陈浅墨-CSDN博客

原创蓝牙音箱连接电脑后无法工具电脑上调节声音大小

问题描述：蓝牙音箱连接电脑后，无法工具系统声音的大小调节蓝牙音箱的大小。不论系统声音调节多大，音箱一直是最大声。除非系统声音静音了，蓝牙音箱没有声音。当时应用上调节声音大小对音箱有效。问题原因：win10调整了蓝牙策略，默认启用蓝牙绝对音量。解决部分：在贴吧上看到此方法，特此记录，方便以后查找win+r，输入regedit，打开注册表进入\HKEY_MACHINE\SYSTEM\ControlSet001\Control\Bluetooth\Audio\AVRCP\CT 找到Disab

2020-07-09 22:52:44 7344

原创字典序全排列

字典序法的描述如下：设P是1～n的一个全排列:p=p1p2……pn=p1p2……pj-1pjpj+1……pk-1pkpk+1……pn从排列的右端开始，找出第一个比右边字符小的字符的序号j（j从左端开始计算），即 j=max{i|pi

2017-07-10 16:22:25 1356

原创约瑟夫环——公式法（递推公式）

约瑟夫问题约瑟夫问题是个有名的问题：N个人围成一圈，第一个从1开始报数，报M的将被杀掉，下一个人接着从1开始报。如此反复，最后剩下一个，求最后的胜利者。例如只有三个个人，把他们叫做A、B、C围成一圈，从A开始报数，报2的人被杀掉。A开始报数，他报1。侥幸逃过一劫。然后轮到B报数，他报2。非常惨，他被杀了C接着从1开始报数然后轮到A报数，他报2。也被杀死了。最终胜利者是C解决方案普通解

2017-06-04 01:02:52 144591 118

原创目标函数与损失函数的差别

今天微博上看到有朋友转发了Quora上的一个提问:目标函数和损失函数是一样的吗? 评论区里几乎所有人都表示：这两不就是同一个东西吗？但是总感觉有哪里不对。数学讲究用最精简的语言去描述对象，为什么同一个东西会有两种叫法？是的，它们的确是不同的！损失函数度量的是预测值与真实值之间的差异。损失函数通常写作L(y^,y)L(\hat{y},y)，y^\hat{y}代表预测值，yy代表真实值。例如s

2017-02-17 21:09:55 10678 2

原创 Tensorflow系列——conv2d的用法

在做卷积处理时会遇到一个问题，边缘的像素怎么处理？有两种选择：丢弃（VALID）：这种方式会丢弃边缘的点，保证卷积核不溢出图片。即使滑动的间隔为1，这样将导致卷积之后的图片变小。填充（SAME）：这种方式会对输入的矩阵外层包裹n层0，以保证当卷积核的中心位于原图片边缘的像素点时原先空白的地方现在用0补上。

2017-02-13 10:38:26 4514 1

翻译 Variables: 创建、初始化、保存和加载

引言当你训练一个模型的时候，你使用变量去保存和更新参数。在Tensorflow中变量是内存缓冲区中保存的张量（tensor）。它们必须被显示的初始化，可以在训练完成之后保存到磁盘上。之后，你可以重新加载这些值用于测试和模型分析。本篇文档引用了如下的Tensorflow类。以下的链接指向它们更加详细的API：tf.Variable 类。The tf.train.Saver 类。创建当你创建

2016-11-30 21:38:13 18723 1

翻译 Tensorflow系列——基本用法

为了使用TensorFlow，我们需要明白什么是Tensorflow。下面介绍Tensorflow的5个特征：用图来表示计算过程用Sessions（会话）来执行图使用tensors来表示数据使用Variables来维护状态使用feeds和fetches操作对任意的操作取出或者存入数据1. 综述Tensorflow是一个编程系统，你需要把计算用图来表示。图中的节点被称作ops（操作，ope

2016-11-26 21:18:50 1327

翻译 Tensorflow系列——MNIST(针对机器学习入门者)

