Assam Don Bosco University Journals
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An Article on Optimal Heat Extraction for Clean Geothermal Power Generation using Graphene Wire
Get PDFImplementation of DSM-PI Controller in SEPIC- ZETA Integrated converter for Plug-in Electric Vehicle
Get PDFCharacter Segmentation Technique for Printed and Handwritten Devanagari Script without Extraction of Shirorekha
No full textIn India, there is a lot of literature available in the Devanagari script as well as Devanagari is most frequently used for written, oral correspondence and documentation reasons. How correctly the character segmentation of the Devanagari content is done, will ultimately decide the exactness of the OCR process. In this paper, we have proposed the character segmentation strategy along with existence of Shirorekha framed for printed as well as handwritten text written in Marathi language. Several methods utilized for pre-processing the document images like document binarization, skew identification and correction are discussed in this paper. We took vertical projection of the segmented words, compared the pixel count with the automatically calculated threshold and then characters were separated. With the proposed strategy, we have achieved 100 % exactness in line and word segmentation and results accomplished for character segmentation are a lot of encouraging. No standard dataset of Marathi characters is available having upper and lower modifiers. Non-availability of the standard datasets with modifiers is a significant issue in using a deep learning network for perceiving the Devanagari characters. The segmented characters with the presence of Shirorekha can be straightforwardly utilized for developing the deep learning OCR framework
HARMONIC MITIGATION AND REACTIVE POWER COMPENSATION USING SHUNT ACTIVE FILTER WITH PI CONTROLLER
Get PDFDue to the advancement of electrical equipment as most of the load is the nonlinear poor quality of electric supply caused. This paper describes a shunt active filter for power quality improvement. It deals with the problem related to harmonics due to the nonlinear load. The Harmonic current is drawn with the aid of the nonlinear burden from the supply which results in a distortion of the voltage waveform in a supply-side. This distorted voltage and current may make conductors heat up and can lessen the effectiveness and future of the gear. With the goal that the decrease of harmonics is significant in nowadays life. This filter is utilized to make up for sounds reduced harmonics and receptive power. Three-phase thyristor loads are taken as a nonlinear load. For thyristor 180° scheme is used here. Thyristors are fired for seven different values of firing angle from 0° to 60°. The exhibition of a three-stage shunt dynamic power channel utilizing the instantaneous power hypothesis with a PI controller is clarified in this paper. Simulations are carried out using MATLAB/SIMULINK. simulation results are presented
ISODATA classification using Fuzzy Logic
Get PDFIn current days remote sensing is mainly recent application in many sectors. Remote Sensing (RS) refers to the science of identification of earth surface facet and analysis of their geo-biophysical property via electromagnetic emission as a model for interaction. Spectral, spatial, temporal and polarization signatures are key features of the sensor/target, which make easy target bias. Earth surface data seen by the sensors in altered wavelengths (reflected, scattered and/or emitted) is radio metrically and geometrically right by extraction of spectral data. RS data is a synoptic read, pedestrian exposure with calibrate sensors to work out changes, observations at various resolutions, deals with a alternative for normal resources management as compare to standard methods. This remote sensing utilizes dissimilar images like multispectral, hyper spectral or ultra-spectral. The remote sensing image classification is being of the significant methods to sort image. In order to state we classify the ISODATA classification amid fuzzy logic. In this we experimenting fuzzy logic be affectionate of spatial, spectral texture methods in that dissimilar sub methods to be worn for image classification
HYDROTHERMAL SYNTHESIS OF CuO NANOPARTICLES AND A STUDY ON PROPERTY VARIATION WITH SYNTHESIS TEMPERATURE
Get PDFMetal-oxide (CuO) nanoparticles were synthesized by hydrothermal method within a self-designed stainless-steel autoclave, sealed and heated at various temperature. X-ray diffraction analysis (XRD) revealed the single-phase monoclinic structure of CuO nanoparticles with an average grain size of 25, 33, and 66 nm at 105, 120, and 150 0C temperature respectively. Fourier Transform Infrared (FTIR) spectroscopy identified the representative bands of copper oxide nanoparticles at 609.51 507.28 cm-1, 519.15 605.65 cm-1 and 518.85 611.43 cm-1 for temperature of 105, 120 and 150 0C respectively. UV-Vis spectroscopy determined a broad characteristics absorption band of CuO nanoparticles near about 300 nm for three different temperatures. CuO nanoparticles prepared at highest temperature (150 0C) exhibited the most transmittance among the three. By using Tauc plot, Bandgap was calculated of 1.55, 1.60 and 1.88 eV for three samples prepared in 105, 120, and 150 0C respectively. Electrical properties of CuO nanoparticles exposed that the resistivity decreases by increasing the temperature which was in accordance with the well-known semiconductors. Impedance analyzer revealed that dielectric constant and Q-factor of CuO nanoparticles were increased along with the increasing temperature. Shape and size of CuO nanoparticles were varied with preparation temperature. Moreover, the adding temperature of solution of NaOH and CuCl2.2H2O had an important influence on the shape and size of CuO nanocrystals. The as-synthesized CuO nanoparticles can be potential candidate to be used in electronic devices, including solar cell applications
