An example of dithering using random noise. Top to bottom: original gradient, quantised after dithering, quantised without dithering.
When shoes slide across a floor, wave-like deformations of the sole can generate squeaking. The pitch of the squeak depends on the rate at which deformations are generated.
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（三）不执行罚款决定与罚款收缴分离制度或者不按规定将罚没的财物上缴国库或者依法处理的；
公安机关应当将传唤的原因和依据告知被传唤人。对无正当理由不接受传唤或者逃避传唤的人，经公安机关办案部门负责人批准，可以强制传唤。
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