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Volcanism in the Solar System

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Science China Earth Sciences 2023年第11期66卷 2419-2440页

作者： Long XIAO jun HUANG Zhiyong XIAO chao qi Yuqi qiAN School of Earth Sciences China University of GeosciencesWuhan 430074China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Volcanic activity is the main process for heat-material exchange and circulation for differentiated planets. All terrestrial planets in the Solar System, the Moon, the satellites of giant planets, and the dwarf planets once experienced or are currently experiencing volcanic activities. This paper summarized the volcanism(main volcanic features and their formation) on the Moon, Mars, Venus, and Mercury in the inner Solar System, volcanism and cryovolcanism on satellites(Io, Europa,Enceladus) of giant planets, as well as volcanism on dwarf planets including Cere in the main asteroid belt and Pluto in the Kuiper belt. This work shows volcanism in the Solar System is driven by various factors, forming abundant volcanic *** has significant meanings to compare volcanism happening on different planets using comparative planetology approaches for a better understanding of volcanism, the planetary habitability, and the information contained on the origin and evolution of planets in the Solar System.

关键词： Volcanism Terrestrial planets Planetary evolution Solar System

In-depth analysis of the fatigue mechanism induced by inclusions for high-strength bearing steels

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International Journal of Minerals,Metallurgy and Materials 2021年第5期28卷 826-834页

作者： chao Gu Wen-qi Liu jun-he Lian Yan-ping Bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering Aalto UniversityPuumiehenkuja 302150 EspooFinland

A numerical study of stress distribution and fatigue behavior in terms of the effect of voids adjacent to inclusions was conducted with finite element modeling simulations under different *** mechanisms were also analyzed *** results showed that the effects of inclusions on fatigue life will distinctly decrease if the mechanical properties are close to those of the steel *** the inclusions,which are tightly bonded with the steel matrix,when the Young’s modulus is larger than that of the steel matrix,the stress will concentrate inside the inclusion;otherwise,the stress will concentrate in the steel *** voids exist on the interface between inclusions and the steel matrix,their effects on the fatigue process differ with their positions relative to the *** void on one side of an inclusion perpendicular to the fatigue loading direction will aggravate the effect of inclusions on fatigue behavior and lead to a sharp stress *** void on the top of inclusion along the fatigue loading direction will accelerate the debonding between the inclusion and steel matrix.

关键词： inclusion high-strength bearing steel fatigue numerical study stress distribution

Stress Study on CrN Thin Films with Different Thicknesses on Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2018年第3期31卷 329-336页

作者： Di Fan Hao Lei chao-qian Guo Dong-Li qi jun Gong chao Sun Institute of Metal Research Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China School of Science Shenyang Ligong UniversityShenyang 110159China

The reliability of a substrate curvature-based stress measurement method for CrN thin films on substrate with fluctuant surface was *** stress error led by the ignorance of substrate thermal deformation was *** showed that this error could be as large as several hundred MPa under general deposition *** in the CrN thin films with different thicknesses ranging from 110 to 330 nm on stainless steel was studied by this method,in comparison with conventional results on silicon *** thin films＇ morphology and structure were investigated and related to the film stress.A significant result of the comparison is that stress evolution in the thin films on steel obviously differs from that on silicon wafer,not only because the two substrates have different coefficients of thermal expansion,which provokes thermal stress,but also the considerable discrepancy in the thin films＇ grain coarsening rate and structure that induce different intrinsic stresses.

