V7.0中标麒麟桌面操作系统磁盘管理工具详解及np.random.shuffle应用

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使用tensorflow2.0.0版本实现多变量线性回归模型，要求有准备数据、构建模型、训练模型、预测模型四个步骤，使用np.random.seed准备数据，权重有3个，分别为9.0、2.0、8.0，偏置为1.0，无需在控制台输出结果，但是要使用matplotlib输出模型图像

```python import tensorflow as tf import numpy as np import matplotlib.pyplot as plt # 准备数据 np.random.seed(42) x1 = np.random.rand...注：由于使用np.random.seed准备数据，每次运行结果应该是一致的。

修正以下的代码data = pd.read_excel(r"D:\pythonProject60\filtered_data1.xlsx") X = data.iloc[:, :-1] y = data.iloc[:, -1] from scipy.interpolate import interp1d # 数据归一化 scaler = StandardScaler() # 将X,Y数据进行归一化 X = scaler.fit_transform(X) # 随机划分训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, train_size=0.7) X_fuzzy = [] for i in range(X.shape[1]): fuzzy_vals = fuzz.trimf(X[:,i], [np.min(X[:,i]), np.mean(X[:,i]), np.max(X[:,i])]) X_fuzzy.append(fuzzy_vals) X_fuzzy = np.array(X_fuzzy).T # 构建深度神经模糊网络 model = tf.keras.Sequential([ tf.keras.layers.Dense(64, activation='relu', input_dim=X_fuzzy.shape[1]), tf.keras.layers.Dense(32, activation='relu'), tf.keras.layers.Dense(1, activation='sigmoid') ]) model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy']) model.fit(X_fuzzy, y, epochs=10, batch_size=32) # 训练随机森林分类器 rf_clf = RandomForestClassifier(n_estimators=100, max_depth=5) rf_clf.fit(model.predict(X_fuzzy), y) # 预测新数据点 new_data = np.random.rand(5) new_data_fuzzy = [] for i in range(new_data.shape[0]): fuzzy_val = fuzz.interp_membership(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), fuzz.trimf(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), [np.min(X[:,i]), np.mean(X[:,i]), np.max(X[:,i])]), new_data[i]) new_data_fuzzy.append(fuzzy_val) new_data_fuzzy = np.array(new_data_fuzzy).reshape(1,-1)

new_data = np.random.rand(5) new_data_fuzzy = [] for i in range(new_data.shape[0]): fuzzy_val = fuzz.interp_membership(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), fuzz.trimf(np.linspace(np.min...

lite-model_keras-ocr_float16_2.tflite和lite-model_keras-ocr_dr_2.tflite的区别

该模型是通过在大型 OCR 数据集上进行训练，使用 Keras 框架和浮点数计算得到的。 - `lite-model_keras-ocr_dr_2.tflite` 使用了动态范围量化（Dynamic Range Quantization，DRQ）技术，将浮点数权重和激活值转换为...

import keras from keras.datasets import mnist from keras.models import Sequential from keras.utils import np_utils from keras.preprocessing.image import ImageDataGenerator from keras.layers import Dense,Dropout,Flatten,Conv2D,MaxPool2D from keras.layers import BatchNormalization

- `keras.utils`：Keras 中的一些实用工具，包括数据转换、评估指标等。 - `keras.preprocessing.image`：Keras 中的图像预处理模块，可以对图像进行增强、缩放等操作。 - `keras.layers`：Keras 中的各种神经网络层...

URL fetch failure on https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz: None -- unknown url type: https

这个错误提示表明你的程序无法从指定的 URL 地址 `https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz` 下载 MNIST 数据集。可能是由于网络连接问题、代理设置或防火墙等原因导致的。你可以...

Traceback (most recent call last): File "D:/code/hrnet-keras-main/train.py", line 18, in <module> from utils.dataloader import SegmentationDataset File "D:\code\hrnet-keras-main\utils\dataloader.py", line 13, in <module> class SegmentationDataset(keras.utils.Sequence): AttributeError: module 'keras.utils' has no attribute 'Sequence'

在较新的 Keras 版本中，`Sequence` 类被移动到了 `keras.utils.data` 模块中。你可以尝试将代码中的 `keras.utils.Sequence` 替换为 `keras.utils.data.Sequence` 来解决这个问题。如果你使用的是较旧的 Keras ...

