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NUMERICAL INVESTIGATION OF SEABED INTERACTION IN TIME DOMAIN ANALYSIS OF MOORING CABLES

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Journal of Hydrodynamics 2006年第4期18卷 424-430页

作者： YU long TAN jia-hua School of Naval Architecture and Civil Engineering Shanghai Jiaotong University Shanghai 200030 China

In this paper, an efficient two-dimensional finite element model for numerical analysis of mooring cables and seabed interaction has been built. Geometric shape and dynamics of mooring cables are computed in time domain, accounting for the motions of the moored sturcture. In the model, a hybrid beam element is employed to simulate the mooring cable while the seabed is simulated by application of different soil constitutive models. After the elastic and elastic-plastic soil constitutive models have been used for computation, tensions and offsets of mooring cables at fairlead point are also compared accounting for friction effect between cables and seabed. Both transversal and longitudinal behaviors are studied at different water depths.

关键词： dynamics of mooring cable seabed interaction soil constitutive models

Effects of relative humidity on the characterization of a photochemical smog chamber

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Journal of Environmental Sciences 2011年第12期23卷 2013-2018页

作者： Gaoshuo Hu Yongfu Xu long jia State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Water vapor plays an important role in many atmospheric chemical reactions. A self-made indoor environmental smog chamber was used to investigate the effects of relative humidity （RH） on its characterization, which included the wall effects of reactive species such as O3 and NOx, and the determination of chamber-dependent OH radicals in terms of CO-NOx irradiation experiments. Results showed that the rate constant of O3 wall losses increased with increasing RH, and that their relationship was linearly significant. Although RH aflected the rate constant of NOx wall losses, their relationship was not statistically significant. Background air generated a small amount of ozone at both high and low RH. When RH varied from 5% to 79%, the apparent rate constant kNO2→HONO for the conversion of NO2 into gas phase HONO was estimated in the range of 0.70×10-3–2.5×10-3 min-1. A linear relationship between kNO2→HONO and RH was obtained as kNO2→HONO （10-3 min-1） = –0.0255RH ＋ 2.64, with R2 and P value being 0.978 and 0.01. To our knowledge, this is the first report on their relationship. The generation mechanism for HONO and OH was also discussed in this work.

关键词： chamber characterization relative humidity wall effects OH radicals

Evolution of the Level of Sunspot Activity in Solar Cycles I. Evolution in the Descending Phase

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Chinese Journal of Astronomy and Astrophysics 2006年第3期6卷 354-362页

作者： jia-long Wang National Astronomical Observatories Chinese Academy of Sciences Beijing 100012

Taking the 13-point smoothed monthly sunspot number,Ri, and the deviation of the 13 associated monthly sunspot numbers from the smoothed one, Di, as a number-pair describing the global level of sunspot activity, the evolution of the level is statistically studied for the period from the month which is just 48 months before the minimum to the minimum in the descending phase, using the observed data of Solar Cycles 10 to 22. Our results show （1） for 46 months （94%） of the studied 49 months it is found that for a given month, the distribution of the 13 pairs which come from the 13 solar cycles on a log Ri - Di plane may be fitted by a straight line with a correlation coefficient larger than the critical one at confidence level a = 5%, and for 36 months （73%） the fitting is even better, for a = 1%; （2） time variations of these two parameters and their correlations in the studied period can be described respectively by functions of time, whose main trends may be expressed by a linear or simple curvilinear function; （3） the evolutionary path of the level of sunspot activity may be represented by a logarithmic function as log/~ = 0.704 lnDi - 0.291.

