Tomasz KOSSOWSKIKarolina KOSSOWSKARyszard STASIŃSKI
200-202页
查看更多>>摘要：The paper presents a system for measuring substances in human body by a combined technique: using visible light and near infrared spectroscopy. The approach is non-invasive, attenuation of radiation by tissues is evaluated. Measurement of two chemical compounds levels is described: that of glucose and of elhylic alcohol (ethanol). The presented measuring system is self-calibrating. Due to this, it is possible to measure changes of compound concentrations in ditTerent parts of body, e.g. wrist, arms or legs. The main measurement is done in infrared light (up to 1000 nm), auxiliary ones are performed in visible light (narrow band between 600-680 nm and w ide spectrum from around 420 nm to 780 nm - white light). This allows for measurement not only a compound level, but also characteristic properties of tissues in place where measurement is done. Results of measurements are provided and advantages of multi-wavelength measureinents discussed.
查看更多>>摘要：Automatic text categorization presents many difficulties. Modern algorithms arc getting better in extracting meaningful information from human language. However, they often significantly increase complexity of computations. This increased demand for computational capabilities can be facilitated by the usage of hardware accelerators like general purpose graphic cards. In this paper we present a full processing How for document categorization system. Gram-Schmidt process signatures calculation up to 12 fold decrease in computing time of system components.
查看更多>>摘要：In this paper, we offer and discuss three efficient structural solutions for the hardware-oriented implementation of discrete quaternion Fourier transform basic operations with reduced implementation complexities. The first solution - a scheme for calculating sq product, the second solution -a scheme for calculating q! product, and the third solution - a scheme for calculating sqt product, where s is a so-called i -quaternion, t is an i - quaternion, and q - is an usual quaternion. The direct multiplication of two usual quaternions requires 16 real multiplications (or two-operand multipliers in the case of fully parallel hardware implementation) and 12 real additions (or binary adders). At the saine time, our solutions allow to design the computation units, which consume only 6 multipliers plus 6 two input adders for implementation of , sq or qt basic operations and 9 binary multipliers plus 6 two-input adders and 4 four-input adders for implementation of sqt basic operation.
查看更多>>摘要：In this paper, new schemes for a squarer. multiplier and divider of complex numbers arc proposed. Traditional structural solutions tor each of these operations require the presence of some number of general-purpose binary multipliers. The advantage of our solutions is a removing of multiplications through replacing them by less costly squarers. We use Logan's trick and quarter square technique, which propo.se to replace the calculation of the product of two real numbers by summing the squares. Replacing usual multipliers with digital squares implies the reducing power consumption as well as decreases the comple.xity of the hardware circuit. The squarer requiring less area and power as compared to general-purpose multiplier, it is interesting to assess the use of squarers to implemenlation of complex arithmetic.
查看更多>>摘要：In this correspondence an efficient approach to structure of hardware accelerator tor calculating the quotient of two complex-numbers with reduced number of underlying binary multipliers is presented. The fully parallel implementation of a complex-number division using the conventional approach to structure organization requires 4 multipliers, 3 adders, 2 squarers and 2 divider while the proposed structure requires only 3 multipliers, 6 adders, 2 squarers and 2 divider. Because the hardware complexity of a binary multiplier grows quadratieally with operand size, and the hardware complexity of an binary adder increases linearly with operand size, then the complex-number divider structure containing as little as possible embedded multipliers is preferable.
查看更多>>摘要：In this paper we present an indoor mapping algorithm based on sonar sensor. The overall object detection and mapping experiment is based on small scale local spatial inlbrmation which has been accomplished in a 2D geometrical map. Considering all drawbacks and pluses of ultrasonic sensors, we present an innovative mapping approach, applying the Otsu's method and Hit-or-Miss for sonar-data processing. The collected data are treated as a gray-scale picture. For its binarization, we applied the well-known for vision-based systems threshold calculation. Then also the morphology effect, what rises additionally the mapping accuracy, as is shown at the end of the paper. The robot is based on the education construction set LEGO Mindstorms EV3 intelligent brick on ev3dev -a Debian Linux-based operating system and Python 2.0 have been used tor programming. The results are evaluated and compared with the real space.
查看更多>>摘要：Authors present a real time supervisory system for two cooperating spray booths, which arc elements of the production line. The supervisory system enables a constant observation of such physical parameters like: temperature, pressure, air flow, concentration of styrene etc. The system also warns workers inside spray booths about dangerous events like a critical level of styrene, too low overpressure, the air flow is not high enough, etc. The paper presents results of the hardware and software development.
查看更多>>摘要：We present the principle (Chapter 2), implementation (Chapter 3) and test results (Chapter 4) of direct digital synthesizer (DDS) that most modules, i.e. phase accumulator, ROM memory and optional amplitude control module are implemented in a digital Field Programmable Gate Array (FPGA) device. To obtain smooth shape of analog output signals the FPGA device is followed by a digital-to-analog converter (DAC) and low-pass filter (LPF). The developed DDS allows for generating signals with frequency up to 50 MHz and amplitude up to 1 Vpp. The frequency adjustment re.solution is 1.9 kHz, while the amplitude adjustment step equals 61.04 μV. The use of programmable device allows for changing the size of tuning words to adapt the DDS parameters to requirements of particular application.
Andrzej WOJENSKIK. T. POZNIAKD. MAZONM. CHERNYSHOVA...
223-225页
查看更多>>摘要：Soli X-ray (SXR) plasma measurements are important type of diagnostics espeeially in tokamak faeilities. Main output products are energy and topology spectra distributed in time. In case of Gas Electron Multiplier (GEM) detectors, used as radiation sensors, large number of analog readout channels must be provided. For this purpose Field-Programmable Gate Arrays (FPGAs) are used. Data quality monitoring (DQM) is important topic in case of asynchronous events registered by the measurement unit. Due to numerous FI'GAs used it is necessary to provide advanced trigger synchronization between them. In the paper is proposed an algorithmic approach for the trigger link training and diagnostics. It is a key component in order to provide consistent measurement data for DQM analysis. The contents of the article covers the plasma experiments and related DQM topics. In following chapters e.xplanation of the synchronization problem is described. The proposed algorithm will be used for trigger link synchronization and diagnostics aspects. The simulations are also discussed. Currently, the proposed ideas are at the stage of implementation and tests on real hardware. Simulation were successfully performed. Summary of the work carried out is presented at the end of the paper.
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