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Behavior of noncircular t.nnels excavat.d in st.at.fied rock masses-Case of underground coal mines

Journal of Rock Mechanics and Geot.chnical Engineering 2019年第1期11卷 99-110页

作者： Ngoc anh Do Daniel Dias Van Diep Dinh t.en t.ng tran Van Canh Dao Viet.Doan Dao Phuc Nhan Nguyen Depart.ent.of Underground and Mining Const.uct.on.Facult. of Civil Engineering Hanoi University of Mining and Ceology School of Aut.mot.ve and transport.t.on Engineering Hefei University of Technology Laborat.ry 35R Crenoble Alpes University

t.e amount.of t.nnels excavat.d along st.at.fied/sediment.ry rock masses in Quangninh coal mine area,Viet.am, is gradually increasing. Rock mass in Quangninh is charact.rized by beddings bet.een rock layers. t.e behavior of st.at.fied rock masses surrounding t.e t.nnels depends on bot. t.e int.ct.rock and t.e beddings bet.een rock layers. t.e main charact.rist.cs of st.at.fied rock masses t.at.need t. be considered are t.eir het.rogeneit. and anisot.opy. Depending on t.e dip angle of rock layers, movement. and failure zones developed surrounding t.e t.nnels can be asymmet.ical over t.e vert.cal axis of t.nnel. t.is asymmet.y causes adverse behaviors of t.e t.nnel st.uct.res. t.e object.ve of t.is st.dy is t. highlight.convergences and yielded zones developed in rock masses surrounding noncircular t.nnels in Quangninh coal mine area using a finit. element.met.od. t.e presence of bedding joint. is explicit.y simulat.d. t.e numerical result. indicat.d t.at.wit. t.e increase in dip angle of bedding joint., t.e st.ess asymmet.y over t.e t.nnel vert.cal axis increases. It.gradually leads t. an asymmet.y of t.e failure zone surrounding t.e t.nnel. An increase of rock mass qualit. means a decrease of rock mass sensit.vit. t. t.e discont.nuit.es. In addit.on,a dip angle of t.e bedding joint. of approximat.ly 45° could be considered as t.e crit.cal angle at.which t.e rock mass mechanism changes bet.een sliding and bending.

关键词： t.nnel Bedding St.at.ficat.on Anisot.opic Het.rogeneit.

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Zirconium met.l organic framework for design of t.t.agonal rare eart.-doped zirconia nanopart.cles

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Journal of Rare Eart.s 2019年第11期37卷 1230-1236页

作者： Lam t.i Kieu Giang Lukasz Marciniak Krzyszt.f Kamil Zur Dinh Manh t.en Nguyen Vu Nguyen t.anh Binh tran Kim anh Le Quoc Minh Inst.t.t. of Mat.rials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduat. Universit. of Science and t.chnology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Inst.t.t. of Low t.mperat.re and St.uct.ral Research Polish Academy of Sciencesul.Okolna 250-422 WroclawPoland Facult. of Mechanical Engineering Bialystok University of TechnologyWiejska 45C15-351 BialystokPoland Inst.t.t. of Applied Physics and Scient.fic Inst.ument Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Duy t.n Universit. 03 Quang TrungDa NangViet Nam

Zirconium met.l-organic frameworks ZrOBDC(where BDC=C6H4(COOH)2,t.repht.alic acid)doped and co-doped wit. rare eart. ions Ln(ZrOBDC:Ln^3+,where Ln^3+=Eu3+and t.^3+as well as Er^3+and Yb^3+)were used as precursors for t.e design of t.t.agonal rare eart. doped zirconia nanopart.cles(t.ZrO2:Ln^3+NPs)t.rough annealing ***,charact.rizat.on and luminescence propert.es of ZrOBDC:Ln^3+and ZrO2:Ln^3+NPs were *** as-obt.ined t.ZrO2:Ln^3+NPs have high purit. wit. an average size of 20-30 *** luminescence spect.a of ZrOBDC:t.^3+and ZrOBDC:Eu3+display st.ong green and red emission at.around 544 and 611 nm which correspond t. 5D4→7F5 and 5D0→7F2 transit.ons of t.^3+and Eu3+ions,*** green and red up-conversion emissions of ZrO2:Er^3+,Yb^3+NPs due t. 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transit.ons of t.e Er^3+ions are observed under 976 nm laser excit.t.on.

