基于复杂网络的武器装备重要度评估方法

针对现有武器装备重要度评估方法存在的缺点和不足,基于复杂网络中改进的节点重要度评估指标和方法,建立了武器装备重要度评估模型。该方法不仅描述了武器装备在装备体系中的重要程度,也反映了武器装备失效后的修复情况。最后通过一评估示例,说明了方法的有效性和适应性。     

基于任务的连续出动舰载机航空保障重调度研究

对舰载机和各种保障资源进行调度是提高舰载机航空保障效率、保证舰载机所承担作战任务顺利完成的有效手段。为了克服以往研究中没有考虑作战任务变更对舰载机航空保障调度的影响,使用重调度的理论与方法研究了基于任务的连续出动舰载机航空保障重调度问题,建立了连续出动舰载机航空保障重调度模型。采用免疫算法对模型进行求解,可以避免模型的解空间可能出现组合爆炸问题。最后通过一个实例表明该模型可以很好的应对由作战任务变更所引起的重调度问起,算法求解速度满足作战需求,从而验证了模型的准确性及算法的有效性。     

伴随维修组维修模型聚合方法

面向装备维修保障系统的多分辨率建模问题,提出了一种装备维修模型的聚合方法,为装备维修保障系统模型的聚合研究提供了一种新的思路。该方法通过聚合故障输入和推理维修状态实现维修模型的聚合。最后通过基于MATLAB的仿真实验验证了该方法的可行性。通过实例验证可以看出,该方法缩短了仿真时间,减少了复杂系统底层建模的工作量。     

【专题】装备保障数据中心体系结构设计

数据中心作为支撑装备保障指挥、管理、维修、供应及训练等业务运行的重要基础,是数据交换的枢纽和各级数据的总汇,也是信息服务的中心,对深化装备保障信息需求、实现保障信息有效管理和强化保障信息综合应用至关重要。本文面向装备保障数据中心建设需求,分析了装备保障数据中心的内涵及其在数据汇聚存储、数据共享交换、保障决策支持及综合信息服务等方面的重要作用,从总体架构、物理结构和数据结构三个方面开展了数据中心体系结构设计;同时,立足装备保障数据中心建设与应用,针对应该重点把握的数据标准规范建设、配套数据采集手段、加强安全保密建设、完善运维管理体系及建立专业分析团队等问题进行了阐述。研究成果可为实际开展装备保障数据中心建设提供 参考。     

美军实行战时合同商保障的做法与启示

通过与地方企业签订合同来满足部队保障需求是中外军队的普遍做法,但军队社会化保障仍主要限于平时。本文通过回溯美军合同保障相关文献,从供求矛盾、外部条件、军事效益三个方面对美军战时合同商保障的兴起原因进行剖析,归纳其经验做法和存在问题,并结合实际,从组织架构、法规体系、管理机制、运用战时合同商保障程序等四个方面给出了军队战时合同商保障的对策建议。随着我国军民融合发展战略的深入推进,中国特色社会主义市场经济优势更加突出,我国地方企业涉及的领域进一步拓展,军地技术运用隔阂逐渐被打破,加之疫情后中国经济展现出更强韧性,总体呈现向上向好的良好态势。以上这些因素将为军队在战时推行合同保障提供有利条件,同时为探索军队战时合同商保障模式提供一定参考。     

单一来源同类装备价格形成机制存在的问题及对策

近年来,随着国防和军队全面深化改革的深入推进和装备建设的快速发展,装备价格管理工作的重要性不断提升,但军队目前承担的装备审价任务日趋繁重,存量不减、增量日增等新情况和新问题给装备价格管理工作带来了新挑战。本文以单一来源同类装备为研究对象,借鉴《军品定价议价规则(试行)》中竞争议价和征询议价不审价的原理,从单一来源同类装备价格的形成主体、装备审价任务量、装备价格的测算方法、装备价格的形成过程以及装备价格的影响因素等五个方面分析了价格形成机制存在的问题,并从主观因素和客观因素两方面探讨了存在问题的原因,提出应在明确价格形成主体的职能权限、科学确定价格的测算方法、完善价格法律法规、建设价格数据平台、加强价格人才队伍建设等方向优化单一来源同类装备价格形成机制的对策建议。     

