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IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)最新文献

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Calculation of complex models for accurate representation of power station equipment: Novel tool for TRV application 电站设备精确表示的复杂模型计算:TRV应用的新工具
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313767
A. Marmolejo, P. Fraioli, M. Palazzo
{"title":"Calculation of complex models for accurate representation of power station equipment: Novel tool for TRV application","authors":"A. Marmolejo, P. Fraioli, M. Palazzo","doi":"10.1109/EUROCON.2015.7313767","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313767","url":null,"abstract":"Electromagnetic transient simulations normally demand the use of complex circuits which allow a more realistic representation of power station equipment such as synchronous generators and step-up transformers. Using complex circuits, however, requires higher modeling effort. Finding the parameters of complex models often falls beyond the capabilities of analytical methods and therefore more sophisticated techniques are required. The present paper is specifically concerned with a novel tool that uses a genetic algorithm for the calculation of the parameters of complex equivalent circuits in order to represent the specific transient recovery voltage required for a particular generator circuit-breaker application. The parameters of complex equivalent circuits can be chosen to accurately represent the behavior of actual machines. These circuits can be then used to calculate the transient recovery voltages modified by the capacitors of a generator circuit-breaker.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114269740","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
Energy systems models for efficiency towards Smart Cities 实现智慧城市能效的能源系统模型
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313682
J. Galvão, L. Moreira, R. Ascenso, S. Leitão
{"title":"Energy systems models for efficiency towards Smart Cities","authors":"J. Galvão, L. Moreira, R. Ascenso, S. Leitão","doi":"10.1109/EUROCON.2015.7313682","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313682","url":null,"abstract":"The way of energy use in the European Union (EU) needs to be improved by continuous promotion of sustainability and an efficient manner to ensure citizens' quality of life. This work presents two new energy models: i) retrofit of the present energy system in a public library building; ii) improving energy efficiency in public lighting using new technological solution Light Emission Diode (LED), new methods of control and management while leveraging the use of renewable energy as power supply. Both can act as a vehicle to disseminate concepts of Smart City (SC) and Internet of Things (IoT), also, as the development of energy production based on renewable energies: biomass and sunlight. With these two proposals it is intended to improve energy efficiency behaviours reducing energy waste, making use of the latest techniques and equipment, which promote more efficient management. This will lead to an effective reduction of energy consumption associated with public lighting while maintaining recommended levels of luminance in different situations. Finally this research is also to complete, a long-term goal of the EU, which is to develop a society that better uses their energy systems and, in Portugal, increase the use of available renewable energy sources.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126807748","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: 11
Design considerations and experimental results on composite right-/left-handed based distributed oscillator 复合左/右分布振荡器的设计考虑及实验结果
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313680
S. Simion, G. Bartolucci
{"title":"Design considerations and experimental results on composite right-/left-handed based distributed oscillator","authors":"S. Simion, G. Bartolucci","doi":"10.1109/EUROCON.2015.7313680","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313680","url":null,"abstract":"An oscillator based on distributed amplifier realized by using CRLH (Composite Right-/Left-Handed) unit cells is designed and experimentally validated. The positive feedback consists of a transmission line which connects the input port and drain idle port of the amplifier. The remaining two ports of the distributed amplifier are the oscillator output ports. For this oscillator topology, the transistors give the same contribution to the output power. The measured powers at the two output ports are equal to 12.6 dBm and 10.4 dBm. The experimental frequency of oscillation is 2.77 GHz, the difference compared to the simulated value being less than 1%.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123930652","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
Max-log-MAP decoding with reduced memory complexity 减少内存复杂度的Max-log-MAP解码
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313790
Dejan Spasov, M. Gusev, S. Ristov
