2013 IEEE 8th International Symposium on Intelligent Signal Processing最新文献

Chirp-based piezo-impedance measurement 基于啁啾的压电阻抗测量

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657487

T. Saar, M. Reidla, O. Martens, R. Land, M. Min, H. Herranen

{"title":"Chirp-based piezo-impedance measurement","authors":"T. Saar, M. Reidla, O. Martens, R. Land, M. Min, H. Herranen","doi":"10.1109/WISP.2013.6657487","DOIUrl":"https://doi.org/10.1109/WISP.2013.6657487","url":null,"abstract":"Electro-mechanical impedance and its variations, measured with piezo-sensors as a function of frequency, indicate the conditions and changes in the structures of materials and can be used for structural health monitoring. Available impedance measurement solutions have very limited features and performance or are bulky and costly and not supporting real-time monitoring of the dynamics of impedance spectra. Efficient (by various aspects) solutions using the chirp excitation signal have been described and investigated. Sine-wave chirp excitation signal together with corresponding sine and cosine reference waves have been used for calculation of the correlation in the relatively small sliding window. It enables to find real and imaginary parts of the transfer coefficient of the electrical network, including impedance of the piezo-sensor under test. From the hardware viewpoint two solutions have been proposed and tested ' one with using of the commercial connected-by-USB to PC data acquisition unit and the second with the DSP (TMS320F28335) based solution. For both cases the special analogue interface has been developed for driving the sensor-circuit with up to 60 V peak-to-peak voltage. The proposed solutions have been tested successfully. Various application fields of the proposed impedance measurement solutions are considered ' e.g. integrity-check of the piezo-sensor itself and the delamination test of the composite material.","PeriodicalId":350883,"journal":{"name":"2013 IEEE 8th International Symposium on Intelligent Signal Processing","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129731941","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

Comparison and adaptation of step length and gait speed estimators from single belt worn accelerometer positioned on lateral side of the body 放置在身体侧面的单带式加速度计的步长和步速估计器的比较和适应

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657475

Taufique Sayeed, A. Samà, Andreu Català, J. Cabestany

{"title":"Comparison and adaptation of step length and gait speed estimators from single belt worn accelerometer positioned on lateral side of the body","authors":"Taufique Sayeed, A. Samà, Andreu Català, J. Cabestany","doi":"10.1109/WISP.2013.6657475","DOIUrl":"https://doi.org/10.1109/WISP.2013.6657475","url":null,"abstract":"Parkinson's Disease (PD) is a neurodegenerative disease that predominantly alter patients' motor performance and compromises the speed, the automaticity and fluidity of natural movements. The patients fluctuate between periods in which they can move almost normally for some hours (ON state) and periods with motor disorders (OFF state). Gait properties are affected by the motor state of a patient: reduced stride length, reduced gait speed, increased stride width etc. The ability to assess the motor states (ON/OFF) on a continuous basis for long time without disturbing the patients' daily life activities is an important component of PD management. An accurate report of motor states could allow clinics to adjust the medication regimen to avoid OFF periods. The real-time monitoring will also allow an online treatment by combining, for instance, with automatic drug-administration pump doses. Many studies have attempted to extract gait properties through a belt-worn single tri-axial accelerometer. In this paper, a user friendly position is proposed to place the accelerometer and six step length estimators are compared considering the proposed sensor placement in a preliminary database of healthy volunteers. Adaptation methods to some of these estimators are also proposed and compared. The comparison shows that the adapted estimators improve the performance and reduce errors in respect of the original methods applied in the new sensor location.","PeriodicalId":350883,"journal":{"name":"2013 IEEE 8th International Symposium on Intelligent Signal Processing","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128014315","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: 20

HVAC simulation model for advanced diagnostics 用于高级诊断的暖通空调仿真模型

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657489

Ondrej Holub, K. Macek

引用次数: 12

On the equivalence of two symmetric differences 关于两个对称差分的等价性

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657478

J. Dombi

引用次数: 3

3D measurement of a moving object using 3D accelerometer attached to moving camera 使用附在移动相机上的3D加速度计对移动物体进行3D测量

