# bounding envelopes

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• 21-Feb-2007, 19:31
heidita
bounding envelopes
Does anybody know the meaning of bounding envelope? Must be something technical. This is the context:

Although an error may vary spacially and temporally (up to here everything ok), usually the only estimate will be a bounding envelope and perhaps an approximate frequency of variation.
• 21-Feb-2007, 21:36
Anglika
Re: bounding envelopes
What does this relate to? It is a scientific term - one definition is this:

The bounding envelope is a probabilistic limit on the surface between the known endpoints. :roll:
• 21-Feb-2007, 22:20
Miner49'er
Re: bounding envelopes
In what science field does this sentence fit?
This is difficult stuff.
I think it could be something like this

We won't be able to measure individual components, the only measurable thing will be changes in the envelope which contains these components and perhaps .........

My best guess.....:-)
• 21-Feb-2007, 22:38
heidita
Re: bounding envelopes
I'm sorry, still no clue. :-(

What is envelope in science?
• 21-Feb-2007, 22:41
heidita
Re: bounding envelopes
Quote:

Originally Posted by Anglika
What does this relate to? It is a scientific term - one definition is this:

The bounding envelope is a probabilistic limit on the surface between the known endpoints. :roll:

Can you simplify the underlined part??:oops:
• 21-Feb-2007, 22:42
Miner49'er
Re: bounding envelopes
An envelope is a container that spans several individual units.
So that only the main dimensions can be seen.
Which makes it easier to introduce it into calculations.

@Queenbu

Dear Mathematician ;-)
HELP !!!!!
• 21-Feb-2007, 22:55
Miner49'er
Re: bounding envelopes
Another example paragraph:

For example, many robotics and automation applications such as collision checking require only the simple bounding envelope of a complex set of nested CAD models. In contrast to approximate graphics rendering, these applications require that the simplified envelope be conservative: that the true CAD model be strictly contained inside it. One conservative bounding envelope is the bounding box.

Do you understand this ?
• 21-Feb-2007, 23:57
queenbu
Re: bounding envelopes
Hello Heidita, Actually this is to do with Physics/Applied Maths not Pure Maths but practically it means that it is similar to when we talk about a mathematical error.We say it's 5,621 plus or minus 0,004 for e.g. There's a range , an upper and lower limit which form the 'bounding envelope'. How it actually relates to what you're doing, that's for you to say.Good luck and goodnight.

P.S. bounding envelope because the upper and lower limits 'enclose' the other value.
• 22-Feb-2007, 00:02
Miner49'er
Re: bounding envelopes
Thx Queenbu:-)
Good night
• 22-Feb-2007, 08:34
Miner49'er
Re: bounding envelopes
So, the idea I had about a bounding envelope differs totally from the mathematical one.

I came across a similar expression in Flemish during my carrier, it came from the people who did complex stress calculations for me.
When I had a totally irregular body that had to be stress tested they asked for an envelope.
This meant a mesh laid over the 3D model. This grid went into their computer model which calculated- and made stress visual in every single area of the body.

Sorry for the nightly disturbance Queenbu. I saw you were still online, so I yelled in despair.;-)
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