Port VPM Decompression Algorithm to PHP and then to Dive Computer Post: 302635035

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The Lounge What is on Your Mind? Port VPM Decompression Algorithm to PHP and then to Dive Computer Post 302635035 by Neo on Friday 4th of May 2012 06:50:47 AM

05-04-2012

Administrator

Port VPM Decompression Algorithm to PHP and then to Dive Computer

Hello!

I'm about to embark on a new project to port the VPM (Variable Permability Model) for decompression diving from some old BASIC code (attached, "VPM.txt") to PHP.

Then, I plan to create a plugin for this site where folks can run VPM on the web.

Then, I plan to improve VPM based on some scientific papers (like the one attached, "sdeco.pdf").

And then, if all goes well, port to an "open source" dive computer.

Anyone interested to help in this fun project!?

Quote:

WARNING: Breathing compressed gas underwater, whether with conventional open-circuit scuba or closed-circuit rebreathers, is a potentially dangerous activity that requires specialized training. Breathing gas mixtures other than air underwater and especially using rebreather technology underwater, are activities which require considerable specialized training and certification. No one should ever attempt these activities without professional training. The information and software related to scuba diving, decompression theory and software code in this forum is provided for informational purposes only; and this information does not constitute adequate or proper training!

OSTC_2N_en.pdf (549.7 KB)

VPM_Repetitive_Poster.pdf (599.8 KB)

sdeco.pdf (284.2 KB)

VPM.txt (23.0 KB)

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LEARN ABOUT PHP

fann_get_bit_fail

FANN_GET_BIT_FAIL(3)							 1						      FANN_GET_BIT_FAIL(3)

fann_get_bit_fail - The number of fail bits

SYNOPSIS

       int fann_get_bit_fail (resource	$ann)

DESCRIPTION

	The  number  of  fail  bits; means the number of output neurons which differ more than the bit fail limit (see fann_get_bit_fail_limit(3),
       fann_set_bit_fail_limit(3)). The bits are counted in all of the training data, so this number can be higher than  the  number  of  training
       data.

	This  value  is reset by fann_reset_MSE(3) and updated by all the same functions which also updates the MSE value (e.g. fann_test_data(3),
       fann_train_epoch(3))

PARAMETERS

	      o $ann
		-Neural network resource.

RETURN VALUES

	The number of bits fail, or FALSE on error.

SEE ALSO

       fann_get_MSE(3), fann_reset_MSE(3), fann_test_data(3), fann_train_epoch(3), fann_get_bit_fail_limit(3), fann_set_bit_fail_limit(3).

PHP Documentation Group 												      FANN_GET_BIT_FAIL(3)