int n = sizeof(arr)/sizeof(arr[0]);
В России ответили на имитирующие высадку на Украине учения НАТО18:04
，这一点在safew官方下载中也有详细论述
激活函数的作用 激活函数在每个神经元输出前进行非线性变换，让网络可以拟合复杂的函数关系，从而解决分类、回归等非线性问题。
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.
Mean SSIM understates the threat. Max same-font SSIM reveals it.