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| 1 | Passive source range estimation with a single receiver in shallow water显示文摘An approach for long-range passive impulsive source ranging with a single receiver in shallow water is proposed,which utilizes the frequency spectrum of the warped signal autocorrelation function via warping transform.For an ideal waveguide,there are invariable frequency features both in the frequency spectrum of the warped signal corresponding to modal cut-off frequencies and the warped signal autocorrelation function due to modal interference.These intrinsic frequency features can be used to passive source ranging.So,the approximate relationship between the frequency of warped signal at an unknown source range and the intrinsic frequency extracted by the time warping transform is derived.These rules can be generalized to an actual shallow water waveguide.Employing an acoustic model to offer the invariable frequency spectrum features,the impulsive signal data collected by a single hydrophone in the North Yellow Sea in December 2011 are analyzed to verify the proposed source ranging approach.The estimated ranges are in good agreement with the ranges measured by GPS,and the mean relative error of range estimation is less than 10%. | QI Yubo ZHOU Shihong REN Yun WANG Dejun LIU Jianjun FENG Xiqiang | 2015 | Chinese Journal of Acoustics2015，34，1： | 13 |
| 2 | Bifurcations in penetrative Rayleigh-Be′nard convection in a cylindrical container显示文摘The bifurcations of penetrative Rayleigh-B′enard convection in cylindrical containers are studied by the linear stability analysis(LSA) combined with the direct numerical simulation(DNS) method. The working ?uid is cold water near 4?C, where the Prandtl number P r is 11.57, and the aspect ratio(radius/height) of the cylinder ranges from 0.66 to 2. It is found that the critical Rayleigh number increases with the increase in the density inversion parameter θ_m. The relationship between the normalized critical Rayleigh number(Rac(θ_m)/Rac(0)) and θ_m is formulated, which is in good agreement with the stability results within a large range of θ_m. The aspect ratio has a minor effect on Rac(θ_m)/Rac(0). The bifurcation processes based on the axisymmetric solutions are also investigated. The results show that the onset of axisymmetric convection occurs through a trans-critical bifurcation due to the top-bottom symmetry breaking of the present system.Moreover, two kinds of qualitatively different steady axisymmetric solutions are identi?ed. | Chuanshi SUN Shuang LIU Qi WANG Zhenhua WAN Dejun SUN | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，5： | 2 |
| 3 | Global DNA hypomethylation, rather than reactive oxygen species (ROS), a potential facilitator of cadmium-stimulated K562 cell proliferation显示文摘 | Dejun Huang Yingmei Zhang Yongmei Qi Che Chen Weihong Ji | 2008 | Toxicology Letters2008，，1： | 1 |
| 4 | Forward modeling of total magnetic anomaly over a pseudo-2D underground ferromagnetic pipeline显示文摘 | GUO Zhiyong LIU Dejun PAN Qi | 2015 | Journal of Applied Geophysics2015，113，： | 1 |
| 5 | Transmission of low-energy electrons through SiOz tube显示文摘 | Wang Wei Qi Dejun Yu Deyang | 2009 | J Phys: Conf Ser2009，163，01： | 1 |
| 6 | Expression Profiles of 10,422 Genes at Early Stage of Low Nitrogen Stress in Rice Assayed using a cDNA Microarray显示文摘 | Xingming Lian Shiping Wang Jianwei Zhang Qi Feng Lida Zhang Danlin Fan Xianghua Li Dejun Yuan Bin Han Qifa Zhang | 2006 | Plant Molecular Biology2006，，5： | 1 |
| 7 | High temperature induced masculinization of zebrafish by down-regulation of sox9b and esr1 via DNA methylation显示文摘Elevated temperature could influence the sex differentiation by altering the expression of sex-related genes in fish.However, the underlying mechanisms by which the gene expression is altered remain poorly understood.Here, we aimed to explore the role of DNA methylation in sex differentiation of zebrafish(Danio rerio) in response to elevated temperature.The results showed that high temperature(33℃) exposure of fish from 20 to 30 days post fertilization(dpf), compared to normal temperature(28℃), resulted in male-biased sex ratio and decreased expression of female-related genes including cyp19a1a, sox9b and esr1.Meanwhile, the expressions of DNA methyltransferases dnmt3a1 and dnmt3a2, and the DNA methylation levels in sox9b and esr1 promoter were significantly increased by high temperature, strongly implying that DNA methylation is involved in high temperature-induced masculinization of zebrafish.Co-treatment with 5-aza-2-deoxycytidine(a DNA methylation inhibitor) attenuated the high temperature-induced masculinizing effect, recovered the expression of esr1 and sox9b, suppressed the transcription of dnmt3a1 and dnmt3a2, and decreased the methylation of esr1 and sox9b promoter, further confirming that DNA methylation plays an important role in high temperature-induced masculinization of zebrafish.Furthermore, the methylation of sox9b promoter decreased the enrichment of transcription factor CREB(cAMP-responsive element binding proteins).Overall, these findings suggest that high temperature induce masculinization of zebrafish by down-regulation of femalerelated genes via DNA methylation, providing a new insight in understanding the epigenetic mechanism of thermal-mediated sex differentiation in fish. | Jiangyuan Han Yan Hu Yongmei Qi Cong Yuan Sajid Naeem Dejun Huang | 2021 | Journal of Environmental Sciences2021，33，9： | 1 |
| 8 | Synergic effect of 3′-azido-3′-deoxythymidine and arsenic trioxide in suppressing hepatoma cells显示文摘 | Che Chen Yingmei Zhang Yong Wang Dejun Huang Yaming Xi Yongmei Qi | 2011 | Anti-Cancer Drugs2011，，5： | 1 |
| 9 | General Reductive Amination of Aldehydes and Ketones with Amines and Nitroaromatics under H2 by Recyclable Iridium Catalysts显示文摘异构的铱催化剂与 nitroaromatics 和胺使用 H 2 被准备并且申请醛和酉同类的减少的胺化作用。铱催化剂被离子的液体 1-methyl-3-cyanomethylimidazoulium 氯化物的热分解准备([MCNI ] Cl ) 与铱氯化物(在激活的碳的 IrCl 3) 。铱粒子在做 N 的碳材料从是驱散的井和马厩[MCNI ] 有激活的碳的 Cl。Ir@NC (600-2h ) 催化剂被发现用 H 2 和许多硝基苯为醛和酉同类的减少的胺化作用高度活跃、选择,胺有选择地被变换成相应的第二等、第三级的胺。没有明显的释放, Ir@NC (600-2h ) 催化剂能若干次是可重用的。 | Dejun Sui Fei Mao Haipeng Fan Zhengliang Qi Jun Huang | 2017 | Chinese Journal of Chemistry2017，35，9： | 0 |
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