update Informer

Informer/Informer2020

@@ -0,0 +1 @@
+Subproject commit 29f2a739226a509202a092b464163da81fa74960

config/Informer/METR-LA.yaml

@@ -6,50 +6,47 @@ basic:
   seed: 2023
 
 data:
-  batch_size: 16
+  batch_size: 64
   column_wise: false
   days_per_week: 7
   horizon: 24
   input_dim: 1
   lag: 24
-  label_len: 24
   normalizer: std
-  num_nodes: 207
-  steps_per_day: 288
+  num_nodes: 137
+  steps_per_day: 24
   test_ratio: 0.2
   val_ratio: 0.2
 
 model:
   activation: gelu
   seq_len: 24
-  label_len: 24
-  pred_len: 24
-  d_model: 128
-  d_ff: 2048
-  dropout: 0.1
-  e_layers: 2
-  d_layers: 1
-  n_heads: 8
-  output_attention: False
-  factor: 5
-  attn: prob
-  embed: fixed
-  freq: h
-  distil: true
-  mix: true
+  label_len: 12
+  out_len: 24
   enc_in: 1
   dec_in: 1
   c_out: 1
-
+  d_model: 64
+  d_ff: 512
+  dropout: 0.1
+  e_layers: 1
+  d_layers: 1
+  n_heads: 4
+  factor: 5
+  output_attention: False
+  distil: True
+  mix: True
+  attn: prob
+  embed: fixed
+  freq: h
 
 train:
-  batch_size: 16
+  batch_size: 64
   debug: false
   early_stop: true
   early_stop_patience: 15
-  epochs: 100
+  epochs: 1
   grad_norm: false
-  label_len: 24
   log_step: 1000
   loss_func: mae
   lr_decay: true
@@ -61,6 +58,5 @@ train:
   max_grad_norm: 5
   output_dim: 1
   plot: false
-  pred_len: 24
   real_value: true
   weight_decay: 0

config/Informer/NYCBike-InFlow.yaml

@@ -6,16 +6,15 @@ basic:
   seed: 2023
 
 data:
-  batch_size: 16
+  batch_size: 64
   column_wise: false
   days_per_week: 7
   horizon: 24
   input_dim: 1
   lag: 24
-  label_len: 24
   normalizer: std
-  num_nodes: 128
-  steps_per_day: 48
+  num_nodes: 137
+  steps_per_day: 24
   test_ratio: 0.2
   val_ratio: 0.2
 
@@ -23,33 +22,31 @@ model:
   activation: gelu
   seq_len: 24
   label_len: 12
-  pred_len: 24
-  d_model: 128
-  d_ff: 2048
-  dropout: 0.1
-  e_layers: 2
-  d_layers: 1
-  n_heads: 8
-  output_attention: False
-  factor: 5
-  attn: prob
-  embed: fixed
-  freq: h
-  distil: true
-  mix: true
+  out_len: 24
   enc_in: 1
   dec_in: 1
   c_out: 1
-
+  d_model: 64
+  d_ff: 512
+  dropout: 0.1
+  e_layers: 1
+  d_layers: 1
+  n_heads: 4
+  factor: 5
+  output_attention: False
+  distil: True
+  mix: True
+  attn: prob
+  embed: fixed
+  freq: h
 
 train:
-  batch_size: 16
+  batch_size: 64
   debug: false
   early_stop: true
   early_stop_patience: 15
-  epochs: 100
+  epochs: 1
   grad_norm: false
-  label_len: 24
   log_step: 1000
   loss_func: mae
   lr_decay: true
@@ -61,6 +58,5 @@ train:
   max_grad_norm: 5
   output_dim: 1
   plot: false
-  pred_len: 24
   real_value: true
   weight_decay: 0

config/Informer/NYCBike-OutFlow.yaml

@@ -6,16 +6,15 @@ basic:
   seed: 2023
 
 data:
-  batch_size: 16
+  batch_size: 64
   column_wise: false
   days_per_week: 7
   horizon: 24
   input_dim: 1
   lag: 24
-  label_len: 24
   normalizer: std
-  num_nodes: 128
-  steps_per_day: 48
+  num_nodes: 137
+  steps_per_day: 24
   test_ratio: 0.2
   val_ratio: 0.2
 
@@ -23,33 +22,31 @@ model:
   activation: gelu
   seq_len: 24
   label_len: 12
-  pred_len: 24
-  d_model: 128
-  d_ff: 2048
-  dropout: 0.1
-  e_layers: 2
-  d_layers: 1
-  n_heads: 8
-  output_attention: False
-  factor: 5
-  attn: prob
-  embed: fixed
-  freq: h
-  distil: true
-  mix: true
+  out_len: 24
   enc_in: 1
   dec_in: 1
   c_out: 1
-
+  d_model: 64
+  d_ff: 512
+  dropout: 0.1
+  e_layers: 1
+  d_layers: 1
+  n_heads: 4
+  factor: 5
+  output_attention: False
+  distil: True
+  mix: True
+  attn: prob
+  embed: fixed
+  freq: h
 
 train:
-  batch_size: 16
+  batch_size: 64
   debug: false
   early_stop: true
   early_stop_patience: 15
-  epochs: 100
+  epochs: 1
   grad_norm: false
-  label_len: 24
   log_step: 1000
   loss_func: mae
   lr_decay: true
@@ -61,6 +58,5 @@ train:
   max_grad_norm: 5
   output_dim: 1
   plot: false
-  pred_len: 24
   real_value: true
   weight_decay: 0

