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  NLP lesson 2: sharp tools for Chinese word Segmentation jieba and HanLP

  The preface starts from this article, we enter the actual combat part. First of all, we obtain the corpus according to the first step of the Chinese natural language processing process, and then focus on the learning of Chinese word segmentation. There are many kinds of Chinese word segmentation, such as NLPIR, Institute of Computing, Chinese Academy of Sciences, LTP, Harbin Institute of Technology, and TH of Tsinghua University.

  2022-06-01 06:00:53 Views: 236
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  Reasons for applying the card

  Reasons for the application card on September 27th, 2016: 1. Check the CPU load of the application server-top, memory usage-free-m. 2. Check the CPU load and memory usage of the database. 3. There is a redis server. Check whether the redis cache is available.

  2022-06-01 06:00:32 Views: 267
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  Overview of mysql btree Index

  Today, take a look at B-tree indexes in mysql. Through this article, you can learn the principle of btree indexes in mysql, the process of retrieving data, the differences between btree indexes in innodb and myisam engines, and the benefits of btree indexes.

  2022-06-01 06:00:32 Views: 308
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  Could not find first log file name in binary log index file

  On July 17, 2015, when I was doing the master-slave switching experiment with a script, I saw that there was an error on the slave: Could not find first log file name in binary log index file <

  2022-06-01 06:00:32 Views: 214
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  Consideration of logical backup under Oracle active and standby Architecture

  Today, I think of a question: if there is an environment with one master and one standby architecture, how to plan and consider how to make a logical backup according to the business needs. I think it's an interesting question when considering the performance of the database version of 10g force 11g. First of all, the logical backup tool is in the process.

  2022-06-01 06:00:31 Views: 283
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  Oracle vs PostgreSQL Develop (19)-PIPE ROW

  Oracle's PL/SQL provides the Pipelined Table Functions feature to return multiple rows of data to the caller, which can effectively improve performance. In PostgreSQL, you can use SETOF or RET in a function

  2022-06-01 06:00:29 Views: 297
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  Where 1 # 1

  The article is reproduced from the developer Round Table, what is the use of the Wechat official account where 1, which is about the introduction, advancement and trampling of developers? In SQL language, writing such a sentence is the same as not writing it, so why do you want to be thankless? Select * from table1 w

  2022-06-01 06:00:29 Views: 310
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  How does the MHA High availability Architecture work? Main library downtime process

  Main library downtime process 1. Monitor node (get all node information through configuration file) system, network, SSH connectivity master-slave status, focusing on master library 2. Select the master (1) if you judge the slave database (position or GTID), the data is different and is closest to Mast.

  2022-06-01 06:00:28 Views: 250
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  PostgreSQL Source Code interpretation-query # 94 (Syntax Analysis: gram.y) # 3

  This section continues to introduce the third part of PostgreSQL's parsing definition file, gram.y, Productions (production) .Bison input file composition:% {Declarations%} Definitions%%Produ

  2022-06-01 06:00:28 Views: 299
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  PHP's custom function for Mysql operation

  2022-06-01 06:00:25 Views: 299
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  Depth | the storage cost of real-time history database is amazing, how to break it?

  Author: Hu Dao Ali Yun Operation and maintenance expert Zhouji Ali Yun solution architect Real-time History Library requirement background in today's digital age, with the rapid development of business, the amount of data generated every day will be an astonishing amount. The cost of database storage will become higher and higher, and the usual practice is for historical data.

  2022-06-01 06:00:25 Views: 271
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  PostgreSQL Source Code interpretation (83)-query statement # 68 (PortalStart function)

  This section introduces the PortalStart function, which is called in create_simple_query to initialize information in the portal structure before execution. 1. The data structure Portal includes scene PortalStrateg

  2022-06-01 06:00:24 Views: 222
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  Sql environment elimination ^ H method (semi-original)

  1. Before entering sqlplus, set deletion. Before entering sqlplus, execute the following command in the current terminal: stty erase'^ H'. Stty: modify terminal parameters. If you don't want to type this command every time you enter the terminal

  2022-06-01 06:00:20 Views: 307
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  The method of skipping transactions by the replicat process of ogg

  This article mainly describes how 1.ogg skips the key role of transaction 2.logdump in transaction search replication process abendedGGSCI (ORALTDB.eastmoney.com.sh) 12 > info allPro

  2022-06-01 06:00:20 Views: 236
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  Oracle 11g RAC method for generating AWR report

  Oracle 11g RAC generates AWR report method 1. Generate a single instance AWR report: @ $ORACLE_HOME/rdbms/admin/awrrpt.sql2. Generate Oracle RAC AWR report: @

  2022-06-01 06:00:19 Views: 309
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  11GR2RAC lost OCR and CONTROLFILE reconstruction recovery process

  Today, I was going to do some experiments with my own rac virtual machine, but when the virtual machine was pulled up, I frequently reported errors. I guess I didn't need it for a long time (some time ago, some manufacturers came to promote virtualization and all tested on that). One by one, I found that there was something wrong with OCR, so there was no way to rebuild it. By the way, record the reconstruction process 1.

  2022-06-01 06:00:15 Views: 287
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  [Warning] TIMESTAMP with implicit DEFAULT-- explicit_defaults_for_timestamp

  If you want to do some experiments on MySQL on September 25, 2014, you can report an error when you log in (ps:mysql service is already enabled): window 7 64-bit, MySQL 5.7log: click (here) to collapse or open 2014-09-25

  2022-06-01 06:00:15 Views: 286
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  The method of returning one or N records by MongoDB random query

  Use the $sample (aggregation) method. The specific command is: db.collection.aggregate ([{$sample: {size: n}}]) N is the number of entries. For example, 5 entries are returned: >

  2022-06-01 06:00:15 Views: 285
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  Investigation on the Master-Slave handover Strategy of mycat read-write Separation

  When the slave database is down, all read requests will be transferred to the main database, which will have no impact on the business. 2. At present, only one master library is set in our writehost when the main library goes down. When the main library goes down, all read and write requests through mycat will report errors, as shown below: read request: mysql >

  2022-06-01 06:00:12 Views: 320
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  [in depth] Architecture-003-SCN

  1. Introduction 2, category 3, SCN and database startup 4, SCN and database shutdown

  2022-06-01 06:00:07 Views: 247