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Journal articles on the topic 'LabVIEW R'
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Sun, Jun, and Hai Zhe Liu. "Two Balanced Car LQR Algorithm Achieved Based on LabVIEW." Applied Mechanics and Materials 127 (October 2011): 592–97. http://dx.doi.org/10.4028/www.scientific.net/amm.127.592.
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Constructed of high-order, multi-variable mathematical model of two balanced car, and using LQR algorithm relies on the powerful LabVIEW Control Toolkit, through continuously adjust the weighting matrix Q and R, designed the optimal secondary controller,it is better to balance the system robust stability and reaction fast, and by drawing out of the system output response curve, verify the correctness and the effectiveness of the controller.
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Wang, Yong Ning. "LabVIEW-Based Design of Virtual Instruments and R&G of Virtual Experimental System." Applied Mechanics and Materials 513-517 (February 2014): 1756–59. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.1756.
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With the popularization of network technology, the computer technology is developing rapidly coupled with the emergence of virtual instrument technology. In this context, virtual experiment, an effective complement to the development of the traditional experimental method, has very broad spectrum of application in the field of education, measurement, and even other research areas. Thus, virtual experiment has become an important future development of experimental teaching. Based on analysis of the history and current status of the existing virtual laboratory at home and abroad, as well as the technologies used to accomplish a virtual experiment, this thesis makes a comprehensive study to analyze the construction of the virtual experiment system, including the basic theory of its establishment, the network environment, application classification, the specific tectonic model and technical methods and its development and applications.
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Ali, S., S. Mahmood, I. Orban, et al. "Photo-recombination studies at R-EBIT with a Labview control and data acquisition system." Journal of Instrumentation 6, no. 01 (2011): C01016. http://dx.doi.org/10.1088/1748-0221/6/01/c01016.
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Dezső, Dávid, Gyula Győri, and Géza Husi. "Development of ECG measurement and processing system in LabVIEW environment." International Review of Applied Sciences and Engineering 12, no. 1 (2021): 76–85. http://dx.doi.org/10.1556/1848.2020.00152.
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Abstract In this project an ECG measurement and wave identification system was made. The measuring system hardware is based on a Texas Instruments ADS1298ECG amplifier and analog-to-digital converter board. The measurement and processing software was created in LabVIEW environment using the built-in functions of the Biomedical toolkit. Initially, the theory behind heartbeat and its effect on the skin surface potential are presented. Then the measurement techniques of these are described. The research group provide information on the mathematical background of how the ECG curve is processed and the waves are identified. The HRV analysis, the statistical analysis of identified R waves are described. Subsequently, publications dealing with electrocardiographic examinations in various fields will be presented. Then an overview of the specifications of the amplifiers used in this work and the capabilities of their original software are given. The final device structure is presented. The system validation process and the properties of the reference devices are illustrated.
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Xia, Kai, Min Yang, and Li Liu. "Study on Internal and External Parameters’ Calibration of Camera Based on Hyperchaos Least Square Method." Advanced Materials Research 889-890 (February 2014): 1038–41. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.1038.
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To Solve how to Calibrate Rapidly and Accurately in Camera, it Proposed the Method of Hyperchaos Least Square and Implemented by Labview through Analyzing the Camera Model and the Calibration Principle. it is that Measuring Image Coordinate and World Coordinate, then Calculating the Important Camera Internal and External Parameters which are R Rotation Matrix and T Translation Matrix Solutions Based on Hyperchaos Least Square Method.
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Sabar, Sabar, Dewi Maulidah Nur Anjani, and Sastra Kusuma Wijaya. "Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation." Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 4, no. 1 (2021): 29–35. http://dx.doi.org/10.15408/fiziya.v4i1.19808.
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This virtual instrumentation system based on Arduino and LabVIEW aims to detect the water level using a water level sensor. The water level sensor used to measure the water level is the Funduino type. This sensor and the buzzer module are connected to the Arduino Uno to transmit data to LabVIEW. When the water has reached a certain height, this sensor will detect the water level. When the water has reached the set point, this sensor will sound a buzzer as a sign that the water is full. Based on the experimental results, it is found that the tension value affects the volume of the experiment site. Where the greater the volume used will produce a large voltage, and vice versa. Furthermore, the graph results obtained that are still away from the linearity of a regression function with a value of y = 0.0079x + 1.8561 and R² = 0.4298.
