Immune multi-agent model using vaccine for cooperative air-defense system of systems for surface warship formation based on danger theory

Aiming at the problem on cooperative air-defense of surface warship formation, this paper maps the cooperative airdefense system of systems （SoS） for surface warship formation （CASoSSWF） to the biological immune system （BIS） according to the similarity of the defense mechanism and characteristics between the CASoSSWF and the BIS, and then designs the models of components and the architecture for a monitoring agent, a regulating agent, a killer agent, a pre-warning agent and a communicating agent by making use of the theories and methods of the artificial immune system, the multi-agent system （MAS）, the vaccine and the danger theory （DT）. Moreover a new immune multi-agent model using vaccine based on DT （IMMUVBDT） for the cooperative air-defense SoS is advanced. The immune response and immune mechanism of the CASoSSWF are analyzed. The model has a capability of memory, evolution, commendable dynamic environment adaptability and self-learning, and embodies adequately the cooperative air-defense mechanism for the CASoSSWF. Therefore it shows a novel idea for the CASoSSWF which can provide conception models for a surface warship formation operation simulation system.

Dynamic WTA optimization model of air defense operation of warships' formation

WTA （weapon-target allocation） of air defense operation is a very complicated problem and current models focus on static and restricted WTA problem mostly. Based on the dynamic characteristics of air defense operational command and decision of warships＇ formation, a dynamic WTA model is established. Simulation results show that switch fire and repetition fire of anti-air weapon system affect the result of the air defense operation remarkably and the dynamic model is more satisfying than static ones. Related results are gained based on the analysis of the simulation results and the results are accordant with the intuitionistic tactical judgment. The model is some reference for the research of air defense C^3I system of warships＇ formation.

Mission-oriented dynamic optimization model of carrying spares for warship redundant system

Redundancy is a common structure for warship system,and it is an effective way to improve the reliability of the system.In this paper, warship system is taken as the object of study,based on the system reliability equivalence principle, a spares demand rate calculation method for redundant system is proposed through structure transformation. According to the system analysis method, the general modeling data structure of spares support echelon and system indenture is established, and the mission success probability is taken as the optimization target to build the dynamic optimization model of carrying spares during the process of multi-phase. By introducing the Lagrange multiplier, the spares weight, volume and cost are transformed to the single target of the spares total scale, and the initial Lagrange factors and its dynamic adjustment policy is proposed. In a given example, the main influence factors of the carrying spares project are analyzed, and the study results are in accordance with the reality, which can provide a new approach to mission-oriented carrying spares optimization for the redundant system.

Modeling and Assessing a New Warship Maintenance System

The authors developed a prototype of a warship maintenance system. The process started by defining the maintenance requirements of warship equipment. Next, a planning scheme was development for a maintenance network. An optimization target for the plan and indexes for assessment were established. Based on the above work, a simulation model was proposed with two layers: a base and a workshop. Dispatching rules were then formulated for the simulation. Experimental results proved the validity of the model and the dispatching algorithm. It was found that the model can solve the capacity evaluation problem for maintenance systems and provides a scientific basis for decision-maker to make decisions regarding equipment maintenance.

Research on Software Structure Analysis Technology and Reliability Evaluation Method of Warship Equipment

In view of the current reliability evaluation requirements of warship equipment based on component, this paper comprehensively considered the characteristics of components,and the component identification method, structural decomposition method,component architecture modeling method were studied for warship equipment software. Based on the characteristics of warship equipment component, this paper proposed a formal modeling language based on Petri nets to realize the modeling of component software architecture and laid a foundation for the reliability evaluation method research of warship equipment component.

Risk transmission evaluation for parallel construction of warships based on IFCM and the cloud model

To cope with multi-directional transmission coupling,spreading, amplification, and chain reaction of risks during multiproject parallel construction of warships, a risk transmission evaluation method is proposed, which integrates an intuitionistic cloud model with a fuzzy cognitive map. By virtue of expectancy Ex, entropy En, and hyper entropy He, the risk fuzziness and randomness of the knowledge of experts are organically combined to develop a method for converting bi-linguistic variable decision-making information into the quantitative information of the intuitionistic normal cloud(INC) model. Subsequently, the threshold function and weighted summation operation in the traditional fuzzy cognitive map is converted into the INC ordered weighted averaging operator to create the risk transmission model based on the intuitionistic fuzzy cognitive map(IFCM) and the algorithm for solving it. Subsequently, the risk influence sequencing method based on INC and the risk rating method based on nearness are proposed on the basis of Monte Carlo simulation in order to realize the mutual conversion of the qualitative and quantitative information in the risk evaluation results.Example analysis is presented to verify the effectiveness and practicality of the methods.

