Surface Magnet Gears with a New Magnet Arrangement and Optimal Shape of Stationary Pole Pieces

In mechanical gear systems, dust, noise, vibration, and tooth wear are generated by frictions among gear teeth, and suppressing friction requires lubrication. Magnetic gears transmit torque by magnetic forces without contact and so avoid contact-related problems. The present paper discusses magnet arrangements and the shape of stationary gear teeth to improve transmission torque in surface magnet type magnetic gear transmission mechanisms.

Ultra-Thin Double-Walled Carbon Nanotubes： A Novel Nanocontainer for Preparing Atomic Wires

有高 graphitization 的双 walled 碳 nanotubes (DWCNT ) 被氢弧分泌物综合了。获得的 DWCNT 有两个的直径的狭窄的分布内部、外部的试管，并且在范围多于 DWCNT 的一半有内部直径 0.61.0 nm。到阳极的从 DWCNT 阴极的地电子排放被测量了，并且 DWCNT 的排放电流密度在大约 4.3 V/m 的一块应用的地到达了 1 A/cm2。在 DWCNT 的高温度的处理以后，长线性的碳链(C 链) 能在极端薄的 DWCNT 内被种形成新奇 C-chain@DWCNT nanostructure，证明这些极端薄的 DWCNT 是为准备有 one-atom-diameter 的真正一个维的 nanostructures 的适当 nanocontainer。