config/Informer/SolarEnergy.yaml

@@ -22,23 +22,25 @@ model:
   activation: gelu
   seq_len: 24
   label_len: 12
-  pred_len: 24
-  d_model: 128
-  d_ff: 2048
-  dropout: 0.1
-  e_layers: 2
-  d_layers: 1
-  n_heads: 8
-  output_attention: False
-  factor: 5
-  attn: prob
-  embed: fixed
-  freq: h
-  distil: true
-  mix: true
+  out_len: 24
   enc_in: 1
   dec_in: 1
   c_out: 1
+  d_model: 64
+  d_ff: 512
+  dropout: 0.1
+  e_layers: 1
+  d_layers: 1
+  n_heads: 4
+  factor: 5
+  output_attention: False
+  distil: True
+  mix: True
+  attn: prob
+  embed: fixed
+  freq: h
+
+
 
 
 train:
@@ -48,7 +50,6 @@ train:
   early_stop_patience: 15
   epochs: 100
   grad_norm: false
-  label_len: 24
   log_step: 1000
   loss_func: mae
   lr_decay: true
@@ -60,6 +61,5 @@ train:
   max_grad_norm: 5
   output_dim: 1
   plot: false
-  pred_len: 24
   real_value: true
   weight_decay: 0

model/Informer/Informer_old/attn.py

@@ -0,0 +1,163 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+import numpy as np
+
+from math import sqrt
+from model.Informer.masking import TriangularCausalMask, ProbMask
+
+class FullAttention(nn.Module):
+    def __init__(self, mask_flag=True, factor=5, scale=None, attention_dropout=0.1, output_attention=False):
+        super(FullAttention, self).__init__()
+        self.scale = scale
+        self.mask_flag = mask_flag
+        self.output_attention = output_attention
+        self.dropout = nn.Dropout(attention_dropout)
+        
+    def forward(self, queries, keys, values, attn_mask):
+        B, L, H, E = queries.shape
+        _, S, _, D = values.shape
+        scale = self.scale or 1./sqrt(E)
+
+        scores = torch.einsum("blhe,bshe->bhls", queries, keys)
+        if self.mask_flag:
+            if attn_mask is None:
+                attn_mask = TriangularCausalMask(B, L, device=queries.device)
+
+            scores.masked_fill_(attn_mask.mask, -np.inf)
+
+        A = self.dropout(torch.softmax(scale * scores, dim=-1))
+        V = torch.einsum("bhls,bshd->blhd", A, values)
+        
+        if self.output_attention:
+            return (V.contiguous(), A)
+        else:
+            return (V.contiguous(), None)
+
+class ProbAttention(nn.Module):
+    def __init__(self, mask_flag=True, factor=5, scale=None, attention_dropout=0.1, output_attention=False):
+        super(ProbAttention, self).__init__()
+        self.factor = factor
+        self.scale = scale
+        self.mask_flag = mask_flag
+        self.output_attention = output_attention
+        self.dropout = nn.Dropout(attention_dropout)
+
+    def _prob_QK(self, Q, K, sample_k, n_top): # n_top: c*ln(L_q)
+        # Q [B, H, L, D]
+        B, H, L_K, E = K.shape
+        _, _, L_Q, _ = Q.shape
+
+        # calculate the sampled Q_K
+        K_expand = K.unsqueeze(-3).expand(B, H, L_Q, L_K, E)
+        index_sample = torch.randint(L_K, (L_Q, sample_k)) # real U = U_part(factor*ln(L_k))*L_q
+        K_sample = K_expand[:, :, torch.arange(L_Q).unsqueeze(1), index_sample, :]
+        Q_K_sample = torch.matmul(Q.unsqueeze(-2), K_sample.transpose(-2, -1)).squeeze(-2)
+
+        # find the Top_k query with sparisty measurement
+        M = Q_K_sample.max(-1)[0] - torch.div(Q_K_sample.sum(-1), L_K)
+        M_top = M.topk(n_top, sorted=False)[1]
+
+        # use the reduced Q to calculate Q_K
+        Q_reduce = Q[torch.arange(B)[:, None, None],
+                     torch.arange(H)[None, :, None],
+                     M_top, :] # factor*ln(L_q)
+        Q_K = torch.matmul(Q_reduce, K.transpose(-2, -1)) # factor*ln(L_q)*L_k
+
+        return Q_K, M_top
+
+    def _get_initial_context(self, V, L_Q):
+        B, H, L_V, D = V.shape
+        if not self.mask_flag:
+            # V_sum = V.sum(dim=-2)
+            V_sum = V.mean(dim=-2)
+            contex = V_sum.unsqueeze(-2).expand(B, H, L_Q, V_sum.shape[-1]).clone()
+        else: # use mask
+            assert(L_Q == L_V) # requires that L_Q == L_V, i.e. for self-attention only
+            contex = V.cumsum(dim=-2)
+        return contex
+
+    def _update_context(self, context_in, V, scores, index, L_Q, attn_mask):
+        B, H, L_V, D = V.shape
+
+        if self.mask_flag:
+            attn_mask = ProbMask(B, H, L_Q, index, scores, device=V.device)
+            scores.masked_fill_(attn_mask.mask, -np.inf)
+
+        attn = torch.softmax(scores, dim=-1) # nn.Softmax(dim=-1)(scores)
+
+        context_in[torch.arange(B)[:, None, None],
+                   torch.arange(H)[None, :, None],
+                   index, :] = torch.matmul(attn, V).type_as(context_in)
+        if self.output_attention:
+            attns = (torch.ones([B, H, L_V, L_V])/L_V).type_as(attn).to(attn.device)
+            attns[torch.arange(B)[:, None, None], torch.arange(H)[None, :, None], index, :] = attn
+            return (context_in, attns)
+        else:
+            return (context_in, None)
+
+    def forward(self, queries, keys, values, attn_mask):
+        B, L_Q, H, D = queries.shape
+        _, L_K, _, _ = keys.shape
+
+        queries = queries.transpose(2,1)
+        keys = keys.transpose(2,1)
+        values = values.transpose(2,1)
+
+        U_part = self.factor * np.ceil(np.log(L_K)).astype('int').item() # c*ln(L_k)
+        u = self.factor * np.ceil(np.log(L_Q)).astype('int').item() # c*ln(L_q) 
+
+        U_part = U_part if U_part<L_K else L_K
+        u = u if u<L_Q else L_Q
+        
+        scores_top, index = self._prob_QK(queries, keys, sample_k=U_part, n_top=u) 
+
+        # add scale factor
+        scale = self.scale or 1./sqrt(D)
+        if scale is not None:
+            scores_top = scores_top * scale
+        # get the context
+        context = self._get_initial_context(values, L_Q)
+        # update the context with selected top_k queries
+        context, attn = self._update_context(context, values, scores_top, index, L_Q, attn_mask)
+        
+        return context.transpose(2,1).contiguous(), attn
+
+
+class AttentionLayer(nn.Module):
+    def __init__(self, attention, d_model, n_heads, 
+                 d_keys=None, d_values=None, mix=False):
+        super(AttentionLayer, self).__init__()
+
+        d_keys = d_keys or (d_model//n_heads)
+        d_values = d_values or (d_model//n_heads)
+
+        self.inner_attention = attention
+        self.query_projection = nn.Linear(d_model, d_keys * n_heads)
+        self.key_projection = nn.Linear(d_model, d_keys * n_heads)
+        self.value_projection = nn.Linear(d_model, d_values * n_heads)
+        self.out_projection = nn.Linear(d_values * n_heads, d_model)
+        self.n_heads = n_heads
+        self.mix = mix
+
+    def forward(self, queries, keys, values, attn_mask):
+        B, L, _ = queries.shape
+        _, S, _ = keys.shape
+        H = self.n_heads
+
+        queries = self.query_projection(queries).view(B, L, H, -1)
+        keys = self.key_projection(keys).view(B, S, H, -1)
+        values = self.value_projection(values).view(B, S, H, -1)
+
+        out, attn = self.inner_attention(
+            queries,
+            keys,
+            values,
+            attn_mask
+        )
+        if self.mix:
+            out = out.transpose(2,1).contiguous()
+        out = out.view(B, L, -1)
+
+        return self.out_projection(out), attn

