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Fluid discrimination incorporating amplitude variation with angle inversion and squirt flow of the fluid

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Petrol.um Science 2022年第4期19卷 1592-1604页

作者： yu-Rong Wang Zhao-yun Zong xing-Yao Yin China university of Petrol.um QingdaoShandong266580China Shandong Provincial Key laboratory of Deep Oil and Gas QingdaoShandong266580China Pilot National laboratory for Marine Science and Technology(Qingdao) Shandong266580China

Pre-stack seismic inversion is an important method for fluid identification and reservoir characterization in exploration geophysics. In this study, an effective fluid factor is initially established based on Biot poroelastic theory, and a pre-stack seismic inversion method based on Bayesian framework is used to implement the fluid identification. Compared with conventional elastic parameters, fluid factors are more sensitive to oil and gas. However, the coupling effect between rock porosity and fluid content is not considered in conventional fluid factors, which may lead to fuzzy fluid identification results. In addition,existing fluid factors do not adequately consider the physical mechanisms of fluid content, such as squirt flow between cracks and pores. Therefore, we propose a squirt fluid factor(SFF) that minimizes the fluid and pore mixing effects and takes into account the squirt flow. On this basis, a novel P-wave reflection coefficient equation is derived, and the squirt fluid factor is estimated by amplitude variation with offset(AVO) inversion method. The new reflection coefficient equation has sufficient accuracy and can be utilized to estimate the parameters. The effectiveness and superiority of the proposed method in fluid identification are verified by the synthetic and field examples.

关键词： Fluid discrimination Poroelasticity theory linearized seismic reflectivity Pre-stack seismic inversion Squirt flow of fluid

Measurement-device-independent quantum secret sharing with hyper-encoding

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Chinese Physics B 2022年第10期31卷 307-313页

作者： xing-xing Ju Wei Zhong yu-Bo Sheng lan Zhou College of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China

Quantum secret sharing(QSS) is a typical multi-party quantum communication mode, in which the key sender splits a key into several parts and the participants can obtain the key by cooperation. Measurement-device-independent quantum secret sharing(MDI-QSS) is immune to all possible attacks from measurement devices and can greatly enhance QSS's security in practical applications. However, previous MDI-QSS's key generation rate is relatively low. Here, we adopt the polarization-spatial-mode hyper-encoding technology in the MDI-QSS, which can increase single photon's channel capacity. Meanwhile, we use the cross-Kerr nonlinearity to realize the complete hyper-entangled Greenberger-Horne-Zeilinger state analysis. Both above factors can increase MDI-QSS's key generation rate by about 10^(3). The proposed hyper-encoded MDI-QSS protocol may be useful for future multiparity quantum communication applications.

关键词： measurement-device-independent quantum secret sharing hyper-encoding technology cross-Kerr nonlinearity hyper-entangled Greenberger-Horne-Zeilinger state analysis

Numerical Study on the Vertical Water Exit of A Cylinder with Cavity

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China Ocean Engineering 2022年第5期36卷 734-742页

作者： ZHANG xing-yu l.u Xu-jian FAN Xu-dong School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing 210094China

When a high-speed body with cavity passes through water-air free surface and exits water,its mechanical environment and dynamic characteristics change significantly due to the great difference in density and viscosity between water and *** focusing on this problem,the Computational Fluid Dynamics(CFD)method is applied to perform numerical cal.ulation on the process of this vapor-liquid-gas flow during the water exit of a high-speed cylinder,with the Volume of Fraction(VOF)multiphase flow interface-capturing techniques and the overset grid *** the verification and validation of the CFD model through mesh convergence study and a water-entry experiment,cavity evolution and flow characteristics including pressure and velocity distribution during the water exit are *** effects of different initial velocities on the pressure distribution and drag characteristics of the cylinder are *** results show that the cavity collapse during water exit causes strong pressure fluctuation on the cylinder;when the cylinder exits water enveloped in a supercavity,the pressure distribution on its wall surface and surrounding water region is relatively uniform,and the drag changes gently,and thus the cylinder has good motion stability.

关键词： water exit cavity CFD

Proteome changes during bone mesenchymal stem cell differentiation into photoreceptor-like cells in vitro

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International Journal of Ophthalmology(English edition) 2011年第5期4卷 466-473页

作者： yu Hong Guo-xing Xu Fujian Institute of Ophthalmology The First Affiliated Hospital of Fujian Medical University Fuzhou 350005 Fujian Province China

Human bone marrow stem cell (BMSC) may be directed to differentiate into multiple cell types, including adipocyte, chondrocyte, osteocyte and photoreceptor, among others. At present, little is known about the features of the BMSC and the protein control mechanism underlying their differentiation into photoreceptor-like cells. In the present study, BMSCs are induced to differentiate into photoreceptor-like cells in an in vitro model simulating the in vivo microenvironment. up to 32 proteins are identified and differentially expressed through two-dimensional difference gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry to establish a differential protein database for photoreceptor-like cells from BMSC-induced differentiation. Western blot analysis further confirms the expression of some of the identified proteins. The present study proposes the total protein expression and possible molecular mechanism during the differentiation of BMSCs into photoreceptor cells.

