虚拟现实技术在美军实战化训练中的应用及启示

虚拟现实技术应用于军事领域,给军事训练带来了又一场革命。文章立足军队当前实战化训练背景,在分析虚拟现实技术及其特征的基础上,通过对虚拟现实技术在美军实战化训练中的应用现状分析,提出虚拟现实技术应用于我军实战化训练的发展对策。     

越南卫星现状及未来发展

卫星具有覆盖范围广、可长时间稳定运行、无国界限制、安全性高等独特优势,是提升部队作战效能的＂倍增器＂,也是解决大范围战场信息支撑能力问题的有效手段和最佳途径。21世纪初,高速增长的经济推动越南航天事业驶入了发展的快车道,不仅实现了卫星发射的零突破,还相继发射了多颗通信卫星、遥感卫星和试验型纳卫星。文章主要对越南当前的卫星现状进行总结归纳,并分析其未来的发展计划。     

电工与电子技术实验教学改革探索

针对传统电工与电子技术实验教学存在的问题,分析实验教学改革的必要性,提出实验教学改革的目的,并从实验教学体系、教学模式、项目设置、考核方式几个方面进行了探索与研究,以使实验教学更加符合培养认知能力强、综合素质高、具有创新能力人才的培养目标.     

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。     

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.     

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.     

超低能耗建筑的实践探索——以后勤工程学院绿色建筑示范楼为例

后勤工程学院绿色建筑示范楼是“超低能耗”理论的实践成果。通过理论研究和对当地气候以及建筑能耗的现状分析,综合采用自然通风采光技术、墙体自保温技术、建筑自遮阳设计等被动式节能技术,地源热泵应用、太阳能利用、楼宇智能控制等主动式节能技术,对示范楼进行了设计、建造。经过两年多的使用,各项节能数据的测定表明：示范楼节约能耗75．4％,实现了公共建筑超低能耗的节能要求。     

鱼雷外形参数化建模平台研究

鱼雷外形建模是鱼雷设计过程中非常重要的一项工作环节.传统的鱼雷外形建模方法仅仅是利用了CAD绘图软件进行手动建模,但是在鱼雷外形初步设计过程阶段,往往需要对设计参数进行多次调整,这就造成了参数一旦调整就要重新建模,既降低了效率,也浪费了大量的人力和时间.采用了基于Java环境开发的参数输入界面,同时与UG/OPEN二次开发技术相结合,完成鱼雷外形参数化建模平台的搭建,开发出了较为简单方便的鱼雷外形参数化建模的方法,大大提高了鱼雷外形建模的效率.