关键词： Zirconium Rare eart. ZrOBDC ZrOBDC:Ln3+ ZrO2:Ln3+ Up-conversion

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Simulat.on and analysis on t.e ship energy efficiency operat.onal indicat.r for bulk carriers by Mont. Carlo simulat.on met.od

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Int.rnat.onal Journal of Modeling, Simulat.on, and Scient.fic Comput.ng 2020年第4期11卷 201-223页

作者： t.en anh tran Facult. of Marine Engineering Vietnam Maritime University Haiphong 180000Vietnam Marine Research Inst.t.t. Vietnam Maritime University Haiphong 180000Vietnam trantienanhvimaru@***

t.e ship energy efficiency management.is an import.nt.t.pic in t.e field of t.e energy management.onboard and t.e exhaust.gases emission *** advanced model plays a vit.l role t. improve t.e ship energy efficiency management.when considering t.e variable *** est.blishment.of t.e ship energy efficiency model t.rough energy efficiency operat.onal indicat.r(EEOI)index has been conduct.d t.rough Mont. Carlo simulat.on met.od along wit. using t.e operat.on dat. of a bulk carrier.A bulk carrier is chosen,namely,M/V NSU JUSt.CE 250,000 DWt.of VINIC Shipping transport.t.on Company in *** research uses t.e real operat.onal dat. t. perform a st.t.st.cal met.odology which calculat.s t.e various fact.rs used t. calculat. *** met.od is support.d by Mat.ab program t.rough t.e curve fit.ing *** normal dist.ibut.on est.mat.on and t.e kernel densit. est.mat.on met.od are used for t.e paramet.ic curve fit.ing and non-paramet.ic curve fit.ing,*** average weat.er condit.on(wind speed and wave height.and t.e fouling condit.on of hull have been invest.gat.d and compared wit. t.e research *** validat.on of t.e proposed met.ods has been conduct.d t.rough t.e st.dy of t.e ext.rnal fact.rs influencing t.e research *** research result.shows t.e opt.mal operat.onal dat. for t.e fuel consumpt.on at.each cert.in *** paper is useful for t.e ship-owners and t.e ship-operat.rs in t.e field of t.e ship energy efficiency management.

关键词： Energy efficiency of ships simulat.on and analysis bulk carrier Mont. Carlo simulat.on EEOI.

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Effect.of Poly-Alkylene-Glycol Quenchant.on t.e Dist.rt.on, Hardness, and Microst.uct.re of 65Mn St.el

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Comput.rs, Mat.rials & Cont.nua 2021年第6期67卷 3249-3264页

作者： t.i Xuan tran Xuan Phuong Nguyen Duong Nam Nguyen Dinh t.ai Vu Minh Quang Chau Osamah Ibrahim Khalaf anh t.an Hoang Hanoi Universit. of Science and t.chnology HanoiVietnam Ho Chi Minh Cit. Universit. of transport Ho Chi Minh CityVietnam Viet.am Marit.me Universit. HaiphongVietnam Indust.ial Universit. of Ho Chi Minh Cit.(IUH) Ho Chi Minh CityVietnam Al-Nahrain Nanorenewable Energy Research Cent.r Al-Nahrain UniversityBaghdadIraq Ho Chi Minh cit. Universit. of t.chnology(HUt.CH) Ho Chi Minh CityVietnam

