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Parallel finite difference beam propagation method based on message passing interface:application to MMI couplers with two-dimensional confinement

引用

Chinese Optics Letters 2007年第9期5卷 516-518页

作者：严朝军彭文标李海军 College of Electrical Engineering and Information Technology Three Gorges University

The alternate-direction implicit finite difference beam propagation method （FD-BPM） is used to analyze the two-dimensional （2D） symmetrical multimode interference （MMI） couplers. The positions of the images at the output plane and the length of multimode waveguide are accurately determined numerically. In order to reduce calculation time, the parallel processing of the arithmetic is implemented by the message passing interface and the simulation is accomplished by eight personal computers.

关键词： Calculations Computer simulation Integrated optics Light interference Message passing personal computers Two dimensional

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Experiment study of ATP system for free-space optical communications

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Optoelectronics Letters 2011年第6期7卷 451-453页

作者：肖永军刘彦飞董冉熊准 School of Physics and Electronic Information Engineering Xiaogan University College of Electronic Information Wuhan University

To meet the requirement of high tracking angular accuracy for the acquisition, tracking, and pointing (ATP) subsystem of the free-space optical communication, and provide the basis for the further optical communication between maritime mobile platforms, the experimental system, which executing part for the fine tracking is voice coil motor with high frequency and good performance for error compensation, is established, and the whole system can be controlled by personal computer. A series of experiments has been done for the simulation target of different uniform speed, and the data of tracking error for fine tracking and coarse tracking are collected, analyzed and evaluateds separately, and the real-time optical power of communication laser is also collected. The result shows that standard deviation for ATP system tracking error increases with the increase of target speed, while the range of tracking error appears to be no order. Furthermore, communication link can be hold for a long time.

关键词： Communication Error compensation Experiments Marine applications personal computers Space platforms Target tracking

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Experimental Investigation of the Effect of Size on the Mechanical Behavior of Shale

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Acta Geologica Sinica(English Edition) 2015年第A01期89卷 312-313页

作者： CHEN Jianjun LU Shuangfang LI Junqian XIE Liujuan ZHANG Pengfei ZHANG Ping Research Institute of Unconventional Petroleum and Renewable Energy China University of Petroleum Qingdao266580 Shandong China School of Geosciences China University of Petroleum Qingdao 266580 Shandong China

China is rich in shale oil resource, which referring to the petroleum accumulation occurred in pure shale （including mudstone and shale） reservoir, namely shale oil. It is expected to become an important alternative energy in the future （Zou et al., 2003）. However, the shale oil production is far from the standard of economic efficiency. So there is a need to carry out effective fracturing treatment in order to increase yield. The mechanical behavior of rocks have an important influence on the fracturing treatment of reservoir, such as crack initiation and propagation during fracturing treatment. Therefore, evaluating the mechanical behavior of shale is an important work.

关键词： OIL shales SHALE gas reservoirs personal computers MUDSTONE HYDRAULIC fracturing

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