Xukun Yin

Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available from the corresponding author upon reasonable request. References 1, , , et al., “Natural Gas Pipeline Leak Detection System for Laser Remote Sensing and Calibration,” Zhongguo Jiguang (Chinese Journal of Lasers) 37, no. 11 (2010): 2912–2917.

1 Introduction In sensor data processing systems, researchers are often confronted with large amounts of multimodal and complex sensing data. To deal with these sensing data, data description and data reduction are pivotal process. For data acquisition, rough sets based models are considered as effective approaches in recent years [1, 2]. Rough set theory [3] was proposed in 1982 by Pawlak as a mathematical tool for analyzing and handling imprecise, inconsistent, and incomplete information.

1 Introduction Marine microseismic/acoustic monitoring is crucial for exploiting marine mineral resources and national underwater military defense [1, 2]. DAS based on phase-sensitive optical time-domain reflectometry (Φ-OTDR) has recently attracted attention in applications such as hydroacoustic detection [3, 4]. Φ-OTDR, a promising technique for DAS, has demonstrated its ability to provide real-time measurement reaching into the acoustic range [5–7].