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Propagating subduction initiation of the Caroline Plate at the Mussau Trench

Science China Earth Sciences 2025年第1期68卷 253-269页

作者： Chun-Feng li Yongkang DENG Tao WU Dongdong DONG Guoliang ZHANG Jiazheng ZHANG Yutao liU yaqing li Fugui TANG Lulu ZHANG Department of Marine Sciences Zhejiang University Laboratory of Marine Mineral Resources Laoshan Laboratory Key Lab of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Key Lab of Ocean and Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Science & Technology on Integrated Information System Lab Institute of Software Chinese Academy of Sciences

New seismic imaging from the Mussau Trench confirms that, under horizontal compression on an oceanic plate boundary, it is within the young and weak oceanic plate that a trench will develop, and it is the young plate, not so long after its birth, that starts to subduct toward the old plate. The Mesozoic Pacific Plate cannot easily bend, under the joint horizontal compression and vertical gravity pull, even with a pre-existing weak zone in place and with a large age offset across the plate boundary. The bending of the Caroline Plate near the northern end of the Mussau Trench started only after a long-time span of trench migration, and/or after a prolonged transition from initial compression to trench development. Highly contrasting trench deformation and sedimentary accretion between two parallel seismic sections support an evident migration of underthrusting or significant longitudinal heterogeneity along the trench. The swift transition from underthrusting to non-thrusting can be explained by a counter-clockwise rotation of the Caroline Plate. That miniature accretionary wedges develop even before the subduction initiates imply strong compression and uplifting before the underthrusting can kick-start. Rotation of the Caroline Plate have been halted as the Mussau Trench is seismically rather quiet and the Lyra Trough to the east shows relaxational extension.

关键词： Mussau Trench Subduction initiation Seismic reflection Caroline Plate

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A phylogeny of the Passerida(Aves: Passeriformes)based on mitochondrial 12S ribosomal RNA gene

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Chinese Birds 2015年第1期6卷 22-29页

作者： lina Wu Yanfeng Sun Juyong li yaqing li Yuefeng Wu Dongming li Key Laboratory of Animal Physiology Biochemistry and Molecular Biology of Hebei Province College of Life Science Hebei Normal University Department of Biology and Chemistry Xingtai University Ocean College of Hebei Agricultural University Shijiazhuang Academy of Agriculture and Forestry Science

Background: Passerida is the largest avian radiation within the order Passeriformes. Current understanding of the high-level relationships within Passerida is based on DNA–DNA hybridizations; however, the phylogenetic relationships within this assemblage have been the subject of many ***: We analyzed the 12 S ribosomal RNA gene from 49 species of Passerida, representing 14 currently recognized families, to outline the phylogenetic relationships within this ***: Our results identified the monophyly of the three superfamilies in Passerida: Sylvioidea, Muscicapoidea and Passeroidea. However, current delimitation of some species is at variance with our phylogeny estimate. First, the Parus major, which had been placed as a distinct clade sister to Sylvioidea was identified as a member of the super family;second, the genus Regulus was united with the Sturnidae and nested in the Muscicapoidea clade instead of being a clade of ***: Our results were consistent with Johansson's study of the three superfamilies except for the al ocation of two families, Paridae and Regulidae.

关键词： Phylogeny Passerida Mitochondrial 12S ribosomal RNA gene

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Controlling dispersion and morphology of MoS2 nanospheres by hydrothermal method using SiO2 as template

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Chinese Journal of Chemical Engineering 2018年第5期26卷 1229-1234页

作者： Zhenwei Zhang Peng Wang Fei Wang yaqing li Wei Lu Xingmao Jiang Xia Gui Zhi Yun College of Chemical Engineering Nanjing Tech University Nanjing 210009 China College of Mathematics Science and Chemical Engineering Changzhou Institute of Technology Changzhou 213022 China Department of Chemical Engineering Changzhou University Changzhou 213016 China Hubei Key Lab of Novel Reactor & Green Chemical Technology Key Laboratory for Green Chemical Process of Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology China

Monodispersed MoS_2 nanospheres were successfully synthesized by using SiO_2 as hard template. The size and morphology of the MoS_2 nanospheres could be finely controlled by the content of SiO_2 and sulfur precursors. Furthermore, higher surface area of monodispersed MoS_2 nanospheres exhibited high reaction rate for hydrodesulfurization(HDS) of dibenzenethiophene(DBT).

