Search

Xiong'an New Area is a millennium plan and a national event. Water shortage and water pollution have become the main problems which restrict its development. Different from the existing research on Xiong'an strategic development interpretation and resource profile description, this paper combines with scenario analysis and directional distance function models so as to show the water resources utilization efficiency and water saving potential development landscape and path of different scenarios in 2035 for the first time and it is innovatively based on the development of Shenzhen. The research shows that Xiong'an presents a change from low-efficiency zone to high-efficiency zone to high-efficiency zone in the Business as Usual, Starting Process and Construction Completion scenarios from the perspective of utilization efficiency. From the perspective of water saving potential, the reduction of efficiency improvement space and the increase in metatechnology ratios indicate that water saving potential of Xiong'an has been fully explored. Avoiding direct sewage discharge, developing sewage treatment technology actively and optimizing the industrial structure of the Xiong'an New Area are effective ways to promote the utilization efficiency of water resources, which is also an important guarantee for Xiong'an to realize green ecological development. [ABSTRACT FROM AUTHOR]

Based on the Λ-type level system in quantum mechanics, a three-level Λ-type system model with double electric field driven by microwave is established. The differential equation of the detection field is derived by the system density matrix, and is simulated by four order Runge Kutta numerical method. The steady state absorption properties of the system are studied, the interaction field and the atomic energy level system are analyzed. The results show that when the detuning is zero, the detection field could present a slight oscillation, almost no absorption propagation; when the detuning is not zero, the intensity of the detection field decreases sharply with the inerease of detuning, and electromagnetically induced parency occurs. Therefore, the coherence theory is used to explore its physical mechanism. The strength of detection field will greatly decay as the detuning amount is nonzero. The calculation results implements the electromagnetic induction of transparent with the microwave fields and provide a clear information for related research. [ABSTRACT FROM AUTHOR]