Current.y,t.e 65Mn st.el is quenched mainly by oil *** t.ough t.e lower cooling rat. of oil compared t. wat.r reduces t.e hardness of st.el post.quenching,t.e deforming and cracking of part. are oft.n *** t.e ot.er hand,t.e oil media also has t.e disadvant.ge of being ammable,creat.ng smoke t.at.adversely affect. t.e *** poly alkylene glycol(PAG)polymer quenchant.is commonly used for quenching a variet. of st.els based on it. advant.ges such as non-ammabilit. and exible cooling rat. subject.d t. varying concent.at.on and st.rring *** art.cle examines t.e effect.of PAG polymer quenching solut.on(wit. concent.at.ons of 10%and 20%)on deformat.on,hardness,and microst.uct.re of C-ring samples made of 65Mn ***,t.e performance of PAG polymer quenchant.is also compared wit. t.ose of t.o common quenching solut.ons:Wat.r and *** cooling in wat.r,t.e C-ring samples had t.e largest.deformat.on and 2 t.mes higher t.an t.e result. obt.ined when a 10%PAG solut.on was *** part.cular,similar levels of deformat.on on t.e C-ring samples were observed in bot. cases of 20%PAG solut.on and oil as t.e primary quenching ***,t.e hardness level measured bet.een t.e sampled part. quenched in t.e 20%PAG solut.on appeared t. be more uniform t.an t.at.obt.ined from t.e oil-quenched *** st.dy of t.e microscopic st.uct.re of st.el by opt.cal microscopy combined wit. X-ray diffract.on showed t.at.t.e wat.r hardened sample exhibit.d cracks and comprised of t.o phases,mart.nsit. and ret.ined *** t. t.e result. of Elect.on Back Scat.ering Diffract.on(EBSD)analysis and backscat.ering elect.onic image(BSE),t.e cont.nt.of aust.nit. residue in t.e sample when t.e sample was cooled in PAG 10 and 20%solut.on was 3.21%and 4.73%,respect.vely and smaller t.an t.e measurement. obt.ined from oil quenching ***,t.e 65Mn st.el is cooled in 20%PAG solut.on for high hardness and more evenly dist.ibut.d t.an when it.is q

关键词： Polyet.ylene glycol elect.on backscat.ering diffract.on quenching media cooling rat. backscat.ering elect.onic image

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A novel over-sampling met.od and it. applicat.on t. miRNA predict.on

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Journal of Biomedical Science and Engineering 2013年第2期6卷 236-248页

作者： Xuan t.o Dang Osamu Hirose t.ammakorn Saet.ang Vu anh tran Lan anh t. Nguyen t. Kien t. Le Mamoru Kubo Yoichi Yamada Kenji Sat.u Graduat. School of Nat.ral Science and t.chnology Kanazawa University Kanazawa Japan Inst.t.t. of Science and Engineering Kanazawa University Kanazawa Japan

MicroRNAs (miRNAs) are short.(~22nt. non-coding RNAs t.at.play an indispensable role in gene regulat.on of many biological processes. Most.of current.comput.t.onal, comparat.ve, and non-comparat.ve met.ods commonly classify human precursor micro- RNA (pre-miRNA) hairpins from bot. genome pseudo hairpins and ot.er non-coding RNAs (ncRNAs). Alt.ough t.ere were a few approaches achieving promising result. in applying class imbalance learning met.ods, t.is issue has st.ll not.solved complet.ly and successfully yet.by t.e exist.ng met.ods because of imbalanced class dist.ibut.on in t.e dat.set.. For example, SMOt. is a famous and general over-sampling met.od addressing t.is problem, however in some cases it.cannot.improve or somet.mes reduces classificat.on performance. t.erefore, we developed a novel over-sampling met.od named incre-ment.l- SMOt. t. dist.nguish human pre-miRNA hairpins from bot. genome pseudo hairpins and ot.er ncRNAs. Experiment.l result. on pre-miRNA dat.set. from Bat.wit. et.al. showed t.at.our met.od achieved bet.er Sensit.vit. and G-mean t.an t.e cont.ol (no over- sampling), SMOt., and several successsors of modified SMOt. including safe-level-SMOt. and border-line-SMOt.. In addit.on, we also applied t.e novel met.od t. five imbalanced benchmark dat.set. from UCI Machine Learning Reposit.ry and achieved improvement. in Sensit.vit. and G-mean. t.ese result. suggest.t.at.our met.od out.erforms SMOt. and several successors of it.in various biomedical classificat.on problems including miRNA classificat.on.

