listen and translation exercise 49

一项新研究发现,无论何种语言,“Huh?”都是人们在对话中未听清对方所说时最普遍使用的词汇。此外,气候变化导致的极端天气正在威胁着麦哲伦企鹅幼崽的生存。

 

Huh? Appears to Be Universally Understood
What's the most universal utterance in languages across the globe?

Huh? —Correct! —Huh? —That's right. —HUH? —Exactly.

Because a new study finds that everybody around the world does indeed say huh?

The finding is in the journal PLOS One.

The researchers were exploring linguistic tools people use to assure fluid communication.

In this case, they were looking for an interjection that signals that a listener missed something,

then prompts the speaker to repeat or rephrase the original statement.

In other words, something that works like the English word Huh?

So they eavesdropped on nearly 200 conversations in 10 different tongues, from Italian to Icelandic.

And they found that, in language after language, a word that sounds a lot like huh? gets the job done.

For example. Eh? Eh? Eh? It's short and sweet so it's likely to stop the speaker before the listener gets too lost.

And it sounds like a question so it warrants a response.

The sound appears not to be innate.

Babies don't use it before they say mama.

But most five-year-olds are masters of "huh?" No matter where they come from.

 


Global Warming Freezes Penguin Chicks

Life isn't easy for a penguin chick.

There's a lot to worry about: predators, having enough food, and now the changing climate.

Researchers spent nearly thirty years tracking chicks at Punta Tombo, the world's largest colony of Magellanic penguins.

They found that increased rainfall and extreme heat due to climate change are killing chicks.

The study is in the journal PLOS ONE.

Down-covered chicks are too big to receive parental protection from the elements,

but are not old enough to have grown protective waterproof feathers.

So they get soaked to the skin during rainstorms and die of hypothermia.

Their downy feathers do them a disservice during heat waves too,

since they can't go for a swim to cool off until their waterproof feathers grow in.

Chicks not getting enough food are even more susceptible to the elements, as they lack the fuel to maintain their body temperature.

Storms during breeding season are already on the rise, and are expected to keep increasing.

So climate change will likely pose a challenge not only in Magellanic penguins, but other seabirds as well.

It'll be sink or swim.

转载于:https://www.cnblogs.com/huangbaobaoi/p/8430049.html

先展示下效果 https://pan.quark.cn/s/a4b39357ea24 遗传算法 - 简书 遗传算法的理论是根据达尔文进化论而设计出来的算法: 人类是朝着好的方向(最优解)进化,进化过程中,会自动选择优良基因,淘汰劣等基因。 遗传算法(英语:genetic algorithm (GA) )是计算数学中用于解决最佳化的搜索算法,是进化算法的一种。 进化算法最初是借鉴了进化生物学中的一些现象而发展起来的,这些现象包括遗传、突变、自然选择、杂交等。 搜索算法的共同特征为: 首先组成一组候选解 依据某些适应性条件测算这些候选解的适应度 根据适应度保留某些候选解,放弃其他候选解 对保留的候选解进行某些操作,生成新的候选解 遗传算法流程 遗传算法的一般步骤 my_fitness函数 评估每条染色体所对应个体的适应度 升序排列适应度评估值,选出 前 parent_number 个 个体作为 待选 parent 种群(适应度函数的值越小越好) 从 待选 parent 种群 中随机选择 2 个个体作为父方和母方。 抽取父母双方的染色体,进行交叉,产生 2 个子代。 (交叉概率) 对子代(parent + 生成的 child)的染色体进行变异。 (变异概率) 重复3,4,5步骤,直到新种群(parentnumber + childnumber)的产生。 循环以上步骤直至找到满意的解。 名词解释 交叉概率:两个个体进行交配的概率。 例如,交配概率为0.8,则80%的“夫妻”会生育后代。 变异概率:所有的基因中发生变异的占总体的比例。 GA函数 适应度函数 适应度函数由解决的问题决定。 举一个平方和的例子。 简单的平方和问题 求函数的最小值,其中每个变量的取值区间都是 [-1, ...
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