English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The portable air purifier can't uniformly remove the PM 2.5  at each personnel position in a room, which causes the unevenness of PM 2.5  distribution. In order to achieve priority purification of PM 2.5  at the personnel position, experiments and simulations were conducted here to determine the time required for the purifier to reduce the PM 2.5  concentration in a room to 15 μg/m 3  (hereafter referred to as the purification time) in each area of the room at different wind speeds. SPSS was used to conduct regression analysis of the simulated data and determine the contribution rate of each impact factor, and assess the prediction model for the purification time. This prediction model can be used to calculate the purification time of any location in rooms of different sizes. The results show that, there was a nonlinear relationship between the purification time and impact factors, however, when the purifier wind speed is determined, PM 2.5  purification time shows a linear relationship with the remaining impact factors. The contribution rate of the initial PM 2.5  concentration to the purification time was largest. Increasing the wind speed will further increase the contribution rate of the initial PM 2.5  concentration, but reduce the contribution rate of the air supply angle, personnel distance, and personnel angle.

Model prediction of the purification time when PM 2.5 is removed unevenly by an air purifier