This article is devoted to the development of an automated system for the theoretical study of vibro-impact unloading of bulk cargo on vehicles – dumper trucks. The high efficiency of the technological process of unloading bulk cargo by means of the application of vibro-impact loads is determined.A high degree of intensification of the process of unloading of bulk cargo is achieved by using original vibrating and vibro-impact unloaders with a hydroimpulse drive. The system approach to the unloading technological process (unloading device, process, body, bulk cargo) is considered and an automated system of mathematical modeling of the stress-strain state of the body of a dump truck with vibro-impact unloading is developed.The finite element method in the FEM-program was used to determine the main parameters of the stress-strain state of the body of a dump truck under vibro-impact unloading. The results of automated modeling allowed us to evaluate the effectiveness of the impact of shock loads on the body of a dump truck when unloading bulk cargo, as well as the efficiency of the developed designs of vibration-resistant unloading devices with a hydroimpulse drive.
In paper the concept of interaction of cholesteric liquid crystals (CLC) with creatinine and urea to designing the active medium material for optical sensor of biological substances are presented. It is shown that there is a general tendency to reduce the pitch of supramolecular helical structure versus of increasing of concentrations of aqueous solutions for all investigated substances. A decision to designing the scheme of signal converter of optical sensors with frequency selection is proposed. In basis of the proposed decision is impedance converter provided the inductive nature of the impedance circle of load photodiode and therefore suppressing of direct component of the photocurrent.
The paper deals with a problem of insufficient productivity of existing computer means for large image processing, which do not meet modern requirements posed by resource-intensive computing tasks of laser beam profiling. The research concentrated on one of the profiling problems, namely, real-time processing of spot images of the laser beam profile. Development of a theory of parallel-hierarchic transformation allowed to produce models for high-performance parallel-hierarchical processes, as well as algorithms and software for their implementation based on the GPU-oriented architecture using GPGPU technologies. The analyzed performance of suggested computerized tools for processing and classification of laser beam profile images allows to perform real-time processing of dynamic images of various sizes.
The findings have been expounded of the theoretical research aimed at the disclosure of the precise impact of the wear of the mechanical classifier spiral's working parts on the measurement accuracy of the amount of sand in the inter-turn space based on the sand body height. It has been demonstrated that the wear of the spiral's working parts affects both the amount of sand at a certain value of the height of its body and the measurement accuracy of the height itself, with the measurement conducted by the locating method. At a certain constant height of the sand body, less sand is accommodated in the spiral inter-turn space when the operational wear of the working parts is observed, and that “less” can amount to up to 30%. As a result of the working parts' allowable operational wear, the sand body height measurement vertical line coordinates change leading to a relative systemic error, which can reach 20%. That does not make it possible to directly measure the amount of sand in the inter-turn space based on the height of the sand body. The approaches developed make it possible to neutralize the relative sand body height measurement error and to ensure the determination of the amount of sand based on the height of its body with an error not exceeding the process requirements for that parameter's monitoring accuracy.
The article contains basic approaches to develop the self-powered information measuring wireless networks (SPIM-WN) using the distribution of tasks within multicore processors critical applying based on the interaction of movable components – as in the direction of data transmission as wireless transfer of energy coming from polymetric sensors. Base mathematic model of scheduling tasks within multiprocessor systems was modernized to schedule and allocate tasks between cores of one-crystal computer (SoC) to increase energy efficiency SPIM-WN objects.
The structure and circuit of the implemented device is using an environmentally friendly radiation sources and pulse photo stimulus modes with frequencies that correspond frequencies processes in BL to create bio resonance effects to accelerate the procedures. Proposed one of the possible hardware solutions are based on usage of dynamic irradiation modes and automatic continuous optical testing procedures UIAB and PP. The changes of the optical characteristics of BL provides the doctor continuous information on the effectiveness of the procedure on the patient's condition.
KEYWORDS: Electrocardiography, Signal processing, Heart, Data processing, Interference (communication), Diagnostics, Amplifiers, Electrodes, Sensors, Signal detection
Telemedical system design and implementation requires numerous steps. It is necessary to evaluate the operation of algorithms responsible for analysis and detection of life-threatening situations. By performing ECG analysis it is possible to obtain information about the overall patient health condition as well as detailed information about the circulatory system condition. To achieve that goal one must gather, filter and process data. Data was gathered using a purposely built device from a group of four volunteers. Available data set was processed to obtain information about the patients condition. Pan-Tompkins algorithm was used to detect R peaks and calculate heart rhythm. Afterward the rest of parameters were extracted in time domain using windowed peak detection and polynomial estimation. The parameters were calculated as delays between appropriate points in the signal. The method proved to be able to extract parameters in some of the cases, and proved limited effectiveness in situations where physical activity was significant. It was nevertheless possible to eliminate noise from the mains, the trend and higher frequency noise Further improvements need to be introduced to increase the method’s robustness in the presence of significant muscle noise.
