检索结果-南通市图书馆

Cyclic Variability in Chemical Composition and Swelling-Shrinkage Properties of the Xiashu Loess Stratum near Nanjing,China

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2007年第5期17卷 666-672页

作者： XIA Jia HUANG Guang-Long liu zi-Tong chen Xin-Min Institute of Geotechnical Engineering Nanjing University of Technology Nanjing 210009 （China）

Xiashu loess strata are widely distributed along the middle-lower reaches of the Yangtze River in East China with the stratum near Nanjing,Jiangsu Province being *** cyclic variability of the stratum was investigated through comparison of geological features,chemical composition,and swelling-shrinkage properties between the loess and the paleosol *** on the investigation of such a cyclic variability,soil behavior associated with the unsaturated state of the Xiashu loess stratum and its usefulness for geotechnical design and construction in the Nanjing area was analyzed. The stratum consisted of two types of cyclically alternating soil layers,namely the loess and the paleosol layers,which was the major cause for its cyclic *** loess and the paleosol layers were formed in different sedimentary *** order to avoid detrimental results from the differential engineering properties between them,this study suggested for the practitioners the importance of inspecting the variation of water content and controlling the downward net fluxes during geotechnical construction in the Nanjing area.

关键词： chemical composition cyclic variability swelling-shrinkage properties unsaturated state Xiashu loessstratum

Comparison of Histological, Microbiological, and Molecular Methods in Diagnosis of Patients with TBLN Having Different Anti-TB Treatment Background

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2017年第6期30卷 418-425页

作者： CHE Nan Ying HUANG Shao Jun MA Yan HAN Yi liu zi chen ZHANG chen MU Jing ZHAO Dan QU Yang ZHANG Hai Qing liu Zhi Dong XU Shao Fa Department of Pathology Beijing Tuberculosis & Thoracic Tumor Research Institute Beijing Chest Hospital Capital Medical University Beijing 101149 China Department of Thoracic Surgery The affiliated hospital of Inner Mongolia Medical University Hohhot 010110 Inner Mongolia China Clinical Center Beijing Tuberculosis & Thoracic Tumor Research Institute Beijing Chest Hospital Capital Medical University Beo'ing 101149 China Department of Thoracic Surgery Beijing Tuberculosis & Thoracic Tumor Research Institute Beijing Chest Hospital Capital Medical University Beijing 101149 China

Objective The influence of anti-tuberculosis （TB） treatment history on tuberculous lymphadenitis （TBLN） diagnosis is unclear. Therefore, this study aims to evaluate the diagnostic methods, including histology, microbiology, and molecular tests, used for TBLN. Methods In this study, suspected patients with TBLN and having different anti-T8 treatment background were enrolled. All the samples were tested simultaneously by histology, ziehI-Neelsen （ZN） staining, mycobacterial culture （culture）, Xpert MTB/RIF （xpert）, real-time PCR, and high-resolution melting curve PCR （HRM）. Thereafter, the performance of these methods on samples with different anti-TB treatment background was assessed. Results In our study, 89 patients were prospectively included 82 patients with TBLN and 7 with other diseases. The overall sensitivities of Xpert, real-time PCR, histology, ZN staining, and culture were 86.6%, 69.5%, 58.5%, 43.9%, and 22.0%, respectively. The anti-TB treatment history revealed dramatic influences on the sensitivity of culture （P 〈 0.0001）. In fact, the treatment that lasted over 3 months also influenced the sensitivity of Xpert （P 〈 0.05）. However, the treatment history did not affect the performance of remaining tests （P 〉 0.05）. For rifampicin drug susceptibility test （DST）, the anti-T8 treatment showed only significant influence on the success rate of culture DST （P = 0.001）, but not on those of Xpert and HRM tests （P 〉 0.05）. Conclusion Other tests as welt as culture should be considered for patients with TBLN having retreatment history or over 1-month treatment to avoid false negative results.

关键词： Tuberculous lymphadenitis Mycobacterial culture Molecular test Anti-TB treatment Drugresistance

Performance of Xpert MTB/RIF Ultra and Xpert MTB/RIF for the Diagnosis of Tuberculosis through Testing of Formalin-fixed Paraffin-embedded Tissues

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2019年第12期32卷 922-925页

作者： DU Wei Li SONG Jing WANG Jian Guo liu zi chen LI Kun WANG Yu Xuan DONG Yu Jie CHE Nan Ying Department of Pathology Beijing Key Laboratory for Drug Resistant Tuberculosis ResearchBeijing Chest HospitalCapital Medical UniversityBeijing Tuberculosis and Thoracic Tumor Research InstituteBeijing 101149China School of Biomedical Engineering Capital Medical UniversityBeijing 100069China Department of Medical Engineering Beijing Chest HospitalCapital Medical UniversityBeijing 101149China

Tuberculosis(TB)is a significant infectious disease caused by Mycobacterium tuberculosis(MTB).In 2017,10.0 million new TB cases and 1.3 million deaths were reported globally,according to World Health Organization(WHO)[1].The Mycobacterial culture test is the gold standard for diagnosis but the positive rate is only about 30%[1],and it is eve n lower with extrapulm onary *** sputum-negative pulmonary and extrapulm on ary TB,pathological exami nation playsan importa nt role in diag no *** detecti on of MTB in forma I i fixed pa raff i n-embedded(FFPE)tissues iscritical for the definite pathological diagnosis of culture-negative *** diagnosis is essentialin reducing TB-related morbidity and mortality[2].Molecular pathological tests detecting MTB DNA have shown advantages in improving diagnostic sen sitivity.