关键词： Molybdenum disulfide Hard template Monodisperse Hydrodesulfufization

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Drag of a D-shaped bluff body under small amplitude harmonic actuation

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Theoretical & Applied Mechanics Letters 2015年第1期5卷 35-38页

作者： yaqing li Honglei Bai Nan Gao School of Aeronautics and Astronautics Dalian University of Technology Department of Mechanical Engineering University of Melbourne State Key Laboratory of Aerodynamics

Open-loop flow control method was used to affect the development of a turbulent wake behind a D-shaped bluff body. Loud speakers were embedded inside the bluff body to produce two zero-net-mass- flux jets through 2 mm-wide span-wise slots located along the upper and lower edges on the rear wall. The drag forces for different actuation amplitudes （Cμ, the ratio between the momentum of the actuating jets and the moment deficit caused by the bluff body） and frequencies （StA） were examined. The effects of the phase difference in the two jets （0 and π） were also studied. It was found that when Cμ was 0.1%, a drag reduction up to 5% was achieved when the velocities of the two jets varied in phase at a frequency of 5tA = 0.16. When the velocities of the two jets varied π out of phase, significant drag increase was observed.

关键词： D-shaped bluff bodyOpen-loop flow controlSynthetic jet

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Application of the fractal theory for evaluating effects of coal comminution by waterjet

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International Journal of Coal Science & Technology 2014年第4期1卷 450-455页

作者： yaqing li Greg Galecki Gul Akar Sezai Sen Yutao Zhang Key Lab of Mining and Disaster Prevention and Control in Western Mine Ministry of EducationXi’an710054China School of Energy Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China Department of Mining and Nuclear Engineering Missouri University of Science and TechnologyRollaMO 65401USA Department of Mining Engineering Dokuz Eylul UniversityIzmirTurkey

Comminution of coal to ultrafine sizes by high-pressure waterjet provides a novel method for preparation of coal-water fuels for next generation,near-zero emission electric power *** particle size distribution(PSD)of ground coal is a key parameter in the preparation of slurries as it determines the settling behavior of the particles and viscosity of the coal-water *** are several methods available for representation and evaluation of particle size analysis ***,fractal theory provides a means by which the entire PSD of comminuted materials can be quantified by using of a specific and exact *** this paper,a volume-based fractal model was deduced to characterize the PSD of the coal which is ground in a specially designed comminution *** the size reduction process,the inlet pressures up to 276 MPa were used.

关键词： Coal comminution Fractal theory Particle size distribution Waterjet

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Effects of pyrite on the spontaneous combustion of coal

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International Journal of Coal Science & Technology 2015年第4期2卷 306-311页

作者： Jun Deng Xiaofeng Ma Yutao Zhang yaqing li Wenwen Zhu Xi'an University of Science & Technology Xi'an 710054China Ministry of Education's Key Lab of Mining and DisasterPrevention and Control in Western Mine Xi'an 710054China Department of Safety and Quality Management InnerMongolia Yitai Coal Co. Ltd.Ordos 017000 Inner Mongolia China

Abstract Pyrite has a significant effect on the spontaneous combustion of coal. The presence of pyrite can change the propensity of coal towards spontaneous combustion. The influences of various pyrite contents on the parameters of spontaneous combustion, such as index gases, temperature and released heat etc., were investigated in this study, Coal samples with different pyrite contents （0 %, 3 %, 5 %, 7 % and 9 %） were made by mixing coal and pyrite. The oxidation experiments under temperature-programmed condition were carried out to test the release rate of gaseous oxidation products at different temperatures. Differential scanning calorimeter （DSC） was employed to measure the intensity of heat release during coal oxidation for various pyrite contents. The results indicate that pyrite can nonlinearly accelerate the process of spontaneous combustion. The coal sample with a pyrite content of 5 % has the largest CO release rate and oxygen adsorption as well. However, the coal sample with a pyrite content of ？ % has the largest rate of heat flow according to the results from the DSC tests. Pyrite contents of 5 %-7 % in coal has the most significant effects on spontaneous combustion within the range of this study. The conclusions are conducive to the evaluation and control for the spontaneous combustion of coal.

关键词： Pyrite Coal spontaneous combustion Index gases Oxidation

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A　PROPERTY　OF　PRODUCTS　OF　NEW　GENERAliZED　FUNCTIONS

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Systems Science and Mathematical Sciences 1996年第2期9卷 171-174页

作者： li yaqing(Institute of Systems Science, Academia Sinica, Beijing 100080, China) 中科院系统科学所北京

ＡＰＲＯＰＥＲＴＹＯＦＰＲＯＤＵＣＴＳＯＦＮＥＷＧＥＮＥＲＡＬＩＺＥＤＦＵＮＣＴＩＯＮＳＬＩＹａｑｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，... 详细信息

ＡＰＲＯＰＥＲＴＹＯＦＰＲＯＤＵＣＴＳＯＦＮＥＷＧＥＮＥＲＡＬＩＺＥＤＦＵＮＣＴＩＯＮＳＬＩＹａｑｉｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，Ｃｈｉｎａ）ＡＰＲＯＰＥＲＴＹＯＦ...

关键词： Product new generalized function distribution.

