papering - 博客园

2017年11月15日

摘要： class Student():... name = 'Student'...s = Student() # 创建实例sprint(s.name) # 打印name属性，因为实例并没有name属性，所以会继续查找class的name属性Studentprint(Student.name) # 打印类阅读全文

posted @ 2017-11-15 09:51 papering 阅读(210) 评论(0) 推荐(0)

研究数据集

摘要： http://www.sogou.com/labs/resource/list_yuliao.php 阅读全文

posted @ 2017-11-15 00:25 papering 阅读(175) 评论(0) 推荐(0)

2017年11月14日

static 静态域类域静态方法工厂方法 he use of the static keyword to create fields and methods that belong to the class, rather than to an instance of the class 非访问修饰符

摘要：总结： 1、无论一个类实例化多少对象，它的静态变量只有一份拷贝；静态域属于类，而非由类构造的实例化的对象，所有类的实例对象共享静态域。 class Employee { private static int nextId = 1; private int id; ... } 静态变量静态常量 p 阅读全文

posted @ 2017-11-14 22:15 papering 阅读(321) 评论(0) 推荐(0)

accessor mothod mutator mothod 更改器方法访问器方法类的方法可以访问类的任何一个对象的私有域!

摘要： LocalDate.plusDate String.toUpperCase GregorianCalendar.add 阅读全文

posted @ 2017-11-14 19:12 papering 阅读(464) 评论(0) 推荐(0)

上钻下钻切片转轴降采样

摘要：【数据技巧1】手把手教你用容器实现下钻 https://mp.weixin.qq.com/s/l0iIUi6Jl9UuXxgQoXXM-A 数据分析工作中，尤其在做数据汇报时，难免需要做多层级的精准报告，仪表板里的数据下钻就显得格外重要。以往，我们习惯通过筛选去下钻、或通过视图去筛选，你有没有想到其阅读全文

posted @ 2017-11-14 12:01 papering 阅读(379) 评论(0) 推荐(0)

2017年11月13日

识别会话

摘要：识别：访问者来源、会话、访问者 HTTP 安全套接字层SSL ：包含访问者的登录活动和加密密钥的交换动态网页：在返回给访问者的每个网页中隐藏一个会话ID的字段来维护访问者状态阅读全文

posted @ 2017-11-13 22:59 papering 阅读(224) 评论(0) 推荐(0)

Performance Tuning Using Linux Process Management Commands

摘要： [root@bigdata-server-02 /]# ps --help all Usage: ps [options] Basic options: -A, -e all processes -a all with tty, except session leaders a all with t 阅读全文

posted @ 2017-11-13 19:27 papering 阅读(334) 评论(0) 推荐(0)

Secure Hash Algorithm 3

摘要： https://en.wikipedia.org/wiki/SHA-3 阅读全文

posted @ 2017-11-13 19:01 papering 阅读(206) 评论(0) 推荐(0)

grouped differently across partitions

摘要：【熵增】由无序到有序 http://spark.apache.org/docs/latest/rdd-programming-guide.html#shuffle-operations Shuffle operations Certain operations within Spark trigg 阅读全文

posted @ 2017-11-13 17:46 papering 阅读(202) 评论(0) 推荐(0)

spark 划分stage Wide vs Narrow Dependencies 窄依赖宽依赖解析作业 job stage 阶段 RDD有向无环图拆分任务 Task 网络传输和计算开销任务集 taskset

摘要：每个job被划分为多个stage。划分stage的一个主要依据是当前计算因子的输入是否是确定的，如果是则将其分在同一个stage，从而避免多个stage之间的消息传递开销。 http://spark.apache.org/docs/latest/rdd-programming-guide.html 阅读全文

posted @ 2017-11-13 16:15 papering 阅读(445) 评论(0) 推荐(0)

存储引擎查询引擎去耦合

摘要： data warehouse 阅读全文

posted @ 2017-11-13 14:16 papering 阅读(132) 评论(0) 推荐(0)

Use Apache HBase™ when you need random, realtime read/write access to your Big Data.

