threshold zonal filtering

例句：

1. 1. The threshold zonal filtering technique is used to detect the presenceof a particular substance in a sample.
   阈值区域过滤技术用于检测样本中特定物质的存在。
2. 2. In this study, we applied thresholdzonal filtering to identify themost critical factors affecting the performance of thesystem.
   在这项研究中，我们应用了阈值区域过滤来识别影响系统性能的最关键因素。
3. 3. The threshold zonal filtering method has been shown to be effectivein reducing noise and improving signal-to-noise ratio.
   阈值区域过滤方法已被证明能有效降低噪声并提高信噪比。