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Carbon Segregation of Bearing Steel Concasting Billet

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Journal of Materials Science & Technology 2000年第3期16卷 273-276页

作者： Deguang ZHOU, Jie FU and Ping WANG (University of Science and Technology Beijing, Beijing 100083, China) Junhao XU, yaqing XIE and Zheng li (Daye Special Steel Co. Ltd, Huangshi 435001, China) University of Science and Technology Beijing Beijing 100083 China Daye Special Steel Co. Ltd Huangshi 435001 China

The formation mechanism of 'white band' and central carbon segregation of high-carbon Cr bearing steel concasting billets are discussed in this paper. The maximum oxygen content in the steel produced by concasting process was 13xl0^-6 with an average oxygen content of 9.3xl0^-6. Comparison of metallurgical quality and fatigue property between the concasting steel (CC) and ingot casting steel (IC) showed that the carbon segregation (C/C0) in former steel was 0.92～1.10 and its fatigue life was equal to that of the latter steel.

关键词： Carbon Segregation of Bearing Steel Concasting Billet

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Cloning and Diversity Analysis of TaHKT2;2 in Hexaploid Wheat

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Agricultural Biotechnology 2018年第4期7卷 16-20,54页

作者： Mengjun li yaqing li Shichang ZHANG Nan ZHANG Zhanliang SHI Shijiazhuang Academy of Agriculture and Forestry Sciences/Wheat Engineering Research Center of Hebei Province Shijiazhuang 050041China

In order to study the roles of members of HKT gene fanfily in wheat, TaHKT2 ; 2 was isolated by using homologous cloning strategy and screening genomic BAC library. TaHKT2; 2 genes were mapped on chromosomes 7A, 7B and 7D, named as TaHKT2; 2-7A, TaHKT2; 2-7B, and TaHKT2; 2-7D, respectively. TaHKT2 ; 2 and TaHKT2 ; 1 had the same genetic structure, composed of three exons and two introns, and formed a cluster with TaHKT2 ; 1 on the phylogenetic tree of plant HKT transporters. The coding sequences of TaHKT2 ; 2-7A, TaHKT2 ; 2-7B, and TaHKT2 ; 2-7D were 1 602, 1 602 and 1 596 bp long, respectively, but TaHKT2 ;2-7D cDNA sequence was not isolated by RT-PCR in eight wheat varieties. The natural diversity of TaHKT2 ;2 genes was analyzed by cloning and sequencing from 12 wheat varieties. The results showed that TaHKT2;2-7A was found to be more diverse than TaHKT2; 2-7B and TaHKT2; 2-7D. Only a few bases changed in the alleles of TaHKT2 ; 2 genes in wheat. No amino-acid natural variation lay in the P-loops of deduced protein sequences of all alleles of TaHKT2 ; 2 in 12 wheat varieties. The identity of coding sequences was nmch higher than that of 5＇ flanking regions of TaHKT2 ; 2 genes. TaHKT2 ; 2 nfight be selected over the comse of wheat domestication and belonged to domestication gene.

关键词： Hexaploid wheat HKT gene family TaHKT2 2 BAC library Diversity

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Induction of matrix metalloproteinase-9 in alveolar macrophages by TNF-α through NF-κB signal pathway

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Journal of Nanjing Medical University 2006年第1期20卷 41-47页

作者： yaqing li Zhenxiang Zhang Yongjian Xu Wang Ni Shixin Chen Department of Respiratory Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

Objective： To explore the effect of tumor necrosis factor （TNF）-α on matrix metalloproteinase-9 （MMP-9） expression and activity in alveolar macrophages （AM） from patients with chronic obstructive pulmonary disease （COPD） and study its associated signal pathway. Methods： AM were collected from bronchoalveolar lavage fluid in patients with COPD. The AM were incubated for 1.5 h with pyrrolidine dithiocarbamate（PDTC） at concentrations from 0 μmol/L to 50μmol/L and then stimulated for 24 h by TNF-α at 10 ng/ml. MMP-9 expression and activity were respectively detected by semi-quantitative reverse transcription-polymerase chain reaction （RT-PCR）, Western blotting and Zymography. NF-κB activity was investigated by electrophoretic mobility shift assay （EMSA）. Results： Both the mRNA and protein levels of MMP-9 induced by TNF-α in AM were significantly elevated in a dose dependent manner （ P 〈 0.05）. The level of MMP-9 activity was also correspondingly significantly elevated in the induction （ P 〈 0.05）, which was possibly related with the over-expression of MMP-9. NF-κB activity was significantly increased when AM were stimulated by 10 ng/mL TNF-α （ P 〈 0.05）. The expression of MMP-9 induced by TNF-α could be significantly inhibited by PDTC （P 〈 0.05 ）. Conclusion： The expression and activity of MMP-9 from AM could be induced by TNF-α, and NF-κB signal pathway played an important role in the induction.

关键词： chronic obstructive pulmonary disease alveolar macrophage matrix metalloproteinase nuclear factor-κB

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