检索结果-南通市图书馆

Intrinsic superconducting transport properties of ultra-thin Fe_(1+y)Te_(0:6)Se_(0:4) microbridges

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2017年第11期60卷 76-80页

作者： HanCong Sun YangYang Lv dachuan Lu ZhiBao Yang XianJing Zhou LuYao Hao XiangZhuo Xing Wei Zou Jun Li ZhiXiang Shi WeiWei xu HuaBing Wang PeiHeng Wu Research Institute of Superconductor Electronics Nanjing University National Institute for Materials Science Department of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast University Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China

We investigated the superconducting properties of Fe_(1+y)Te_(0:6)Se_(0:4) single-crystalline microbridges with a width of 4 m and thicknesses ranging from 20.8 to 136.2 nm. The temperature-dependent in-plane resistance of the bridges exhibited a type of metalinsulator transition in the normal state. The critical current density(J_c) of the microbridge with a thickness of 136.2 nm was82.3 kA/cm^2 at 3K and reached 105 kA/cm^2 after extrapolation to T = 0 K. The current versus voltage characteristics of the microbridges showed a Josephson-like behavior with an obvious hysteresis. These results demonstrate the potential application of ultra-thin Fe-based microbridges in superconducting electronic devices such as bolometric detectors.

关键词： Fe-based superconductor critical current density metal-insulator-transition

Disentangling the effects of topography and space on the distributions of dominant species in a subtropical forest

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第35期59卷 5113-5122页

作者： Qinggang Wang Yaozhan xu Zhijun Lu dachuan Bao Yili Guo Junmeng Lu Kuihan Zhang Haibo Liu Hongjie Meng Xiujuan Qiao Handong Huang Mingxi Jiang Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of Sciences University of Chinese Academy of Sciences

Topography and space are two important factors determining plant species assemblages in forest *** of the contribution of these two factors in determining species distribution helps us to evaluate their relative importance in determining species *** study aims to disentangle the effect of topography and space on the distributions of 14 dominant species in a subtropical mixed *** correlation analysis and the torustranslation test were used to test the species–habitat *** partitioning was used to quantify the relative contributions of topography and space at three sampling scales and three life *** analyses and torus-translation tests showed species abundance was mostly correlated with topographic wetness index,vertical distance from the channel network and *** partitioning showed that pure topography,pure space and spatially structured topography explained about 2.1 %,41.2 % and 13.8 %of the variation in species distributions,*** nine species,total topography fractions peaked in 20 m *** ten species,the pure space fractions peaked in 50 m *** many species,the total topography fraction andthe pure space fraction were larger for the most abundant life stages,which reflected the importance of sampling ***,some cases did not follow this trend suggesting that the effects of ecological processes such as habitat filtering,density dependence or dispersal limitation may exceed the sampling *** conclusion,we found that spatially structured topography and pure space primarily shaped the distribution of dominant tree ***,their effects were both scale- and life stage-dependent.

关键词：亚热带森林和空间优势种地形物种分布相关分析方差分解物种丰富度

第一趾蹼间结构层次与血管的关系及其临床意义

在线全文

学校读者我要写书评

暂无评论

中华手外科杂志 1999年第1期15卷 50-52页

作者：徐永清钟世镇徐达传李主一李忠华石瑾第一军医大学临床解剖学研究所昆明总医院全军骨科中心

目的探讨第一趾蹼间血管神经与第一跖骨深横韧带、伸肌扩张部的关系。方法在４２侧成人下肢尸体标本上，观测第一跖骨深横韧带、伸肌扩张部的起止形态，以及与第一跖背动脉、第一跖底动脉的关系。结果第一跖骨深横韧带分为跖层和背层。... 详细信息

目的探讨第一趾蹼间血管神经与第一跖骨深横韧带、伸肌扩张部的关系。方法在４２侧成人下肢尸体标本上，观测第一跖骨深横韧带、伸肌扩张部的起止形态，以及与第一跖背动脉、第一跖底动脉的关系。结果第一跖骨深横韧带分为跖层和背层。Ⅰ、Ⅱ型第一跖背动脉的远端段位于伸肌扩张部的浅面，第一跖底动脉远端段恒定地位于第一跖骨深横韧带跖层的深面。结论寻找第一跖背动脉远端段时，应在伸肌扩张部的浅面解剖；寻找第一跖底动脉远端段时，应在第一跖骨深横韧带跖层的深面解剖。

