检索结果-南通市图书馆

Excavation of underground research laboratory ramp in granite using tunnel boring machine: Feasibility study

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2020年第6期12卷 1201-1213页

作者： Hongsu Ma Ju Wang ke man Liang Chen Qiuming Gong Xingguang Zhao CNNC key Laboratory on Geological Disposal of High-level Radioactive Waste Beijing Research Institute of Uranium GeologyBeijingChina North China University of Technology BeijingChina key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijingChina

Underground research laboratory(URL)plays an important role in safe disposal of high-level radioactive waste(HLW).At present,the Xinchang site,located in Gansu Province of China,has been selected as the final site for China’s first URL,named Beishan *** this,a preliminary design of the Beishan URL has been proposed,including one spiral ramp,three shafts and two experimental *** advantages of fast advancing and limited disturbance to surrounding rock mass,the tunnel boring machine(TBM)method could be one of the excavation methods considered for the URL *** paper introduces the feasibility study on using TBM to excavation of the Beishan URL *** technical challenges for using TBM in Beishan URL are identified on the base of geological condition and specific layout of the spiral ***,the technical feasibility study on the specific issues,*** hard rock mass,high abrasiveness,TBM operation,muck transportation,water drainage and material transportation,is *** study demonstrates that TBM technology is a feasible method for the Beishan URL *** results can also provide a reference for the design and construction of HLW disposal engineering in similar geological conditions.2020 Institute of Rock and Soil Mechanics,Chinese Academy of *** and hosting by Elsevier *** is an open access article under the CC BY-NC-ND license(http://***/licenses/by-nc-nd/4.0/).

关键词： Underground research laboratory(URL) High-level radioactive waste(HLW)disposal Tunnel boring machine(TBM) Extremely hard rock mass Rock mass boreability Spiral layout Beishan

Synthesis and Characterization of a Novel Compound SnDy2O4

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2002年第6期13卷 587-588页

作者： Yong ZHANG ke Li ZHANG man ke JIA Hao TANG Ju Tang SUN Liang Jie YUAN College of Chemistry and Molecular science Department of ChemistryWuhan UniversityWuhan 430072

A new phase, the rare earth complex oxide SnDy2O4 was synthesized by the thermal decomposition of its oxalate precursor that was prepared by rheological phase reaction method. TG, IR, XRD and EPS were used to prove the formation of the compound SnDy2O4. The structure of SnDy2O4 was refined by Rietveld analysis. SnDy2O4 is cubic, a = 7.40366 ? V = 405.82 ?, Z = 4.

关键词： Rare earth complex oxide SnDy2O4 rheological phase reaction thermal analysis.

Increased retinal venule diameter as a prognostic indicator for recurrent cerebrovascular events:a prospective observational study

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第5期19卷 1156-1160页

作者： Ying Zhao Dawei Dong Ding Yan Bing Yang Weirong Gui man ke Anding Xu Zefeng Tan Department of Neurology and Stroke Center the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Clinical Neuroscience Institute the First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Neurology the First People’s Hospital of FoshanFoshanGuangdong ProvinceChina

Microvasculature of the retina is considered an alternative marker of cerebral vascular risk in healthy ***,the ability of retinal vasculature changes,specifically focusing on retinal vessel diameter,to predict the recurrence of cerebrovascular events in patients with ischemic stroke has not been determined *** previous studies have shown a link between retinal vessel diameter and recurrent cerebrovascular events,they have not incorporated this information into a predictive ***,this study aimed to investigate the relationship between retinal vessel diameter and subsequent cerebrovascular events in patients with acute ischemic ***,we sought to establish a predictive model by combining retinal veessel diameter with traditional risk *** performed a prospective observational study of 141 patients with acute ischemic stroke who were admitted to the First Affiliated Hospital of Jinan *** of these patients underwent digital retinal imaging within 72 hours of admission and were followed up for 3 *** found that,after adjusting for related risk factors,patients with acute ischemic stroke with mean arteriolar diameter within 0.5-1.0 disc diameters of the disc margin(MAD_(0.5-1.0DD))of≥74.14μm and mean venular diameter within 0.5-1.0 disc diameters of the disc margin(MVD_(0.5-1.0DD))of≥83.91μm tended to experience recurrent cerebrovascular *** established three multivariate Cox proportional hazard regression models:model 1 included traditional risk factors,model 2 added MAD_(0.5-1.0DD)to model 1,and model 3 added MVD0.5-1.0DD to model *** 3 had the greatest potential to predict subsequent cerebrovascular events,followed by model 2,and finally model *** findings indicate that combining retinal venular or arteriolar diameter with traditional risk factors could improve the prediction of recurrent cerebrovascular events in patients with acute ischemic stroke,and that retinal imaging c

关键词： acute ischemic stroke arteriolar cerebrovascular events diameter digital retinal imaging microvasculature prediction recurrent retina venular

Probing the Majorana bound states in a hybrid nanowire double-quantum-dot system by scanning tunneling microscopy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第7期29卷 474-480页

作者： Jia Liu ke-man Li Feng Chi Zhen-Guo Fu Yue-Fei Hou Zhigang Wang Ping Zhang School of Science Inner Mongolia University of Science and TechnologyBaotou 014010China School of Electronic and Information Engineering Zhongshan InstituteUniversity of Electronic Science and Technology of ChinaZhongshan 528400China Institute of Applied Physics and Computational Mathematics Beijing 100088China

We propose an interferometer composing of a scanning tunneling microscope(STM),double quantum dots(DQDs),and a semiconductor nanowire carrying Majorana bound states(MBSs)at its ends induced by the proximity effect of an s-wave superconductor,to probe the existence of the MBSs in the *** results show that when the energy levels of DQDs are aligned to the energy of MBSs,the zero-energy spectral functions of DQDs are always equal to 1/2,which indicates the formation of the MBSs in the DQDs and is also responsible for the zero-bias conductance *** findings suggest that the spectral functions of the DQDs may be an excellent and convenient quantity for detecting the formation and stability of the spatially separated MBSs in quantum dots.

