家的诅咒”
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.58
M. Jørgensen, Stein Grimstad
{"title":"Over-optimism in software development projects: \"the winner's curse\"","authors":"M. Jørgensen, Stein Grimstad","doi":"10.1109/CONIEL.2005.58","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.58","url":null,"abstract":"It is well known that software development projects tend to be based on over-optimistic cost estimates. Better knowledge of the sources of this over-optimism is necessary to improve realism in software development project bids and budgets. This paper analyses the effect of \"the winner's curse\". The winner's curse is a result of the selection of software providers among those with the lowest bid, i.e., those with a tendency towards the highest level of overoptimism. The winner's curse has not been extensively analyzed in software cost estimation studies, but is a well known phenomenon in domains such as auctioning. We exemplify the effect of the winner's curse with data from a real software development bidding round and simulate how increase in number of bidders and cost uncertainty impact the expected profit. We argue that the winners' curse is a problem for both clients and providers, and that it may lead to inefficient use of scarce resources. Possible remedies for reduction of negative effects of the winner's curse are discussed.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123772181","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: 50
Output voltage effects in a 2/spl times/2 SMC caused by time index change 2/spl倍/2 SMC输出电压随时间指标变化的影响
15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05) Pub Date : 2005-02-28 DOI: 10.1109/CONIEL.2005.57
Daniel Ortega, Salvador Revelo, José Mariano Fernández Nava, P. B. Sánchez
{"title":"Output voltage effects in a 2/spl times/2 SMC caused by time index change","authors":"Daniel Ortega, Salvador Revelo, José Mariano Fernández Nava, P. B. Sánchez","doi":"10.1109/CONIEL.2005.57","DOIUrl":"https://doi.org/10.1109/CONIEL.2005.57","url":null,"abstract":"A stacked multicell converter (SMC) is an inverter specially adapted to high voltage applications. This inverter is composed of commutation cells ordered in p rows and n stacks, reducing semiconductor commutation stresses and high operation frequencies can be reached. This structure requires 2(pxn) switches to generate an output signal similar to a sinusoidal waveform. However, the switches must be correctly controlled. The most commonly used control technique has been the typical PWM. However, it is possible to generate a control scheme by FPGA technology. So, the control signals are established by the designer. This kind of control has been called patron control signals. In this paper, a complete mathematical analysis of the output voltage behavior for a 2/spl times/2 SMC, when the time index (/spl beta/) changes, is presented. In addition, simulation results are shown to validate the mathematical analysis.","PeriodicalId":367791,"journal":{"name":"15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123518437","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书