learning pyspark

First, how to learn a large-scale data set?In the case of a large training sample set, we can take a small sample to learn the model, such as m=1000, and then draw the corresponding learning curve. If the model is found to be of high deviation according to the learning curve, the model should continue to be adjusted on the existing sample, and the adjustment strategy should refer to the High deviation of se

1. What is manifoldManifold Learning Viewpoint: We think that the data we can observe is actually mapped by a low-dimensional pandemic to a high-dimensional space. Due to the limitations of the internal characteristics of the data, some of the data in the higher dimensions produce redundancy on the dimension, which in fact can be represented only by a lower dimension. So intuitively speaking, a manifold is like a D-dimensional space, in a m-dimensiona

1. Transfer Learning In practice, because of the size of the database, we usually do not start from scratch (random initialization of parameters) to train convolution neural networks. Instead, it is usually done on a large database (for example, Imagenet, a 1000-class image classification database with a total of 1.2 million) for CNN training, a trained network (hereinafter referred to as Convnet), and convnet in the following two ways to use our pro

This afternoon, idle to nothing, so Baidu turned to see the recent on the pattern recognition, as well as the latest progress in target detection, there are a lot of harvest!------------------------------------AUTHOR:PKF-----------------------------------------------time:2016-1-20--------------------------------------------------------------qq:13277066461. The nature of deep learning2. The effect of deep learning on the detection of traditional transc

1. Scikit-learn IntroductionScikit-learn is an open-source machine learning module for Python, built on numpy,scipy and matplotlib modules. It is worth mentioning that Scikit-learn was first launched by David Cournapeau in 2007, a Google Summer of code project, since then the project has been a lot of contributors, And the project has been maintained by a team of volunteers so far.Scikit-learn's biggest feature is the ability to provide users with a v

In machine learning-Hangyuan Li-The Perceptual Machine for learning notes (1) We already know the modeling of perceptron and its geometrical meaning. The relevant derivation is also explicitly deduced. Have a mathematical model. We are going to calculate the model.The purpose of perceptual machine learning is to find a separate hyper plane that can completely sep

Today I saw in this article how to choose the model, feel very good, write here alone.More machine learning combat can read this article: http://www.cnblogs.com/charlesblc/p/6159187.htmlIn addition to the difference between machine learning and data mining,Refer to this article: https://www.zhihu.com/question/30557267Data mining: Also known as mining, isa very broad concept.。 It literally means digging up u

Generate learning Algorithms This course outline: 1. Generate learning Algorithms 2. Gaussian discriminant analysis (Gda,gaussian discriminant) - Gaussian distribution (brief) - Contrast Generation learning Algorithm discriminant Learning Algorithm (brief) 3. Naive Bayes 4. Laplace Smoothing Review: Classification al

Learning notes for "Machine Learning Practice": Implementation of k-Nearest Neighbor algorithms, and "Machine Learning Practice" k- The main learning and research tasks of the last semester were pattern recognition, signal theory, and image processing. In fact, these fields have more or less intersection with machine

Learning notes TF053: Recurrent Neural Network, TensorFlow Model Zoo, reinforcement learning, deep forest, deep learning art, tf053tensorflow Recurrent Neural Networks. Bytes. Natural language processing (NLP) applies the network model. Unlike feed-forward neural network (FNN), cyclic networks introduce qualitative loops, and the signal transmission does not disa

non-supervised learning:watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvdtaxmzq3njq2na==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">In this way of learning. The input data part is identified, some are not identified, such a learning model can be used to predict, but the model first need to learn the internal structure of the data in order to reasonably organize the data to be

This column (Machine learning) includes single parameter linear regression, multiple parameter linear regression, Octave Tutorial, Logistic regression, regularization, neural network, machine learning system design, SVM (Support vector machines Support vector machine), clustering, dimensionality reduction, anomaly detection, large-scale machine learning and other

Continue to learn http://www.cnblogs.com/tornadomeet/archive/2013/03/15/2962116.html, the last class learning rate is fixed, and here we aim to find a better learning rate. We mainly observe the different learning rate corresponding to the different loss value and the number of iterations between the function curve is how to find the fastest convergence of the fu

Non-supervised learning: In this learning mode, the input data part is identified, the part is not identified, the learning model can be used for prediction, but the model first needs to learn the internal structure of the data in order to reasonably organize the data to make predictions. The application scenarios include classification and regression, and t

Recent research on this one thing-the limit learning machine. In many problems, I often encounter two problems, one is classification, the other is regression. To put it simply, the classification is to label a bunch of numbers, and the regression is to turn a number into a number. Here we need to deal with the general dimension of the data is relatively high, in dealing with these two types of problems, the simplest way is weighted. The weight

Original: Image classification in 5 Methodshttps://medium.com/towards-data-science/image-classification-in-5-methods-83742aeb3645 Image classification, as the name suggests, is an input image, output to the image content classification of the problem. It is the core of computer vision, which is widely used in practice. The traditional method of image classification is feature description and detection, such traditional methods may be effective for some simple image classification, but the tradit

Transferred from: http://blog.csdn.net/zouxy09/article/details/8775488 Because we want to learn the characteristics of the expression, then about the characteristics, or about this level of characteristics, we need to understand more in-depth point. So before we say deep learning, we need to re-talk about the characteristics (hehe, actually see so good interpretation of the characteristics, not put here a little pity, so it was stuffed here). Iv. Abo

deep understanding of machine learning: Learning Notes from principles to algorithms-1th week 02 easy to get started Deep understanding of machine learning from principle to algorithmic learning notes-1th week 02 Easy to get started 1 General model statistical learning theo

The motive and application of machine learningTools: Need genuine: Matlab, free: Octavedefinition (Arthur Samuel 1959):The research field that gives the computer learning ability without directly programming the problem.Example: Arthur's chess procedure, calculates the probability of winning each step, and eventually defeats the program author himself. (Feel the idea of using decision trees)definition 2(Tom Mitchell 1998):A reasonable

TensorFlowTensorFlow is Google's second generation of AI learning systems based on Distbelief, whose name comes from its own operating principles. Tensor (tensor) means n-dimensional arrays, flow (stream) means the computation based on data flow diagram, TensorFlow flows from one end of the flow graph to the other. TensorFlow is a system that transmits complex data structures to artificial neural networks for analysis and processing. TensorFlow can be