The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Interesting problem?
Replies: 3   Last Post: Jul 18, 2011 3:54 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
William Elliot

Posts: 1,948
Registered: 5/30/08
Re: Interesting problem?
Posted: Jul 17, 2011 4:30 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Sat, 16 Jul 2011, JJ wrote:

> I have a machine, the output of which I can sample at any time. The
> output represents the flow from the machine for the last 24 hours. I
> need to calculate the flow for a given 8 hour period. Is this possible
> and if so how? You can sample the machine as many times as necessary,
> but the fewer the better (so I can actually implement the solution).
> Example: Sample at 9pm represents flow between 9am and 9pm. Sample at
> 5pm represents flow from 5am to 5pm. How could I get the flow for the
> period 9am to 5pm?

Let a = flow from 5 am to 5 pm, b = flow from 9 am to 9 pm.

The flow from 9 am to 5 pm can be approximated as

(2a/3 + 2b/3)/2 = 2(a + b)/3.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.