Within the transition process of urban rail transit system, challenges of high energy consumption, increasing carbon emissions, limited economic viability, and intricate risks emerge as significant hurdles. This paper proposes a novel energy utilization framework for urban rail transit system incorporating underground energy storage systems characterized by high resilience and low carbon. Firstly, existing methods are comprehensively reviewed. Then, the integrated framework is introduced, which effectively utilizes and manages diverse renewable energy sources and the available space resources. The viability is demonstrated through a case study by combining Nanjing Metro. Finally, the suggestions research in pivotal areas are summarized.

Physicists at the University of Oxford have successfully simulated how light interacts with empty space—a phenomenon once thought to belong purely to the realm of science fiction.

The simulations recreated a bizarre phenomenon predicted by quantum physics, where light appears to be generated from darkness.

The findings pave the way for real-world laser facilities to experimentally confirm bizarre quantum phenomena.

The results have been published today (5 June) in Communications Physics.

Researchers led by a Rutgers University-New Brunswick astrophysicist, who looked deeply into space at a period known as “Cosmic Noon” about 2 billion to 3 billion years after the Big Bang, have found that a special class of galaxies were busy experiencing their first major burst of star formation.

The discovery is important, scientists said, because it will answer questions about how galaxies grow and evolve, providing key insights into the early stages of galaxy development and the overall history of the universe. 

The core portion of NASA’s Nancy Grace Roman Space Telescope has successfully completed vibration testing, ensuring it will withstand the extreme shaking experienced during launch. Passing this key milestone brings Roman one step closer to helping answer essential questions about the role of dark energy and other cosmic mysteries.