关键词：韧带小动脉跖骨解剖学

Co-infections of SARS-CoV-2 with multiple common respiratory pathogens in infected patients

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2020年第4期63卷 606-609页

作者： dachuan Lin Lei Liu Mingxia Zhang Yunlong Hu Qianting Yang Jiubiao Guo Yongchao Guo Youchao Dai Yuzhong xu Yi Cai Xinchun Chen Zheng Zhang Kaisong Huang Guangdong Provincial Key Laboratory of Regional Immunity and Disease Department of Pathology BiologySchool of MedicineShenzhen UniversityShenzhen 518060China National Clinical Research Center for Infectious Diseases Guangdong Key Lab for Diagnosis&Treatment of Emerging Infectious DiseasesShenzhen Third People’s HospitalSouthern University of Science and TechnologyShenzhen 518112China Department of Clinical Laboratory Shenzhen Baoan HospitalThe Second Affiliated Hospital of Shenzhen UniversityShenzhen 518071China

Dear Editor,In late December 2019,an outbreak of severe pneumonia caused by an unknown etiological agent was initially reported in Wuhan,China,and then quickly spread throughout China and even abroad(Zhu et al.,2020).Swift control measures and etiological investigations were conducted by the Chinese government,physicians and researchers,and by using high throughput sequencing and virological testing,the mysterious pneumonia pathogen was shown to be a novel coronavirus(SARS-CoV-2)capable of person-to-person transmission(Zhu et al.,2020).Coronaviruses are a group of non-segmented,enveloped and positive-sense RNA viruses that belong to the subfamily of Coronavirinae in the family of Coronavirdiae and order of Nidovirales.

关键词： initially Swift envelope

Effects of topography on structuring species assemblages in a subtropical forest

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2017年第3期10卷 440-449页

作者： Qinggang Wang Ruwan Punchi-Manage Zhijun Lu Scott B.Franklin Zhiheng Wang Yaoqi Li Xiulian Chi dachuan Bao Yili Guo Junmeng Lu Yaozhan xu Xiujuan Qiao Mingxi Jiang Key Laboratory of Aquatic Botany and Watershed Ecology Chinese Academy of SciencesWuhanHubei 430074PR China Department of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871PR China Department of Ecosystem Modeling University of GöttingenBüsgenweg 437077 GöttingenGermany Department of Ecological Modelling UFZ Helmholtz Centre for Environmental Research-UFZPF 50013604301 LeipzigGermany School of Biological Sciences University of Northern ColoradoGreeleyCO 80639-0017USA National Resource Center for Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700PR China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049PR China

Aims Topography has long been recognized as an important factor in shaping species *** studies revealed that species may show species-habitat ***,few studies inves-tigate how species assemblages are associated with local habitats,and it still remains unclear how the community-habitat associa-tions vary with species abundance class and life *** this study,we analyzed the community-habitat associations in a subtropical montane *** The fully mapped 25-ha(500×500 m)forest plot is located in Badagongshan Nature Reserve in Hunan Province,Central *** was divided into 625(20×20 m)*** types were classified by multivariate regression tree analyses that cluster areas with similar species composition according to the topographic *** species analysis was used to identify the most important species for structuring species *** also compared the community-habitat associations for two levels of species abundances(*** and rare)and three different life stages(***,juveniles and adults),while accounting for sample size *** Findings The Badagongshan plot was divided into five distinct habitat types,which explained 34.7%of the variance in tree species *** with sample size taken into account,community-habi-tat associations for rare species were much weaker than those for abundant *** when accounting for sample size,very small differences were found in the variance explained by topography for the three life *** species of habitat types were mainly abundant species,and nearly all adult stage indicator species were also indicators in juvenile and sapling *** study manifested that topographical habitat filtering was important in shaping over-all local species ***,habitat filtering was not important in shaping rare species’distributions in this *** community-habitat association patterns in this fores

关键词： multivariate regression tree analysis habitat filtering rare species Badagongshan

