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A study of sea level variability and its long-term trend in the South China Sea

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Acta Oceanologica Sinica 2016年第9期35卷 22-33页

作者： XU Ying LIN Mingsen zheng quan'an SONG Qingtao YE Xiaomin College of Information Science and Engineering Ocean University of China National Satellite Ocean Application Service State Oceanic Administration Key Laboratory of Space Ocean Remote Sensing and Application State Oceanic Administration Department of Atmospheric and Oceanic Science University of MarylandCollege Park

On the basis of the satellite maps of sea level anomaly（MSLA） data and in situ tidal gauge sea level data,correlation analysis and empirical mode decomposition（EMD） are employed to investigate the applicability of MSLA data,sea level correlation,long-term sea level variability（SLV） trend,sea level rise（SLR） rate and its geographic distribution in the South China Sea（SCS）.The findings show that for Dongfang Station,Haikou Station,Shanwei Station and Zhapo Station,the minimum correlation coefficient between the closest MSLA grid point and tidal station is *** suggests that the satellite altimeter MSLA data are effective to observe the coastal SLV in the *** the monthly scale,coastal SLV in the western and northern part of SCS are highly associated with coastal *** the seasonal scale,SLV of the coastal area in the western part of the SCS is still strongly influenced by the coastal current system in summer and *** Pacific change can affect the SCS mainly in winter rather than summer and the affected area mostly concentrated in the northeastern and eastern parts of the ***,the average SLR in the SCS is 90.8 mm with a rising rate of（5.0±0.4） mm/a during1993–*** SLR rate from the southern Luzon Strait through the Huangyan Seamount area to the Xisha Islands area is higher than that of other areas of the SCS.

关键词： South China Sea sea level variability correlation analysis empirical mode decomposition

Synthesis and Crystal Structure of (Bu_4N)_2Hg(i-mnt)_2

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Chinese Chemical Letters 2001年第2期12卷 185-186页

作者： He Gen zheng Qiong Hua JIN Xin quan XIN State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210093 Department of Chemistry Capital Normal UniversityBeijing 100037

The synthesis and the crystal structure of the title compound (Bu4N)(2)Hg(S2C=C(CN)(2))(2) 1 is reported herein. The crystal is attributed to trielinic system and space group P-1, fw=965.88. The crystal lattice parameters are a=9.45(1), b=15.827(2), c=17.619(2)Angstrom, alpha =108.12(2), beta =99.54(2), gamma =97.60(2)degrees, V=2421.9(8)Angstrom, mu (MoKalpha)=3.390mm(-1), Z=2, D-c=***(-3), F(000)=996, R=0.054, wR=0.058.

关键词： synthesis crystal structure mercury(II) complex isomaleonitrile dithiolate

Hawking Radiation of Charged Particles via Tunneling from a Cylindrically Symmetric Black Hole in Anti-de Sitter Space-Time

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Communications in Theoretical Physics 2006年第4X期46卷 643-646页

作者： YANG Shu-zheng JIANG Qing-quan LI Hui-Ling Institute of Theoretical Physics China West Normal University Nanchong 637002 China

Applying Parikh-Wilzcek＇s semi-classical quantum tunneling model, we study the Hawking radiation of charged particles as tunneling from the event horizon of a cylindrically symmetric black hole in anti-de Sitter space-time. The derived result shows that the tunneling rate of charged particles is related to the change of Bekenstein-Hawking entropy and that the radiation spectrum is not strictly pure thermal after taking the black hole background dynamical and self-gravitation interaction into account, but is consistent with the underlying unitary theory.

