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Two exact first-order k-space formulations for low-rank viscoacoustic wave propagation on staggered grids

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Petroleum Science 2023年第3期20卷 1521-1531页

作者： Hong-yu Zhou Yang Liu jing Wang China Universityof Petroleum(Bejing) State Key Laboratory of Petroleum Resources and Prospecting and CNPC Key Laboratory of Geophysical ProspectingBeijing102249China China University of Petroleum(Bejing) Karamay CampusKaramayXinjiang834000China

Wave propagation in the viscoacoustic media is physically dispersive and *** excluding the numerical dispersion error from the physical dispersion in the viscoacoustic wave simu-lation is indispensable to understanding the intrinsic property of the wave propagation in attenuated media for the petroleum exploration *** recent years,a viscoacoustic wave equation char-acterized by fractional Laplacian gains wide attention in geophysical ***,the first-order form of the viscoacoustic wave equation,often solved by the conventional staggered-grid pseu-dospectral method,suffers from the numerical dispersion error in time due to the low-order finite-difference *** is challenging to completely eliminate the error because the viscoacoustic wave equation contains two temporal derivatives,which stem from the time stepping and the amplitude attenuation terms,*** tackle the issue,we derive two exact first-order k-space viscoacoustic formulations that can fully exclude the numerical error from the physical *** the homoge-neous case,two formulations agree with the viscoacoustic analytical solution very well and have the same *** the heterogeneous case,our second k-space formulation is more efficient than the first one because the second formulation significantly reduces the number of the wavenumber-space mixed-domain operators,which are the expensive part of the viscoacoustic k-space ***-merical cases validate that the two first-order k-space formulations are effective and efficient alternatives to the current staggered-grid pseudospectral formulation for the viscoacoustic wave simulation.

关键词： Viscoacoustic K-space Staggered-grid Low-rank

Temperature dependence of the absolute rate constant for the reaction of ozone with dimethyl sulfide

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Journal of Environmental Sciences 2007年第6期19卷 641-643页

作者： WANG Hai-tao zha.G yu-jie MU yu-jing Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Absolute rate constants for the reaction of ozone with dimethyl sulfide （DMS） were measured in a 200-L Teflon chamber over the temperature range of 283-353 K. Measurements were carried out using DMS in large excess over ozone of 10 to 1 or greater. Over the indicated temperature range, the data could be fit to the simple Arrhenius expression as kDMS = （9.96 ± 3.61） × 10^-11 exp （-（7309.7 ± 1098.2）/T） cm^3/（molecule.s）. A compared investigation of the reaction between ozone and ethene had a kC2H4 value of （1.35 ± 0.11） × 10^-18 cm^3/（molecule.s） at room temperature.

关键词： rate constants ozone dimethyl sulfide (DMS) ethene

An implicit symmetry constraint of the modified Korteweg-de Vries (mKdV) equation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第10期9卷 1457-1462页

作者： Ying YOU jing yu Qiao-yun JIANG Department of Mathematics Zhejiang University Hangzhou 310027 China School of Science Hangzhou Dianzi University Hangzhou 310018 China College of Science Nantong University Nantong 226007 China

In this paper, an implicit symmetry constraint is calculated and its associated binary nonlinearization of the Lax pairs and the adjoint Lax pairs is carried out for the modified Korteweg-de Vries (mKdV) equation. After introducing two new inde-pendent variables, we find that under the implicit symmetry constraint, the spatial part and the temporal part of the mKdV equation are decomposed into two finite-dimensional systems. Furthermore we prove that the obtained finite-dimensional systems are Hamiltonian systems and completely integrable in the Liouville sense.

关键词： Implicit symmetry constraint Completely integrable Hamiltonian system Modified Korteweg-de Vries (mKdV) equation

Hydrate formation from liquid CO_(2) in a glass beads bed

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Chinese Journal of Chemical Engineering 2022年第3期35卷 185-191页

作者： Nan Li jing-yu Kan Chang-yu Sun Guang-Jin Chen State Key Laboratory of Heavy Oil Processing China University of Petroleum-Beijing at KaramayKaramay 834000China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

CO_(2)sequestration in marine sediments as solid hydrates is a potential way to capture and store anthropogenic CO_(2).In this study,hydrate formation from liquid CO_(2)in marine sediments was simulated in a glass beads bed,and the factors affecting the kinetics of hydrate formation were *** results indicated that the rapid initial hydrate formation with a high driving force always increases the mass transfer resistance,which slows down hydrate *** final ratio of water conversion is higher under conditions of low temperature and higher pressure.A smaller particle size is conductive to initial CO_(2)hydrate growth,but the water conversion ratio in a bed with larger particles is slightly *** with other factors,the change in water saturation has an obvious effect on the final water *** inhibit the initial hydrate formation during the injection process,in this paper,a kinetic inhibitor is proposed for pre-injection into marine *** work shows that at a low pressure,a lowconcentration inhibitor has an obvious inhibition effect on hydrate ***,at a high pressure,it is necessary to increase the concentration of inhibitor to produce an obvious inhibition effect.