{"title":"Max-log-MAP decoding with reduced memory complexity","authors":"Dejan Spasov, M. Gusev, S. Ristov","doi":"10.1109/EUROCON.2015.7313790","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313790","url":null,"abstract":"Given an M-state (recursive) convolutional encoder and information sequence of length n, the space complexity of unoptimized Bahl-Cocke-Jelinek-Raviv (BCJR) decoder is considered to be O(nm). However, if BCJR's forward alpha coefficients are continuously recomputed instead of stored in memory, it can be shown that the space complexity will drop to O(m). In this paper we start from these observations and present a technique for memory reduction in the Max-Log-MAP algorithm. We test our design on a rate-1/2 1025-bit-long Turbo Code and show considerable memory saving.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116757564","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
Enhanced audio transmission over ADSL using prioritised DMT modulation and retransmissions 通过ADSL使用优先DMT调制和重传增强音频传输
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313673
T. P. Fowdur, Prateema Ragpot, K. Soyjaudah
{"title":"Enhanced audio transmission over ADSL using prioritised DMT modulation and retransmissions","authors":"T. P. Fowdur, Prateema Ragpot, K. Soyjaudah","doi":"10.1109/EUROCON.2015.7313673","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313673","url":null,"abstract":"Asymmetric Digital Subscriber Line (ADSL) is a broadband communications technology which is widely used for transmitting high bandwidth data such as audio and video over the internet. However, ensuring a good Quality of Service (QoS) in the transmission of such data over ADSL is challenging due to channel impairments such as noise and crosstalk. Moreover, given that the total monthly fixed data traffic is increasing at a phenomenal rate, (QoS) management is becoming a crucial issue. This paper proposes an enhanced transmission scheme for audio over ADSL. The proposed scheme exploits the unequal importance of the subbands generated by an MP1 codec to offer varying protection to them during ADSL transmission. This is achieved by multiplexing the bit streams from the subbands before Discrete Multi-tone Modulation (DMT) so that bit streams corresponding to more important subbands are offered higher protection than the least important ones. Additionally, a sophisticated retransmission protocol is proposed which allows frames from more important subbands to benefit from a greater number of retransmissions than least important ones. The retransmission protocol uses eight different Negative Acknowledgement (NACK) packet types which allow adaptive multiplexing of frames at the transmitter. The proposed Unequal Error Protection (UEP) scheme provides an average gain of over 28 dB in Segmented Signal to Noise Ratio (SSNR) over a conventional Equal Error Protection (EEP) one but incurs a negligible loss in throughput.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126623519","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
Non-negative matrix factorization using posrank-based approximation decompositions 基于posrank近似分解的非负矩阵分解
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313764
A. Almeida
{"title":"Non-negative matrix factorization using posrank-based approximation decompositions","authors":"A. Almeida","doi":"10.1109/EUROCON.2015.7313764","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313764","url":null,"abstract":"The present work addresses a particular issue related to the nonnegative factorisation of a matrix (NMF). When NMF is formulated as a nonlinear programming optimisation problem some algebraic properties concerning the dimensionality of the factorisation arise as especially important for the numerical resolution. Its importance comes in the form of a guarantee to obtain good quality approximations to the solutions of signal processing image problems. The focus of this work lies in the importance of the rank of the factor matrices, especially in the so-called posrank of the factorisation. We report computational tests that favor the conclusion that the value of the posrank has an important impact on the quality of the images recovered from the decomposition.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123766033","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
Ultrasound B-MODE image processing as a MATLAB software tool and as an experimental solution on ARM platform 超声B-MODE图像处理作为MATLAB软件工具，作为ARM平台上的实验解决方案
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313801
Jiri Blahuta, Tomás Soukup, P. Čermák
