给 Apple Watch 加个人工智能外挂
（11:04:32 更新）MIT TR 的这篇报道介绍了如何给 Apple Watch 加一个人工智能外挂，由此带来的变化令人惊叹：
To do that, the researchers gathered data from 166 people who met several criteria: they wore an Apple Watch, were known to have atrial fibrillation, and also had an AliveCor device, an FDA-approved electrocardiogram (EKG) that hooks up to an iPhone (the company is also developing a watch band that can be worn with an Apple Watch, but that hasn’t yet received FDA approval).
Each of these users generated two streams of data simultaneously: one from the watch, and one from the EKG that was capable of accurately showing when someone’s heart was fibrillating. By training a machine-learning algorithm on the two streams, the team reasoned the algorithm could teach itself to identify what fibrillation looked like in the less precise Apple Watch data. A test on readings from about 50 people seemed to bear that out—the algorithm was 97 percent accurate in flagging fibrillation.