{"id":30030,"date":"2024-10-28T03:19:14","date_gmt":"2024-10-28T03:19:14","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=30030"},"modified":"2024-11-26T06:50:21","modified_gmt":"2024-11-26T06:50:21","slug":"%eb%94%a5%eb%9f%ac%eb%8b%9d-%ed%8c%8c%ec%9d%b4%ed%86%a0%ec%b9%98-%ea%b0%95%ec%a2%8c-%eb%94%a5%eb%9f%ac%eb%8b%9d%ec%9d%b4%eb%9e%80","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/30030\/","title":{"rendered":"\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c, \ub525\ub7ec\ub2dd\uc774\ub780"},"content":{"rendered":"<p><body><\/p>\n<p>\ub525\ub7ec\ub2dd\uc740 \uc778\uacf5\uc9c0\ub2a5(AI)\uacfc \uba38\uc2e0\ub7ec\ub2dd(ML)\uc758 \ud55c \ubd84\uc57c\ub85c, \uc778\uac04\uc758 \ub1cc \uad6c\uc870\ub97c \ubaa8\ubc29\ud558\uc5ec \ub370\uc774\ud130\uc5d0\uc11c \ud2b9\uc9d5\uc744 \ud559\uc2b5\ud558\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ud559\uc2b5 \uacfc\uc815\uc744 \ud1b5\ud574 \ucef4\ud4e8\ud130\uac00 \uc0ac\ub78c\uacfc \ube44\uc2b7\ud558\uac8c \uc778\uc2dd\ud558\uace0 \ud310\ub2e8\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4.<\/p>\n<h2>1. \ub525\ub7ec\ub2dd\uc758 \uc5ed\uc0ac<\/h2>\n<p>\ub525\ub7ec\ub2dd\uc758 \uac1c\ub150\uc740 1940\ub144\ub300\uc640 1950\ub144\ub300\uc5d0 \uae30\uc6d0\ud569\ub2c8\ub2e4. \uc774 \uc2dc\uae30\uc5d0 \ud37c\uc149\ud2b8\ub860(Perceptron)\uc774\ub77c\ub294 \uc2e0\uacbd\ub9dd \uae30\ubc95\uc774 \uc81c\uc548\ub418\uc5c8\uace0, \uc774\ub294 \uae30\uacc4\uac00 \ud559\uc2b5\ud560 \uc218 \uc788\ub294 \uac04\ub2e8\ud55c \ubaa8\ub378 \uc911 \ud558\ub098\uc600\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ucd08\uae30\uc758 \ud55c\uacc4\ub85c \uc778\ud574 \ub525\ub7ec\ub2dd\uc740 \ud55c\ub3d9\uc548 \uc8fc\ubaa9\ubc1b\uc9c0 \ubabb\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<p>1990\ub144\ub300\uc5d0 \ub4e4\uc5b4\uc11c\uba74\uc11c, \ub2e4\uce35 \ud37c\uc149\ud2b8\ub860(Multi-layer Perceptron)\uacfc \uc5ed\uc804\ud30c(Backpropagation) \uc54c\uace0\ub9ac\uc998\uc758 \ubc1c\uc804\uc774 \uc788\uc5c8\uc2b5\ub2c8\ub2e4. 2000\ub144\ub300 \uc774\ud6c4\uc5d0\ub294 \ub370\uc774\ud130\uc758 \uc591\uc774 \ud3ed\ubc1c\uc801\uc73c\ub85c \uc99d\uac00\ud558\uace0, GPU\uc758 \ubc1c\uc804\uc73c\ub85c \uc778\ud574 \ub525\ub7ec\ub2dd\uc774 \ub2e4\uc2dc \uc8fc\ubaa9\uc744 \ubc1b\uae30 \uc2dc\uc791\ud588\uc2b5\ub2c8\ub2e4. \ud2b9\ud788, 2012\ub144 ImageNet \ub300\ud68c\uc5d0\uc11c AlexNet\uc774 \ubc1c\ud45c\ub418\uba74\uc11c \ub525\ub7ec\ub2dd\uc758 \uc778\uae30\uac00 \uae09\uc99d\ud558\uc600\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>2. \ub525\ub7ec\ub2dd\uc758 \uae30\ubcf8 \uac1c\ub150<\/h2>\n<p>\ub525\ub7ec\ub2dd\uc5d0\uc11c\ub294 \uc5ec\ub7ec \uac1c\uc758 \uce35(level)\uc73c\ub85c \uad6c\uc131\ub41c \uc778\uacf5\uc2e0\uacbd\ub9dd\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uac01 \uce35\uc758 \ub178\ub4dc\ub294 \uc785\ub825 \ub370\uc774\ud130\uc758 \ud2b9\uc9d5\uc744 \ubcc0\ud658\ud558\uace0 \ub2e4\uc74c \uce35\uc5d0 \uc804\ub2ec\ud569\ub2c8\ub2e4. \ub9c8\uc9c0\ub9c9 \ucd9c\ub825\uce35\uc5d0\uc11c\uc758 \uacb0\uacfc\ub294 \uc608\uce21\uac12\uc73c\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<h3>2.1 \uc778\uacf5\uc2e0\uacbd\ub9dd \uad6c\uc870<\/h3>\n<p>\uc778\uacf5\uc2e0\uacbd\ub9dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uae30\ubcf8 \uad6c\uc870\ub97c \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\uc785\ub825\uce35(Input Layer):<\/strong> \ubaa8\ub378\uc774 \ub370\uc774\ud130\ub97c \ubc1b\uc544\ub4e4\uc774\ub294 \uce35\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>\uc740\ub2c9\uce35(Hidden Layer):<\/strong> \uc785\ub825\uce35\uacfc \ucd9c\ub825\uce35 \uc0ac\uc774\uc5d0 \uc704\uce58\ud558\uba70, \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ucd9c\ub825\uce35(Output Layer):<\/strong> \ubaa8\ub378\uc758 \ucd5c\uc885 \uacb0\uacfc\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>2.2 \ud65c\uc131\ud654 \ud568\uc218(Activation Function)<\/h3>\n<p>\ud65c\uc131\ud654 \ud568\uc218\ub294 \uac01 \ub178\ub4dc\uc5d0\uc11c \uacc4\uc0b0\ub41c \uacb0\uacfc\ub97c \ub2e4\uc74c \uce35\uc73c\ub85c \uc804\ub2ec\ud558\uae30 \uc804\uc5d0 \ube44\uc120\ud615\uc131\uc744 \ubd80\uc5ec\ud558\ub294 \ud568\uc218\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \ud65c\uc131\ud654 \ud568\uc218\uc5d0\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uac83\ub4e4\uc774 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\uc2dc\uadf8\ubaa8\uc774\ub4dc(Sigmoid):<\/strong> \ucd9c\ub825 \ubc94\uc704\uac00 0\uacfc 1 \uc0ac\uc774\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>ReLU(Rectified Linear Unit):<\/strong> 0\ubcf4\ub2e4 \uc791\uc740 \uac12\uc740 0\uc73c\ub85c \ubcc0\ud658\ud558\uace0, \ub098\uba38\uc9c0 \uac12\uc740 \uadf8\ub300\ub85c \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>Softmax:<\/strong> \ub2e4\uc911 \ud074\ub798\uc2a4 \ubd84\ub958 \ubb38\uc81c\uc5d0\uc11c \uc8fc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>3. \ud30c\uc774\ud1a0\uce58(PyTorch)\uc758 \uc18c\uac1c<\/h2>\n<p>\ud30c\uc774\ud1a0\uce58\ub294 \ub525\ub7ec\ub2dd \ubaa8\ub378\uc744 \uad6c\ud604\ud558\ub294 \ub370 \ub110\ub9ac \uc0ac\uc6a9\ub418\ub294 \uc624\ud508\uc18c\uc2a4 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc785\ub2c8\ub2e4. \uc5f0\uad6c\uc640 \ud504\ub85c\ub355\uc158 \ubaa8\ub450\uc5d0 \uc801\ud569\ud558\uba70, \uac15\ub825\ud55c \uc720\uc5f0\uc131\uacfc \ub3d9\uc801 \uacc4\uc0b0 \uadf8\ub798\ud504\ub97c \ud2b9\uc9d5\uc73c\ub85c \ud569\ub2c8\ub2e4. \ub610\ud55c, \ud30c\uc774\uc36c\uacfc\uc758 \ub6f0\uc5b4\ub09c \ud638\ud658\uc131 \ub355\ubd84\uc5d0 \ub9ce\uc740 \uc5f0\uad6c\uc790\uc640 \uac1c\ubc1c\uc790\ub4e4\uc774 \uc120\ud638\ud569\ub2c8\ub2e4.