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SIMULATION OF LIQUID ALUMINIUM INFILTrATION IN POrOUS MEDIUM

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 674-681页

作者： H. Yu, Z.x. Lin and Y.H. Zhou 1) Department of Materials Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, China 2) The State Key Laboratory of Solidification Processing, Northwestern Polytechnical University,xi’an 710072, Chin

Based on the principle of infiltration mechanics in porous medium, high reynolds number infiltration of liquid aluminum in porous medium has been investigated. Combined with the test results of hydraulic simulation, the mathematical model of the high reynolds number infiltration of liquid aluminum in porous medium has been established, and it is found that infiltration is characterized by its second order nonlinear. The calculated results based on the model are in good agreement with those of the hydraulic simulation and the aluminum alloy infiltration. The way of high speed infiltration under medium pressure has been put forward to fabricate porous aluminum alloy with thin holes of 0.4mm diameter.

关键词： infiltration simulation porous aluminum alloy

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THE INFLUENCE OF Bi ON THE INTErFACIAL WETTABILITY BETWEEN SiC PArTICLES AND NiCrMo ALLOY CAST IrON

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 705-707页

作者： J.B. Li1) , J.P. Niu1) and x. Wang2) 1) College of Machinery,Shenyang University,Shenyang 110044 ,China2) BenxiIron and Steel Company ,Benxi111800 ,China

The present paper reportsasystematicinvestigation ontheinfluenceof Bielementon thein terfacial wettability of NiCrMo alloy castiron and their related mechanism by means of thesessiledrop method . Thesurfacetension hasbeen calculated and analysised . Thestudyshows thatasmallamountof Bielementcan significantlyimprovethe wettabilitybetween SiCandNiCr Moalloycastiron. Theoptimin Bicontentis0 01 wt% .

关键词： composites SiCparticle NiCrMo alloy castiron wettability

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Meta-Percolation and Metal-Insulator Transition in Two Dimensions

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Meta-Percolation and Metal-Insulator Transition in Two Dimen...

CCAST“强关联物理”研讨会

作者： Junren Shi, Song He, and x. C. xie Department of Physics, Oklahoma State University, Stillwater, OK 74078 Hexaa Laboratory, Warren, NJ 07059

＜正＞According to the scaling theory of localization,all quantum electronic states arelocalized in two-dimensional（2D）*** consequence of the theory is thatthere is no quantum percolation transition in ***,in a real system at afinite temperture,electron phase coherent length is finite and the system is betweenquantum and *** find,in such a 2D system,a metal-iusulator transition（MIT）caused by a novel type of percolation,*** relevance torecently observed 2D MIT is also *** numbers:71.30.+h,***

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relativistic electron flux dropouts in the outer radiation belt associated with corotating interaction regions

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Relativistic electron flux dropouts in the outer radiation b...

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： C.-J.Yuan Q.-G.Zong W.-x.Wan H.Zhang A.-M.Du Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Space Physics and Applied Technology Peking University

Understanding how the relativistic electron fluxes drop out in the outer radiation belt under different conditions is of great *** investigate which mechanisms may affect the dropouts under different solar wind conditions,1.5 – 6.0 Me V electron flux dropout events associated with 223 corotating interaction regions(CIrs) from 1994 to 2003 are studied using the observations of Solar,Anomalous,Magnetospheric Particle Explorer *** to the superposed epoch analysis,it is found that high solar wind dynamic pressure with the peak median value of about 7 n Pa is corresponding to the dropout of the median of the radiation belt content(rBC) index to 20% of the level before stream interface arrival,whereas low dynamic pressure with the peak median value of about 3 n Pa is related to the dropout of the median of rBC index to 40% of the level before stream interface ***,the influences of russell-Mc Pherron effect with respect to interplanetary magnetic field orientation on dropouts are *** is pointed out that under positive russell-Mc Pherron effect(+rM effect) condition,the median of rBC index can drop to 23% of the level before stream interface arrival,while for negative russell-Mc Pherron effect(-rM effect) events,the median of rBC index only drops to 37% of the level before stream interface *** the evolution of phase space density profiles,the effect of +rM on dropouts can be through nonadiabatic loss.

关键词： It is common that CIrs are associated with electron flux dropouts It is suggested that high dynamic pressure leads to stronger dropout than low dynamic pressure Positive rM effect seems to result in more intense dropout than negative rM effect

Experimental Study on Flows around Two rotating Circular Cylinders in Side-by-Side Arrangement at Moderate reynolds Number

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Experimental Study on Flows around Two Rotating Circular Cyl...

