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Since the pulsar is far away from the earth and the signal is weak, it is hard to detect the radiated photons of the pulsar on the ground. Thus the most effective and feasible method of signal generation is to use mathematical model to simulate it. In this paper, a signal simulated method for X-ray pulsar based on Monte Carlo is proposed, which improves the method of probability statistics and overcomes...
An optimized conformal finite-difference time-domain (FDTD) (2, 4) method is proposed for calculating reflected, diffracted, and total fields of two- and three-dimensional (2- and 3-D) perfectly conducting (PEC) wedges with an electromagnetic pulse (EMP) incidence, where one low-cost coefficient-modification (CM) technique is implemented for effectively reducing its numerical dispersion error. For...
There is co-petition in the technology alliances. The correlation between competition awareness and innovation performance in the process of knowledge transfer within the alliance is studied in the paper. The empirical study collects data from 131 firms located in Liaoning Province area in China, and the hypothesis of the correlation are tested with Structural Equation Modeling. The result shows that...
CI-RXLEV-E is a cell identifier (CI) based method which could be applied for location based services (LBS). In our previous work, it has been proved as the most accurate method which utilizes the information of measurement report (MR) and cell configuration database (CCD) to locate UE. In this paper, we suggest an empirical criterion to estimate the position error size of calculation results for this...
In this paper we study on the alert analysis technique of Network Situation Awareness (NSA). The overwhelming alerts make it challenging to understand and manage. Although there are already many alert analysis techniques proposed in Intrusion Detection research area, most of them are used to reduce false positives and false negatives. However, the NSA requires the alert analysis techniques to offer...
The blast load response of precise bolt finite element model was studied by LS-DYNA software. Firstly, the initial stress of thread was added by the dropping temperature method. Then the dynamic response and deformation damage of the bolt model were calculated by the elastic-plastic constitutive material equation and surface-surface contact algorithm, which calculating models including bolt joint...
In IEEE 802.16e mobile WiMAX system, since mobile stations (MSs) send bandwidth request (BR) messages to base station (BS) during contention period when they need uplink channel to transmit data in the case of multicast polling or broadcast polling, the uplink performance is affected by the size of the contention period in the uplink subframe. The access delay will be increased if the size of the...
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