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Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
The renewable energy industry has been growing remarkably over the last years and the recent Fukushima nuclear crisis has given a further incentive worldwide. In this context, solar radiation represents one of the most accessible and clean energy resources. For this reason the number and scale of installed photovoltaic (PV) systems has been growing, and consequently the size of the associated investments,...
In this paper, a 12-bit pipelined ADC with power optimized strategy for ultrasonic imaging instruments is newly proposed. The proposed pipelined data converter is attractive due to that the requirements of ultrasonic imaging instruments are successfully matched. Based upon the device parameters of 0.13 µm 1P8M CMOS technology with 3.0 V power supply, all the functions and performance of the proposed...
In this paper, we propose a novel extended-field-ofview (EFOV) imaging algorithm based on the property of motion estimation in quaternion wavelet domain (QWD) for ultrasound images. Firstly, transform the ultrasound video frames into QWD from spatial domain, and the result consists of one magnitude and three phases. Secondly, use two phases to estimate the motion of image sequence derived from the...
Speckle reduction is a tough task for ultrasound images processing resulting to their low resolution and contrast. Quaternion wavelet (QW) is of some superior properties compared to discrete wavelets, such as nearly shift-invariant wavelet coefficients and phase based texture presentation. So we aim to exploit the excellent performances of speckle reduction in quaternion wavelet domain (QWD) based...
In this paper, sensor characterization is done based on gene expression programming evolutionary algorithms. The process presented is suited for situations where there is no knowledge of the sensor equivalent circuit and a set of impedance responses can be obtained for different measurand values. These responses are used by the algorithm to determine the best suited equivalent circuit and choose the...
Monolithic fabrication and advancements in MEMS and nanotechnology have made biomedical implants more popular for monitoring and other applications in humans and animals. One of the primary challenges faced in employing implants is providing a stable battery-less power supply. Inductive coupling is a commonly used means of transferring energy to implanted devices requiring power in milliwatt or microwatt...
This paper introduces a method of forming up the cross sectional velocity profile of horizontal two-phase flow by adopting a dual-plane Electrical Resistance Tomography (ERT) system and cross correlation method. The preliminary results are presented with numerical simulations, where a pixel-like mesh is used to segment the cross section of the measuring field. The relationship between the peripheral...
Bi-dimensional empirical mode decomposition (BEMD) has been one of the core activities in image processing. Unfortunately, this promising technique is sensitive to boundary effect. Here, a new technique based on multivariate grey model termed as GM(1, 3) is developed for boundary extension in BEMD. More specifically, pixel values and coordinates of the image are regarded as characteristic data series...
In this work a new high-resolution offset cancellation technique based on bulk-voltage trimming is presented, which can be applied to Flash analog-to-digital converters (ADCs). The offset calibration is achieved by digitally adjusting the bulk voltages of the differential pairs of the preamplifier consisting of NMOS transistors in a triple well technology. Furthermore this technique minimizes the...
A new meaning to “Signature Analysis” as it relates to Analog to Digital Converters (ADCs) and releasing products to production is presented. This paper will expand the reader's skill set with advanced techniques to analyze data from ADCs that justifies device performance. The technique will also be a valuable tool to develop intellectual property that enhances an ADC product line performance. The...
In order to make an ergonomic analysis of laborer working conditions, we need to measure the different joint angles along the daily work. These angles will be used to define the requirements of each workstation. This information, together with the medical examination of each worker, is then used to determine whether a worker can develop a task, or if the task may have caused an occupational disease...
In this paper, the performance of a cough sound discriminator capable of distinguishing between dry and wet cough sounds is evaluated in reverberant environments. In addition, microphone array is used in order to improve the performance of the cough sound discriminator. Cough sounds were acquired by a single microphone in a reverberant room at various microphone-to-speaker distances. Results showed...
We present a waist-worn personal navigation system based on inertial measurement units. The device makes use of the human bipedal pattern to reduce position error. We describe improved algorithms, based on detailed description of the heel strike biomechanics and its translation to accelerations of the body waits, to estimate the periods of zero velocity, the step length, and the heading estimation...
Development of wearable sensor node for continuous monitoring of respiratory sounds presents several research challenges. In this article we analysed power consumption of such node in scenarios of on-node signal processing, and compressive sampling with low frequency data streaming. Onset of requirements defined by each scenario, we reviewed state of the art of recent commercial off-the-shelf (COTS)...
The Coupled Dark State Magnetometer (CDSM) is an optically-pumped absolute scalar magnetometer which is based on two-photon spectroscopy of free alkali atoms. Several magnetic field dependent resonances occur in the presence of an external magnetic field, reaching their maximal strengths at different angles between the magnetic field direction and the reference axis of the sensor defined by the optical...
The paper compares the main methods used for measuring of the piezoelectric material constants. It outlines the principle of three measuring methods most commonly used today, i.e. the frequency method, the laser interferometry method and the quasi-static method. These methods have been practically applied to piezoelectric ceramic samples. The paper describes the production of the piezoelectric ceramic...
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