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Magrupova, M. T., and Yo T. Talatov. "Systematic Approach to Processing and Analysis Diagnostic Indicators of Electrocardiograms Based on Labview." Journal of the Russian Universities. Radioelectronics 23, no. 2 (2020): 82–88. http://dx.doi.org/10.32603/1993-8985-2020-23-2-82-88.
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Introduction. Cardiovascular disease occupies an important place throughout the world, which necessitates the development of more effective modern means of diagnosis and treatment. The primary diagnosis of heart disease is based on analysis and processing of an electrocardiogram (ECG). Despite the fact that there are many methods and algorithms for ECG analysis and processing, one of the urgent problems of cardiology remains to obtain the most complete information about heart electric potential, respectively, the behavior of the waves P, Q, R, S and T.Aim. Development of algorithms and software for processing and analysis of electrocardiograms (ECGs), as well as calculation of heart rate and detection of arrhythmias based on Labview.Materials and methods. The methods for removing noise using the wavelet transform method to eliminate baseline deviation ,to extract ECG signs ,to calculate heart rate and to detect arrhythmias based on Labview have been adopted as a mathematical apparatus for processing and analyzing ECGs.Results. Organizing of the ECG database, developing algorithms for converting the ECG file of the database into a useful format for Labview, processing of the ECG signal with removing noise from the original ECG signal, extracting signs for obtaining ECG diagnostic indicators, calculating heart rate and detecting arrhythmias.Conclusion. An analysis of the results demonstrates that systematic approaches to evaluating ECG signals allow to avoid one-way decisions and to integrate different methods into an integrated system of ideas of the state. The implementation of the proposed algorithms using Labview programming system ensures the removal of noise and artifacts, the extraction of the necessary ECG signs, the calculation of heart contractions and the detection of arrhythmias.
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Lin, Sheam Chyun, Fu Sheng Chuang, and Harki Apri Yanto. "Establishment of a Removable Experiment Platform for VAWT." Applied Mechanics and Materials 284-287 (January 2013): 1046–50. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1046.
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This investigation intends to establish an experimental test platform for a small vertical-axis wind turbine (VAWT), which is installed on the rooftop of a building. The experiment platform designed here is flexible and suitable for executing the systematic performance evaluation on different types of VAWT. By utilizing the data acquisition system (DAQ), all environmental information and power data from sensors and generator on the platform are recorded and transferred to the computer automatically. Later, these analogy signals are transformed to digital format for transmitting into computer. Also, with the aids of a visual software programming within the framework of Labview, the real-time monitoring on the input/output parameters of generator and wind condition on the rooftop can be accomplished simultaneously. Afterwards, the data processing and in-depth analysis on the experimental outcomes are carried out via the established computer program. Consequently, the on-site performance of the wind turbine generator system is attained in an automatic and systematic manner. Moreover, to ensure for providing sufficient data and its accuracy, statistic concept is enforced to judge whether the test data are qualified or not in the data-processing procedure. In summary, together with the data-acquisition software programmed under the framework of Labview, this experimental system can provide the capability for monitoring, recording, and filtering these test data in an rigor manner, and is appropriate for executing the R&D and performance evaluation on different VAWTs.
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He, Zhong Hai, Yi Hao Du, and Zhao Xia Wu. "Generation of Respiratory Flow Having Fractal Signal Feature." Advanced Materials Research 366 (October 2011): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.366.211.
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In this paper how to generate respiratory flow that has fractal signal feature is introduced. Physiological signal have fractal feature have been verified by many researchers, such as heart beat rate, interbreath interval. Mechanical ventilators are used to provide life support for patients with respiratory failure. But these machines can damage the lung, causing them to collapse. On the other hand, fractal feature can be used as an indication of health situation; as a result in patient simulation the physiological signal should also have fractal features. The fractal feature is generated by fractional Brownian motion simulation. The fractal dimension is decided by Hurst exponent in routine. The algorithm is realized by R language and result is input into LabVIEW which have friendly interface and easy for simulation control usage. The method can be used in design of mechanical ventilator and medical patient simulator.