<\/p>\n<h3>3.1 \ud30c\uc774\ud1a0\uce58\uc758 \uc7a5\uc810<\/h3>\n<ul>\n<li><strong>\ub3d9\uc801 \uacc4\uc0b0 \uadf8\ub798\ud504:<\/strong> \ud559\uc2b5 \ub3c4\uc911\uc5d0 \ub124\ud2b8\uc6cc\ud06c\uc758 \uad6c\uc870\ub97c \ubcc0\uacbd\ud560 \uc218 \uc788\uc5b4 \uc2e4\ud5d8\uacfc \uc870\uc815\uc774 \uc27d\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uc720\uc5f0\ud55c \ud150\uc11c \uc5f0\uc0b0:<\/strong> NumPy\uc640 \uc720\uc0ac\ud55c \ubc29\uc2dd\uc73c\ub85c \ud150\uc11c\ub97c \uc27d\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\ud48d\ubd80\ud55c \ucee4\ubba4\ub2c8\ud2f0:<\/strong> \ub9ce\uc740 \uc0ac\uc6a9\uc790\uac00 \uc788\uc73c\uba70, \ub2e4\uc591\ud55c \ud29c\ud1a0\ub9ac\uc5bc\uacfc \uc608\uc81c\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>4. \ub525\ub7ec\ub2dd\uc744 \uc774\uc6a9\ud55c \uc774\ubbf8\uc9c0 \ubd84\ub958 \uc608\uc81c<\/h2>\n<p>\uc774\uc81c \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \ud1b5\ud574 \ud30c\uc774\ud1a0\uce58\ub97c \uc774\uc6a9\ud55c \ub525\ub7ec\ub2dd \ubaa8\ub378\uc744 \uad6c\ud604\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774\ubc88 \uc608\uc81c\uc5d0\uc11c\ub294 MNIST \ub370\uc774\ud130\uc14b\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc190\uae00\uc528 \uc22b\uc790\ub97c \ubd84\ub958\ud558\ub294 \ubaa8\ub378\uc744 \ub9cc\ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>4.1 \ud544\uc694\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac \uc124\uce58<\/h3>\n<pre>\n    <code>\n    pip install torch torchvision\n    <\/code>\n    <\/pre>\n<h3>4.2 \ub370\uc774\ud130\uc14b \uc900\ube44<\/h3>\n<p>MNIST \ub370\uc774\ud130\uc14b\uc740 \uc190\uae00\uc528 \uc22b\uc790 \uc774\ubbf8\uc9c0\ub85c \uad6c\uc131\ub41c \ub370\uc774\ud130\uc14b\uc785\ub2c8\ub2e4. \ub2e4\uc74c \ucf54\ub4dc\ub97c \ud1b5\ud574 \ub370\uc774\ud130\uc14b\uc744 \ubd88\ub7ec\uc62c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre>\n    <code>\n    import torch\n    from torchvision import datasets, transforms\n\n    transform = transforms.Compose([\n        transforms.ToTensor(),\n        transforms.Normalize((0.5,), (0.5,))\n    ])\n\n    trainset = datasets.MNIST(root='.\/data', train=True, download=True, transform=transform)\n    trainloader = torch.utils.data.DataLoader(trainset, batch_size=64, shuffle=True)\n    <\/code>\n    <\/pre>\n<h3>4.3 \ubaa8\ub378 \uc815\uc758<\/h3>\n<p>\ub2e4\uc74c\uc73c\ub85c \uac04\ub2e8\ud55c \uc778\uacf5\uc2e0\uacbd\ub9dd \ubaa8\ub378\uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n<pre>\n    <code>\n    import torch.nn as nn\n    import torch.nn.functional as F\n\n    class SimpleNN(nn.Module):\n        def __init__(self):\n            super(SimpleNN, self).