浅谈装备技术状态控制与监督

装备技术状态控制是技术状态管理的重点与核心,贯穿于技术状态项目研制、生产全过程,也是军事代表开展技术状态管理监督的重点。本文主要对技术状态控制和监督的内容进行了介绍,并着重介绍了在控制和监督过程中应注意的几个问题。     

Monitoring the market or the salesperson? The value of information in a multilayer supply chain

We study a supply chain in which a manufacturer relies on a salesperson to sell the products to the consumers. The sales outcome is determined by a random market condition and the salesperson's service level, both of which are privately observed by the salesperson. Apart from them, there are two types of resellers: a knowledgeable reseller observes the market condition, whereas a diligent reseller can monitor the service level. While delegating to a reseller enhances information acquisition, it may also result in double marginalization and inefficiency. We identify several operating regimes in which double marginalization can be eliminated via simple contracts and establish the benefit of monitoring the salesperson over monitoring the market. Our dominance result is not prone to our model characteristics regarding the complementarity of market condition and sales effort, the relative importance of adverse selection and moral hazard, and the contract form. We then generalize our model and re‐establish the dominance result in the presence of reseller's risk aversion or private monitoring expertise. We also quantify the performance gaps among different selling schemes under various scenarios. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

基于变权的地空导弹抗干扰性能模糊综合评估

围绕地空导弹抗干扰性能评估问题,建立了模糊综合评估模型.针对传统模糊综合评估模型采用常权面临的突出问题,引入了变权的思想与方法,构建了基于变权的模糊综合评估模型.实例表明,相对于传统模型,采用基于变权的模糊综合评估模型,可以得出更加合理的评估结果.     

Does Health Spending Crowd out Defense in the United States? Evidence from Wavelet Multiresolution Analysis

Abstract

This study investigates the association between defense and health spending using multi-resolution analysis incorporating the structural change model. Our empirical results suggested that a negative correlation between defense and health spending persists over the entire period of 1941–2013 in the very long-run (over 16 years cycle), but there is a change in correlation between defense and health spending in the short-run (2–4 years cycle), medium-run (4–8 years cycle), and long-run (8–16 years cycle) during the same period. In particular, there appears to have been a trade-off relationship between defense and health spending during the ex-Korean War period, but there was a complementary relationship between defense and health spending during the post-Korean War period. The crowding-out effect of health spending on defense spending during the period when the Affordable Care Act was put into effect relies on the strength of the positive correlation in the long-run (8–16 years cycle) and negative correlation in the short-run (2–4 years cycle) and very long-run (over 16 years cycle).     

试论公安院校实验教学与人才培养

实验教学是培养学生实践能力和创新精神、提高其综合素质的重要环节。其中包括实验教学的总体目标、教学类型、教学内容、教学步骤、教学方法和质量测评等内容。     

美军军官晋升的若干特点

顺应新军事变革的发展趋势,美军在实践中不断改革和创新军官的晋升工作,采取有效的形式,建立了稳定的制度,形成了系统的观点,选拔任用了一大批高素质复合型的优秀军官。美军军官晋升中反映的一些基本特点,非常值得我们去深入地研究和把握。一、法规健全美军认为,法制化是从总体上防止军官晋升随意性的重要保证,必须不断推进军官晋升的法制化进程。国会、国防部和各军种都不遗余力,制定了种类繁多、覆盖广泛、层次齐全的军官人事管理法律法规和规章制度,为军官晋升提供了客观的依据、统一的标准和科学的指导。在基本法层面上,有国会通过的《…     

Cost allocation of capacity investment games

Consider a manufacturer serving a set of retail stores each of which faces deterministic demands in a finite planning horizon. At the beginning of the planning horizon, the production capacity of the manufacturer is built, followed by production, outsourcing to third party manufacturers if necessary and distribution to the retail stores. Because the retail stores are usually managed by different managers who act as independent profit centers, it is desirable that the total cost is divided among the retail stores so that their incentives can be appropriately captured and thus efficient operations can be achieved. Under various conditions, we prove that there is a fair allocation of costs among the retail stores in the sense that no subset of retail stores subsidizes others, or equivalently, the resulting capacity investment game has a nonempty core, that is, the capacity investment game is a balanced game. In addition, our proof provides a mechanism to compute a fair cost allocation. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 60: 512–523, 2013     

zn及Zn／Si02复合添加剂的摩擦学性能

实验室自制了锂基润滑脂,通过四球试验研究zn作为锂基润滑脂添加剂在不同工况条件的摩擦学性能,利用光学显微镜和EDX分析了磨斑表面形貌及元素组成,探讨了zn的润滑作用机理,并对zn与SiO2不同复配方案的摩擦学性能进行了研究。结果表明：在低载荷条件,zn能更显著地提高锂基润滑脂的抗磨性能;在中高载荷条件,zn同时具有减摩抗磨性能,但对Pn值的提高没有太大帮助。EDX能谱分析表明磨斑表面存在特征zn元素,说明zn能够在摩擦表面沉积,形成摩擦学性能显著的表面润滑层;同时,zn与硬质颗粒SiO2在适宜的复配比例时具有一定的协同效应,能提高锂基润滑脂的摩擦学性能．     

Experimental and numerical investigations of interface properties of Ti6Al4V/CP-Ti/Copper composite plate prepared by explosive welding

Explosive welding technique is widely used in many industries. This technique is useful to weld different kinds of metal alloys that are not easily welded by any other welding methods. Interlayer plays an important role to improve the welding quality and control energy loss during the collision process. In this paper, the Ti6Al4V plate was welded with a copper plate in the presence of a commercially pure titanium interlayer. Microstructure details of welded composite plate were observed through optical and scanning electron microscope. Interlayer-base plate interface morphology showed a wavy structure with solid melted regions inside the vortices. Moreover, the energy dispersive spectroscopy analysis in the interlayer-base interface reveals that there are some identified regions of different kinds of chemical equilibrium phases of Cu–Ti, i.e. CuTi, Cu₂Ti, CuTi₂, Cu₄Ti, etc. To study the mechanical properties of composite plates, mechanical tests were conducted, including the tensile test, bending test, shear test and Vickers hardness test. Numerical simulation of explosive welding process was performed with coupled Smooth Particle Hydrodynamic method, Euler and Arbitrary Lagrangian-Eulerian method. The multi-physics process of explosive welding, including detonation, jetting and interface morphology, was observed with simulation. Moreover, simulated plastic strain, temperature and pressure profiles were analysed to understand the welding conditions. Simulated results show that the interlayer base plate interface was created due to the high plastic deformation and localized melting of the parent plates. At the collision point, both alloys behave like fluids, resulting in the formation of a wavy morphology with vortices, which is in good agreement with the experimental results.