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Mohammed, Ahmed Abd, and Raed Ayad Abduljabbar. "Experimental Study of Hybrid Solar Air Conditioning System in Iraq." Journal of Engineering 24, no. 10 (2018): 32. http://dx.doi.org/10.31026/j.eng.2018.10.03.
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In this paper, an experimental study of the thermal performance for hybrid solar air conditioning system was carried out, to investigate system suitability for the hot climate in Iraq. The system consists of vapor compression unit combined with evacuated tube solar collector and liquid storage tank. A three-way valve was installed after the compressor to control the direction flow of the refrigerant, either to the storage tank or directly to the condenser. The performance parameters were collected by data logger to display and record in the computer by using LabVIEW software. The results show that the average coefficient of performance of hybrid solar air conditioning system (R=1) was about 2.42 to 2.77 and the average power consumption was about 1.1 to 1.12 kW when the ambient temperature was about 34.2 to 39.7 ˚C, while the average coefficient of performance of conventional system (R=0) was about 3.23 and the average power consumption was about 1 kW when the ambient temperature was about 30.8 to 34.3 ˚C. It can be concluded that the use of the hybrid solar system in Iraq with its current form could not be saved electricity.
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Tweedell, Andrew J., and Matthew S. Tenan. "motoRneuron: an open-source R toolbox for time-domain motor unit analyses." PeerJ 7 (December 10, 2019): e7907. http://dx.doi.org/10.7717/peerj.7907.
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Motor unit synchronization is the tendency of motor neurons and their associated muscle fibers to discharge near-simultaneously. It has been theorized as a control mechanism for force generation by common excitatory inputs to these motor neurons. Magnitude of synchronization is calculated from peaks in cross-correlation histograms between motor unit discharge trains. However, there are many different methods for detecting these peaks and even more indices for calculating synchronization from them. Methodology is diverse, typically laboratory-specific and requires expensive software, like Matlab or LabView. This lack of standardization makes it difficult to draw definitive conclusions about motor unit synchronization. A free, open-source toolbox, “motoRneuron”, for the R programming language, has been developed which contains functions for calculating time domain synchronization using different methods found in the literature. The objective of this paper is to detail the toolbox’s functionality and present a case study showing how the same synchronization index can differ when different methods are used to compute it. A pair of motor unit action potential trains were collected from the forearm during a isometric finger flexion task using fine wire electromyography. The motoRneuron package was used to analyze the discharge time of the motor units for time-domain synchronization. The primary function “mu_synch” automatically performed the cross-correlation analysis using three different peak detection methods, the cumulative sum method, the z-score method, and a subjective visual method. As function parameters defined by the user, only first order recurrence intervals were calculated and a 1 ms bin width was used to create the cross correlation histogram. Output from the function were six common synchronization indices, the common input strength (CIS), k′, k′ − 1, E, S, and Synch Index. In general, there was a high degree of synchronization between the two motor units. However, there was a varying degree of synchronization between methods. For example, the widely used CIS index, which represents a rate of synchronized discharges, shows a 45% difference between the visual and z-score methods. This singular example demonstrates how a lack of consensus in motor unit synchronization methodologies may lead to substantially differing results between studies. The motoRneuron toolbox provides researchers with a standard interface and software to examine time-domain motor unit synchronization.
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Wu, Wei Bin, Tian Sheng Hong, Xu Xiang Chen, Shi Ting Yang, and Kai Cheng Chen. "Research of System of Trailer Axle’s Function Test." Applied Mechanics and Materials 44-47 (December 2010): 941–45. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.941.
