介绍在平面三角网设计中,精度估算问题的计算机实现过程。
In this article the course of using computer to solve the problem of precision estimation about triangulation network is introduced.
运用球面图法及平面三角法,计算了三种组合夹具实例的空间角度及空间点的坐标。
By means of spherical graphics and plane trigonometry, space angle and space point coodinates are calcullated for three sets of combined fixtures as examples.
可以成双增加三角体的数量或改变平面三角的底高比例,使玩具形状和翻转发生变化。
The quantity of the triangle can be improved in pair or the bottom-height ratio of the flat triangle can be changed, so as to change the shape and the reversal of the toy.
So what we'll have here is a trigonal planar case, and you can see that we only have three electrons that are set for bonding, so we'll add three hydrogens, and for b h 3, we'll get a stable structure here.
让电子劲量远离的时候,不用考虑它,这个例子是平面三角形,你可以看到,只有3个电子可以成键。
So if you picture, for example, b h 3, it's going to look like this.
如何使键劲量相互远离,我们会有平面三角形的情形,如果你想象。
So again, if we think about that shape of that carbon atom, it's going to be trigonal planar, 120° it's going to have bond angles of 120 degrees, because we have this set up of having three hybrid orbitals.
如果我们考虑碳原子的形状,它是平面三角形,键角是,因为我们有这三个杂化轨道。
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