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Method of model's parameters classification using neural network for meat characterization

Method of model's parameters classification using neural net...

引用

IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： M. Guermazi O. Kanoun N. Derbel Chair for Measurement and Sensor Technology Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GERMANY Intelligent Control design & Optimization of complex Systems (ICOS) University of Sfax Sfax Engineering School Sfax TUNISIA Universite de Sfax Sfax TN Intelligent Control design & Optimization of complex Systems (ICOS) University of Sfax Sfax Engineering School BP W 1173-3038 TUNISIA

ISBN: (纸本)9781467364591

The main objective of this work is to develop the classification application for a new promising method for meat characterization getting information about the state of the vacuum packed meat in supermarket. A supervised training using neural networks and according to the back error propagation method is used. The training ensure a classification with high precision and with ability to answer correctly the inputs then with ability to classify the erroneous inputs which do not exist in the data base, without creating new classes. Method classification consist to classify the model parameters of the physical model of the meat according to a data base including the model's parameters for different beef muscle in different days.

关键词： Biomedical measurement Biology Phase measurement Biomembranes Impedance

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Impedance spectroscopy in solid state electrolyte characterization

Impedance spectroscopy in solid state electrolyte characteri...

引用

9th International Multi-Conference on systems, Signals and Devices, SSD 2012

作者： Wendler, F. Büschel, P. Kanoun, O. Schadewald, J. Bufon, C. C. Bof Schmidt, O.G. Department of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Institute for Integrative Nanosciences IFW Dresden Dresden Germany Department of Material Systems for Nanoelectronics Chemnitz University of Technology Chemnitz Germany

ISBN: (纸本)9781467315906

In this work, a method for the determination of the ion concentration and the diffusion coefficient of lithium ions in a phosphorus oxynitride will be presented. The reproducibility of the parameter extraction and the entire measurement process will be evaluated. The obtained results are in the value range of publications of similar sample properties. © 2012 IEEE.

关键词： Solid state devices

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Investigation of algorithms for the reliable classification of fluorescently labeled plastics

Investigation of algorithms for the reliable classification ...

引用

IEEE Instrumentation and measurement technology Conference

作者： S. Brunner P. Fomin D. Zhelondz Ch. Kargel Institute for Measurement and Automation Division of Sensor Technology and Measurement Systems Bundeswehr University of Munich Neubiberg Germany

The recycling of plastics greatly contributes to the preservation of the natural resource oil and the reduction of the flow of plastic waste to our overflowing landfills. Plastic recycling is highly attractive not only environmentally, but also from an economic point of view. As a result, a rapidly growing interest in plastic recycling technologies exists. An important requirement for high-quality recycling products is the high purity of the recycled material which makes an automated, reliable identification and sorting process of different plastics indispensable. We propose to label the different plastic resins using n fluorescent markers in a way such that unique spectral signatures are generated and thereby avoid the known drawbacks of existing plastic sorting methods. These markers must neither change the properties nor the visual appearance of the plastic parts and are thus to be incorporated with concentrations of only a few ppm on a molecular level during manufacture. The aim of this study is to evaluate the classification performance as a function of the signal-to-noise ratio (SNR) and the computational load of 5 algorithms known to be successfully applied to other applications plus a novel approach when using 4 specific fluorescence markers currently at our disposal. With a simple binary coding scheme 2 4 -1 = 15 different fluorescence emission spectra can be generated which represent 15 different sorts of fluorescently labeled plastics. These investigations shall help optimize the overall measurement system with regard to e.g. the fluorescence excitation source and optical sensors, the spectral shape of the fluorescence emissions and hence the design of more fluorescence markers, etc.

关键词： Plastics Signal to noise ratio Erbium Recycling Error analysis Sorting Encoding

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Demand controlled ventilation strategies for high indoor air quality and low heating energy demand

Demand controlled ventilation strategies for high indoor air...

