UAV swarm has emerged as a crucial new combat force in information warfare. To tackle the challenges of collective shape control in UAV swarms driven by multiple tasks， a phase transition control method for UAV swarms inspired by birds’ behavior is proposed. Firstly， the behavioral patterns of bird flocks are analyzed， and the characteristics of collective defense behavior in bird flocks exemplified by sparrows are summarized. Then， a phase transition control model for UAV swarms based on four rules （four-rules phase transition model， FRPT） is built by introducing centripetal/centrifugal dual force and establishing “mutation” interaction rules. Next， with control parameters and order parameters defined and key control parameters regulated， the phase transition control of UAV swarm is achieved and the effectiveness of the proposed method is experimentally proved. Finally， through the optimal parameter solving of swarm intelligence optimization algorithms， the formation period of ordered phases is shortened by nearly 70%， which validates the optimization feasibility of the proposed method.The method is anticipated to be extensively applied in tasks such as reconnaissance and emergency rescue missions for UAV swarm perception.

Currently， the strategic competition among major powers is intensifying. Various operational concepts such as joint all domain concept （JADC）， mosaic warfare， and distributed defense， have brought new threats to the existing aerospace defense system. Against the background of strategic competition among major powers， the characteristics of modern aerospace defense systems are analyzed， such as completeness of operation elements， openness of architecture， antagonism of systems， and convergence of capabilities. The challenges of intelligent development in the aerospace defense system are studied， and the key points of intelligent development of aerospace defense systems are given. In addition， a development vision for an intelligent aerospace defense system featuring agile operation， robust antagonism， and efficient management and control is presented， which provides a new idea for the modernization construction of aerospace defense systems.

In order to solve the special complexity of architecture design of cross-domain operational systems， a design method of multi-dimensional architecture is proposed， including the design of conceptual architecture， physical architecture and logical architecture. The definitions and design procedures of the three above architectures are provided， with the conceptual architecture design including threat situation research， opposition research， capacity requirements analysis and operational concept generation， the physical architecture design including component elements selection， connection relationships description and deployment design， the logical architecture design including organizational hierarchy relationships design， operational process design， information sharing design and precision information transmission analysis. The proposed method can provide guidance for the architecture design of cross-domain operational systems.