中美百万人口城市[2004]

Net.Weblog.200402.txt

2004-02-10

US has different statistic standard in urban population counting. Only 9 cities are listed as one-million-population city

  • Los Angles,
  • San Diego,
  • Phoenix,
  • Dallas,
  • San Antonio,
  • Houston,
  • Chicago,
  • Philadelphia,
  • New York

[encarta map|http://encarta.msn.com/encnet/features/mapcenter/Map.aspx?name=United+States]

However, big cities usually covers more than one county, but the sub urban area is not counted in the city’s population. Whilst in China, lots sub urban agriculural population is also counted in.

In 2000, 49 cities in USA have more than 1 million population<br>
[Citation|http://www.demographia.com/db-usmet2000.htm]<br>

read more

泰坦尼克上的存活率

【原文写于2007-01-29,2012-01-02扩展】

多年前看电影《泰坦尼克号》时,有一个镜头是小两口跑过底舱,很多工人在里面烧锅炉,操作机器。我当时就想,这些工人最后有几个人能活下来?

搜了一下资料,还真有详细的分仓存活率统计:

The Titanic Passenger and Crew Statistics
出处:http://www.historyonthenet.com/Titanic/passengers.htm

 1st Class On Board 1st Class Survived 2nd Class On Board 2nd Class Survived 3rd Class On Board 3rd Class Survived Crew On Board Crew Survived
 Men175571681446275192
 Women14414093801657623
 Children6524247927
 Total325202285118706178913215
 Total Passengers = 1316 Total Crew = 913
 Total Survived = 498 Total Survived = 215
 Total On Board Titanic = 2229
 Total Survivors = 713

1等舱存活率:62%

2等舱存活率:41%

3等舱存活率:25%

船员存活率:24% (里面底舱工人有多少就不知道了)

read more

LinkedIn数据小结

今天发现我的LinkedIn联系人达到了不多不少正好500人。

当然,联系人不是越多越好。一般来说,不管有几百或者几千个联系人,其中真正靠谱的“熟人”,不会超过150个——这个据说是由人的部落生活时代形成的认知能力和社会性决定的。

下面这些数据,并没有任何实际的意义,只是保留下来和以后做比较。

1阶到3阶联系人数

Your Connections
Your trusted friends and colleagues
500
Two degrees away
Friends of friends; each connected to one of your connections
74,000+
Three degrees away
Reach these users through a friend and one of their friends
4,413,200+
Total users you can contact through an Introduction4,487,800+

关系网(含间接联系人)按地区分布

Your connections are in 114 locations

read more