in present pet/ct scanners, pet attenuation correction is performed by relying on the information given by ct scan. in the ct-based attenuation correction methods, dual-energy technique (dect) is the most accurate approach, which has been limited due to the increasing patient dose. in this feasibility study, we have introduced a new method that can implement dual-energy technique with only a si...

the biggest challenges faced in big cities are greenhouse gas emission and growing energy needs. efficient utilization of existing infrastructures has a prominent role in response to the challenges. energy hub approach embraces performance of different energy networks. energy hub is defined as a super node in electrical system receiving distinctive energy carriers such as gas and electricity in...

Abstract Focused Energy is a new startup company with the goal of developing laser-driven inertial fusion energy for electrical power production. The combines results from decades fundamental research in confinement at universities and national laboratories flexibility speed company. has chosen direct-drive, proton fast ignition approach to reach ignition, burn high gain as most promising appro...

this research presents a mathematical model for the optimal allocation of oil and gas to different sectors in iran using operations research techniques. sectors are residential, commercial, transportation, industries, agriculture, exports, injection to oil reservoirs and power plants as a secondary energy producer. optimal allocation of energy resources to end-users from 2011 to 2021 has been d...