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更新时间:2018-4-6 19:52:29 来源:纽约时报中文网 作者:佚名

Why a robot won't steal your job yet

Madaline was the first.


Back in 1959 she used her impressive intellect to solve a previously intractable problem: echoes on telephone lines. At the time, long-distance calls were often ruined by the sound of the caller’s own voice bouncing back at them every time they spoke.


She fixed the issue by recognising when an incoming signal was the same as the one going out, and electronically deleting it. The solution was so elegant, it’s still used today. Of course, she wasn’t human – she was a system of Multiple ADAptive LINear Elements, or Madaline for short. This was the first time artificial intelligence was used in the workplace.

玛德林能够识别输入与输出的的相同信号,然后用电子的方式删除回声,解决了这个问题,这一简洁的解决方案沿用至今。当然,玛德林不是人类,而是一个多元自适应线性神经元(Multiple ADAptive LINear Elements)系统,简称“Madaline”。这是人工智能首次应用于工作领域。

Today it’s widely accepted that brainy computers are coming for our jobs. They’ll have finished your entire weekly workload before you’ve had your morning toast – and they don’t need coffee breaks, pension funds, or even sleep. Although many jobs will be automated in the future, in the short term at least, this new breed of super-machines is more likely to be working alongside us.


Despite incredible feats in a variety of professions, including the ability to stop fraud before it happens and spot cancer more reliably than doctors, even the most advanced AI machines around today don’t have anything approaching general intelligence.


According to a 2017 McKinsey report, with current technology just 5% of jobs could eventually be fully automated, but 60% of occupations could see roughly a third of their tasks taken over by robots.


And it is important to remember that not all robots use artificial intelligence – some do, many don’t. The problem is, the very same deficiency preventing these smart robots using AI from taking over the world will also make them extremely frustrating colleagues. From a tendency towards racism to a total inability to set their own goals, solve problems, or apply common sense, this new generation of workers lack skills that even the most bone-headed humans would find easy.


So, before we gambol off into the sunset together, here’s what you will need to know about working with your new robot colleagues.


Rule one: Robots don’t think like humans


Around the time Madaline was revolutionising long-distance phone calls, the Hungarian-British philosopher Michael Polanyi was thinking hard about human intelligence. Polanyi realised that while some skills, such as using accurate grammar, can be easily broken down into rules and explained to others, many cannot.

大约与玛德林革新长途电话的同时,英籍匈牙利哲学家波兰尼(Michael Polanyi)在苦苦思索人类智力的问题。波兰尼意识到,人类的有些技能,例如使用准确的语法,可以轻易地归纳成规则并向他人解释,有些则不能。

Humans can perform these so-called tacit abilities without ever being aware of how. In Polanyi’s words, “we know more than we can tell”. This can include practical abilities such as riding a bike and kneading dough, as well as higher-level tasks. And alas, if we don’t know the rules, we can’t teach them to a computer. This is the Polanyi paradox.


Instead of trying to reverse-engineer human intelligence, computer scientists worked their way around this problem by developing AI to think in an entirely different way – thoughts driven by data instead.


“You might have thought that the way AI would work is that we would understand humans and then build AI exactly the same way,” says Rich Caruana, a Senior Researcher at Microsoft Research. “But it hasn't worked that way.” He gives the example of planes, which were invented long before we had a detailed understanding of flight in birds and therefore have different aerodynamics. And yet, today we have planes that can go higher and faster than any animal.

微软研究院(Microsoft Research)高级研究员卡鲁阿纳(Rich Caruana)说:"你可能以为人工智能的原理是我们先了解人类,然后以同样的方式构建人工智能,但事实并非如此。"他以飞机为例,我们早在详细了解鸟类飞行原理之前就造出了飞机,使用的空气动力学原理不一样,但今天我们的飞机比任何动物都飞得更高更快。

Like Madaline, many AI agents are “neural networks”, which means they use mathematical models to learn by analysing vast quantities of data. For example, Facebook trained its facial recognition software, DeepFace, on a set of some four million photos. By looking for patterns in images labelled as the same person, it eventually learned to match faces correctly around 97% of the time.


AI agents such as DeepFace are the rising stars of Silicon Valley, and they are already beating their creators at driving cars, voice recognition, translating text from one language to another and, of course, tagging photos. In the future they’re expected to infiltrate numerous fields, from healthcare to finance.


Rule two: Your new robot friends are not infallible. They make mistakes


But this data-driven approach means they can make spectacular blunders, such as that time a neural network concluded a 3D printed turtle was, in fact, a rifle. The programs can’t think conceptually, along the lines of “it has scales and a shell, so it could be a turtle”. Instead, they think in terms of patterns – in this case, visual patterns in pixels. Consequently, altering a single pixel in an image can tip the scales from a sensible answer to one that’s memorably weird.

然而这种依靠数据的思维方法也可能会犯下大错,例如某人工神经网络曾经把3D打印的乌龟认成了步枪。因为这个程序无法进行概念推理 ,不会想到"这个东西有鳞和壳所以可能是只乌龟"。相反,它们是根据模式思考——这个例子中是以像素为单位的视觉模式。因此,改变图像中的某个像素,一个合理答案就可能演变成无稽之谈。

It also means they don’t have any common sense, which is crucial in the workplace and requires taking existing knowledge and applying it to new situations.