引言本篇教程针对机器学习和Tensorflow的初学者。如果你已经知道MNIST是什么，以及softmax（multinomial logistic）regression是什么，你跳过此章节，直接阅读进阶教程。在开始学习本教程前，请确定你已经安装好Tensorflow。当我们学习编程的时候，我们的第一个程序经常是打印“hello word”。就像学习编程一样，机器学习常以MNIST作为入门。

2016-11-25 16:47:15 868

原创 136. Single Number

Problem descriptionGiven an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you imple

2016-08-18 15:40:47 393

原创 292. Nim Game

Problem descriptionYou are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 stones. The one who removes the l

2016-08-18 11:21:21 492

原创 371. Sum of Two Integers

Problem descriptionCalculate the sum of two integers a and b, but you are not allowed to use the operator + and -.Example:Given a = 1 and b = 2, return 3.题目描述计算两个整数a与b的和，但是你不能使用+、－运算例子

2016-08-17 16:07:22 785 1

原创深度学习在NLP中的应用

1. 引言文本分类这个在NLP领域是一个很普通而应用很广的课题，而且已经有了相当多的研究成果，比如应用很广泛的基于规则特征的SVM分类器，以及加上朴素贝叶斯方法的SVM分类器，当然还有最大熵分类器、基于条件随机场来构建依赖树的分类方法。在传统的文本分类词袋模型中，在将文本转换成文本向量的过程中，往往会造成文本向量维度过大的问题，当然也有其他的压缩了维度的一些分类方法。还有一些是基于人工

2016-08-17 10:57:30 12029 2

原创 338. Counting Bits

Problem descriptionGiven a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1's in their binary representation and return them as an array.Exam

2016-08-16 17:24:42 1076

原创 344. Reverse String

Problem descriptionWrite a function that takes a string as input and returns the string reversed.Example:Given s = "hello", return "olleh".题目描述：编写一个函数，输入是一个字符串，输出是该字符串的逆序。例子：输入：“Hello”，返

2016-08-16 16:52:27 401

原创 Tensorflow系列——Saver的用法

Saver的用法1. Saver的背景介绍我们经常在训练完一个模型之后希望保存训练的结果，这些结果指的是模型的参数，以便下次迭代的训练或者用作测试。Tensorflow针对这一需求提供了Saver类。Saver类提供了向checkpoints文件保存和从checkpoints文件中恢复变量的相关方法。Checkpoints文件是一个二进制文件，它把变量名映射到对应的te

2016-06-21 17:17:36 89078 29

原创 TensorFlow0.7 的安装

可以使用二进制包, 或者使用源代码, 安装 TensorFlow。本文采用二进制包安装。二进制安装TensorFlow Python API 依赖 Python 2.7 版本.在 Linux 和 Mac 下最简单的安装方式, 是使用 pip 安装.Ubuntu/Linux# 仅使用 CPU 的版本sudo pip install https://storage.goo

2016-04-14 16:24:44 2886 2

原创 Failed to compile cuda_ndarray.cu: libcublas.so.7.5: cannot open shared object file

最近再用theano的时候偶尔遇到这个问题Failed to compile cuda_ndarray.cu: libcublas.so.7.5: cannot open shared object file解决办法：在终端输入 sudo ldconfig /usr/local/cuda-7.5/lib64

2016-04-07 21:00:02 3205 1

原创 linux 命令之 nohup

nohup命令：如果你正在运行一个进程，而且你觉得在退出帐户时该进程还不会结束，那么可以使用nohup命令。该命令可以在你退出帐户/关闭终端之后继续运行相应的进程。nohup就是不挂断的意思( no hang up)。该命令的一般形式为：nohup command &如果使用nohup命令提交作业，那么在缺省情况下该作业的所有输出都被重定向到一个名为nohup.out的文件中，除非另外

2016-03-16 15:26:20 534

原创 RNNLM的使用方法

最近做的一个项目要用到语言模型，在网上找了一些开源的工具包试了一下。废话不多说，下面直接介绍一下 RNNLM的安装方法。我实在ubuntu14.04底下使用SRILM。 SRILM的下载地址（我使用的是rnnlm-0.4b版本）1、编译解压缩之后，在终端中进入所在目录，输入以下命令make有可能会出现如下错误：make: x86_64-linux