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IEEE Instrumentation and measurement technology Conference

作者： Yang Wang Yunming Shao Christian Kargel Division of sensor technology and measurement systems Bundeswehr University of Munich Munich Germany

In this study several demand controlled ventilation (DCV) strategies are compared with regard to indoor air quality, thermal comfort, and heating energy demand. In order to appropriately model the office room equipped with a PID controlled floor heating system and 4 commonly used bottom-hinged tilted windows located in our low-energy research house (SmartHOME), the thermal time constants and air exchange rates including the infiltration rate and natural ventilation rate were measured. Simulations were then performed for 2 typical winter days in Munich in the accordingly modeled office room with 2 adults working from 8 a.m. to 6 p.m. The DCV strategies ensure that the CO 2 concentration of the indoor air stays within the preset range. The Pettenkofer limit of 1000 ppm is a hygienically approved limit value for long-term occupied spaces. The results show that the combination of appropriate DCV and floor heating control strategies can greatly reduce the heating energy consumption and at the same time guarantees high indoor air quality and low room temperature variations. It can decrease the total heating energy demand of the office room during working hours by approximately 27% and save 4.4 kWh per typical winter day compared with the usually recommended “brief and intensive airing” method. Moreover, based on our measurements we performed CFD (Computational Fluid Dynamics) simulations in order to determine the temporally resolved 3D distributions of the indoor CO 2 concentration. These results help determine the best location in the room for a single sensor inside the room to representatively measure the CO 2 concentration.

关键词： Ventilation Heating Temperature measurement Floors Atmospheric modeling Exchange rates

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Decentralized multi-target-tracking using a LIDAR sensor network

Decentralized multi-target-tracking using a LIDAR sensor net...

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IEEE Instrumentation and measurement technology Conference

作者： Konrad Wenzl Heinrich Ruser Christian Kargel Division of Sensor Technology and Measurement Systems Bundeswehr University of Munich Neubiberg Germany

A LIDAR (LIght Detection And Ranging) sensor network to track walking persons inside a surveillance area is investigated. A small number of sensor nodes with spatially stationary and partially overlapping narrow LIDAR beams is chosen. As a consequence of this network topology, the area of surveillance is not fully covered with LIDAR beams and thus the accurate tracking of persons walking inside the area of surveillance is challenging, especially in a multi-target situation. To tackle this problem, multiple target tracking based on a sophisticated decentralized track-to-track fusion architecture is developed and evaluated in this paper: dynamic multi-hypothesis tracking (MHT) by independent local trackers is carried out in all sensor nodes; then local track favorites are sent to a fusion center where global track candidates are derived and fed back to the local trackers in order to improve the local tracking. With this architecture a track association success rate of (98.8 ± 0.3)% and a mean square position error of Δp = 6.7 cm were derived from 1000 pairs of random and intersecting trajectories of two walking persons (mean velocity 1.5 m/s). Furthermore, the tracking performance as a function of the target velocity was quantified. The performance of the proposed algorithm was also experimentally evaluated using general-purpose laser scanners.

关键词： Target tracking Trajectory Laser radar measurement by laser beam Laser beams Distance measurement Surveillance

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Impedance measurements of ferrite core displacement sensors for flywheel energy storage systems

Impedance measurements of ferrite core displacement sensors ...

引用

IEEE Instrumentation and measurement technology Conference

作者： Manes Recheis Hannes Wegleiter Bernhard Schweighofer Paul Fulmek Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology Graz Austria Institute of Sensor and Actuator Systems University of Technology Vienna Vienna Austria

For active magnetically suspended rotors in flywheel energy storage systems (FESSs), an inexpensive, robust and reliable contactless displacement measurement is needed. This paper evaluates five different ferrite cores of different size and geometry for a possible use as a displacement sensor. The measurement method and procedure which was built to compare the different cores is described in details. Further the measurement results are discussed.

关键词： Magnetic cores Frequency measurement Voltage measurement Sensitivity Ferrites sensors Current measurement

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Fast and accurate battery model applicable for EV and HEV simulation

Fast and accurate battery model applicable for EV and HEV si...

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IEEE Instrumentation and measurement technology Conference

作者： Bernhard Schweighofer Hannes Wegleiter Manes Recheis Paul Fulmek Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology Graz Austria Institute of Sensor and Actuator Systems University of Technology Vienna Vienna Austria

The need to reduce fuel consumption, minimize emissions, and improve levels of safety, comfort, and reliability is expected to result in a much higher demand for electric power in future cars. In order to develop the needed control algorithms and to optimize the required components some kind of virtual prototype environment is needed. Even so for most components good models already exist, an adequate model for the battery is still missing. However, this is needed since the battery has a large impact on the efficiency of the total system. Therefore this work presents a battery model applicable for EV and HEV simulations.