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Axle is one of the most important parts related to the safety of trailer’s operation on the railroad. In China, the checking of axles is mainly through visual inspection and hammer examinations. The construction of an automation hardware system was simulated by Pro/E, including support, guide rail, sensor, AC servomotor and servo driver conformed to the model. Next, for controlling the operation of the entire system, LabVIEW was used to write a program and to control the rotation of servomotor. The pressure heads controlled by linkage system were utilized to load the axle; meanwhile, through the PCI of NI, the data of pressure and displacement was collected. After calibration, the relative error of pinpointing sensor was 5.207%, and the average relative error was about 1.4%. Analyzed by SPSS, the voltage-load formula's correlation coefficient R is greater than 0.994, while the significance is less than 0.05, showing the regression of great significance. Finally, the capabilities of the simulated axle, such as fatigue, stiffness, intensity and stress, were analyzed carefully.
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Rincón-Quintero, A. D., L. A. Del Portillo-Valdés, A. Meneses-Jacomé, et al. "Manufacture of hybrid pieces using recycled R-PET, polypropylene PP and cocoa pod husks ash CPHA, by pneumatic injection controlled with LabVIEW Software and Arduino Hardware." IOP Conference Series: Materials Science and Engineering 844 (June 30, 2020): 012054. http://dx.doi.org/10.1088/1757-899x/844/1/012054.
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Xu, Gang, Xiaoli Li, Duan Li, and Xiaomin Liu. "A DAQ-Device-Based Continuous Wave Near-Infrared Spectroscopy System for Measuring Human Functional Brain Activity." Computational and Mathematical Methods in Medicine 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/107320.
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In the last two decades, functional near-infrared spectroscopy (fNIRS) is getting more and more popular as a neuroimaging technique. The fNIRS instrument can be used to measure local hemodynamic response, which indirectly reflects the functional neural activities in human brain. In this study, an easily implemented way to establish DAQ-device-based fNIRS system was proposed. Basic instrumentation components (light sources driving, signal conditioning, sensors, and optical fiber) of the fNIRS system were described. The digital in-phase and quadrature demodulation method was applied in LabVIEW software to distinguish light sources from different emitters. The effectiveness of the custom-made system was verified by simultaneous measurement with a commercial instrument ETG-4000 during Valsalva maneuver experiment. The light intensity data acquired from two systems were highly correlated for lower wavelength (Pearson’s correlation coefficientr= 0.92,P< 0.01) and higher wavelength (r= 0.84,P< 0.01). Further, another mental arithmetic experiment was implemented to detect neural activation in the prefrontal cortex. For 9 participants, significant cerebral activation was detected in 6 subjects (P< 0.05) for oxyhemoglobin and in 8 subjects (P< 0.01) for deoxyhemoglobin.
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Ghani, Yasser Abdul Lateef, and Abdul Hadi N. Khalifa. "Energy, Exergy and Anergy Analysis of Vertical Split Air Conditioner Under experimental ON-OFF Cycling." Journal of Engineering 25, no. 7 (2019): 1–20. http://dx.doi.org/10.31026/j.eng.2019.07.01.
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A time series analysis can help to observe the behavior of the system and specify the system faults. In addition, it also helps to explain the various energy flows in the system and further aid in reducing the thermodynamic losses. The intelligent supervisory LabVIEW software can monitor the incoming data from the system by using Arduino microcontroller and calculates the important parameters. Energy, exergy, and anergy analysis present in this paper to investigate the system performance as well as its components. To accomplish this, a 4-ton vertical split air conditioner based on vapor compression refrigeration cycle charged with refrigerant R-22 was modified for experimental analysis. The results showed that during 5400 secs of experimental study, the system shut down once by the software for 5 min. The volumetric and isentropic efficiencies of the compressor were 79.85 % and 64.48 % respectively. The maximum entropy generation was due to the compressor of 3.4 W/K while the maximum anergy was due to the condenser of 1.39 kW. The exergy efficiencies of the compressor, condenser, and the evaporator were 73.57, 40.18, and 47.45 % respectively. The system and Carnot COP were 2.53 and 4.9 respectively. The exergy efficiency of the air conditioning system was 48.7 %.
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Choi, Jek Wang, Lei Lei Shi, Li Jun Wu, Hyeon Woo Kim, Iksu Choi, and Hun Mo Kim. "Design of Self-Tuning Fuzzy Control and Fault Tolerant Error Control Coding Based on Graphic User Interface for Smart Hybrid Powerpack." Applied Mechanics and Materials 574 (July 2014): 528–33. http://dx.doi.org/10.4028/www.scientific.net/amm.574.528.