2016-03-04 15:12:42 8275 5

原创 Java解决读文件、写文件乱码

读文件File f = new File(fileName);InputStreamReader read = new InputStreamReader(new FileInputStream(f),"gbk"); BufferedReader reader=new BufferedReader(read);写文件File f = new File(fileName)

2016-03-04 11:47:47 694

原创 SRILM的安装方法

make World 最近做的一个项目要用到语言模型，在网上找了一些开源的工具包试了一下。废话不多说，下面直接介绍一下SRILM的安装方法。我实在ubuntu14.04底下使用SRILM。 SRILM的下载地址（我使用的是1.7.1版本）1、安装 tcl 有用SRILM要用到tcl工具的一些功能，所以我先装了tcl。 tcl的下载地址（我使用的是 tc

2016-03-02 16:38:45 10714 3

原创 SRILM的使用方法

1、从语料库中生成n-gram计数文件：ngram-count -text train.txt -order 3 -write train.txt.count-text指向输入文件-order指向生成几元的n-gram,即n-write指向输出文件2、从上一步生成的计数文件中训练语言模型：ngram-count -read train.txt.cou

2016-03-02 16:20:30 6181

原创 Eclipse下JGibbLDA使用总结

最近在用LAD做词语间相似度的计算，之前一直用GibbsLDA（C++版本）在linux服务器上运行，后来发现有个java版本的，随转用java版本。下面首先介绍一下使用方法，然后说一说使用过程中遇到的问题。（1）导入工程首先从http://sourceforge.net/projects/jgibblda/下载GibbsLDA工程，然后解压缩在Eclipse的工作空间下。在file下点击

2015-04-03 10:31:46 3217 5

原创让Dev C++支持C++11

1.先在dev的【工具】里找到【编译选项】2.一开始普遍的dev应该都是以下这个界面，在【编译时加入以下命令】栏是空白的且没有打钩。3.奇迹就在此刻改变.在这个【编译时加入以下命令】处打钩,然后在空白栏输入【-std=c++11】,确定.然后就能支持c++11