修正以下代码X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, train_size=0.7) X_fuzzy = [] for i in range(X.shape[1]): fuzzy_vals = fuzz.trimf(X[:,i], [np.min(X[:,i]), np.mean(X[:,i]), np.max(X[:,i])]) X_fuzzy.append(fuzzy_vals) X_fuzzy = np.array(X_fuzzy).T # 构建深度神经模糊网络 model = tf.keras.Sequential([ tf.keras.layers.Dense(64, activation='relu', input_dim=X_fuzzy.shape[1]), tf.keras.layers.Dense(32, activation='relu'), tf.keras.layers.Dense(1, activation='sigmoid') ]) model.compile(optimizer='adam', loss='binary_crossentropy', metrics=['accuracy']) model.fit(X_fuzzy, y, epochs=10, batch_size=32) # 训练随机森林分类器 rf_clf = RandomForestClassifier(n_estimators=100, max_depth=5) rf_clf.fit(model.predict(X_fuzzy), y) # 预测新数据点 new_data = np.random.rand(5) new_data_fuzzy = [] for i in range(new_data.shape[0]): fuzzy_val = fuzz.interp_membership(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), fuzz.trimf(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), [np.min(X[:,i]), np.mean(X[:,i]), np.max(X[:,i])]), new_data[i]) new_data_fuzzy.append(fuzzy_val) new_data_fuzzy = np.array(new_data_fuzzy).reshape(1,-1)

new_data = np.random.rand(5) new_data_fuzzy = [] for i in range(new_data.shape[0]): fuzzy_val = fuzz.interp_membership(np.linspace(np.min(X[:,i]), np.max(X[:,i]), 100), fuzz.trimf(np.linspace(np....

ImportError: cannot import name 'shuffle' from 'keras.utils'

3. 使用其他的随机化方法：如果你只是需要随机打乱数据集，也可以考虑使用其他方法，例如使用 NumPy 库中的 `np.random.shuffle()` 函数。希望这些解决方案能帮助你解决问题！如果还有其他疑问，请随时提问。

使用keras.Sequential时候我们添加网络层训练后，除调用model.summary()函数外，可以在模型中添加 tf.keras.layers.Lambda 层后如何打印输出查看？注意在代码中不要使用tf.keras.datasets.mnist.load_data()

如果不使用 `tf.keras.datasets.mnist.load_data()` 函数加载 MNIST 数据集，可以手动创建一些样本数据进行测试。以下是一个完整的示例代码： ```python import tensorflow as tf import numpy as np # 构建模型 ...

class RNN: def init(self, input_size, hidden_size, output_size): self.input_size = input_size self.hidden_size = hidden_size self.output_size = output_size # 初始化参数 self.Wxh = np.random.randn(hidden_size, input_size) * 0.01 # 输入层到隐藏层的权重矩阵 self.Whh = np.random.randn(hidden_size, hidden_size) * 0.01 # 隐藏层到隐藏层的权重矩阵 self.Why = np.random.randn(output_size, hidden_size) * 0.01 # 隐藏层到输出层的权重矩阵 self.bh = np.zeros((hidden_size, 1)) # 隐藏层偏置 self.by = np.zeros((output_size, 1)) # 输出层偏置 # 初始化隐藏状态 self.h = np.zeros((hidden_size, 1)) def forward(self, x): # 更新隐藏状态 self.h = np.tanh(np.dot(self.Wxh, x) + np.dot(self.Whh, self.h) + self.bh) # 计算输出 y = np.dot(self.Why, self.h) + self.by # 返回输出和隐藏状态 return y, self.h def backward(self, x, y, target, learning_rate): # 计算输出误差 dy = y - target # 计算隐藏状态误差 dh = np.dot(self.Why.T, dy) * (1 - self.h ** 2) # 计算权重和偏置的梯度 dWhy = np.dot(dy, self.h.T) dby = np.sum(dy, axis=1, keepdims=True) dWxh = np.dot(dh, x.T) dWhh = np.dot(dh, self.h.T) dbh = np.sum(dh, axis=1, keepdims=True) # 更新权重和偏置 self.Why -= learning_rate * dWhy self.by -= learning_rate * dby self.Wxh -= learning_rate * dWxh self.Whh -= learning_rate * dWhh self.bh -= learning_rate * dbh 帮写一下用online_shopping_10_cats数据集训练以上模型的代码和步骤

将数据集划分为训练集和测试集，以便于在训练过程中进行模型评估。可以使用sklearn.model_selection中的train_test_split()函数来实现这一步骤。代码如下： ``` from sklearn.model_selection import train_test_...

