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摘要: 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 = [... 阅读全文
posted @ 2017-10-20 16:47 papering 阅读(222) 评论(0) 推荐(0)
摘要: import psycopg2 import threading conn_fmac = psycopg2.connect(database='filter_useless_mac', user='user', password='password', host='192.168.168.168', port='5432') d... 阅读全文
posted @ 2017-10-20 10:02 papering 阅读(248) 评论(0) 推荐(0)
摘要: bagging bootstrap aggregation 装袋法 自助法聚集 阅读全文
posted @ 2017-10-20 00:22 papering 阅读(151) 评论(0) 推荐(0)
摘要: Cassandra 阅读全文
posted @ 2017-10-19 23:56 papering 阅读(131) 评论(0) 推荐(0)
摘要: 协议 阅读全文
posted @ 2017-10-19 19:27 papering 阅读(205) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-19 18:51 papering 阅读(252) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-19 10:45 papering 阅读(304) 评论(0) 推荐(0)
摘要: hive.spark.client.rpc.sasl.mechanisms DIGEST-MD5 Name of the SASL mechanism to use for authentication. 阅读全文
posted @ 2017-10-19 09:42 papering 阅读(858) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-19 08:09 papering 阅读(294) 评论(0) 推荐(0)
摘要: RAM disk 阅读全文
posted @ 2017-10-19 01:33 papering 阅读(273) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-18 21:47 papering 阅读(185) 评论(0) 推荐(0)
摘要: https://chenli.ics.uci.edu/files/icde2017-AsterixDB-Spatial-Comparison.pdf A Comparative Study of Log-Structured Merge-Tree-Based Spatial Indexes for 阅读全文
posted @ 2017-10-18 20:43 papering 阅读(176) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-18 20:05 papering 阅读(122) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-18 19:23 papering 阅读(320) 评论(0) 推荐(0)
摘要: Dynamic programming https://people.eecs.berkeley.edu/~vazirani/algorithms/chap6.pdf 阅读全文
posted @ 2017-10-18 18:55 papering 阅读(143) 评论(0) 推荐(0)
摘要: lk = ['oid', 'timestamp', 'signals', 'area', 'building', 'city', 'name', 'floor', 'industry', 'region', 'stress', 'longitude', 'latitud... 阅读全文
posted @ 2017-10-18 17:01 papering 阅读(219) 评论(0) 推荐(0)
摘要: 端口映射外网访问虚拟机linux 阅读全文
posted @ 2017-10-17 19:18 papering 阅读(530) 评论(0) 推荐(0)
摘要: /etc/init.d/iptables stop systemctl stop firewalld.service [root@bigdata-server-01 myrestserver]# firewall-cmd --statenot running[root@bigdata-server- 阅读全文
posted @ 2017-10-17 19:17 papering 阅读(835) 评论(0) 推荐(0)
摘要: s3 阅读全文
posted @ 2017-10-17 17:13 papering 阅读(162) 评论(0) 推荐(0)
摘要: 【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 阅读全文
posted @ 2017-10-17 15:10 papering 阅读(188) 评论(0) 推荐(0)
摘要: Harvard 阅读全文
posted @ 2017-10-17 08:41 papering 阅读(172) 评论(0) 推荐(0)
摘要: 而非MySQL的trigger 阅读全文
posted @ 2017-10-17 08:37 papering 阅读(234) 评论(0) 推荐(0)
摘要: update 阅读全文
posted @ 2017-10-17 01:25 papering 阅读(159) 评论(0) 推荐(0)
摘要: A–>adjA 连续性 反函数 阅读全文
posted @ 2017-10-16 23:53 papering 阅读(415) 评论(0) 推荐(0)
摘要: nonsingular 阅读全文
posted @ 2017-10-16 23:38 papering 阅读(160) 评论(0) 推荐(0)
摘要: trAA*=0 阅读全文
posted @ 2017-10-16 23:34 papering 阅读(145) 评论(0) 推荐(0)
摘要: elementary row and column operation 阅读全文
posted @ 2017-10-16 23:25 papering 阅读(597) 评论(0) 推荐(0)
摘要: 因为 它不改变方向 阅读全文
posted @ 2017-10-16 23:01 papering 阅读(809) 评论(0) 推荐(0)
摘要: https://research.google.com/archive/spanner.html Spanner is Google’s scalable, multi-version, globally- distributed, and synchronously-replicated data 阅读全文
posted @ 2017-10-16 21:16 papering 阅读(278) 评论(0) 推荐(0)
摘要: 数据可视化的骨架是统计 阅读全文
posted @ 2017-10-16 16:16 papering 阅读(218) 评论(0) 推荐(0)
摘要: 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 阅读全文
posted @ 2017-10-16 14:54 papering 阅读(359) 评论(0) 推荐(0)
摘要: leader 事务日志更新时间越新 阅读全文
posted @ 2017-10-16 13:10 papering 阅读(131) 评论(0) 推荐(0)
摘要: Paxos 阅读全文
posted @ 2017-10-16 12:58 papering 阅读(180) 评论(0) 推荐(0)
摘要: http://algs4.cs.princeton.edu/code/edu/princeton/cs/algs4/ http://algs4.cs.princeton.edu/code/edu/princeton/cs/algs4/BinarySearchST.java http://algs4. 阅读全文
posted @ 2017-10-15 23:43 papering 阅读(166) 评论(0) 推荐(0)
摘要: http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html Why Use Nested Classes? Compelling reasons for using nested classes include the followi 阅读全文
posted @ 2017-10-15 22:49 papering 阅读(189) 评论(0) 推荐(0)
摘要: 【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 阅读全文
posted @ 2017-10-15 21:16 papering 阅读(145) 评论(0) 推荐(0)
摘要: http://lamport.azurewebsites.net/pubs/pubs.html paper 阅读全文
posted @ 2017-10-15 19:58 papering 阅读(177) 评论(0) 推荐(0)
摘要: 2 prepare commit rollback acknowledge 阅读全文
posted @ 2017-10-15 19:30 papering 阅读(225) 评论(0) 推荐(0)
摘要: ebay 阅读全文
posted @ 2017-10-15 19:09 papering 阅读(151) 评论(0) 推荐(0)
摘要: 理论证明 阅读全文
posted @ 2017-10-15 19:05 papering 阅读(166) 评论(0) 推荐(0)
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