In order to track underwater short-distance target,the method based on the combination of passive sonar and extended Kalman filter was proposed.

Combining our work experience of many years, the article make a thoroughly discuss for all kinds of synchronous clock underwater ranging techniques.

It gives point to review arious synchroclock underwater ranging techniqueand ourinvestigation practice for years.

Research purposes: There is no mature scheme of horizontally approaching excavation shield tunnel,so references could be provided for design and construction of the similar projects.

APPLICATION OF THE BAYES DISCRIMINANT ANALYSIS TO SEDIMENTARY MICROFACIES OF THE NON-CORES INFORMATION'S DRILLS ——Taking the nearshore subaqueous fan's conglomerate of the fourth member stratum of Shahejie Formation in Luojia nose-type st;

Seismic prediction of nearshore subaqueous fan in Shaobo,Gaoyou Depression;

Sedimentary characteristics of nearshore subaqueous fan of Neogene Ciying Formation in Luliang basin.Yunnan;

Sedimentary characteristics of nearshore subaqueous fans in steep slope of Dongying depression;

Study on the Heterogeneity and 4-Dimensional Reservoir Model of the Nearshore Subaqueous Fans System

The glutenites of nearshore subaqueous fans in the actic area of the Langgu depression migrate rapidly in the vertical and landscape orientations,are strong anisotropism,and difficult to explore.

The sandstone and conglomerate rock mass can be classified as alluvial fan,fan delta,nearshore underwater fan,deepwater turbidite fan and gully turbidite in terms of genesis.