解释各个库import numpy as np import matplotlib.pyplot as plt from keras.models import Sequential from keras.layers import Dense, SimpleRNN from keras import backend as K from keras.models import Model from sklearn.cluster import KMeans

- `numpy`：科学计算库，提供了高效的多维数组（ndarray）和各种数学函数，可以用于处理矩阵、向量等数据。...- `sklearn.cluster.KMeans`：Scikit-learn库中的一个聚类算法类，可以用于将数据集分成多个类别。

import tensorflow as tf import numpy as np import gym # 创建 CartPole 游戏环境 env = gym.make('CartPole-v1') # 定义神经网络模型 model = tf.keras.models.Sequential([ tf.keras.layers.Dense(24, activation='relu', input_shape=(4,)), tf.keras.layers.Dense(24, activation='relu'), tf.keras.layers.Dense(2, activation='linear') ]) # 定义优化器和损失函数 optimizer = tf.keras.optimizers.Adam() loss_fn = tf.keras.losses.MeanSquaredError() # 定义超参数 gamma = 0.99 # 折扣因子 epsilon = 1.0 # ε-贪心策略中的初始 ε 值 epsilon_min = 0.01 # ε-贪心策略中的最小 ε 值 epsilon_decay = 0.995 # ε-贪心策略中的衰减值 batch_size = 32 # 每个批次的样本数量 memory = [] # 记忆池 # 定义动作选择函数 def choose_action(state): if np.random.rand() < epsilon: return env.action_space.sample() else: Q_values = model.predict(state[np.newaxis]) return np.argmax(Q_values[0]) # 定义经验回放函数 def replay(batch_size): batch = np.random.choice(len(memory), batch_size, replace=False) for index in batch: state, action, reward, next_state, done = memory[index] target = model.predict(state[np.newaxis]) if done: target[0][action] = reward else: Q_future = np.max(model.predict(next_state[np.newaxis])[0]) target[0][action] = reward + Q_future * gamma model.fit(state[np.newaxis], target, epochs=1, verbose=0) # 训练模型 for episode in range(1000): state = env.reset() done = False total_reward = 0 while not done: action = choose_action(state) next_state, reward, done, _ = env.step(action) memory.append((state, action, reward, next_state, done)) state = next_state total_reward += reward if len(memory) > batch_size: replay(batch_size) epsilon = max(epsilon_min, epsilon * epsilon_decay) print("Episode {}: Score = {}, ε = {:.2f}".format(episode, total_reward, epsilon))next_state, reward, done, _ = env.step(action) ValueError: too many values to unpack (expected 4)优化代码

问题出现在最后一个环节中。根据 OpenAI Gym 的文档，CartPole-v1 环境的 step() 函数返回的是四个值，分别是下一个状态、本次动作的奖励、游戏是否结束和一些额外信息。而在原始代码中，使用了一个 _ 变量来占位，...

