On the Analytical Approach to Present Engineering Problems: Photovoltaic Systems Behavior, Wind Speed Sensors Performance, and High-Speed Train Pressure Wave Effects in Tunnels

<div>Damaged cup anemometer with one cup missing at “flag” position during the testing campaign (wind tunnel wind speed is around <svg height="9.21094pt" id="M219" style="vertical-align:-0.2129908pt" version="1.1" viewbox="-0.0498162 -8.99795 9.74132 9.21094" width="9.74132pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M697 650H468L461 623L492 619C539 613 547 605 518 546C481 471 367 264 278 116H276C239 278 197 500 186 567C180 604 185 613 226 619L252 623L260 650H24L17 623C78 617 92 613 108 533L216 -11H247C365 200 515 462 560 529C616 612 624 615 689 623L697 650Z" id="g113-87"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="709" vert-adv-y="709"></glyph.data></g></svg> = 6 m/s; wind-flow direction is indicated with an arrow in the picture). View from the top-window of the calibration tunnel at the IDR/UPM Institute.</div>

Mathematical Problems in Engineering

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Figure 7

Figure 7: On the Analytical Approach to Present Engineering Problems: Photovoltaic Systems Behavior, Wind Speed Sensors Performance, and High-Speed Train Pressure Wave Effects in Tunnels 

Figure 7 | On the Analytical Approach to Present Engineering Problems: Photovoltaic Systems Behavior, Wind Speed Sensors Performance, and High-Speed Train Pressure Wave Effects in Tunnels 