36 results about "Socially distributed cognition" patented technology

The invention discloses a multi-channel collaborative spectrum sensing method based on iterative filtering. The method includes: time is divided into time slices with fixed length through a reasonably designed frame structure. In each time slice, a secondary user with poor sensing performance is removed preferentially and does not participate in next round of cooperative spectrum sensing, and therefore the number of sensing users is reduced remarkably, and spectrum sensing performance is improved. Through design of the frame structure and a collaborative sensing scheme, the multi-channel collaborative spectrum sensing method based on the iterative filtering can solve problems of too much collaborative spectrum sensing users and malicious user interference existing in a distributed cognitive radio network. Theory analysis and simulation results show that: compared with an existing collaborative spectrum sensing method, the multi-channel collaborative spectrum sensing method based on the iterative filtering can effectively reduce the number of the secondary users participating in collaborative sensing in a loose condition, malicious interference users are removed, and simultaneously spectrum sensing performance of the cognitive radio network is improved.

The invention provides distributed cognitive technology for an intelligent emotional robot, which can be applied in the field of multi-channel human-computer interaction in service robots, household robots, and the like. In a human-computer interaction process, the multi-channel cognition for the environment and people is distributed so that the interaction is more harmonious and natural. The distributed cognitive technology comprises four parts, namely 1) a language comprehension module which endows a robot with an ability of understanding human language after the steps of word division, word gender labeling, key word acquisition, and the like; 2) a vision comprehension module which comprises related vision functions such as face detection, feature extraction, feature identification, human behavior comprehension, and the like; 3) an emotion cognition module which extracts related information in language, expression and touch, analyzes user emotion contained in the information, synthesizes a comparatively accurate emotion state, and makes the intelligent emotional robot cognize the current emotion of a user; and 4) a physical quantity cognition module which makes the robot understand the environment and self state as the basis of self adjustment.

The invention discloses a distributed cognition wireless network spectrum allocation method based on coalition games. The problem that in the prior art, a cognition wireless network cannot fully use a totalization and whole and partial concept to allocate free frequency ranges is mainly solved. The method comprise the steps of detecting free frequency ranges, computing secondary user utility values, establishing stable coalition, selecting a coalition manager, merging data, refreshing secondary user trust values, allocating the free frequency ranges and refreshing the secondary user trust values. The method is fully combined with the advantages of the cognition wireless network, the trust values, participation values and requirement values are used to represent the utility values of a secondary user comprehensively, the secondary user satisfaction degree of the free frequency ranges and network service quality are improved, the secondary user is divided into the coalition to allocate spectrum resources, using ratio of the free frequency ranges and fairness of spectrum allocating are improved, and by refreshing the secondary user trust values, negative influence on a network from a vicious secondary user is lowered.

The invention provides a cognitive radio power control method and system based on adaptive bacterial foraging. The method includes the steps of establishing a multiuser underlying distributed cognitive radio network system, and setting initial values of parameters of the cognitive radio network system and initial values of parameters of an adaptive bacterial foraging algorithm; and then determining whether the transmitting power of current cognitive users meets preset constraints, and controlling the power of the cognitive users using the adaptive bacterial foraging algorithm to obtain the minimum value of the sum of the transmitting power of the cognitive users. According to the invention, the communication quality of the authorized users can be guaranteed, an adverse effect of the transmitting power of the cognitive users on a cognitive device is avoided, the cognitive users are allowed to have less energy consumption, the run time of the network is extended, and a better cognitive network spectrum utilization rate is thus gained.