liaron01 2008-8-6 14:02
自已整理的电子专业名词英语解释
这是我花很长时间整理出来的，关于电子行业所有的术语的英语解释，已经搞字母顺序A~Z排列，相当好用。
在第二个地方目前为止肯定找不到的！
Undead_Pheonix 2008-8-6 17:13
支持一下lz。。。
liaron01 2008-8-7 09:46
看 来 发 错 了 地 方 ， 没 有 多 少 人 下 载 这 东 西 ！
自 已 顶 一 下 先 。
给 大 家 发 点 内 容 吧 ！
[size=10pt][b]Angular momentum L [/b][/size][size=10pt]about a point O is defined by [b]L = p [/b][b][i]
[/i][/b][b]r[/b]where [b]p[/b] is the linear momentum and [b]r [/b]is the position vector of the body from O. For a circular orbit around O, the angular momentum is orbital and [i]L[/i] = [i]pr[/i] = [i]mvr[/i]. [color=black]Newton's Second Law in terms of angular momentum becomes,[i] d[/i][b]L[/b][i]/dt[/i] = [b] [/b]where [b][/b] is the applied torque about the same point O. In classical mechanics, in the absence of an external torque, the angular momentum of a body is conserved. In a central force field, [i]i.e[/i]. when the force experienced by a body is always directed to pass through O, that is the force [b]F[/b] is directed along [b]r[/b], [b]L[/b] is also conserved (this is the so-called central field theorem). In quantum mechanics, the orbital angular momentum of an electron in an atom is quantized via [i]L[/i] = ([i]h[/i]/2[i][/i])[[i]l[/i]([i]l[/i] +1)]1/2 where [i]l[/i] is the[b] orbital quantum number[/b] of the electron, [i]l[/i] = 0,1,2,...,([i]n[/i]–1), [i]h[/i] is Planck's constant and [i]n[/i] the [b]principal quantum number[/b].[/color]
[b]Anion[/b] is an atom that has gained negative charge by virtue of accepting an electron or electrons. Usually atoms of nonmetallic elements can gain electrons easily to become anions. Anions become attracted to the [b]anode[/b] (positive terminal) in [b]ionic conduction[/b]. Typical anions are the halogen [b]ions[/b], F-, Cl-, Br-, I-.
[b]Anisotropy (optical)[/b] refers to the fact that the refractive index [i]n[/i] of a [b]crystal[/b] depends on the direction of the electric field in the propagating light beam. The [b]velocity[/b] of light in a crystal depends on the direction of propagation and on the state of its [b]polarization[/b], [i]i.e.[/i] the direction of the electric field. Most noncrystalline materials, such as [b]glasses[/b] and liquids, and all cubic crystals are [i]optically isotropic[/i], that is the refractive index is the same in all directions. For all classes of crystals excluding cubic structures, the refractive index depends on the propagation direction and the state of polarization. The result of optical anisotropy is that, except along certain special directions, any unpolarized light ray entering such a crystal breaks into two different rays with different polarizations and phase velocities. When we view an image through a calcite crystal, an optically anisotropic crystal, we see two images, each constituted by light of different polarization passing through the crystal, whereas there is only one image through an optically isotropic crystal. Optically anisotropic crystals are called [b]birefringent[/b] because an incident light beam may be doubly refracted. Experiments and theories on “most anisotropic crystals”, [i]i.e[/i]. those with the highest degree of anisotropy, show that we can describe light propagation in terms of [i]three[/i] refractive indices, called [b]principal refractive indices[/b] [i]n[/i]1, [i]n[/i]2 and [i]n[/i]3, along three mutually orthogonal directions in the crystal, say [i]x[/i], [i]y[/i] and [i]z[/i] called [i]principal axes[/i]. These indices correspond to the polarization state of the [b]wave[/b] along these axes. Crystals that have three distinct principal indices also have [i]two[/i] optic axes and are called [i]biaxial crystals[/i]. On the other hand, [i]uniaxial crystals[/i] have two of their principal indices the same ([i]n[/i]1 = [i]n[/i]2) and only have [i]one[/i] optic axis. Uniaxial crystals, such as [b]quartz[/b], that have [i]n[/i]3 > [i]n[/i]1 are called [i]positive[/i], and those such as calcite that have [i]n[/i]3 < [i]n[/i]1 are called[i]negative[/i]uniaxial crystals. [/size]
yao38412 2008-8-14 08:06
写得很棒
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