关键词： bone marrow stem cell induced to differentiate photoreceptor-like cells

Changes in Phosphorus Fractions and Nitrogen Forms During Composting of Pig Manure with Rice Straw

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Journal of Integrative Agricul.ure 2013年第10期12卷 1855-1864页

作者： lü Dui-an YAN Bai-xing WANG li-xia DENG Zhi-qiang ZHANG yu-bin Key laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of Sciences university of Chinese Academy of Sciences College of Plant Science Jilin University

The study was conducted to reveal P fractions and N forms changing characters during composting of pig manure with rice *** composting,the NH 4 ＋-N concentration decreased and reached at a relatively low value（〈400 mg kg-1） in the final compost,while the NO 3--N concentration *** N losses mainly occurred during thermophilic phase due to the high temperature,the high NH 4 ＋-N concentration and the increase of pH *** inorganic P was dominated in the pig manure and initial compost *** composting,the proportion of labile inorganic P of total extracted P decreased,while the proportion of Fe＋Al-bound P,Ca＋Mg-bound P and residual P *** evolutions of the proportion of labile inorganic P,Fe＋Al-bound P and Ca＋Mg-bound P were well correlated with the changes of pH value,organic matter and C/N ***,composting could increase the concentration of N and P and decrease the presence of NH 4 ＋-N and labile P fractions which might cause environmental issues following land application.

关键词： composting nitrogen forms phosphorus fractions organic matter pig manure

Rogue wave solutions and rogue-breather solutions to the focusing nonlinear Schr?dinger equation

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Communications in Theoretical Physics 2024年第3期76卷 33-41页

作者： Si-Jia Chen xing lü College of Science Tianjin University of TechnologyTianjin 300384People's Republic of China Department of Mathematics Beijing Jiaotong UniversityBeijing 100044People's Republic of China Beijing laboratory of National Economic Security Early-warning Engineering Beijing Jiaotong UniversityBeijing 100044People's Republic of China

Based on the long wave limit method,the general form of the second-order and third-order rogue wave solutions to the focusing nonlinear Schr?dinger equation are given by introducing some arbitrary *** interaction solutions between the first-order rogue wave and one-breather wave are constructed by taking a long wave limit on the two-breather *** applying the same method to the three-breather solutions,two types of interaction solutions are obtained,namely the first-order rogue wave and two breather waves,the second-order rogue wave and one-breather wave,*** influence of the parameters related to the phase on the interaction phenomena is graphically *** occur among the rogue waves and breather *** the collisions,the shape of them remains *** abundant interaction phenomena in this paper will contribute to a better understanding of the propagation and control of nonlinear waves.

关键词： nonlinear Schrodinger equation rogue wave solutions interaction solutions

Androgen downregulation of miR-760 promotes prostate cancer cell growth by regulating Il6

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Asian Journal of Andrology 2021年第1期23卷 85-90页

作者： Shuo Wang Yong Yang yu-Dong Cao xing-xing Tang Peng Du Department of urology Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing)Peking University Cancer Hospital and InstituteBeijing 100142China

Prostate cancer(PCa)is one of the most common malignancies in Western *** have shown that androgen contributes to the progression of PCa,but how androgen promotes PCa remains largely ***,we demonstrated that androgen suppressed the expression of miR-760 depending on the interaction between androgen and androgen receptor(AR).miR-760 was downregulated in prostate cancer tissues compared with normal *** experiments showed that miR-760 downregulation promoted the proliferation and growth of lNCaP and 22rv1 *** contrast,miR-760 ectopic expression inhibited the proliferation of lNCaP and 22 rv1 *** synthesis was suppressed by ***,miR-760 bound to the 3 fuTR of interl.ukin 6(Il6).A mutation in the binding site disrupted their *** addition,silencing of Il6 suppressed the proliferation of lNCaP and 22 rv1 ***6 was upregulated in PCa *** study reveals that androgen downregulates miR-760 to promote the growth of PCa cells by regulating Il6.

关键词： androgen interl.ukin 6 miR-760 prostate cancer

Preparation and Characterization of Novel Ti-doped M-site Deficient Olivine liFePO_4

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Chinese Chemical letters 2006年第8期17卷 1093-1096页

作者： yu Heng SuN xing Quan l.u Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Graduate School of the Chinese Academy of Sciences Beijing 100039 College of Materials and Chemistry ＆ Chemical Engineering Chengdu University of Technology Chengdu 610059

A novel Ti-doped M-site deficient olivine liFePO4, i.e. li0.95Fe0.95Ti0.05PO4, was synthesized by a solid-state reaction method. XRD and VTR were used to characterize the as-prepared samples. As a cathode material for... 详细信息

关键词： liFePO4 Ti-doped M-site deficient rate capability cathode material.

light exposure during early life promotes learning in adulthood

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Science China(life Sciences) 2023年第4期66卷 887-888页

作者： Chuan xing Humingzu li Xiang yu State Key laboratory of Membrane Biology School of Life SciencesPeking-Tsinghua Center for Life Sciencesand Peking University McGovern InstitutePeking UniversityBeijing 100871China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Institute of Neuroscience and State Key laboratory of Neuroscience CAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China university of Chinese Academy of Sciences Beijing 100049China School of life Science and Technology ShanghaiTech UniversityShanghai 201210China Chinese Institute for Brain Research Beijing 102206China

light is essential for life on *** mammals,light is sensed by three cell types in the retina:rods and cones transduce light for image visualization and perception,while intrinsically photosensitive retinal ganglion cells(ipRGCs)transduce light for non-image visual functions,including light entrainment of circadian clocks,pupillary light reflex and mood regulation(Do and Yau,2010;leGates et al.,2014).Consistent with their functions,ipRGCs project directly to a number of subcortical brain regions,while rods and cones project to the lateral geniculate nucl.us,which in turn projects to the visual cortex.

关键词： cones life intrinsic