华小电

摘要： 1. 连接数据库2. 授权并刷新权限grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;flush privileges;3. 查看用户数据 use mysqlselect user 阅读全文

摘要： 1. 合并,提取音视频 (1)单独提取视频（不含音频流） ffmpeg -i video.mp4 -vcodec copy -an video_silent.mp4 -an：表示不输出音频 (2)单独提取音频（不含视频流） ffmpeg -i input.mp4 -vn -ar 44100 -ac 阅读全文

摘要： 1. Debian 上安装 sudo apt-get install gerbera 2. 打开UI界面 默认是关闭的，配置文件/etc/gerbera/config.xml，把enabled改为'yes' <config> <server> <ui enabled="no" show-toolti 阅读全文

摘要： batch_size , seq ,num_layers = 2,3,2 input_size , hidden_size = 2,3 input = torch.randn(batch_size, seq, input_size) h_0 = torch.zeros(num_layers,batc 阅读全文

摘要： rnn = nn.RNN(input_size=4,hidden_size=3,num_layers=2,batch_first=True, bidirectional = True) input = torch.randn(1,5,4) output , h_n = rnn(input) prin 阅读全文

摘要： batch_first – If True, then the input and output tensors are provided as (batch, seq, feature) instead of (seq, batch, feature). Note that this does n 阅读全文

摘要： # Define LSTM class Lstm(nn.Module): def __init__(self, input_size, hidden_size=2, output_size=1, num_layers=1): super().__init__() self.layer1 = nn.L 阅读全文

摘要： x=np.arange(1,100) y = np.sin(0.1*x) def D_1(x,y): n = len(x) d = np.zeros(n) d[0] = (y[1]-y[0])/(x[1]-x[0]) d[n-1] = (y[n-1]-y[n-2])/(x[n-1]-x[n-2]) 阅读全文

摘要： x = [1,2,3] y1 = np.array([4,5,6]) y2 = np.array([5,6,7]) y3 = np.array([7,6,5]) width = 0.2 Sum = y1+y2+y3 per = 100*y2/Sum #添加在中间，旋转90度 def add_mid( 阅读全文

摘要： ```python def firstorder(T,K,t,In): # T 时间常数 # K 增益 Out = np.zeros(len(In)) for i in range(1,len(t)): dt = t[i]-t[i-1] s = T/dt Out[i] = K*In[i]/(s+1) 阅读全文