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Earthquake Research Advances 2024年第1期4卷 36-46页

作者： Xinglin Lei Zhiwei Wang shengli ma Changrong He Geological Survey of Japan AISTTsukuba305-8567Japan State Key Laboratory of Earthquake Dynamics Institute of GeologyCEABeijing100029 China

This study analyzed and summarized in detail the spatial and temporal distributions of earthquakes,tidal responses,focal mechanisms,and stress field characteristics for the M 7.3 Haicheng earthquake sequence in February *** foreshocks are related to the main fault and the conjugate faults surrounding the extension step-over in the *** initiation timing of the foreshock clusters and the original time of the mainshock were clearly modulated by the Earth's tidal force and coincided with the peak of dilational volumetric tidal *** a plausible and testable hypothesis,we proposed a fluid-driven foreshock model,by which all observed seismicity features can be more reasonably interpreted with respect to the results of existing *** with some other known examples,the widely existing step-over along strike-slip faults and associated conjugate faults,especially for extensional ones in the presence of deep fluids,favor the occurrence of short-term *** clustered seismicity with characteristics similar to those of the studied case is not a sufficient and necessary condition for large earthquakes to occur under similar tectonic conditions,it undoubtedly has a warning significance for the criticality of the main *** testing would require quantification of true/false positives/negatives.

关键词： Haicheng earthquake Seismogenic fault ETAS Foreshock Deep fluid

Methanation of syngas over coral reef-like Ni/Al_2O_3 catalysts

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Journal of Natural Gas Chemistry 2011年第4期20卷 435-440页

作者： shengli ma Yisheng Tan Yizhuo Han State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi China Graduate University of Chinese Academy of Sciences Beijing 100039 China

Coral reef-like Ni/Al2O3 catalysts were prepared by co-precipitation of nickel acetate and aluminium nitrate with sodium carbonate aqueous solution in the medium of ethylene *** of syngas was carried out over coral reef-like Ni/Al2O3 catalysts in a continuous flow type fixed-bed *** structure and properties of the fresh and used catalysts were studied by SEM,N2 adsorption-desorption,XRD,H2-TPR,O2-TPO,TG and ICP-AES *** results showed that the coral reef-like Ni/Al2O3 catalysts exhibited better activity than the conventional Ni/Al2O3-H2O *** activities of coral reef-like catalysts were in the order of Ni/Al2O3-673Ni/Al2O3-573Ni/Al2O3- 473Ni/***/Al2O3-673-EG catalyst showed not only good activity and improved stability but also superior resistance to carbon deposition,sintering,and Ni *** the reaction conditions of CO/H2（molar ratio）=1：3,593 K,atmospheric pressure and a GHSV of 2500 h-1,CH4 selectivity was 84.7%,and the CO conversion reached 98.2%.

关键词： methanation syngas coral reef-like Ni/Al2O3 catalysts calcination

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数字政府对制造业绿色技术创新的影响研究

科技创业月刊 2024年第6期37卷 40-46页

作者：邓祥艳马胜利沈阳师范大学管理学院辽宁沈阳110034

选取2017-2021年中国29个省份的面板数据,研究数字政府对制造业绿色技术创新的影响及作用机制。结果表明:①数字政府建设对制造业绿色技术创新具有正向直接影响;②数字政府通过数据嵌入、制度约束、研发补贴等多种效应促进制造业绿色技... 详细信息

选取2017-2021年中国29个省份的面板数据,研究数字政府对制造业绿色技术创新的影响及作用机制。结果表明:①数字政府建设对制造业绿色技术创新具有正向直接影响;②数字政府通过数据嵌入、制度约束、研发补贴等多种效应促进制造业绿色技术创新;③数字政府建设在推动制造业绿色技术创新方面存在区域差异性,对东部地区有显著的积极影响,而在中西部地区的影响力则相对较弱;不同创新类型下数字政府建设对制造业绿色技术创新的推动作用存在差异,数字政府建设有力推动企业策略性绿色技术创新,但对实质性创新行为影响不明显。因此,应针对性地加强不同地区的数字政府建设,聚焦绿色技术创新的政策引领,以充分释放数字政府在促进制造业绿色转型中的潜力。

关键词：数字政府绿色技术创新数据要素制度环境研发补贴

维普期刊数据库博看期刊

宏基因组学应用于口腔念珠菌病诊疗的研究进展

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中国微生态学杂志 2024年第2期36卷 240-244页

