Abstract: Provided are a waste gas processing device, a vacuum coating system, and an operation method of the waste gas processing device. The waste gas processing device is configured to remove and recover arsenic in the waste gas, and includes a condensation portion and a scraping portion. The condensation portion is provided with a condensation cavity, and an air inlet, an air outlet and a discharge port communicated with the condensation cavity. A partial surface of the scraping portion abutting against an inner wall surface of the condensation cavity. The present disclosure solves a problem in a conventional art that an economic cost of a waste gas processing device is too high during the removal and recovery of arsenic in waste gas.

Abstract: Provided are a waste gas processing device, a vacuum coating system, and an operation method of a waste gas processing device. The waste gas processing device is configured to remove and recover arsenic in waste gas, and includes a condensation portion and a scraping portion. The condensation portion is provided with a condensation cavity, and an air inlet, an air outlet and a discharge port communicated with the condensation cavity. The condensation portion is configured to cool waste gas charged into the condensation cavity from the air inlet, so that gaseous arsenic in the waste gas is condensed on an inner wall surface of the condensation cavity by cooling to form solid arsenic. The scraping portion is rotatably provided in the condensation cavity, and a partial surface of the scraping portion abuts against the inner wall surface of the condensation cavity.

Abstract: Systems and methods that optimize approximation functions are provided. In one example, a method that approximates a particular expression over a sample space of input values is provided. The method may include the steps of splitting the sample space of the input values into sub-regions; associating a polynomial function for each of the sub-regions; optimizing each polynomial function over the respective sub-region; and optimizing all polynomial functions over the sample space.

Abstract: A quasi-axial optical imagery projection system is disclosed in this paper. The system includes optical imagery sets; each may be lenses, mirrors, or a combination of both. The system also has a light source close to an imager, which may be a planar mask with a pattern, a LCD imager, or other suitable imagers. The system also has a display screen. Both the imager and the display screen are set at acute angles with respect to an optical axis so that what is projected on the display screen is a magnified image of the imager by a magnification factor that has a transverse component and a longitudinal component. This quasi-axial projection system may be made thinner than other rear projection system of comparable screen size.

Abstract: A confectionery composition comprising: (i) an effective amount of a natural plant extract selected from tea, gold thread, honeysuckle, magnolia extracts and mixtures thereof; (ii) an oral care active selected from the group consisting of anti-calculus agents; anti-plaque agents; fluoride ion source; desensitising agents; oral malodour control agents; H2 antagonists; and mixtures thereof; (iii) less than about 10% water; and (iv) a suitable confectionery carrier material.

Abstract: Systems and methods that optimize approximation functions are provided. In one example, a method that approximates a particular expression over a sample space of input values is provided. The method may include the steps of splitting the sample space of the input values into sub-regions; associating a polynomial function for each of the sub-regions; optimizing each polynomial function over the respective sub-region; and optimizing all polynomial functions over the sample space.

Abstract: A confectionery composition comprising: