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Effect of the Number and Orientation of Fractures on the P-Wave Velocity Diminution: Application on the Building Stones of the Rabat Area (Morocco)

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Geomaterials 2013年第3期3卷 71-81页

作者： Hamid El Azhari iz-Eddine El Amrani El Hassani Université Mohammed V-Agdal (maroc) Faculté des Sciences Département de Géologie Rabat Morocco Université Mohammed V-Agdal (maroc) Institut Scientifique Département des Sciences de la Terre Equipe de Géomatériaux et Géo-Environnement (GeoM&E) Rabat Morocco

This study is focused on two types of Moroccan rocks, among the most widely used as building stones: the calcarenite of Salé (CS) and the marble of oued Akrech (ma). The two rocks, lithologically different, show a clear contrast of their P-wave velocities (Vp): 3.90 vs 5.10 km/s at dry state and 4.29 vs 5.64 km/s at saturation. The “Artificial fractures” created in the two rock types reveal that their Vp undergo diminutions which the rates vary depending of the number and the plane orientation of the fractures. In the CS, Vp shows an increasing of cumulative diminution (Dc) according to the number of fractures, but with a variable rate of unitary diminution (Du) from one fracture to the other. This defines a linear regression with a low coefficient of determination (Dc = 10.18NbFr + 10.96;r2 = 0.87). The mode of the Vp evolution would be related to the roughness of fractures surface, which itself depends upon the petrographic nature of the calcarenite (friable structure, high porosity and heterogenous composition). The ma manifested an increasing Dc with a fairly constant rate of Du from a fracture to another, giving a regression line with a high coefficient of determination (Dc = 12.17NbFr – 10.69;r2 = 0.99). This steady diminution of Vp would be related to the granoblastic texture and the monomineral composition of the marble, which engender smoother fracture surfaces. The rates of Vp diminution also depend on the orientation plane of the fractures relative to the direction of wave propagation. The fractures parallel (θ = 0°) amplify slightly the Vp, playing a significant role of “waveguide”. The fractures oriented at 45° lead to a diminution lower than those of fractures oriented at 25° and 90°. The same trend of diminution, but at variable rates, appears on the samples of the two types of stones at dry and saturated state. This can be explained by the compressive nature of P-waves, which obey the physic laws of the transmission of the constraints in the solid me

关键词： Fracture Diminution P-Wave Velocity Calcarenite marble Morocco

A targeted QTL analysis for fiber length using a genetic population between two introgressed backcrossed inbred lines in upland cotton(Gossypium hirsutum)

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The Crop Journal 2019年第3期7卷 273-282页

作者： Guoyuan Liua Wenfeng Pei Dan Li Jianjiang ma Yupeng Cui Nuohan Wang Jikun Song man Wu Libei Li Xinshan Zang Shuxun Yu Jinfa Zhang Jiwen Yu State Key Laboratory of Cotton Biology Cotton Institute of the Chinese Academy of Agricultural SciencesKey Laboratory of Cotton Genetic ImprovementMinistry of AgricultureAnyang 455000HenanChina Xinjiang Research Base State Key Laboratory of Cotton BiologyXinjiang Agricultural UniversityUrumqi 830001XinjiangChina Department of Plant and Environmental Sciences New Mexico State UniversityLas CrucesNM 88003USA

Cotton fiber is the most important natural raw material for the textile industry, and fiber length(FL) is one of the most important traits in *** trait locus(QTL)mapping based on high-density genetic maps is an efficient approach to identify genetic regions for *** our study, two backcrossed inbred lines(BILs) were chosen as parents to construct a high-density genetic map in F2 which was used to fine map FL QTL in F2:3 *** genetic map had a total size of 3462.8 cM, containing 9182 singlenucleotide polymorphisms(SNPs) based on *** FL related stable QTL were identified on two chromosomes(qFL-A08–1 on A08 and qFL-D03–1 on D03),and qFL-A08–1 was confirmed by a *** previously obtained RNA-seq data for the two BILs and qRT-PCR analysis, two candidate genes annotated as cytochrome b5(CB5, Gh_A08 G1729) and microtubule end-binding 1 C(EB1C, Gh_D03 G0232) that may regulate FL during the fiber elongation stage were *** addition, nine recombination hotspots in this population were *** results of this study will provide an important foundation for further studies on the molecular and genetic regulation of fiber elongation.

