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计算段落SimHash不管设置多少位，结果都只有42位有效值，后面全部是0 #39

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lty2008one opened this issue Apr 10, 2023 · 3 comments
Open

计算段落SimHash不管设置多少位，结果都只有42位有效值，后面全部是0 #39

lty2008one opened this issue Apr 10, 2023 · 3 comments

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@lty2008one
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断点打到相似度计算中间发现的，simHash的每一个字符计算，最大位数也就只有42位，向量计算也就只有前42位有效，可能需要更换一下hash算法？
@shibing624
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限制了128位，如果文本短就用前面的位，文本长就继续加，最长表示到128位。

@lty2008one
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lty2008one commented Apr 14, 2023 •
edited

限制了128位，如果文本短就用前面的位，文本长就继续加，最长表示到128位。

我测试的结果是，文本会分词并计算每个分词的HASH值，同一位的HASH值会按照0减1加的趋势计算权重（好像权重全部都是1），最后得到的每一位按照正负判断为0还是1

但是每个分词的HASH值都超不过42位，最终的结果就绝对超不过42位啊

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@shibing624

@shibing624
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好的，所以是觉得42位的效果差，想改为128或者更长的位数吗？

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@shibing624 @lty2008one