Informatics Publishing Limited

N. Kumari Kala ¹, D. Sarala ¹, V. Megha Thomas ¹, Raisa Elias ¹

Affiliations
1 EEE Dept., SKR Engg. College, IN

Abstract

This paper presents the simulation and implementation of Z-source inverter fed induction motor using PWM technique.The Z-source inverter employs a unique impedance network couple with inverter main circuit. Z-source inverter is used to reduce the line current harmonic, improves the input power factor, high reliability and extends output voltage range. Pulse Width Modulation variable speed drives are increasingly applied in many new industrial applications that require superior performance. PWM technique is used to control the frequency and voltage. It is also used to reduce the line current harmonics. The circuit will be simulated using MATLAB and implemented using embedded controller. Both simulation and hardware results will be verified.

Keywords

Z-Source Inverter, Pulse-Width Modulation (PWM).

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K. Rajesh ¹, D. Sarala ², V. Venkataraman ², K. Kannan ²

Affiliations
1 Department of Computer Science, SASTRA University, Thanjavur - 613401, Tamil Nadu, IN
2 Department of Mathematics, SASTRA University, Thanjavur - 613401, Tamil Nadu, IN

Abstract

Objective: Classification of cloud images through segmentation of automated satellite images to improvise the level of accuracy. Method Analysis: To classify cloud images the hyper graph model uses the idea of maximally bonded subsets that is endowed with integer valued metric are applied to receive the classifications. The widely used hyper graph model is Intensity Neighborhood Hyper graph (INHG) and representation model in this article is Intensity Interval Hyper graph (IIHG). Findings: The results obtained through this process is proved to be more accurate and the time complexity is O(n) in weather prediction. Similarly, the results received through IIHG, which also provides the same computational complexity where all the pixels to be processed with less time. Enhancement: The proposed methodology increases the accuracy level of prediction with less computation time and this work can be enhanced by including pattern recognition in automated processing.

Keywords

Hyper Graph, INHG, IIHG, Satellite Imagery, Segmentation.

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D. Sarala ¹

Affiliations
1 Department of Physics & Electronics, St. Ann’s College for Women, Hyderabad, IN

Abstract

In the present 21 ^st century many people are looking for the methods to improve life conditions, comfort and at the same time the simplicity of handling with domestic electric appliances. Automation through mobile is a desired option when the user is outside the premises, where the appliances need to be controlled. Unlike other hand-held units, a mobile can be easily operated by the visually impaired and physically challenged persons also. To provide security to the network so that nobody else makes a call to the mobile circuitry and misuses the facility, an authentication code is provided. This paper discusses the different features of home automation.

Keywords

Automation, Comfort, Visually Impaired, Physically Challenged, Networks, Security.

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D. Sarala , Sunita Jacob

Abstract

Digital image processing deals with manipulation of digital images through a digital computer. It is a subfield of signals and systems, but focuses   particularly on images. DIP focuses on developing a computer system that is able to perform processing on an image. The input of that system is a digital image and the system processes that image using efficient algorithms, and gives an image as an output. This paper discusses the various image processing techniques and remote sensing applications.

Keywords

digital, image, processing, remote sensing, algorithm and data

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