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Photoproduction of the Θ^+ and its vector andaxial-vector structure

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ch.nese Physics C 2009年第12期33卷 1279-1284页

作者： H.-ch. Kim K. Goeke T. Ledwig S. i. Nam Department of Physics Inha University Incheon 402-751 Republic of Korea Institut fr Theoretisch. Physik II Ruhr-Universitt Bochum D-44780 Bochum Germany Institut fr Kernphysik Universitt Mainz D-55099 Mainz Germany Department of Physics Chung-Yuan Christian University (CYCU)

We present recent investigations on the vector and axial-vector transitions of the baryon antidecuplet within the framework of the self-consistent SU（3） ch.ral quark-soliton model, taking into account the 1/No rotational and linear mscorrections. The main contribution to the electric-like transition form factor comes from the wave-function corrections. This is a consequence of the generalized Ademollo-Gatto theorem. It is also found that in general the leading-order contributions are almost canceled by the rotational 1/No corrections. The results are summarized as follows： the vector and tensor K＇NO coupling constants, gK＊N= 0.74--0.87 and fk＊N =0.53--1.16, respectively, and F→KN = 0.71 MeV, based on the result of the KN coupling constant gKne =0.83. We also show the differential cross sections and beam asymmetries, based on the present results. We also discuss the connection of present results with the original work by Diakonov, Petrov, and Polyakov.

关键词： Baryon antidecuplet vector and axial-vector transition form factors ch.ral quark-soliton model,Photoproduction of the +

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湍流预混火焰中的浮力效应

工程热物理学报 2004年第3期25卷 527-530页

作者：王岳雷宇 ch.Eigenbrod Y Tang 中国科学院工程热物理研究所 Universitat Bremen D-28359 BremenGermany

本文利用数值模拟研究了浮力对湍流预混V形火焰平均速度场的影响,发现浮力效应主要体现在远场区域,而在火焰刷附近非常有限;利用落塔和 OH-PLIF 方法在正常重力和微重力下观测了火焰皱褶,发现浮力压制火焰皱褶的程度与湍流强度密切相关... 详细信息

本文利用数值模拟研究了浮力对湍流预混V形火焰平均速度场的影响,发现浮力效应主要体现在远场区域,而在火焰刷附近非常有限;利用落塔和 OH-PLIF 方法在正常重力和微重力下观测了火焰皱褶,发现浮力压制火焰皱褶的程度与湍流强度密切相关。分析表明斜压机理是浮力影响火焰皱褶的重要原因。

关键词：浮力预混火焰数值模拟 OH-PLIF 皱褶

Impact of Earthquake Action on the Design and Sizing of Jointed Masonry Structures in South Kivu, DRC

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Open Journal of Civil Engineering 2024年第1期14卷 127-153页

作者： Edmond Dawak Fezeu Marcelline Blanch. Manjia ch.rif Bishweka Biryondeke Patient Kubuya Binwa Élodie Rufine Zang ch.ispin Pettang Laboratory of Engineering Civil and Mech.nics Doctoral Research Unit for Engineering and Applications University of Yaound&#233 I Yaound&#233 Cameroon Department of Civil Engineering Faculty of Applied Sciences and Technologies Free University of Great Lakes Countries Goma DRC

This article deals with the investigation of the effects of seismic impacts on the design and dimensioning of structures in South Kivu. The starting point is the observation of an ambivalence that can be observed in the province, namely the non-consideration of seismic action in the study of structures by both professionals and research.rs. The main objective of the study is to show the importance of dynamic analysis of structures in South Kivu. It adopts a meta-analytical approach.referring to previous research.s on South Kivu and proposes an efficient and optimal method. To arrive at the results, we use Eurocode 7 and 8. In addition, we conducted static analysis using the Coulomb method and dynamic analysis using the Mononobe-Okabe method and compared the results. At Nyabibwe, the results showed that we have a deviation of 24.47% for slip stability, 12.038% for overturning stability and 9.677% for stability against punch.ng through a weight wall.

关键词： Jointed Masonry Weight-Bearing Structures Seismic Action Eurocode 7 and 8 Static and Dynamic Analysis

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泥浆錄井中的气测法和萤光法

石油实验地质 1965年第2期 4-8页

作者： C.苏希士,ch.柏叶,张义纲法法

泥浆録井可以用最短的时间标定生产层,于是再进行特定的工作来进一步了解它。泥浆録井是在泥浆中直接揭示出烃类气体和原油的,它的基本特点是并不妨碍钻进的正常进行。

关键词：烃类气体乙烷气中气冲脱气器检定器红外分析器石油原油油气显示流体沼气烷烃甲烷油层矿物燃料矿床储油层萤光

ch.racterization of mech.nical properties and microstructures of spark plasma sintered and cryo-rolled AA2024−Y composites

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Transactions of Nonferrous Metals Society of ch.na 2020年第6期30卷 1439-1451页