关键词： Sun - sunspots - active level evolution

低腐蚀、高效相变吸收体系CO_(2)捕集性能及机理研究

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现代化工 2025年第1期45卷 163-169,177页

作者：秦森戴姗姗范伟李梅杨嘉龙西南石油大学化学化工学院四川成都610500 教育部油田化学工程研究中心四川成都610500 中国石油天然气股份有限公司长庆油田勘探开发研究院陕西西安710016

液-液相变吸收剂作为碳捕集领域最具节能潜力的新兴吸收剂仍存在CO_(2)容量有限、腐蚀性强等缺点。以富含氨基的聚酰胺-胺树状大分子(PAMAM)为阳离子、具有含N杂环的2-甲基咪唑(2-MI)为阴离子合成离子液体(ILs),并与水和二乙二醇丁醚(DG... 详细信息

液-液相变吸收剂作为碳捕集领域最具节能潜力的新兴吸收剂仍存在CO_(2)容量有限、腐蚀性强等缺点。以富含氨基的聚酰胺-胺树状大分子(PAMAM)为阳离子、具有含N杂环的2-甲基咪唑(2-MI)为阴离子合成离子液体(ILs),并与水和二乙二醇丁醚(DGBE)构建液-液相变吸收剂。以多氨基协同吸收的方式大幅度提升CO_(2)吸收性能,其CO_(2)容量可达4.98 mol CO_(2)/mol ILs,富CO_(2)相体积分数仅为28.7%,且腐蚀性仅为单乙醇胺(MEA)溶液的13.87%。^(13)CNMR分析结果表明,吸收机理遵循两性离子机理及碱性水合机制。用Kamlet-Taft法量化极性发现,相分离现象的发生与极性、密度、黏度变化密切相关。

关键词： CO_(2)捕集功能化离子液体相变吸收剂吸收机理相变机理

Interwrapping Distinct Metal-Organic Frameworks in DualMOFs for the Creation of Unique Composite Catalysts

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Research 2021年第1期2021卷 1213-1224页

作者： jia-long Ling Kai Chen Chuan-De Wu State Key Laboratory of Silicon Materials Department of ChemistryZhejiang UniversityHangzhou 310027China

Incorporating metal nanoparticles(MNPs)inside metal-organic frameworks(MOFs)demonstrates superior catalytic properties in numerous reactions;however,the size and distribution of MNPs could not be well controlled,resulting in low product selectivity in catalysis by undergoing different catalytic reaction *** report herein a facile strategy for integrating lattice-mismatched MOFs together to fabricate homogeneously distributed“dual-MOFs,”which are the ideal precursors for the preparation of MNPs@MOFs with unique catalytic *** a proof of concept,we successfully synthesize a dual-MOF HKUST-1/ZIF-8 for in situ creation of redox-active Cu NPs inside hierarchical porous ZIF-8 under controlled pyrolytic *** the advantages of size-tunable Cu NPs in the molecular sieving matrix of ZIF-8,Cu@ZIF-8 demonstrates high activity and selectivity for transformation of alkynes into alkenes without overhydrogenation,which surpasses most of the catalysts in the ***,this work paves a new pathway for developing highly efficient and selective heterogeneous catalysts to produce highly value-added chemicals.

关键词： properties. selectivity proof

PD-1/PD-L1 pathway blockade works as an effective and practical therapy for cancer immunotherapy

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Cancer Biology & Medicine 2018年第2期15卷 116-123页

作者： long jia Qi Zhang Rongxin Zhang Laboratory of Immunology and Inflammation Department of Immunology and Research Center of Basic Medical SciencesKey Laboratory of Immune Microenvironments and Diseases of Educational MinistryTianjin Medical University Institute of Integrative Medicines for Acute Abdominal Diseases Tianjin Nankai Hospital Guangdong Province Key Laboratory for Biotechnology Drug Candidates School of Life Sciences and BiopharmaceuticsGuangdong Pharmaceutical University

Cancer immunotherapy has greatly advanced in recent years,and PD-1/PD-L1 blocking therapy has become a major pillar of *** clinical trials of PD-1/PD-L1 blocking therapies in cancer treatments have benefited many patients,which promoted the Food and Drug Administration(FDA)approval of PD-1/PD-L1 blocking *** this review,we provide a detailed introduction of five PD-1/PD-L1 blocking drugs,with indications and studies,as a valuable reference for doctors and medical ***,the characteristics of PD-1/PD-L1 blocking therapies,including their universality and sustainability,are discussed in this ***,we also discuss and predict the possibility of PD-L1 as an indication marker of PD-1/PD-L1 blocking therapy for pan-cancer treatment,and the current status of combination therapies.

