实践Scikit-Learn、Keras与TensorFlow2版:构建智能系统指南

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《动手实践机器学习:使用Scikit-Learn、Keras和TensorFlow(第2版)》是由 Aurélien Géron 所著的一本实战指南,专为读者提供在人工智能领域构建智能系统的概念、工具和技术。本书针对的是第2版,它涵盖了机器学习的核心主题,特别强调了Scikit-Learn、Keras和TensorFlow这三个流行的深度学习框架的应用。 作者Aurélien Géron以其深入浅出的方式,引导读者通过实际操作来掌握机器学习的基本原理和实践技巧。Scikit-Learn被介绍为一个强大的Python库,用于数据预处理、特征工程和监督学习算法的实现,是初学者入门机器学习的理想平台。Keras则是一个高级神经网络API,它允许用户快速搭建和试验各种深度学习模型,适合进行快速原型开发。而TensorFlow,作为Google开源的深度学习框架,提供了强大的灵活性和可扩展性,适用于大规模和复杂的模型构建。 本书的第二版更新包含了最新的技术和工具,如TensorFlow 2.x的发布,该版本强调了简洁易用的API和自动微分功能,使得模型构建更为直观。书中不仅涵盖理论知识,还包含了大量的代码示例和实战项目,使读者能够在实践中逐步提升技能。 从修订历史可以看出,作者不断根据反馈和最新技术发展对内容进行了迭代,确保读者获得的信息始终与业界趋势保持同步。本书不仅适合对机器学习感兴趣的数据科学家、工程师,也适合研究生或大学生深入理解这些框架的工作原理,并将它们应用到实际问题解决中。 通过阅读这本书,读者可以期待学到以下关键知识点: 1. **Scikit-Learn基础**:包括数据预处理、分类、回归、聚类和降维等方法。 2. **Keras入门**:快速搭建神经网络模型,了解卷积神经网络(CNN)、循环神经网络(RNN)等架构。 3. **TensorFlow实践**:深度学习的核心概念,如计算图、张量操作和会话管理,以及高级API如Estimators和Keras集成。 4. **深度学习项目实战**:通过实例学习如何设计、训练和优化深度学习模型,包括图像分类、文本处理等应用场景。 5. **最新技术应用**:包括TensorFlow 2.x的特性,如Eager Execution和Keras集成的改进。 《动手实践机器学习:使用Scikit-Learn、Keras和TensorFlow(第2版)》是一本实用的指南,为读者提供了丰富的学习资源和实践经验,有助于他们在这个快速发展且日益重要的领域取得成功。
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When most people hear “Machine Learning,” they picture a robot: a dependable butler or a deadly Terminator depending on who you ask. But Machine Learning is not just a futuristic fantasy, it’s already here. In fact, it has been around for decades in some specialized applications, such as Optical Character Recognition (OCR). But the first ML application that really became mainstream, improving the lives of hundreds of millions of people, took over the world back in the 1990s: it was the spam filter. Not exactly a self-aware Skynet, but it does technically qualify as Machine Learning (it has actually learned so well that you seldom need to flag an email as spam anymore). It was followed by hundreds of ML applications that now quietly power hundreds of products and features that you use regularly, from better recommendations to voice search. Where does Machine Learning start and where does it end? What exactly does it mean for a machine to learn something? If I download a copy of Wikipedia, has my computer really “learned” something? Is it suddenly smarter? In this chapter we will start by clarifying what Machine Learning is and why you may want to use it. Then, before we set out to explore the Machine Learning continent, we will take a look at the map and learn about the main regions and the most notable landmarks: supervised versus unsupervised learning, online versus batch learning, instance-based versus model-based learning. Then we will look at the workflow of a typical ML project, discuss the main challenges you may face, and cover how to evaluate and fine-tune a Machine Learning system. This chapter introduces a lot of fundamental concepts (and jargon) that every data scientist should know by heart. It will be a high-level overview (the only chapter without much code), all rather simple, but you should make sure everything is crystal-clear to you before continuing to the rest of the book. So grab a coffee and let’s get started!