PM2.5 Concentration Forecasting in Industrial Parks Based on Attention Mechanism Spatiotemporal Graph Convolutional Networks

<div>The framework of STAM-STGCN. TAtt is temporal attention. SAtt is spatial attention. ST-Conv Block is a spatiotemporal convolutional block. <svg height="8.8423pt" id="M63" style="vertical-align:-0.2064009pt" version="1.1" viewbox="-0.0498162 -8.6359 6.25863 8.8423" width="6.25863pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M449 634C442 637 425 643 405 650C376 660 341 666 307 666C181 666 98 590 98 485C98 400 170 343 215 310L246 288C307 243 343 204 343 147C343 67 291 18 219 18C104 18 61 124 51 202L23 199C28 124 27 71 27 47C47 22 122 -16 204 -16C324 -16 428 60 428 174C428 256 379 309 307 360L276 382C223 419 179 455 179 516C179 576 221 632 293 632C379 632 410 564 418 487L448 490C446 536 446 592 449 634Z"></path></g></svg> is the spatial attention matrix. <svg height="8.68572pt" id="M64" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 9.2729 8.68572" width="9.2729pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M686 28C612 35 607 44 591 112C563 234 541 360 519 489L489 666L457 658L147 121C100 40 89 36 24 28L17 0H240L250 28C168 34 159 41 190 101L262 237H482C495 180 503 137 510 91C517 47 514 35 441 28L433 0H677L686 28ZM475 280H285L429 541H431L475 280Z"></path></g></svg> is the adjacency matrix. <svg height="12.7178pt" id="M65" style="vertical-align:-3.03148pt" version="1.1" viewbox="-0.0498162 -9.68632 14.6099 12.7178" width="14.6099pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,.007)"><path d="M1059 256C1059 532 834 755 556 755S53 532 53 256S278 -243 556 -243S1059 -20 1059 256ZM1001 256C1001 8 802 -193 556 -193S111 8 111 256S310 705 556 705S1001 504 1001 256ZM618 256C618 292 591 319 556 319S494 292 494 256C494 219 521 193 556 193S618 219 618 256Z"></path></g></svg> is the Hadamard product.</div>

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Figure 7

Figure 7: PM2.5 Concentration Forecasting in Industrial Parks Based on Attention Mechanism Spatiotemporal Graph Convolutional Networks 