This paper attempts to focus on the application of the ecological carrying capacity theory and the three‐dimensional state‐space model to th eco‐efficiency evaluation of petrochemical enterprises. This research differs from the existing literature, which focuses on business’ eco‐efficiency from behavioral motivation and strategic perspective. This paper proposes a three‐dimensional state‐space model of ecological efficiency of petrochemical enterprises by adopting a combination of ecological carrying index and state space. This model in a three‐dimensional geometric space takes petrochemical enterprises as a pressurer for natural resources and natural environment. The three axes of space represent the economic status of petrochemical enterprises, the use of resources, and the impact of enterprises on the environment, respectively. It attempts to quantitatively describe economic activities of petrochemical enterprises and the interaction with resources and environment. It focuses on applying the model to calculate the ecological carrying capacity of petrochemical enterprises, verifying the feasibility and applicability of the model in calculating the ecological efficiency of enterprises, and providing theoretical tools for enterprises to make ecological efficiency judgments. The results show that this method can help to find out the problems with resources, economy, and environment during the development of petrochemical enterprises and provide the basis for managers to make strategic decisions of sustainable development.
The rapid development of the Internet technology has boosted the exponential growth of the library collection resources and the reader data of the university libraries, and the university libraries are facing a new development situation. This paper analyzes the current situation of university library in book circulation service, resource construction and data storage information security; then expounds the concept and characteristics of block chain technology, and further explores the innovative application of university library management mode under the perspective of block chain technology, in order to provide new thinking for the intelligent development of university library.
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