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With the accelerating process of urbanization, rural migrant workers flood into the cities. Research projects that aim at resettlement and employment promotion of these workers, social stability, as well as economic development have drawn attention of government and scholars alike. With respect to the matching problems of urban employment of rural migrant workers, grey incidence analysis and two-sided...
This paper considers a kind of nonautonomous system of two species predator-prey system with double density restrict and stage-structure for prey. The sufficient conditions are obtained for guaranteeing the permanence of the system by Laypunov method. Then the existence and uniqueness of the positive almost periodic solutions for almost periodic systems are also discussed. Some new results obtained.
To achieve a succesful electromagnetic interference simulation and analysis among lots of electromagnetic equipment deployed in wide range, passing the time-varying spectrum simulation parameters to each simulation terminal quickly and in time is a critical factor. This paper proposes an electromagnetic propagation simulation platform, in which all the simulation terminals acquire part of the simulation...
The dynamics model of a Six-Wheeled Articulated lunar rover is researched in this paper. Refer to vehicle dynamics theory, the forces acting on the wheels are analyzed in terms of mechanical principles and configuration features on rough terrain. The nonlinear dynamics model is built up by the Kane method under ideal state. Based on the model, speed tracked control is simulated. The results illustrate...
Aims at the issue of passenger turnover structure, based on Markov theory building the multi-product alternative forecast model, obtained the future passenger turnover structure under the stable state trend of transportation development. In practice this method has the strong feasibility, through the prediction of the passenger turnover this thesis could provide a viable research ideas for the harmonious...
The relationship between informatization and economic development is very close. Informatization can promote rapid economic growth. Conversely, more economic development creates favorable conditions for the development of informatization. Over the past 10 years, Beijing's economy has shown a sustained and stable growth, which is related to the role of informatization and its support. In this paper,...
Emergency decision support system (EDSS) is a very useful method to improve the level of emergency management. How to build an open, comprehensive and flexible emergency decision support system to handle various public emergencies and integrate various models and methods, has become a focus in the theoretical study and practical applications. Firstly, the general decision process of emergency management...
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