IntroductionMuseums use digital resources to provide online services to the public, and a “digital museuming” boom has started. The mechanism of online museum visiting and its impact on willingness to visit on site has become an important issue of widespread concern. Therefore, based on the theory of presence and cognitive-emotional-behavioral theory, this paper introduces perceived value and cultural identity as mediating variables to explore the influence of the digital museuming experience on the willingness to visit on site from the audience’s perspective.MethodQuestionnaires were distributed, using the snowball sampling method, and 429 valid questionnaires were returned.ResultsThe empirical test presents the following results: (1) virtual reality technology multi-dimensionally expands the digital museuming experience; (2) immersion, interaction and available experience promote willingness to visit on-site; (3) hedonic experience in the process of digital museuming cannot be ignored; and (4) perceived value and cultural identity play a mediating role.DiscussionUser experience of visiting virtual museums, perceived value and cultural identity influence user willingness to visit museums in the field, but perceived value does not enhance the user’s cultural identity, maybe due to the inability of the online experience to increase the depth of the experience.

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In order to explore the effect of influent PO43--P concentration on the relationship of phosphorus remove performance and sludge settleability, three sequencing batch reactors (SBRs) operated as anaerobic/aerobic mode were used to treat wastewater with different PO43--P concentrations (same COD), and the organic loading rate (OLR) was changed through adjusting the anaerobic (aerobic) duration. The sludge settleability, nutrients removal, and microorganism species were investigated. The results showed that when the influent PO43--P were 4.3 mg·L−1 and 8.6 mg·L−1, increasing the OLR through decreasing aerobic duration could significantly improve sludge settleability, while decreasing anaerobic duration could not. It was found that increase the OLR could promote the denitrification compete for carbon sources with phosphorus release process by inhibiting the accumulation of NO2--N, leading to the decrease of phosphorus removal ability. When the influent PO43--P was 17.2 mg·L−1, sufficient nitrification was beneficial to enrich denitrifying phosphorus accumulating bacteria (DPAO), and the activities of Thauera and Flavobacterium (DPAO) were stronger. Therefore, increasing influent PO43--P concentration and reducing aerobic duration could help phosphorus accumulating bacteria (PAO) compete with denitrification for COD and enrich DPAO, thus reducing carbon source consumption.

IntroductionChina’s Small-town Youth is an important social class connecting urban and rural development. Its ideological status is closely related to social stability and development so that the study of political identity of small town youth in China has become an important topic.MethodsBased on survey and in-depth interviews, this paper investigates the intermediate mechanism of short videos use on political identity of China’s Small-town Youth.Results and discussionThe study found that the use of short videos by China’s Small-town Youth has a significant positive impact on political identity, and media trust and political trust play a complete mediating role between the use of short videos and political identity. Cultural identity as the main content of China’s political ideology propaganda, cannot affect political trust. This research provides theoretical basis and practical enlightenment for the systematic understanding of the spiritual world and political beliefs of China’s Small-town Youth, and for exploring how to enhance their political identity through short videos use.

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