关键词： Gossypium Single-nucleotide polymorphism Fiber length Quantitative trait locus

切开复位内固定与外固定治疗不稳定桡骨远端骨折远期疗效的荟萃分析

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中华医学杂志 2017年第41期97卷 3269-3272页

作者：杨召苑珍珍马剑雄马信龙天津市天津医院骨科 300211

目的系统评价切开复位内固定与外固定两种方法治疗不稳定桡骨远端骨折的远期疗效。方法计算机检索PubMed，ScienceDirect，EMBASE，BIOSIS，Springer和Cochrane Library等数据库，纳入关于切开复位内固定与外固定两种方法治疗不稳定桡... 详细信息

目的系统评价切开复位内固定与外固定两种方法治疗不稳定桡骨远端骨折的远期疗效。方法计算机检索PubMed，ScienceDirect，EMBASE，BIOSIS，Springer和Cochrane Library等数据库，纳入关于切开复位内固定与外固定两种方法治疗不稳定桡骨远端骨折远期疗效比较的随机对照试验（RCT）。制定入选和排除标准，筛选出符合纳入标准的文献，评价纳入研究的方法学质量。利用Revman5．0（Cochrane Library）进行荟萃分析。结果共有16篇研究符合纳入标准，共1268例患者，切开复位内固定组618例，外固定组650例。切开复位内固定与外固定比较，在术后并发症[感染（I^2=0％，RR=0．27，95％CI0．16～0．45，Z=4．92，P〈0．00001）及术后总并发症（I^2=0％，RR=0．71，95％CI0．59—0．85，Z=3．65，P=0．0003）]、随访终期的DASH评分（I^2=37％，MD=-5．67，95％CI-8．31--3．04，Z=4．22，P〈0．0001）和掌倾角（I^2=78％，MD=2．29，95％CI0．33—4．24．Z=2．30，P=0．02）方面，两者差异有统计学意义（P〈0．05）；而随访终期的临床结果（握力、伸展、屈曲、旋前、旋后、桡偏及尺偏）及影像学结果（桡骨长度）方面，两者差异均无统计学意义（均P〉0．05）。结论切开复位内固定与外固定治疗不稳定桡骨远端骨折均取得了一定的远期疗效；与外固定相比，切开复位内固定具有更低的术后并发症、远期DSAH评分和更好的掌倾角恢复。

关键词：骨折固定术,内骨折综合分析桡骨

Optimization of performance of the KM2A full array using the Crab Nebula

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Chinese Physics C 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 S.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.Heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.Kuleshov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 W.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.Sáiz D.Semikoz 邵澄宇邵琅 O.Shchegolev 盛祥东舒富文宋慧超 Yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 LHAASO Collaboration Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Tianfu Cosmic Ray Research Center Chengdu 610000China Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Hefei 230026China School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal University Shijiazhuang 050024China Key Laboratory of Dark matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Physics and Astronomy(Zhuhai)&School of Physics(Guangzhou)&Sino-French Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China School of Physics and Astronomy Yunnan UniversityKunming 650091China Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China APC Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the Large High Altitude Air Shower Observatory(LHAASO)has been in operation since July *** its kilometer-square array(KM2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%,compared with that of previous *** the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of *** aspects of the full KM2A array performance,such as the pointing error,were also calibrated using the Crab *** resulting energy spectrum of the Crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from LHAASO and other experiments.

关键词： γ-ray Crab Nebula significance

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基于TRiz及ABD的创新设计研究

工程设计学报 2006年第4期13卷 193-198页

作者：马建红檀润华河北工业大学创新设计研究所天津300130

应用基于类比的设计(ABD)和发明问题解决理论(TR iz)的设计过程均要采用已往成功的设计实例,使两种过程具有相似性;在分析ABD及TR iz设计过程原理的基础上,提出将TR iz解模型及相应的设计实例作为ABD的源设计,由类比设计过程确定目标设... 详细信息

应用基于类比的设计(ABD)和发明问题解决理论(TR iz)的设计过程均要采用已往成功的设计实例,使两种过程具有相似性;在分析ABD及TR iz设计过程原理的基础上,提出将TR iz解模型及相应的设计实例作为ABD的源设计,由类比设计过程确定目标设计及新设计的方法.造纸机改进设计实例说明了该方法的应用.

