然而，尽管Stack Overflow在短期内实现了盈利，长期来看其面临的挑战依然严峻。随着AI技术的不断进步，用户对新技术的讨论逐渐减少，导致平台吸引新用户的能力下降。老用户逐渐向更强大的AI模型转移，平台上关于新技术的讨论也日渐稀少。

A group of scientists from the German research institute Fraunhofer Umsicht claims to have reduced the production costs of redox flow batteries by redesigning one of its main components – the stack.

The ultrasonic sensor is the foundation for a reliable gas flow measurement in today’s power plant emissions stacks. Therefore, optimum adaptation of the sensor for a specific application is critical ...