关键词： quantum dot scanning tunneling microscopy Majorana bound states

THE IMPACT OF HORIZONTAL RESOLUTION ON THE INTENSITY AND MICROSTRUCTURE OF SUPER TYPHOON USAGI

在线全文

学校读者我要写书评

暂无评论

Journal of Tropical Meteorology 2019年第1期25卷 24-33页

作者： WEN Ying-fang LIU Yu-di TAN Wei-cai PENG ke-man CHEN Hai-feng College of Meteorology and Oceanography Defense University of Science and Technology Guangzhou Meteorological Bureau Unit No.75839 of People's Liberation Army Guiyang Meteorological Bureau

Typhoon Usagi(1319) was simulated by using the Advanced Weather Research and Forecasting numerical model(WRF) with different horizontal resolution to understand the impact of horizontal resolution on the intensity and characteristics of typhoon's microstructures(including dynamic and microphysical structure). The simulated results show that the improvement of horizontal resolution from 5 km to 1 km has little impact on the track which is comparable to real results, but has a significant impact on the intensity and microstructures, and especially, the impact on wind speed at 10 m height, the vertical movement and precipitation intensity is the greatest. When the resolution is increased to 1 km, the intensity and characteristics of typhoon's microstructures can be simulated better. In lower resolution simulations, some structural characteristics, including more asymmetrical and more outward tilted eyewall, and less water vapor flux on sea surface, work together to weaken typhoon intensity.

关键词： typhoon horizontal resolution microstructure Usagi numerical simulation

回汉文化交融与民族关系初探——以甘肃省临夏市为例

在线全文

学校读者我要写书评

暂无评论

西北民族研究 2016年第3期 178-184页

作者：满珂西北民族大学民族学与社会学学院

文章初步探讨了甘肃省民族杂居地区——临夏市的回、汉文化越界与交融现象,并结合有关族群理论和历史事实说明:文化交融现象本身就是民族关系良性运行的结果和反映,从族群"原生主义"理论的视角来看,它继而可以成为两个民族彼此认同的基... 详细信息

文章初步探讨了甘肃省民族杂居地区——临夏市的回、汉文化越界与交融现象,并结合有关族群理论和历史事实说明:文化交融现象本身就是民族关系良性运行的结果和反映,从族群"原生主义"理论的视角来看,它继而可以成为两个民族彼此认同的基础之一。

关键词：甘肃文化交融民族关系临夏

族群表达、城市化与国家政策:甘肃省兰州市少数民族的存在状况初探

在线全文

学校读者我要写书评

暂无评论

西北民族研究 2013年第4期 92-99页

作者：满珂西北民族大学民族学与社会学学院

本文考察了甘肃省兰州市(不包括三县)主要少数民族的分布状况、族群表达方式,并通过探究各少数民族入住兰州的历史、原因和过程,发现其存在状态的"合理性"和建国后的国家政策在少数民族城市化中的重要作用。

关键词：族群表达城市化国家政策兰州少数民族

在线全文

学校读者我要写书评

暂无评论

批判与建构:女性主义社会研究方法略论

西北民族研究 2015年第1期 96-102,151页

作者：满珂西北民族大学民族学与社会学学院

本文借助西方女性主义的研究成果,概括了女性主义对于传统社会研究方法(尤其是实证主义)的反思与批判,并在此基础上,总结了女性主义研究方法的基本原则、目标与具体内涵。

关键词：社会科学研究方法女性主义

赋权/解放还是控制/伤害?——有关生育技术的女性主义讨论

在线全文

学校读者我要写书评

暂无评论

西北民族研究 2012年第3期 179-187页

作者：满珂西北民族大学民族学与社会学学院

随着科学的发展,生育技术日益为人们所熟悉,从避孕、流产到各种生育辅助、治疗手段,琳琅满目、数量众多。这些技术的发达到底给女性带来了怎样的影响呢?本文回顾了国外女性主义学者的有关讨论,在此基础上,结合自己的研究,得出如下结论:... 详细信息

随着科学的发展,生育技术日益为人们所熟悉,从避孕、流产到各种生育辅助、治疗手段,琳琅满目、数量众多。这些技术的发达到底给女性带来了怎样的影响呢?本文回顾了国外女性主义学者的有关讨论,在此基础上,结合自己的研究,得出如下结论:简单地将生育技术定性为解放或者伤害女性是没有意义的,关键是要分析它被应用的社会。只有消除了父权制意识形态和社会结构,生育技术才能真正被用于女性解放。

关键词：赋权/解放控制/伤害生育技术女性主义