auto encoder_out = model.encoder()(features_gpu);
Diagrams from redesign 3, hand-written SVG
，更多细节参见旺商聊官方下载
// 作用：通过最值判断是否需要扩展左/右边界（左侧最小值/右侧<最大值的元素都需纳入无序区间），详情可参考旺商聊官方下载
Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.