• Mastering-Feature-Engineering-Principles-Techniques.pdf

    The Machine Learning Pipeline 10 Data 11 Tasks 11 Models 12 Features 13 2. Basic Feature Engineering for Text Data: Flatten and Filter. . . . . . . . . . . . . . . . . . . . . . . 15 Turning Natural Text into Flat Vectors 15 Bag-of-words 16 Implementing bag-of-words: parsing and tokenization 20 Bag-of-N-Grams 21 Collocation Extraction for Phrase Detection 23 Quick summary 26 Filtering for Cleaner Features 26 Stopwords 26 Frequency-based filtering 27 Stemming 30 Summary 31 3. The Effects of Feature Scaling: From Bag-of-Words to Tf-Idf. . . . . . . . . . . . . . . . . . . . . . . 33 Tf-Idf : A Simple Twist on Bag-of-Words 33 Feature Scaling 35 Min-max scaling 35 Standardization (variance scaling) 36 L2 normalization 37 iii www.it-ebooks.info Putting it to the Test 38 Creating a classification dataset 39 Implementing tf-idf and feature scaling 40 First try: plain logistic regression 42 Second try: logistic regression with regularization 43 Discussion of results 46 Deep Dive: What is Happening? 47

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  • NFS Illustrated by Brent Callaghan (z-lib.org).pdf

    Preface I have been working with the NFS protocol since I joined Sun Microsystems in 1986. At that time the NFS market was expanding rapidly and I was excited to be working with the group, led by Bob Lyon, that developed the protocol and its first implementation in SunOS. In the NFS group, the protocol was a powerful but raw technology that needed to be exploited. We wanted it to run on as many platforms as possible, so an NFS porting group was assigned the task of helping other companies implement NFS on their computers. Our NFS evangelism was a little ahead of its time. Before the phrase “open systems” had yet become hackneyed, we’d made the source code for Sun RPC available for free download via FTP server1 and organized the first Connectathon event. At Connectathon our enthusiasm for NFS was shared with engineers from other companies who brought along their machines, source code, and junk food and spent a few days connected to a network, testing their NFS client and server implementations against each other. Implementations of the NFS protocol have been successful in bringing remote file access to programs through existing interfaces. There is no need to change the software for remote file access or to name files differently. NFS has been almost too successful at making remote files indistinguishable from local files. For instance, a program that backs up files on a local disk to tape needs to avoid stumbling into NFS filesystems. For everyone but system administrators, NFS is invisible—if you ignore the rare “NFS server not responding” message. It’s easy to forget NFS is there. NFS has no programming interface of its own. Even software engineers have no need to deal with NFS directly. There are no conference tutorials called “Programming with NFS,” there are no magazine screen shots of NFS-enabled applications, and there are no demonstrations of NFS at trade shows. Except for server administrators, NFS seems not to exist. There are many server implementations of the NFS protocol, each with its own features. Each of these server implementations has its own documentation, each slightly different. Perhaps this explains why there are so few NFS books available. NFS is never more than a chapter in a book about

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  • Patterns of Enterprise Application Architecture中文版

    此书提供了Enterprise Service Bus(企业服务总线)体系结构的概览,展示了如何使用事件驱动的面向服务的体系架构,集成建立在J2EE, .NET, C/C++,java以及其它环境下的企业应用和服务。

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    2013-06-06
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  • JDK API中文

    JavaTM 2 Platform Standard Edition 5.0 API 规范 本文档是 Java 2 Platform Standard Edition 5.0 的 API 规范。

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    2013-05-14
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  • 数据结构和算法,字符串操作等常见试题

    包含面试中经常考的数据结构,算法以及字符串的操作等常见的面试问题,经典解答

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    2012-12-20
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  • Linux实用教程

    一本介绍linux系统常用命令,系统管理等知识的实用教程。

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    2012-12-20
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  • Linux.System.Programming

    In this book, Robert Love has taken on the unenviable task of teaching the reader about almost every system call on a Linux system. In so doing, he has produced a tome that will allow you to fully understand how the Linux kernel works from a user-space perspective, and also how to harness the power of this system.

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    57
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    2008-10-09
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  • haskell中文版教程

    haskell functional 函数式编程 编程的新潮流. haskell functional 函数式编程 编程的新潮流.

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    60
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    2008-09-07
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  • Linux常见问题一句话精彩问答

    Linux一句话精彩问答--2008-03-07更新--20071212pdf版本下载 - 系统管理 - Linux论坛

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  • Linux命令大全(系统)

    非常好的Linux命令大全 提供linux下面的各种常用命令。

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