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Research in Astronomy and Astrophysics 2020年第1期20卷 27-34页

作者： Juan Miao Xin Wang Ting-ling Ren zhi-tao li National Space Science Center Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Predictions of the strength of solar cycles are important and are necessary for planning long-term missions.A new solar cycle 25 is coming soon,and the amplitude is needed for space weather *** predictions have been made using different methods and the values are drastically ***,since 2015 July 1,the original sunspot number data have been entirely replaced by the Version 2.0 data series,and the sunspot number values have changed *** this paper,using Version 2 smoothed sunspot numbers and aa indices,we verify the predictions for cycles 18-24 based on Ohl’s Precursor *** a similar-cycles method is used to evaluate the aa minimum of 9.7(±1.1)near the start of cycle 25 and based on the linear regression relationship between sunspot maxima and aa minima,our predicted Version 2maximum sunspot number for cycle 25 is 121.5(±32.9).

关键词： solar cycle sunspot geomagnetic aa indices

Numerical simulation of the impact of polymer rheology on polymer injectivity using a multilevel local grid refinement method

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Petroleum Science 2016年第1期13卷 110-125页

作者： Hai-Shan Luo Mojdeh Delshad zhi-tao li Amir Shahmoradi Center for Petroleum and Geosystems Engineering The University of Texas at Austin

Polymer injectivity is an important factor for evaluating the project economics of chemical flood,which is highly related to the polymer *** the flow rate varies rapidly near injectors and significantly changes the polymer viscosity due to the non-Newtonian rheological behavior,the polymer viscosity near the wellbore is difficult to estimate accurately with the practical gridblock size in reservoir *** reduce the impact of polymer rheology upon chemical EOR simulations,we used an efficient multilevel local grid refinement（LGR）method that provides a higher resolution of the flows in the near-wellbore *** efficient numerical scheme was proposed to accurately solve the pressure equation and concentration equations on the multilevel grid for both homogeneous and heterogeneous reservoir *** block list and connections of the multilevel grid are generated via an efficient and extensible *** case simulation results indicate that the proposed LGR is consistent with the analytical injectivity model and achieves the closest results to the full grid refinement,which considerably improves the accuracy of solutions compared with the original *** addition,the method was validated by comparing it with the LGR module of CMG_*** polymer injectivity calculations,the LGR method is applicable for other problems in need of near-wellbore treatment,such as fractures near wells.

关键词： reservoir refinement rheology multilevel flooding viscosity permeability heterogeneous rheological porosity

Thermodynamic Analysis and Experimental Study on Reaction of CO_2 Gas with Hot Metal

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Journal of Iron and Steel Research International 2016年第2期23卷 98-102页

作者： Guo WEI zhi-tao li Zi-liang li Qiang-jian GAO Feng-man SHEN School of Metallurgy Northeastern University

The reaction of CO2 gas with hot metal was investigated based on the thermodynamic analysis and experi- mental results. It shows that both silicon and carbon in hot metal can be oxidized by CO2 gas in the temperature range of 1300-1 500 ℃. When using graphite crucible, temperature has little influence on final mass percent of car bon w[c] because of the carburization effect. Decarburization degree rises significantly with increasing gas injection rate and w[c] can be reduced to 3.2% at most when using MgO crucible. *** temperature or higher gas injection rate is propitious to promote desilication reaction, but only 5%- 10% of desilication ratio could be obtained in 20 rain. The final mass percent of silicon W[si] when using MgO crucible is lower than that when using graphite crucible. Ex- perimental results also demonstrate that CO2 injection has no effect on the concentration of manganese, sulfur and phosphorus in hot metal. In view of the weak oxidation ability and temperature drop of hot metal, CO2 gas is sugges- ted to be used as carrier gas in desilication process rather than oxidizing agent.

