1) uniform spherome
均匀球体
2) Uniform sphere assemblages
均匀球体集合
3) Regular spherical dynamic model
均匀球体模型
4) spherioidar uniform distribution
球体上均匀分布
5) uniform magnetized sphere
均匀磁化球体
1.
On the basis of the definition of the magnetic field line and the distribution of magnetic field around an uniform magnetized sphere,the article resolves a differential equation and deduces a simple expression of the magnetic field lines,which makes it easy to draw the magnetic lines for an uniform magnetized sphere in geomagnetic research.
基于磁力线定义和均匀磁化球体周围的磁场分布,通过解算微分方程,推导出一个简单的磁力线簇公式,便于在地磁场研究中绘制均匀磁化球体的磁力线。
6) earth's homogeneous model
球体均匀模型
补充资料:空心超导球体(hollowsuperconductingsphere)
空心超导球体(hollowsuperconductingsphere)
设内外半径分别为r1和r2(r1≤r≤r2),壁厚d=r2-r1的第一类超导体的空心球体处于外磁场强度H0中。令ζ=r/δ,Δ=d/δ,δ=δ0/ψ,δ0为大样品弱磁场穿透深度,ψ是有序参量。设H1和M分别是空腔中磁场强度和样品磁矩。按GL理论,徐龙道和Zharkov给出的部分主要结果如下:
`\zeta_1\gt\gt1`和$\Delta\gt\gt1$时,
H1=6H0ζ2ζ1-2e-Δ,
M=-H0r23(1-3δ/r2)/2
所以对厚壁样品,腔内H1≈0,只要H0低于临界磁场,球壳层可视为磁屏蔽物,样品可利用为磁屏蔽体。对$\zeta_1\gt\gt1$和$\Delta\lt\lt1$的情形,则
H1=H0/(1 ζ1Δ/3),
M=-H0r23[1-1/(1 ζ1Δ/3)]/2
可见,若$\zeta_1\Delta\gt\gt1$,则$H_1\lt\ltH_0$或H1≈0。所以,虽然$d\lt\lt\delta$,但磁场仍被屏蔽而很难透入空腔,称ζ1Δ/3为空心超导球体的屏蔽因子。相反,$\zeta_1\Delta\lt\lt1$,则H1≈H0,球壳层几乎不起屏蔽磁场的作用。对M讲,也可作同样讨论。此外,类似于实心小样品,也可求出各种临界磁场HK1,HK,HK2和临界尺寸等。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条