[Retracted] Wireless Sensor Network Technology-Based Design and Realization of Intelligent Tennis Sports System

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/wcmc/volume-2022/3260000/figures/3260000.fig.009a.svgz" name="3260000.fig.009a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Growth rate of tennis courses offered in 2019</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/wcmc/volume-2022/3260000/figures/3260000.fig.009b.svgz" name="3260000.fig.009b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Growth rate of tennis courses offered in 2020</td></tr></table>

<div>Growth rate of tennis courses offered in 2019 and 2020.</div>

Wireless Communications and Mobile Computing

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Figure 9

Figure 9: [Retracted] Wireless Sensor Network Technology-Based Design and Realization of Intelligent Tennis Sports System 