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📜  Tensorflow.js tf.initializers.heNormal()函数

📅  最后修改于: 2022-05-13 01:56:34.335000             🧑  作者: Mango

Tensorflow.js tf.initializers.heNormal()函数

Tensorflow.js是谷歌开发的一个开源库,用于在浏览器或节点环境中运行机器学习模型和深度学习神经网络。它还可以帮助开发人员用 JavaScript 语言开发 ML 模型,并且可以直接在浏览器或 Node.js 中使用 ML。

tf.initializers.heNormal()函数从以零为中心的截断正态分布中抽取样本,其中stddev = sqrt(2 / fanIn)在 [-limit, limit] 内,其中 limit 为sqrt(6 / fan_in) 。请注意,fanIn 是张量权重中的输入数量。

句法:

tf.initializers.heNormal(arguments)

参数:

  • arguments:它是一个包含种子(一个数字)的对象,它是随机数生成器的种子/数字。

返回值:它返回tf.initializers.Initializer

示例 1:

Javascript
// Importing the tensorflow.js library
import * as tf from "@tensorflow/tfjs"
 
// Initializing the .initializers.heNormal()
// function
const geek = tf.initializers.heNormal(7)
 
// Printing gain
console.log(geek);
console.log('\nIndividual values:\n');
console.log(geek.scale);
console.log(geek.mode);
console.log(geek.distribution);


Javascript
// Importing the tensorflow.Js library
import * as tf from "@tensorflow/tfjs
 
// Defining the input value
const inputValue = tf.input({shape:[4]});
 
// Initializing tf.initializers.heNormal() function
const funcValue = tf.initializers.heNormal(3)
 
// Creating dense layer 1
const dense_layer_1 = tf.layers.dense({
    units: 7,
    activation: 'relu',
    kernelInitialize: funcValue
});
 
// Creating dense layer 2
const dense_layer_2 = tf.layers.dense({
    units: 8,
    activation: 'softmax'
});
 
// Output
const outputValue = dense_layer_2.apply(
  dense_layer_1.apply(inputValue)
);
 
// Creation the model.
const model = tf.model({
    inputs: inputValue,
    outputs: outputValue
});
 
// Predicting the output.
model.predict(tf.ones([2, 4])).print();


输出:

{
  "scale": 2,
  "mode": "fanIn",
  "distribution": "normal"
}

Individual values:

2
fanIn
normal

示例 2:

Javascript

// Importing the tensorflow.Js library
import * as tf from "@tensorflow/tfjs
 
// Defining the input value
const inputValue = tf.input({shape:[4]});
 
// Initializing tf.initializers.heNormal() function
const funcValue = tf.initializers.heNormal(3)
 
// Creating dense layer 1
const dense_layer_1 = tf.layers.dense({
    units: 7,
    activation: 'relu',
    kernelInitialize: funcValue
});
 
// Creating dense layer 2
const dense_layer_2 = tf.layers.dense({
    units: 8,
    activation: 'softmax'
});
 
// Output
const outputValue = dense_layer_2.apply(
  dense_layer_1.apply(inputValue)
);
 
// Creation the model.
const model = tf.model({
    inputs: inputValue,
    outputs: outputValue
});
 
// Predicting the output.
model.predict(tf.ones([2, 4])).print();

输出:

参考: https://js.tensorflow.org/api/latest/#initializers.heNormal