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| 1 | Analysis of decorrelator-based receivers for multirate DS/CDMA communications显示文摘 | Chen Jiangxin Urbashi Mitra | 1999 | IEEE Trans Vehicular Technology1999，，4： | 5 |
| 2 | Multi-beam and seismic investigations of the active Haima cold seeps,northwestern South China Sea显示文摘To confirm the seabed fluid flow at the Haima cold seeps,an integrated study of multi-beam and seismic data reveals the morphology and fate of four bubble plumes and investigates the detailed subsurface structure of the active seepage area.The shapes of bubble plumes are not constant and influenced by the northeastward bottom currents,but the water depth where these bubble plumes disappear(630–650 m below the sea level)(mbsl)is very close to the upper limit of the gas hydrate stability zone in the water column(620 m below the sea level),as calculated from the CTD data within the study area,supporting the“hydrate skin”hypothesis.Gas chimneys directly below the bottom simulating reflectors,found at most sites,are speculated as essential pathways for both thermogenic gas and biogenic gas migrating from deep formations to the gas hydrate stability zone.The fracture network on the top of the basement uplift may be heavily gas-charged,which accounts for the chimney with several kilometers in diameter(beneath Plumes B and C).The much smaller gas chimney(beneath Plume D)may stem from gas saturated localized strong permeability zone.High-resolution seismic profiles reveal pipe-like structures,characterized by stacked localized amplitude anomalies,just beneath all the plumes,which act as the fluid conduits conveying gas from the gas hydrate-bearing sediments to the seafloor,feeding the gas plumes.The differences between these pipe-like structures indicate the dynamic process of gas seepage,which may be controlled by the build-up and dissipation of pore pressure.The 3D seismic data show high saturated gas hydrates with high RMS amplitude tend to cluster on the periphery of the gas chimney.Understanding the fluid migration and hydrate accumulation pattern of the Haima cold seeps can aid in the further exploration and study on the dynamic gas hydrate system in the South China Sea. | Bin Liu Jiangxin Chen Li Yang Minliang Duan Shengxuan Liu Yongxian Guan Pengcheng Shu | 2021 | Acta Oceanologica Sinica2021，40，7： | 3 |
| 3 | Estimation of seawater movement based on reflectors from a seismic profile显示文摘Seismic oceanography is a new cross-discipline of reflection seismology and physical oceanography. The biggest difference between seismic oceanography and traditional reflection seismology is its research object of time-varied seawater. How to estimate the temporal variations of reflectors in water structure and make some corrections in seismic data are basic problems in seismic oceanography research. Here a method of estimation for seawater movement is provided based on the reflectors. The application results of this method to the simulated and field seismic data turn out to be acceptable. As compared with the previous research, this method has the advantages of low-dependence on migration velocity and dip of reflectors, and it is very suitable for correction in a spectral analysis using seismic data, which is very useful in the research of ocean energy budget. | HUANG Xinghui SONG Haibin BAI Yang CHEN Jiangxin LIU Boran | 2012 | Acta Oceanologica Sinica2012，31，5： | 1 |
| 4 | Optimizing TCP performance over cdma2000显示文摘 | Kandukuri S Chaponniere E Jiangxin Chen | 2003 | Personal Indoor and Mobile Radio Communications Proceedings2003，2，： | 1 |
| 5 | Quantification of N 2 O fluxes from soil–plant systems may be biased by the applied gas chromatograph methodology显示文摘 | Xunhua Zheng Baoling Mei Yinghong Wang Baohua Xie Yuesi Wang Haibo Dong Hui Xu Guanxiong Chen Zucong Cai Jin Yue Jiangxin Gu Fang Su Jianwen Zou Jianguo Zhu | 2008 | Plant and Soil2008，，1： | 1 |
| 6 | Quantification of N2O fluxes from soil–plant systems may be biased by the applied gas chromatograph methodology显示文摘 | Xunhua Zheng Baoling Mei Yinghong Wang Baohua Xie Yuesi Wang Haibo Dong Hui Xu Guanxiong Chen Zucong Cai Jin Yue Jiangxin Gu Fang Su Jianwen Zou Jianguo Zhu | 2008 | Plant and Soil (-)2008，，1： | 1 |