第六届国际流体力学会议

作者： C.x.Tu,J.Z.Lin,F.B.Bao Institute of Fluid Simulation and Measurement,China Jiliang University,Hangzhou 310018,China

The flow characteristics of two rotating side-by-side circular cylinders are investigated experimentally with particle image velocimetry(PIV) and Hot-wire anemometer in this *** reynolds number,re,is 950 and the non-dimensional center distances,T /D,are 1.11 and 1.6,respectively,where T and D are the center distance between the two cylinders and the cylinder *** velocity ratio,|α|,ranges from 0 to 2,where |α| is the circumferential speed at the cylinder surface normalized by the free stream *** rotational directions are *** experimental results show that the first rotation is optimal for weakening the near-wake *** the vorticities and turbulence diminish significantly and the time-averaged velocity field is homogenized with increasing |α|.The second rotation enlarges the vorticity *** the third type of rotational direction the time-averaged velocity loss deflects from the free stream with the increase of |α|.Meanwhile,the wake vorticity and turbulence with turbulivity higher than 20% both shift downwards,with the intensity of turbulence and vorticity unchanged.

关键词： rotating side-by-side circular cylinders vorticity field turbulence experiment study

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高压气体热容

四川大学学报(自然科学版) 1959年第2期 47-57页

作者： M.x.卡拉别奇扬茨 ,田安民

近几十年来,由于高压应用于各种不同科学和技术部门的缘故,所以就很需要高压下各种物质性质的数据,这就要求首先要研究高压气体的性质,而热容则是其中之一,在近代科学工作中对热容作了相当多的研究（例如见[1—6]）。要在高压下测定气... 详细信息

近几十年来,由于高压应用于各种不同科学和技术部门的缘故,所以就很需要高压下各种物质性质的数据,这就要求首先要研究高压气体的性质,而热容则是其中之一,在近代科学工作中对热容作了相当多的研究（例如见[1—6]）。要在高压下测定气体的热容是一个相当复杂的任务。因为测定手续麻烦,要求很多实验装置和长时间的实验观察。且一般的说来测量的准确度还不高（特别在临界区,此时CD的值很大）。

关键词：方程式方程气体热容文献值实验数据

内蒙古林西县及邻区晚二叠世生物礁和环境意义

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中国科学：地球科学 2016年第7期46卷 963-975页

作者：田树刚张永生宫月萱李子舜高联达翟大兴朱常伟中国地质科学院地质研究所北京100037 中国地质科学院矿产资源研究所北京100037 中国地质科学院科技处北京100037

在内蒙林西县及邻区首次观察到大量晚二叠世台缘礁和丘状礁.初步研究证实,兴-蒙地区当时为开放海槽环境.本文首先分析林西官地林西组四、五段沉积相和相序叠置,再造晚二叠世晚期林西-九台裂陷带的稳定沉降-缓慢抬升-迅速闭合过程;并且... 详细信息

在内蒙林西县及邻区首次观察到大量晚二叠世台缘礁和丘状礁.初步研究证实,兴-蒙地区当时为开放海槽环境.本文首先分析林西官地林西组四、五段沉积相和相序叠置,再造晚二叠世晚期林西-九台裂陷带的稳定沉降-缓慢抬升-迅速闭合过程;并且利用多门类化石的属种延续和丰度分布,确定含生物礁地层的地质时代和划分对比,为生物礁研究奠定基础.然后详细研究多类造礁生物,即海绵、苔藓虫和钙藻等的形态功能和造礁机制,恢复各门类的生态条件和造礁环境,划分出6个造礁生物组合.综合沉积相、地层和生物古生态研究成果,识别出晚二叠世晚期2类陆棚边缘,即丘状礁缓坡陆棚边缘和障壁礁陡坡陆棚边缘.从而论证生物礁的线状分布标志中朝板块北缘及兴蒙-海槽内林西-九台裂陷带在晚二叠世末期闭合.

关键词：生物礁造礁环境古生态晚二叠世内蒙古

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Local Coalescence Effect on Extraction Column Performance

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Local Coalescence Effect on Extraction Column Performance

International Solvent Extraction Conference 2005

作者： x.J. Tang G.S. Luo* J.D. Wang (State Key Laboratory of Chemical Engineering Tsinghua University Beijing 100084 China)

The structural serviceability of large road tunnel

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The structural serviceability of large road tunnel

作者： Y.Yuan,T.Liu & x.Liu Key Laboratory of Geotechnical & Underground Engineering,Ministry of Education, Tongji University,Shanghai,P.r.China Department of Geotechnical Engineering,School of Civil Engineering, Tongji University,Shanghai,P.r.China

Because there is still lack of a method for the evaluation of tunnel structures,this paper discussed the general method in taking assessment and made a scheme of assessment for tunnel *** approaches for evaluating the stability and reliability of tunnel structures are *** tasks of the implementation of tunnel inspection are grouped and aim is to provide data for safety and serviceability evaluation of tunnel structure.A tunnel in soft ground is given as a case for practical application *** assessment analyzed results of tunnel structural safety and residual service-life.

关键词： Tunnel The structural serviceability of large road tunnel