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This study explores how ethnic minority destination endorsers as social media influencers impact tourists' perception of authenticity and destination image. It sets up a structural model between endorser consistency, tourists' perceived authenticity, destination image, and tourist satisfaction. Using textual analysis, questionnaires, and semi-structured interviews, four studies were conducted to analyse variable relationships and the influence mechanism. Results show that the endorser-destination congruence has a significant effect on tourists' perceived authenticity, while endorser-consumer congruence does not. Existential authenticity affects the destination's affective image and cognitive image, whereas objective authenticity only affects the cognitive image. The moderation effect of endorser attractiveness on endorser-destination congruence and existential authenticity is significant. This study extends tourism authenticity research from on-site to pre-visit authenticity perceived by social media followers. This study provides practical guidance for ethnic destinations to choose local endorsers on social media • Ethnic SMI are more capable in shaping the destination's authenticity than celebrate. • Social media spawn great opportunity for ethnic communities. • The attractiveness of ethnic SMI is critical to destination image. [ABSTRACT FROM AUTHOR]

[Display omitted] • The mechanism of particle adhesion clusters in gas solid fluidized bed was quantitatively investigated. • The competitive effect of different micro-forces between adherent particles was studied. • The effect of different operating factors on particle agglomeration was studied. In this study, the atomic force microscopy (AFM) was used to measure the micro-forces between different particles and study the influence of different operating parameters on the formation of particle clusters in the gas–solid fluidized bed separation process. In this way, the mechanism of liquid bridge formation and fracture can be elucidated, thereby providing a theoretical basis for inhibiting the formation of particle clusters. The results indicated that for relative humidity (RH) < 40%, the extrusion liquid bridge is the dominant factor for the formation of the particle liquid bridge, and the liquid film thickness, h , and liquid film volume, V sq , vary linearly with RH; however, once the RH is > 40%, these relationships become nonlinear. The adhesion force between magnetite powder particles was found to be the largest and that between pulverized coal particles was found to be the smallest, with the mixture of the two particle types being in between. Further, the adhesion between particles increased monotonically with RH, while showing a maximum value with increasing particle separation. A theoretical analysis of the critical fracture distance, D rupture * , of the particle liquid bridge showed that, as the liquid bridge volume, V * , and contact angle, θ , increase, D rupture * gradually increases, but its rate of increase rate. The theoretical analysis was found to be largely consistent with the experimental data, only deviating at low RH. [ABSTRACT FROM AUTHOR]

[Display omitted] • The bed fluidization characteristics in the process of fine coal separation in thermal vibrating fluidized bed. • The effect of separation fine coal on the bed fluidization characteristics. • Dehydration and drying characteristics of fine coal in separation process. By studying the fluidization characteristics of the granular bed in the separation process of fine coal, this paper explores the effect of coal particles on the distribution and evolution of the fluidization behavior of the bed, and analyzes the separation and drying characteristics of fine coal. The results indicated that the stable value of pressure drop curve of bed with medium particles is larger than that of mixed particle bed of medium and coal. Meanwhile, with the increase of the coal particle size, the stable value of pressure drop gradually decreases, as well as the drying rate of lignite increases first and then decreases with the increase of gas velocity, vibration frequency and amplitude. Contrarily, the drying time of fine-grained coal decreases and then increase with the increase of vibration amplitude. Under the conditions of N = 1.4, f = 20 Hz, A = 2 mm, the contact efficiency between the gas–solid phases is good, and the bed pressure fluctuation is stable. After the separation of −6 + 3 mm and −3 + 1 mm fine coal, the ash content of clean coal is 13.4 % and 9.1 % respectively, and the gangue ash reached 43.7 % and 63.5 % respectively. With the increase of gas velocity, vibration frequency and amplitude, the activation energy E a of fine coal drying process decreases first and then increases, and then the activation energy E a in the separation process of fine coal is the lowest under the conditions of N = 1.4, f = 20 Hz, A = 2 mm. [ABSTRACT FROM AUTHOR]