The raw material for mask production, melt-blown cloth, has increased 20 times in 2 months, polypropylene fiber has increased 4 times...

SCRs and IGBTs are two commonly used power electronic devices, and their roles and applications in circuits are different. The...

Lithium-ion batteries are rechargeable batteries installed in devices such as smartphones and laptops that we use every day. The prototype...

As technology has advanced rapidly, technology, exploration by humans, and advances in aerospace have radically altered our knowledge of our...