关键词：基于类比的设计发明问题解决理论(TRiz) 设计过程创新设计

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GmaW电弧声的参数化模型及应用

机械工程学报 2005年第11期41卷 109-114页

作者：马跃洲陈剑虹梁卫东兰州理工大学材料学院兰州730050

以焊接质量在线监控为目的,针对短路过渡气体保护焊(GmaW)电弧声信号进行了时域和频域特征分析,提出电弧声道的概念,建立其参数化等效电气模型。利用线性预测(LPC)模型参数构造径向基函数(RBF)神经网络输入样本空间,对焊接保护气流量不... 详细信息

以焊接质量在线监控为目的,针对短路过渡气体保护焊(GmaW)电弧声信号进行了时域和频域特征分析,提出电弧声道的概念,建立其参数化等效电气模型。利用线性预测(LPC)模型参数构造径向基函数(RBF)神经网络输入样本空间,对焊接保护气流量不足进行了在线模式识别。研究认为:电弧声呈现振铃形信号,主要发生于短路结束再引弧时刻,大部分能量分布在10kHz以下频带。电弧声源于电弧能量变化,电弧及其周边的物理和几何形态形成分布参数的声道系统。电弧声是声源和声道共同作用的结果,其频谱主要取决于声道的作用。声道可用时变系数的数字滤波器等效,LPC是其参数化模型的一个估计,在焊接质量在线监控方面具有应用价值。

关键词：电弧声时频分析线性预测模型径向基函数神经网络熔化极气体保护电弧焊质量监控

预制短型与现浇长型浮置板轨道动力特性及服役性能比较研究

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土木工程学报 2016年第9期49卷 117-122,128页

作者：马龙祥刘维宁姜博龙西南交通大学交通隧道工程教育部重点实验室四川成都610031 北京交通大学北京100044

为了比较浮置板轨道预制短板型式与现浇长板型式动力特性及服役性能的差异，将轨道结构作为一种周期性的无限结构，根据两种轨道自身的结构特点，建立相应动力计算模型进行了计算及分析。计算结果表明：（1）预制短型浮置板轨道结构对... 详细信息

为了比较浮置板轨道预制短板型式与现浇长板型式动力特性及服役性能的差异，将轨道结构作为一种周期性的无限结构，根据两种轨道自身的结构特点，建立相应动力计算模型进行了计算及分析。计算结果表明：（1）预制短型浮置板轨道结构对低频荷载的分摊承载能力弱于现浇长型浮置板轨道结构；（2）浮置板交错反相振动的轨道模态对预制短型浮置板轨道结构的振动影响较大，但对现浇长型浮置板轨道结构的振动几乎没有影响；（3）运行列车作用下，现浇30m长板浮置板轨道的钢轨及浮置板响应在30～100Hz频段内大于预制3．6m短板浮置板轨道，但预制3．6m短板浮置板轨道的钢轨及浮置板响应在25Hz以下的大部分频段却大于现浇30m长板浮置板轨道；（4）相较于现浇长型浮置板轨道，预制短浮置板轨道应采用疲劳寿命更长的隔振器。

关键词：浮置板轨道板长预制短板现浇长板动力特性服役性能

ADAM17 is critical for multipolar exit and radial migration of neuronal intermediate progenitor cells in mice cerebral cortex

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ADAM17 is critical for multipolar exit and radial migration ...

Coactosin-like protein-1 inhibit neuronal migration during mouse brain development

中国神经科学学会第十届全国学术会议

作者： Qingyu Li Zhengyu Zhang Zengmin Li Mei Zhou Bin Liu Le Pan Zhixing ma Yufang Zheng School of Life Sciences Fudan University

The radial migration of neuronal progenitor cells is critical for the development of cerebral cortex *** go through a critical step transforming from multipolar to bipolar before outward migration.A Disintegrin and Metalloprotease 17（ADAM17） is a transmembrane protease which can process many substrates involved in cell-cell interaction,including Notch,ligands of EGFR,and some cell adhesion *** this study,we used in utero electroporation to knock down or overexpress ADAM17 at embryonic day 14.5（E14.5） in neuronal progenitor cells to examine the role of ADAM17 in cortical embryonic *** results showed that the radial migration of ADAM17-knocked down cells were normal till E16.5 and reached the intermediate zone（iz）.Then most transfected cells stopped migration and stayed at the iz to inner cortical plate（CP） layer at E18.5,and there was higher percentage of multipolar cells at iz layer in the ADAM17-knocked down group compared to the cells in control *** staining revealed that those ADAM17-knocked down cells differentiated normally from neural stem cells（NSCs） to neuronal intermediate progenitor cells（nIPCs） but did not differentiate into mature *** migration and multipolar exit defects caused by ADAM17 knockdown could be partially rescued by over-expressing an shRNA resistant ADAM17,while overexpressing ADAM17 alone did not affect the radial *** together,our results showed for the first time that,ADAM17 is critical in regulating the multipolar-stage exit and radial migration of the nIPCs during telencephalon cortex development in mice.

关键词： ADAM17 neuronal intermediate progenitor cells radial migration multipolar-stage exit cortex development

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Coactosin-like protein-1 inhibit neuronal migration during m...