How development will increase the resource of aviation and rocket technology and help recycle industrial waste ...
"Complex chemical reactions" discovered in fresh ice grains from Saturn’s moon Enceladus renews hopes that it may harbor life ...
Scientists found unusual sulfur in moon samples from Apollo 17. The discovery reveals new clues about the Moon’s ancient ...
Abstract: The key to calculating Value at Risk is whether the assumption of return distribution of financial assets is reasonable. In the first place, we introduce the basic theoretical knowledge of ...
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