__init__()\n            self.fc1 = nn.Linear(28 * 28, 128)\n            self.fc2 = nn.Linear(128, 64)\n            self.fc3 = nn.Linear(64, 10)\n\n        def forward(self, x):\n            x = x.view(-1, 28 * 28)  # Flatten the input\n            x = F.relu(self.fc1(x))\n            x = F.relu(self.fc2(x))\n            x = self.fc3(x)\n            return x\n\n    model = SimpleNN()\n    <\/code>\n    <\/pre>\n<h3>4.4 \uc190\uc2e4 \ud568\uc218\uc640 \uc635\ud2f0\ub9c8\uc774\uc800 \uc815\uc758<\/h3>\n<p>\ubaa8\ub378\uc758 \uc190\uc2e4\uc744 \uacc4\uc0b0\ud558\uace0 \uc5c5\ub370\uc774\ud2b8\ud558\uae30 \uc704\ud574 \uc190\uc2e4 \ud568\uc218\uc640 \uc635\ud2f0\ub9c8\uc774\uc800\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n<pre>\n    <code>\n    criterion = nn.CrossEntropyLoss()\n    optimizer = torch.optim.SGD(model.parameters(), lr=0.01)\n    <\/code>\n    <\/pre>\n<h3>4.5 \ubaa8\ub378 \ud559\uc2b5<\/h3>\n<p>\ubaa8\ub378\uc744 \ud559\uc2b5\uc2dc\ud0a4\uae30 \uc704\ud574\uc11c \ud559\uc2b5 \ub8e8\ud504\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n<pre>\n    <code>\n    epochs = 5\n    for epoch in range(epochs):\n        for images, labels in trainloader:\n            optimizer.zero_grad()  # Zero the gradients\n            output = model(images)  # Forward pass\n            loss = criterion(output, labels)  # Calculate loss\n            loss.backward()  # Backward pass\n            optimizer.step()  # Update weights\n\n        print(f'Epoch {epoch+1}\/{epochs}, Loss: {loss.item()}')\n    <\/code>\n    <\/pre>\n<h3>4.6 \ubaa8\ub378 \ud3c9\uac00<\/h3>\n<p>\ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\uae30 \uc704\ud574 \ud14c\uc2a4\ud2b8 \ub370\uc774\ud130\uc14b\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre>\n    <code>\n    testset = datasets.MNIST(root='.\/data', train=False, download=True, transform=transform)\n    testloader = torch.utils.data.DataLoader(testset, batch_size=64, shuffle=False)\n\n    correct = 0\n    total = 0\n    with torch.no_grad():\n        for images, labels in testloader:\n            outputs = model(images)\n            _, predicted = torch.max(outputs.data, 1)\n            total += labels.size(0)\n            correct += (predicted == labels).sum().item()\n\n    print(f'Accuracy: {100 * correct \/ total}%')\n    <\/code>\n    <\/pre>\n<h2>5. \uacb0\ub860<\/h2>\n<p>\ub525\ub7ec\ub2dd\uc740 \ub9ce\uc740 \ubd84\uc57c\uc5d0\uc11c \ud601\uc2e0\uc744 \uc77c\uc73c\ud0a4\uace0 \uc788\uc73c\uba70, \ud30c\uc774\ud1a0\uce58\ub294 \uadf8 \uad6c\ud604\uc5d0 \uc788\uc5b4 \ub9e4\uc6b0 \uac15\ub825\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c\ub294 \ub525\ub7ec\ub2dd\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \ud568\uaed8 \ud30c\uc774\ud1a0\uce58\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \ubaa8\ub378\uc744 \uad6c\ud604\ud574\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc55e\uc73c\ub85c \ub354 \ub2e4\uc591\ud55c \ud504\ub85c\uc81d\ud2b8\ub97c \ud1b5\ud574 \uc2e4\ub825\uc744 \uc313\uc544\uac00\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub525\ub7ec\ub2dd\uc740 \uc778\uacf5\uc9c0\ub2a5(AI)\uacfc \uba38\uc2e0\ub7ec\ub2dd(ML)\uc758 \ud55c \ubd84\uc57c\ub85c, \uc778\uac04\uc758 \ub1cc \uad6c\uc870\ub97c \ubaa8\ubc29\ud558\uc5ec \ub370\uc774\ud130\uc5d0\uc11c \ud2b9\uc9d5\uc744 \ud559\uc2b5\ud558\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ud559\uc2b5 \uacfc\uc815\uc744 \ud1b5\ud574 \ucef4\ud4e8\ud130\uac00 \uc0ac\ub78c\uacfc \ube44\uc2b7\ud558\uac8c \uc778\uc2dd\ud558\uace0 \ud310\ub2e8\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4. 1. \ub525\ub7ec\ub2dd\uc758 \uc5ed\uc0ac \ub525\ub7ec\ub2dd\uc758 \uac1c\ub150\uc740 1940\ub144\ub300\uc640 1950\ub144\ub300\uc5d0 \uae30\uc6d0\ud569\ub2c8\ub2e4. \uc774 \uc2dc\uae30\uc5d0 \ud37c\uc149\ud2b8\ub860(Perceptron)\uc774\ub77c\ub294 \uc2e0\uacbd\ub9dd \uae30\ubc95\uc774 \uc81c\uc548\ub418\uc5c8\uace0, \uc774\ub294 \uae30\uacc4\uac00 \ud559\uc2b5\ud560 \uc218 \uc788\ub294 \uac04\ub2e8\ud55c \ubaa8\ub378 \uc911 \ud558\ub098\uc600\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ucd08\uae30\uc758 \ud55c\uacc4\ub85c &hellip; <a href=\"https:\/\/atmokpo.com\/w\/30030\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c, \ub525\ub7ec\ub2dd\uc774\ub780&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[33],"tags":[],"class_list":["post-30030","post","type-post","status-publish","format-standard","hentry","category-33"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c, \ub525\ub7ec\ub2dd\uc774\ub780 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atmokpo.com\/w\/30030\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c, \ub525\ub7ec\ub2dd\uc774\ub780 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"\ub525\ub7ec\ub2dd\uc740 \uc778\uacf5\uc9c0\ub2a5(AI)\uacfc \uba38\uc2e0\ub7ec\ub2dd(ML)\uc758 \ud55c \ubd84\uc57c\ub85c, \uc778\uac04\uc758 \ub1cc \uad6c\uc870\ub97c \ubaa8\ubc29\ud558\uc5ec \ub370\uc774\ud130\uc5d0\uc11c \ud2b9\uc9d5\uc744 \ud559\uc2b5\ud558\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ud559\uc2b5 \uacfc\uc815\uc744 \ud1b5\ud574 \ucef4\ud4e8\ud130\uac00 \uc0ac\ub78c\uacfc \ube44\uc2b7\ud558\uac8c \uc778\uc2dd\ud558\uace0 \ud310\ub2e8\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4. 1. \ub525\ub7ec\ub2dd\uc758 \uc5ed\uc0ac \ub525\ub7ec\ub2dd\uc758 \uac1c\ub150\uc740 1940\ub144\ub300\uc640 1950\ub144\ub300\uc5d0 \uae30\uc6d0\ud569\ub2c8\ub2e4. \uc774 \uc2dc\uae30\uc5d0 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