model/Informer/Informer_old/decoder.py

@@ -0,0 +1,51 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+class DecoderLayer(nn.Module):
+    def __init__(self, self_attention, cross_attention, d_model, d_ff=None,
+                 dropout=0.1, activation="relu"):
+        super(DecoderLayer, self).__init__()
+        d_ff = d_ff or 4*d_model
+        self.self_attention = self_attention
+        self.cross_attention = cross_attention
+        self.conv1 = nn.Conv1d(in_channels=d_model, out_channels=d_ff, kernel_size=1)
+        self.conv2 = nn.Conv1d(in_channels=d_ff, out_channels=d_model, kernel_size=1)
+        self.norm1 = nn.LayerNorm(d_model)
+        self.norm2 = nn.LayerNorm(d_model)
+        self.norm3 = nn.LayerNorm(d_model)
+        self.dropout = nn.Dropout(dropout)
+        self.activation = F.relu if activation == "relu" else F.gelu
+
+    def forward(self, x, cross, x_mask=None, cross_mask=None):
+        x = x + self.dropout(self.self_attention(
+            x, x, x,
+            attn_mask=x_mask
+        )[0])
+        x = self.norm1(x)
+
+        x = x + self.dropout(self.cross_attention(
+            x, cross, cross,
+            attn_mask=cross_mask
+        )[0])
+
+        y = x = self.norm2(x)
+        y = self.dropout(self.activation(self.conv1(y.transpose(-1,1))))
+        y = self.dropout(self.conv2(y).transpose(-1,1))
+
+        return self.norm3(x+y)
+
+class Decoder(nn.Module):
+    def __init__(self, layers, norm_layer=None):
+        super(Decoder, self).__init__()
+        self.layers = nn.ModuleList(layers)
+        self.norm = norm_layer
+
+    def forward(self, x, cross, x_mask=None, cross_mask=None):
+        for layer in self.layers:
+            x = layer(x, cross, x_mask=x_mask, cross_mask=cross_mask)
+
+        if self.norm is not None:
+            x = self.norm(x)
+
+        return x

model/Informer/Informer_old/embed.py

@@ -0,0 +1,36 @@
+# model/InformerOnlyX/embed.py
+import torch
+import torch.nn as nn
+import math
+
+
+class PositionalEmbedding(nn.Module):
+    def __init__(self, d_model, max_len=5000):
+        super().__init__()
+        pe = torch.zeros(max_len, d_model)
+        position = torch.arange(0, max_len).unsqueeze(1).float()
+        div_term = torch.exp(
+            torch.arange(0, d_model, 2).float() * (-math.log(10000.0) / d_model)
+        )
+        pe[:, 0::2] = torch.sin(position * div_term)
+        pe[:, 1::2] = torch.cos(position * div_term)
+        self.register_buffer("pe", pe.unsqueeze(0))  # [1, L, D]
+
+    def forward(self, x):
+        return self.pe[:, :x.size(1)]
+
+
+class DataEmbedding(nn.Module):
+    """
+    Informer-style embedding without time covariates
+    """
+
+    def __init__(self, c_in, d_model, dropout):
+        super().__init__()
+        self.value_embedding = nn.Linear(c_in, d_model)
+        self.position_embedding = PositionalEmbedding(d_model)
+        self.dropout = nn.Dropout(dropout)
+
+    def forward(self, x):
+        x = self.value_embedding(x) + self.position_embedding(x)
+        return self.dropout(x)

