GRE ISSUE 121

TOPIC: ISSUE121 – “At various times in the geological past, many species have become extinct as a result of natural, rather than human, processes. Thus, there is no justification for society to make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species.”
WORDS: 572? ?? ?? ? TIME: 00:45:00? ?? ?? ? DATE: 2007-9-6 18:11:18

“The Sixth Great Extinction is?[......]

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GRE ARGUMENT 199

TOPIC: ARGUMENT199 - There is a general idea that waiters and waitresses are more likely to receive larger gratuities from large groups of people. A recent research study suggests this is not true. The researchers examined the relationship between the size of tips in restaurants and the number of meals charged on the bill. They found that, while most tips were around 15 percent, the minimum percen[......]

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GRE ISSUE 69

TOPIC: ISSUE69 - “Government should place few, if any, restrictions on scientific research and development”
WORDS: 587? ?? ?? ? TIME: 00:45:00? ?? ?? ? DATE: 2007-9-5 18:23:28

What is the role of government on scientific research and development? Some people may think of the work of society, of course including scientific research, should be put under the direction of government policy or regu[......]

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GRE ARGUMENT 51

TOPIC: ARGUMENT51 – The following appeared in a medical newsletter.?

“Doctors have long suspected that secondary infections may keep some patients from healing quickly after severe muscle strain. This hypothesis has now been proved by preliminary results of a study of two groups of patients. The first group of patients, all being treated for muscle injuries by Dr. Newland, a doctor who speciali[......]

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Classification之Decision Tree Gini Index 完整示例

整理历史邮件的时候pick up出了研一时候的一个基于gini index的classification的作业,包括一个7页纸的功能介绍。作业很精致,文章也挺精致的。能回忆起来,当时白天在教研室做项目,这个小作业是一个半晚上做完的,只记得当时代码写的飞快,键盘敲的很爽。最后根据training data,使用Swing 的JTree画出的Decision Tree很漂亮,最后使用testing data做验证,准确率也很不错。

当时怎么这么爱写E文的,因为当时完全在E文的环境下,上课、作业、项目。唉,现在看着没有那么顺手了,感叹context的影响真是潜移默化,但却足够深远!

代码能跑起来,跑起来效果也挺好,工具很好用,做的也很周到。traning出来的decision tree长得挺好看的,最后还有个基于testing data的对于构造的decision tree的评估。但[......]

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