共查询到19条相似文献,搜索用时 203 毫秒
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本文结合现代航空电子系统的发展情况,介绍了典型第四代战斗机-美国的F-22“猛禽”战斗机的技战术特点、综合化航空电子体系结构以及主要设备的功能和性能等,并提出了研究和发展建议。 相似文献
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F-35“联合攻击战斗机”项目是美国国防部于20世纪90年代中期发起的最大项目计划,不
仅代表着新的研制、生产和编队维护方式,而且还采用创新方法实现飞机和整个编队在寿命
周期内的协同升级。在概略介绍基本型F-35具备的9大关键特性的基础上,重点分析了座舱
、先进的传感器数据融合、可管理的飞行员工作负荷、通用作战图像和软件的可升级性等方
面,最后,总结了F-35“闪电 II”战斗机的创新之处。 相似文献
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如果飞行模拟游戏十分感兴趣,即使你是一个初学者,也能够从这个《MIG-29支点》,《F-16多用途战斗机》飞行模拟游戏套装开始自己的飞行生涯。对于“老飞行员”而言,驾驶MIG-29或者F-16与其他同道在一体化战场上进行较量,也是—件赏心乐事。无论从哪方面来说,这个飞行模拟游戏套装都是值得珍藏的产品。 相似文献
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在分析未来战斗机面临的空中作战特点以及战斗机航空电子系统发展现状的基础上,根据未来信息化战争对航空电子系统发展需求的重大变化,提出未来战斗机航空电子系统在完成从"三代综合化"向"四代综合化"的转变以后,重点是朝着"网络化"方向发展的观点,并重点分析外军为实现这种网络化所采取的技术措施。 相似文献
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为解决大规模分布式异构实时处理平台在航空电子模块化综合条件下的体系结构问题,在分析联合标准化航电系统架构特点的基础上,提出一种基于串行RapidIO硬总线和虚通道软总线互连的开放式系统架构,并完成一套基于该架构的综合化信号与信息处理机,实现了真正意义上的芯片级互连、低延时、多节点、可扩展、可重构的航空电子综合化应用平台。 相似文献
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以复合材料无人机的航电系统为研究对象,根据无人机整体设计要求,设计满足需
求的航电系统。该系统以自动驾驶仪为控制核心,采用内部集成的A/D转换器采集工作电压
,实时监测无人机的电源电压;内部集成的姿态测量系统和INS/GPS组合导航系统,采集无
人机的姿态与位置数据;通过串口与无线数据电台相连,实现无人机与地面控制站之间的通
信;通过I/O口连接超声波测距仪,实时测量无人机与地面的相对高度;其输出的RS485控制
信号与各个舵机等执行部件相连,实现对无人机执行部件的控制。该复合材料无人机的航电
系统功能齐备,采用模块化设计,接口方便。在此硬件平台上开发控制算法,可满足本复合
材料无人机系统的工作要求。此外,给出了航电各子系统间的布局、电缆敷设的优化方法,
并对航电系统联合调试需要注意的问题进行了讨论。 相似文献
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我国的合同法对代位权的客体做出了明确的限定,这使得代位权制度在实际运用中碰到了一些困难,本文对代位权的客体和抵押权能否成为代位权的客体进行了分析和探讨。 相似文献
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The German 10‐year Bund futures contract traded on the Eurex futures and options exchange in Frankfurt became the world's most actively traded derivative product by the end of 1999. In this article, we provide a detailed exploration of the interday and intraday return volatility in the Bund futures contract using a sample of five‐min returns from 1997 to 1998. The evolution of interday volatility is described best by a MA(1)‐fractionally integrated process that allows for the long‐memory features. At the intraday level, we find that macroeconomic announcements from both Germany and the U.S. are an important source of volatility. Among the various German announcements, we identify the IFO industry survey of business climate, industrial production (preliminary), and Bundesbank policy meeting as being by far the most important. The three most significant U.S. announcements include the employment report, the National Association of Purchasing Managers (NAPM) survey, and employment costs. Overall, U.S. macroeconomic announcements have a far greater impact on the Bund futures market than their German counterparts. © 2002 Wiley Periodicals, Inc. Jrl Fut Mark 22:679–696, 2002 相似文献
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陆军装备信息化建设对战场信息系统的指挥控制、态势感知、部队跟踪等能力提出了更高的要求。从美陆军利用战场应用软件加速其装备现代化转型的发展动因出发,总结了美陆军战场应用软件的发展现状,分析了目前正在发展的典型项目及其技术难点,包括战术应用软件、任务指挥软件套件、态势感知与指控软件。在此基础上,指出软件应用是陆军战场信息系统摆脱“烟囱式”架构、保持新技术同步的一种有效发展途径。 相似文献
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《Journal of Marketing Channels》2013,20(4):43-64
This study investigates what factors affect foreign manufacturing subsidaries' channel choice, that is, the selection between integrated channels and independent distributors for their products in the U.S. market. The results of a logit analysis with 172 foreign-owned subsidiaries as a sample show that the product's transaction-specific assets are the most important factor explaining the use of integrated channels. Additionally, sales size, the time the product has been on the market, and the experience of operating in the United States were found to be significant factors. However, the home country nationality does not appear to affect significantly the channel selection of a foreign firm in the U.S. market. 相似文献
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联合标准化航电系统架构协会(ASAAC)定义了先进航空电子体系结构(A3)的开放式标准、概念和指导原则,该标准和指导原则主要用于2005年以后新的飞机项目和现有飞机的升级计划。ASAAC标准定义了综合模块化航空电子系统(IMA),该标准是为了建立一个统一的IMA体系结构。IMA由通用的组件构成,这些组件可以在单独的标准中定义和说明。针对ASAAC标准定义的航电系统顶层体系架构,概述了该架构的一些设计指导原则,同时简要介绍了IMA架构。 相似文献
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Social Sharing of Online Videos: Examining American Consumers’ Video Sharing Attitudes,Intent, and Behavior 下载免费PDF全文
The present study integrated the theory of planned behavior, technology acceptance model, and Palka et al.'s (2009) viral marketing model to examine U.S. consumers’ online video sharing attitudes, intent, and behavior. Two online surveys of 318 U.S. college students and 370 U.S. general consumers were conducted consecutively in April 2012 and May 2012 to strengthen the study's reliability and validity. Results show that perceived pleasure and cost served as important predictors of online video sharing attitudes among college students and general consumers. Their intent to share online videos was predicted by perceived pleasure and normative influences, attitudes, and social media use. The number of online videos they shared was determined by online video consumption, intenteh, normative influences, and social media use. Sharing of online videos is different from sharing other online content in that perceived utilities and behavioral control do not really matter. The findings carry important implications for academic researchers, online marketers, and video publishers. 相似文献