A classic example is DeepMind AI; back in 2015 it was told to play the classic arcade game Pong until it got good. As you’d expect, it was only a matter of hours before it was beating human players and even pioneering entirely new ways to win. But to master the near-identical game Breakout, the AI had to start from scratch.


Although developing transfer learning has become a large area of research, for instance a single system called IMPALA shows positive knowledge transfer between 30 environments.


Rule three: Robots can’t explain why they’ve made a decision


The second problem with AI is a modern Polanyi paradox. Because we don’t fully understand how our own brains learn, we made AI to think like statisticians instead. The irony is, that now we have very little idea of what goes on inside AI minds either. So, there are two sets of unknowns.


It’s usually called the ‘black box problem’, because though you know what data you fed in, and you see the results that come out, you don’t know how the box in front of you came to that conclusion. “So now we have two different kinds of intelligence that we don't really understand,” says Caruana.


Neural networks don’t have language skills, so they can’t explain to you what they’re doing or why. And like all AI, they don’t have any common sense.


A few decades ago, Caruana applied a neural network to some medical data. It included things like symptoms and their outcomes, and the intention was to calculate each patient’s risk of dying on any given day, so that doctors could take preventative action. It seemed to work well, until one night a grad student at the University of Pittsburgh noticed something odd. He was crunching the same data with a simpler algorithm, so he could read its decision-making logic, line by line. One of these read along the lines of “asthma is good for you if you have pneumonia”.

几十年前,卡鲁阿纳将医疗数据输入人工神经网络,包括症状及其后果,从而计算在任何一天患者的死亡风险有多大,让医生能够采取预防措施。效果似乎不错,直到有天晚上一位匹兹堡大学(University of Pittsburgh)的研究生发现了问题。他用一个更简便的算法处理同一组数据,逐条研究神经网络做诊断的逻辑,其中一条诊断是"如果你患有肺炎,那么患哮喘对你是有好处的"。

“We asked the doctors and they said ‘oh that’s bad, you want to fix that’,” says Caruana. Asthma is a serious risk factor for developing pneumonia, since they both affect the lungs. They’ll never know for sure why the machine learnt this rule, but one theory is that when patients with a history of asthma begin to get pneumonia, they get to the doctor, fast. This may be artificially bumping up their survival rates.


With increasing interest in using AI for the public good, many industry experts are growing concerned. This year, new European Union regulations come into force that will give individuals the right to an explanation about the logic behind AI decisions. Meanwhile, the US military’s research arm, the Defense Advanced Research Projects Agency (Darpa) is investing $70 million into a new program for explainable AI.

随着人工智能越来越广泛地用于公益事业,许多业内专家也越来越担心。今年,新的欧盟法规生效,授权个人可以解释人工智能决策背后的逻辑。与此同时,美国军方的研究机构国防部高级研究计划局(Defense Advanced Research Projects Agency, Darpa)投入七千万美金,以研究可解释其行为的人工智能。

“Recently there’s been an order of magnitude improvement in how accurate these systems can be,” says David Gunning, who is managing the project at Darpa. “But the price we’re paying for that is these systems are so opaque and so complex, we don’t know why, you know, it’s recommending a certain item or why it’s making a move in a game.”

Darpa该项目负责人冈宁(David Gunning)说,"近来,系统的准确度有了质的提高,但问题是这些系统太隐晦、太复杂,我们不知道它为什么推荐某个东西,或是在游戏里做某个动作。"

Rule four: Robots may be biased


There’s growing concern that some algorithms may be concealing accidental biases, such as sexism or racism. For example, recently a software program tasked with advising if a convicted criminal is likely to reoffend was revealed to be twice as hard on black people.


It’s all down to how the algorithms are trained. If the data they’re fed is watertight, their decision is highly likely to be correct. But often there are human biases already embedded. One striking example is easily accessible on Google translate. As a research scientist pointed out in the magazine Medium last year, if you translate “He is a nurse. She is a doctor,” into Hungarian, and then back into English, the algorithm will spit out the opposite sentence “She’s a nurse. He is a doctor,”.


The algorithm has been trained on text from about a trillion webpages. But all it can do is find patterns, such as that doctors are more likely to be male and nurses are more likely to be female.


Another way bias can sneak in is through weighting. Just like people, our AI co-workers will analyse data by “weighting” it – basically just deciding which parameters are more or less important. An algorithm may decide that a person’s postcode is relevant to their credit score – something that is already happening in the US – thereby discriminating against people from ethnic minorities, who tend to live in poorer neighbourhoods.


And this isn’t just about racism and sexism. There will also be biases that we would never have expected. The Nobel-prize winning economist Daniel Kahneman, who has spent a lifetime studying the irrational biases of the human mind, explains the problem well in an interview with the Freakonomics blog from 2011. “By their very nature, heuristic shortcuts will produce biases, and that is true for both humans and artificial intelligence, but the heuristics of AI are not necessarily the human ones.”

不仅仅是种族歧视和性别歧视的问题,还会有我们从未想到过的歧视。诺贝尔奖得主经济学家卡内曼(Daniel Kahneman)穷其一生研究人类思维中的非理性偏见。他在2011年接受魔鬼经济学(Freakonomics)博客访问时,很好地解释了这个问题。他说:"本质上无论是人还是人工智能,经验法则都会造成偏见,但人工智能的经验法则未必与人的经验一样。"

The robots are coming, and they’re going to change the future of work forever. But until they’re a bit more human-like, they’re going to need us by their sides. And incredibly, it seems like our silicon colleagues are going to make us look good.