Shanghai Hode Information Technology Co., Ltd.

Gigabase Environmental Consulting (shanghai) Co., Ltd

Le Yin

Xiang Xu

Raefer Keith Wallis

Junqi Chen

Ruipeng Chen

Weixuan Hu

Mengyuan Tang

Xiaoxuan Zhang

This application discloses techniques of playing videos. The techniques comprise caching a video resource of a target onto a plurality of content delivery network (CDN) nodes; establishing a long link with each of a plurality of client computing devices in response to detecting that the plurality of client computing devices access a playback page of the target video; simultaneously sending, via the established long links, signals indicative of a start state of the target video to all of the plurality of client computing devices, wherein each of the plurality of client computing devices simultaneously plays the video resource while separately obtaining the video resource from a corresponding CDN node; simultaneously sending, via the established long links, signals indicative of an end state of the target video to all of the plurality of client computing devices that access the playback page.

Video playback method and apparatus, device, and readable storage medium

The present invention provides a method for comprehensively assessing indoor environmental quality. Pollutant concentration data used in the method is an average value calculated after sampling is performed at a plurality of positions in an indoor space, and is therefore relatively accurate, so that an excessively high or excessively low pollutant concentration at a position is prevented from impairing the accuracy of a measurement result. In the method, concentrations of pollutants are further converted into damage values, the damage values of the pollutants are converted into a total damage value based on a predetermined rule, and an air index is then calculated according to the total damage value, where the calculated air index reflects the impact of various pollutants on air healthiness. Therefore, by using the method for comprehensively assessing indoor environmental quality of the present invention, the measurement is precise, and indoor air healthiness can be comprehensively reflected.

Method for comprehensive evaluation of indoor environmental quality

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Shanghai, China

Le Yin