基于气化智能平台的多源含碳固废协同气化探索和实践

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

大氮肥 2024年第5期47卷 289-293页

作者：王芳杰刘艳芳王树青王大川李丹阳夏国富徐润中石化石油化工科学研究院有限公司北京100083

“双碳”背景下,多源固废与煤协同气化既是固废减量化的有效手段,也是提高煤气化炉功能性的措施。从建立气化智能平台入手,探索将石油焦、油泥、农林废弃物等含碳固废通过与煤共气化,从而实现废物利用的途径。通过建立煤、石油焦等多源... 详细信息

“双碳”背景下,多源固废与煤协同气化既是固废减量化的有效手段,也是提高煤气化炉功能性的措施。从建立气化智能平台入手,探索将石油焦、油泥、农林废弃物等含碳固废通过与煤共气化,从而实现废物利用的途径。通过建立煤、石油焦等多源气化原料性质数据库,对原料性质进行研判和数据集中管理,结合配煤专家系统为不同类型的气化炉提供二元或三元气化原料的优化配伍方案。解决了协同气化配伍方案因缺乏理论依据难确定、废物成分复杂易影响合成气产量及气化炉安全平稳运行等问题。对多源固废协同气化的可行性进行了探索,并将研究结果应用于企业实践。

关键词：多源固废协同气化气化智能平台气化原料性质数据库配煤专家系统

在线全文

学校读者我要写书评

暂无评论

特殊形式穿支皮瓣及其衍生术式命名专家共识

中华显微外科杂志 2022年第1期45卷 5-13页

作者：唐举玉徐达传徐永清汪华侨朱庆棠张世民章一新王欣丁小珩芮永军赵广跃徐雷战杰刘元波陶凯魏在荣任高宏谢振军谢松林郭峰李赞刘鸣江刘俊吴攀峰俞芳卿黎明周征兵张兴尹路陶友伦郑晓菊穆广态唐茂林顾立强刘小林侯春林中南大学湘雅医院骨科-手显微外科长沙410008 南方医科大学临床解剖研究所广州510515 解放军联勤保障部队第九二○医院骨科昆明650032 《中华显微外科杂志》编辑部广州510062 中山大学附属第一医院显微创伤手外科广州510080 同济大学附属杨浦医院骨科上海200292 上海交通大学医学院附属第九人民医院整复外科上海200011 宁波市第六医院手外科浙江宁波315040 海军第九七一医院手外科山东青岛266071 无锡市第九人民医院江苏无锡214062 空军军医大学附属西京医院西安710032 复旦大学华山医院手外科上海200000 沈阳医学院附属中心医院手外科沈阳110024 中国医学科学院整形外科医院整形外科北京100144 北部战区总医院整形外科沈阳110011 遵义医科大学附属医院整形外科贵州遵义563003南方医科大学南方医院骨科广州510515 河南省人民医院手显微外科郑州450003 南华大学附属南华医院手外科湖南衡阳421000 中南大学湘雅医院口腔颌面外科长沙410008 湖南省肿瘤医院长沙410013 南华大学附属长沙市中心医院手显微外科长沙410004 郴州市第一人民医院骨科湖南郴州423000 上海交通大学附属第六人民医院修复重建外科上海201306 河南平顶山骨伤科医院河南平顶山467021 天津医院手显微外科天津300231 徐州市中心医院江苏徐州221009 西安凤城医院西安710016 武警宁夏总队医院银川750000 温州医科大学人体解剖学教研室浙江温州325027 海军军医大学长征医院骨科上海200003

穿支皮瓣是在传统轴型皮瓣基础上发展而来,以穿支血管供血,仅包括皮肤与浅筋膜组织的一种新型皮瓣,由于改变了深筋膜血管网是皮瓣赖以生存的传统观点,使皮瓣设计和形成更具灵活性和多样性[1-3].2012年唐举玉[4]在国际上首次提出的特殊... 详细信息

穿支皮瓣是在传统轴型皮瓣基础上发展而来,以穿支血管供血,仅包括皮肤与浅筋膜组织的一种新型皮瓣,由于改变了深筋膜血管网是皮瓣赖以生存的传统观点,使皮瓣设计和形成更具灵活性和多样性[1-3].2012年唐举玉[4]在国际上首次提出的特殊形式穿支皮瓣是应用传统穿支皮瓣的"微创与美学"理念、根据受区修复要求对皮瓣供区的一级源血管及其分支和相应供养的组织(皮肤、筋膜、肌肉、骨组织)进行优化设计、无创解剖、分割和重组,根据受区创面重建需要切取不同组织块(嵌合)或相同组织块(分叶),然后再削薄、组装、拼接成与受区创面内容、形状及血液循环重建要求相匹配的新型皮瓣.特殊形式穿支皮瓣是传统穿支皮瓣的衍生和发展,是穿支皮瓣的更高形式,丰富了穿支皮瓣的内涵,扩大了穿支皮瓣的适应证[5-13].