关键词： Stress CrN film Magnetron sputtering Stoney equation Steel substrate

Quantifying the Tension between Cosmological Models and JWST Red Candidate Massive Galaxies

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Research in Astronomy and Astrophysics 2024年第4期24卷 1-6页

作者： jun-chao Wang Zhi-qi Huang Lu Huang Jianqi Liu School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai519082China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China

We develop a Python tool to estimate the tail distribution of the number of dark matter halos beyond a mass threshold and in a given volume in a *** code is based on the extended Press-Schechter model and is computationally efficient,typically taking a few seconds on a personal laptop for a given set of cosmological *** high efficiency of the code allows a quick estimation of the tension between cosmological models and the red candidate massive galaxies released by the James Webb Space Telescope,as well as scanning the theory space with the Markov Chain Monte Carlo *** an example application,we use the tool to study the cosmological implication of the candidate galaxies presented in Labbéet *** standard Λcold dark matter(ΛCDM)model is well consistent with the data if the star formation efficiency can reach~0.3 at high *** a low star formation efficiency ε~0.1,theΛCDM model is disfavored at~2σ-3σconfidence level.

关键词： (cosmology:)cosmological parameters Galaxy:abundances Galaxy:formation

Mechanical,Microstructural and Tribological Properties of Reactive Magnetron Sputtered Cr-Mo-N Films

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Journal of Materials Science & Technology 2015年第1期31卷 55-64页

作者： Dongli qi Hao Lei Tiegang Wang Zhiliang Pei jun Gong chao Sun Surface Engineering of Materials Division Institute of Metal ResearchChinese Academy of Sciences

The Cr-Mo-N films were deposited on high speed steel（HSS） substrates by a DC reactive magnetron sputtering equipment coupled with two horizontal magnetron *** effects of substrate negative bias voltage（Vb）,substrate temperature（Ts） and gas flow ratio（R= N2/（N2+ Ar）） on the microstructure,morphology,as well as the mechanical and tribological properties of the Cr-Mo-N films were investigated by virtue of X-ray diffraction（XRD） analysis,X-ray photoelectron spectroscopy（XPS）,field emission scanning electron microscopy（FESEM）,atomic force microscopy（AFM）,nano-indentation test,ball-on-disk tribometer,and Rockwell indenter et *** increasing Vbto-100 V,the preferred orientation of the films changed from（111） to（200） and their mechanical and tribological properties were improved gradually,*** was also found that Tsgave a significant effect on mechanical property *** the Tsreached 300 ℃,the film obtained the highest hardness and effective elastic modulus of approximately 30.1 and 420.5 GPa,respectively and its critical load increased to about 54 *** increasing R,the phase transformation from body-centered-cubic（bcc） Cr and hexagonal CrMoNxmultiphase to single face-centered-cubic（fcc） solid solution phase was *** correlations between values of hardness（H）,effective elastic modulus（E*）,HIE*,H3/E*2,elastic recovery（1/14） and tribological properties of the films were also *** results showed that the elastic recovery played an important role in the tribological behavior.

关键词： Cr-Mo-N films DC magnetron sputtering Hardness Cri

Rational design of copper-based single-atom alloy catalysts for electrochemical CO_(2)reduction

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Nano Research 2022年第8期15卷 7116-7123页

作者： Jian-chao Jiang jun-Chi Chen Meng-die Zhao qi Yu Yang-Gang Wang jun Li School of Materials Science and Engineering and Shaanxi Laboratory of CatalysisShaanxi University of TechnologyHanzhong 723001China Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China

Electrochemical CO_(2)-reduction reaction(CO_(2)RR)is a promising way to alleviate energy crisis and excessive carbon *** Cu-based electrocatalysts have been considered for CO_(2)RR to generate hydrocarbons and ***,the application of Cu electrocatalysts has been restricted by a high onset potential for CO_(2)RR and low *** this study,we have designed a series of Cu-based single-atom alloy catalysts(SAAs),denoted as TM1/Cu(111),by doping isolated 3dtransition metal(TM)atom onto the Cu(111)*** theoretically evaluated their stability and investigated the activity and selectivity toward CO_(2)*** to the pure Cu catalyst,the majority TM1/Cu(111)catalysts are more favorable for hydrogenating CO_(2)and can efficiently avoid the hydrogen-evolution reaction due to the strong binding of carbonaceous *** on the density functional theory calculations,instead of the HCOOH or CO products,the initial hydrogenation of CO_(2)on SAAs would form the*CO intermediate,which could be further hydrogenated to produce *** addition,we have identified the bond angle of adsorbed*CO_(2)can describe the CO_(2)activation ability of TM1/Cu(111)and the binding energy of*OH can describe the CO_(2)RR activity of TM1/Cu(111).We speculated that the V/Cu(111)can show the best activity and selectivity for CO_(2)RR among all the 3d-TM-doped TM1/Cu(111).This work could provide a rational guide to the design of new type of single-atom catalysts for efficient CO_(2)RR.