2015-03-25 21:52:56 62393 39

数据库系统概念Database System Concept（英文第6版）文字版

Database System Concepts——数据库系统概念第六版（英文版）作者： Abraham Silberschatz (Yale University) Henry F. Korth (Lehigh University) S. Sudarshan (Indian Institute of Technology, Bombay) 本书目录： Chapter 1 Introduction 1.1 Database-System Applications 1 1.2 Purpose of Database Systems 3 1.3 View of Data 6 1.4 Database Languages 9 1.5 Relational Databases 12 1.6 Database Design 15 1.7 Data Storage and Querying 20 1.8 Transaction Management 22 1.9 Database Architecture 23 1.10 Data Mining and Information Retrieval 25 1.11 Specialty Databases 26 1.12 Database Users and Administrators 27 1.13 History of Database Systems 29 1.14 Summary 31 Exercises 33 Bibliographical Notes 35 Chapter 2 Introduction to the RelationalModel 2.1 Structure of Relational Databases 39 2.2 Database Schema 42 2.3 Keys 45 2.4 Schema Diagrams 46 2.5 Relational Query Languages 47 2.6 Relational Operations 48 2.7 Summary 52 Exercises 53 Bibliographical Notes 55 Chapter 3 Introduction to SQL 3.1 Overview of the SQL Query Language 57 3.2 SQL Data Definition 58 3.3 Basic Structure of SQL Queries 63 3.4 Additional Basic Operations 74 3.5 Set Operations 79 3.6 Null Values 83 3.7 Aggregate Functions 84 3.8 Nested Subqueries 90 3.9 Modification of the Database 98 3.10 Summary 104 Exercises 105 Bibliographical Notes 112 Chapter 4 Intermediate SQL 4.1 Join Expressions 113 4.2 Views 120 4.3 Transactions 127 4.4 Integrity Constraints 128 4.5 SQL Data Types and Schemas 136 4.6 Authorization 143 4.7 Summary 150 Exercises 152 Bibliographical Notes 156 Chapter 5 Advanced SQL 5.1 Accessing SQL From a Programming Language 157 5.2 Functions and Procedures 173 5.3 Triggers 180 5.4 Recursive Queries 187 5.5 Advanced Aggregation Features 192 5.6 OLAP 197 5.7 Summary 209 Exercises 211 Bibliographical Notes 216 Chapter 6 Formal Relational Query Languages 6.1 The Relational Algebra 217 6.2 The Tuple Relational Calculus 239 6.3 The Domain Relational Calculus 245 6.4 Summary 248 Exercises 249 Bibliographical Notes 254 Chapter 7 Database Design and the E-R Model 7.1 Overview of the Design Process 259 7.2 The Entity-Relationship Model 262 7.3 Constraints 269 7.4 Removing Redundant Attributes in Entity Sets 272 7.5 Entity-Relationship Diagrams 274 7.6 Reduction to Relational Schemas 283 7.7 Entity-Relationship Design Issues 290 7.8 Extended E-R Features 295 7.9 Alternative Notations for Modeling Data 304 7.10 Other Aspects of Database Design 310 7.11 Summary 313 Exercises 315 Bibliographical Notes 321 Chapter 8 Relational Database Design 8.1 Features of Good Relational Designs 323 8.2 Atomic Domains and First Normal Form 327 8.3 Decomposition Using Functional Dependencies 329 8.4 Functional-Dependency Theory 338 8.5 Algorithms for Decomposition 348 8.6 Decomposition Using Multivalued Dependencies 355 8.7 More Normal Forms 360 8.8 Database-Design Process 361 8.9 Modeling Temporal Data 364 8.10 Summary 367 Exercises 368 Bibliographical Notes 374 Chapter 9 Application Design and Development 9.1 Application Programs and User Interfaces 375 9.2 Web Fundamentals 377 9.3 Servlets and JSP 383 9.4 Application Architectures 391 9.5 Rapid Application Development 396 9.6 Application Performance 400 9.7 Application Security 402 9.8 Encryption and Its Applications 411 9.9 Summary 417 Exercises 419 Bibliographical Notes 426 Chapter 10 Storage and File Structure 10.1 Overview of Physical Storage Media 429 10.2 Magnetic Disk and Flash Storage 432 10.3 RAID 441 10.4 Tertiary Storage 449 10.5 File Organization 451 10.6 Organization of Records in Files 457 10.7 Data-Dictionary Storage 462 10.8 Database Buffer 464 10.9 Summary 468 Exercises 470 Bibliographical Notes 473 Chapter 11 Indexing and Hashing 11.1 Basic Concepts 475 11.2 Ordered Indices 476 