不准出入境的法律性质探析

根据出入境管理相关法律法规的具体规定,通过对不准出入境内含的各个要素进行分拆而予以具体定性.以不准出入境的不同适用对象为主线,结合具体的行为主体和适用条件分析论证其法律性质.不准出入境既不属于行政强制措施,也不属于行政处罚或处理性行政决定,而属于行政许可、行政协助或国家行为(视具体情形而定).     

舰船液压变距桨控制系统的改进设计

介绍了一种新型的变距桨控制系统。通过采用不同的控制方法,提高了螺距角的控制精度、稳定性和跟踪响应的快速性,使原系统的可靠性大大提高。     

关于舰用机电产品可靠性分布问题探讨

在失效机理分析的基础上,着重从理论上探讨了舰用机电产品在使用中的可靠性分布类型,并给出了简化的计算方法。     

平面图形对象拾取算法研究

介绍了在图形处理中,利用面向对象技术实现的平面图形对象拾取算法。与传统的以大量图像信息的存储为基础的位图存储方式下的图形对象拾取算法相比,本算法不但包括单个图形对象的拾取,而且也探讨了在复杂的图形组合下,如在图形重叠与覆盖的情况下进行多个图形对象拾取所需解决的算法难点。本算法对提高图像信息的存储效率和图形对象拾取的质量,对图像科学与面向对象技术的发展具有实际意义。     

Modeling and solution for the ship stowage planning problem of coils in the steel industry

We consider a ship stowage planning problem where steel coils with known destination ports are to be loaded onto a ship. The coils are to be stowed on the ship in rows. Due to their heavy weight and cylindrical shape, coils can be stowed in at most two levels. Different from stowage problems in previous studies, in this problem there are no fixed positions on the ship for the coils due to their different sizes. At a destination port, if a coil to be unloaded is not at a top position, those blocking it need to be shuffled. In addition, the stability of ship has to be maintained after unloading at each destination port. The objective for the stowage planning problem is to minimize a combination of ship instability throughout the entire voyage, the shuffles needed for unloading at the destination ports, and the dispersion of coils to be unloaded at the same destination port. We formulate the problem as a novel mixed integer linear programming model. Several valid inequalities are derived to help reducing solution time. A tabu search (TS) algorithm is developed for the problem with the initial solution generated using a construction heuristic. To evaluate the proposed TS algorithm, numerical experiments are carried out on problem instances of three different scales by comparing it with a model‐based decomposition heuristic, the classic TS algorithm, the particle swarm optimization algorithm, and the manual method used in practice. The results show that for small problems, the proposed algorithm can generate optimal solutions. For medium and large practical problems, the proposed algorithm outperforms other methods. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 564–581, 2015     

美军联合信息作战效果评估及特点

联合信息作战效果评估是美军联合信息作战的重要组成部分,基于美军2014年重新颁发的《联合信息作战条令》,重点阐释了联合信息作战效果评估的概念、目的及流程,分析研究了联合信息作战效果评估的基本特点。     

亥姆霍兹线圈磁场均匀性的研究

推导了亥姆霍兹线圈所产生的磁感应强度的计算公式,利用该公式进行了编程计算,研究了亥姆霍兹线圈在空间所产生的磁场分布规律．以１％均匀度为例给出了磁场均匀区与环半径（距离）之间的关系．     

完善舰船装备维修体制 提高预防性维修水平

分析了海军装备目前的维修现状以及存在的问题,论述了实行视情维修的重要性和必要性,提出了建立以视情维修为主的预防性维修大纲的原则．     

基于软件构件技术的信息系统开发

对于基于软件构件技术的信息系统开发,通过分析信息系统的特点,提出了信息系统对象模型和信息系统中软件构件的构架方法。并据此提出了建立信息系统的四层次结构模型。在此基础上设计和实现了院办公室信息系统。     

车辆碰撞检测的仿真

为了提高车辆驾驶仿真的可信性,本文采用物体外部轮廓近似投影法,建立了车辆碰撞检测的一种简化数学模型,并进行了仿真验证。结果表明本模型具有简单和计算快捷的特点,能满足车辆碰撞检测的仿真要求。该模型已得到实际应用。