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The Smart Hybrid Powerpack (SHP) is an electro-hydraulic system which combines the system of Electro Hydraulic Actuator (EHA) and advanced technologies such as network fault tolerance and intelligent control. EHA system has been famous in the industry because that the EHA acts as a power-shift which shifts the power from high-speed electric motor to the high-force of hydraulic cylinder by bi-directional piston pump. If errors in the plant and network occur in the SHP, the system will cause serious malfunctions. To reduce plant noises and network errors, this paper shows the intelligent control method comparing Self-tuning fuzzy with fuzzy control and network fault tolerant error control coding in the SHP. In the intelligent control part, the simulation result shows good performance to reduce plant noises by the self-tuning fuzzy than fuzzy control. In the network fault tolerant error control coding part, proposed scheme also shows good performance by CRC code and Reed-Solomon (R-S) code in two channel (CRT) method than one channel only. We developed LabVIEW Graphic User Interface (GUI) to show these simulation results. Using this GUI, we can save time to experiment and get benefit of guidance to make real program.
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GUIDI, G., N. MAFFEI, A. CIARMATORI, et al. "REAL-TIME LUNG TUMOUR MOTION MODELING FOR ADAPTIVE RADIATION THERAPY USING LEGO MINDSTORMS." Journal of Mechanics in Medicine and Biology 15, no. 02 (2015): 1540019. http://dx.doi.org/10.1142/s0219519415400199.
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An anthropomorphic phantom was built using LEGO Mindstorms® and programmed in LabVIEW® for Adaptive Radiation Therapy (ART) purpose, to simulate the processes of breathing in the lung district during treatments. A thoracic cavity is prototyped by means of an 8 ribs apparatus and 2 artificial tumor masses, driven by intelligent brick LINUX® OS CPU. An optical surface tracking system (VisionRT®) and a QUASAR™ phantom allow correlation between physiological, robotic motion and surrogated signal. Patient's breathing phases are acquired instantaneously by InfraRed/UltraSound sensors. Through 4DCT images, tumor center of mass are individuated and tracked during respiration, to link internal–external organs motion. To quantify the degree of divergences due to dynamics organs deformation, a 4D function was obtained and simulated by our phantom. Sinusoidal signals (6, 10, 12, 15 and 17 Breaths per Minute-BPM) were used for evaluating and commissioning, thereby obtained a correlation coefficient (0.90–0.94) between QUASAR and LEGO. Validated on ideal conditions, phantom was tested in clinical practice. Breaths and CT study of 12 patients were analyzed. Fitting of real breath sinograms returned a mean R value of 0.94 (0.83–0.98) with best model performance achieved in signals with respiratory frequency less than 20 BPM. By using LEGO it is possible to reproduce real patients conditions and simulate normal and even abnormal behavior during the course of therapy, allowing spatial motion estimation.
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Garnier, Lucas, Hervé Lhermite, Véronique Vié, et al. "Photonic micro-resonators for steam evaporation dynamic sensing." European Physical Journal Applied Physics 84, no. 1 (2018): 10502. http://dx.doi.org/10.1051/epjap/2018180170.
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We have investigated the effect of sudden water condensation processes and the behavior of its condensed water prior evaporation, with an integrated resonant photonic structure and dynamic tracking of its transduced signal. The aim of this analysis is to develop a water condensation lab-on-chip sensor, with the possibility of data treatment with an embedded system. Integrated photonic micro-resonator (MR) devices have been designed and fabricated with polymer UV210 by means of Deep-UV photolithography. Thanks to this technique, we have achieved racetrack shaped micro-resonators coupled to suited access waveguides. We have assessed such MRs with different geometrical characteristics while changing, respectively, the coupling length (LC), the radius of curvature (R) and the width (w) of the guides. The chosen values for the set of parameters LC-R-w (in μm) are 5-5-3 and 10-10-3. The laser source used with the injection bench is a Gaussian broadband laser (λcentral = 790 nm, FWHM = 40 nm) allowing us to visualize several resonances at the same time in order to multiplex the relevant measurements. The transduced spectrum is then acquired with an optical spectrum analyzer (OSA) linked to a computer with Labview and MATLAB software recording and processing data in real time. Then, relevant characteristics to be tracked are the Free Spectral Range (FSR) and the transmitted energy; these quantities can be linked to the physical characteristics of the structure considering both the effective refractive index and the absorption coefficient. The experimental setup also includes various movies with a top-view imaging camera of the chip (MRs) recording the soft matter process steps, so as to correlate the changes in the transduced spectrum and the behavior of the condensed water mechanisms (condensation, coalescence and evaporation). Then, the chip is fitted with a temperature controller, so as to carry out measurements at different temperatures: 20, 24 and 28 °C.
