The purpose of this short note is to show that the Christoffel–Darboux polynomial, useful in approximation theory and data science, arises naturally when deriving dual problem semi-algebraic D-optimal experimental design statistics. It uses only elementary notions convex analysis. Geometric interpretations algorithmic consequences are mentioned.

In order to ensure canopy area coverage with the most compact mechanical configuration possible, this paper proposes a optimization design method of dual-manipulator meet research and development needs an apple-efficient harvesting robot using typical tree shape “high spindle” in China as object. A Cartesian coordinate two groups vertically synchronous operations three-degree range motion based...

This paper introduces a Design of dual reflector Cassegrain feed system antenna with suitable design aspects like smaller reflector and sub reflector diameter for higher sub reflector efficiency, lower Cassegrain blockage losses and desired illumination taper. Design parameters are computed from the simple and explicit analytical formulas. Design example is represented to differentiate the effi...

In this paper, different topologies of dual-frequency modified 3-way Bagley polygon power dividers are designed and analyzed. Equal split power division is achieved at arbitrary design frequencies. In the first structure, two-section transmission line transformer is used to realize the dual-frequency operation. In the second and third structures, dual-frequency T-shaped and π-shaped matching ne...

QFN packages have become mainstream designs for mobile applications. As more applications adopt the QFN style packages, I/O count requirements are increasing. The typical method for increasing pin count in a QFN package is to increase the body size to accommodate the additional lead fingers. This is undesirable though, as mobile device users are pushing for smaller package sizes. By using a dua...