Power Electronic Converters for Single-Phase Grid Connected Photovoltaic System: An Overview

The Solar photovoltaic (PV) power system have achieved meteoric rise through the years. The uptake is not difficult to explain – a drop in cost of PV systems and spiraling electricity cost, have  encouraged the end-user to lessen their bills by producing cheaper electricity and can generate revenue  by feeding excess power back to the grid. The solar PV is intermittent in nature so it dependent on irradiance and ambient temperature. Power electronics technologies plays an important part for optimizing the energy harvesting from PV system. In order to get maximum extracted power and ensure the load is supplied with a good quality voltage, different dc-dc converters topologies and inverters configurations are used. This paper provides an overview of PV inverter configurations and DC-DC topologies to offer a useful insight and reference point for the researchers working in the field of photovoltaic system

Optical Character Recognition System for Sindhi Text: A Survey

Optical character recognition is popular field for researchers during last decade of research, which is able to successfully recognize the scanned English image into editable text form. However, optical character systems for other regional languages such as Urdu, Arabic, and Sindhi, still presents a huge challenge and implementation problems. Thus, in this paper various techniques of optical character recognition system for such low level regional languages have been discussed and analyzed. This survey paper consolidates all such techniques and presents an overview to aid researcher understand the methodology of performing and implementing OCR system for Sindhi language