末端防御作战中火控雷达组网系统应用研究

火控雷达组网是应对未来末端防御作战挑战的有效途径。提出了基于指挥信息系统的火控雷达组网方式,并分析了该方式的优势。继而基于末端防御战斗部署一般要求和火控雷达组网系统对空侦察配系的特殊要求,经仿真计算得出和分析了火控雷达组网系统的典型对空侦察配系。最后详细论述了火控雷达组网系统的指挥控制要点。研究结果对于促进末端防御部队形成以信息系统为核心的体系作战能力具有重要意义。     

计算机科学与技术专业课程体系的建设与实践

计算机科学与技术专业是一门随着社会、经济、科技的飞速发展而不断更新的学科,为了培养具有开拓、创新、适应社会发展的高素质工程应用型人才,我们必须不断加强计算机科学与技术专业的课程体系建设。本文结合我校计算机科学与技术专业教学和应用现状,通过建立良好的课程体系,使课程教学能更系统、更具目的性;同时将实践教学摆到了重要的位置,注重课程体系的组织与学生能力培养和素质提高的密切结合。     

Strategic outsourcing under technology spillovers

We study a supply chain in which an original equipment manufacturer (OEM) and a contract manufacturer (CM) compete in the finished goods market. The OEM can decide whether to outsource the intermediate good, a critical component for producing the finished good, from the CM or make in‐house production. Technology transition improves the CM's production efficiency, and it can take two different forms: a direct technology transfer from the OEM to the CM or technology spillovers through outsourcing from the OEM to the CM. We document the possibility of strategic outsourcing, that is, the CM supplies the intermediate good to the OEM when she is less efficient than the OEM's in‐house production. We find that technology spillovers can strengthen the incentive for strategic outsourcing. Furthermore, compared with direct technology transfers, outsourcing coupled with technology spillovers may generate more technology transition. Outsourcing is a particularly appropriate channel for implicit collusion when the OEM is not very efficient with the production of the intermediate good. Our results suggest that ex post competition on the finished goods can create room for ex ante collaboration and provide some implications on the OEM's outsourcing strategies when facing a competitive CM.© 2014 Wiley Periodicals, Inc. Naval Research Logistics 61: 501–514, 2014     

基于嵌入式Web的HART仪表远程控制系统

为解决有线HART仪表在恶劣环境中远程传输时易受影响、成本高等问题,结合嵌入式linux系统在远程工业控制中的应用,提出了一种基于嵌入式Web的HART仪表远程控制系统。采用S3C2440处理器和DM9000网络芯片,在嵌入式系统上移植Boa Web服务器,并运用CGI技术实现动态网页控制。利用该控制系统,客户只需在室内通过浏览器即可对HART仪表进行远程监控,且不需要专门的组态软件。     

基于流量均衡和跨层技术的星群路由算法

针对分布式星群网络业务通信QoS不高的问题,提出了一种基于流量均衡和跨层技术的分布式星群网络路由算法(TACA)。该算法首先通过跨层技术将物理层、MAC层的相关信息搜集起来,作为判断链路负载状况的依据;然后对不同类型的业务进行分类,根据链路负载状况和业务QoS级别选择不同的路由层次,从而均衡流量以提高QoS。仿真表明,该路由算法在一定程度上降低了星群的呼叫阻塞率和切换阻塞率,平衡了网络的负载,提高了网络吞吐量。     

特征保持的视点相关三维矢量场流线简化方法

为了解决三维矢量场可视化中流线数量过多造成的遮挡与视觉混乱问题,同时保证流线能够准确描述矢量场变化规律与重要特征,提出了一种基于特征保持的视点相关三维矢量场流线简化方法。采用粒子跟踪生成3D矢量场流线集,并进行视点相关映射;对流线集进行特征保持计算;基于流线视觉效果度量对流线集进行迭代简化计算,从而实现流线集的有效简化。实验结果表明,能够有效保持矢量场的物理特征,且具有较好的流线视觉效果。     

Offsets as industrial policy: Lessons from aerospace

Since 1975 “offsets” have begun to appear frequently in contracts covering international sales of aircraft and other products incorporating advanced technology. Offsets involve reciprocity beyond that normally found in an exchange of goods for money. They may involve co‐production or co‐design of the principal item to be exchanged, or acceptance by the seller of goods or services unrelated to it as partial payment (indirect offsets or countertrade).

The United States has become the major provider of offsets and anti‐offset sentiment has grown. Economists interpret them as trade diverting. Politicians from regions suffering loss of employment view them as bestowing unfair advantage to foreign competitors.

The authors examine offsets from both theoretical and policy perspectives and conclude that in such noncompetitive markets, second‐best considerations dominate, requiring case‐by‐case evaluation of impacts and rendering across‐the‐board determinations of welfare loss suspect.     

Defence R&D expenditure: The crowding-out hypothesis

The impact of defence expenditure on the economy has been widely studied through different types of models. However, the results from these studies have not reached definitive conclusions, and have left a gap in the analysis of the impact of defence R&D expenditure at the economy level. Defence R&D has specific characteristics, which lead to market failures: public good, high risk and uncertainty, national security. Also, defence R&D creates two types of externalities: negative (crowding-out), and positive (spin-off). Crowding-out is the major economic debate about defence R&D. This paper analyses the crowding-out hypothesis by applying three types of models for the UK case: supply, demand, and demand-supply models. From these three models the most reliable is chosen and applied to the individual cases of France, Germany, Japan and USA. The paper also reports the results for the pooled data of these five countries, and for four error component models. The results from estimating such models shed light on the defence R&D crowding-out hypothesis.     

ON THE CHOICE OF MULTI-TASK R&D DEFENSE PROJECTS: A CASE STUDY OF The ISRAELI MISSILE DEFENSE SYSTEM

Investments in R&D constitute a major share of the expenditures of the hi-tech industry since, generally, they enable firms to successfully compete in the rapidly and constantly changing markets for hi-tech products and services. The role of R&D projects is particularly important in the areas of defense and homeland security due to the nature of warfare and the continuous threats posed by arms races and by terror organizations. This study analyzes the choice of the R&D projects designed to counter multiple related military threats. It develops the methodology required to assess whether it is preferable to develop one project to thwart several related threats, or several distinct projects, each of which provides an answer to one specific threat or a partial set of the threats. An analytic solution is provided and assessed for two simple models with two related threats. A solution of the model is then provided for any number of related threats, using a dynamic programming methodology. Finally, we demonstrate the usefulness of our model and methodology to Israel’s missile defense problem; that is, we show how to optimally develop systems aimed at thwarting the multiple threats of short-, medium-, and long-range missiles.     

The “yellow rain” controversy: Lessons for arms control compliance

Indonesia, Thailand, and Vietnam recently announced that they are launching nuclear energy programs, and Malaysia and the Philippines soon may follow suit. As a result, by 2020, at least three states in Southeast Asia could possess latent nuclear capabilities—the option to pursue military applications of dual-use nuclear technology. Analysis of the nuclear programs, domestic proliferation pressures, and the external threat environment in Southeast Asia leads the authors to conclude that the nuclear intentions of states in that region are entirely peaceful and the probability of future nuclear breakout there is low. However, this finding does not justify complacency. In the long term, the benign outlook for regional security may change, and in the near term weak regulatory regimes present serious challenges to nuclear safety and create opportunities that non-state actors may exploit. To minimize these risks, the authors recommend creating a “proliferation firewall” around the region, which would combine strong global support for Southeast Asian nuclear energy programs with innovative regional multilateral nuclear arrangements.