关键词： Liquid CO_(2) Hydrate formation Sequestration Kinetic Water conversion

Hydrothermal Synthesis and Crystal Structure of a Hybrid Compound Based on β-Octamolybdate [Mn(2,2’-bipy)_3]_2[β-Mo_8O_(26)]·4H_2O

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1164-1168页

作者： SHEN yue yu Li NIU jing-Yang WANG jing-Ping School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A hybrid compound [Mn（2,2＇-bipy）3]2[β-Mo8O26]·4H2O prepared by the hydrothermal method consists of a [β-Mo8O26]^4- isopolyanion, two isolated manganese-bipyridyl units [Mn（2,2＇-bipy）3]^2＋ and four crystal water molecules. Each [Mn（2,2＇-bipy）3]^2＋ is defined by six nitrogen atoms from three 2,2＇-bipyridine molecules forming a distorted MnN6 octahedron. Crystallographic data for the title compound： monoclinic, space group P21/c, a = 12.156（2）, b = 13.738（3）, c = 21.949（4） A,β = 90.44（3）°, V = 3665.3（13） A^3, Mr = 2302.57, Z = 2, Dc = 2.086 g/cm^3, F（000） = 2252, T= 293（2） K,μ（Mo-Kα） = 1.745 mm^-1, R = 0.0436, wR = 0.1056, and GOF = 1.074 for 550 parameters and 5515 observed reflections with I 〉 2σ（I）.

关键词： hydrothermal synthesis isopolyanion crystal structure octamolybdate

Overexpression of the stress-induced OsWRKY08 improves osmotic stress tolerance in Arabidopsis

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Chinese Science Bulletin 2009年第24期54卷 4671-4678页

作者： SONG yu jing ShaoJuan yu DiQiu Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Kunming 650223 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

Previous Northern blotting analyses of rice seedlings have screened several WRKY genes among the transcripts that are differentially regulated in the following treatments: high salinity, cold stress, polyethylene glycol (PEG) and heat shock. Here, we report characterization of a WRKY gene, OsWRKY08, in rice, which was found to be inducible by PEG, NaCl, Abscisic acid (ABA), and naphthalene acetic acid (NAA) as its ortholog AtWRKY28 in Arabidopsis. To determine whether overexpression of OsWRKY08 alters abiotic stress tolerance, 35S::OsWRKY08 recombinant was generated and transformed into Arabidopsis. Physiological tests indicated that 35S::OsWRKY08 transgenic Arabidopsis displayed increased tolerance to mannitol stress through increasing the lateral root number and primary root length during seeding root development. Further, semi-quantitative RT-PCR showed that AtCOR47 and AtRD21, two ABA-independent abiotic stress responded genes, were induced in 35S::OsWRKY08 transgenic plants. These results suggest OsWRKY08 improves the osmotic stress tolerance of transgenic Arabidopsis through an ABA-independent signaling pathway.

关键词：转基因拟南芥渗透胁迫应力诱发 Northern杂交 35S启动子非生物胁迫水稻幼苗 WRKY

Effects of water and fertilizer deficit regulation with drip irrigation at different growth stages on fruit quality improvement of kiwifruit in seasonal arid areas of Southwest China

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Journal of Integrative Agriculture 2023年第10期22卷 3042-3058页

作者： zha.yu-xuan CHEN Fei WANG Zhi-hui JIANG Shou-zheng CUI Ning-bo State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065P.R.China