import os import pickle import cv2 import matplotlib.pyplot as plt import numpy as np from keras.layers import Conv2D, MaxPooling2D, Flatten, Dense, Dropout from keras.models import Sequential from keras.optimizers import adam_v2 from keras_preprocessing.image import ImageDataGenerator from sklearn.model_selection import train_test_split from sklearn.preprocessing import LabelEncoder, OneHotEncoder, LabelBinarizer def load_data(filename=r'/root/autodl-tmp/RML2016.10b.dat'): with open(r'/root/autodl-tmp/RML2016.10b.dat', 'rb') as p_f: Xd = pickle.load(p_f, encoding="latin-1") # 提取频谱图数据和标签 spectrograms = [] labels = [] train_idx = [] val_idx = [] test_idx = [] np.random.seed(2016) a = 0 for (mod, snr) in Xd: X_mod_snr = Xd[(mod, snr)] for i in range(X_mod_snr.shape[0]): data = X_mod_snr[i, 0] frequency_spectrum = np.fft.fft(data) power_spectrum = np.abs(frequency_spectrum) ** 2 spectrograms.append(power_spectrum) labels.append(mod) train_idx += list(np.random.choice(range(a * 6000, (a + 1) * 6000), size=3600, replace=False)) val_idx += list(np.random.choice(list(set(range(a * 6000, (a + 1) * 6000)) - set(train_idx)), size=1200, replace=False)) a += 1 # 数据预处理 # 1. 将频谱图的数值范围调整到0到1之间 spectrograms_normalized = spectrograms / np.max(spectrograms) # 2. 对标签进行独热编码 label_binarizer = LabelBinarizer() labels_encoded= label_binarizer.fit_transform(labels) # transfor the label form to one-hot # 3. 划分训练集、验证集和测试集 # X_train, X_temp, y_train, y_temp = train_test_split(spectrograms_normalized, labels_encoded, test_size=0.15, random_state=42) # X_val, X_test, y_val, y_test = train_test_split(X_temp, y_temp, test_size=0.5, random_state=42) spectrogramss = np.array(spectrograms_normalized) print(spectrogramss.shape) labels = np.array(labels) X = np.vstack(spectrogramss) n_examples = X.shape[0] test_idx = list(set(range(0, n_examples)) - set(train_idx) - set(val_idx)) np.random.shuffle(train_idx) np.random.shuffle(val_idx) np.random.shuffle(test_idx) X_train = X[train_idx] X_val = X[val_idx] X_test = X[test_idx] print(X_train.shape) print(X_val.shape) print(X_test.shape) y_train = labels[train_idx] y_val = labels[val_idx] y_test = labels[test_idx] print(y_train.shape) print(y_val.shape) print(y_test.shape) # X_train = np.expand_dims(X_train,axis=-1) # X_test = np.expand_dims(X_test,axis=-1) # print(X_train.shape) return (mod, snr), (X_train, y_train), (X_val, y_val), (X_test, y_test) 这是我的数据预处理代码

在代码中，你还有一些注释掉的代码段，例如对数据集进行划分的部分。如果你打算使用这些划分代码，你可以取消注释相应的行。另外，如果你的频谱图数据维度是二维的，你可能需要使用`np.expand_dims`函数将其扩展为三...

import os import numpy as np import matplotlib.pyplot as plt from PIL import Image from colorcet.plotting import arr from sklearn.cluster import SpectralClustering from sklearn.decomposition import PCA from tensorflow.keras.preprocessing import image from tensorflow.keras.applications.resnet50 import ResNet50 from tensorflow.keras.applications.resnet50 import preprocess_input # 定义加载图片函数 def load_image(img_path): img = image.load_img(img_path, target_size=(224, 224)) x = image.img_to_array(img) x = np.expand_dims(x, axis=0) x = preprocess_input(x) return x # 加载ResNet50模型 model = ResNet50(weights='imagenet', include_top=False, pooling='avg') # 加载图片并提取特征向量 img_dir = 'D:/wjd' img_names = os.listdir(img_dir) X = [] for img_name in img_names: img_path = os.path.join(img_dir, img_name) img = load_image(img_path) features = model.predict(img)[0] X.append(features) # 将特征向量转化为矩阵 X = np.array(X) # 将复数类型的数据转换为实数类型 X = np.absolute(X) # 计算相似度矩阵 S = np.dot(X, X.T) # 归一化相似度矩阵 D = np.diag(np.sum(S, axis=1)) L = D - S L_norm = np.dot(np.dot(np.sqrt(np.linalg.inv(D)), L), np.sqrt(np.linalg.inv(D))) # 计算特征向量 eigvals, eigvecs = np.linalg.eig(L_norm) idx = eigvals.argsort()[::-1] eigvals = eigvals[idx] eigvecs = eigvecs[:, idx] Y = eigvecs[:, :2] # 使用谱聚类进行分类 n_clusters = 5 clustering = SpectralClustering(n_clusters=n_clusters, assign_labels="discretize", random_state=0).fit(Y) # 可视化聚类结果 pca = PCA(n_components=2) X_pca = pca.fit_transform(X) plt.scatter(X_pca[:, 0], X_pca[:, 1], c=clustering.labels_, cmap='rainbow') plt.show()，反复会出现numpy.ComplexWarning: Casting complex values to real discards the imaginary part The above exception was the direct cause of the following exception，这个问题

这个问题是因为在计算相似度矩阵时，可能存在复数类型的数据，导致计算时出现警告或异常。你可以尝试在计算相似度矩阵前，将特征向量转换为实数类型。你可以使用numpy的绝对值函数numpy.absolute()来将复数类型的...

