摘要：为了在设计上回答耻辱，挥动标准并且挥动参数在设计上推荐新考虑，基于波浪的统计特征和给回来时期定义的海状态的短期的概率性质的长期的分发，回来时期的计算，高度，时期，和设计波浪和预报方法的海洋的波浪参数在这篇论文被讨论。为了在极端海为漂浮的结构的操作可靠性提供参考书，说，决定设计波浪参数的方法是 resurveyed。一个建议被推荐设计波浪，它能是也重要的波浪与回来时期，或有超过概率的 1/N 的最大的波浪 500 年，回来时期 100 年，能在设计设计实践被使用。

摘要：Roll motion of ships can be distinguished in two parts:an unavoidable part due to their natural movement while turning and an unwanted and avoidable part that is due to encounter with waves and rough seas in *** the attenuation of the unwanted part of roll motion,ways have been developed such as addition of controllable fins and changes in *** paper investigates the effectiveness of augmenting the rudder used for rejecting part of the unwanted roll,while maintaining steering and course changing *** this purpose,a controller is designed,which acts through intentional superposition of fast,compared with course change,movements of rudder,in order to attenuate the high-frequency roll effects from encountering rough *** results obtained by simulation to exogenous disturbance support the conclusion that the roll stabilization for displacement can be effective at least when displacement hull vessels are ***,robust stability and performance is verified for the proposed control scheme over the entire operating range of interest.

摘要：Based on experimental data of line heating, the methods of vector mapping, plane projection, and coordinate converting are presented to establish the spectra for line heating distortion discipline which shows the relationship between process parameters and distortion parameters of line heating. Back-propagation network (BP-net) is used to modify the *** models for optimizing line heating techniques parameters, which include two-objective functions,are constructed. To convert the multi-objective optimization into a single-objective one, the method of changing weight coefficient is used, and then the individual fitness function is built up. Taking the number of heating lines, distance between the heating lines’ border (line space), and shrink quantity of lines as three restrictive conditions,a hierarchy genetic algorithm (HGA) code is established by making use of information provided by the spectra, in which inner coding and outer coding adopt different heredity arithmetic operators in inherent operating. The numerical example shows that the spectra for line heating distortion discipline presented here can provide accurate information required by techniques parameter prediction of line heating process and the technique parameter optimization method based on HGA provided here can obtain good results for hull plate.