The article concerns the research methods of noise reduction occurring in the ECG signals. The method is based on the use of filtration in wavelet transform domain. The study was conducted on two types of signal - received during the rest of the patient and obtained during physical activity. For each of the signals 3 types of filtration were used. The study was designed to determine the effectiveness of various wavelets for de-noising signals obtained in both cases. The results confirm the suitability of the method for improving the quality of the electrocardiogram in case of both types of signals.
The article presents two approaches of determining the ROI area in CT lung screening. First approach is based on a classic method of framing the image in order to determine the ROI by using a MaZda tool. Second approach is based on segmentation of CT images of the lungs and reducing the redundant information from the image. Of the two approaches of an Active Contour, it was decided to choose the Chan-Vese method. In order to determine the effectiveness of the approach, it was performed an analysis of received ROI texture and extraction of textural features. In order to determine the effectiveness of the method, it was performed an analysis of the received ROI textures and extraction of the texture features, by using a Mazda tool. The results were compared and presented in the form of the radar graphs. The second approach proved to be effective and appropriate and consequently it is used for further analysis of CT images, in the computer-aided diagnosis of sarcoidosis.
The paper evaluated the diagnostic value of laser photoplethysmography when examining patients with chronic lower limb ischemia. A statistical analysis of the research results was made, and diagrams of relationship between the degrees of ischemia and blood flow are presented. Development of the device to determine the level of peripheral blood circulation and saturation was presented. Also additional accessories in the form of optical fibers for different applications were suggested.
The article is devoted to the actual problem - the development of new express diagnostic methods, based on which a doctor-otolaryngologist can quickly and efficiently determine a violation of smell. The work is based on the methods of processing and analysis of medical images and signals. We have also identified informative indicators of endoscopic image of the olfactory region of the nasal mucosa of the upper course.
KEYWORDS: Decision support systems, Medical diagnostics, Diagnostics, Medicine, Information technology, Error analysis, Nonlinear filtering, Signal detection, Databases, Morphological analysis, Chemical elements
In the work the formalization of the problem of diagnostic and treatment activities (DTA) steps complex estimation for increasing of their efficiency and minimization of the risk of doctor’s mistakes was completed. The decision support system during conducting of DTA based on formalizations of steps of DTA performing with theirs complex estimation was developed that allows to minimize the risks of doctor’s mistakes, raise validity of decisions.
KEYWORDS: Electrocardiography, Heart, Signal processing, Electronic filtering, Signal detection, Detection and tracking algorithms, Linear filtering, Diagnostics, Lead, Surgery
ECG signal parameters are commonly used indicators of human health condition. In most cases the patient should remain stationary during the examination to decrease the influence of muscle artifacts. During physical activity, the noise level increases significantly. The ECG signals were acquired during controlled physical activity on a stationary bicycle and during rest. Afterwards, the signals were processed using a method based on Pan-Tompkins algorithms to estimate their parameters and to test the method.
The article concerns the development of the methods and systems for non-invasive optical diagnostics of tissues. The
problems of information content tissue backscattering characteristics, planning the optical measurements and the
interpretation of the data of optical sensing of the tissue by fibre-optic devices and systems of multispectral video
reflectometry are considered.
Early detection of malignant transformation is a goal of modern medicine and to this end there is an impressive number of approaches from the scientific field that tries to identify early changes preceding malignant transformation in order to establish a correct diagnosis. This paper aims to combination of polarization and fluorescence techniques for identifying the changes in biotissues of growth and development of experimental solid tumors.
The fiber optic monitoring system was utilized in controlling combustion of pulverized coal with some additives. These additives have a negative influence on combustion stability, which eventually can lead to flameout. To be based on optical signals corresponding to flame radiation intensity contained within a region defined by NA of optical fibers, it is possible to foresee a flameout. It can be done by converting optical signal into electrical form and applying sophisticated methods of signal analysis such as wavelet transform.
Burning pulverized coal in power boilers causes considerable emission of atmospheric pollution. In order to decrease it the combustion process itself has been modified, however at the cost of side effects like: an increased level of unburned coal particles in the ashes. There are tens of burners in a single power boiler and emission level measurements are made in a flue gas duct, so the control based on such averaged and heavily delayed values often results ineffective. The neural controller of the pulverized coal burner attempts to resolve these problems. The clue is the utilization of the fiber-optic system for monitoring of chosen zone of flame developed in Department of Electronics of Technical University of Lublin in subordinate control loop. The article contains a description of controlled system and optical fiber measurement system as well as the idea of new control structure and initial models.
The introduction of low emission techniques of combustion caused side-effects like oxygen lean corrosion. It also enforced more precise management of technological air, better coal milling and application of devices for combustion process monitoring. In the article authors presented their own solution of optical fiber system for combustion quality evaluation, already operating on power boiler type OP-650. Its functionality was described together with selected results of measurements. Directions of further development of the system were also indicated.
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