mnist = tf.keras.datasets.mnist.怎么改成中文手写数据集

在TensorFlow中，我们可以使用tf.keras.datasets.mnist模块轻松地载入这个数据集，代码如下： ``` import tensorflow as tf (x_train, y_train), (x_test, y_test) = tf.keras.datasets.mnist.load_data() ``` ...

ImportError: cannot import name 'Adam' from 'keras.optimizers' (E:\conda\envs\tfgpu\lib\site-packages\keras\optimizers.py)

这个错误通常出现在使用旧版本的Keras时，因为Adam优化器在较早的Keras版本中可能不可用。为了解决这个问题，您可以尝试以下解决方案： 1. 更新Keras版本：确保您正在使用最新版本的Keras。您可以尝试通过运行以下...

解释这段代码import os import numpy as np from PIL import Image import tensorflow as tf from tensorflow.keras.preprocessing.image import img_to_array from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Conv2D, MaxPooling2D, Flatten

这段代码是导入了一些Python库和TensorFlow中的模块和函数。具体解释如下： - `os`：一个提供了很多操作系统相关功能的Python标准库。 - `numpy`：一个用于科学计算的Python库，提供了高性能的多维数组对象以及相关...

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V7.0中标麒麟桌面操作系统磁盘管理工具详解及np.random.shuffle应用

在Keras中利用np.random.shuffle()打乱数据集实例

Python库 | mlp-mixer-keras-0.0.2.tar.gz

Python库 | neptune-tensorflow-keras-0.9.1.tar.gz

lite-model_keras-ocr_float16_2.tflite和lite-model_keras-ocr_dr_2.tflite的区别

import keras from keras.datasets import mnist from keras.models import Sequential from keras.utils import np_utils from keras.preprocessing.image import ImageDataGenerator from keras.layers import Dense,Dropout,Flatten,Conv2D,MaxPool2D from keras.layers import BatchNormalization

URL fetch failure on https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz: None -- unknown url type: https

ImportError: cannot import name 'shuffle' from 'keras.utils'

使用keras.Sequential时候我们添加网络层训练后，除调用model.summary()函数外，可以在模型中添加 tf.keras.layers.Lambda 层后如何打印输出查看？注意在代码中不要使用tf.keras.datasets.mnist.load_data()

解释各个库import numpy as np import matplotlib.pyplot as plt from keras.models import Sequential from keras.layers import Dense, SimpleRNN from keras import backend as K from keras.models import Model from sklearn.cluster import KMeans

mnist = tf.keras.datasets.mnist.怎么改成中文手写数据集

ImportError: cannot import name 'Adam' from 'keras.optimizers' (E:\conda\envs\tfgpu\lib\site-packages\keras\optimizers.py)

解释这段代码import os import numpy as np from PIL import Image import tensorflow as tf from tensorflow.keras.preprocessing.image import img_to_array from tensorflow.keras.models import Sequential from tensorflow.keras.layers import Conv2D, MaxPooling2D, Flatten

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