model/Informer/Informer_old/encoder.py

@@ -0,0 +1,98 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+class ConvLayer(nn.Module):
+    def __init__(self, c_in):
+        super(ConvLayer, self).__init__()
+        padding = 1 if torch.__version__>='1.5.0' else 2
+        self.downConv = nn.Conv1d(in_channels=c_in,
+                                  out_channels=c_in,
+                                  kernel_size=3,
+                                  padding=padding,
+                                  padding_mode='circular')
+        self.norm = nn.BatchNorm1d(c_in)
+        self.activation = nn.ELU()
+        self.maxPool = nn.MaxPool1d(kernel_size=3, stride=2, padding=1)
+
+    def forward(self, x):
+        x = self.downConv(x.permute(0, 2, 1))
+        x = self.norm(x)
+        x = self.activation(x)
+        x = self.maxPool(x)
+        x = x.transpose(1,2)
+        return x
+
+class EncoderLayer(nn.Module):
+    def __init__(self, attention, d_model, d_ff=None, dropout=0.1, activation="relu"):
+        super(EncoderLayer, self).__init__()
+        d_ff = d_ff or 4*d_model
+        self.attention = attention
+        self.conv1 = nn.Conv1d(in_channels=d_model, out_channels=d_ff, kernel_size=1)
+        self.conv2 = nn.Conv1d(in_channels=d_ff, out_channels=d_model, kernel_size=1)
+        self.norm1 = nn.LayerNorm(d_model)
+        self.norm2 = nn.LayerNorm(d_model)
+        self.dropout = nn.Dropout(dropout)
+        self.activation = F.relu if activation == "relu" else F.gelu
+
+    def forward(self, x, attn_mask=None):
+        # x [B, L, D]
+        # x = x + self.dropout(self.attention(
+        #     x, x, x,
+        #     attn_mask = attn_mask
+        # ))
+        new_x, attn = self.attention(
+            x, x, x,
+            attn_mask = attn_mask
+        )
+        x = x + self.dropout(new_x)
+
+        y = x = self.norm1(x)
+        y = self.dropout(self.activation(self.conv1(y.transpose(-1,1))))
+        y = self.dropout(self.conv2(y).transpose(-1,1))
+
+        return self.norm2(x+y), attn
+
+class Encoder(nn.Module):
+    def __init__(self, attn_layers, conv_layers=None, norm_layer=None):
+        super(Encoder, self).__init__()
+        self.attn_layers = nn.ModuleList(attn_layers)
+        self.conv_layers = nn.ModuleList(conv_layers) if conv_layers is not None else None
+        self.norm = norm_layer
+
+    def forward(self, x, attn_mask=None):
+        # x [B, L, D]
+        attns = []
+        if self.conv_layers is not None:
+            for attn_layer, conv_layer in zip(self.attn_layers, self.conv_layers):
+                x, attn = attn_layer(x, attn_mask=attn_mask)
+                x = conv_layer(x)
+                attns.append(attn)
+            x, attn = self.attn_layers[-1](x, attn_mask=attn_mask)
+            attns.append(attn)
+        else:
+            for attn_layer in self.attn_layers:
+                x, attn = attn_layer(x, attn_mask=attn_mask)
+                attns.append(attn)
+
+        if self.norm is not None:
+            x = self.norm(x)
+
+        return x, attns
+
+class EncoderStack(nn.Module):
+    def __init__(self, encoders, inp_lens):
+        super(EncoderStack, self).__init__()
+        self.encoders = nn.ModuleList(encoders)
+        self.inp_lens = inp_lens
+
+    def forward(self, x, attn_mask=None):
+        # x [B, L, D]
+        x_stack = []; attns = []
+        for i_len, encoder in zip(self.inp_lens, self.encoders):
+            inp_len = x.shape[1]//(2**i_len)
+            x_s, attn = encoder(x[:, -inp_len:, :])
+            x_stack.append(x_s); attns.append(attn)
+        x_stack = torch.cat(x_stack, -2)
+        
+        return x_stack, attns

model/Informer/Informer_old/head.py

@@ -0,0 +1,25 @@
+# model/Informer/head.py
+import torch
+import torch.nn as nn
+
+
+class TemporalProjectionHead(nn.Module):
+    """
+    Project along temporal dimension
+    [B, L, D] -> [B, pred_len, C]
+    """
+
+    def __init__(self, d_model, pred_len, c_out):
+        super().__init__()
+        self.temporal_proj = nn.Linear(1, pred_len)
+        self.channel_proj = nn.Linear(d_model, c_out)
+
+    def forward(self, x):
+        # x: [B, L, D]
+        # Average over the sequence dimension and then project
+        x = x.mean(dim=1, keepdim=True)  # [B, 1, D]
+        x = x.transpose(1, 2)            # [B, D, 1]
+        x = self.temporal_proj(x)        # [B, D, pred_len]
+        x = x.transpose(1, 2)            # [B, pred_len, D]
+        x = self.channel_proj(x)         # [B, pred_len, C]
+        return x

