Struct STDP 

pub struct STDP {
    pub a_plus: f64,
    pub a_minus: f64,
    pub tau_plus: f64,
    pub tau_minus: f64,
    pub w_min: f64,
    pub w_max: f64,
    pub multiplicative: bool,
    pub accumulated_dw: f64,
    /* private fields */
}

Spike-Timing Dependent Plasticity (STDP) implementation.

STDP is a biological learning rule where synaptic strength changes depend on the relative timing of pre- and postsynaptic spikes.

Δw = A+ * exp(-Δt/τ+) for Δt > 0 (pre before post, potentiation) Δw = -A- * exp(Δt/τ-) for Δt < 0 (post before pre, depression)

Fields

a_plus: f64

Amplitude of potentiation.

a_minus: f64

Amplitude of depression.

tau_plus: f64

Time constant for potentiation (ms).

tau_minus: f64

Time constant for depression (ms).

w_min: f64

Minimum synaptic weight.

w_max: f64

Maximum synaptic weight.

multiplicative: bool

Whether to use multiplicative updates (vs additive).

accumulated_dw: f64

Accumulated weight change.

Implementations

impl STDP

pub fn new() -> Self

Create new STDP with default parameters.

pub fn with_params( a_plus: f64, a_minus: f64, tau_plus: f64, tau_minus: f64, ) -> Result<Self>

Create STDP with custom parameters.

pub fn multiplicative(self) -> Self

Create STDP with multiplicative updates (weight-dependent).

pub fn pre_spike(&mut self, time: f64, current_weight: f64) -> f64

Register presynaptic spike and calculate weight change.

Arguments

• time - Current time (ms)
• current_weight - Current synaptic weight

Returns

Weight change (Δw)

pub fn post_spike(&mut self, time: f64, current_weight: f64) -> f64

Register postsynaptic spike and calculate weight change.

Arguments

• time - Current time (ms)
• current_weight - Current synaptic weight

Returns

Weight change (Δw)

pub fn apply_update(&mut self, weight: f64) -> f64

Apply accumulated weight change to synaptic weight.

Arguments

• weight - Current synaptic weight

Returns

New synaptic weight

pub fn window(&self, dt: f64) -> f64

Calculate STDP window function for a given time difference.

Arguments

• dt - Time difference (post - pre) in ms

pub fn reset(&mut self)

Reset STDP state.

Trait Implementations

impl Clone for STDP

fn clone(&self) -> STDP

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for STDP

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for STDP

fn default() -> Self

Returns the “default value” for a type.