Through introduction of the principle and characteristics of electron beam machining technology, the application status and application instance of electron beam in research of materials science and materials processing in recent years were introduced in detail. The research situation of the previous various electron beam machining methods and applications was discussed, and the various research results were analyzed, thus concluded that the emphasis and advantages of the electron beam machining technology in the application of various materials.

Through introduction of meso-damage theory and application situation in recent years, the related categories and mechanism of meso-damage were analyzed. The previous research on the application of the meso-damage of various materials was discussed and various research results analyzed. The emphasis and advantages of meso-damage theory in material application were concluded.

Making use of the low energy electron beam produced by the accelerator of Dynamitron which has 1-3 Mev energy and 90KW maximum power, GaN based blue LED is proceed by the electron beam irradiation. The color and luminosity parameter of the irradiated LED are contrasted with the unirradiated LED. The experimental result is analyzed and discussed. The results show that the dominant wavelength is shifted, the color purity is improved, the flux and the optical efficiency are dreased by the electron beam irradiation. We also find that the displacement of atoms in LED quantum well, the non-complex compound and minority carrier lifetime is reduced by the electron beam irradiation.

The conventional PWM converter topologies limit the operation to lower switching frequencies because of the minimum ON-time of the transistor switch. The quadratic feature is interesting for application where a wide voltage range is necessary, a quadratic buck-boost converter is presented. The converter cell is showed, the quadratic buck converter with the converter cell can convert to the quadratic buck-boost converter without increasing elements.

This paper discusses the particles irradiation effect of solar cells, particles irradiation damage mechanism of the solar cell are summarized. Through in-depth analysis and summary of predecessors' research results, proposed a variety of means such as electron irradiation, cobalt 60 irradiation and proton irradiation research the irradiation damage effect of polysilicon batteries. Through comparative analysis for rules, and for new materials research of the battery, improving preparation technology of the solar cell and monitoring the production process providing some reference of improving the radiation resistance and electrical performance of the battery.