关键词： Batteries Battery charge measurement Current measurement System-on-a-chip Discharges (electric) Temperature measurement Indexes

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A new approach to improve the reconstruction quality in ultrasound elastography

A new approach to improve the reconstruction quality in ultr...

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IEEE Instrumentation and measurement technology Conference

作者： Andreas Eder Mathias Richter Christian Kargel Division of Sensor Technology and Measurement Systems Bundeswehr University of Munich Munich Germany Division of Mathematics Bundeswehr University of Munich Munich Germany

The development of new medical imaging methods with high sensitivity and specificity for early cancer detection is of paramount interest in medical diagnostics. Since carcinomas are known to often show an increased stiffness compared to the surrounding healthy tissue, the so-called elastography is well-suited for their detection in soft tissue like the female breast. In elastography, the spatial distribution of elastic properties like the E-modulus is displayed as a two-dimensional map. In order to deduce the E-modulus distribution from the tissue's response (i.e. the estimated internal tissue displacements) to an external compression force, the inverse problem governed by the equilibrium equations of linear elastostatics must be solved. In this paper we propose a new approach to reduce the influence of the spatially non-stationary displacement estimation variance on the E-modulus reconstruction, and thus improve the reconstruction quality.

关键词： Ultrasonic imaging Signal to noise ratio Estimation Image reconstruction Vectors Strain Biomedical imaging

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Ultrasonic shear wave elastography for compliance-weighted-imaging

Ultrasonic shear wave elastography for compliance-weighted-i...

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IEEE Instrumentation and measurement technology Conference

作者： V. Rengaraju I. Sack Ch. Kargel Division of Sensor Technology and Measurement Systems Bundeswehr University of Munich Neubiberg Germany Department of Radiology Charité-Universitaetsmedizin Berlin Berlin Germany

Ultrasonic shear wave elastography is a dynamic method that allows in-vivo measurement of the shear elasticity of human tissue. Recovering elasticity maps from time-harmonic wave data remains a major challenge since the calculation of spatially resolved elasticity parameters encounters ill-posed inverse problems due to noise and unknown boundary conditions. Therefore, compliance-weighted-imaging (CWI) is introduced to ultrasonic shear wave elastography for the measurement of elasticity ratios and the visualization of elastic heterogeneities by the amplitude alteration of harmonic shear strain due to wave scattering. In this paper, the results of experiments performed on tissue-mimicking phantoms comprising a planar interface between the hard and soft compartments, and a soft cylindrical inclusion embedded in stiffer background are shown and compared to theoretical models. The proposed ultrasound based CWI method is potentially interesting for the detection of pathological lesions such as medical applications.

关键词： Scattering Ultrasonic imaging Phantoms Strain Vibrations Acoustics Elasticity

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Comparative study of voltage controlled current sources for biompedance measurements

Comparative study of voltage controlled current sources for ...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Dhouha Bouchaala Qinghai Shi Xinyue Chen Olfa Kanoun Nabil Derbel Research unit of Intelligent Control design and Optimization of Complex Systems (ICOS) National School of Engineers of Sfax Sfax Tunisia Chair for Measurement and Sensor Technology (MST) Chemnitz University of Technology Chemnitz Germany

ISBN: (纸本)9781467315906

For bioimpedance measurement, the design of a voltage controlled current source (VCCS) is important to have a good compromise between performance of final results and patient safety. VCCS should have simultaneously large output impedance and wide bandwidth. In this paper, we compare between the Tietze topology, with and without Negative Capacitance Circuit (NCC), and the Improved Howland Current pump ICSA topology. Best results were reached with a Tietze current source with NCC over a wideband frequency range from 10 KHz to 1 MHz. The experiments show that the Tietze VCCS is able to drive loads of 25 Ω to 10 KΩ with current amplitude below 0.5 mA within the accuracy of 0.57% in practice. This fulfills even the requirements for bioimpedance measurements especially at high frequency and high load impedance.

关键词： Current measurement Bioimpedance Impedance Biomedical measurements Voltage measurement Topology Capacitance

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