Mitengo Yamitengo Yapadziko Lapansi (250318)

Msika wa China Spot - Zosowa Zamagetsi Zapadziko Lapansi Zomwe Zimagwira Tsiku ndi Tsiku, Zongotanthauza!

▌ Chithunzi cha Msika

Pr-Nd Aloyi

• Mitundu Yamakono: 543,000 - 547,000
• Mtengo Trend: Chokhazikika ndi kusinthasintha kochepa

Dy-Fe Aloyi

• Mitundu Yamakono: 1,630,000 - 1,650,000
• Mtengo Trend: Kufuna kwamphamvu kumathandizira kukwera

Superconducting Magnets mu MRI: Precision & Innovation (598 chars)
Makanema amakono a MRI amadalira ma coil a niobium-titanium (NbTi) apamwamba oziziritsidwa ndi helium yamadzimadzi kuti apange minda ya 1.5-7T. Kupititsa patsogolo kofunikira:

• Homogeneity ya munda: Makhola onyezimira alondola ≤0.5ppm apatuka pogwiritsa ntchito mapu a nthawi yeniyeni a B₀ (TR=2ms)
• Kuletsa kasamalidwe: Mavavu opumira amitundu yambiri amataya mphamvu ya 15MJ mu 0.3s pakulephera kwa koyilo
• Cryogenics: Ma cryocoolers otsekedwa amakhala ndi 4.2K ndi <10⁻⁶ W/㎡ kutayikira kwamafuta

Zizindikiro zamachitidwe:

• Nb₃Sn zozungulira: Fikirani 21T @ 15K (Brookhaven Lab 2024), ndikupangitsa MRI yapamwamba kwambiri
• Zero-boiloff systems: Sungani 1500L helium kwa zaka 10+ pogwiritsa ntchito maginito firiji (NASA-derived tech)
• Kujambula koyendetsedwa ndi AI: Kuphunzira mozama kumamanganso 0.5mm切片图像 kuchokera ku 50% yaiwisi data (缩短扫描时间42%)

Mlandu wamakampani: Sitima ya Nokia' 7T Terra imachepetsa phokoso lamamvekedwe kufika ku 85dB (vs. 110dB常规MRI) kudzera pakuletsa kugwedezeka, kukulitsa chitonthozo cha odwala.