人机接口介绍(Brain-computer interface)
人机接口（BCI），通常被称为思想机器接口（MMI），或有时直接称为神经接口或脑机接口（BMI），人机接口常常用来协助，修复人类认知或感觉运动功能。
brain–computer interface (BCI), often called a mind-machine interface (MMI), or sometimes called a direct neural interface or a brain–machine interface (BMI),
is a direct communication pathway between the brain and an external device.
BCIs are often directed at assisting, augmenting, or repairing human cognitive or sensory-motor functions.
下面这幅图说明了整个的控制流程（
参考： http://en.wikipedia.org/wiki/Brain%E2%80%93computer_interface
http://edition.cnn.com/2012/10/17/health/brain-computer-interfaces/
（Brain-controlled devices may help paralyzed people）
