virtual是什么意思？

At first, the virtual assistant wasn't too great.

Professor Goel decided to do something to remedy this situation and his solution was to create a virtual assistant named Jill Watson, which is based on the IBM Watson platform.

Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else's accomplishment.

The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all the questions posed by students on the online forum.

The students, who were studying artificial intelligence, were interacting with the virtual assistant and couldn't tell it apart from a real human being.

The virtual assistant became so advanced and realistic that the students didn't know she was a computer.

It is still easy to be dazzled by the display of drones ( ' , 无人机 ), 3D printers, virtual reality goggles ( ' , 眼镜 ) and more smart devices than you could ever hope to catalog.

My colleagues and I are studying something called augmented reality (a field of computer research dealing with the combination of real-world and virtual reality)," said Christopher Dede, professor in learning technologies at Harvard University, "Alien Contact," for example, is an exercise developed for middle-school students who use hand-held devices that can determine their location.

These "thought experiments" were pages of calculations signed and submitted to the prestigious journal Annalen der Physik by a virtual unknown.

Clothes and other items that need to be tried on such as diamond rings and gold necklaces are generally not suited to virtual retailing, and, of course, items with a low value- to-weight ratio.

It is still easy to be dazzled by the display of drones, 3D printers, virtual reality goggles and more "smart" devices than you could ever hope to catalog.

Many successful virtual companies provide digital services, such as financial transactions, in the case of PayPal, or means of communication, as Skype does.

Products which are potentially embarrassing to buy also do well in the virtual environment.

They scanned the brains of teens and adults who were playing a virtual driving game designed to test whether players would brake at a yellow light or speed on through the crossroad.