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【PTE】下周高频题目预测RL篇

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发表于 2018/1/16 15:41:11 | 显示全部楼层 |阅读模式

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Infinite Monkey Theory (猴子打字理论)

The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type a given text, such as the complete works of William Shakespeare. In this context, “almost surely” is a mathematical term with a precise meaning, and the “monkey” is not an actual monkey, but a metaphor for an abstract device that produces a random sequence of letters ad infinitum. The theorem illustrates the perils of reasoning about infinity by imagining a vast but finite number, and vice versa. The probability of a monkey exactly typing a complete work such as Shakespeare's Hamlet is so tiny that the chance of it occurring during a period of time of the order of the age of the universe is minuscule, but not zero.

But technologies can help monkeys to write. If the monkeys are given a pen and some papers to spell the word monkey, they can only scratch on the paper. By contrast, if they are given a typewriter, it will take them over 10 years to produce the right spelling. However, if they can use computer programing, they can finish the task within a day.

In this lecture the speaker talks about infinite monkey theorem.

According to the speaker she mentions that on a keyboard, a monkey will almost surely type a given text such as the complete works of William Shakespeare.

She indicates that it is a metaphor for an abstract device that produces a random sequence.

She suggests that if they are given a pen and some papers they can only scratch on the paper.

This lecture talks about infinite monkey theorem and the benefits of technology.

Australian Export (澳大利亚出口业)

暂无文本内容,大神们快来完善。

讲澳洲对日本、美国、中国近几十年来的出口业务,以及澳大利亚应该怎么趁亚洲这个好势头促进自己的出口业, 日本中国美英对澳出口的变化从1985到现在。

The lecture talks about China, japan, US's export business.

In the past, Australia was concerned about its geographical location, which may result in Australia being isolated from North America, UK, and later America.

Nevertheless, nowadays with the rise of Asian countries, especially China, Australia has become a great export country with a perfect location.

Currently, Japan is the largest exporting country to Australia, but China may become the largest one in the future. Australia should take the advantage of China's raise to develop its exports.

Mega City(巨大城市的影响)

The lecture is about mega cities' impact.

Global population has increased by 4 folds, from 1.5 billion in 1900 to 6 billion in 2000.

While resource consumption has increased more significantly by 16 folds over the century.

Due to urbanization, cities, which only account for 2% of the land, have 50% of the total population and consume 75% of the resources.

People not only use every resource but also produce tons of wastes.

How to become a good professor.

图片是个老头穿着西装在讲话,口音比较重但还是听得清,大致讲述他对teaching意义的看法,students are motivated by the needs to learn that's how we can teach. Teaching can demonstrate current research to the students. Teaching can bring intelligence together; find problems of research in the teaching process. Teaching is stimulated and motivated. Teaching is to find new idea, new way to do things. 最后定义了how to become a good professor.

The Large Hadron Collider

图上面有数据。 7ev - 7ev. Release energy 14,000 collision

只需把图片内容读出即可, 最后需要加,能够更好了解宇宙的未来,大致这个意思。

开始提到了这个东西是一个27km 的tunnel,中间提到了检测protons灯。7tev 的意思是7000 time larger than , 忘记了了。最后提到稳定是1.9 degree可以达到absolute zero

巴甫洛夫(Pavlov)实验

一个图上面分三个步骤, 和一条狗, 讲的是巴甫洛夫(Pavlov)实验, 关于狗的一个实 验, 图上有大 title, 有狗, 狗的饭盆, 貌似还有铃铛, 给狗狗喂食 条件反射, how motivation works, 响铃铛喂食, 然后以后一响铃唾液就会增加, Classical conditioning.

This lecture talks about the Pavlov experiment.

According to the speaker, he has mentioned some points of view.

There are 3 steps in the experiment.

Firstly, the unconditioned response means the dog salivates in response to seeing food.

Secondly, the conditioning means every time the dog sees the food, just ring the bell.

Finally, the conditioned response means although there is no food, you just ring the bell and the dog will salivate.

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