关键词： diagnosis Xpert Tuberculosis

基于CGE模型的我国西北地区民族经济政策模拟和实证研究

在线全文

学校读者我要写书评

暂无评论

运筹与管理 2015年第4期24卷 148-154页

作者：郭捷刘子辰中央民族大学管理学院北京100081

民族经济政策的模拟评估方法的缺失一直以来是我国民族经济政策效果有效性验证的一个短板。本文构建了基于CGE的西北地区民族经济政策评估模型,针对一般转移性支付政策进行系统模拟、政策力度对西北地区的经济要素以及当地企业产出的影... 详细信息

民族经济政策的模拟评估方法的缺失一直以来是我国民族经济政策效果有效性验证的一个短板。本文构建了基于CGE的西北地区民族经济政策评估模型,针对一般转移性支付政策进行系统模拟、政策力度对西北地区的经济要素以及当地企业产出的影响程度纵向对比分析,以及与东部沿海地区横向对比分析。本文的政策评估建模和模拟分析可以为我国西部大开发战略中一般性转移支付政策提供相应的决策支持。

关键词：政策模拟 CGE模型一般性转移支付政策

淫羊藿次苷Ⅰ在大鼠体内的药动学和组织分布研究

在线全文

学校读者我要写书评

暂无评论

中国药学杂志 2008年第11期43卷 848-851页

作者：刘子琛徐英陈世忠北京大学药学院中药研究室北京100083

目的研究淫羊藿次苷Ⅰ在血液和各组织中的HPLC检测方法及在大鼠体内的药动学和组织分布。方法采用Dikma-C18色谱柱(4·6mm×250mm,5μm),流动相甲醇-0·2%磷酸(73:27),流速1·0mL·min-1,检测波长270nm,柱温20℃。大鼠按淫羊藿次苷Ⅰ单... 详细信息

目的研究淫羊藿次苷Ⅰ在血液和各组织中的HPLC检测方法及在大鼠体内的药动学和组织分布。方法采用Dikma-C18色谱柱(4·6mm×250mm,5μm),流动相甲醇-0·2%磷酸(73:27),流速1·0mL·min-1,检测波长270nm,柱温20℃。大鼠按淫羊藿次苷Ⅰ单剂量10mg·kg-1尾静脉注射后,采用高效液相色谱法测定给药后不同时间的淫羊藿次苷Ⅰ血药浓度和各组织浓度,用3P97程序计算药动学参数。结果淫羊藿次苷Ⅰ的血药浓度-时间曲线符合二室模型,并在心脏和肌肉组织有一定程度的蓄积。结论此方法简便、准确、稳定,可用于淫羊藿次苷Ⅰ的药动学和组织分布研究。

关键词：淫羊藿次苷淫羊藿高效液相色谱药动学

Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 443-454页

作者： Wei Wang zi-Qing chen Yong-Qi Li Yu-Long Wang Mei-chen liu Yun-Bo Ruan Yang Zhang Shu-Juan liu Qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

Spin-glass behavior in the competing CoCrGaO_(4)cubic spinel system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 501-507页

作者： Jiyu Hu Jiangli Ni Zhenfa zi Chaocheng liu School of Physics and Materials Engineering Hefei Normal UniversityHefei 230009China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China

Spin glasses(SGs),generally defined as disordered systems with randomized competing interactions,are widely investigated complex *** the ground states of spin glasses is crucial for understanding the nature of disordered magnets and many other physical manifestations,while also helping to solve some hard combinatorial optimization problems across multiple ***,the intrinsic cause of SG has always been elusive,especially in spinel oxide ***,we report the SG behavior observed in the cubic spinel oxides CoCrGaO_(4),and provide a comprehensive understanding of its intrinsic *** results indicate a frustrated state under multi-magnetic competition,and the features of SG are confirmed by susceptibility *** fitting parameters ofτ0,T0,and zv of isothermal remanent magnetization further reveal the relaxation behavior and strong spin ***,the varying exchange coupling under different temperatures and magnetic fields is unveiled,which should be responsible for the disordered *** studies unravel the underlying mechanism responsible for doping-induced magnetic frustration and introduce CoCrGaO_(4)as a potential platform for investigating spin glass behavior,thereby advancing fundamental research on frustrated magnetism within the spinel system.

关键词： spin glass(SG) magnetic frustration magnetic competition spinel ferrites

Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： Yang liu Huopo chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China

在线全文

学校读者我要写书评

暂无评论

镀膜太赫兹聚合物管的传输特性研究

激光与红外 2014年第1期44卷 84-89页

作者：朵天波陈均刘子辰潘武重庆邮电大学光电工程学院重庆400065

设计了一种具有良好传输特性的太赫兹聚合物管。利用HFSS仿真分析太赫兹聚合物管的传输特性,其S参数较为理想,传输损耗小且传输系数大于0.96。但是太赫兹聚合物管的场分布中存在仿表面等离子体现象,这会使太赫兹聚合物管的传输特性劣化... 详细信息

设计了一种具有良好传输特性的太赫兹聚合物管。利用HFSS仿真分析太赫兹聚合物管的传输特性,其S参数较为理想,传输损耗小且传输系数大于0.96。但是太赫兹聚合物管的场分布中存在仿表面等离子体现象,这会使太赫兹聚合物管的传输特性劣化。进而,采用三种不同的镀膜方式对太赫兹聚合物管镀金属膜,发现镀膜可以有效抑制太赫兹聚合物管场分布的仿表面等离子体现象,使场分布更均匀、更稳定。并且,对比这三种镀膜方式发现内壁镀膜时太赫兹聚合物管的传输特性最优,而内外镀膜时最差。因此,太赫兹聚合物管镀膜宜优先选用内壁镀膜,可以简化工艺和降低成本。

关键词：太赫兹聚合物管仿等离子体镀膜