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657485

T. Akamatsu, F. Dong, K. Hirota

引用次数: 0

Tissue temperature estimation with pulse-echo in blood flow presence 血流存在时用脉冲回波估计组织温度

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657477

M. Graca Ruano, H. Simoes Duarte, C. Teixeira

{"title":"Tissue temperature estimation with pulse-echo in blood flow presence","authors":"M. Graca Ruano, H. Simoes Duarte, C. Teixeira","doi":"10.1109/WISP.2013.6657477","DOIUrl":"https://doi.org/10.1109/WISP.2013.6657477","url":null,"abstract":"Aiming at time-spatial characterization of tissue temperature when ultrasound is applied for thermal therapeutic proposes two experiments were developed considering gel-based phantoms, one of them including an artificial blood vessel. The blood vessel was mimicking blood flow in a common carotid artery. For each experiment phantoms were heated by a therapeutic ultrasound (TU) device emitting different intensities (0.5, 1, 1.5, 1.8 W/cm2). Temperature was monitored by thermocouples and estimated through imaging ultrasound transducer's signals within specific special points inside the phantom. The temperature estimation procedure was based on temporal echo-shifts (TES), computed based on echo-shifts collected through image ultrasound (IU) transducer. Results show that TES is a reliable non-invasive method of temperature estimation, regardless the TU intensities applied. Presence of a pulsatile blood flow vessel in the focal point of TU transducer reduces thermal variation in more than 50%, also affecting the temperature variation in the surrounding area. In other words, vascularized tissues require longer ultrasound thermal therapeutic sessions or higher TU intensities and inclusion of IU in the therapeutic procedure enables non-invasive monitoring of temperature.","PeriodicalId":350883,"journal":{"name":"2013 IEEE 8th International Symposium on Intelligent Signal Processing","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127625531","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

DSP based Fuzzy controller applied to a DC-DC Boost converter 基于DSP的模糊控制器应用于DC-DC升压变换器

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657482

João T. de Carvalho Neto, A. Salazar, Fábio M. U. de Araújo, Anderson L. De O Cavalcanti

引用次数: 7

Fusion algorithm based on fuzzy neural networks 基于模糊神经网络的融合算法

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657480

Alexey Natekin, A. Knoll

引用次数: 0

Efficient TDMA scheduling algorithms for sensor networks containing multiple rings 多环传感器网络的高效TDMA调度算法

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657495

Á. Orosz, G. Róth, G. Simon

引用次数: 1

Agile online-trained neural network models by using Robust Fixed Point Transformations 基于鲁棒不动点变换的敏捷在线训练神经网络模型

2013 IEEE 8th International Symposium on Intelligent Signal Processing Pub Date : 2013-11-07 DOI: 10.1109/WISP.2013.6657481

T. A. Várkonyi, V. Piuri, J. Tar, A. Várkonyi-Kóczy, I. Rudas

{"title":"Agile online-trained neural network models by using Robust Fixed Point Transformations","authors":"T. A. Várkonyi, V. Piuri, J. Tar, A. Várkonyi-Kóczy, I. Rudas","doi":"10.1109/WISP.2013.6657481","DOIUrl":"https://doi.org/10.1109/WISP.2013.6657481","url":null,"abstract":"Nowadays, in the field of information processing, neural networks (NNs) are very used, because they can learn adaptively how to behave in a desired way. In the field of adaptive control, NNs are the most beneficial when the system to be controlled is not known in advance, because the system can be modeled by NNs to predict its behavior. In this case, it is very important how accurate the estimation of the NN is, since if the approximation is too rough then extra calculations are needed to get better results. One of the possibilities for improving the NN model is on-line learning during the control process, but this option requires high computational time. Another possibility is the application of Robust Fixed Point Transformations (RFPT), since though, it can only guarantee local stability, RFPT has been developed to reduce the inaccuracy caused by modeling errors and it does not need high computational time. In this paper, a new combination of the two methods the on-line trained neural networks and RFPT is proposed to decrease the computational burden caused by the on-line adaptation and keep the results close to optimum.","PeriodicalId":350883,"journal":{"name":"2013 IEEE 8th International Symposium on Intelligent Signal Processing","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127160078","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