作者：胡琬迎李慧佟忠山马晟利佳木斯大学黑龙江佳木斯154000 黑龙江省医院

近年来,随着抗菌药物的不断更新换代,口腔念珠菌病患者逐年增加。口腔念珠菌病患者口腔内的微生物群也趋于多样化,相互作用机制复杂。传统的微生物学研究主要应用分离培养、克隆、荧光原位杂交和分子标记等方法,由于技术的限制仍有约30... 详细信息

近年来,随着抗菌药物的不断更新换代,口腔念珠菌病患者逐年增加。口腔念珠菌病患者口腔内的微生物群也趋于多样化,相互作用机制复杂。传统的微生物学研究主要应用分离培养、克隆、荧光原位杂交和分子标记等方法,由于技术的限制仍有约30%的口腔微生物群无法或难以通过传统方法培养,而宏基因组学技术恰好弥补了这方面的不足,使我们能更深入地探索口腔念珠菌病患者口腔微生物群的多样性、结构和功能。本综述旨在总结、归纳宏基因组学应用于口腔念珠菌病诊疗的研究进展,并阐明其重要意义。

关键词：宏基因组学口腔念珠菌病口腔微生态假丝酵母感染

氮含量对Ti-B-C-N薄膜微观结构和性能的影响

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机械工程材料 2024年第5期48卷 62-66页

作者：陈向阳张瑾马胜利胡海霞安徽理工大学机械工程学院淮南232001 安徽理工大学矿山智能装备与技术重点实验室淮南232001 西安交通大学金属材料强度国家重点实验室西安710049

采用反应磁控溅射法在高速钢基体上制备氮原子分数分别为10.8%,15.6%,28.1%,36.4%的Ti-B-C-N薄膜,研究了氮含量对薄膜微观结构、硬度和摩擦磨损性能的影响。结果表明:Ti-B-C-N薄膜均由α-Fe和Ti(C,N)纳米晶组成,具有Ti(C,N)纳米晶镶嵌... 详细信息

采用反应磁控溅射法在高速钢基体上制备氮原子分数分别为10.8%,15.6%,28.1%,36.4%的Ti-B-C-N薄膜,研究了氮含量对薄膜微观结构、硬度和摩擦磨损性能的影响。结果表明:Ti-B-C-N薄膜均由α-Fe和Ti(C,N)纳米晶组成,具有Ti(C,N)纳米晶镶嵌在非晶基体相中的纳米复合结构;随着氮含量增加,非晶相含量增加,Ti(C,N)纳米晶的含量和晶粒尺寸减小;随着氮含量增加,Ti-B-C-N薄膜的显微硬度增大,摩擦因数和磨损率均减小,表面磨痕变浅,磨损机制由剥落和微观犁削转变为微观抛光。

关键词：反应磁控溅射 Ti-B-C-N薄膜纳米复合结构硬度摩擦磨损性能

Experimental evidence for seismic nucleation phase

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Chinese Science Bulletin 2002年第9期47卷 769-773页

作者： ma shengli ma Jin LIU Liqiang Institute of Geology&Laboratory of Tectonophysics China Seismol-ogical BureauBeijing 100029China

The friction experiments on macroscopically homogeneous and non-homogeneous faults were performed by using a double-shear friction rig, and the waveforms of acoustic emission and the fault slip corresponding to the stick-slip instability events were analyzed. The results indicate that there exist two types of nucleation phase for stick-slip instability of non-homogeneous faults, and one is coincident with the preslip model, the other with the cascade model. It is concluded that the seismic nucleation phase exists objectively, and its generation is related to heterogeneity of fault.

关键词： earthquake nucleation phase friction experiment acoustic emission fault slip.

Microstructure,Mechanical,and Tribological Properties of CN_x Thin Films Prepared by Reactive magnetron Sputtering

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 31-36页

作者： Xiangyang Chen Jin Zhang shengli ma Haixia Hu Zhebo Zhou School of Mechanical Engineering Anhui University of Science and Technology State Key Laboratory for Mechanical Behavior of materials Xi'an Jiaotong University

The microstructure, mechanical, and tribological properties of the carbon nitride （CNx） thin films with different nitrogen contents deposited on high-speed steel substrates by reactive magnetron sputtering were studied. CNx films with nitrogen contents from 10.7 to 28.2 at.% had an amorphous structure composing of the carbon bonds of sp2C-C, sp2C-N, and sp3C-N. The TiN inter-layer cause the adhesion of CNx films enhancement. The more nitrogen concentration led to larger film hardness and friction coefficient against GCrl5 steel balls, but the wear rates decreased.