关键词： PD-1 PD-L1 cancer immunotherapy

Smog Chamber Study on the Ozone Formation Potential of Acetaldehyde

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Advances in Atmospheric Sciences 2021年第7期38卷 1238-1251页

作者： Hailiang ZHANG Yongfu XU long jia Min XU State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric Chemistry and Environmental Sciences College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China

Acetaldehyde is one of the important VOC species of O_(3)precursors in the atmospheric *** influences of relative humidity(RH)and initial VOC/NOx ratio(R_(CN))on the formation of O_(3)are studied in smog chamber experiments,and the MCM v3.3.1 mechanism of acetaldehyde is modified based on the experimental *** low-RH conditions(RH=11.6%±1.1%),the O_(3)concentration at 6 h increases first and then decreases with the increase of R_(CN),and the R_(CN)at the inflection point of O_(3)concentrations is *** high-RH experiments(RH=78.8%±1.0%),variation of the O_(3)concentration at 6 h with R_(CN)is similar to that in low-RH experiments,but the R_(CN)at the inflection point is *** has no significant effect on the O_(3)concentrations under low R_(CN)(3).Compared with the experimental results,original MCM v3.3.1 greatly underestimates the O_(3)*** of both the photolysis process of peroxyacetyl nitrate and the photolysis process of HNO_(3)on the reactor surface into the original MCM can reduce the difference between the simulated O_(3)concentrations and the experimental results at 6 h from 24%−35%and 17%−49%to 6%−26%and 10%−42%under low-and high-RH conditions,*** maximum incremental reactivity(MIR)of acetaldehyde simulated with the modified MCM is 4.0 ppb ppb−1 without considering the effect of other VOCs.

关键词： ozone acetaldehyde photochemical reaction MCM

Verification of a Similar Cycle Prediction for the Ascending and Peak Phases of Solar Cycle 23

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Chinese Journal of Astronomy and Astrophysics 2002年第5期2卷 396-398页

作者： jia-long Wang jian-Cun Gong 等 NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 CenterforSpaceScienceandAppliedResearch ChineseAcademyofSciencesBeijing100080

Reviews of long-term predictions of solar cycles have shown that a precise prediction with a lead time of 2 years or more of a solar cycle remains an unsolved problem. We used a simple method, the method of similar cycles, to make long-term predictions of not only the maximum amplitude but also the smoothed monthly mean sunspot number for every month of Solar Cycle 23. We verify and compare our prediction with the latest available observational results.

关键词： Sun: sunspots - solar-terrestrial relations

Sodium-ion conducting polymer electrolytes

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Rare Metals 2023年第1期42卷 1-16页

作者： Zhi-Yong Li Zhuo Li jia-long Fu Xin Guo State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

Almost unlimited reserves and low cost of sodium are accelerating the commercialization of sodiumion ***,serious safety and stability issues,arising mainly from organic liquid electrolytes,hinder further developments of sodium-ion *** electrolytes might be a solution to the safety and stability issues due to the better safety of ***,an overview is provided on recent advances in polymer electrolytes for solid-state sodium batteries,including solid polymer electrolytes,composite polymer electrolytes and gel polymer *** properties,ionic conduction mechanisms and promising applications of polymer electrolytes are discussed,and pending challenges and effective solutions are ***,this review will promote commercial applications of polymer electrolytes in energy storage systems.

关键词： Polymer electrolyte Ionic conductivity Ionic conduction mechanism Sodium-ion battery(SIB) Solidstate battery(SSB)