The Model Research on the Flooding Time of the Warship Damaged Compartment

Research on damage stability and unsinkability is a valuable source of knowledge of behaving a ship while flooding its compartments. The time when compartment is flooded （ty） and stability parameters are key elements which have influence on a rescue action. The knowledge of the time mentioned is very important for a commanding officer to make decisions while fighting for survival of the ship. Therefore, the purpose of research was to develop a method to accurately and quickly calculate the flooding time of selected ship compartment. To provide the information about the time ty, a new method was designed. This method was based on an accurate determination of the amount of water entering to the compartment. For this purpose, the permeability depends on the water level in the compartment. Next, the computer program was built for both the time tfcalculation and showing the flooding process. This method was tested experimentally and the results of the tests are presented in the paper. In the next part of research, which was carried out on the laboratory stand bed, the flooding time of damaged compartment of warship model was measured. The results of calculation are compared to the experiments and discussed.

Prediction of Hull Deflection on Damaged Warship

The appropriate prediction of the hull deflection of a severely damaged warship is an important area in the research of the warship survivability. In this paper, the asymmetrical beam bending theory is applied to set up the damaged model, a comparison of the longitudinal strength, the deflections of damaged hull subjected to both hagging and sagging moments, and shear forces is carried out. The external loads are also calculated according to different damaged positions. Finally, some results and conclusions are obtained.

Unscented Kalman Filter for Autonomous Warship Attitude Determination

To address a problem of autonomous attitude determination algorithm using gravitational field and geomagnetic field observation, a new recursive optimization autonomous attitude estimation algorithm is proposed. The algorithm is based on unscented Kalman filter(UKF), and can synchronously provide the attitude rate information. The simulated results show that the measurement precision of the method could be increased by 2 times compared to that of the common methods.

Calculation Model and Simulation of Warship Damage Probability

The combat efficiency of mine obstacle is the focus of the present research. Based on the main effects that mine obstacle has on the target warship damage probability such as: features of mines with maneuverability, the success rate of mine-laying, the hit probability, mine reliability and action probability, a calculation model of target warship mine-encounter probability is put forward under the condition that the route selection of target warships accords with even distribution and the course of target warships accords with normal distribution. And a damage probability model of mines with maneuverability to target warships is set up, a simulation way proved the model to be a high practicality.

以能力为导向的兼职潜水员人才培养模式研究

兼职潜水员作为舰艇部队重要作战力量,构建系统科学的兼职潜水员人才培养模式是增强部队战斗力的重要举措。论文以兼职潜水员岗位履行能力的创新潜水专业人才培养为主线,以实战化潜水作业核心能力培养为导向,构建了以能力为导向的人才培养方案,规划了科学合理的人才培养成长路径,建立了标准的分级分类训练和考核认证体系,为健全水面舰艇兼职潜水员人才培养模式改革提供有益探索。

基于综合贡献率的舰船装备体系寿命评估

为了更科学地预测装备寿命,提升装备的作战效益,从装备对体系的“综合贡献率”视角出发,探究了舰船装备“体系寿命”的评估方法。首先,基于作战环理论和非线性结构方程模型,引入二次交互项,构建舰船装备体系作战能力的指标体系,建立了体系作战效能的评估模型;然后,运用阈值法建立了舰船装备体系的复杂网络模型,基于拓扑特征统计值,构建了舰船装备体系网络结构特征的指标体系,将层次分析法与熵权法相结合来计算指标权重;最后,提出了舰船装备体系综合贡献率、体系寿命的定义和数学模型,并以航母编队体系对抗为算例,通过实验仿真数据,验证了模型和方法的可行性和有效性。

略论明朝水师仿制欧洲火器及其击败荷兰军舰的火攻战术

郑成功水师于1661年收复中国台湾的战役中击败荷兰水师,并击沉荷兰主力舰“赫克托号”,这是明朝水师对外战役中最杰出的战绩之一。自从葡萄牙舰队出现于闽粤海面以来,明军一直在研究和仿制欧洲军舰及其火器,在火炮、火枪等方面都有很大的进步。不仅如此,明军还研发了推送火船和抛掷火罐等火攻战术,并将其和明军传统近战战术相结合,这才取得在浅海攻击欧洲军舰的海上优势。因此,明军击沉荷兰主力舰“赫克托号”不是偶然的。

舰艇官兵依恋焦虑对主观幸福感的影响:自尊和负性情绪的链式中介作用

目的探究海军舰艇官兵依恋焦虑对主观幸福感的影响,揭示自尊、负性情绪在其中的中介作用。方法使用便利抽取法选取海军舰艇官兵288人,采用成人依恋量表、自尊量表、7项广泛性焦虑障碍量表、患者健康问卷抑郁自评量表和纽芬兰纪念大学幸福度量表进行问卷调查。采用Pearson相关分析、多元线性回归分析及结构方程模型分析依恋焦虑、自尊、负性情绪与主观幸福感之间的关系。结果相关分析显示,依恋焦虑、自尊、焦虑、抑郁和主观幸福感两两相关(均P<0.01)。多元回归分析显示,依恋焦虑、自尊、抑郁和焦虑可共同预测主观幸福感的42.4%。链式中介模型各项拟合指数良好(χ^(2)/df=0.170,P=0.844,拟合优度指数为0.999,调整拟合优度指数为0.996,规范拟合指数为0.999,相对拟合指数为0.997,比较拟合指数为1.000,近似误差均方根为0.000),结果显示自尊、负性情绪在依恋焦虑与主观幸福感之间起完全链式中介作用。结论舰艇官兵的依恋焦虑既可以通过自尊、负性情绪的单独中介作用,也能通过自尊、负性情绪的完全链式中介作用影响其主观幸福感。