11.3 B+-Tree Index Files 485 11.4 B+-Tree Extensions 500 11.5 Multiple-Key Access 506 11.6 Static Hashing 509 11.7 Dynamic Hashing 515 11.8 Comparison of Ordered Indexing and Hashing 523 11.9 Bitmap Indices 524 11.10 Index Definition in SQL 528 11.11 Summary 529 Exercises 532 Bibliographical Notes 536 Chapter 12 Query Processing 12.1 Overview 537 12.2 Measures of Query Cost 540 12.3 Selection Operation 541 12.4 Sorting 546 12.5 Join Operation 549 12.6 Other Operations 563 12.7 Evaluation of Expressions 567 12.8 Summary 572 Exercises 574 Bibliographical Notes 577 Chapter 13 Query Optimization 13.1 Overview 579 13.2 Transformation of Relational Expressions 582 13.3 Estimating Statistics of Expression Results 590 13.4 Choice of Evaluation Plans 598 13.5 Materialized Views 607 13.6 Advanced Topics in Query Optimization 612 13.7 Summary 615 Exercises 617 Bibliographical Notes 622 Chapter 14 Transactions 14.1 Transaction Concept 627 14.2 A Simple Transaction Model 629 14.3 Storage Structure 632 14.4 Transaction Atomicity and Durability 633 14.5 Transaction Isolation 635 14.6 Serializability 641 14.7 Transaction Isolation and Atomicity 646 14.8 Transaction Isolation Levels 648 14.9 Implementation of Isolation Levels 650 14.10 Transactions as SQL Statements 653 14.11 Summary 655 Exercises 657 Bibliographical Notes 660 Chapter 15 Concurrency Control 15.1 Lock-Based Protocols 661 15.2 Deadlock Handling 674 15.3 Multiple Granularity 679 15.4 Timestamp-Based Protocols 682 15.5 Validation-Based Protocols 686 15.6 Multiversion Schemes 689 15.7 Snapshot Isolation 692 15.8 Insert Operations, Delete Operations, and Predicate Reads 697 15.9 Weak Levels of Consistency in Practice 701 15.10 Concurrency in Index Structures 704 15.11 Summary 708 Exercises 712 Bibliographical Notes 718 Chapter 16 Recovery System 16.1 Failure Classification 721 16.2 Storage 722 16.3 Recovery and Atomicity 726 16.4 Recovery Algorithm 735 16.5 Buffer Management 738 16.6 Failure with Loss of Nonvolatile Storage 743 16.7 Early Lock Release and Logical Undo Operations 744 16.8 ARIES 750 16.9 Remote Backup Systems 756 16.10 Summary 759 Exercises 762 Bibliographical Notes 766 Chapter 17 Database-System Architectures 17.1 Centralized and Client–Server Architectures 769 17.2 Server System Architectures 772 17.3 Parallel Systems 777 17.4 Distributed Systems 784 17.5 Network Types 788 17.6 Summary 791 Exercises 793 Bibliographical Notes 794 Chapter 18 Parallel Databases 18.1 Introduction 797 18.2 I/O Parallelism 798 18.3 Interquery Parallelism 802 18.4 Intraquery Parallelism 803 18.5 Intraoperation Parallelism 804 18.6 Interoperation Parallelism 813 18.7 Query Optimization 814 18.8 Design of Parallel Systems 815 18.9 Parallelism on Multicore Processors 817 18.10 Summary 819 Exercises 821 Bibliographical Notes 824 Chapter 19 Distributed Databases 19.1 Homogeneous and Heterogeneous Databases 825 19.2 Distributed Data Storage 826 19.3 Distributed Transactions 830 19.4 Commit Protocols 832 19.5 Concurrency Control in Distributed Databases 839 19.6 Availability 847 19.7 Distributed Query Processing 854 19.8 Heterogeneous Distributed Databases 857 19.9 Cloud-Based Databases 861 19.10 Directory Systems 870 19.11 Summary 875 Exercises 879 Bibliographical Notes 883 Chapter 20 DataWarehousing andMining 20.1 Decision-Support Systems 887 20.2 DataWarehousing 889 20.3 Data Mining 893 20.4 Classification 894 20.5 Association Rules 904 20.6 Other Types of Associations 906 20.7 Clustering 907 20.8 Other Forms of Data Mining 908 20.9 Summary 909 Exercises 911 Bibliographical Notes 914 Chapter 21 Information Retrieval 21.1 Overview 915 21.2 Relevance Ranking Using Terms 917 21.3 Relevance Using Hyperlinks 920 21.4 Synonyms, Homonyms, and Ontologies 925 21.5 Indexing of Documents 927 21.6 