跟踪

The techniques for obtaining initial tracing points and tracing intersection branches are the most important issues in surface intersection algorithm. This paper reviews the plane vector field method which is exploited to get initial tracing points,and gives the relation between normal curvature and tracing direction.

平面向量场与曲率分析在曲面求交中的应用宁涛，马德昌，王亚平，唐荣锡（北京航空航天大学制造工程系北京100083）摘要在曲面求交算法中，初始跟踪点的确定和交线分支的跟踪是最关键的两个问题。

In this dissertation, we combined maneuver detection and extended Kalman filtering under polar coordinates to solve this problem.

本文将机动检测与基于极坐标系下的扩展卡尔曼滤波结合，解决了被动跟踪算法只能跟踪匀速直线运动目标的问题。

On the condition that the primary optical axis of the seeker was fixed to the missile top, the expressions of imaging compensation were educed by analyzing imaging laws of the moving target relative to the rotating seeker. An estimation algorithm based on the coupling image was used to realize real-time tracking for the angle velocity. After discussing some relative problems such as glint and fabric noises, a filter based on wavelet decomposition and weighted smoothness was utilized.

通过分析目标相对于旋转导引头的成像规律，推导出图像反旋补偿的公式，研究了基于图像的角速度估计算法，实现了对自旋角速度的实时跟踪；同时对成像过程中产生的闪烁噪声、抖动噪声等进行了分析，并在角速度跟踪时，采用基于小波滤波与加权平滑的方法进行去噪处理。

The most primitive function of the channels, you need to manually modify Adsense labels to every definition you want to track advertising unit, many Adsense publishers of this are quite critical, and now, Google has released a URL channel function, and this change tracking more easily.

最原始的渠道功能，需要你手动地修改 Adsense 标签来定义每一个你想跟踪的广告单元，很多 Adsense 发布商对此都颇有微词，现在， Google 已经发布了URL渠道功能，这让跟踪变得更容易了。

Aiming at complicated computing and difficulty of being realized when extending single sensor PHD filtering to the multi-sensor case by means of probability generating function, a multi-sensor multi-target sequential particle-PHD tracking algorithm is proposed based on the thought of sequential filtering for a centralized fusion system. The algorithm chooses the importance density function with regard to every sensor, and updates sample particle of every sensor layer by layer.

当采用概率母函数将单传感器PHD滤波推广到多传感器情形时，针对计算繁琐，难于实现的问题，本文基于集中式融合系统的有序滤波思想，提出多传感器、多目标有序粒子PHD跟踪算法，该算法通过选取与各传感器相关的重要性密度函数，层层更新各传感器的采样粒子，达到多传感器多目标有序PHD跟踪。

The missile racker is mounted alongside the operator is tracking telescope and is collimated to it .

导弹跟踪装置与跟踪望远镜装在一起，且对它加以平行校准。

Based on Image Theory and tube-tree method, an applicable ray tracing method based on virtual source tree was presented in this paper.

本文在参照了镜像法、射线管法等射线跟踪思想的基础上，提出了一种有效的基于虚拟源树的射线跟踪模型。

In the field of target tracking, tracking reentry vehicles based on radar information is a highly complex problem in nonlinear filtering.

在目标跟踪领域中，根据雷达测量的信息对再入来袭飞行器进行跟踪是一个很复杂的非线性滤波问题。

A scheme of adaptive sliding-mode robust tracking control based on sliding mode equivalent control and robotic dynamics regressor is put forward and globally asymptotic stability of robotic trajectory tracking control systems designed by adopting the presented controller is proved.

基于滑模等价控制的理论和机器人动力学回归模型，提出了一种机器人自适应滑模鲁棒跟踪控制方法，证明了采用这种控制器所设计的机器人轨迹跟踪控制系统是全局渐近稳定的。

It is proved that the"feedback linearization" certainty equivalence control law with"regressor vector-based"update law can guarantee the real output to track reference output in relative degree one case.

当控制对象的相对阶为1时，我们证明了采用"反馈线性化型"确定性等价控制律，和"基于回归向量"的自适应律，可以保证实际输出有界跟踪参考输出；当控制对象的相对阶大于1时，控制律和自适应律的结构保持不变，但是构造自适应律的信号采用了由跟踪误差得来的"增广误差"。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。