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Khvorenkov, V. V., A. I. Nistyuk, R. A. Khatbullin, and A. A. Zykin. "Building a System for Monitoring and Testing Radio Systems As an IoT Element." Bulletin of Kalashnikov ISTU 21, no. 3 (2018): 155. http://dx.doi.org/10.22213/2413-1172-2018-3-155-165.
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Взаимодействие сетей различного уровня проявилось в появлении такого понятия, как «интернет вещей». Освоение области интернета вещей без радиоканала затруднительно, поскольку радиоканал обеспечивает одно из главных преимуществ - подвижность объектов и мобильное переконфигурирование структуры. Построение структуры «индустриальный интернет» в части построения системы контроля и тестирования радиосистем является актуальной задачей. В качестве одного из вариантов построения и организации индустриального интернета как элемента интернета вещей авторы рассматривают систему контроля и тестирования радиосистем, построенную на базе приборов и оборудования фирмы Rohde & Schwarz. Основными возможностями контрольно-измерительного оборудования и программного обеспечения в составе предлагаемой системы удаленного управления с архитектурой IoT являются: - формирование радиосигналов с различными видами модуляции (манипуляции) на различных частотах; - имитация сигналов радиопомех; - имитация приемопередающих систем; - имитация передачи и приема различных видов (протоколов) цифровых данных; - измерение параметров радиосигналов, их верификация (например, с результатами математического моделирования) и сохранение в базе данных; - выполнение тестирования изделий, измерение параметров. Моделирование формирования радиосигналов осуществляется в среде разработки LabVIEW и с помощью универсального программируемого приемопередатчика USRPX300. Развитие архитектуры IoT (интернета вещей) в направлении приложений «индустриальный интернет» как элемента IoT позволяет выполнять задачи построения систем контроля и тестирования радиотехнических изделий. Преимущества предлагаемой структуры: - можно создать несколько универсальных центров уровня сетей датчиков IoT для предоставления услуг по исследованию, тестированию и контролю радиотехнических изделий с использованием универсального дорогостоящего оборудования, например, фирмы R&S и других, что не могут позволить себе множество организаций и учебных заведений; - применение технологий IoT позволит иметь удаленный доступ с уровня приложений к центрам уровня сетей датчиков и решать задачи вне зависимости от физического расположения, что может быть также актуально при разработке и производстве различных элементов изделия разными фирмами, разделенными территориально; - технология IoT может быть использована для других систем контроля, отличных от радиотехнических систем, где имеется возможность удаленного взаимодействия элементов системы, например, для контроля сохранности взаимоположения внутренних элементов конструкции объекта.
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Chow, Kelvin, Emerson P. Grabke, Jae Lee, Jaeeun Yoo, Kristin E. Musselman, and Kei Masani. "Development of Visual Feedback Training Using Functional Electrical Stimulation Therapy for Balance Rehabilitation." STEM Fellowship Journal 3, no. 2 (2017): 1–2. http://dx.doi.org/10.17975/sfj-2017-016.
