The recreateIt() method re-creates the object, but it is referenced by a WeakReference, not a strong reference.
recreateIt() 方法将重新创建该对象，但它会被 WeakReference 引用，而不是强引用。
This method is applicable not only to non-polar and slight polar liquids, but also to strong polar and associated liquids.
本法不仅适用于非极性和弱极性液体，而且也适用于强极性和缔合液体。
While the CFAR method only using the local contract information is not symmetric, it has a high false alarm in the strong clutter environment.
而CFAR检测方法只利用了目标的局部对比度信息，不存在负值效应，但在强杂波环境中的检测结果存在很高的虚警。
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