For a long time,seasonal drought occurs frequently in Southwest China,and the management of water and fertilizer in kiwifruit orchards has no quantitative standards,which seriously affects the yield and quality of ***,the effects of water and fertilizer deficit regulation with drip irrigation(WFDRDI)on the quality of kiwifruit at different growth stages were explored to achieve water and fertilizer saving,and green and efficient production of *** select‘Jin Yan'kiwifruit and set two water deficit levels(W_(D20%)and W_(D40%))and three fertilizer deficit levels(F_(D15%),F_(D30%)and F_(D45%))at bud burst to leafing stage(stageⅠ),flowering to fruit set stage(stageⅡ),fruit expansion stage(stageⅢ)and fruit maturation stage(stageⅣ),respectively,with a full irrigation and fertilization as the control treatment(CK)in 2017and *** showed that the WFDRDI at stageⅡandⅢhad significant effect on fruit physical quality of kiwifruit,specifically,theⅢ-WD40%F_(D30%)andⅢ-W_(D20%)F_(D45%)treatments significantly increased fruit firmness by 13.62 and 15.59%(P<0.05),respectively;theⅡ-W_(D40%)F_(D15%)andⅢ-W_(D40%)F_(D15%)treatments significantly increased dry matter by 8.19 and 6.47%(P<0.05),respectively;theⅢ-W_(D20%)F_(D15%)treatment significantly increased single fruit weight and fruit volume by 9.33 and 12.65%(P<0.05),respectively;theⅡ-W_(D20%)F_(D15%)treatment significantly increased fruit water content by 1.99%(P<0.05).The WFDRDI had an obvious effect on fruit chemical quality of ***Ⅲ-W_(D20%)F_(D45%),Ⅳ-W_(D40%)F_(D15%)andⅣ-W_(D20%)F_(D30%)treatments significantly increased vitamin C(Vc)content by 69.96,36.96 and 34.31%(P<0.05),respectively;theⅢ-W_(D40%)F_(D15%)andⅣ-W_(D40%)F_(D15%)treatments significantly increased total soluble solid(TSS)content by 3.79 and 17.05%(P<0.05),respectively,and significantly increased soluble sugar content by 28.61 and 34.79%(P<0.05),respectively;the contents of fructose,glucose and sucrose also had a significan

关键词： water deficit fertilizer deficit water and fertilizer coupling fruit physical quality fruit chemical quality

Thermal Decomposition Behavior of Terephthalate in Inert Gas

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China Petroleum Processing & Petrochemical Technology 2017年第3期19卷 1-8页

作者： yu jing Wang Jiming Key Laboratory of Advanced Control and Optimization for Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237 DuPont China Holding Co. LtdShanghai 201203 School of Chemical Engineering East China University of Science and TechnologyShanghai 200237

Several metal terephthalates were synthesized by hydrothermal solvent method. Firstly, the coordination type of metal ions and carboxylates in terephthalate was studied by FTIR spectroscopy. The results showed that the binding type of zinc terephthalate and aluminum terephthalate are mainly bridged coordination, while the chelating coordination mode dominated in the magnesium terephthalate and cerium terephthalate. Secondly, the thermal decomposition mechanism of zinc terephthalate in nitrogen atmosphere was studied by TG and Py-GC/MS techniques. Finally, the activation energy of the thermal decomposition process was obtained by the Friedman method and the Flynn-Wall-Ozawa(FWO) method, and the most probabilistic function was obtained by multiple linear fitting. The results showed that the decomposition process of zinc terephthalate was an one-step reaction and the activation energy was equal to 187.38 kJ/mol.

关键词： terephthalate TG/DTG thermal decomposition mechanism kinetics

Characterization of intraocular pressure pattern and changes of retinal ganglion cells in DBA2J glaucoma mice

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International Journal of Ophthalmology(English edition) 2016年第2期9卷 211-217页

作者： jing Wang yu Dong Cullen Eye Institute Baylor College of Medicine

AIM： To characterize the pattern of intraocular pressure （lOP） change and the deficit of retinal ganglion cells （RGCs） in DBA2J, which is most well-characterized chronic glaucoma mouse model and wild type （WT） C57bl/6 mice, and to study the relationship between lOP change and RGCs deficit. METHODS： lOP was monitored with a rebound tonometer in C57bl/6 and DBA2J mice from 3 to 15-month-old. Retinal function was evaluated by dark -adapted electroretinogram （ERG） in DBA2J and WT mice of 15-month-old. A dye （Neurobiotin） was applied to optic nerve stump to retrograde label RGCs. TO-PRO-3 visualized all nuclei of cells in the RGC layer. RESULTS： The lOP in WT mice was 9.03-0.6 mm Hg on average and did not increase significantly as aging. The lOP in DBA2J mice, arranging from 7.2 to 28 mm Hg, was increasing significantly as aging, and it was normal at 3-month--old compared with WT mice, slightly increased from 7-month-old and increased in 50% animals at 11-month-old and in 38% animals at 15-month-old. The RGCs density in DBA2J mice started reducing by 7-month-old, continuously decreased until reached about 20% of RGC in WT retina by 15-month-old. RGC density was not linearly correlated with lOP in 15-month- old DBA2J mice. The amplitude of positive scotopic threshold response, and negative scotopic threshold response of ERG were significantly reduced in DBA2J mice of 15-month-old than that in age-paired WT mice. CONCLUSION： The present study found that DBA2J mice display pathological and functional deficits of the retina that was not linearly correlated with lOP.

关键词： retinal ganglion cell glaucoma intraocularpressure retina mouse