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诊断前CT提示胰腺癌的征象

国际医学放射学杂志 2009年第6期 604-605页

作者： s.s.Ahn M.j.Kim j.Y.Choi j.s.Lim 郭若汨 Department of Radiology Severance HospitalYonsei University College of MedicineSeodaemun-guShinchon-dong 134Seoul120-752South Korea

对16例完成全部诊断性CT检查后诊断为胰腺癌病人的20次诊断前CT检查进行分析。由3位放射科医生独立对16例诊断前CT及对照组50例次诊断前CT检查资料进行分析,包括38例胰腺无异常者,12例无钙化的慢性胰腺炎。分析观察包括胆管或胰管扩张、胰

关键词：胰腺癌病人远端低密度征象胰管扩张 CT

CRYsTALLOGRAPHY OF TERNARY OXIDEs IN THE sYsTEM Ba-Ti-Zn-O

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CRYSTALLOGRAPHY OF TERNARY OXIDES IN THE SYSTEM Ba-Ti-Zn-O

sixteenth Congress of the International Union of Crystallography

作者： W.Wong-Ng R.s.Roth C.j.Rawn Ceramics Division NISTGaithersburgMD 20899U.S.A.

In recent years,the ternary system BaO-ZnO- TiO is of great interest in the production of microwave dielectric *** addition of ZnO to the barium polytitanates has been found to improve their dielectric property. Knowledge of crystallography of phases in the Ba-Zn-Ti-0 system is important to understand the physical properties of these materials.

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Laser-MIG arc hybrid brazing-fusion welding of Aluminum alloy to Galvanized steel with different filler metal

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Laser-MIG arc hybrid brazing-fusion welding of Aluminum allo...

The 2nd International symposium on Computer-Aided Welding Engineering

作者： s.j. Wang G.L. Qin Y.H. su Key Laboratory for Liquid-solid structure Evolution and Processing of Materials Ministry of Education Shandong University

Aluminum alloy plate were jointed to galvanized steel sheets with lap joint by laser-MIG hybrid brazing-fusion welding with Alsi5, Alsi12, AlMg5 filler wires, and the influences of si and Mg on the microstructure characteristics and mechanical properties of the brazed-fusion welded joint were studied. The increase of si element in the fusion weld, it can make the grain refinement, and increase the microhardness of the fusion weld. Therefore, the microhardness value in the seam made with Alsi12 filler wire is 98.4 HV 10 , which is higher than 96.8 HV 10 that made with Alsi5 filler wire and 70.4 HV 10 that made with AlMg5 filler wire. The highest tensile strength can reach 178.9 MPa made with AlMg5 filler wire. The tensile strength is 172.43 MPa made with Alsi5 filler wire. However, the lowest tensile strength is 144 MPa made with Alsi12 filler wire. The average thickness of the intermetallic compound （IMC） layer with Alsi5, Alsi12, AlMg5 filler wires is 1.49-2.64ìm, which is less than the limited value of 10ìm. The IMC layer made with Alsi5, Alsi12 filler wires are identified as FeAl2 , Fe2Al5 , Fe4Al13 and Al 0.5 Fe3si0.5 . However, the IMC layer made with AlMg5 filler wire are identified as FeAl2, Fe2Al5 and Fe4Al13 .

关键词： Hybrid welding Aluminum Galvanized steel Mechanical properties Intermetallic compound

A meta-analysis of 1-year outcomes of transcatheter versus surgical aortic valve replacement in low-risk patients with severe aortic stenosis

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journal of Geriatric Cardiology 2020年第1期17卷 43-50,I0008-I0010页

作者： Aaqib H Malik syed Zaid Hasan Ahmad joshua Goldberg Tanya Dutta Cenap Undemir Martin Cohen Wilbert s Aronow steven L Lansman Department of Medicine Westchester Medical Center and New York Medical CollegeValhallaNYUSA Department of Cardiology Westchester Medical Center and New York Medical CollegeValhallaNYUSA section of Cardiothoracic surgery Department of SurgeryWestchester Medical CenterValhallaNew YorkUSA

Background Transcatheter aortic valve replacement(TAVR)for the treatment symptomatic severe aortic stenosis(As)is indicated in patients with intermediate or higher surgical *** trials showed TAVR,and surgical aortic valve replacement(sAVR)perform similarly at 1-year for the composite outcomes of mortality,stroke and *** performed a comprehensive meta-analysis to compare individual outcomes at 1-year for TAVR compared to sAVR in low-risk *** Pub Med,Embase,and Cochrane central were searched for all the randomized controlled trials(RCTs)that reported 1-year comparative outcomes of TAVR and surgical aortic valve replacement(sAVR).Our conclusions are based upon the random-effects model using Der simonian-Laird *** Data from 4 trials and 2887 randomized patients showed that TAVR had lower rates of all-cause mortality,cardiovascular mortality,and atrial fibrillation compared to sAVR at 1-year follow-up(Pso,TAVR was also associated with a significantly higher risk of permanent pacemaker implantation and moderate-severe paravalvular leak(Psions The latest randomised trial data demonstrates that in short-term,TAVR is safe and effective in reducing all-cause mortality or *** follow-up of RCTs is needed to determine the durability of clinical benefits in TAVR over sAVR in low-risk patients.

