Abstract: Provided are an interaction method and apparatus in a live streaming room, a device, and a storage medium. The method comprises: in response to a trigger operation for a preset drawing entry on a live streaming room page, jumping to a graphic drawing page from the live streaming room page, a drawing trajectory set for a preset object being displayed on the graphical drawing page; when a drawing stroke on the graphic drawing page is received, matching the drawing stroke with the drawing trajectory; and if it is determined that the drawing stroke is successfully matched with the drawing trajectory, displaying prompt information about successful participation in a preset activity, the preset activity and the preset drawing entry having a correspondence.

Abstract: A particle detector for rapidly detecting and identifying sub 20 nm particles in Ultra Pure Water (UPW) is disclosed. The detector has a nano particle extractor, a nanoparticle collector, and a tracer particle introducer. The extractor limits the size of droplets output to a predetermined size. The extractor includes (1) a liquid sample inlet, (2) a nebulizer connected to the liquid sample inlet (the nebulizer has a gas supply, and an outlet), (3) an impactor arranged to receive material output from the nebulizer, (4) an evaporator connected to the nebulizer and impactor for providing an aerosol at the extractor outlet, and (5) an aerosol connected to the evaporator. The collector us connected to the extractor and has: (1) a collector inlet connected to the aerosol outlet of the extractor, (2) a vapor condensation growth tube connected to the collector inlet, and (3) a repositionable particle capture plate arranged to receive material output from the growth tube at spatially varying positions.

Abstract: A particle detector for rapidly detecting and identifying sub 20 nm particles in Ultra Pure Water (UPW) is disclosed. The detector has a nano particle extractor, a nanoparticle collector, and a tracer particle introducer. The extractor limits the size of droplets output to a predetermined size. The extractor includes (1) a liquid sample inlet, (2) a nebulizer connected to the liquid sample inlet (the nebulizer has a gas supply, and an outlet), (3) an impactor arranged to receive material output from the nebulizer, (4) an evaporator connected to the nebulizer and impactor for providing an aerosol at the extractor outlet, and (5) an aerosol connected to the evaporator. The collector us connected to the extractor and has: (1) a collector inlet connected to the aerosol outlet of the extractor, (2) a vapor condensation growth tube connected to the collector inlet, and (3) a repositionable particle capture plate arranged to receive material output from the growth tube at spatially varying positions.

Abstract: A device and method are disclosed to apply ESI-based mass spectroscopy to submicrometer and nanometer scale aerosol particles. Unipolar ionization is utilized to charge the particles in order to collect them electrostatically on the tip of a tungsten rod. Subsequently, the species composing the collected particles are dissolved by making a liquid flow over the tungsten rod. This liquid with dissolved aerosol contents is formed into highly charged droplets, which release unfragmented ions for mass spectroscopy, such as time-of-flight mass spectroscopy. The device is configured to operate in a switching mode, wherein aerosol deposition occurs while solvent delivery is turned off and vice versa.