Autonomous Tour Guide Robot using RF Module
Get PDFTourists and tourist locations are a major source of income to any country’s economy. A good tourist location can help improve the economic standard of a place. So it is very important that there are adequate measures to improve the tourism sector. The best way to see and enjoy a place is on our own, because when we find out a thing on our own, the experience remains with us ever. This is the main idea that brought us to make this project. We are presenting in this paper a tour guide robot that will take tourists through a location of interest, using a robot navigator. The device is equipped with an Arduino module that controls the device. The user needs to use a mobile application to pair with the device and start the robot, once started it will take the user to different locations and will inform him of the details or importance of each location. The device is also equipped with a panic button and a heart-rate sensor that helps to inform the authorities if any emergency situation arises
Simulation and Analysis of Variable Gain DVCC Based Active Inductance and its Application in Constant K Prototype and Resonance Filter
Get PDFThe inductor is an essential component in many electronic systems. But the passive inductance is not suitable due to its dimension and magnetic interference. To overcome these issues, active inductance is preferred. Active inductance is simulated using the RC network connected with an active device(s). Here, VG-DVCC (Variable Gain Differential Voltage Current Conveyor) is proposed as an active device. The VG-DVCC with two external R and one C component forms the Impedance Converter which converts Active RC network into Active Inductance. This paper gives an overview of the design-simulation of Active Inductance and the frequency range analysis of its linearity. Also, it highlights applications in the realization of constant k-prototype and resonance filters
A Review on PAPR Reduction in Perspective of BER Performance in MIMO-OFDM Based Next Generation Wireless Systems.
Get PDFToday, high speed and trustworthy wireless communication over mobile is the requirement of society. As the mobile applications and the users are rapidly increasing, it is obligatory to have more reliable, high speed wireless network with high throughput, which will combat the disadvantages in existing system in this multiuser environment. In wireless system the received signal may be corrupted due to noise and interferences such as ‘inter symbol interference’ and ‘inter carrier interference’ when subjected to multi-path fading. Also the performance the system may be affected due to poor ‘bit error rate’ and high ‘peak to average power ratio’ value, which further affect the signal power and spectral efficiency of transmitted signal. The blend of ‘orthogonal frequency division multiplexing’ and ‘multi input multi output’ antenna system referred as MIMO-OFDM system, which offers the improvement in quality of service and higher throughput to satisfy the tomorrow’s need. This review article mainly focuses on various technologies adopted by different researchers for enhancing the ‘bit error rates’, ‘peak to average power ratio’, ‘signal to noise ratio’ and ‘spectral efficiency’ performances in wireless systems. We continue by highlighting the limitations and comparing results of conventional methods, schemes and algorithms proposed by different researchers. We also focus on the multiple antenna system (MIMO), which is designed for future multiuser environment to enhance the capacity or to have high throughput along with good quality services
An estimation of long endurance power supply system for a rotary wing unmanned aerial vehicle
Get PDFThe vast applications of unmanned aerial vehicle (UAV) have made it versatile. However, this battery powered vehicle has a short flight time thereby limiting its performance. Therefore, this paper represents the analysis of two power systems to obtain a better performing system with longer duration. Thus, to obtain a long endurance power system, the regular battery was compared to the tethering mechanism power supplier. The power utilized by the two systems differed, hence, the performance parameters were compared to obtain feasibility of the system. Both the theoretical and experimental parameters were evaluated to estimate the accuracy. The comparative experiments would help to implement better device for the tethering mechanism to increase its efficiency and comprehend its durability