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def combination_2_n(l): n, r = len(l), [] for i in range(0, n, 1): s = i + 1 for ii in range(s, n, 1): r.append([l[i], l[ii]]) return r # l1, l2 = [...
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posted @ 2017-10-20 16:47
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import psycopg2 import threading conn_fmac = psycopg2.connect(database='filter_useless_mac', user='user', password='password', host='192.168.168.168', port='5432') d...
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posted @ 2017-10-20 10:02
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bagging bootstrap aggregation 装袋法 自助法聚集
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posted @ 2017-10-20 00:22
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posted @ 2017-10-19 23:56
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posted @ 2017-10-19 19:27
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m*n matrix m*n=1000 f(A)=25 https://www.cs.princeton.edu/courses/archive/spring12/cos598C/svdchapter.pdf finding the best k -dimensional subspace with
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posted @ 2017-10-19 18:51
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https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html Introduction The Hadoop Distributed File System (HDFS) is a distributed file system designed to
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posted @ 2017-10-19 10:45
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hive.spark.client.rpc.sasl.mechanisms DIGEST-MD5 Name of the SASL mechanism to use for authentication.
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posted @ 2017-10-19 09:42
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损失函数+惩罚函数 2阶导数 二阶导数_百度百科 https://baike.baidu.com/item/%E4%BA%8C%E9%98%B6%E5%AF%BC%E6%95%B0/1139067 second derivative 设 ,求 和 。 [6] 解:用导数定义求解: [6] 翻译 搜索
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posted @ 2017-10-19 08:09
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posted @ 2017-10-19 01:33
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布隆过滤器 http://pages.cs.wisc.edu/~cao/papers/summary-cache/node8.html A Bloom filter is a method for representing a set A of n elements (also called key
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posted @ 2017-10-18 21:47
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https://chenli.ics.uci.edu/files/icde2017-AsterixDB-Spatial-Comparison.pdf A Comparative Study of Log-Structured Merge-Tree-Based Spatial Indexes for
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posted @ 2017-10-18 20:43
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7.13. nonlocal 语句 nonlocal_stmt ::= "nonlocal" identifier ("," identifier)* nonlocal 语句会使得所列出的名称指向之前在最近的包含作用域中绑定的除全局变量以外的变量。 这种功能很重要,因为绑定的默认行为是先搜索局部命名
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posted @ 2017-10-18 20:05
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https://www.cs.umb.edu/~poneil/lsmtree.pdf 【Log-Structured Merge-Tree 】【结构化日志归并树】【要解决的问题】The Log-Structured Merge-Tree (LSM-Tree)https://www.cs.umb.ed
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posted @ 2017-10-18 19:23
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Dynamic programming https://people.eecs.berkeley.edu/~vazirani/algorithms/chap6.pdf
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posted @ 2017-10-18 18:55
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lk = ['oid', 'timestamp', 'signals', 'area', 'building', 'city', 'name', 'floor', 'industry', 'region', 'stress', 'longitude', 'latitud...
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posted @ 2017-10-18 17:01
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端口映射外网访问虚拟机linux
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posted @ 2017-10-17 19:18
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/etc/init.d/iptables stop systemctl stop firewalld.service [root@bigdata-server-01 myrestserver]# firewall-cmd --statenot running[root@bigdata-server-
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posted @ 2017-10-17 19:17
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posted @ 2017-10-17 17:13
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【粗暴的HIVE-SQL】select xyz from abc where ty='sdk' and ret_code=0 and data_source_type=1 and dt between '20171013' and '20171016' limit 1200000;一个手机几天就在同
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posted @ 2017-10-17 15:10
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posted @ 2017-10-17 08:41
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posted @ 2017-10-17 08:37
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posted @ 2017-10-17 01:25
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posted @ 2017-10-16 23:53
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posted @ 2017-10-16 23:38
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posted @ 2017-10-16 23:34
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elementary row and column operation
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posted @ 2017-10-16 23:25
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posted @ 2017-10-16 23:01
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https://research.google.com/archive/spanner.html Spanner is Google’s scalable, multi-version, globally- distributed, and synchronously-replicated data
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posted @ 2017-10-16 21:16
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posted @ 2017-10-16 16:16
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对于线性方程组Ax=b 对A和b执行同样的一串行初等运算, 那么该方程组的解集不发生变化。 【未知-已知 高阶--低阶】 http://mathworld.wolfram.com/CramersRule.html
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posted @ 2017-10-16 14:54
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leader 事务日志更新时间越新
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posted @ 2017-10-16 13:10
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posted @ 2017-10-16 12:58
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http://algs4.cs.princeton.edu/code/edu/princeton/cs/algs4/ http://algs4.cs.princeton.edu/code/edu/princeton/cs/algs4/BinarySearchST.java http://algs4.
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posted @ 2017-10-15 23:43
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http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html Why Use Nested Classes? Compelling reasons for using nested classes include the followi
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posted @ 2017-10-15 22:49
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【角色】0-MainProposer提案生成者1-提案发送者(MainProposer+OtherProposer)2-提案接收者(Acceptor)【动作】0-MainProposer >生成提案1-MainProposer+OtherProposer >发送[提案内容、提案编号]结构体至Acce
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posted @ 2017-10-15 21:16
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http://lamport.azurewebsites.net/pubs/pubs.html paper
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posted @ 2017-10-15 19:58
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2 prepare commit rollback acknowledge
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posted @ 2017-10-15 19:30
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posted @ 2017-10-15 19:09
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posted @ 2017-10-15 19:05
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