舰用计算机局部网络通信协议的设计

介绍了舰用计算机局部网络通信协议的设计,重点描述了设计中为提高实时性和可靠性所采用的一些具体技术措施,其中包括:简化ISO/OSI—RM 参考模型,并与IEEE8024标准协议兼容,采用VLSI 技术设计网络接口卡。同时,对其中一些关键技术,如逻辑环的建立与维护、信息的优先级发送与实时响应、数据缓冲区的结构与管理都作了说明。     

焊接接头的 TIG 熔修对潜艇耐压壳体抗爆性的影响

本文初步探讨了 TIG 熔修工艺对潜艇耐压壳体抗爆性的影响。试验结果表明,TIG 熔修可以有效地延缓在爆炸载荷作用下焊接接头裂纹的发生和发展。本文的工作为深入、系统地研究熔修工艺对潜艇耐压壳体抗爆性的影响作了有益的尝试,并为提高潜艇耐压壳体抗爆性指出了新的途径。     

关联维数在转子系统状态监测应用时参数选择的实验研究

给出了转子系统状态的关联维数方法,通过获取大量实验数据来计算关联维数。在此基础上讨论了在计算关联维数时如何选择合适的重构相空间的矢量数、嵌入维数、时间延迟及矢量间间距等参数,最后给出了分析结果。     

管道中高次波的有源控制

探讨管道中高次波的有源控制问题.首先,对消声条件下的次级声源强度进行了理论分析,并对误差传声器的数目与位置进行了讨论.最后,进行了控制方截面管中(0,0)次波(平面波)和(1,0)次波的实验.结果表明,对管道中的高次波实施有源控制是完全可能的.     

系统的模糊可靠度、模糊故障率和模糊平均寿命之间的关系

讨论了系统的模糊可靠度、模糊故障率和模糊平均寿命之间的关系及串联、并联系统的模糊可靠度、模糊平均寿命与元件的模糊故障率、模糊平均寿命的关系。     

光纤弯曲损耗的研究

利用光线理论研究光纤弯曲损耗与弯曲半径、纤芯折射中以及包层折射率的关系。     

氯酸钾对不锈钢在硫酸和盐酸混合溶液中的缓蚀行为

研究了缓蚀剂ＫＣｌＯ３在７０％Ｈ２ＳＯ４和０．２％ＨＣｌ溶液中对１８—８不锈钢的缓蚀行为。运用线性极化技术测定了缓蚀剂的缓蚀效率为９６％。动电位极化曲线、循环极化曲线及交流阻抗的测量表明,缓蚀剂ＫＣｌＯ３是一种阳极钝化型缓蚀剂,添加缓蚀剂ＫＣｌＯ３后,不锈钢表面氧化膜进一步加强,从而有效地抑制不锈钢的均匀腐蚀和孔蚀。     

夺占小型岛屿作战综合登陆舰编队展开点选择优化模型

针对综合登陆舰编队夺占小型岛屿作战中的威胁特点,确定了岸基航空兵对综合登陆舰的有效掩护区,建立了综合登陆舰展开点选择的优化模型,并给出了简单方便的图上作业法,为合理确定综合登陆舰的展开点提供了方法和依据。     

On the effectiveness of returns policies in the price‐dependent newsvendor model

We study in this paper the price‐dependent (PD) newsvendor model in which a manufacturer sells a product to an independent retailer facing uncertain demand and the retail price is endogenously determined by the retailer. We prove that for a zero salvage value and some expected demand functions, in equilibrium, the manufacturer may elect not to introduce buybacks. On the other hand, if buybacks are introduced in equilibrium, their introduction has an insignificant effect on channel efficiency improvement, but, by contrast, may significantly shift profits from the retailer to the manufacturer. We further demonstrate that the introduction of buybacks increases the wholesale price, retail price, and inventory level, as compared to the wholesale price‐only contract, and that the corresponding vertically integrated firm offers the lowest retail price and highest inventory level. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

Influence of a liquid-filled compartment structure on the incoming shaped charge jet stability

Liquid-filled compartment structure consists of a bulk steel plate with matrix blind holes which are filled with liquid and a steel front plate to seal up the liquid with rings and bolts.The liquid-filled compart-ment structure can resist the shaped charge warhead effectively.This paper presents experimental and theoretical investigations of the penetration ability of the residual shaped charge jet emerging from the liquid-filled compartment structure after the penetration process at different impact angles.On the basis of shock wave propagation theory,the influence of the liquid-filled compartment structure on jet sta-bility is analysed.The interferences of the liquid backflow caused by a reflected shock wave and a back plate on jet stability under different impact angles are also examined.In addition,the range of the disturbed velocity segments of the jet at different impact angles and the penetration ability of the re-sidual jet are obtained.A theoretical model is validated against the experimental penetration depths.