model/Informer/Informer_old/masking.py

@@ -0,0 +1,24 @@
+import torch
+
+class TriangularCausalMask():
+    def __init__(self, B, L, device="cpu"):
+        mask_shape = [B, 1, L, L]
+        with torch.no_grad():
+            self._mask = torch.triu(torch.ones(mask_shape, dtype=torch.bool), diagonal=1).to(device)
+
+    @property
+    def mask(self):
+        return self._mask
+
+class ProbMask():
+    def __init__(self, B, H, L, index, scores, device="cpu"):
+        _mask = torch.ones(L, scores.shape[-1], dtype=torch.bool).to(device).triu(1)
+        _mask_ex = _mask[None, None, :].expand(B, H, L, scores.shape[-1])
+        indicator = _mask_ex[torch.arange(B)[:, None, None],
+                             torch.arange(H)[None, :, None],
+                             index, :].to(device)
+        self._mask = indicator.view(scores.shape).to(device)
+    
+    @property
+    def mask(self):
+        return self._mask

model/Informer/Informer_old/model.py

@@ -0,0 +1,48 @@
+import torch
+import torch.nn as nn
+
+from model.Informer.encoder import Encoder, EncoderLayer, ConvLayer
+from model.Informer.attn import FullAttention, ProbAttention, AttentionLayer
+from model.Informer.embed import DataEmbedding
+from model.Informer.head import TemporalProjectionHead
+
+
+class InformerEncoder(nn.Module):
+
+    def __init__(self, configs):
+        super().__init__()
+
+        self.seq_len = configs["seq_len"]
+        self.pred_len = configs["pred_len"]
+
+        Attn = ProbAttention if configs["attn"] == "prob" else FullAttention
+
+        # Embedding
+        self.embedding = DataEmbedding(configs["enc_in"], configs["d_model"], configs["dropout"])
+
+        # Encoder(Attn-Conv-Norm)
+        self.encoder = Encoder(
+            [EncoderLayer(
+                # Attn
+                AttentionLayer(Attn(False, configs["factor"], configs["dropout"], False),
+                             configs["d_model"], configs["n_heads"], False),
+                configs["d_model"], configs["d_ff"], configs["dropout"], configs["activation"])
+                for _ in range(configs["e_layers"])],
+             # Conv
+            [ConvLayer(configs["d_model"]) for _ in range(configs["e_layers"] - 1)]
+            # Norm
+            if configs.get("distil") else None, norm_layer=nn.LayerNorm(configs["d_model"])
+        )
+
+        # Forecast Head
+        self.head = TemporalProjectionHead(
+            d_model=configs["d_model"],
+            pred_len=configs["pred_len"],
+            c_out=configs["c_out"],
+        )
+
+    def forward(self, x_enc):
+        x = self.embedding(x_enc)
+        x, _ = self.encoder(x)
+        out = self.head(x)
+        return out[:, -self.pred_len :, :]

model/Informer/embed.py

@@ -1,36 +1,111 @@
-# model/InformerOnlyX/embed.py
+# model/Informer/embed.py
 import torch
 import torch.nn as nn
 import math
 
+class TokenEmbedding(nn.Module):
+    def __init__(self, c_in, d_model):
+        super(TokenEmbedding, self).__init__()
+        padding = 1 if torch.__version__>='1.5.0' else 2
+        self.tokenConv = nn.Conv1d(in_channels=c_in, out_channels=d_model, 
+                                    kernel_size=3, padding=padding, padding_mode='circular')
+        for m in self.modules():
+            if isinstance(m, nn.Conv1d):
+                nn.init.kaiming_normal_(m.weight,mode='fan_in',nonlinearity='leaky_relu')
+
+    def forward(self, x):
+        x = self.tokenConv(x.permute(0, 2, 1)).transpose(1,2)
+        return x
 
 class PositionalEmbedding(nn.Module):
     def __init__(self, d_model, max_len=5000):
-        super().__init__()
-        pe = torch.zeros(max_len, d_model)
-        position = torch.arange(0, max_len).unsqueeze(1).float()
-        div_term = torch.exp(
-            torch.arange(0, d_model, 2).float() * (-math.log(10000.0) / d_model)
-        )
+        super(PositionalEmbedding, self).__init__()
+        # Compute the positional encodings once in log space.
+        pe = torch.zeros(max_len, d_model).float()
+        pe.require_grad = False
+
+        position = torch.arange(0, max_len).float().unsqueeze(1)
+        div_term = (torch.arange(0, d_model, 2).float() * -(math.log(10000.0) / d_model)).exp()
+
         pe[:, 0::2] = torch.sin(position * div_term)
         pe[:, 1::2] = torch.cos(position * div_term)
-        self.register_buffer("pe", pe.unsqueeze(0))  # [1, L, D]
+
+        pe = pe.unsqueeze(0)
+        self.register_buffer('pe', pe)
 
     def forward(self, x):
         return self.pe[:, :x.size(1)]
 
+class FixedEmbedding(nn.Module):
+    def __init__(self, c_in, d_model):
+        super(FixedEmbedding, self).__init__()
 
-class DataEmbedding(nn.Module):
-    """
-    Informer-style embedding without time covariates
-    """
+        w = torch.zeros(c_in, d_model).float()
+        w.require_grad = False
 
