In the vector sensor array based passive sonar system, it is necessary to track multiple targets automatically.

在矢量阵被动声呐系统中，需要对多目标进行自动跟踪。

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According to the features of passive location systems, a new synthesis track initialization algorithm is presented based on passive location systems.

针对无源定位系统的特点，提出了一种基于无源定位系统的航迹综合起始算法。

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The traditional method of Kalman filter for passive sonar target track association is limited in practice.

传统的目标航迹关联方法卡尔曼滤波法在实际应用时有局限性。

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Kerkorian's track record is not as a passive investor.

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In a similar fashion, you can create a broadly diversified portfolio but choose an active management strategy instead of simply buying and holding to track the major indexes (which is passive management).

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Or you can be lazy about it, you can turn on passive tracking and just walk around with the app running and it will track your travels and plot your photos, comments and saved locations to the map, giving you an animated diary of your day.

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