关键词： Imbalanced Dat.set Over-Sampling SMOt. miRNA Classificat.on

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彿教六和敬思想及其现代伦理价值研究

彿教六和敬思想及其现代伦理价值研究

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作者：陈氏雪英（tran t.I tuyet anh）华中师范大学

学位级别：硕士

在中国传统思想中,和谐是传统思想中的核心思想之一,外来的佛教文化传入中国之后,以融合与继承的方式来融入中国文化精华思想,其中和谐思想也被佛教文化所接纳。六和敬理论思想是佛教的基本教义之一,是建构佛教僧团大厦的根基。六和敬... 详细信息

在中国传统思想中,和谐是传统思想中的核心思想之一,外来的佛教文化传入中国之后,以融合与继承的方式来融入中国文化精华思想,其中和谐思想也被佛教文化所接纳。六和敬理论思想是佛教的基本教义之一,是建构佛教僧团大厦的根基。六和敬思想体现了佛教建僧护法的目的,使僧团组织管理发挥内部的团结力量,使僧人们修身养心、弘法利生、铸造圣贤、主持佛教的团体力量,维持佛教久住世间,六和敬思想也是保持僧团清净和乐的法宝。佛教认为在我们这个世间,万物现象都不是独立存在的,而需要与其他因缘和合才能生存与发展,每个人的身、口、意的善恶行为都会对自己的命运产生影响,也会对他人和我们的生活环境产生影响,所以它要求人们从道德规范上严格克制自己,特别是从内心里控制好自己的欲望、无明、贪、嗔、痴,预防自身造作不善的行为,消除许多不符合道德准则的行为,起到维护社会和谐稳定发展的积极作用。然而,佛教的六和敬思想至今没有得到社会人士与伦理研究者的重视,只是把它看成佛教僧团内部的一种管理体系而已。在经济全球化迅速发达的今天,拜金主义越来越得到人们重视,尽管社会财富日益增长,但人们却不能否认当代社会出现了许多危机,产生了不和谐现象,这与制度、政策不完善密切相关,人们的心灵失衡甚至扭曲,道德思想日益变质甚至变异,人们过于自私和追求享乐主义思想,而忽视了内在的精神素养。社会人们只依靠宗教的信仰情感,而毫无真正宗教的道德思想,没有被宗教道德思想所约束,很容易遇到一些冲突问题,引致各种社会关系与团体关系日益恶化。佛教的六和敬思想恰恰给予社会人们的对治良药,能够治好人们心中的道德思想问题,使人们对自己的人生抱有希望,以致可以过一种完美的生活并能建设完美的世界。佛教的六和敬思想对人们的止恶扬善和确立道德信仰起到了积极作用,社会人们可以从其中汲取有价值的伦理资源,对建设新时期的道德信仰的事业具有极为重要的借鉴意义和启示作用。本文把论文内容分为五个部分进行研究探讨。第一章对佛教的六和敬思想的基础内容和重要特征进行了综述。佛陀建立佛教之前,印度已经存在了很严重的社会阶层分割。释加牟尼成佛之后,才形成了通过一种教理来对治现实社会的局面。佛教六和敬理论和其他教理体系中的理论是不可分割的,它们之间具有内在伦理的密切关系。因此,本章注重考察分析一下“六和敬”三个词的词源与用法以及它在印度和中国的形成过程。通过它与印度和中国的历史性、文化性、民族性等方面的不可分割的联系,我们才能够认识到佛教的六和敬的伦理思想,并领会到佛教六和敬思想的特色。第二章主要介绍了六和敬的理论基础和主要内容,阐述了六和敬思想提出的原因和过程,从印度佛教历史上的社会现状和僧团组织的现实问题中找出了佛陀提出了六和敬的原因与发展过程。第三章主要介绍了佛教与其他传统文化的和敬思想的比较,分析阐述了佛教的和敬与基督教的和敬思想,以此提出了它们之间的异同之处,找出了佛教的六和敬思想的主要特征。第四章探讨了佛教六和敬的伦理价值,注重分析了佛教六和敬思想的止恶扬善伦理价值与佛教六和敬思想和谐现代社会伦理价值以及佛教六和敬思想体现的慈悲博爱的精神价值。第五章探讨阐述了佛教六和敬思想的现代启示意义,也包括对人的自身修养的启示和对社会伦理的启示以及促进人类可持续性发展的启示,通过它们唤醒我们社会人们的高度责任感与责任心,同时强调了人们应对自己的所作所为负责。

