电力推进船舶中央冷却系统动态特性建模及控制仿真

通过对电力推进船舶中央冷却系统的综合分析，建立电力推进船舶中冷系统的稳态换热模型和动态换热模型。对中冷系统的冷却水出口温度的控制方案，进行了传统的PID控制和基于功率的前馈、反馈控制研究，并在此基础上对控制方案计算机仿真，比较两种控制方案的区别。     

93米多功能海洋平台供应船的噪声与振动控制

概括地介绍了93米平台供应船的主要技术指标，重点论述噪声与振动控制设计的理论计算，同时在实船航行试验时所作的噪声与振动测试情况作了说明。     

长江南京三桥建桥后船舶航行过程数值模拟

建立了船舶运动基本方程，通过实船静水操纵性能试验比较，操纵性指数与实测基本一致，由于南京三桥修建后，破坏原来的航线，需要规划新的航线，新航线考虑了船舶的习惯航线以及桥墩对原来的航线的影响，运用该数模计算新航线的船舶操作参数的变化，结果表明，上行船队和下行船队的各级流量船舶航行操作参数变化较小，说明新航线选择合理。     

舰船红外图象结构特征提取算法的研究

提出两种特征提取算法：ＦＦＴ和样条函数法来提取舰船红外图象结构的特征信息，采用ＢＰ神经网络算法进行识别。实验结果表明，对于高分辨率的舰船上层结构的红外象而言，局部化特征优于全局化特征，即采用样条函数法比ＦＦＴ法有较高识别率。     

船舶航行条件的实时模拟

简要介绍了船舶航行条件实时模拟的基本原理和船舶操纵运动数学模型及实时算法。通过某工程双线船闸下游引航道进闸航行条件的实时模拟,说明了应用实时模拟研究航道航行条件的方法和步骤。     

一种时间序列多重分形分析的改进方法及其应用

通过分析时间序列广义维数的不同计算方法,本文引入一种新的多重分形奇异测度概念,提出了一种时间序列多重分形分析的改进方法。该方法不仅计算量小,而且其得到的连续分段线性曲线序列的广义维数具有恒等于１ 的性质。由于现实中许多信号可以用连续分段线性曲线逼近,因此上述性质深入刻划了这类信号的一个共同特征。仿真结果表明,本文推导出的性质为信号奇异性检测开辟了一条新途径,利用本文方法还可以快速有效地提取实测舰船噪声的短时多重分维特征。     

舰空导弹雷达引信抗干扰技术研究

简要介绍了舰空导弹雷达引信工作的特点，分析了在未来海战中舰空导弹雷达引信面临的典型干扰环境，给出了抗干扰的主要技术措施。     

A novel ship wake detection method of SAR images based on frequency domain

Moving ships produce a set of waves of “V“ pattern on the ocean. These wavescan often be seen by Synthetic Aperture Radar (SAR). The detection of these wakes can provide important information for surveillance of shipping, such as ship traveling direction and speed.A novel approach to the detection of ship wakes in SAR images based on frequency domain is provided in this letter. Compared with traditional Radon-based approaches, computation is reduced by 20%-40% without losing nearly any of detection performance. The testing results using real data and simulation of synthetic SAR images test the algorithm‘s feasibility and robustness.     

Sensitivity Analysis Methods to Design Optimal Ship Hulls

Automatic procedures for the design of ship hull geometries yielding minimal wave resistance and wave breaking are an attractive opportunity from both the economical and practical standpoints. Estimating the cost function gradient according to the Sensitivity Equation and Adjoint Methods (SEM, AM) instead of using the standard finite difference approximations has the potential of reducing the computational cost of the overall optimization procedure. Aim of this paper is to assess the actual extent of the cost reduction. Speed-up factors of up to 3.3 have been obtained in the evaluation of the cost function gradient and of about 1.6 in the overall optimization procedure applied to an optimal shape design problem of an existing tanker ship. The SEM and AM methods perform better than finite differences mainly because of (i) the smaller number of flow solutions needed to compute the cost function gradient and (ii) the opportunity of using the same LU factored matrix for both the flow solver and the SEM or AM equations, a circumstance arising as a consequence of having chosen a linearized potential flow model of the 3D free-surface problem.     

厚规格船板钢DH36的生产实践

厚规格高强度船板钢的生产实践表明，采取适宜的成分与控制轧制和控制冷却工艺设计，可确保高强度船板钢具有良好的综合力学性能；同时，分析了影响高强度船板钢组织、性能的因素，发现适当提高终冷设定温度不会影响细晶强化，且可改善表层过冷组织。