作者： ch.S.VIDYASAGAR D.B.KARUNAKAR Metallurgical and Materials Engineering Department Indian Institute of TechnologyRoorkee-247667India Mech.nical and Industrial Engineering Department Indian Institute of TechnologyRoorkee-247667India

The relationship between the microstructure and mech.nical properties of the spark plasma sintered AA2024 Y composites subjected to cryo-rolling was investigated. Yttrium addition enhances the mech.nical properties of the composites by promoting grain refinement and precipitation. However, there is a clear trend of initial increase and later decrease in the properties. Also, it is observed that 0.3 wt.% of yttrium is the optimum amount of reinforcement content to obtain the highest mech.nical properties. To further improve the tensile strength of the composites, cryo-rolling was performed on the composites under standard cryogenic conditions by several passes up to a reduction of 25%. The mech.nical properties and the corresponding microstructures of composites after cryo-rolling were correlated. The SEM and TEM microstructures reveal that the samples exhibit dual size grains, i.e., nanograins are formed as sub-grains within the actual grain. Due to the grain size reduction and the increase in the dislocation density, the tensile properties are remarkably improved compared to those of the composites before cryo-rolling. The highest mech.nical properties like hardness, YS and UTS are found to be 153 HV, 539 MPa and 572 MPa, respectively, with a reasonable ductility in the composite with 0.3 wt.% Y.

关键词： secondary processing cryo-rolling nanograins yttrium addition dual size grains spark plasma sintering

Effects of yttrium addition and aging on mech.nical properties of AA2024 fabricated through multi-step stir casting

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Transactions of Nonferrous Metals Society of ch.na 2020年第2期30卷 288-302页

作者： ch.S.VIDYASAGAR D.B.KARUNAKAR Metallurgical and Materials Engineering Department Indian Institute of Technology Roorkee-247667India Mech.nical and Industrial Engineering Department Indian Institute of Technology Roorkee-247667India

The effects of yttrium and artificial aging on AA2024 alloy were *** developed samples were further subjected to artificial aging at 190℃for 1-10 h with an interval of 1 *** metallurgical ch.racterization was done by scanning electron microscope and X-ray *** mech.nical ch.racterization like hardness and tensile strength of the samples was done using computerized Vickers hardness testing mach.ne and universal testing *** microstructures revealed that addition of yttrium refined theα(Al)matrix and led to the formation of Al-Cu-Y intermetallic in the shape of ch.nese script which.strengthened the *** to the base metal,samples with yttrium addition showed better mech.nical *** sample reinforced with 0.3 wt.%yttrium showed the highest mech.nical properties with the hardness of 66 HV,UTS of 223 MPa,YS of 180 MPa,and elongation of 20.9%.The artificially aged samples showed that the peak hardening of all the samples took place within 5 h of aging at 190℃with Al2 Cu *** ch.nged the intermetallic from ch.nese script to the fibrous *** optimum amount of yttrium addition to AA2024 was found to be 0.3 wt.%.

关键词： yttrium artificial aging mech.nical properties multi-step stir casting precipitation microstructure ch.racterization

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莫里哀戏剧故事集第1版

六极杆电场对ch.3X(X=Cl,Br,I)分子转动态的选择和聚焦

丛书名：中学生文库

1958年

作者：（法）诺尔曼（J.ch. Normand）（法）马尔斯（A.Mars）改写李桐实金志平译

本书搜集了“屈打成医”、“伪君子”、“悭吝人”、“向贵人看齐”、“没病找病”这五个故事。

ISBN: (数字)10009·311

ISBN: (纸本)10009·311

本书搜集了“屈打成医”、“伪君子”、“悭吝人”、“向贵人看齐”、“没病找病”这五个故事。

关键词：文学欧洲文学

来源：汇雅图书（南通市图书馆... 评论

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中南民族大学学报（自然科学版） 2016年第2期35卷 67-71,78页

作者：邱学军裴忠惠锁佩琦中南民族大学电子信息工程学院武汉430074

分析了六极杆电场对对称陀螺分子转动态选择和聚焦的原理,采用Monte Carlo方法模拟了ch.3X(X=Cl,Br,I)分子在六极杆电场中聚焦曲线,获得了单一转动态的分子;通过比较一阶Stark效应和二阶Stark效应对分子聚焦曲线的影响,得到了考虑二阶St... 详细信息

分析了六极杆电场对对称陀螺分子转动态选择和聚焦的原理,采用Monte Carlo方法模拟了ch.3X(X=Cl,Br,I)分子在六极杆电场中聚焦曲线,获得了单一转动态的分子;通过比较一阶Stark效应和二阶Stark效应对分子聚焦曲线的影响,得到了考虑二阶Stark效应必要性的条件;以ch.3I分子|JKM>=|111>转动态为例,讨论了六极杆尺寸及载气对聚焦曲线的影响.模拟结果表明:可以为六极杆态选择和分子的取向实验装置设计及研究提供重要的参考.

关键词：六极杆态选择聚焦对称陀螺

分维分析（fractals）在地球物理学中的应用

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地质科技动态 1991年第8期 18-20页

作者：肖尔.,ch.刘素芳