Zipline Project

Zipline Data Storage Path

/Users/xxx/.zipline/data/quantopian-quandl

Zipline benchmark data download bug:

Issue: https://github.com/quantopian/zipline/issues/1965

Solution: https://github.com/pydata/pandas-datareader/commit/7d8803d9707b9bb710982397ad8984773295722b#comments

English Vocabularies

  1. progdigious
    very impressive
  2. Earnest
    very serious mentally
  3. Aloof
    keep distance from things
  4. Rupture
    break relationship with
  5. Demeanor
    the appearance to someone, the attitude to someone
  6. Shephered
    To guide
  7. Ostensible
    intended to display but not true
  8. Articulate
    express oneself clearly
  9. loath
    unwilling to do something againest one's own thinking
    11.Solace
    to give comfort in grief or misfortune
  10. Tranquil
    quiet and peaceful
  11. secular
    of or relating to physical world, not spiritual
  12. infidel
    a person who does not believe in religion
  13. Marvelous
    extremely good or enjoyable
  14. Rudimentary
    very basic
  15. Renaissance
    A period of time in Europe when culture and science are in a boom
  16. Scared
    worth of respect in a religion
  17. Embroil
    to throw someone into disorder
  18. Renown
    highly respected
  19. Unanimous
    Agreed by a crowd of people
  20. Injunction
    an order from court or other authority that something must be done
  21. Dissent
    To publicly disagree with opinions
  22. Proscribe
    Prohibit from doing something
  23. Deviate
    to stray from a principle or norm
  24. Cosmopolitan
    a person who have been different part of the world and know a wide range of things
  25. Disseminate
    to cause to go to many people / spread knowledge
  26. Vigilant
    Carefully watchful to avoid danger
  27. Inculpatory
    Imply guilt
  28. Exculpatory
    to clear from alleged fault or guilt
  29. Consensus
    widely consent inside a community
  30. Scum
    A layer of something unpleasant or unwanted that forms on top of a liquid
  31. Revelation
    a usually secret fact that is made known
  32. Barrage
    a bar placed at a water course to increase the depth of the water
  33. Collision
    secret cooperation with someone for a dishonst purpose
  34. Subpoena
    a written order that command someone to appear on court
  35. Obsessive
    thinking about something or someone in a way that is too much
  36. Solidarity
    A feeling of unity between people who have the same interests, goals , etc
  37. Secular
    Not overtly or specificially religious
  38. Innertie
    The tendency to stay in the current position or movement
  39. Endogenous
    Having an internal cause or origin
  40. endowment
    the action of endowing something or someone.
  41. prelude
    prevent from happening
  42. Quid Pro Quo
    Exchange of benefits (negative word)
  43. Propensity
    an inclination or natural tendency to behave in a particular way
  44. Heresy
    An belief that is strongly at variance with established customs of beliefs
  45. Caveat
    Formal warning regarding specific issues.
  46. Tranquil
    free from disturbance; calm
  47. Ex post
    based on actual results rather than forecasts.
  48. ex ante
    based on forecasts rather than actual results.
  49. contemplate
    Think, consider
  50. deter
    discourage from doing something
  51. obliterate
    destroy utterly; wipe out
  52. brace
    a device that clamps things tight together.
  53. delinquent
    showing or characterized by a tendency to commit a minor crime.
  54. perimeter
    Boundary, confines, edges
  55. Annihilate
    Destory utterly; completely removal
  56. arm’s-length transaction
    A transaction that both party are participating out of pure self-interest, under no pressure.
  57. idiosyncratic
    quirky, peculiar
  58. contrarian
    A person who opposes popular opinions in the market
  59. succumb
    to yield to superior strength or force or overpowering appeal or desire
  60. sift
    to seperate or seperate out
  61. pundit
    a person who gives opinions in an authoritative manner usually through the mass media
  62. aberration
    rarity, exceptions
  63. repudiates
    Discard, refuse, deny
  64. prudence
    The ability to govern and discipline oneself by the use of reason
  65. elusive
    hard to comprehend or define
  66. epitomize
    Examplify, make the example of something
  67. appraisal
    An estimation of something; an expert assessment on a particular subject
  68. resultant
    derived from or resulting from something
  69. Allusion
    In indirect reference to something
  70. Captious
    An often ill-natured inclination to stress faults and raise objections
  71. Encumber
    weight-down, burden; to impede or hammer the function or activity of something
  72. Encumberance
    A claim against property
  73. Ample
    more than adeguate, more than enough
    76.Vex
    to bring trouble, pain and agitation to; to bring physical distress to
  74. Stringent
    marked by rigor, strictness or severity; marked by money scarcity and credit strictness
  75. preponderant
    have superior force, power; having greater influence
  76. precipitate
    to bring about abruptly, result in
  77. premise
    a proposition antedecentally supposed or proved as a basis of argument or inference
  78. Depressive
    tending to depress
  79. Daunt
    tending to be overwhelm or intimidate
  80. Tread
    to step or walk on or over; to walk or proceed along

how to deal with situations when team members are not qualified enough to do the job on schedule, is a problem faced by many mangers in technology field. It is not without budget to hire qualified developer, but not enough prospective canadaicates to interview with. The technology industry is experiencing dramatic shortage in skilled workers.

MySQL Administration Memo

Database Backup

  1. Command Used to back up a database in Linux

mysqldump -u root -p edusoho > edusoho.sql

  1. MySQL Directory Layout

If install from rpm package, the .lib .h and all other type of files are placed by rpm into the corresponding directories

If install by uncompressing a tar, the mysql directory layout will be preserved.

  1. MySQL Command

mysql > show processlist;

mysql > show status;

人工智能产业特点

在中国现有的市场环境下,成功的高端技术品牌(科大讯飞、微软小冰等)几乎全部依赖公关宣传、包装和炒作来积累品牌形象,而不是依靠产品的口碑传播。在高大上的宣传口径下,产品的销售却依赖免费使用或长期试用策略。

面向B端的高端技术产品需要有长期、大量的研发投资,产品天然有高成本、高附加值属性。在市场上,高端产品普遍意味着高昂的价格,但在人工智能产业,这一准则却面临失效。具有极高技术门槛的人工智能产品却往往被免费、低价推广,原因在哪里?

从产品形态上看,我们可以发现人工智能产品同样遵循互联网产品的交付规律,即具有极低的边际成本。但由于人工智能产品大多面向B端,不具有利用用户流量效应带来未来广告和其他业务收益这样的盈利机会,为何要不顾品牌形象,以低价或免费策略推广。

 

现有的人工智能高端技术人才的甄选,普遍以学术成就为衡量标准,而不是成功的产品开发经验为准绳。一部分原因是现有的产业阶段以技术研发为重,另一部分原因是市场上缺乏经过验证的成功产品。(空降式科学家高管)