Design of ultra-thin projection system with curved screen based on Zernike free-form surfaces

Study on the wedge method and shielding efficiency of bullion thread;

The shielding rate of high-energy X-and β-radiation, the size of nanometer lead or nanometer lead sulphate in the samples, were measured.

This paper describes the method of a modularized structure drivers system design of LED interests rate screen for bank, based on multi `computer communication, and gives a prefect function instance to show the mechanism of its hardware and the design idea of its software.