A method and device for detecting brush measurement tools
A detection method and tool technology, applied in the network field, can solve limitations and other problems, and achieve the effect of avoiding limitations
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[0031] Before introducing the application scheme, first explain the names or phrases used in the text:
[0032] SimHash is a dimensionality reduction technology that can map high-dimensional vectors to one-dimensional fingerprints. It was first proposed by Google for deduplication of web pages. The input of the SimHash algorithm is a vector, and the output is an f-bit fingerprint. For the convenience of presentation, it is assumed that the input is a feature set of user behavior, and each feature has a corresponding weight. The SimHash algorithm is as follows:
[0033] 1. Initialize a vector V of f dimension (where f is 64) to 0, and initialize the binary number S of f bits to 0;
[0034] 2. For each feature: use the traditional hash algorithm to generate an f-bit fingerprint b for this feature, for i=1 to f, if the i-th bit of b is 1, add this feature to the i-th element of V The weight of (here the weight is 1); otherwise, the i-th element of V minus the weight of the feat...
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