Measuring Retrieval Effectiveness 929 21.7 Crawling and Indexing the Web 930 21.8 Information Retrieval: Beyond Ranking of Pages 931 21.9 Directories and Categories 935 21.10 Summary 937 Exercises 939 Bibliographical Notes 941 Chapter 22 Object-Based Databases 22.1 Overview 945 22.2 Complex Data Types 946 22.3 Structured Types and Inheritance in SQL 949 22.4 Table Inheritance 954 22.5 Array and Multiset Types in SQL 956 22.6 Object-Identity and Reference Types in SQL 961 22.7 Implementing O-R Features 963 22.8 Persistent Programming Languages 964 22.9 Object-Relational Mapping 973 22.10 Object-Oriented versus Object-Relational 973 22.11 Summary 975 Exercises 976 Bibliographical Notes 980 Chapter 23 XML 23.1 Motivation 981 23.2 Structure of XML Data 986 23.3 XML Document Schema 990 23.4 Querying and Transformation 998 23.5 Application Program Interfaces to XML 1008 23.6 Storage of XML Data 1009 23.7 XML Applications 1016 23.8 Summary 1019 Exercises 1021 Bibliographical Notes 1024 PART EIGHT ADVANCED TOPICS Chapter 24 Advanced Application Development 24.1 Performance Tuning 1029 24.2 Performance Benchmarks 1045 24.3 Other Issues in Application Development 1048 24.4 Standardization 1051 24.5 Summary 1056 Exercises 1057 Bibliographical Notes 1059 Chapter 25 Spatial and Temporal Data andMobility 25.1 Motivation 1061 25.2 Time in Databases 1062 25.3 Spatial and Geographic Data 1064 25.4 Multimedia Databases 1076 25.5 Mobility and Personal Databases 1079 25.6 Summary 1085 Exercises 1087 Bibliographical Notes 1089 Chapter 26 Advanced Transaction Processing 26.1 Transaction-Processing Monitors 1091 26.2 TransactionalWorkflows 1096 26.3 E-Commerce 1102 26.4 Main-Memory Databases 1105 26.5 Real-Time Transaction Systems 1108 26.6 Long-Duration Transactions 1109 26.7 Summary 1115 Exercises 1117 Bibliographical Notes 1119 Chapter 27 PostgreSQL 27.1 Introduction 1123 27.2 User Interfaces 1124 27.3 SQL Variations and Extensions 1126 27.4 Transaction Management in PostgreSQL 1137 27.5 Storage and Indexing 1146 27.6 Query Processing and Optimization 1151 27.7 System Architecture 1154 Bibliographical Notes 1155 Chapter 28 Oracle 28.1 Database Design and Querying Tools 1157 28.2 SQL Variations and Extensions 1158 28.3 Storage and Indexing 1162 28.4 Query Processing and Optimization 1172 28.5 Concurrency Control and Recovery 1180 28.6 System Architecture 1183 28.7 Replication, Distribution, and External Data 1188 28.8 Database Administration Tools 1189 28.9 Data Mining 1191 Bibliographical Notes 1191 Chapter 29 IBM DB2 Universal Database 29.1 Overview 1193 29.2 Database-Design Tools 1194 29.3 SQL Variations and Extensions 1195 29.4 Storage and Indexing 1200 29.5 Multidimensional Clustering 1203 29.6 Query Processing and Optimization 1207 29.7 Materialized Query Tables 1212 29.8 Autonomic Features in DB2 1214 29.9 Tools and Utilities 1215 29.10 Concurrency Control and Recovery 1217 29.11 System Architecture 1219 29.12 Replication, Distribution, and External Data 1220 29.13 Business Intelligence Features 1221 Bibliographical Notes 1222 Chapter 30 Microsoft SQL Server 30.1 Management, Design, and Querying Tools 1223 30.2 SQL Variations and Extensions 1228 30.3 Storage and Indexing 1233 30.4 Query Processing and Optimization 1236 30.5 Concurrency and Recovery 1241 30.6 System Architecture 1246 30.7 Data Access 1248 30.8 Distributed Heterogeneous Query Processing 1250 30.9 Replication 1251 30.10 Server Programming in .NET 1253 30.11 XML Support 1258 30.12 SQL Server Service Broker 1261 30.13 Business Intelligence 1263 Bibliographical Notes 1267

2016-01-05

Java开发实战经典(名师讲坛).李兴华

Java开发实战经典高清带书签,java开发实战经典是一本综合讲解Java核心技术的书籍，在书中使用大量的代码及案例进行知识点的分析与运用，并且给出一些比较成熟的开发步骤，帮助读者更好地进行Java的开发。

2014-11-14

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