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Recent advances in infrastructure-to-vehicle (I2V) and vehicle-to-vehicle (V2V) communications are envisioned to enable a variety of emerging applications in vehicular networks, where it is imperative to provide efficient data services via cooperative vehicular communications. In this work, we present the data dissemination system via cooperative I2V and V2V communications. We formulate the problem...
The auto-disturbance rejection control approach is used in this paper to solve the trajectory tracking control problem of three-joint mechanical manipulators. The three-joint manipulators is a system with nonlinear, uncertainty, strong coupling, and is a multivariable system that is closely related to the principle of kinematics and dynamics. In the adopted auto-disturbance rejection control technology...
The time scale is an important element of spatial-temporal data model thatdetermines the level of detail to characterize and describe the geographic information. In spatial-temporal databases, time granularity has a decisive impact on the topological spatial-temporal relationship of geographical objects. In this paper, at first a formal definition of basic elements of time has been put forward. Then...
In the current effect analysis of large-scale electromagnetic radiation, the following factors such as the terrain and surface features around the radiation source is not involved, which lead to the big error of field intensity distribution from the computational analysis and actual measure value after the equipments service. Aiming at the critical case, we firstly analyze the fundamental principle...
The performance of traditional TCP congestion control protocol degrades when congestion and contention increase in ad hoc networks that use the IEEE 802.11 DCF. Many of the problems result from medium contention at the media access control (MAC) layer. In this paper, we present a new contention-based congestion control (CBCC) method according to a novel congestion information from MAC layer. This...
In this paper, a collision-free on-demand multiple access (CF-ODMA) protocol for mobile ad hoc networks is proposed. In the CF-ODMA protocol, every node obtains collision-free polling service by channel reservation. In addition, a collision resolution algorithm is presented to guarantee that in the present of reservation collisions the access nodes can successfully access channel in sequence, and...
With the development of economy and society, the requirements for graduated students from universities become higher on both knowledge learning and synthetic application quality. In addition, the most important problem in higher education is quality training of undergraduate students, i.e. teaching them how to learn knowledge and most importantly how to conduct themselves and deal with affairs. As...
With the development of economy, the society focuses more and more concern on higher education. Some of the problems exposed on higher education have also been planed on discussion agenda. Among them, adaptation to university of college freshmen gradually becomes a concerned problem which needs to be resolved by parents and educators. In this paper, problems for college freshmen to adapt to university...
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