公式： f(x)=λ⋅ELU(α,x)
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If the user does nothing harmful, the website delivers the requested service and nothing further happens. However, if the User abuses the site, the Resource will now ban the user by adding the pair (bsn, SN) to the banlist.
The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.