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Ab initio molecular dynamics study on the local structures in Ce_(70)Al_(30) and La_(70)Al_(30) metallic glasses

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Chinese Physics B 2018年第5期27卷 405-411页

作者： F X Li j B Kong M Z Li Department of Physics Beijing Key Laboratory of Opto-electronic Functional Materials ＆ Micro-nano Devices Renmin University of China Beijing 100872 China

Ab initio molecular dynamics simulations were performed to investigate the effect of similar elements on the shortto medium-range atomic packing features in Ce70Al30 and La70Al30 glass-forming alloys. 4 f electrons of Ce element in Ce70Al30 alloy were properly treated in electronic calculations. The local atomic structures in both alloys are qualitatively similar. However, the local environments of Al atoms in Ce70Al30 alloy show fluctuation with temperature in the cooling process, which could result from 4 f electrons of Ce elements. Surprisingly, the medium-range atomic packing features of Al atoms in both MGs are quite different, although Ce and La elements are similar. These findings are useful for understanding the enhanced glass-forming ability by similar element substitution in RE-based MGs from a medium-range structure perspective.

关键词： rare earth-based metallic glasses medium-range order molecular dynamics simulation

Preliminary Investigation of Full Model of Two-Mode Scramjet

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作者： j.·布莱克(j. Black)

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journal of Thermal Science 2001年第2期10卷 97-102页

作者： j.L.Le M.A.Goldfeld 等 CentreofAerodynamicsResearchandDevelopmentofChina MianyangSichuan621000China InstituteofTheoreticala

In this paper results of previous researches of two-mode full engine model for Mach number range from 3 to 6 are presented. The main aims of researches are to obtain characteristics of full engine model and its components (the inlet, the combustion chamber and the nozzle) in ramjet and scramjet regimes and to compare these characteristics with the calculation results according to CFD and to approximate (engineering) methods. Tests were carried out without ha supply (cold tests) and with fuel supply (study of ignition and combustion).Hydrocarbon and hydrogen fuel (gaseous or liquid) were used during the tests.

关键词： full engine hypersonic flow fuel inlet combustion wind tunnel experiment.

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High-spin states in neutron-rich ^(102)Mo nucleus

作者： j.·奥斯汀(j. Austen)

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Chinese Physics C 2009年第S1期33卷 199-201页

作者：杨韵颐朱胜江 j. H. Hamilton A. V. Ramayya j. K. Hwang j. O. Rasmussen 丁怀博王建国徐强顾龙 Department of Physics Tsinghua University Department of Physics Vanderbilt University

High-spin states in neutron-rich 102Mo nucleus have been studied by measuring the prompt γ-rays in the spontaneous fission of 252Cf. The previous level scheme has been updated and some new levels and transitions are identified. The one-phonon γ-band is expanded and a band head level of the two-phonon γ- band is proposed. The systematic characteristics of yrast bands, one-phonon γ-bands, two-phonon γ-bands and quasi-particle bands in 102Mo, 104Mo and 106Mo are discussed.

关键词： spontaneous fission neutron-rich nucleus γ-band quasi-particle band

An Empirical Study of Iraq’s Export Function

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An Empirical Study of Iraq’s Export Function

作者： Amar j Ali 南京理工大学

学位级别：硕士

The thesis aims to establish an export function on Iraq’s export trade and provide some political suggestions to economic reconstruction of Iraq. In my study, I try to find out the relationship between the influencing factors and the Iraq’s export trade. The study is limited to the internal and external factors which affect Iraq’s export trade. An initial judgment will be made to identify the major factors. The paper is focus on the relationship between Iraq’s export and these key factors and tries to establish some models to simulate them. Some data tests like unit root test and johansen Cointegration test should be done to determine a relative appropriate model which can reflect the relationship correctly. Vector Autoregressive Model can be used to settle some autoregressive problem in models. After that, I plan to use the determined model to analyze and simulate the relationship between the export performance of Iraq and its influencing factors. The fitting result of determined model will decide the prediction results which will be utilized to explain the development trend of Iraq’s export. At last I hope the suggestions derived from the study can give some assistance to Iraq’s economic reconstruction.

关键词：出口贸易功能协整检验伊拉克自回归模型

DENSITY AND INTEFACIAL TENSION OF NITROGEN-HYDROCARBON SYSTEMS AT ELEVATED PRESSURES

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Chinese journal of Chemical Engineering 1993年第4期1卷 38-46页

作者：汤建华 j.Satherley D.j.Schiffrin Department of Chemistry Liverpool UniversityU.K

The density and interfacial tension of nitrogen-hydrocarbon binary systems were measured at the temperature of40℃ over a wide range of pressures from 0.101 to 40 *** were made on the followinghydrocarbons with nitrogen:n-pentane.n-hexane.n-heptane,n-octane,n-decane and *** madebetween data obtained from these systems and those from the literature at 0.101 MPa and 40℃ show goodagreement and consistency.

关键词： Interfacial tension density hydrocarbon

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芬兰驻新德里大使馆翻新印度新德里

世界建筑导报 2024年第2期39卷 96-99页

作者： juho Grönholm Antti Nousjoki janne Teräsvirta Samuli Woolston Simo Nuojua Harri Ahokas Anders jönsson Lotta Kindberg Mirja Sillanpää Sari Vesanen Tuomas Uusheimo(摄影) ALA建筑师事务所不详

皮耶蒂莱夫妇(Reima and Raili Pietilä)赢得了1963年的芬兰大使馆设计竞赛,该大使馆位于新德里查卡雅布里的外交飞地,参赛作品美而有力,名为“雪在山上说”。经过长时间的拖延,该项目于1980年被正式委托,并在原有概念的基础上重新进行... 详细信息

皮耶蒂莱夫妇(Reima and Raili Pietilä)赢得了1963年的芬兰大使馆设计竞赛,该大使馆位于新德里查卡雅布里的外交飞地,参赛作品美而有力,名为“雪在山上说”。经过长时间的拖延,该项目于1980年被正式委托,并在原有概念的基础上重新进行了设计。大使馆最终于1986年开放,1960年设计的巨大单体屋顶被分成六个独立建筑,围绕在一个中心花园周围。雕塑般的屋顶,这是大使馆最显著的建筑特征,类似于芬兰北部库萨莫附近的雪湖Kitkajärvi。

关键词：中心花园设计竞赛印度新德里芬兰

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湖北省北斗地基增强系统坐标时间序列分析

测绘地理信息 2024年第1期49卷 109-112页

作者：魏以宽邹崇尧陈钧周星宇修延霞邵蕊湖北省测绘工程院湖北武汉430074 吉奥时空信息技术股份有限公司湖北武汉430223 湖北珞珈实验室湖北武汉430079

解算了湖北省北斗地基增强系统的北斗坐标时间序列,并对坐标时间序列性能进行了分析,最后给出北斗和GPS坐标时间序列对比分析方法及案例,从而为省级连续运行基准站快速更新维护提供一种参考方案。

关键词： GNSS 北斗 GPS 时间序列分析大地基准维护