Partial shading reduces the power output of solar modules, generates several peak points in P-V and I-V curves and shortens the expected life cycle of inverters and solar panels. Electrical array reconfiguration of PV arrays that is based on changing the electrical connections with switching devices, can be used as a practical solution to prevent such problems. Valuable studies have been perfor...

The partial shading effect (PSE) is responsible for most power losses in a photovoltaic (PV) system. By modifying the interconnections between PV modules, called array reconfiguration, it possible to improve output under conditions (PSCs). Compared research on static PSCs, impact of dynamic PSCs arrays rarely mentioned, although deserves be studied. This paper studies PSE four traditional confi...

the need for clean groundwater resources to have sustainable development in a country is undoubted. due to the importance and high quality of karstic waters in supplying water in iran especially in shahrood city, it is attempted in this research work to recognize and explore karstic waters in southwest of tepal area, shahrood. for this purpose, integration of the results obtained from the metho...

Design and analysis of reconfigurable VLSVWSI array architectures is an increasingly complicated task, especially in evaluating the impact of reconfiguration mechanisms on performance, overhead, and yield. In this paper, we present an integrated computer-aided design environment, the VAR (VHDLbased Array Reconfiguration) system, for the tasks of design, diagnosis, reconfiguration, simulation, a...

The desire for low power multifunction radios for the DoD is driving interest in reconfigurable RF architectures. While software reconfiguration is the ultimate goal, data conversion power and dynamic range limitations imply that some of the reconfiguration has to take place in hardware. Two RF reconfigurable hardware components that can be integrated onto a single chip will be described in thi...

We have characterized the ON state DC electrical resistivity and OFF state capacitance of GeTeBased RF Switches under direct optical laser excitation. Our tightly-coupled dipole array exhibits performance in excess of 4 to 1 bandwidth over wide-scan angle up to 60 degrees with in-band rejection capability using reconfigurable baluns. Integration of optically-controlled GeTe-Based RF switches at...

High-speed reconfigurable processors incorporating a reconfigurable memory and microprocessor array into a chip have been developed [1]. Such devices use a context-switching method. Their internal reconfigurable memory includes reconfiguration contexts of 16 banks. One bank includes a reconfiguration context used for ALUs that can be changed to others on a clock in nanoseconds. These devices ha...

To date, some types of Optically Reconfigurable Gate Arrays (ORGAs) have been developed to realize capabilities of rapid reconfiguration with numerous reconfiguration contexts. However, the layout style requires a shield against the reconfiguration light irradiation to guard transistors that constitute the gate array. This paper presents a shield effect for a circuit that is implemented on a ga...

in recent years, in iran and other countries the power systems are going to move toward creating a competition structure for selling and buying electrical energy. these changes and the numerous advantages of dgs have made more incentives to use these kinds of generators than before. therefore, it is necessary to study all aspects of dgs, such as size selection and optimal placement and impact o...