-    def __init__(self, c_in, d_model, dropout):
-        super().__init__()
-        self.value_embedding = nn.Linear(c_in, d_model)
-        self.position_embedding = PositionalEmbedding(d_model)
-        self.dropout = nn.Dropout(dropout)
+        position = torch.arange(0, c_in).float().unsqueeze(1)
+        div_term = (torch.arange(0, d_model, 2).float() * -(math.log(10000.0) / d_model)).exp()
+
+        w[:, 0::2] = torch.sin(position * div_term)
+        w[:, 1::2] = torch.cos(position * div_term)
+
+        self.emb = nn.Embedding(c_in, d_model)
+        self.emb.weight = nn.Parameter(w, requires_grad=False)
 
     def forward(self, x):
+        return self.emb(x).detach()
+
+class TemporalEmbedding(nn.Module):
+    def __init__(self, d_model, embed_type='fixed', freq='h'):
+        super(TemporalEmbedding, self).__init__()
+
+        minute_size = 4; hour_size = 24
+        weekday_size = 7; day_size = 32; month_size = 13
+
+        Embed = FixedEmbedding if embed_type=='fixed' else nn.Embedding
+        if freq=='t':
+            self.minute_embed = Embed(minute_size, d_model)
+        self.hour_embed = Embed(hour_size, d_model)
+        self.weekday_embed = Embed(weekday_size, d_model)
+        self.day_embed = Embed(day_size, d_model)
+        self.month_embed = Embed(month_size, d_model)
+    
+    def forward(self, x):
+        x = x.long()
+        
+        minute_x = self.minute_embed(x[:,:,4]) if hasattr(self, 'minute_embed') else 0.
+        hour_x = self.hour_embed(x[:,:,3])
+        weekday_x = self.weekday_embed(x[:,:,2])
+        day_x = self.day_embed(x[:,:,1])
+        month_x = self.month_embed(x[:,:,0])
+        
+        return hour_x + weekday_x + day_x + month_x + minute_x
+
+class TimeFeatureEmbedding(nn.Module):
+    def __init__(self, d_model, embed_type='timeF', freq='h'):
+        super(TimeFeatureEmbedding, self).__init__()
+
+        freq_map = {'h':4, 't':5, 's':6, 'm':1, 'a':1, 'w':2, 'd':3, 'b':3}
+        d_inp = freq_map[freq]
+        self.embed = nn.Linear(d_inp, d_model)
+    
+    def forward(self, x):
+        return self.embed(x)
+
+class DataEmbedding(nn.Module):
+    def __init__(self, c_in, d_model, embed_type='fixed', freq='h', dropout=0.1):
+        super(DataEmbedding, self).__init__()
+
+        self.value_embedding = TokenEmbedding(c_in=c_in, d_model=d_model)
+        self.position_embedding = PositionalEmbedding(d_model=d_model)
+        self.temporal_embedding = TemporalEmbedding(d_model=d_model, embed_type=embed_type, freq=freq) if embed_type!='timeF' else TimeFeatureEmbedding(d_model=d_model, embed_type=embed_type, freq=freq)
+
+        self.dropout = nn.Dropout(p=dropout)
+
+    def forward(self, x, x_mark):
+        if x_mark is None:
             x = self.value_embedding(x) + self.position_embedding(x)
+        else:
+            x = self.value_embedding(x) + self.position_embedding(x) + self.temporal_embedding(x_mark)
+        
         return self.dropout(x)

model/Informer/model.py

@@ -1,48 +1,209 @@
 import torch
 import torch.nn as nn
+import torch.nn.functional as F
 
-from model.Informer.encoder import Encoder, EncoderLayer, ConvLayer
+from model.Informer.encoder import Encoder, EncoderLayer, ConvLayer, EncoderStack
+from model.Informer.decoder import Decoder, DecoderLayer
 from model.Informer.attn import FullAttention, ProbAttention, AttentionLayer
 from model.Informer.embed import DataEmbedding
-from model.Informer.head import TemporalProjectionHead
-
-
-class InformerEncoder(nn.Module):
+from model.Informer.masking import TriangularCausalMask, ProbMask
 
+class Informer(nn.Module):
     def __init__(self, configs):
-        super().__init__()
+        super(Informer, self).__init__()
+        # 从configs中提取参数
+        self.enc_in = configs.get("enc_in", 1)
+        self.dec_in = configs.get("dec_in", 1)
+        self.c_out = configs.get("c_out", 1)
+        self.seq_len = configs.get("seq_len", 96)
+        self.label_len = configs.get("label_len", 48)
+        self.out_len = configs.get("out_len", 24)
+        self.factor = configs.get("factor", 5)
+        self.d_model = configs.get("d_model", 512)
+        self.n_heads = configs.get("n_heads", 8)
+        self.e_layers = configs.get("e_layers", 3)
+        self.d_layers = configs.get("d_layers", 2)
+        self.d_ff = configs.get("d_ff", 512)
+        self.dropout = configs.get("dropout", 0.0)
+        self.attn = configs.get("attn", "prob")
+        self.embed = configs.get("embed", "fixed")
+        self.freq = configs.get("freq", "h")
+        self.activation = configs.get("activation", "gelu")
+        self.output_attention = configs.get("output_attention", False)
+        self.distil = configs.get("distil", True)
+        self.mix = configs.get("mix", True)
+        self.device = configs.get("device", torch.device('cuda:0'))
         
-        self.seq_len = configs["seq_len"]
-        self.pred_len = configs["pred_len"]
+        self.pred_len = self.out_len
         
