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| 1 | Numerical investigation of dual-porosity model with transient transfer function based on discrete-fracture model显示文摘Based on the characteristics of fractures in naturally fractured reservoir and a discrete-fracture model, a fracture network numerical well test model is developed.Bottom hole pressure response curves and the pressure field are obtained by solving the model equations with the finite-element method. By analyzing bottom hole pressure curves and the fluid flow in the pressure field, seven flow stages can be recognized on the curves. An upscaling method is developed to compare with the dual-porosity model(DPM). The comparisons results show that the DPM overestimates the inter-porosity coefficient λ and the storage factor ω. The analysis results show that fracture conductivity plays a leading role in the fluid flow. Matrix permeability influences the beginning time of flow from the matrix to fractures. Fractures density is another important parameter controlling the flow. The fracture linear flow is hidden under the large fracture density.The pressure propagation is slower in the direction of larger fracture density. | Yizhao WAN Yuewu LIU Weiping OUYANG Guofeng HAN Wenchao LIU | 2016 | Applied Mathematics and Mechanics(English Edition)2016，37，5： | 7 |
| 2 | A GIS technology based potential eco-risk assessment of metals in urban soils in Beijing, China显示文摘 | Meie Wang Yanying Bai Weiping Chen Bernd Markert Chi Peng Zhiyun Ouyang | 2011 | Environmental Pollution2011，，： | 1 |
| 3 | Deter- mination and correlation of liquid-liquid equilibrium data for the ternary systems water-ethyl acetate-acetic acid and water- butyl acetate-acetic acid显示文摘 | Ouyang Fucheng Wang Guangquan Gao Weiping | 1985 | Journal of Chemical Industry and Engineering (China)1985，34，2： | 1 |
| 4 | Vegetative cover and PAHs accumulation in soils of urban green space显示文摘 | Chi Peng Zhiyun Ouyang Meie Wang Weiping Chen Wentao Jiao | 2011 | Environmental Pollution2011，，： | 1 |
| 5 | 查看详情显示文摘 | SuY Wang H LiuJ WeiP Cooks RG Ouyang Z | | 0，，16： | 1 |
| 6 | A strategy for metabolite identification using triple- quadrupole mass spectrometry with enhanced resolution and accurate mass capability 显示文摘 | MOHAMMED JEMAL ZHENG Ouyang ZHAO Weiping | 2003 | Rapid Commun Mass Spec- trom2003，17，： | 1 |
| 7 | 查看详情显示文摘 | Jjunju F P M LiA Badu-Tawiah A WeiP LiL Ouyang Z Roqan I S Cooks R G | | 0，，13： | 1 |
| 8 | Laplace metasurfaces for optical analog computing based on quasi-bound states in the continuum显示文摘Laplace operation,the isotropic second-order differentiation,on spatial functions is an essential mathematical calculation in most physical equations and signal processing.Realizing the Laplace operation in a manner of optical analog computing has recently attracted attention,but a compact device with a high spatial resolution is still elusive.Here,we introduce a Laplace metasurface that can perform the Laplace operation for incident lightfield patterns.By exciting the quasi-bound state in the continuum,an optical transfer function for nearly perfect isotropic second-order differentiation has been obtained with a spatial resolution of wavelength scale.Such a Laplace metasurface has been numerically validated with both 1D and 2D spatial functions,and the results agree well with that of the ideal Laplace operation.In addition,the edge detection of a concerned object in an image has been demonstrated with the Laplace metasurface.Our results pave the way to the applications of metasurfaces in optical analog computing and image processing. | DANPING PAN LEI WAN MIN OUYANG WEI ZHANG ALEXANDER A.POTAPOV WEIPING LIU ZIXIAN LIANG TIANHUA FENG ZHAOHUI LI | 2021 | Photonics Research2021，9，9： | 1 |
| 9 | Advanced production decline analysis of tight gas wells with variable fracture conductivity显示文摘Considering the characteristics that the fracture conductivity formed by hydraulic fracturing varies across space and time, a new mathematical model was established for seepage flow in tight gas fractured vertical wells which takes into account the effects of dual variable conductivity and stress sensitivity. The Blasingame advanced production decline curves of the model were obtained using the finite element method with hybrid elements. On this basis, the effects of fracture space and time dual variable conductivity and stress sensitivity on Blasingame curve