Abstract: A UV/O3/H2O2 advanced oxidation reactor includes a water inlet pipe, a water outlet pipe, an ultraviolet reactor, an H2O2 adding device and an O3 adding device. The ultraviolet reactor has a plurality of ultraviolet lamps embedded therein, and the ultraviolet lamps are arranged at an angle with respect to partition plates. The water inlet pipe is connected to a water inlet in a lower portion of the ultraviolet reactor, and the water outlet pipe is connected to a water outlet in an upper portion of the ultraviolet reactor. The H2O2 adding device and the O3 adding device are arranged on a connecting pipe of the water inlet pipe. After raw water is pressurized, H2O2 is added into the raw water through the H2O2 adding device, then ozone is added in the raw water through a water injector, and finally the raw water enters the ultraviolet reactor.

Abstract: A system and method for monitoring real time stress development of laser additive manufacturing. In some embodiments, the system comprises a laser machine, a laser deposition head, an illumination laser, a line laser, two CCD cameras, a spectrum meter, a computer, and an ultrasonic shot head. The CCD camera can record the molten pool height and the line laser can be directed behind the molten pool to measure the shape and/or height of the newly formed layer. The computer builds a real-time FEM model of the layer, calculates the displacement of the solidified surface, and then calculates the stress formed in the layer. The spectrum meter monitors for non-stress induced defects. The data is transferred into a computer to determine whether defects will occur and control the laser deposition and ultrasonic shot head to treat the area and prevent emergence of stress induced defect.