# Tag Info

### Why are weight changes in Oja's rule and BCM so different?

No, both look exactly like they should. BCM is to be competitive between the input signals, thus finds that the vertical axis is a better separator for the two points than the horizontal axis. A very ...
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Accepted

### Can someone explain the equivalence between Oja's rule and PCA in a simple way?

The wikipedia article on Hebbsian learning with one node is good. You should be able to grasp the idea of "burning in" the weights at connections of the same polarity and "erasing" ...
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1 vote

### Modeling Homeostatic Regulation with Python: How to Simulate Dynamic Systems

To solve for multiple species you just need to make your model function return a vector where each entry is the derivative of one variable. The example in the documentation shows this for a system of ...
• 485
1 vote

### how to overcome division by zero in the Hodgkin Huxley neuron model

You have AlphaNa = 0.1 * f(0.1*(VoltageDelta-10.0)) where $$f(x)=\frac{x}{1-\exp(-x)}$$ The limit for $x\to 0$ can actually be interpreted as difference quotient,...
• 6,129
1 vote

### Locally evaluate nonlinear dynamic system's stability using eigenvalues

Some brief comments, since this is an old question. Some results on theoretical examination of eigenspectra of random matrices for neural networks: (Rajan & Abbott 2006, Muir & Mrsic-Flogel ...

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