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The intelligent motion control technology of Autonomous Underwater Vehicle (AUV) is the basis of long-distance voyage for AUV. The motion control capability in vertical plane is an important technical for AUV to complete multifarious missions. So, it is important and realistic significance to research on motion control in vertical plane of AUV. Motion control problem of AUV in vertical plane, especially...
In this paper we investigate the potential-based finite element algorithms for eddy-current problems. In our models the source coil carries a pulse excitation current generating a transient field. As distinguished from the traditional coupled algorithm whose discrete equation system including both vector and scalar potential unknowns is solved at every time-step, a novel decoupled algorithm is presented...
Routing overlay offers an ideal methodology to improve the end-to-end communicating performance by providing a backup path for any pair of nodes. The current solutions, however, suffer from the simultaneous failures between the default and the selected backup paths. This paper focuses on a crucial issue of selecting a proper backup path to detour around the failures on the default path with high probability...
The purpose of a multi-hop relay in WiMAX system is to enhance cell coverage, throughput and system capacity. IEEE802.16j standard specifies a multi-hop relay and IEEE802.16m standard recently considers adopting a multi-hop relay. Besides, many research groups insist that cooperative communication including transparent relay saves energy as well as brings better performance. However, they don't provide...
This paper presents an approach to design type- 2 fuzzy logic controllers (FLCs) for dynamic positioning (DP) systems, and the design process can be easily extended to other multi-input multi-output (MIMO) systems with coupling between loops. The combination of FLCs and nonlinear observers removes the need to linearize the kinematic equations of motion when designing control systems for the DP systems...
The transition to market economy in China has already been about 30 years. Regional disparities of China are becoming more serious. The inequality has become a drawback to Chinese economy. What matter and how can we resolve it? The paper argues that the game behavior between local government and local enterprise lead to the local institutional performance and it is the key of local economy development...
In a cellular network system one way to increase its capacity is to allow direct communication between closely located user devices when they are communicating with each other instead of conveying data from one device to the other via the radio and core network. The problem is then when the network shall assign direct communication mode and when not. In previous works the decision has been done individually...
We study how direct communication within a group of devices, cluster, can improve the performance of a conventional cellular system. The clusters are formed from devices that are close and communicating with each other, for example, sharing data. The clusters share the radio resources among other devices in the system thus creating a mixed network system comprising directly communicating devices and...
This paper used the Revised Universal Soil Loss Equation (RUSLE) to investigate the spatial distribution of annual soil loss in the upper basin of Miyun reservoir in China. Among the soil erosion factors, the vegetative cover or C factor has been one of the most difficult to estimate over broad geographic areas. In this paper, the C factor was estimated based on a multivariate regression analysis,...
A communication model of distributed embedded system was presented though introducing a multiple buses example. The paper analyzes the communication delay under interaction of computation and communication, allocating inter-processor communication links, and schedule communication. The complex system can be divided into several parts and then the algorithm is applied to all the parts respectively...
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