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Based on analysis of existing UTC parameters generating method, a new method for generating UTC parameters is proposed. Only changing the way of generating UTC parameters, the timing precision is improved from the level of tens of nanoseconds to nanoseconds when using the proposed method. And the positioning accuracy is also improved. In the paper, influence of the proposed method on BDS positioning...
When analyzing magnetic field distribution of the permanent magnets during the magnetizing process, it is important to couple the system equations of analysis method to the equation for the electric circuit. In this paper, the equations to calculate the residual flux distribution of permanent magnets using the $T\text{-}\Omega$ method taking into account the magnetizing process that uses the discharge...
The concept of Cognitive Network has been proposed and studied, because of the the development of the network technology. Cognitive networks can perceive the external environment; intelligently and automatically change its behavior to adapt the environment. This feature is more suitable to provide security for users with Quality of Service. This paper proposes a hybrid traffic prediction model, which...
Groundwater flow simulation has become one of the top international issues in new generation of environmental applications. When managing large-scale groundwater flow problems, the intensive computational ability and large amounts of memory space required for modeling are the main bottlenecks for researchers. In order to solve three-dimensional large-scale groundwater flow problems more rapidly, the...
Heat equation has been widely used in engineering, such as numerical simulation of groundwater flow. The parallelization of heat equation is an important means of accelerating the simulation process. In order to solve the three-dimensional heat equation problem more rapidly, the OpenMP was adopted to parallelize the preconditioned conjugate gradient (PCG) algorithm in this paper. A numerical experiment...
Kriging is one of the important interpolation methods in geostatistics, which has been widely applied in engineering project. In this paper, we present an efficient method for the parallelization of universal Kriging interpolation on shared memory multiprocessors. By using OpenMP directives, we implement a portable parallel algorithm, which enables an incremental approach to add parallelism, without...
Location models play an important role in location- based services (LBSs), because LBSs require a well-defined representation of location knowledge to support location browsing, navigation and query processing. Current location models can be divided into two categories: symbolic and geometric. Symbolic models try to represent the semantic relationships between entities, and geometric models are based...
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