| 7 | Distinct BSRs and their implications for natural gas hydrate formation and distribution at the submarine Makran accretionary zone显示文摘To investigate the nature of gas hydrates in the Makran area,new high-resolution geophysical data were acquired between 2018-2019.The data collected comprise multibeam and two-dimensional multi-channel seismic reflection data.The multibeam bathymetry data show East-North-East(ENE)ridges,piggy-back basins,canyon and channel systems,and the morphology of the abyssal plain.Continuous and discontinuous bottom simulating reflectors(BSRs)occur in the piggy-back basins on most of the seismic profiles available.The BSRs cut the dipping layers with strong amplitude and reversed polarity.Discontinuous BSRs indicate a transition along a dipping high-permeable sand layers from gas-rich segment to the gas hydrate-bearing segment and sugge st alternating sediments of fine and relatively coarse grain size.Double BSRs are highly dynamic and attributed to slumps occurring in the study area.The BSRs induced by slumps are located both at deep and shallow depths,responding to the temperature or pressure variation.For the first time,BSRs are observed in the abyssal plain of the Makran area,being associated with anticline structures,which do not show large spatial continuity and are strongly conditioned by structural conditions such as anticlines and fluid migration pathways,including deep fault,gas chimney,and high-permeable sedimentary layer.Our results may help to assess the gas hydrate potential within the piggy-back basins and to determine the most promising target areas.Moreover,results about the abyssal plain BSR may help to locate hydrocarbon reservoirs in the deep ocean. | Bin LIU Waseem Haider SYED Jiangxin CHEN Xiguang DENG Li YANG Leonardo AZEVEDO Minliang DUAN Tingting WU Jinfeng MA Keliang LI | 2021 | Journal of Oceanology and Limnology2021，39，5： | 0 |
| 8 | Quantitative estimation of bubble volume fraction of submarine seep plumes by modeling seismic oceanography data显示文摘Submarine seep plumes are a natural phenomenon in which different types of gases migrate through deep or shallow subsurface sediments and leak into seawater in pressure gradient.When detected using acoustic data,the leaked gases frequently exhibit a flame-like structure.We numerically modelled the relationship between the seismic response characteristic and bubble volume fraction to establish the bubble volume fraction in the submarine seep plume.Results show that our models are able to invert and predict the bubble volume fraction from field seismic oceanography data,by which synthetic seismic sections in different dominant frequencies could be numerically simulated,seismic attribute sections(e.g.,instantaneous amplitude,instantaneous frequency,and instantaneous phase)extracted,and the correlation between the seismic attributes and bubble volume fraction be quantitatively determined with functional equations.The instantaneous amplitude is positively correlated with bubble volume fraction,while the instantaneous frequency and bubble volume fraction are negatively correlated.In addition,information entropy is introduced as a proxy to quantify the relationship between the instantaneous phase and bubble volume fraction.As the bubble volume fraction increases,the information entropy of the instantaneous phase increases rapidly at the beginning,followed by a slight upward trend,and finally stabilizes.Therefore,under optimal noise conditions,the bubble volume fraction of submarine seep plumes can be inverted and predicted based on seismic response characteristics in terms of seismic attributes. | Tonggang HAN Jiangxin CHEN Leonardo AZEVEDO Bingshou HE Huaning XU Rui YANG | 2023 | Journal of Oceanology and Limnology2023，41，2： | 0 |
| 9 | Nepheloid layer generation by gas eruption:unexpected experimental results显示文摘Knowledge of nepheloid layers is important to improve the understanding of physical,geological,and sedimentary processes from continental shelf to abyssal environments.We had not tried to study the nepheloid layers in a hydrate-associated tank until unexpected results occurred.Tank experimental results show that gas eruptions triggered intermediate nepheloid layers.Thus,we proposed a new mechanism of intermediate nepheloid layer generation by eruptions.The intermediate nepheloid layers were generated in uniform-density fluid,which indicated that stratified fluid is not a necessary condition for intermediate nepheloid layers.Sufficient space for advection and an oblique slope for detachment are the key ingredients for intermediate nepheloid layer generation by eruptions.Our experiments also offer a new experimental evidence for bottom nepheloid layer generation by earthquakes.Given the scale effects of laboratory experiment,it is important to determine whether submarine volcanic eruption or hydrate-associated venting causes intermediate nepheloid layer in the nature. | Chaoqi ZHU Sanzhong LI Jiangxin CHEN Dawei WANG Xiaoshuai SONG Zhenghui LI Bo CHEN Hongxian SHAN Yonggang JIA | 2023 | Journal of Oceanology and Limnology2023，41，2： | 0 |
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