were analyzed. The study shows that the space variable conductivity mainly reduces decline curve value at the early stage; the time variable conductivity can result in drops of the production and the production integral curves, leading to a S-shaped curve; dual variable conductivity is the superposition of the effects given by the two variable conductivities; both time and space variable conductivities cannot delay the time with which the formation fluid flow reaches the quasi-steady state. The stress sensitivity reduces the curve value gradually rather than sharply, delaying the time the flow reaching the quasi-steady state. Ignoring the effects of variable conductivity and stress sensitivity will not affect the estimation on well controlled dynamic reserves. However, it can result in large errors in the interpretation of fractures and reservoir parameters. Conventional advanced production decline analyses of a tight gas fractured well in the Sulige gas field showed that the new model is more effective and reliable than the conventional model, and thus it can be widely applied in advanced production decline analysis of wells with the same characteristics in other gas fields. | SUN Hedong OUYANG Weiping ZHANG Mian TANG Haifa CHEN Changxiao MA Xu FU Zhongxin | 2018 | Petroleum Exploration and Development2018，45，3： | 0 |
| 10 | Rapid Propagation of Three Herbal Species in a Newly Developed Temporary Immersion System显示文摘[Objective] This study aimed to develop a rapid propagation method in a novel temporary immersion bioreactor system(TIS) for herbal plantlets compared with solid culture method. [Method] Three herbal species,including Dendrobium candidum Wall. Ex Lindl(D. candidum),Anoectochilus roxburghii(Wall.) Lindl.(A. roxburghii) and Lilium davidii var. unicolor( L. davidii),were used and tested by TIS against solid culture method. [Result] When the two culture methods were compared,the multiplication rate of D. candidum in TIS was found to be 1∶24.71,which was 6.55 times to those of solid culture. The multiplication rate of A. roxburghii was higher than those of the solid culture,but the plantlets was poorer than those of solid culture at the last phase in bioreactor culture,under the culture condition tested. The multiplication rate in TIS of L. davidii was 1∶17.23 whilst the rate was only 1∶4.45 on solid culture,resulting larger bulbs than those in the solid culture. [Conclusion] The TIS designed in our study could provide a potential mean for industrial production of plantlets. However,the parameters vary greatly among different species,and it is to be optimized according to plant species. | Mingliang JIA Benhou ZHANG Weiping GAO Jishuang CHEN Pingkai OUYANG | 2013 | Agricultural Biotechnology2013，2，4： | 0 |
| 11 | Forward link outage performance of aeronautical broadband satellite communications显示文摘High-throughput satellites(HTSs) play an important role in future millimeter-wave(mm Wave) aeronautical communication to meet high speed and broad bandwidth requirements. This paper investigates the outage performance of an aeronautical broadband satellite communication system’s forward link, where the feeder link from the gateway to the HTS uses free-space optical(FSO) transmission and the user link from the HTS to aircraft operates at the mm Wave band. In the user link, spot beam technology is exploited at the HTS and a massive antenna array is deployed at the aircraft. We first present a location-based beamforming(BF) scheme to maximize the expected output signal-to-noise ratio(SNR) of the forward link with the amplify-and-forward(AF) protocol,which turns out to be a phased array. Then, by supposing that the FSO feeder link follows Gamma-Gamma fading whereas the mm Wave user link experiences shadowed Rician fading, we take the influence of the phase error into account, and derive the closed-form expression of the outage probability(OP) for the considered system. To gain further insight, a simple asymptotic OP expression at a high SNR is provided to show the diversity order and coding gain. Finally, numerical simulations are conducted to confirm the validity of the theoretical analysis and reveal the effects of phase errors on the system outage performance. | Huaicong KONG Min LIN Shiwen HE Xiaoyu LIU Jian OUYANG Weiping ZHU | 2021 | Frontiers of Information Technology & Electronic Engineering2021，22，6： | 0 |
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