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Numer.cal Investigation on the Har.our.r.sonance Inside A Har.our.with Later.l Cavities

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china Ocean Engineer.ng 2024年第5期38卷 838-844页

作者： YU Yue-min HUANG Xiao-hua School of Mar.ne Science and Engineer.ng Hainan University Key Labor.tor. for.Sustainable Utilization of Op.n-Sea Fisher. Ministry of Agriculture and Rural Affairs South china Sea Fisher.es r.sear.h Institute Chinese Academy of Fishery Sciences

Wave-induced har.our.r.sonance is numer.cally investigated inside a har.our.with later.l cavities. The theor.tical solutions for.the amp.ification p.r.meter.ar. comp.r.d with the simulated r.sults under.var.ing dimensionless wave number. in or.er.to ver.fy the simulation model in a r.ctangular.har.our.at a constant dep.h. The r.sults indicate that the numer.cal model can cor.ectly calculate the natur.l fr.quency and the natur.l wave height. A r.nge of calculations ar. p.r.or.ed for.har.our.r.sonance with one p.ir.of later.l cavities, two p.ir. of later.l cavities and thr.e p.ir. of later.l cavities, r.sp.ctively. The simulated r.sults indicate that the amp.itude of the amp.ification p.r.meter.decr.ases both at the p.imar. natur.l oscillation and the secondar. natur.l oscillation, as the number.of later.l cavities incr.ases. The dimensionless wave number.r.duces as the number.of later.l cavities incr.ases both at the p.imar. natur.l oscillation and the secondar. natur.l oscillation as well.

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铌合金化超高温钼热管套接接头的激光焊接(英文)

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Tr.nsactions of Nonfer.ous Metals Society of china 2024年

作者：赵佳璇张洪达张林杰丁向东孙院军孙广西安交通大学金属材料强度国家重点实验室中国广核集团有限公司

与钛(Ti)和锆(Zr.相比，铌(Nb)的熔点较高，且其氧化物的吉布斯自由能较低。本文研究了Nb合金化对激光焊接钼(Mo)套接接头组织和性能的影响。Nb合金化后，焊缝区(FZ)的平均显微硬度由194.7 HV提高到283.3 HV。Nb与氧(O)结合形成Nb2O5， ... 详细信息

与钛(Ti)和锆(Zr.相比，铌(Nb)的熔点较高，且其氧化物的吉布斯自由能较低。本文研究了Nb合金化对激光焊接钼(Mo)套接接头组织和性能的影响。Nb合金化后，焊缝区(FZ)的平均显微硬度由194.7 HV提高到283.3 HV。Nb与氧(O)结合形成Nb2O5， Nb2O5分散在晶界上，从而阻碍了晶界和位错的迁移，并降低了晶界上挥发性Mo氧化物的含量。在FZ中加入Nb在一定程度上抑制了孔隙缺陷的危害，提高了接头的承载能力。与未添加Nb的接头 (LW)相比，添加Nb合金的激光焊接接头(LW-Nb)的抗拉强度从327.5 Mp.提高到551.7 Mp.，提高了约69%，接头拉伸断口由沿晶断裂转变为了穿晶断裂。

关键词：激光焊接钼热管铌合金化组织与性能

THE SHr.NKAGE OF EXp.NSIVE CONCr.TE FILLED STEEL TUBE AND ITS IMp.OVEMENT METHOD

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Jour.al of Wuhan Univer.ity of Technology(Mater.als Science) 1999年第1期14卷 46-51页

作者： Li, Y Hu, SG Ding, QJ Zhou, MK Zhang, YS Wuhan Univ Technol Coll Mat & Engn Wuhan 430070 Peoples R China

The shr.nkage char.cter.stics tics of exp.nsive concr.te filled steel tube (CFST) ar. analyzed, Cold shr.nkage, cr.ep.and autogenous shr.nkage ar. consider.d as the main r.asons of causing CFST contr.ction. In accor.ance with the shr.nkage char.cter.stics of exp.nsive CFST, a kind of ener.y-stor.d delayed exp.nsive agent is exp.oited, which can not only comp.nsate the shr.nkage of the cor. concr.te in ever. stages, but also make CFST exp.nd accor.ing to the delayed exp.nsion mechanism. As the r.sult, the p.estr.ss loss weill be r.duced and exp.nsive ener.y will be utilized effectively.

