Utilisateur:Arbg0002/brouillons/réseaux de neurones - Historique des versions

Arbg0002 : /* Global behavior */

2019-04-16T14:15:59Z

Global behavior

2019-04-12T18:08:48Z

Quick example of running BEAM

2019-04-12T18:07:53Z

Quick example of running BEAM

2019-04-12T18:07:41Z

Example: BEAM

2019-04-12T18:07:09Z

Example: BEAM

2019-04-12T18:06:49Z

Example: BEAM

2019-04-12T18:06:18Z

Example: BEAM

2019-04-12T18:05:39Z

Example: BEAM

2019-04-12T17:29:34Z

Activation function

2019-04-12T17:28:38Z

Example: BEAM

@@ Ligne 18 : / Ligne 18 : @@
 == Global behavior ==
-The global behavior of each layer of a neural network is to produce a linear combination of the weights its nodes produced. These weights model the connections between neurons, using an activation function, as detailled in the [[Utilisateur:Arbg0002/brouillons/réseaux_de_neurones#Activation_function|activation function section]]. Then all incoming weights to a node are summed, hence resulting in a linear combination of its inputs. Often, positive contributions are labelled "excitatory" and negative ones, "inhibitory".
+The global behavior of each layer of a neural network is to produce a linear combination of the weights its nodes produced. These weights model the connections between neurons, using an activation function (as detailled in the subsection below). Then all incoming weights to a node are summed, hence resulting in a linear combination of its inputs, through the propagation function (as detailled in the subsection below). Often, positive contributions are labelled "excitatory" and negative ones, "inhibitory".
 === Activation function ===
@@ Ligne 30 : / Ligne 30 : @@
 More on wikipedia: [https://en.wikipedia.org/wiki/Activation_function#Comparison_of_activation_functions] - permanent link: [https://en.wikipedia.org/w/index.php?title=Activation_function&oldid=890334491#Comparison_of_activation_functions]
 == Example: BEAM ==

← Version précédente		Version du 12 avril 2019 à 18:08
Ligne 40 :		Ligne 40 :
	# BEAM (in Visat) > Processing > Water > Meris case 2 [Run]		# BEAM (in Visat) > Processing > Water > Meris case 2 [Run]
	# In SeaDAS > File > Open… *.N1_C2IOP.dim		# In SeaDAS > File > Open… *.N1_C2IOP.dim
		+	# Can compare with level 2 (L2) from the same source

@@ Ligne 33 : / Ligne 33 : @@
 == Example: BEAM ==
-== Quick example of running BEAM ==
+=== Quick example of running BEAM ===
 # Download: [http://www.brockmann-consult.de/cms/web/beam/releases]
 # Get some level 1 (L1) MERIS satellite data:

@@ Ligne 33 : / Ligne 33 : @@
 == Example: BEAM ==
 # Download: [http://www.brockmann-consult.de/cms/web/beam/releases]
 # Get some level 1 (L1) MERIS satellite data:

@@ Ligne 34 : / Ligne 34 : @@
 # Download: [http://www.brockmann-consult.de/cms/web/beam/releases]
 # Get some level 1 (L1) MERIS satellite data:
 ## from [http://oceancolor.gsfc.nasa.gov/cgi/browse.pl] : filename = *.N1
 ## uncompress the .bz2 file
 # BEAM (in Visat) > Processing > Water > Meris case 2 [Run]
 # In SeaDAS > File > Open… *.N1_C2IOP.dim

@@ Ligne 38 : / Ligne 38 : @@
 (Uncompress the .bz2 file!)
-BEAM > Processing > Water > Meris case 2
+BEAM (Visat) > Processing > Water > Meris case 2
 [Run]
 In SeaDAS > File > Open… *.N1_C2IOP.dim

@@ Ligne 27 : / Ligne 27 : @@
 * gaussian function: <math>\phi(v_i)=\exp\left(-\frac{\|v_i-c_i\|^2}{2\sigma^2}\right)</math>
 * multiquadratic function: <math>\phi(v_i)=\sqrt{\|v_i-c_i\|^2 + a^2}</math>
-* inverse multiquadratic function: <math>\phi(v_i)=(\|v_i-c_i\|^2 + a^2)^{-1/2}</math> where <math>c_i</math> is the vector representing the function "center" and <math>a</math> and <math>\sigma</math> are parameters affecting the spread of the radius
+* inverse multiquadratic function: <math>\phi(v_i)=(\|v_i-c_i\|^2 + a^2)^{-1/2}</math> where <math>c_i</math> is the vector representing the function "center" and <math>a</math> and <math>\sigma</math> are parameters controlling the spread of the radius
 More on wikipedia: [https://en.wikipedia.org/wiki/Activation_function#Comparison_of_activation_functions] - permanent link: [https://en.wikipedia.org/w/index.php?title=Activation_function&oldid=890334491#Comparison_of_activation_functions]

@@ Ligne 35 : / Ligne 35 : @@
 Download: [http://www.brockmann-consult.de/cms/web/beam/releases]
-Get level 1 MERIS satellite data from [http://oceancolor.gsfc.nasa.gov/cgi/browse.pl] : filename = *.N1
+Get some level 1 (L1) MERIS satellite data from [http://oceancolor.gsfc.nasa.gov/cgi/browse.pl] : filename = *.N1
 (Uncompress the .bz2 file!)