Computes the GRU cell forward propagation for 1 time step.
Args x: Input to the GRU cell. h_prev: State input from the previous GRU cell. w_ru: Weight matrix for the reset and update gate. w_c: Weight matrix for the cell connection gate. b_ru: Bias vector for the reset and update gate. b_c: Bias vector for the cell connection gate.
Returns r: Output of the reset gate. u: Output of the update gate. c: Output of the cell connection gate. h: Current state of the GRU cell.
Note on notation of the variables:
Concatenation of a and b is represented by a_b Element-wise dot product of a and b is represented by ab Element-wise dot product is represented by \circ Matrix multiplication is represented by *
Biases are initialized with : `b_ru` - constant_initializer(1.0) `b_c` - constant_initializer(0.0)
This kernel op implements the following mathematical equations:
x_h_prev = [x, h_prev]
[r_bar u_bar] = x_h_prev * w_ru + b_ru
r = sigmoid(r_bar)
u = sigmoid(u_bar)
h_prevr = h_prev \circ r
x_h_prevr = [x h_prevr]
c_bar = x_h_prevr * w_c + b_c
c = tanh(c_bar)
h = (1-u) \circ c + u \circ h_prev
Public Methods
| Output<T> |
c()
|
| static <T extends Number> GRUBlockCell<T> | |
| Output<T> |
h()
|
| Output<T> |
r()
|
| Output<T> |
u()
|
Inherited Methods
Public Methods
public static GRUBlockCell<T> create (Scope scope, Operand<T> x, Operand<T> hPrev, Operand<T> wRu, Operand<T> wC, Operand<T> bRu, Operand<T> bC)
Factory method to create a class wrapping a new GRUBlockCell operation.
Parameters
| scope | current scope |
|---|
Returns
- a new instance of GRUBlockCell