堆叠自动编码机（SdA）可用于图像识别领域，但在图像搜索等领域，堆叠去噪自动编码机（SdA）的应用效果更佳。(Stacked automatic coding machine (SdA) can be used in the field of image recognition, but in the field of image search, stack denoising automatic coding machine (SdA) has better application effect.)