摘要： Apache HBase™ is the Hadoop database, a distributed, scalable, big data store. Use Apache HBase™ when you need random, realtime read/write access to y 阅读全文

posted @ 2017-11-13 14:12 papering 阅读(187) 评论(0) 推荐(0)

DevOps

摘要： https://en.wikipedia.org/wiki/DevOps DevOps (a clipped compound of "development" and "operations") is a software engineering practice that aims at uni 阅读全文

posted @ 2017-11-13 11:29 papering 阅读(274) 评论(0) 推荐(0)

2017年11月12日

5 Ways to Make Your Hive Queries Run Faster

摘要： 5 Ways to Make Your Hive Queries Run Faster Technique #1: Use Tez Hive can use the Apache Tez execution engine instead of the venerable Map-reduce eng 阅读全文

posted @ 2017-11-12 13:19 papering 阅读(208) 评论(0) 推荐(0)

2017年11月11日

r squared

摘要： multiple r squared adjusted r squared http://web.maths.unsw.edu.au/~adelle/Garvan/Assays/GoodnessOfFit.html Goodness-of-Fit Statistics Sum of Squares 阅读全文

posted @ 2017-11-11 20:37 papering 阅读(459) 评论(0) 推荐(0)

p value

摘要： https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2895822/ In Brief: The P Value: What Is It and What Does It Tell You? Frederick Dorey, PhD Author informa 阅读全文

posted @ 2017-11-11 18:55 papering 阅读(406) 评论(0) 推荐(0)

spark streaming bathsize 5-2000ms storm 100ms

摘要：延迟阅读全文

posted @ 2017-11-11 09:08 papering 阅读(175) 评论(0) 推荐(0)

storm记录级容错 acker

摘要： tuple 每个处理路径阅读全文

posted @ 2017-11-11 09:04 papering 阅读(134) 评论(0) 推荐(0)

send data to Flume client-sdk flume使用之httpSource

摘要： https://flume.apache.org/FlumeDeveloperGuide.html#client-sdk flume使用之httpSource - CSDN博客 https://blog.csdn.net/liuxiao723846/article/details/78131732 阅读全文

posted @ 2017-11-11 01:27 papering 阅读(558) 评论(0) 推荐(0)

three supported reliability levels: * End-to-end * Store on failure * Best effort

摘要： https://github.com/cloudera/flume/blob/master/flume-docs/src/docs/UserGuide/Introduction 阅读全文

posted @ 2017-11-11 01:15 papering 阅读(258) 评论(0) 推荐(0)

SPDY: An experimental protocol for a faster web HTTP/2

摘要： http://www.chromium.org/spdy/spdy-whitepaper https://en.wikipedia.org/wiki/SPDY BGP DHCP DNS FTP HTTP HTTPS IMAP LDAP MGCP MQTT NNTP NTP POP ONC/RPC R 阅读全文

posted @ 2017-11-11 01:06 papering 阅读(359) 评论(0) 推荐(0)

Quick UDP Internet Connections

摘要： https://blog.chromium.org/2013/06/experimenting-with-quic.html user datagram protocol transport layer security 阅读全文

posted @ 2017-11-11 01:03 papering 阅读(192) 评论(0) 推荐(0)

MQTT协议

摘要：翻译搜索复制阅读全文

posted @ 2017-11-11 00:31 papering 阅读(116) 评论(0) 推荐(0)

2017年11月10日

In Git, there are two main ways to integrate changes from one branch into another: the merge and the rebase.

摘要： https://git-scm.com/book/en/v2/Git-Branching-Rebasing 阅读全文

posted @ 2017-11-10 22:03 papering 阅读(160) 评论(0) 推荐(0)

5 Ways to Send Email From Linux Command Line

摘要： https://tecadmin.net/ways-to-send-email-from-linux-command-line/ We all know the importance of emails these days for information transfer. There are m 阅读全文

posted @ 2017-11-10 21:41 papering 阅读(324) 评论(0) 推荐(0)

假设检验正态性检验

摘要： https://baike.baidu.com/item//638320?fromModule=lemma_inlink 假设检验(hypothesis testing)，又称统计假设检验，是用来判断样本与样本、样本与总体的差异是由抽样误差引起还是本质差别造成的统计推断方法。显著性检验是假设检验中最阅读全文

posted @ 2017-11-10 15:21 papering 阅读(251) 评论(0) 推荐(0)

