What is Inverse document frequency

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A numerical statistic used to reflect how important a word is to a document in a collection or corpus. It is often used as a weighting factor in information retrieval and text mining. The tf-idf value increases proportionally to the number of times a word appears in the document, but is offset by the frequency of the word in the corpus.

Other related questions:
Wildcard for the USG2000&5000
The wildcard is the reverse bits of the obverse mask. For example, mask 255.255.255.0 of network C is expressed as 1111111111111111 11111111 00000000 in binary format. Conversely, the binary format is displayed as 00000000 00000000 00000000 11111111. Accordingly, the wildcard in decimal format is 0.0.0.255. In an ACL, the wildcard is adopted for matching IP addresses, whereas the obverse mask is adopted for matching MAC addresses.

What is the working frequency of the TE20?
Working frequency: 50 Hz to 60 Hz

What is the working frequency of the TE10?
Working frequency of the TE10: 50 Hz to 60 Hz

Image inversion fails on the VPC520
The possible causes and solutions. Cause1: The FLIP mode on the camera is not set to ON. Solution: Set FLIP to ON and press SET to save the setting. Cause2: The video output format is 1080p 50/60 fps. Solution: If the video output format is 1080p 50/60 fps, image inversion is disabled.

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