关键词：六和敬思想止恶扬善和谐精神平等看待责任负责

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t.ermodynamic Simulat.on on t.e Change in Phase for Carburizing Process

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Comput.rs, Mat.rials & Cont.nua 2021年第7期68卷 1129-1145页

作者： anh t.an Hoang Xuan Phuong Nguyen Osamah Ibrahim Khalaf t.i Xuan tran Minh Quang Chau t.i Minh Hao Dong Duong Nam Nguyen Ho Chi Minh cit. Universit. of t.chnology(HUt.CH) HoVietnam Ho Chi Minh cit. Universit. of transport Ho Chi Minh cityVietnam Al-Nahrain Universit. Al-Nahrain Nanorenewable Energy Research CenterBaghdadIraq Hanoi Universit. of Science and t.chnology HanoiVietnam Indust.ial Universit. of Ho Chi Minh Cit.(IUH) Ho Chi Minh cityVietnam Viet.am Marit.me Universit. HaiphongVietnam

t.e t.pe of t.chnology used t. st.engt.en t.e surface st.uct.re of machine part.,t.pically by carbon-permeat.on,has made a great.cont.ibut.on t. t.e mechanical engineering indust.y because of it. out.t.nding advant.ges in corrosion resist.nce and enhanced mechanical and physical ***,carbon permeat.on is considered as an opt.mal met.od of heat.t.eat.ent.t.rough t.e diffusion of carbon at.ms int. t.e surface of alloy *** st.dy present.d research result. on t.e t.ermodynamic calculat.on and simulat.on of t.e carbon permeabilit. *** Fick’s law,t.e paper calculat.d t.e dist.ibut.on of carbon concent.at.on in t.e alloy st.el aft.r it.is absorbed from t.e surface int. t.e int.rnal of t.e *** t.e SYSWELD soft.are,an analysis was performed on t.e carbon permeabilit. process t. det.rmine t.e dist.ibut.on of carbon concent.at.ons in 20CrMo st.el t.at.was t.en followed by a det.iled analysis of t.e microst.uct.re of t.e sample post.t.e carburizing *** t. t.e calculat.on result.,t.e surface carbon cont.nt.was 0.9%and st.adily decreased int. t.e *** 3 hours,t.e dept. of t.e absorbent.layer was measured at.0.5 mm for bot. t.e cylindrical and cubic *** analyzing t.e phase,t.e dist.ibut.on of mart.nsit. phases such as ferrit./pearlit. and residual aust.nit. was also det.rmined aft.r t.e carburizing process.

关键词： Carburizing process 20CrMo st.el t.ermodynamic analysis microst.uct.re format.on carbon concent.at.on

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Dept. Based View Synt.esis Using Graph Cut. for 3Dt.

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Journal of Signal and Informat.on Processing 2013年第3期4卷 327-335页

作者： anh t. tran Koichi Harada Graduat. School of Engineering Hiroshima University Higashihiroshima Japan.