关键词： cylindrically symmetric black hole Bekenstein-Hawking entropy energy conservation charge conservation tunneling rate

Iatrogenic crystalline lens injury during intravitreal injection of triamcinolone acetonide: A report of two cases

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World Journal of Clinical Cases 2019年第22期7卷 3784-3791页

作者： Jing Su Li-Jun zheng Xin-quan Liu Department of Ophthalmology Longhua HospitalShanghai University of Traditional Chinese MedicineShanghai 200032China Department of General Surgery Shanghai Tenth People’s HospitalTongji UniversityShanghai 200072China

BACKGROUND Intravitreal injection has become an efficient approach for delivering drugs at therapeutic levels to the posterior segment in retinal ***,the increased frequency and number of intravitreal injections have raised concerns about their side *** manipulation during surgery is relatively simple,details of the procedure are easily *** crystalline lens injury is a rare complication caused by improper manipulation during surgical *** report two cases of crystalline lens injury during intravitreal injection of triamcinolone acetonide(TA)with the hope of providing an insight into this *** SUMMARY Case 1 was a 62-year-old woman with macular edema caused by central retinal vein occlusion in her right eye,and Case 2 was a 65-year-old man with macular edema caused by branch retinal vein occlusion in his right *** view of the patients’condition and economic constraints,an intravitreal injection of TA was *** to inappropriate manipulation during surgery,the lens was *** site of lens injury and clinical manifestations were different in the two *** treatment and continuous follow-up were carried *** therapeutic effect following phacoemulsification of the cataract was *** Well-defined surgical incision under proper anesthesia,sufficient patient information and proficient anatomical skills of the physician are mandatory to prevent this rare adverse *** and meticulous phacoemulsification of the cataract is suggested.

关键词： Crystalline lens Intravitreal injection Triamcinolone acetonide Iatrogenicinjury Case report

Embrittlement Mechanism due to Slow Cooling During Quenching for M152 Martensitic Heat Resistant Steel

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Journal of Iron and Steel Research International 2010年第6期17卷 60-66页

作者： YANG Gang WANG Chang LIU Xin-quan LIU zheng-dong Central Iron and Steel Research Institute Beijing 100081 China

The mechanism of brittleness of M152 martensitic heat resistant steel due to slow cooling during quenching was experimentally investigated. The mechanical property tests and microstructure observation were conducted by TEM and XRD. The results showed that the presence of irreversible brittleness during slow cooling of quenching for M152 steel is attributed to the continuous M23C6 precipitation along prior austenite grain boundaries and M2C along prior residual austenite film. The residual austenite in the steel was unstable and decomposed after the precipitation of second phase during the process of slow cooling of quenching. The low cooling rate within the temperature range from 820 ℃ to 660 ℃ plays a key role in impact toughness, and the precipitation of second phase in the same temperature range results in irreversible brittleness.

关键词： M152 martensitic heat resistant steel brittleness carbides decomposition residual austenite

quantum Tunneling Radiation of Reissner-Nordstrom de Sitter Black Hole with a Global Monopole

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Communications in Theoretical Physics 2006年第3期45卷 457-460页

作者： JIANG Qing-quan YANG Shu-zheng LI Hui-Ling Institute of Theoretical Physics West China Normal University Nanchong 637002 China

Applying Parikh＇s quantum tunneling model, we study the quantum tunneling radiation of Reissne- Nordstrom de Sitter black hole with a global monopole. The result shows that the tunneling rates at the event horizon and the cosmic horizon are related to Bekenstein-Hawking entropy if we take the energy conservation into consideration, and the true radiate spectrum is not precisely thermal.

关键词： Reissner-Nordstrom de Sitter black hole global monopole energy conservation tunneling rate

QoE-Driven DASH Multicast Scheme for 5G Mobile Edge Network

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Journal of Communications and Information Networks 2021年第2期6卷 153-165页

作者： Xiaobin Tan Lei Xu quan zheng Simin Li Bei Liu Laboratory for Future Networks the University of Science and Technology of ChinaHefei 230027China The 54th Research Institute of China Electronic Technology Corporation Shijiazhuang 050081.China