关键词： Aortic stenosis Low surgical risk Meta-analysis Transcatheter aortic valve replacement

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Mechanistic study of Asymmetric Binary-acid Catalysis with InⅢ in Enantioselective exo-[4+2]Cycloaddition of Olefin

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Mechanistic Study of Asymmetric Binary-acid Catalysis with I...

手性中国2014学术研讨会

作者： j.Lv L.Zhang X.Zhong s.Luo Beijing National Laboratory for Molecular sciences（BNLMs） CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of Sciences

＜正＞The Diels-Alder reaction,[4+2]cycloadditions between electronically matched dienes and dienophiles,is one of synthetic organic chemists’text-book reactions.[1]Though Bransted acids or Lewis acids as well as their chiral variants are well-known to promote asymmetric Diels-Alder reactions,[2]the application of typical acid catalysis with simple olefins has received rather limited ***,the acid catalysis usually proceeds via non-covalent activation of the electron-deficient species(either dienophile or

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study on numerical simulation of nodular graphite iron microstructure formation

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China Foundry 2004年第S1期1卷 44-48页

作者： j.Yang s.F.su X.B.Qi X.L.Ai shenyang Research institute of Foundry Shenyang 110022LiaoningP.R.China school of Material science and Engineering Shenyang Polytechnic UniversityShenyang 110023LiaoningP.R.China

In this paper, the mathematical and physical model was developed based on thermodynamics and solidification theory before the eutectoid transformation of nodular graphite iron occurred. The Local Element substitute and Magnification Method was brought forward and 3-dimensional numerical simulation program based on the model and the new assistant algorithm was developed and used to calculate the samples. Results of calculation have good agreement with experimental data. To display the microstructure formation during solidification of nodular graphite iron, a 2-dimensional numerical simulation program combined with the result of the 3-dimensional numerical simulation of experimental samples was compiled.

关键词： nodular graphite iron microstructure numerical simulation the Local Element substitute and Magnification Method dynamically display

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DEBYE TEMPERATURE OF NANOCRYsTALLINE Fe-Cr ALLOYs OBTAINED BY MECHANICAL ALLOYING

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DEBYE TEMPERATURE OF NANOCRYSTALLINE Fe-Cr ALLOYS OBTAINED B...

8th International symposium on the Industrial Applications of the Mossbauer Effect

作者： j.Cieslak B.F.O.Costa s.M.Dubiel AGH University of science and Technology Faculty of Physics and Applied Computer Science30-059 KrakowPoland CEMDRX Department of Physics University of Coimbra3000-516 CoimbraPortugal

Physical properties of nano-scale materials are,in general, different from their bulk *** is also the case for dynamical properties of ***,the Debye temperature,θ,found for small particles reflects a strong effect of the surface-atomic *** example,in the case of small Au clusters,θ(surface) = 97 K againstθ(core) = 165 K[1].For samples in the form films it was shown thatθ increases with their

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肢端肥大症的全球流行病学:系统综述和荟萃分析

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中华医学杂志 2021年第27期101卷 2114-2114页

作者： Crisafulli s Luxi N sultana j 代从新(编译) 不详首都医科大学附属北京同仁医院

肢端肥大症是一种罕见的、起病隐匿的慢性进展性内分泌疾病。因其发病率较低,目前尚无关于肢端肥大症全球流行病学的系统综述和荟萃分析报道二Crisafulli等通过系统文献综述和荟萃分析对肢端肥大症全球流行病学进行报道。通过在***和Coc... 详细信息

肢端肥大症是一种罕见的、起病隐匿的慢性进展性内分泌疾病。因其发病率较低,目前尚无关于肢端肥大症全球流行病学的系统综述和荟萃分析报道二Crisafulli等通过系统文献综述和荟萃分析对肢端肥大症全球流行病学进行报道。通过在***和Cochrane图书馆数据库中搜索截至2020年1月31日关于肢端肥大症流行病学的研究。

关键词：肢端肥大症荟萃分析系统综述内分泌疾病流行病学 Cochrane图书馆数据库

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