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Xianyang, China

Wang J.,Northwest University, China | Wang J.,No203 Research Institute | Lai S.,Northwest University, China | Li W.,No203 Research Institute | And 2 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2015

The REE geochemistry of four groups of samples (the regional stratigraphy, ore-hosting rocks, altered rocks, and uranium ores) were analyzed by using ICP-MS method to investigate the genesis of the uranium bearing granite in Danfeng area, North Qinling. The different groups of samples show significant similarity in LREE-enriched REE patterns and negative Eu anomalies. This indicates that the ore-hosting rocks and regional strata were formed in a typical island arc tectonic environment. Besides, altered rocks and uranium ores inherited abundant REE geochemical characteristics from the ore-hosting rocks. The rocks and uranium ores with narrow range of Y/Ho ratios between 25.09-33.46 were derived from the same source. In addition, uranium ores are characterized by highest ∑HREE, and HREE contents correlate positively with uranium ores grades, which is regarded as a clue to a simultaneous transportation of HREE and U. © 2015, Jilin University Press. All right reserved. Source


Zhang X.,No203 Research Institute | Liu M.,No203 Research Institute | Wang Y.,No203 Research Institute | Dong G.,No203 Research Institute
Nanjing Hangkong Hangtian Daxue Xuebao/Journal of Nanjing University of Aeronautics and Astronautics | Year: 2012

According to the low performance-cost ratio of the "purchase after aero experiment" method, a method for missile batch acceptance based on hardware-in-the-loop simulation is presented. Firstly, the hardware-in-the-loop simulation experiment for the missile is prepared, and the batch sampling method is improved. Secondly, the parts of the missile are connected with simulation equipments, and the hardware-in-the-loop simulation experiment is carried out in accordance with time sequence. Finally, the simulation results are verified to decide whether to accept the batch of the missiles or not. The missiles are not need to be launched or destroyed due to the adoption of the hardware-in-the-loop simulation experiment, and large cost is saved. The combat effectiveness of the missile under different battlefields can be tested also, and the new method has incomparable advantages compared with the "purchase after aero experiment" method. The experimental results proves the validity of the new method. Source

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