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In view of the problems of dispersion, repetition, closure and low efficiency in the sharing of large-scale scientific instruments in universities, this paper introduces the involution theory and analyzes the institutional obstacles faced by the sharing of large-scale scientific instruments in practice from the contradiction between supply side and demand side of large-scale scientific instruments, as well as the tendency of management decentralization, purchase duplication, utilization inefficiency, cognitive degradation, support weakening and channel fragmentation. The suggestions such as the market operation mechanism of "Prior to carry and try" and open sharing modes of three types, three modes, three stages and three steps are proposed to improve the sharing of large-scale scientific instruments in universities for decision-making reference. [ABSTRACT FROM AUTHOR]

The paper, choosing the two indexes from hierarchical informational dimension and spatial informational dimension, makes an analysis of the structural differentiation of recreational facility system in Suzhou. The study reveals that firstly the hierarchical structure and spatial structure in the system are of good fractal characteristics. The informational fractal dimension deeply depicts the features of structural differentiation of the recreational system and provides criterion for its optimization. Secondly, overall the system presents gradient tendency from a loose core to compact periphery and the decentralization phenomenon of self-organized ability is more conspicuous. This kind of structural pattern caters to the demand structure, which accurately reflects the spatial development of mature- type recreational facility. This shows the more mature recreational facility system is developed, the more urgently we need to attach great importance to the guidance and upgrade of self- organized optimization ability. Thirdly, informational dimension can make up for the deficiency of simple statistical method and provide the comparative basis of fractal information based on the theory of Recreational Belt Around Metropolis on the basis of behavioral statistical regulation. Lastly comparing with the former studies, we find there exist differences in terms of the informational dimension of recreational facilities and scenic spots, which confirms that travel is only a kind of unusual way of recreation from the perspective of fractal information. Recreation is far more significant than travel in terms of urban and rural social development. [ABSTRACT FROM AUTHOR]