-        Attn = ProbAttention if configs["attn"] == "prob" else FullAttention
+        # 编码层
+        self.enc_embedding = DataEmbedding(self.enc_in, self.d_model, self.embed, self.freq, self.dropout)
+        self.dec_embedding = DataEmbedding(self.dec_in, self.d_model, self.embed, self.freq, self.dropout)
         
-        # Embedding
-        self.embedding = DataEmbedding(configs["enc_in"], configs["d_model"], configs["dropout"])
+        # 注意力层
+        Attn = ProbAttention if self.attn == 'prob' else FullAttention
         
-        # Encoder(Attn-Conv-Norm)
+        # 编码器
         self.encoder = Encoder(
-            [EncoderLayer(
-                # Attn
-                AttentionLayer(Attn(False, configs["factor"], configs["dropout"], False),
-                             configs["d_model"], configs["n_heads"], False),
-                configs["d_model"], configs["d_ff"], configs["dropout"], configs["activation"])
-                for _ in range(configs["e_layers"])],
-             # Conv
-            [ConvLayer(configs["d_model"]) for _ in range(configs["e_layers"] - 1)]
-            # Norm
-            if configs.get("distil") else None, norm_layer=nn.LayerNorm(configs["d_model"])
+            [
+                EncoderLayer(
+                    AttentionLayer(Attn(False, self.factor, attention_dropout=self.dropout, output_attention=self.output_attention), 
+                                self.d_model, self.n_heads, mix=False),
+                    self.d_model,
+                    self.d_ff,
+                    dropout=self.dropout,
+                    activation=self.activation
+                ) for l in range(self.e_layers)
+            ],
+            [
+                ConvLayer(
+                    self.d_model
+                ) for l in range(self.e_layers - 1)
+            ] if self.distil else None,
+            norm_layer=torch.nn.LayerNorm(self.d_model)
         )
         
-        # Forecast Head
-        self.head = TemporalProjectionHead(
-            d_model=configs["d_model"],
-            pred_len=configs["pred_len"],
-            c_out=configs["c_out"],
+        # 解码器
+        self.decoder = Decoder(
+            [
+                DecoderLayer(
+                    AttentionLayer(Attn(True, self.factor, attention_dropout=self.dropout, output_attention=False), 
+                                self.d_model, self.n_heads, mix=self.mix),
+                    AttentionLayer(FullAttention(False, self.factor, attention_dropout=self.dropout, output_attention=False), 
+                                self.d_model, self.n_heads, mix=False),
+                    self.d_model,
+                    self.d_ff,
+                    dropout=self.dropout,
+                    activation=self.activation,
+                )
+                for l in range(self.d_layers)
+            ],
+            norm_layer=torch.nn.LayerNorm(self.d_model)
         )
         