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Individuals with incomplete spinal cord injuries (iSCI) often experience impairments in motor control of lower-limb muscles, causing a lack of balance when standing. These individuals are usually heavily dependent on others, reducing their self-sufficiency and quality of life. Our previous study has shown that visual feedback training (VFT) of tracking an individual’s center of pressure (COP) can improve balance stability of those with iSCI (1). Another of our previous studies demonstrated that functional electrical stimulation (FES) augments therapeutic effects in general (2-8). Thus, VFT in combination with FES is hypothesized to improve the standing balance ability of individuals with iSCI more effectively than a VFT or FES system. The purpose of this study was to develop a novel therapeutic system by combining VFT with FES. We developed this system by utilizing LabVIEW (17.0, National Instruments Corp., Austin, USA). The system hardware consisted of a force plate, an electrical stimulator, and a computer. The COP was calculated using the force plate signals, which was displayed in the monitor in front of the participant. We developed four COP-based games, each forcing the participant to shift their COP in various movement patterns. FES will provide electrical stimulation to participant plantarflexors and dorsiflexors to assist with movements, in which stimulus intensity will be modulated through a proportionalderivative (PD) feedback controller that mimics the physiological control system for standing (9,10). In this study, we tested the practicality of our VFT games with seven able-bodied participants (age 19-24 years). Each participant performed a balance assessment before playing the VFT games to determine their balance ability. Our focus was on developing effective VFT games and assessing each participant’s balance ability against their VFT game scores. Three out of four games showed a significant bivariate correlation between balance ability and VFT scores (r > 0.754 for n=7), indicating that the games were appropriately designed. The validity of the FES controller was demonstrated in another study to be effective. The parameters of the PD controller were optimized so that the stimulation intensity would match the natural muscle contraction of the plantarflexors and dorsiflexors, acquired through electromyography (EMG) signals. It is expected that rehabilitation combining VFT with FES will improve static and dynamic balance stability in a more effective way than isolated therapy techniques. Since this study has shown the validity of our VFT games, we would like to integrate the VFT and FES systems and run clinical trials on patients with iSCI, with the goal of improving their balance ability in the future. Through visual feedback training, the brain improves spatial awareness by visualizing their body displacement and orientation. Applying stimulation to the muscles re-trains the central nervous system and, over time, allows patients with iSCI to partially regain motor control. Thus, the proposed system will help individuals with iSCI improve their balance ability and increase their quality of life.
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Zhu, Feibai, Mohamed AbuAli, Jay Lee, Preston Johnson, and Michiharu Kubo. "213 Introduction to NI LabVEW-based Watchdog Agent[○!R]Toolkit for Prognostics & Health Management." Proceedings of the Symposium on Evaluation and Diagnosis 2011.10 (2011): 138–43. http://dx.doi.org/10.1299/jsmesed.2011.10.138.
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Nouri, Jamshid Malekmohammadi, Ioannis Vasilakos, and Youyou Yan. "Cavitation between cylinder-liner and piston-ring in a new designed optical IC engine." International Journal of Engine Research, April 9, 2021, 146808742110080. http://dx.doi.org/10.1177/14680874211008007.
Full textAbstract:
A new engine block with optical access has been designed and manufactured capable of running up to 3000 r/min with the same specification as the unmodified engine. The optical window allowed access to the full length of the liner over a width of 25 mm to investigate the lubricant flow and cavitation at contact point between the rings and cylinder-liner. In addition, it allowed good access into the combustion chamber to allow charged flow, spray and combustion visualisation and measurements using different optical methods. New custom engine management system with build in LabView allowed for the precise full control of the engine. The design of the new optical engine was a great success in producing high quality images of lubricant flow, cavitation formation and development at contact point at different engine speeds ranging from 208 to 3000 r/min and lubricant temperatures (30°C–70°C) using a high-speed camera. The results under motorised operation confirmed that there was no cavitation at contact points during the intake/exhaust strokes due to low in-cylinder presure, while during compression/expansion strokes, with high in-cylinder pressure, considerable cavities were observed, in particular, during the compression stroke. Lubricant temperatures had the effect of promoting cavities both in their intensity and covered ring area up to 50°C as expected. Beyond that, although the cavitation intensity increases further with temperature, its area reduces due to possible collapse of the cavitating bubbles at higher temperature. The change of engine speed from 208 to 800 r/min increased cavitating area considerably by 52% of the ring area and was further increased by 19% at 1000 r/min. After that, the results showed very small increase in cavitation area (1.3% at 2000 r/min) with similar intensity and distribution across the ring.