关键词： CO_(2)electrochemical reduction Cu single-atom alloy catalysts density functional theory

Integrating lipidomics and gut microbiota to study the anti-hyperlipidemia effect of Sargentodoxae Caulis extract

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Traditional Medicine Research 2025年第1期10卷 1-11页

作者： Xiao-Xiao Zhang Li Jia Xiu-jun Zhan Charity Ngina qing-Rui Zhang Xiao-Ge Li qi-Bao Jiang Shi Bai Miao-Miao Jiang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China School of Medicine Taizhou UniversityTaizhou 318000China.

Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&*** in ***,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical ***,the anti-hyperlipidemia effect of SC is not fully *** paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating ***:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut ***,we explored the potential mechanism of SC in treating hyperlipidemia by pathway ***:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to *** to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s *** also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically ***-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the *** was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and *** treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,*** these,14 common differenti

关键词： hyperlipidemia Sargentodoxae Caulis lipidomics intestinal flora

Multi-characteristics Based Data Scheduling Over the Smart Grid

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International Journal of Automation and computing 2016年第2期13卷 151-158页

作者： Dong-Feng Fang Zhou Su qi-chao Xu Ze-jun Xu School of Mechatronic Engineering and Automation Shanghai University

In this paper, we propose multi-characteristics based data scheduling over smart grid. Three different pricing strategies are presented based on user priority and load rate. Then the corresponding novel scheduling algorithms are introduced by the proposed data priority and pricing strategies. The simulation experiments are carried out to evaluate the proposed algorithms based on trace data. And the results show that our methods can outperform the conventional method.

关键词： Scheduling multi-characteristics pricing data priority smart Grid

Intelligent service function chain mapping framework for cloud-and-edge-collaborative IoT

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The Journal of China Universities of Posts and Telecommunications 2022年第3期29卷 54-68,104页

作者： Yang chao Li Yimin Li Tong Xu Siya qi jun Zhang Yu Information and Communication Branch State Grid Liaoning Electric Power Co.Ltd.Shenyang 110004China State Key Laboratory of Networking and Switching Technology Beijing University of Postsand TelecommunicationsBeijing 100876China State Grid Liaoning Electric Power Research Institute Shenyang 110004China

With the rapid development of Internet of thing(IoT) technology, it has become a challenge to deal with the increasing number and diverse requirements of IoT services. By combining burgeoning network function virtualization(NFV) technology with cloud computing and mobile edge computing(MEC), an NFV-enabled cloud-and-edge-collaborative IoT(CECIoT) architecture can efficiently provide flexible service for IoT traffic in the form of a service function chain(SFC) by jointly utilizing edge and cloud resources. In this promising architecture, a difficult issue is how to balance the consumption of resource and energy in SFC mapping. To overcome this challenge, an intelligent energy-and-resource-balanced SFC mapping scheme is designed in this paper. It takes the comprehensive deployment consumption as the optimization goal, and applies a deep Q-learning(DQL)-based SFC mapping(DQLBM) algorithm as well as an energy-based topology adjustment(EBTA) strategy to make efficient use of the limited network resources, while satisfying the delay requirement of users. Simulation results show that the proposed scheme can decrease service delay, as well as energy and resource consumption.

关键词： Internet of thing(IoT) mobile edge computing network function virtualization(NFV) deep Q-learning(DQL)

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