Recognizing facial expressions and emotions is a fundamental and very important skill in the early stages of human social interaction. Humans can observe a person's face and quickly recognize common emotions: anger, jo…

According to Reuters in Japanese Yomiuri Shimbun (The Yomiuri Shimbun) reported that Japanese researchers, legislators and the business community are hoping to take advantage of the deep sea near the coast of Japan in the rare earth metals to produce…

(1) Female singer

The frequency of 1.6-3.6 kHz has the most obvious influence on the brightness of female voices. If this frequency is given a certain improveme…

The PCB etching technique generally refers to etching, which is also called photochemical etching. It refers to removing the protective film of the region to be etched after exposure and plate making, and is exposed to the chemical solution during etching to achieve th…

With the arrival of the smart era, smart audio also ushered in the air, but then it was thrown out. The smart speaker industry is a river and lake, it is a huge "underground river", each player has its gameplay, each A player must also find his own way of living, otherwise he wil…

As a world-class steel power, the metallurgical industry is one of the most important traditional pillar industries in China. Metallurgical automation is playing an increasingly important role as the structural adjustment of steel g…