Experimental investigation on enhanced damage to fuel tanks by reactive projectiles impact

Enhanced damage to the full-filled fuel tank,impacted by the cold pressed and sintered PTFE/AL/W reactive material projectile(RMP)with a density of 7.8 g/cm3,is investigated experimentally and theoretically.The fuel tank is a rectangular structure,welded by six pieces of 2024 aluminum plate with a thickness of 6 mm,and filled with RP-3 aviation kerosene.Experimental results show that the kerosene is ignited by the RMP impact at a velocity above 1062 m/s,and a novel interior ignition phenomenon which is closely related to the rupture effect of the fuel tank is observed.However,the traditional steel projectile with the same mass and dimension requires a velocity up to 1649 m/s to ignite the kerosene.Based on the experimental results,the radial pressure field is considered to be the main reason for the shear failure of weld.For mechanism considerations,the chemical energy released by the RMP enhances the hydrodynamic ram(HRAM)effect and provides additional ignition sources inside the fuel tank,thereby enhancing both rupture and ignition effects.Moreover,to further understand the enhanced ignition effect of RMP,the reactive debris temperature inside the kerosene is analyzed theoretically.The initiated reactive debris with high temperature provides effective interior ignition sources to ignite the kerosene,resulting in the enhanced ignition of the kerosene.     

The deformation and failure mechanism of cylindrical shell and square plate with pre-formed holes under blast loading

The deformation and failure mechanism of cylindrical shells and square plate with pre-formed holes under blast loading were investigated numerically by employing the Ansys 17.0 and Ls-Dyna 971. To calibrate the numerical model, the experiments of square plates with pre-formed circle holes were modeled and the numerical results have a good agreement with the experiment data. The calibrated numerical model was used to study the deformation and failure mechanism of cylindrical shells with pre-formed circle holes subjected to blast loading. The structure response and stress field changing process has been divided into four specific stages and the deformation mechanism has been discussed systematically. The local and global deformation curves, degree of damage, change of stress status and failure modes of cylindrical shell and square plate with pre-formed circular holes are obtained, compared and analyzed, it can be concluded as: (1) The transition of tensile stress fields is due to the geometrical characteristic of pre-formed holes and cylindrical shell with arch configuration; (2) The existence of pre-formed holes not only lead to the increasing of stress concentration around the holes, but also release the stress concentration during whole response process; (3) There are three and two kinds of failure modes for square plate and cylindrical shell with pre-formed holes, respectively. and the standoff distance has a key influence on the forming location of the crack initiating point and the locus of crack propagation; (4) The square plate with pre-formed holes has a better performance than cylindrical shell on blast-resistant capability at a smaller standoff distance, while the influence of pre-formed holes on the reduction of blast-resistant capability of square plate is bigger than that of cylindrical shell.     

浅议行政执法责任制

行政执法责任制是依法行政的重要保障。当前实施行政执法责任制存在着一些问题,应从行政执法责任制的本质和操作规程、依法界定执法职责、建立评议考核机制等三个方面进行改革。     

区块链技术下的智能安全可靠支付系统设计

为了增强支付系统的安全性和可靠性,设计了一种区块链技术下的智能支付系统。这个系统利用区块链的去中心化和分布式账本特性,提供了一种更加安全和透明的支付解决方案。系统将区块链技术、国密算法与支付系统相结合,给传统互联网支付系统提供一个更安全的保障。利用区块链技术的点对点特点,解决支付效率和数据安全等方面的问题。借助互联网大数据技术,对用户进行信用评级,提供信贷服务。结合跨链技术可以对不同区块链的数据进行共享,更好地解决资金流动性。相比比特币和以太坊等电子货币系统,该系统在安全性、交易吞吐率和交易时延等方面做到了权衡发展,使得各方面的性能有了一定程度的均衡提升,更能满足当前环境下的应用需要。