关键词： Reactive magnetron sputtering (RMS) CNx film Microstructure Tribology

Laboratory acoustic emission study for earthquake generation process

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Earthquake Science 2014年第6期27卷 627-646页

作者： Xinglin Lei shengli ma Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST) State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration

Since the similarity in size distribution of earthquakes and acoustic emissions （AE） was found in the 1960s, many laboratory studies have been motivated by the need to provide tools for the prediction of mining failures and natural earthquakes. This paper aims, on the one hand, to draw an outline of laboratory AE studies in the last 50 years, which have addressed seismological problems. Topics include the power laws in which the similarity between AEs and earthquakes is involved and progress that has been made in AE technology and laboratory AE study. On the other hand, this study will highlight some key issues intensively discussed, especially in the last three decades, such as aspects related to the pre-failure damage evolution, fault nucleation and growth in brittle rocks and discuss factors governing these processes.

关键词： Acoustic emission (AE) Pre-failure damage Rock fracture Earthquake Fault nucleation Process zone

Effects of annealing temperature on the microstructure and hardness of TiAlSiN hard coatings

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Chinese Science Bulletin 2011年第16期56卷 1727-1731页

作者： WANG Xin XU JianHua ma shengli XU KeWei State Key Laboratory for Mechanical Behavior of materials Xi' an Jiaotong University Xi' an 710049 China

TiAlSiN hard coatings were synthesized on high-speed steel using an arc ion enhanced magnetic sputtering hybrid *** microstructure and hardness of the coatings at different annealing temperatures were explored by means of XRD,TEM,EDAX and Vickers *** as-deposited TiAlSiN coatings were confirmed to be amorphous due to high depositing rate and low deposition temperature during the film *** transformation from amorphous to nanocomposites of nano-crystallites and amorphousness were observed after the annealing treatment,the microstructure of TiAlSiN coatings annealed at 800°C and 1000°C were consisted of crystalline hcp-AlN,fcc-TiN and amorphous phase,however,the coatings were only consisted of fcc-TiN and amorphous phase when annealing at 1100°C and 1200°***,the formation of Al2O3 was detected on the coating surface after annealing at 1200°C and it indicated the excellent oxidation resistance of the TiAlSiN coatings under the present experimental ***,the average grain size of the TiAlSiN coatings after high temperature annealing even at 1200°C was less than 30 nm and the size increased with the increasing ***,the hardness of the so-deposited coatings with HV0.2N=3300 dramatically decreased with the increase of temperature and reached nearly to the hardness of TiN coatings with HV0.2N=2300.

关键词：退火温度硬质涂层微观结构硬度 TiN涂层混合动力系统沉积温度纳米复合材料

Advances in experiments and numerical simulations on the effects of stress perturbations on fault slip

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Earthquake Research Advances 2023年第3期3卷 63-71页

作者： Yuanmin Huang shengli ma Xiaohui Li Ye Shao State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing100029China Guangdong Earthquake Agency Guangzhou510070China

Laboratory experiments and numerical simulations on rock friction perturbations,an important means for understanding the mechanism and influencing factors of stress-triggered earthquakes,are of great significance for studying earthquake mechanisms and earthquake hazard *** reviews the experiments and numerical simulations on the effects of stress perturbations on fault slip,and the results show that stress perturbations can change fault stress and trigger *** Coulomb failure criterion can shed light on some questions about stress-triggering earthquakes but cannot explain the time dependence of earthquake triggering nor be used to investigate the effect of heterogeneous stress *** amplitude and period are important factors affecting the correlation between stress perturbation and fault *** effect of the perturbation period on fault instability is still controversial,and the effect of the high-frequency perturbation on earthquakes may be *** and shear stress perturbation can trigger fault instability,but their effects on fault slip *** is necessary to distinguish whether the stress perturbation is dominated by shear or normal stress change when it triggers fault *** tectonic stress plays a decisive effect on the mode of fault instability and earthquake *** emission activity can reflect the changes in fault stress and the progression of fault nucleation,and identify the meta-instability stage and precursor of fault instability,providing a reference for earthquake prediction.

关键词： Coulomb stress change Rate-and state-dependent friction law Stress perturbation parameters Tectonic stress Acoustic emission