Radiation from an axial electric dipole with prolate spheroidal metamaterial cloak cover
Exact analytical expressions for the electromagnetic field due to a dipole source located inside and along the axis of symmetry of a prolate spheroid are provided.
Symmetry Properties of Spheroidal Functions With Respect to Their Parameter
Spheroidal wave functions depend on a parameter <inline-formula> <tex-math notation="LaTeX">$c$ </tex-math></inline-formula>. Their behavior with respect to changes of sign of <inline-formula> <tex-math notation="LaTeX">$c$ </tex-math></inline-formula> is investigated, and explicit formulas are provided. Sample applications of the resulting symmetry rules are provided for some electromagnetic scattering problems.
Application design of a sun-tracking system
As a very good renewable energy, solar energy gets a lot of countries' concerns. How to improve the efficiency of solar panel is now a hot topic and sun tracking is one of the solutions. In this paper, a servo tracking system using dSPACE DS1104 R&D controller board is designed to improve solar collection efficiency. It combines electro-optical tracking and sun trajectory tracking, and can keep solar panels perpendicular to the sun during daylight hours. In order to reduce the amount of computation, a T-S fuzzy system based sun trajectory tracking is proposed. Because of the seamless connection between dSPACE and MATLAB/Simulink, the development cycle time is short. Experimental results show that the system can track the sun precisely and has higher efficiency.