Dynamic adaptive streaming over HTTP(DASH)can adaptively select the appropriate video bitrate for mobile *** edge computing(MEC)scenario is of great benefit to improve the performance of mobile networks by providing computing and storage *** the utilization of spectrum resources can be improved by multicast transmission,but the performance of the multicast transmission will be directly affected by the selected grouping algorithm and resource allocation *** order to improve the quality of experience(QoE)of video users in the 5G MEC scenario,this paper proposes a QoE-driven DASH multicast scheme,which mainly covers the grouping algorithm and the adaptive bitrate(ABR)*** of all,we take the optimized target QoE as the basis for grouping and propose an adaptive grouping algorithm that can dynamically adjust the grouping ***,we design a joint optimization ABR algorithm based on the prediction of QoE,which comprehensively considers the process of resource allocation and bitrate decision-making based on the prediction of QoE of video segments in a certain forward-looking field of *** simulation results show that the proposed DASH multicast scheme performs well in QoE and fairness.

关键词： DASH mobile edge computing multicast quality of experience adaptive bitrate algorithm

Synthesis and Crystal Structure of a Novel Complex [Cu(Phen)_3](ClO_4)_2(btio)(H_2O)

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Chinese Journal of Structural Chemistry 2004年第3期23卷 247-251页

作者： ZHANGChen-Xi LIUZhan-quan LIAODai-zheng JIANGZong-Hui YANShi-Ping ScienceofCollege TianjinUniversityofScienceandTechnologyTianjin300222China DepartmentofChemistry NankaiUniversityTianjin300071China StateKeyLaboratoryofCoordinationChemistry NanjingJiangsu210093China

The title compound [Cu(Phen)3](ClO4)2(btio)(H2O), where btio = 2-(4- benzoyloxyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, has been prepared and structurally characterized by X-ray diffraction. It crystallizes in triclinic, space group P?with a = 13.049(4), b = 13.827(5), c = 14.860(5) , a = 71.736(6), b = 77.076(6), g = 87.054(6)? C50H43Cl2CuN8O13, Mr = 1098.36, V = 2481(1) 3, Z = 2, Dc = 1.470 g/cm3, m(MoKa) = 0.622 mm-1, F(000) = 1132, the final R = 0.0639 and wR = 0.1473 for 8705 independent reflections with Rint =0.0285. The title compound is composed of [Cu(Phen)3]2+ moiety , one btio, two perchlorate ions and one water molecule. The copper(II) ion is octahedrally coordinated by three 1,10-phenanthroline ligands. The outer sphere consisting of one btio, two perchlorate ions and one water molecule is combined with the inner by hydrogen bonds and electrostatic interactions.

关键词： crystal structure nitronyl nitroxide radical Cu(II) complex

Reversal of circularly polarized luminescence direction and an“onoff”switch driven by exchange between UV light irradiation and the applied direct current electric field

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Science China Chemistry 2022年第10期65卷 1945-1952页

作者： Kun Yao zheng Liu Hang Li Dan Xu Wen-Hua zheng Yi-Wu quan Yi-Xiang Cheng Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

We report the rational design of a dual stimulus-activated quaternary chiral emission nematic liquid crystals(Q-N*-LCs)containing light-driven chiral dopant R-S-R-1,a static chiral dopant S-2 and an achiral Nile Red(NR)in a nematic liquid crystal(SLC1717).The dopant R-S-R-1 acts as a dynamic chiral donor and an energy donor,and the achiral NR serves as a circularly polarized luminescence(CPL)emitter and energy ***,this kind of Q-N*-LCs appears reversal CPL emission direction(L-CPL)using 365 nm UV light irradiation compared with the initial state(R-CPL).Most importantly,the“On-Off”CPL switch behavior of Q-N*-LCs can be repeatedly driven by revoking or rearranging the applied direct current(DC)electric *** OR chiral information logic gate demonstrates that this dual driven Q-N*-LCs can be potentially used for chiral information storage and coding.

关键词： chiral supramolecular liquid crystals circularly polarized luminescence light and electricity dual stimuli-activated Förster resonance energy transfer

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