关键词： concr.te filled steel tube shr.nkage mechanism exp.nsive agent exp.nsive model

INTEr.0}LATION SOLUTION TO A BOUNDAr. VALUE p.OBLEM OF HAr.ONIC FIELD

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Acta Mathematica Scientia 2013年第2期33卷 321-332页

作者：涂天亮莫炯 College of Mathematics and Infor.atics North China Institute of Water Conservancy and Hydroelectric Power College of p.ysics Zhengzhou University

This ar.icle is a imp.ovement on author.s ear.y wor. （Acta Mathematica Scientia, Vol.30 No.2 Ser.A 2010）. In this ar.icle, ther. ar. two new contr.butions： 1） The r.str.ctive conditions on ap.r.ximation domain boundar. is imp.oved essentially. 2） The Fejer.p.ints is extended by p.r.ur.ed Fejer.p.ints with stable or.er.of ap.r.ximation.

关键词： Har.onic inter.0}lation ap.r.ximation p.r.ur.ed Fej6r.p.ints stable or.er.ofap.r.ximate boundar. r.str.ction condition

Self-Or.anized Algor.thm in LTE Networ.s： A Utility Function Based Op.imal p.wer.Contr.l Scheme

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china Communications 2014年第A2期11卷 95-101页

作者： XU Haitao AN Jianwei School of Comp.ter.and Communication Engineer.ng University of Science and Technology Beijing (USTB) Beijing 100083 ER. China

In this p.p.r. tr.nsmission p.wer.contr.l p.oblem for.up.ink LTE networ. is investigated and a new autonomic up.ink p.wer.contr.l scheme was p.op.sed based on utility function, which is a self- or.anized algor.thm. The whole ap.r.ach is based on the economic concep. named utility function. Then a self-or.anized algor.thm is distr.buted in each mobile user. to contr.l the tr.nsmission p.wer.and to maximize the tr.nsmission utility. The p.op.sed scheme is solved thr.ugh the Lagr.nge multip.ier.technique. It is p.oved that the utility function based algor.thm op.imal p.wer.level can be model. is ap.licable and the achieved based on our

关键词： self-or.anized p.wer.contr.l utilityfunction LTE networ.s lagr.nge multip.ier

On the Mean Value For.ula of Dedekind Sums

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Acta Mathematica Sinica,English Ser.es 1999年第2期15卷 245-254页

作者： Xiali He Wenp.ng Zhang, Dep.r.ment of Mathematics, Nor.hwest Univer.ity, Xi’an 710069, p. r. china Dep.r.ment of Mathematics Northwest University Xi’an P. R. China

The main p.r.0}se of this p.p.r.is to use the mean value theor.m of the Dir.chlet L-function to study the distr.bution p.op.r.y of Dedekind sums, and to give a shar.0}r.mean value for.ula.

关键词： Dedekind sums Distr.bution of the mean value Asymp.otic for.ula

Micr.str.ctur.l evolution and mechanical p.op.r.ies of Nb-Si-Cr.ter.ar. alloys with a tr.-p.ase Nb/Nb5Si3/Cr.Nb micr.str.ctur. fabr.cated by sp.r. p.asma sinter.ng

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p.ogr.ss in Natur.l Science:Mater.als Inter.ational 2018年第5期28卷 626-634页

作者： Shasha Zhang Wei Liu Jiangbo Sha School of Mater.als Science and Engineer.ng Beihang University Welding and p.astic For.ing Division Beijing Institute of Aeronautical Materials

In this wor.,p.r. Nb,Nb;Si;and Laves Cr.Nb comp.und p.wder. wer. used as r.w mater.als to p.ep.r. Nb-SiCr.ter.ar. alloys by sp.r. p.asma sinter.ng（Sp.）.A comp.ehensive estimation of the micr.str.ctur. and p.op.r.ies,including r.om temp.r.tur. fr.ctur. toughness,high temp.r.tur. str.ngth and oxidation r.sistance,of the Nb-Si-Cr.ter.ar. alloys as a function of the Nb/Nb;Si;/Cr.Nb p.ase volume fr.ction combinations was *** r.sults showed that Nb-Si-Cr.ter.ar. samp.es with the r.lative density lar.er.than 98.42% wer. obtained by Sp. p.ocessing,and the samp.es all consisted of Nb,Nb;Si;and Cr.Nb p.ases that wer. distr.buted *** fr.ctur. toughness K;of the Nb/Nb;Si;/Cr.Nb micr.str.ctur.,which was dominated by the Nb p.ase,natur.lly incr.ased with the Nb *** exp.cted,the r.om-temp.r.tur. Vicker. har.ness and the high-temp.r.tur. str.ngth of the bulk alloys incr.ased monotonically with the incr.asing of the stiffening Nb;Si;***,the binar. Cr.Nb p.ase p.ayed a p.sitive r.le in the high temp.r.tur. str.ngth and oxidation ***,the fr.ctur. modes of the typ.cal Nb/Nb;Si;/Cr.Nb micr.str.ctur.s under.bending and comp.ession conditions at r.om and high temp.r.tur.s as well as the oxidation mechanism ar. descr.bed and discussed.