-    def forward(self, x_enc):
-        x = self.embedding(x_enc)
-        x, _ = self.encoder(x)
-        out = self.head(x)
-        return out[:, -self.pred_len :, :]
+        # 投影层
+        self.projection = nn.Linear(self.d_model, self.c_out, bias=True)
+        
+    def forward(self, x_enc, x_mark_enc=None, x_dec=None, x_mark_dec=None,
+                enc_self_mask=None, dec_self_mask=None, dec_enc_mask=None):
+        # 如果没有提供x_dec和x_mark_dec，则根据x_enc和label_len生成
+        if x_dec is None:
+            x_dec = torch.cat([x_enc[:, -self.label_len:, :], torch.zeros_like(x_enc[:, :self.pred_len, :])], dim=1)
+        if x_mark_dec is None and x_mark_enc is not None:
+            x_mark_dec = torch.cat([x_mark_enc[:, -self.label_len:, :], torch.zeros_like(x_mark_enc[:, :self.pred_len, :])], dim=1)
+        
+        # 编码
+        enc_out = self.enc_embedding(x_enc, x_mark_enc)
+        enc_out, attns = self.encoder(enc_out, attn_mask=enc_self_mask)
+        
+        # 解码
+        dec_out = self.dec_embedding(x_dec, x_mark_dec)
+        dec_out = self.decoder(dec_out, enc_out, x_mask=dec_self_mask, cross_mask=dec_enc_mask)
+        dec_out = self.projection(dec_out)
+        
+        if self.output_attention:
+            return dec_out[:, -self.pred_len:, :], attns
+        else:
+            return dec_out[:, -self.pred_len:, :] # [B, L, D]
+
+
+class InformerStack(nn.Module):
+    def __init__(self, configs):
+        super(InformerStack, self).__init__()
+        # 从configs中提取参数
+        self.enc_in = configs.get("enc_in", 1)
+        self.dec_in = configs.get("dec_in", 1)
+        self.c_out = configs.get("c_out", 1)
+        self.seq_len = configs.get("seq_len", 96)
+        self.label_len = configs.get("label_len", 48)
+        self.out_len = configs.get("out_len", 24)
+        self.factor = configs.get("factor", 5)
+        self.d_model = configs.get("d_model", 512)
+        self.n_heads = configs.get("n_heads", 8)
+        self.e_layers = configs.get("e_layers", [3, 2, 1])
+        self.d_layers = configs.get("d_layers", 2)
+        self.d_ff = configs.get("d_ff", 512)
+        self.dropout = configs.get("dropout", 0.0)
+        self.attn = configs.get("attn", "prob")
+        self.embed = configs.get("embed", "fixed")
+        self.freq = configs.get("freq", "h")
+        self.activation = configs.get("activation", "gelu")
+        self.output_attention = configs.get("output_attention", False)
+        self.distil = configs.get("distil", True)
+        self.mix = configs.get("mix", True)
+        self.device = configs.get("device", torch.device('cuda:0'))
+        
+        self.pred_len = self.out_len
+        
+        # 编码层
+        self.enc_embedding = DataEmbedding(self.enc_in, self.d_model, self.embed, self.freq, self.dropout)
+        self.dec_embedding = DataEmbedding(self.dec_in, self.d_model, self.embed, self.freq, self.dropout)
+        
+        # 注意力层
+        Attn = ProbAttention if self.attn == 'prob' else FullAttention
+        
+        # 编码器栈
+        inp_lens = list(range(len(self.e_layers))) # [0,1,2,...] you can customize here
+        encoders = [
+            Encoder(
+                [
+                    EncoderLayer(
+                        AttentionLayer(Attn(False, self.factor, attention_dropout=self.dropout, output_attention=self.output_attention), 
+                                    self.d_model, self.n_heads, mix=False),
+                        self.d_model,
+                        self.d_ff,
+                        dropout=self.dropout,
+                        activation=self.activation
+                    ) for l in range(el)
+                ],
+                [
+                    ConvLayer(
+                        self.d_model
+                    ) for l in range(el-1)
+                ] if self.distil else None,
+                norm_layer=torch.nn.LayerNorm(self.d_model)
+            ) for el in self.e_layers]
+        self.encoder = EncoderStack(encoders, inp_lens)
+        
+        # 解码器
+        self.decoder = Decoder(
+            [
+                DecoderLayer(
+                    AttentionLayer(Attn(True, self.factor, attention_dropout=self.dropout, output_attention=False), 
+                                self.d_model, self.n_heads, mix=self.mix),
+                    AttentionLayer(FullAttention(False, self.factor, attention_dropout=self.dropout, output_attention=False), 
+                                self.d_model, self.n_heads, mix=False),
+                    self.d_model,
+                    self.d_ff,
+                    dropout=self.dropout,
+                    activation=self.activation,
+                )
+                for l in range(self.d_layers)
+            ],
+            norm_layer=torch.nn.LayerNorm(self.d_model)
+        )
+        
+        # 投影层
+        self.projection = nn.Linear(self.d_model, self.c_out, bias=True)
+        
+    def forward(self, x_enc, x_mark_enc=None, x_dec=None, x_mark_dec=None,
+                enc_self_mask=None, dec_self_mask=None, dec_enc_mask=None):
+        # 如果没有提供x_dec和x_mark_dec，则根据x_enc和label_len生成
+        if x_dec is None:
+            x_dec = torch.cat([x_enc[:, -self.label_len:, :], torch.zeros_like(x_enc[:, :self.pred_len, :])], dim=1)
+        if x_mark_dec is None and x_mark_enc is not None:
+            x_mark_dec = torch.cat([x_mark_enc[:, -self.label_len:, :], torch.zeros_like(x_mark_enc[:, :self.pred_len, :])], dim=1)
+        
+        # 编码
+        enc_out = self.enc_embedding(x_enc, x_mark_enc)
+        enc_out, attns = self.encoder(enc_out, attn_mask=enc_self_mask)
+        
+        # 解码
+        dec_out = self.dec_embedding(x_dec, x_mark_dec)
+        dec_out = self.decoder(dec_out, enc_out, x_mask=dec_self_mask, cross_mask=dec_enc_mask)
+        dec_out = self.projection(dec_out)
+        
+        if self.output_attention:
+            return dec_out[:, -self.pred_len:, :], attns
+        else:
+            return dec_out[:, -self.pred_len:, :] # [B, L, D]

model/Informer/model_config.json

@@ -2,6 +2,11 @@
   {
     "name": "Informer",
     "module": "model.Informer.model",
-    "entry": "InformerEncoder"
+    "entry": "Informer"
+  },
+  {
+    "name": "InformerStack",
+    "module": "model.Informer.model",
+    "entry": "InformerStack"
   }
 ]

train.py

@@ -12,9 +12,9 @@ def read_config(config_path):
         config = yaml.safe_load(file)
 
     # 全局配置
-    device = "cuda:0"  # 指定设备为cuda:0
+    device = "cpu"  # 指定设备为cuda:0
     seed = 2023  # 随机种子
-    epochs = 100  # 训练轮数
+    epochs = 1  # 训练轮数
 
     # 拷贝项
     config["basic"]["device"] = device
@@ -104,9 +104,14 @@ if __name__ == "__main__":
     # model_list = ["iTransformer", "PatchTST", "HI"]
     model_list = ["Informer"]
     # model_list = ["PatchTST"]
-    # dataset_list = ["AirQuality"]
-    # dataset_list = ["SolarEnergy"]
-    # dataset_list = ["BJTaxi-InFlow", "BJTaxi-OutFlow"]
-    dataset_list = ["SolarEnergy", "NYCBike-InFlow", "NYCBike-OutFlow", "METR-LA"]
-    # dataset_list = ["BJTaxi-OutFlow"]
+
+    air = ["AirQuality"]
+    big_dataset = ["BJTaxi-InFlow", "BJTaxi-OutFlow"]
+    mid_dataset = ["PEMS-BAY"]
+    regular_dataset = ["AirQuality", "SolarEnergy", "NYCBike-InFlow", "NYCBike-OutFlow", "METR-LA"]
+    test_dataset = ["BJTaxi-InFlow"]
+
+    all_dataset = big_dataset + mid_dataset + regular_dataset
+
+    dataset_list = test_dataset
     main(model_list, dataset_list, debug=False)