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177 results about "Collaborative software" patented technology

Collaborative software or groupware is application software designed to help people working on a common task to attain their goals. One of the earliest definitions of collaborative software is "intentional group processes plus software to support them".

Collaborative interaction method for unmanned plane cluster and visual navigation system of unmanned plane

The invention discloses a collaborative interaction method for an unmanned plane cluster and a visual navigation system of an unmanned plane. The collaborative interaction method for the unmanned plane cluster comprises the following steps of: determining unmanned planes satisfying a collaborative condition in a communication coverage area of a certain unmanned plane by the unmanned plane in the unmanned plane cluster, and establishing an unmanned plane collaboration group according to the unmanned planes satisfying the collaborative condition; determining inter-plane routes of multiple unmanned planes in the unmanned plane collaboration group; allocating collaborative tasks to multiple unmanned planes in the unmanned plane collaboration group according to link state information of the inter-plane routes; and evaluating the link state according to the motion state of multiple unmanned planes in the unmanned plane collaboration group, and updating unmanned planes in the unmanned plane collaboration group and the collaborative task of each unmanned plane according to an evaluation result. The collaborative interaction method for the unmanned plane cluster is good in real-time, strong in reliability and high in communication quality, and can better adapt to an unmanned plane cluster communication environment during visual navigation.
Owner:TSINGHUA UNIV

Instantaneous impact point based unmanned aerial vehicle non-collaborative real-time obstacle avoidance method

The invention discloses an instantaneous impact point based unmanned aerial vehicle non-collaborative real-time obstacle avoidance method. The instantaneous impact point based unmanned aerial vehicle non-collaborative real-time obstacle avoidance method comprises the steps of 1 performing obstacle detection, namely obtaining a relative motion state of an obstacle, 2 performing obstacle motion estimation, namely obtaining machine state information based on satellite navigation information and calculating a motion state of an inertial space obstacle, 3 performing impact conflict detection, namely judging whether obstacle impact occurs or not, 4 performing obstacle avoidance decision making, namely making an obstacle avoidance decision based on a detection result in the step 3, 5 performing obstacle avoidance route re-planning based on a quick expanding random tree algorithm considering an instantaneous impact point, namely introducing route evaluation heuristic information based on the instantaneous impact point and achieving obstacle avoidance route re-planning. The instantaneous impact point based unmanned aerial vehicle non-collaborative real-time obstacle avoidance method has the advantages of being simple in principle, easy to achieve, capable of improving unmanned aerial vehicle safety and the like.
Owner:NAT UNIV OF DEFENSE TECH

Secure two-party collaboration SM2 signature method

The invention provides a secure two-party collaboration SM2 signature method consisting of steps of system initialization, negotiation generation of a signature public key, collaborative signature andoutput of a complete signature. According to the secure two-party collaboration SM2 signature method provided by the invention, prior to the negotiation of the signature public key and the collaborative signature, the both communication parties authenticate the identity of the opposite party by using the zero knowledge proof technology, the correctness of outputting the complete signature is ensured by using the promise technology, it is ensured that the first communication party does not need to decrypt a received ciphertext by using the homomorphic encryption technology, the operation of the corresponding ciphertext can be realized, and a timestamp mechanism is added to ensure that the both communication parties can output the complete signature only when the identity of the first communication party, the current time and the position information of the first communication party are consistent, so that the security of the system is greatly improved, the loss caused by the leakage ofa signature private key is reduced, and the man-in-the-middle attack can be prevented. The secure two-party collaboration SM2 signature method provided by the invention has higher security and can beused in an environment in which a communication channel is not safe.
Owner:SHAANXI NORMAL UNIV +1
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