Examining the Effects of Conformal Terrain Features in Advanced Head‐Up Displays on Flight Performance and Pilot Situation Awareness

Synthetic vision systems (SVS) render terrain features for pilots through cockpit displays using a GPS database and three‐dimensional graphical models. Enhanced vision systems (EVS) present infrared imagery of terrain using a forward‐looking sensor in the nose of an aircraft. The ultimate goal of SVS and EVS technologies is to support pilots in achieving safety under low‐visibility and night conditions comparable to clear, day conditions. This study assessed pilot performance and situation awareness (SA) effects of SVS and EVS imagery in an advanced head‐up display (HUD) during a simulated landing approach under instrument meteorological conditions. Videos of the landing with various HUD configurations were presented to eight pilots with a superimposed tracking task. The independent variables included four HUD feature configurations (baseline [no terrain imagery], SVS, EVS, and a combination of SVS and EVS), two visibility conditions, and four legs of the flight. Results indicated that SVS increased overall SA but degraded flight path control performance because of visual confusion with other display features. EVS increased flight path control accuracy but decreased system (aircraft) awareness because of visual distractions. The combination of SVS and EVS generated offsetting effects. Display configurations did not affect pilot spatial awareness. Flight performance was not different among phases of the approach, but levels and types of pilot SA did vary from leg to leg. These results are applicable to development of adaptive HUD features to support pilot performance. They support the use of multidimensional measures of SA for insight on pilot information processing with advanced aviation displays. © 2012 Wiley Periodicals, Inc.     

中央电视台奥运会体操外场TV Compound演播室系统简介

中央电视台奥运转播为了突出报道中国运动员的风采,在7个重点赛场除BOB提供公用信号外,还自己另外设立了直播系统,我们称之为TV Compound。本文重点介绍BOB提供外来信号最多的体操TV Compound系统的配置及使用情况。     

电动汽车牵引无限变速器的传动特性研究

设计了用于电动汽车传动系统的牵引无限变速器(TIVT).在分析其基本结构和工作原理的基础上,系统地分析了其核心部件的运动学和动力学特性,建立了传动比、滑动率、传递转矩和传动效率的数学模型,进而利用仿真软件ADMAS对其主要传动特性进行了分析研究和数值计算.结果表明,当输入转速不变时,输出转速随操纵环摆动角的变化而变化;当动力传动部件之间纯滚动或滑动率较小时,牵引无限变速器的传动效率较高,合理的设计可使传动效率达到99%.以某型号纯电动汽车为计算实例,其它条件完全相同时,匹配TIVT的电动汽车续驶里程较原车增加8.8km.     

基于ATMEG128与EVS100K的数字图像处理系统

本文分析了ARAMIS型CMOS图像传感器的结构模块和上作方式.针对图像产品微型化的趋势,提出了利用ATMEG128控制EVS100K完成图像数据采集的方法.文中描述了系统的硬件设计及EVS100K应用程序设计.     

具有行-列寻址功能摄像头模块

文中介绍具有行-列寻址功能的摄像头模块的开发。提出了利用CPLD控制EVS100K完成图像数据采集的方法。该模块可用于大多数的嵌入式系统中。     

EVS慢动作硬盘录像机的解析与应用

本文介绍了慢动作硬盘录像机产生的背景，对EVS LSM硬盘录像横的工作方式，特点进行说明，并介绍了EVS LSMHCT4硬盘录像机的特性和EVS LSM硬盘录像机在节目制作中的应用。     

Parameter estimation of the generalized extreme value distribution for structural health monitoring

Structural health monitoring (SHM) can be defined as a statistical pattern recognition problem which necessitates establishing a decision boundary for damage identification. In general, data points associated with damage manifest themselves near the tail of a baseline data distribution, which is obtained from a healthy state of a structure. Because damage diagnosis is concerned with outliers potentially associated with damage, improper modeling of the tail distribution may impair the performance of SHM by misclassifying a condition state of the structure. This paper attempts to address the issue of establishing a decision boundary based on extreme value statistics (EVS) so that the extreme values associated with the tail distribution can be properly modeled. The generalized extreme value distribution (GEV) is adopted to model the extreme values. A theoretical framework and a parameter estimation technique are developed to automatically estimate model parameters of the GEV. The validity of the proposed method is demonstrated through numerically simulated data, previously published real sample data sets, and experimental data obtained from the damage detection study in a composite plate.     

十运会开幕式及田径比赛电视转播系统构成

大型活动电视转播系统常常需要多个系统级联才能完成，在系统级联时常常会出现系统之间通话、信号切换指标以及播出信号监看等问题。本文阐述了十运会开幕式及田径比赛电视转播时对于上述问题的解决办法。     

EVS LSM-XT硬盘系统在高标清兼容演播室的应用

介绍了EVS LSM-XT相关操作,结合高标清兼容演播室的特有情况,探讨了标清配置的EVS LSM-XT设备在大型综艺节目录制过程中的具体应用.     

从亚运花游慢动作制作谈中小系统的EVS配置

作为一名视频系统工程师,本人有幸参加了2010广州亚运会乒乓球和花样游泳两个项目的制作.在比赛期间,本人主要负责乒乓球2号台和花样游泳的慢动作即时回放,精彩集锦(Highlight)和5分钟赛事精彩回顾(Melt Reel)的制作.下面就介绍一下本人在这次亚运赛事制作中对于花样游泳转播中的EVS使用的心得体会.希望能对...