Energy spectrum, wave functions and binding energies of the electron to the donor impurity ion located in the center of a multilayer spherical quantum dot (MSQD) consisting of a core and two spherical shells were studied within the effective mass approximation.Based on the exact wave functions of the electron expressed in terms of Coulomb functions
Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids
Harmonics are regarded as one of the main challenges in a microgrid.This issue may even get worse when different distributed generators (DGs) work together to solve the load sharing problems due to mismatched feeder impedances and diversified DG ratings.Even though load sharing can be achieved, the microgrid suffers from voltage unbalance and total
Progress, challenges, and future perspectives of robot-assisted natural orifice specimen extraction surgery for colorectal cancer: a review
Abstract With the continuous advancements in precision medicine and the relentless pursuit of minimally invasive techniques, Natural Orifice Specimen Extraction Surgery (NOSES) has emerged.Compared to traditional surgical methods, NOSES better embodies the principles of minimally invasive surgery, making scar-free operations possible.In recent year
Thermal decomposition of a reacting chemical in a stepped rectangular channel with multiple obstacles
This study was considered realizing the immense application in petroleum, chemical and fuel industry of the conjugate effect of heat transfer and chemical reaction on the laminar fluid flow through a channel with several obstacles.Numerical simulation was conducted using the finite element method with the aid of COMSOL multi-physics software to rel