Abstract: A cleaning system includes a cleaning device, a tray, a charging assembly, a body and a floor brush assembly. The floor brush assembly has rollers which rotate around an X-axis, and can rotate at least in the X-axis direction relative to the body. The charging assembly has a male charging end and a female charging end, wherein one of the male charging end and the female charging end is provided on the body, and the other is provided on the tray. Opposite sides of the male charging end have first electrode sheets and the female charging end has corresponding second electrode sheets. The body of the cleaning system, the body rotates such that the location of the first electrode sheets of the male charging end avoid a problem of poor contact with second electrode sheets of the female charging end.

Abstract: A membrane for use in gas separation may contain a polymer having at least one of either polyimide poly[(naphthalene-1,5-diamine)-alt-(biphenyl-3,3?:4,4?-tetracarboxylic dianhydride)] or poly[isophoronediamine-alt-(biphenyl-3,3?,4,4?-tetracarboxylic anhydride)]. These polyimides were predicted to exhibit above-threshold performance for separating multiple gas pairs for use in industrial applications, such as air separation (O2/N2) and hydrogen separations (H2/CH4, H2/N2), based on a novel graph neural network machine learning model. Performance may be predicted by analyzing polymer properties and structure and comparing against labeled or known performance data for other known polymers. The performance of the polymers for use in gas membranes may then be experimentally verified.

Abstract: The embodiment of the present disclosure provides a cleaning device, which includes a power module, a vacuum cleaner module, and a surface wet cleaner module. The power module includes a power assembly and a motor assembly that are connected to each other. The vacuum cleaner module includes an air suction assembly, a dust collection assembly, and a filter assembly that are sequentially communicated, and the vacuum cleaner module has a first mounting position that is configured to be connected and matched with the power module. The surface wet cleaner module includes a floor brush and a body, and the body has a second mounting position that is configured to be connected and matched with the power module.

Abstract: A semiconductor laser is disclosed. Trim loss region is provided in inner ridge region of surface of transmission layer facing away from substrate, blind hole is provided in trim loss region, and distance from bottom surface of blind hole to surface of second cladding layer facing to substrate is smaller than evanescent wave length in transmission layer. Blind hole can affect optical field characteristics of light transmission in semiconductor laser by affecting evanescent wave. A method for fabricating a semiconductor laser is also provided.

Abstract: A semiconductor laser is disclosed. Trim loss region is provided in inner ridge region of surface of transmission layer facing away from substrate, blind hole is provided in trim loss region, and distance from bottom surface of blind hole to surface of second cladding layer facing to substrate is smaller than evanescent wave length in transmission layer. Blind hole can affect optical field characteristics of light transmission in semiconductor laser by affecting evanescent wave. A method for fabricating a semiconductor laser is also provided.