舰船环境适应性设计方法探索与实践

探索舰船环境适应性的设计方法,以提高舰船在各种复杂环境下的适应能力。分析了舰船环境适应性设计中面临的若干问题和改进提高方向,参考借鉴国内外航空航天、电子等行业成功经验,提出了指导舰船环境适应性设计的主要设计原则和工作内容。围绕改善环境条件、加强耐环境能力设计这2个方面,提出了3种环境适应性设计方法,包括基于规范的设计方法、基于环境仿真的设计方法、基于预使用验证的设计方法。根据舰船风浪环境适应性设计的特点和要求,选择采用环境仿真和模型试验技术开展了应用研究。基于分析结果,提出了增加水线面系数、调整浮心、优化线型等多项改进措施建议。采用环境仿真和模型试验相结合的方式,可有效支撑舰船风浪环境适应性设计和评估,这一方法具有较高的工程推广应用价值。另外,未来应加大环境仿真技术的研究和应用力度,尝试开展多因素综合环境仿真,以进一步提高舰船的环境适应性。

一种面向舰船结构毁伤的大变形流固耦合数值计算方法

水下爆炸导致舰船结构毁伤是一个复杂的非线性大变形流固耦合过程,高精度的流固耦合计算是获得高置信模拟结果的关键。基于浸没边界思想,本文提出一种面向大变形壳理论的流固耦合数值方法,可精确刻画流固耦合界面并高效求解流固界面约束方程。基于该方法,本文提出了完整的适用于水下爆炸舰船结构毁伤的大变形流固耦合数值计算方案,并基于大规模并行编程框架,研发形成适用于舰船结构毁伤的流固耦合大规模并行计算软件。与泰勒平板理论解和水下爆炸结构冲击响应实验数据等进行对比表明,本文方法可有效模拟大变形流固耦合工程问题,具备较高数值求解精度。在此基础上,完成了水下爆炸整船结构毁伤过程大规模数值模拟。该方法可有效应用于舰船毁伤等级评估,应用前景广阔。

水面舰艇网络攻击威胁分析

现代水面舰艇大量使用信息技术,面临严重的网络攻击威胁,深入分析水面舰艇网络攻击威胁,对提高水面舰艇网络安全防护能力至关重要。水面舰艇网络攻击威胁主要来源于敌对势力和我方人员,可分为在线攻击和离线攻击两大类,主要包括边界突破攻击、中间接入攻击、恶意代码代码植入攻击、潜信道攻击等。针对实现各类网络攻击的难点,可采取加强舰艇信息保密、强化网络边界防护、及时封堵安全漏洞等防护措施。

基于多任务学习的近岸舰船检测方法

在遥感光学图像近岸舰船目标检测任务中,针对近岸复杂场景中存在形状近似目标的虚警问题,提出一种基于多任务学习的近岸舰船目标检测方法。该方法通过构建海陆分割任务与舰船检测任务并行双路框架,将传统的任务串行处理流程优化为并行处理方式,设计联合损失函数进行双路优化训练约束,提升模型训练的稳定性,通过双分支融合模块剔除陆地掩膜中的检测结果,实现陆地虚警滤除。采用谷歌地球遥感图像制作的数据集进行实验,将本文提出的方法与单任务检测算法YOLOv5相比,mAP提升了4.4个百分点,虚警率降低了3.4个百分点。实验结果表明本文算法对陆地虚警抑制有效。

极地船舶直升机综合保障方法研究

为满足我国日益增加的极地船舶航空保障需求,有必要提出1套符合极地低温、结冰等极端环境条件下的船舶航空保障方法。该文通过对现行常用极地规范、标准及实船配置的研究,分析其与极地极端环境不相称之处,并借鉴国内外相关系统,提出针对性的改进方案。这些改进后的极地船舶航空保障方法,可有选择性地应用于未来极地船舶的设计和建造中。

舰船尾流场实船测量技术浅析

舰船尾流场是影响舰载直升机安全起降的关键环境条件,其实船测量技术的发展一直备受关注。本文从分析国内外舰船尾流场实船测量研究现状入手,梳理出拉烟形态显示、方向动压探针阵列测量、超声波测风、激光测风雷达、量子测风雷达等5种典型尾流场实船测量技术,并依据主要性能指标对这5种技术进行对比分析,最后对舰船尾流场实船测量技术发展进行总结与展望。