2015 Open Conference of Electrical, Electronic and Information Sciences (eStream)最新文献_第2页

Business process event log use for activity sequence analysis 用于活动序列分析的业务流程事件日志

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119500

Titas Savickas, O. Vasilecas

引用次数: 3

CMOS technology based LC VCO review 基于CMOS技术的LC压控振荡器综述

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119493

V. Macaitis, R. Navickas

引用次数: 13

The research of stiffness characteristics of active elements of harvester 收割机主动元件刚度特性研究

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119487

Artur Kazickij, V. Bučinskas, E. Šutinys

{"title":"The research of stiffness characteristics of active elements of harvester","authors":"Artur Kazickij, V. Bučinskas, E. Šutinys","doi":"10.1109/ESTREAM.2015.7119487","DOIUrl":"https://doi.org/10.1109/ESTREAM.2015.7119487","url":null,"abstract":"This paper is dedicated to one part of research of human mechanical energy harvester. Harvesters produce electrical energy from human's kinetic energy. Harvesting energy from human body is particularly useful for military portable electronic equipment, life supporting implantable medical devices (IMD) and consumer electronic devices. As a basis of energy transformation piezoelectric crystal was used. Human body creates vibrations of very low frequency, but piezoelectric crystal has natural frequency of hundreds of hertz. This research is intended to adjust mechanical parameters of this harvester and define additional mechanical system parameters which will allow whole harvester became dynamically sensitive to human body vibrations. In this paper there were defined stiffness of real test sample of piezoelectric harvester part and defined characteristics of reduced moments of inertia for dynamical and further mathematical models. After obtaining these values, verification of experimental and theoretical results are presented. Experimental research was performed on specially created test rig using prepared test piece. Theoretical calculations were performed using Solidworks simulation software. Finally, results were compared and conclusions are drawn.","PeriodicalId":241440,"journal":{"name":"2015 Open Conference of Electrical, Electronic and Information Sciences (eStream)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123368830","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

Implementing a rule-based dynamic business process modelling and simulation 实现基于规则的动态业务流程建模和仿真

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119486

D. Kalibatienė, O. Vasilecas, Toma Rusinaite

引用次数: 10

Sectional meander microstrip delay line: interconnection modelling 截面弯曲微带延迟线:互连建模

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119484

A. Gurskas, A. Krukonis, V. Urbanavičius

{"title":"Sectional meander microstrip delay line: interconnection modelling","authors":"A. Gurskas, A. Krukonis, V. Urbanavičius","doi":"10.1109/ESTREAM.2015.7119484","DOIUrl":"https://doi.org/10.1109/ESTREAM.2015.7119484","url":null,"abstract":"Model of sectional meander microstrip delay line (MMDL), which takes into account the mismatch and heterogeneity of sections, is created. Multiple sections are widely used in the planar delay lines (DL) to optimize filling the substrate area by signal conductor; for example, to achieve desired large delay, several substrates with multiple sections may be assembled and connected. Several models of the sectional DL are discussed in this paper. According to the “simplified” model a section of the transmission line (TL) is connected to the load of different impedances. This section corresponds to the single MMDL meander segment. Such model does not take into account scattering of electric field at the DL edges, and frequency dependency of characteristic impedance and phase delay of TL section. The “intermediate” models in reality are only modified the “simplified” model. To evaluate electric field scattering at the MMDL ends lumped capacitors are used in these models. Nevertheless, the frequency dependence of impedance and phase delay remains unevaluated in the “intermediate” model. The “final” model is based on hybrid analysis technique - synergy of method of moments and scattering matrixes. This model takes into account both the electric field scattering and inconsistency of sections.","PeriodicalId":241440,"journal":{"name":"2015 Open Conference of Electrical, Electronic and Information Sciences (eStream)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126076514","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

Design of a time-gain-compensation amplifier for ultrasonic echo signal processing 用于超声回波信号处理的时间增益补偿放大器的设计

