The efficiency of rim-driven thrusters (RDT) has always been the focus attention in context energy conservation and environmental protection. A multi-parameter collaborative optimization framework is proposed to improve RDT based on response surface method (RSM). common structural parameters RDT, including pitch ratio, disk ratio rake angle, are selected as design variables carry out Box–Behnke...

Methods Clinical Records of 17 children (16 girls and 1 boy) were retrospectively analyzed over a period of 24 months (Mar 2012 to Mar 2014). All children satisfied the criteria for precocity based on clinical features, radiological assessment and GnRHa stimulation test. All 16 girls had idiopathic precocious puberty and the only boy had hypothalamic hamartoma. The mean age of presentation was ...

The paper addresses the problem of autonomous underwater vehicle (AUV) modeling and parameter estimation as a means to predict the expected dynamic performance of underwater vehicles and thus provide solid guidelines during the design phase. The use of analytical and semi-empirical (ASE) methods to predict the hydrodynamic derivatives of the most popular class of AUVs is discussed. An applicati...