ANALEMMA on Instagram: "The operating principle of a liquid hydrogen rocket engine can be divided into several key stages: 1. Storage and supply of fuel and oxidizer: A liquid hydrogen rocket engine uses liquid hydrogen (LH2) as fuel and liquid oxygen (LOX) as an oxidizer. These substances are stored in two separate cryogenic tanks at very low temperatures (hydrogen about -253°C, oxygen about -183°C). Fuel and oxidizer are supplied to the fuel lines using high-pressure pumps. 2. Mixing and feedi

Facts Meme on Instagram: "日本利用压电瓷砖将脚步转化为电能。这些瓷砖捕捉来自你脚步的动能。当你行走时，你的重量和动作会对瓷砖产生压力。瓷砖会轻微弯曲，从而产生机械应力。瓷砖内部的压电材料将这种应力转化为电能。每一步都会产生少量电荷，而数百万步结合在一起就能产生足够的电力来驱动 LED 灯、数字显示屏和传感器。在像涩谷车站这样繁忙的地方，每天大约有240万个脚步为这一系统作出贡献。这些电能可以被储存或立即使用，从而减少对传统电力来源的依赖，并支持可持续的城市基础设施。这种方法将日常运动转化为实用的可再生能源 ＃日本 #知识＃事实 #你知道吗#推荐#科技 #创新 ＃历史 #技术 #实验#热门 日本利用压电瓷砖将脚步转化电能..."

Invention on Instagram: "Shredding an image into smaller pieces is a simple and effective way to understand the idea behind downsampling. When an image is physically cut apart and each small section is viewed on its own, the fine details disappear while the broader shapes and colors remain. This mirrors what happens digitally when an image is reduced in resolution. The computer keeps the essential structure but removes the smaller patterns that the human eye is less likely to notice at a smaller