Whether striding ahead with pride or slouching (没精打采地站) gloomily, we all broadcast our emotions through body language. Now a computer has learned to interpret those unspoken cues as well as you or I. Antonio Camurri of the University of Genoa in Italy and colleagues have built a system which uses the depth-sensing, motion-capture camera in Microsoft’s Kinect (体感游戏机) to determine the emotion conveyed by a person’s body movements. Using computers to capture emotions has been done before, but typically focuses on facial analysis or voice recording. Reading someone’s emotional state from the way they walk across a room or their posture as they sit at a desk means they don’t have to speak or look into a camera. "It’s a nice achievement," says Frank Pollick, professor of psychology at the University of Glasgow, UK. "Being able to use the Kinect for this is really useful." The system uses the Kinect camera to build a stick figure representation of a person that includes information on how his head, torso (躯干), hands and shoulders are moving. Software looks for body positions and movements widely recognized in psychology as indicative of certain emotional states. For example, if a person’s head is bowed and their shoulders are drooping (下垂), that might indicate sadness or fear. Adding in the speed of movement—slow indicates sadness, while fast indicates fear—allows the software to determine how someone is feeling. In tests, the system correctly identified emotions in the stick figures 61.3% of the time, compared with a 61.9% success rate for 60 human volunteers. Camurri is using the system to build games that teach children with autism (自闭症) to recognize and express emotions through full-body movements. Understanding how another person feels can be difficult for people with autism, and recognizing fear is more difficult than happiness. "In one of the serious games we developed, a child is invited to look at a short video of an actor expressing an emotion," Camurri says. "Then the child is invited to guess which emotion was expressed in the video." He adds that you can also ask the child to express the same emotion just by moving her body; joy, for example, can be characterized by energetic, fluid movements and a tendency to raise your arms. The team also plans to use the system to figure out how "in tune" a group of people is with their leader, looking for signals like how people’s heads move when someone is speaking. Pollick says it could be useful as an automatic way to classify emotion—as part of a CCTV (闭路电视) system to infer intent, or to help shops understand customers. What body movements would the system probably interpret as sadness
A. Bowed head and drooping shoulders.
B. Energetic movements and a tendency to raise arms.
C. Bowed head and fast movements.
Drooping shoulders and slow movements.
某甲自有房屋1间,1995年5月1日与乙签订了一份为期3年的房屋租赁合同,由乙承租该房。同年8月6日丙向甲提出愿意购买该房屋,甲即将要出卖该房屋的情况告知了乙。到了11月7日乙没有任何答复,甲与丙协商以5万元的价格将该房卖给丙,双方签订了房屋买卖合同,丙支付了全部房款。但在双方准备办理房产变更登记前数日,甲遇丁,丁愿以6万元买下该房。甲遂与丁又签订了一份房屋买卖合同,且双方第二天即到房屋管理部门办理了变更登记。不久,丁向银行贷款,以该房设定抵押。回答以下问题: 就房屋租赁关系而言,下列表述中哪些是正确的()
A. 该房为私房,甲有权自由出租,毋须向房屋管理部门登记备案
B. 房屋租金由甲乙自愿协商确定,法律并无最高数额限制
C. 甲将房屋卖给他人后,若新房主不愿继续出租,则其有权要求终止租赁合同
D. 甲乙均为自然人,故该租赁合同可以采取书面形式,也可采取口头形式