通过控制导航条的状态来跟踪和展示用户当前位置很困难，成本很大时，用它来替代标签。
Use instead of tabs when it would be prohibitively expensive to track and display the current location of the user as a state in the navigation control.
利用基准优化弹道参数和滑模控制思想，构造滑动面，提出了一种新的弹道跟踪制导规律。
Parameter of optimized trajectory and variable structure with sliding modes control theorem are used to construct sliding surface, obtain a new tracking trajectory guidance law.
适当地结合规划-跟踪算法和航迹角控制器可给再入制导带来极大的灵活性和适应性。
Proper combination of planning-tracking algorithm and FPA controller can bring great flexibility and adaptability to reentry guidance.
红外图像的检测、识别和跟踪技术是当前精确制导领域研究的关键技术之一。
The detection, recognition and tracking techniques are one of the key techniques in precise guidance. The research filed is widely studied.
复杂背景下的运动目标检测、识别和跟踪对红外成像制导系统具有重要意义。
Detecting, recognizing and tracking moving targets in cluttered background is important to IR imaging guidance systems.
本文综述了电视跟踪制导技术的现状和发展趋势。
This paper Outlines the current status and future development of TV tracking technology used in missile guidance.
红外弱小目标检测技术是红外搜索与跟踪、红外预警、红外制导等防御和武器系统中的核心技术之一。
Dim and small moving targets detection of IR sequence images is a key technique for the IR detection and tracking, alarming, guiding system.
它可以用来进行测距、精确跟踪、定位、制导、引信传感、飞船导航、气象测量、水下通讯和探测等。
It can be used for distance measuring, precision tracking, orientation, guiding, fuze sensing, meteorologic measure, underwater communication and detecting.
最后给出的软着陆跟踪制导实例，只需要测得斜向距离、速度和姿态角度信息。
Finally, an example of the following guidance law is presented, which needs only slant range, velocity and local vertical information.
低信噪（杂）比条件下运动点目标的检测、跟踪和识别技术是扩展制导武器系统作用距离，加强系统防御能力的关键技术之一。
Low observable small target detection, recognition and tracking algorithms are key technologies to extend the acceptance distance of guidance system and enhance the capacity of defense system.
星跟踪器是高精度和高灵敏度的导航和制导用传感设备，它利用天上的恒星为系统提供方向基准。
Star tracker is a sensing system with high accuracy and sensitivity in the guidance and navigation. It offers the direction reference to the aircraft and spacecraft by the use of the celestial stars.
星跟踪器是高精度和高灵敏度的导航和制导用传感设备，它利用天上的恒星为系统提供方向基准。
Star tracker is a sensing system with high accuracy and sensitivity in the guidance and navigation. It offers the direction reference to the aircraft and spacecraft by the use of the celestial stars.
应用推荐