Nowadays, the inner shape and economic viability of a stone block is dependent on skill experience “expert” that makes predictions based external observations. This actual procedure an extremely high empirical method, when it fails, substantial work, time, money wasted. At present, researchers are committed to developing models predict internal structure non-destructive tests. Ultrasonic tomogr...

Accurate and complete vaccine volunteer’s data are one valuable asset for clinical research institutions. Privacy protection the safe storage of vital concerns during trial services. The advent block-chain technology fetches an innovative idea to solve this problem. As a hash chain with features decentralization, authentication, resistibility, blockchain-based can be used safely store volunteer...

This paper includes modeling and simulation of 180 MW units of pumped storage power plant with Variable speed machines. In this method, voltage source inverters are used instead of traditional cyclo-converters. This paper aims to control the voltage source inverters and maintain DC voltage at a constant value. AC/ DC/ AC converter is used in system configuration structure in order to control an...