欢迎访问“祁青社”：http://i.geoidea.org/

发表于 2011-05-21 由 Hawkman | 留下评论

山野乐趣

发表于 2012-05-20 由 Hawkman

这个时候的麦子绿油油，满野的菜籽花

 

 

 

 

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西双版纳

发表于 2012-05-05 由 Hawkman

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景真八角亭

发表于 2012-05-05 由 Hawkman

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20120505-130914.jpg八角亭

20120505-130933.jpg菩提树

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维基百科观察（14）：移动浏览量超20亿

发表于 2012-05-04 由 Hawkman

维基媒体官方博客宣布，维基百科移动页面的浏览量超20亿，详情：http://blog.wikimedia.org/2012/05/03/mobile-milestone-two-billion-page-views/

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MIT and Harvard announced edX

发表于 2012-05-03 由 Hawkman

EdX is a joint partnership between The Massachusetts Institute of Technology (MIT) and Harvard University to offer online learning to millions of people around the world. EdX will offer Harvard and MIT classes online for free. Through this partnership, the institutions aim to extend their collective reach to build a global community of online learners and to improve education for everyone.

MIT’s Director of the Computer Science and Artificial Intelligence Laboratory Anant Agarwal serves as the first president of edX, and Harvard’s Faculty of Arts and Sciences Dean Michael D. Smith leads faculty in developing courses. Along with offering online courses, the institutions will use edX to research how students learn and how technology can facilitate teaching—both on-campus and online.

EdX is based on MITx, a technological platform from MIT designed to offer online versions of their courses. These versions include: video lessons, embedded testing, real-time feedback, student-ranked questions and answers, collaborative web-based laboratories, and student paced learning. Though this will never replace the traditional residential model of undergraduate education, it will serve to improve and supplement the teaching and learning experienced at both universities. In turn, Harvard and MIT have created edX open-source software and invite interested institutions to join edX with their own educational content.

EdX is a Cambridge-based not-for-profit, equally owned and funded by Harvard and MIT. The first set of courses will be announced in the summer and will begin in the Fall 2012.

More: http://www.edxonline.org

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澜沧

发表于 2012-04-30 由 Hawkman

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希腊活断层数据库

发表于 2012-04-22 由 Hawkman

The Greek Database of Seismogenic Sources: seismotectonic implications for North Greece

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CALIB

发表于 2012-03-21 由 Hawkman

CALIB makes the conversion from radiocarbon age to calibrated calendar years by calculating the probability distribution of the sample’s true age. Graphics and a variety of options are available through the program’s menus. The program can be cited by the published description of a previous revision (Stuiver and Reimer, 1993) or the on-line version (Stuiver et al., 2005). References to the calibration dataset used should be cited as found in the program output.

official site：http://calib.qub.ac.uk/calib/

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Download YouTube Video with browser extenstion

发表于 2012-03-21 由 Hawkman

YouTbue Downloader is a browser extension, which is suitable for Chrome and Firefox. You can download any YouTube video as an MP3 audio file, a high-definition MP4 video file, or an FLV with it. It is very easy to use. Enjoy it.

 

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编写MatLab代码的10种习惯

发表于 2012-03-19 由 Hawkman

Loren Shure分享了她编写代码的习惯，大家可以参考

  1. Vectorize (but sensibly).
  2. Use bsxfun in lieu of repmat where possible.
  3. When looping through an array, loop down columns to access memory in the same order that MATLAB stores the data in.
  4. Profile the code. I am often surprised about what is taking up the time.
  5. Pay attention to messages from the Code Analyzer.
  6. Use functions instead of scripts.
  7. Don’t “poof” variables into any workspaces. Translation, don’t use load without a left-hand side; avoid eval, evalin, and assignin.
  8. Use logical indexing instead of find.
  9. Avoid global variables.
  10. Don’t use equality checks with floating point values.

Loren Shure是MathWorks的雇员，参与设计MatLab

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