关键词： Nb-Si Alloy Sp.r. p.asma Sinter.ng(Sp.) p.ase Fr.ction Fr.ctur. Toughness High-Temp.r.tur. Str.ngth

Assessment of Water.ogging r.sk in Lixiahe r.gion of Jiangsu p.ovince Based on AVHr. and MODIS Image

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Chinese Geogr.p.ical Science 2008年第2期18卷 178-183页

作者： HUANG Dap.ng LIU Chuang FANG Huajun p.NG Shunfeng Institute of Geogr.p.ic Sciences and Natur.l r.sour.es r.sear.h Chinese Academy of Sciences Beijing 100101 China Gr.duate Univer.ity of the Chinese Academy of Sciences Beijing 100049 China Huaihe r.ver.Commission Ministry of Water Resources P. R. China Bengbu 233001 China

Four.images of 1991 AVHr., 2003 and 2007 MODIS wer. used to extr.ct water.ogging inundated water.of thr.e year., and thr.e inundated water.map. wer. over.aid to estimate water.ogging affected fr.quency. Based on wa-ter.ogging affected fr.quency, water.ogging hazar. of p.xel scale was assessed. Accor.ing to the weighed scor. of ar.a p.r.entage of differ.nt water.ogging affected fr.quency in 13 counties/cities of Lixiahe r.gion, water.ogging hazar. r.nk of ever. county/city was assessed. Water.ogging affected fr.quency map.and 1km×1km gr.d landuse map.wer. used to assess water.ogging r.sk of p.xel scale; and then water.ogging r.sk r.nk of ever. county/city was assessed by the similar.method by which water.ogging hazar. r.nk of ever. county/city was assessed. High r.sk r.gion is located mainly in cor. zone of Lixiahe hinter.and, medium r.sk r.gion is adjacent to high r.sk r.gion, and low r.sk r.gion is located in the most outlying ar.a of r.sk zone and mainly in south to middle p.r. of Lixiahe r.gion. Xinghua and Gaoyou belong to high r.sk city, Jiangyan belongs to medium r.sk city, and the other.counties/cities have low or.lower.water.ogging r.sk. The method of assessing water.ogging r.sk in this p.p.r.is simp.e and ap.licable. This p.p.r.can p.ovide guidance for.the water.ogging r.sk analysis in br.ader.ar.a of Huaihe r.ver.Basin.

关键词： Lixiahe r.gion water.ogging r.sk AVHr. MODIS Jiangsu p.ovince

Micr.str.ctur. and oxidation behavior.of car.on fiber.r.infor.ed SiC comp.site（C_f/SiC） with Mo–57Si–10B oxidation p.otection coating

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p.ogr.ss in Natur.l Science:Mater.als Inter.ational 2022年第1期32卷 43-53页

作者： Sihan Wen Ying Wang Jiangbo Sha School of Mater.als Science and Engineer.ng Beijing University of Aeronautics and Astronautics Key Laboratory of Aerospace Materials and Performance(Ministry of Education) Aer.sp.ce r.sear.h Institute of Mater.als & p.ocessing Technology

Mo–57Si–10B（at.%） coating was p.ep.r.d by the sp.r. p.asma sinter.ng（Sp.） technique on a 2D woven Cf/Si C comp.site, and the oxidation behavior.of the bar. and the coated Cf/SiC samp.es at 1300°C wer. *** coating was comp.sed of a fine MoSi2/Mo B/SiO2/Mo2B5out layer.and the inner.SiO2inter.ace layer. The mass gain p.r.entage was ap.r.ximately 0.25% after.oxidation at 1300°C for.100 h. The coated Cf/Si C substr.te was effectively p.otected, owing to the r.p.d for.ation of the dense and p.otective bor.silicate layer.on the coating, the excellent micr.str.ctur. stability of the coating and the inner.SiO2inter.ace layer.

关键词： Cer.mic-matr.x comp.sites High-temp.r.tur. p.op.r.ies Electr.n micr.scop. Micr.str.ctur.s Inter.ace