关键词： hot metal desilication reaction decarburization reaction thermal equilibrium gas injection

Melatonin attenuates hepatic ischemia-reperfusion injury in rats by inhibiting NF-κB signaling pathway

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Hepatobiliary & Pancreatic Diseases International 2021年第6期20卷 551-560页

作者： Yao Gao zhi-tao li li Jin Jie lin Zheng-Lei Fan Zhong Zeng Han-Fei Huang Organ Transplantation Center the First Affiliated Hospital of Kunming Medical UniversityKunming 650032China

Background:The sterile inflammatory response is one of the key mechanisms leading to hepatic ischemia-reperfusion *** has been shown to prevent organ injuries,but its roles in the inflammatory response after hepatic ischemia-reperfusion injury have not been fully explored,especially in late ischemia-reperfusion *** present study aimed to investigate the roles and possible mechanisms of melatonin in the inflammatory response after hepatic ischemia-reperfusion ***:Sixty Sprague-Dawley rats were randomly divided into a sham group,ischemia-reperfusion injury group(I/R group),and melatonin-treated group(M+I/R group).The rats in the I/R group were subjected to 70%hepatic ischemia for 45 min,followed by 5 or 24 h of *** rats in the M+I/R group were injected with melatonin(10 mg/kg,intravenous injection)15 min prior to ischemia and immediately before *** and samples of ischemic liver lobes were harvested for future analysis,and the 7-day survival rate was assessed after hepatic ischemia-reperfusion ***:In comparison with the I/R group,the M+I/R group showed markedly decreased expression levels of inflammatory cytokines(IL-6 and TNF-α)and numbers of apoptotic hepatocytes(Pling pathway in the early and late stages of hepatic ischemia-reperfusion injury,alleviated the inflammatory response,protected the liver from ischemia-reperfusion injury,and increased the survival rate.

关键词： Melatonin Ischemia-reperfusion injury Inflammation NF-κB liver

Synthesis and Electrical Conductivities of Fully Conjugated Schiff Base Macrocycles Containing 1,3,4-Oxadiazole

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Chinese Chemical Letters 1999年第5期10卷 367-370页

作者： Shu WANG Wen Ting HUA zhi tao li(Department of Chemistry, Peking University. Beijing 100871) Department of Chemistry Peking University Beijing 100871 China

Conjugated Schiff base macrocycles containing 1,3,3-oxadiazole were prepared by [2 + 2] cyclic condensation of phenylenediamine with 2,5-bis(m-formyl-phenyl)-1,3,4-oxadiazole. These macrocycles with iodine or TCNQ pro... 详细信息

关键词： conjugated Schiff base macrocycles synthesis charge-transfer complexes

Inhibitory effects of cariporide on LPC-induced expression of ICAM-1 and adhesion of monocytes to smooth muscle cells in vitro

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Acta Pharmacologica Sinica 2006年第10期27卷 1326-1332页

作者： zhi li tao SONG Gui-zhen liU li-ying liU~2 Department of Pharmacology,Pharmaceutical College,Central South University,Changsha 410078,China Department of Pharmacology Pharmaceutical College Central South University Changsha China

Aim:To explore the effects of cariporide on the expression of intercellular adhe-sion molecule-1(ICAM-1)and the adhesion of monocytes to vascular smoothmuscle cells(SMC)in ***:Monocytes were isolated from humanperipheral blood by the Ficoll-Hypaque *** expression of ICAM-1 inSMC was detected by *** adhesion of monocytes to SMC was stimu-lated by lysophosphatidylcholine(LPC).The adhesion ratio of monocytes wasassayed by measuring protein *** intracellular pH([pH]i)of SMC wasmeasured with 2’,7’-bis(2-carboxyethyl)-5,6-carboxyfluorescein(BCECF).Results:Preincubation of SMC with LPC alone(5 μg/mL)for 4 h markedly enhanced theexpression of ICAM-1 in SMC and the rate of the adhesion of monocytes to SMCin a concentration-dependent and time-related *** simultaneously alsoinduced an increase of[pH]ivalue in *** concentration-dependentlyreduced the adhesion ratio of monocytes to SMC and the expression of ICAM-1in SMC induced by *** inhibitory effects of cariporide on the expression ofICAM-1 in SMC and the adhesion of monocytes to SMC also were associatedwith blocking LPC-induced elevation of the[pH]ivalue in ***:LPC-induced monocyte-SMC adhesion may be mediated via activation of theNa~+/H~+(NHE)*** action mechanism of cariporide may be related withinhibition of activation of the Na~+/H~+ exchanger of plasma membranes and ICAM-1expression on the surface of SMC induced by LPC.