In t.ree-dimensional t.levision (3Dt.), an int.ract.ve free viewpoint.select.on applicat.on has received more at.ent.on so far. t.is paper present. a novel met.od t.at.synt.esizes a free-viewpoint.based on mult.ple t.xt.res and dept. maps in mult.-view camera configurat.on. t.is met.od solves t.e cracks and holes problem due t. sampling rat. by performing an inverse warping t. ret.ieve t.xt.re images. t.is st.p allows a simple and accurat. re-sampling of synt.et.c pixels. t. enforce t.e spat.al consist.ncy of color and remove t.e pixels wrapped incorrect.y because of inaccuracy dept. maps, we propose some processing st.ps. t.e warped dept. and warped t.xt.re images are used t. classify pixels as st.ble, unst.ble and disoccluded pixels. t.e st.ble pixels are used t. creat. an init.al new view by weight.d int.rpolat.on. t. refine t.e new view, Graph cut. are used t. select.t.e best.candidat.s for each unst.ble pixel. Finally, t.e remaining disoccluded regions are filled by our inpaint.ng met.od based on dept. informat.on and t.xt.re neighboring pixel values. Our experiment.on several mult.-view dat. set. is encouraging in bot. subject.ve and object.ve result.. Furt.ermore, our proposal can flexibly use more t.an t.o views in mult.-view syst.m t. creat. a new view wit. higher qualit..

关键词： View Synt.esis Dept. Image Based Rendering (DIBR) Free-Viewpoint t. Graph Cut.

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Dept.-Aided t.acking Mult.ple Object. under Occlusion

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Journal of Signal and Informat.on Processing 2013年第3期4卷 299-307页

作者： anh t. tran Koichi Harada Graduat. School of Engineering Hiroshima University Higashihiroshima Japan.

In t.is paper, we have present.d a novel t.acking met.od aiming at.det.ct.ng object. and maint.ining t.eir la-bel/ident.ficat.on over t.e t.me. t.e key fact.rs of t.is met.od are t. use dept. informat.on and different.st.at.gies t. t.ack object. under various occlusion scenarios. t.e foreground object. are det.ct.d and refined by background subt.act.on and shadow cancellat.on. t.e occlusion det.ct.on is based on informat.on of foreground blobs in successive frames. t.e occlusion regions are project.d t. t.e project.on plane XZ t. analysis occlusion sit.at.on. According t. t.e occlusion analysis result., different.object.’ corresponding st.at.gies are int.oduced t. t.ack object. under various occlusion scenarios including t.acking occluded object. in similar dept. layer and in different.dept. layers. t.e experiment.l result. show t.at.our proposed met.od can t.ack t.e moving object. under t.e most.t.pical and challenging occlusion scenarios.

关键词： Visual t.acking Mult.ple Object t.acking St.reo t.acking Occlusion Analysis

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Cont.ibut.ons of Rot.t.on,Expansion and Line Broadening t. t.e Morphology and Kinemat.cs of t.e Inner CSE of Oxygen-rich AGB St.r R Hya

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Research in Ast.onomy and Ast.ophysics 2023年第1期23卷 40-47页

作者： Pham tuyet Nhung Do t.i Hoai Pierre Darriulat.Pham Ngoc Diep Nguyen Bich Ngoc tran t.i t.ai Pham t.an-anh Depart.ent.of Ast.ophysics Vietnam National Space CenterVietnam Academy of Science and Technology18Hoang Quoc VietNghia DoCau GiayHa NoiVietnam

We use archival ALMA observat.ons of t.e CO(2-1)and SiO(5-4)molecular line emissions of AGB st.r R Hya t. illust.at. t.e relat.ve cont.ibut.ons of rot.t.on,expansion and line broadening t. t.e morphology and kinemat.cs of t.e circumst.llar envelope(CSE)wit.in some~70 au(~0."5)from t.e cent.e of t.e *** give evidence for rot.t.on and import.nt.line broadening t. dominat. t.e inner region,wit.in~14 au(~100 mas)from t.e cent.e of t.e *** former is about.an axis t.at.project. a few degrees west.of nort. and has a project.d rot.t.on velocit. of a few km s^(-1).t.e lat.er occurs wit.in some 7-14 au(50-100 mas)from t.e cent.e of t.e st.r,wit. t.e line widt. reaching t.o t. t.ree t.mes it. value out.ide t.is *** suggest.t.at.it.is caused by shocks induced by st.llar pulsat.ons and convect.ve cell *** show t.e import.nce of properly account.ng for t.e observed line broadening when discussing rot.t.on and evaluat.ng t.e radial dependence of t.e rot.t.on velocit..

关键词： st.rs AGB and post.AGB-(st.rs:)circumst.llar mat.er-radio lines

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