FICO credit score

摘要： http://www.bankrate.com/finance/credit/what-is-a-fico-score.aspx Anyone who’s ever thought about looking for a loan has inevitably encountered four fa 阅读全文

posted @ 2017-11-10 14:59 papering 阅读(396) 评论(0) 推荐(0)

2017年11月9日

lateral inhibition

摘要： http://www.indiana.edu/~p1013447/dictionary/lat_i.htm 【This means that neighboring visual neurons respond LESS if they are activated at the same time 阅读全文

posted @ 2017-11-09 21:20 papering 阅读(348) 评论(0) 推荐(0)

当半导体的工艺制程走到7nm后

摘要： https://mp.weixin.qq.com/s/LjFTtEKFX2o8kLjn3y6GbQ 深度学习的异构加速技术1：效率因通用而怠，构架为AI而生一方面，当半导体的工艺制程走到7nm后，已逼近物理极限，摩尔定律逐渐失效，导致CPU不再能像以前一样享受工艺提升带来的红利：通过更高的工艺，在阅读全文

posted @ 2017-11-09 19:24 papering 阅读(224) 评论(0) 推荐(0)

Splits a tensor into sub tensors

摘要： https://www.tensorflow.org/api_docs/python/tf/split 阅读全文

posted @ 2017-11-09 17:07 papering 阅读(243) 评论(0) 推荐(0)

Markov and Chebyshev Inequalities and the Weak Law of Large Numbers

摘要： https://www.math.wustl.edu/~russw/f10.math493/chebyshev.pdf http://www.tkiryl.com/Probability/Chapter%208.pdf http://mathworld.wolfram.com/ChebyshevIn 阅读全文

posted @ 2017-11-09 10:30 papering 阅读(232) 评论(0) 推荐(0)

sort_action

摘要： li, r = [23,8, 45, 5, 0, -6, 745,8, 8], [] while (len(li) > 0): loop_, min, tag = len(li), li[0], 0 for i in range(0, loop_, 1): chk = li[i] if min > chk: min,... 阅读全文

posted @ 2017-11-09 10:11 papering 阅读(233) 评论(0) 推荐(0)

jedis

摘要： jedis 阅读全文

posted @ 2017-11-09 08:03 papering 阅读(152) 评论(0) 推荐(0)

ClassNotFoundException

摘要： throws 阅读全文

posted @ 2017-11-09 00:14 papering 阅读(174) 评论(0) 推荐(0)

2017年11月7日

mysql-test-run.pl

摘要： wget https://raw.githubusercontent.com/mysql/mysql-server/5.7/mysql-test/mysql-test-run.pl 阅读全文

posted @ 2017-11-07 23:19 papering 阅读(357) 评论(0) 推荐(0)

mysql 5.6 bug

摘要： https://dev.mysql.com/doc/refman/5.6/en/account-management-sql.html USE mysql; SELECT Host,User FROM user; 【BUG】CREATE USER 'xx'@'%' IDENTIFIED BY 'yy 阅读全文

posted @ 2017-11-07 20:48 papering 阅读(296) 评论(0) 推荐(0)

The basic principle of test case 修改引擎

摘要： The basic principle of test case evaluation is that output resulting from running a test case is compared to the expected result. https://dev.mysql.co 阅读全文

posted @ 2017-11-07 17:35 papering 阅读(385) 评论(0) 推荐(0)

单线程多核多实例

摘要：持久性可伸缩性 Redis 阅读全文

posted @ 2017-11-07 02:04 papering 阅读(181) 评论(0) 推荐(0)

Redis persistence demystified

摘要： https://redis.io/topics/persistence http://oldblog.antirez.com/post/redis-persistence-demystified.html 阅读全文

posted @ 2017-11-07 01:12 papering 阅读(206) 评论(0) 推荐(0)

类型别名 Type Aliases

摘要： runtime\error.go // An errorString represents a runtime error described by a single string. type errorString string func (e errorString) RuntimeError( 阅读全文

posted @ 2017-11-07 00:26 papering 阅读(512) 评论(0) 推荐(0)