关键词： Na~+/H~+ exchanger cariporide lysophosphatidylcholine intercellular adhesion molecule-l monocyte smooth muscle cells

Intravitreal bevacizumab with or without triamcinolone acetonide for diabetic macular edema： a meta-analysis of randomized controlled trials

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Chinese Medical Journal 2014年第19期127卷 3471-3476页

作者： liu Xiangdong Zhou Xiaodong Wang zhi li tao Jiang Bo Department of Ophthalmology Jinshan Hospital Fudan UniversityShanghai 201508 China

Background Intravitreal anti-vascular endothelial growth factor （anti-VEGF） drugs and corticosteroids are being widely used to treat diabetic macular edema （DME）. The purpose of this study was to evaluate further the efficacy and safety of intravitreal bevacizumab （IVB） alone in comparison with intravitreal bevacizumab combined with triamcinolone acetonide （IVB/IVT） in the treatment of DME. Methods Pertinent publications were identified through CNKI, PubMed, Medline, EMBASE, and the Cochrane Controlled Trials Register up to November 30, 2013. Two investigators independently assessed the quality of the trials, and changes in central macular thickness （CMT） and best-corrected visual acuity （BCVA） were extracted at 6 weeks and 3, 6, 12, and 24 months after the initial treatment. A meta-analysis was carried out to compare the results between the groups receiving IVB and IVB/IVT using the software RevMan 5.0. Results A total of six randomized controlled trials （RCTs） were identified and included. The meta-analysis revealed that a significant reduction of the CMT was observed at 3 months after the initial treatment in the IVB/IVT group compared to the IVB group （P=-0.001）. Also, changes in CMT at 6 weeks and 6, 12, and 24 months did not vary significantly between the IVB and IVB/IVT groups （P=0.53, 0.76, 0.34, and 0.09, respectively）. Similarly, changes in BCVA at 6 weeks and 3, 6, 12, and 24 months also did not vary significantly between the two groups （P=-0.66, 0.98, 0.81, 0.07, and 0.80, respectively）. The results were robust to sensitivity analyses. However, the rate of intraocular pressure （IOP） rise after intravitreal injections varied significantly between the IVB and IVB/IV＇r groups （P 〈0.01）. A publication bias was not detected by funnel plots, the Egger method, or the Begg method. Conclusions Results of this meta-analysis showed that the treatments with IVB alone and combined IVB/IVT were similarly effective in improving the visual acuity, and, to some degree; c

关键词： intravitreal injection bevacizumab triamcinolone acetonide diabetic macular edema meta-analysis

Effect of lamellarization on the microstructure and mechanical properties of marine 10Ni5CrMoV steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： tao Zou Yanwu Dong Zhouhua Jiang Shuyang Du Yushuo li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10Ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10Ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10Ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature

Overview of in-situ oxygen production technologies for lunar resources

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sheng Pang liangwei Cong Guoyu Qian Dong Wang Laishi li Yusheng Wu zhi Wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis

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大型土木工程结构的模型试验仿真

系统仿真学报 2008年第18期20卷 4987-4990页

作者：杜永峰邱志涛李慧兰州理工大学防震减灾研究所兰州730050

近年来仿真技术得到了迅速发展,在国民经济各个领域中都发挥出了重要的作用。大型土木工程结构试验不但试验周期长而且还要消耗大量的人力、物力和财力,试验中的某些现象较难捕捉,这些都给利用硬模型试验结果揭示结构损伤机理带来了困... 详细信息

近年来仿真技术得到了迅速发展,在国民经济各个领域中都发挥出了重要的作用。大型土木工程结构试验不但试验周期长而且还要消耗大量的人力、物力和财力,试验中的某些现象较难捕捉,这些都给利用硬模型试验结果揭示结构损伤机理带来了困难。利用仿真技术的无破坏性和可多次重复性就可以克服这些困难。通过一组厚板筏式基础试件的冲切损伤实例,说明了仿真技术在土木工程结构试验中的应用。利用有限元软件ADINA,较为理想地模拟了搁置于弹塑性地基上的筏板和仅有周边支承的普通平板在竖向荷载作用下发生冲切破坏时的裂缝分布和发展状况,为硬模型试验设计提供了有效的帮助,同时对解释硬模型试验的破坏机理发挥了重要的作用。

关键词：仿真冲切试验装置有限元损伤