{"title":"Ultrasound B-MODE image processing as a MATLAB software tool and as an experimental solution on ARM platform","authors":"Jiri Blahuta, Tomás Soukup, P. Čermák","doi":"10.1109/EUROCON.2015.7313801","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313801","url":null,"abstract":"The paper is focused on image processing of B-images from diagnostic ultrasound, their processing and analysis with own developed algorithm based on binary thresholding which is useful for images in grayscale such as B-images. The presented algorithm has been created as MATLAB-based application and verified its function for 2 different structures displayed in midbrain - substantia nigra and raphe nucleus. The processing and analysis is based on measuring of their echogenicity level from the principle of B-MODE. The results also was verified and rated by an experienced sonographer. The second part is focused on implementation of the algorithm on embedded system ARM Cortex-M4 which allows to create an independent hardware computing unit connectable to an ultrasound machine. Sonographers could evaluate pathological issues directly with no loading images to a computer. We selected ARM platform due to its performance, low consumption and hardware scalability. Communication from MATLAB is realized via serial port RS232 and loading the source code into microcontroller of ARM CPU. All reached results have been investigated and verified by the experienced sonographer with statistical analysis of reliability and reproducibility (correlation, kappa and ROC). This analysis verified successful reproducibility of the algorithm in clinical practice to early diagnostic.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123555519","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 new self-organizing map topology for real-time spectrum sensing and fast convergence 一种新的自组织映射拓扑，用于实时频谱感知和快速收敛
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313761
Liudas Stasionis, A. Serackis
{"title":"A new self-organizing map topology for real-time spectrum sensing and fast convergence","authors":"Liudas Stasionis, A. Serackis","doi":"10.1109/EUROCON.2015.7313761","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313761","url":null,"abstract":"The paper presents a new modification of a self-organizing map topology to increase the speed of feature map convergence. The modification proposed in this paper is useful for real time spectrum sensing applications in which the SOM is used for classification tasks. Three alternative SOM topologies were tested and compared with the proposed topology modification. The number of epochs needed to ensure the convergence of feature maps was reduced by about 20 times using the proposed topology modification. An experimental investigation was performed using an SOM-based spectrum sensor on two radio bands with different spectral characteristics. The modified SOM topology showed not only a faster convergence, but also a better emission detection performance comparing to hexagonal, grid and rhombus topologies.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124667508","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 novel UML profile for representation of a relational database schema 用于表示关系数据库模式的新颖UML概要文件
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313672
Igor Tomic, D. Brdjanin, S. Maric
{"title":"A novel UML profile for representation of a relational database schema","authors":"Igor Tomic, D. Brdjanin, S. Maric","doi":"10.1109/EUROCON.2015.7313672","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313672","url":null,"abstract":"In this paper we propose a novel specification of a UML profile for the representation of a relational database schema. The profile specification is based on the UML class diagram extension that exploits operation signature for the representation of specific relational database concepts, such as single and multi-column primary and foreign keys, indices, etc. The advantages of the proposed approach are: reduction of additional properties in the stereotypes representing the keys, better visualization of database constraints and more efficient forward database engineering. We also present the corresponding profile implementation as an open source development platform plug-in, which allows manual modeling, as well as the automatic (software/program) generation of a relational database scheme in accordance with the defined profile. The application of the implemented profile is illustrated by an example of visualization of a particular relational database schema.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131204786","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
Application of MIMO DF equalization to high-speed off-chip communication MIMO DF均衡在高速片外通信中的应用
IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON) Pub Date : 2015-11-02 DOI: 10.1109/EUROCON.2015.7313730
L. Jacobs, M. Guenach, M. Moeneclaey
{"title":"Application of MIMO DF equalization to high-speed off-chip communication","authors":"L. Jacobs, M. Guenach, M. Moeneclaey","doi":"10.1109/EUROCON.2015.7313730","DOIUrl":"https://doi.org/10.1109/EUROCON.2015.7313730","url":null,"abstract":"In this contribution, we present a multiple-input multiple-output (MIMO) equalizer with decision feedback (DF) for high-speed chip-to-chip communication. We derive an elegant closed-form expression for the minimum mean square error (MMSE) equalization filters and show that the application of MIMO DF equalization (DFE) allows to significantly improve the reliability of high-speed communication over low-cost electrical interconnects.","PeriodicalId":133824,"journal":{"name":"IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133981188","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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