关键词：浅筋膜骨组织修复要求专家共识

在线全文

学校读者我要写书评

暂无评论

冶金法制备多晶Si杂质去除效果研究

特种铸造及有色合金 2007年第9期27卷 730-732页

作者：徐云飞谭毅姜大川许富民三束材料改性国家重点实验室大连理工大学材料科学与工程学院

采用电子束熔炼以及定向凝固对纯度为98.8%的工业Si进行提纯,研究电子束对Si中各种杂质的去除效果,以及定向凝固对金属杂质的去除效果。结果表明,电子束对Si中的各种主要杂质都有一定的去除效果,对P元素和Ca元素尤为明显,电子束熔炼可... 详细信息

采用电子束熔炼以及定向凝固对纯度为98.8%的工业Si进行提纯,研究电子束对Si中各种杂质的去除效果,以及定向凝固对金属杂质的去除效果。结果表明,电子束对Si中的各种主要杂质都有一定的去除效果,对P元素和Ca元素尤为明显,电子束熔炼可将其去除90%以上,定向凝固对Fe、Al、Ca等金属杂质的去除效果比较好。一次定向凝固可使Si中的Fe含量降到0.0001%以下。

关键词：电子束定向凝固太阳能级Si 杂质

Mannitol inhibits the proliferation of neural stem cell by a p38 mitogen-activated protein kinase-dependent signaling pathway

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Traumatology 2024年第1期27卷 42-52页

作者： Hai-Zhen Duan Xin Zhou Quan Hu Meng-Long Liu Shu-Hong Wang Ji Zhang xu-Heng Jiang Tian-Xi Zhang An-Yong Yu Department of Emergency Affiliated Hospital of Zunyi Medical UniversityZunyi563000Guizhou provinceChina Dazhou Vocational College of Chinese Medicine Dazhou635000Sichuan provinceChina dachuan District Traditional Chinese Medicine Hospital Dazhou635000Sichuan provinceChina

Purpose:Mannitol is one of the first-line drugs for reducing cerebral edema through increasing the extracellular osmotic ***,long-term administration of mannitol in the treatment of cerebral edema triggers damage to neurons and *** that neural stem cell(NSC)is a subpopulation of main regenerative cells in the central nervous system after injury,the effect of mannitol on NSC is still *** present study aims to elucidate the role of mannitol in NSC ***:C57 mice were derived from the animal house of Zunyi Medical University.A total of 15 pregnant mice were employed for the purpose of isolating NSCs in this ***,mouse primary NSCs were isolated from the embryonic cortex of mice and subsequently identified through immunofluorescence *** order to investigate the impact of mannitol on NSC proliferation,both cell counting kit-8 assays and neurospheres formation assays were *** vitro effects of mannitol were examined at various doses and time *** order to elucidate the role of Aquaporin 4(AQP4)in the suppressive effect of mannitol on NSC proliferation,various assays including reverse transcription polymerase chain reaction,western blotting,and immunocytochemistry were conducted on control and mannitol-treated ***,the phosphorylated p38(p-p38)was examined to explore the potential mechanism underlying the inhibitory effect of mannitol on NSC ***,to further confirm the involvement of the p38 mitogen-activated protein kinase-dependent(MAPK)signaling pathway in the observed inhibition of NSC proliferation by mannitol,SB203580 was *** data were analyzed using SPSS 20.0 software(SPSS,Inc.,Chicago,IL).The statistical analysis among multiple comparisons was performed using one-way analysis of variance(ANOVA),followed by Turkey’’s post hoc test in case of the data following a normal distribution using a Shapiro-Wilk normality *** betwe

关键词： Mannitol Cerebral edema Neural stem cell Proliferation AQP4 p38 MAPK signaling pathway