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119501

A. Vasjanov, V. Barzdenas

{"title":"Design of a time-gain-compensation amplifier for ultrasonic echo signal processing","authors":"A. Vasjanov, V. Barzdenas","doi":"10.1109/ESTREAM.2015.7119501","DOIUrl":"https://doi.org/10.1109/ESTREAM.2015.7119501","url":null,"abstract":"This article presents a design concept of a time-gain-compensation (TGC) amplifier integrated circuit (IC) for ultrasonic echo signal processing. The TGC chain contains pre-amplification, attenuation, filtering and comparison circuit blocks. An on-chip oscillator, bias circuit and digital control core are also included. The presented TGC IC concept blocks are designed and modeled using Cadence's IC design tools using a 250 nm CMOS process. The operational amplifier implemented in the TGC IC has a gain of 35 dB with a -3 dB bandwidth of 750 kHz, which corresponds to ultrasonic signal frequency range. The second order active band pass filter is of a Sallen-Key topology with a 274 MHz center frequency and a filter quality factor of Q = 1.018. A ring oscillator with external tuning capability is modeled at 448 kHz and has a 0.09 % frequency deviation. The ultrasonic echo processing chain has a digital output where the length of the pulse corresponds to the received signal strength. This makes the presented TGC IC concept suitable for both simple and complex ultrasonic, medical, industrial or research equipment.","PeriodicalId":241440,"journal":{"name":"2015 Open Conference of Electrical, Electronic and Information Sciences (eStream)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124688925","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

Synthesis of control systems of multiply connected chemical-technological objects with delay 多连接时滞化工对象控制系统的综合

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119488

I. F. Kuzmicki, A. V. Lapeto

引用次数: 1

Revised 2D fast fourier transform 修正的二维快速傅里叶变换

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119497

R. Pupeikis

引用次数: 2

Dynamic business process model implementation solutions 动态业务流程模型实现解决方案

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119499

Toma Rusinaite, O. Vasilecas

引用次数: 1

Game theory for future IEEE 802.11 spectrum sharing 未来IEEE 802.11频谱共享的博弈论

2015 Open Conference of Electrical, Electronic and Information Sciences (eStream) Pub Date : 2015-04-21 DOI: 10.1109/ESTREAM.2015.7119481

Tomas Cuzanauskas, A. Anskaitis

{"title":"Game theory for future IEEE 802.11 spectrum sharing","authors":"Tomas Cuzanauskas, A. Anskaitis","doi":"10.1109/ESTREAM.2015.7119481","DOIUrl":"https://doi.org/10.1109/ESTREAM.2015.7119481","url":null,"abstract":"This article describes one of many possible paradigms for future wireless applications. The spectrum in which Wi-Fi operates these days is overcrowded and currently applied rules for Wi-Fi operation are not up-to-date. By adopting a new set of rules for Wi-Fi, it is possible to eliminate some of the currently defined constraints such as Equivalent (Effective) Isotropic Radiated Power limitation (EIRP) or widely used Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) channel access mechanism. As it is known, behavior of Wi-Fi device might affect the nearby operating neighboring device, because the channels are shared between multiple sets of wireless devices, degrading the total network performance as well as creating stability issues. In order to bypass both of these limitations and lighten the constraints for Wi-Fi devices, there is a need for a new way of defined interactions between wireless devices. Game theory can be described as a set of tools to model Wi-Fi devices interactions in highly dynamic environment. By applying game theory it is possible to evaluate various interactions between neighboring devices and to create a new set of rules on how they operate. This methodology would let us solve resource allocation problems in unlicensed frequency band and improve spectrum sharing between devices. Within this article we proposed game theory model that brings clear benefits beyond the confines of solely Wi-Fi technology. By employing game theory models we can control the spectrum sharing interactions between devices as well as other channel usage interactions between Wi-Fi devices, thus enabling more efficient usage of currently limited unlicensed band spectrum.","PeriodicalId":241440,"journal":{"name":"2015 Open Conference of Electrical, Electronic and Information Sciences (eStream)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126887155","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