Struct TwoCompartmentLIFNeuron 

pub struct TwoCompartmentLIFNeuron {
    pub u_d: f64,
    pub u_s: f64,
    pub s_prev: f64,
    pub beta1: f64,
    pub beta2: f64,
    pub gamma: f64,
    pub v_th: f64,
}

TC-LIF — Zhang et al. (2024) two-compartment spiking neuron.

Discrete map (paper Eqs. 10–12, exact ordering U_D → U_S → S):

U_D[t] = U_D[t-1] + beta1 * U_S[t-1] + I[t] - gamma * S[t-1]
U_S[t] = U_S[t-1] + beta2 * U_D[t]          - v_th  * S[t-1]
S[t]   = Theta(U_S[t] - v_th)

One external input enters the dendrite; both compartments reset softly through the delayed spike S[t-1]. beta1 ∈ (-1, 0) and beta2 ∈ (0, 1) per the paper’s sigmoid parametrisation; the defaults are the published S-MNIST feedforward profile (Table 5) — the paper has dataset-specific profiles and no universal default.

Zhang, Yang, Ma, Wu, Li & Tan, AAAI 38(15):16838, 2024.

Fields

u_d: f64

u_s: f64

s_prev: f64

beta1: f64

beta2: f64

gamma: f64

v_th: f64

Implementations

impl TwoCompartmentLIFNeuron

pub fn new() -> Self

Construct the published S-MNIST feedforward profile.

fn valid(&self) -> bool

pub fn try_step(&mut self, i_ext: f64) -> Result<i32, &'static str>

Advance one step after validating the input and configuration.

Computes the paper map on candidates and commits only on success: a non-finite input, a configuration outside the public bounds, or a non-finite candidate returns Err with the pre-step state preserved exactly.

pub fn step(&mut self, i_ext: f64) -> i32

Fail-closed wrapper for legacy callers: returns 0 on any rejected input without mutating state.

pub fn reset(&mut self)

Restore the dynamic state to zero, preserving parameters.

Trait Implementations

impl Clone for TwoCompartmentLIFNeuron

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TwoCompartmentLIFNeuron

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

Formats the value using the given formatter.

impl Default for TwoCompartmentLIFNeuron

fn default() -> Self

Returns the “default value” for a type.