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Size: 2258
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Size: 2280
Comment: / between node ids
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| Deletions are marked like this. | Additions are marked like this. |
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| OUTPUT :a12,a23,a34,a46: 0.5726 OUTPUT :a13,a36: 0.0181 OUTPUT :a12,a25,a56: 0.0015 OUTPUT :a12,a23,a36: 0.0945 OUTPUT :a14,46: 0.1944 OUTPUT :a13,a34,a46: 0.1189 |
OUTPUT :a1/2,a2/3,a3/4,a4/6: 0.5726 OUTPUT :a1/3,a3/6: 0.0181 OUTPUT :a1/2,a2/5,a5/6: 0.0015 OUTPUT :a1/2,a2/3,a3/6: 0.0945 OUTPUT :a1/4,a4/6: 0.1944 OUTPUT :a1/3,a3/4,a4/6: 0.1189 |
| Line 28: | Line 28: |
| OUTPUT :a12, a23, a34, a46: 0.5726 | OUTPUT :a1/2, a2/3, a3/4, a4/6: 0.5726 |
Write a program SIM (meeting the usual requirements) that implements the Monte Carlo simulation for Stochastic Area Networks in section 2.4.4 of the text.
Input & Output
Your SIM program will take several arguments:
Argument |
Value |
1 |
File of $Uniform(0,1)$ values; use one of these if you like |
2 |
Number of iterations to run ($N$) |
3 |
A text file describing the SAN (details below) |
Your program should produce output such as (compared to the book's table on page 83, we simply displaying the $\pi_k$ and $\hat{p}_a(\pi_k)$ columns):
OUTPUT :a1/2,a2/3,a3/4,a4/6: 0.5726 OUTPUT :a1/3,a3/6: 0.0181 OUTPUT :a1/2,a2/5,a5/6: 0.0015 OUTPUT :a1/2,a2/3,a3/6: 0.0945 OUTPUT :a1/4,a4/6: 0.1944 OUTPUT :a1/3,a3/4,a4/6: 0.1189
Note that the there is no specific order to the output,1 but you must provide an entry for all possible paths. However, the paths should be formatted without any intervening white space, beware:
OUTPUT :a1/2, a2/3, a3/4, a4/6: 0.5726
is no good
The value provided for each path is the critical path point estimate described in the book.
SAN Description Files
Consider the following network:
this would be represented as a simple text file:
1 2 3 2 3 5 1 4 6 1 3 2 4 3 1.5 4 5 6 3 5 4
Per row, the first term is the source node, the second term is the destination node, and the third term is the upper bound for a $Uniform(a,b)$ distribution. For instance, the distribution for the a13 arc should be $Uniform(0,2)$. The largest numbered node in the second column (over all the nodes in the network) may always be considered the terminal node and node 1 will always be the single source node of the network.
Submit Your Work
Log into the course website and submit your project archive file for grading.
Rubric
TBD 
Because we have sort -n -k2 at our disposal (1)