检索结果-南通市图书馆

维普期刊数据库博看期刊

HRB635级高强钢筋与C70高强混凝土黏结锚固性能试验研究

在线全文

学校读者我要写书评

暂无评论

沈阳建筑大学学报（自然科学版） 2024年第1期40卷 29-37页

作者：陈安英王月童蒋庆梁俊晖朱华合肥工业大学土木与水利工程学院安徽合肥230009 安徽省建筑科学研究设计院安徽合肥230031

目的研究HRB635级高强钢筋与C70高强混凝土之间黏结锚固性能,为工程应用提供参考。方法设计制作了5组45个直锚试件进行拉拔试验,分析了锚固长度、配箍率、混凝土保护层厚度等因素对锚固性能的影响。结果试件极限承载力随配箍率和锚... 详细信息

目的研究HRB635级高强钢筋与C70高强混凝土之间黏结锚固性能,为工程应用提供参考。方法设计制作了5组45个直锚试件进行拉拔试验,分析了锚固长度、配箍率、混凝土保护层厚度等因素对锚固性能的影响。结果试件极限承载力随配箍率和锚固长度的增加而增加,但当箍筋率ρsv大于1.26%,锚固长度la大于15d后,配箍率和锚固长度的增加不再对试件极限承载力产生明显的影响;对于未配置箍筋的试件,当试件保护层厚度从2d增加到3d时,试件极限承载力随着保护层厚度的增加而增加,但当保护层厚度大于3d后,保护层厚度的增加对试件极限承载力基本没有影响。结论在进行HRB635级高强钢筋和C70高强混凝土试件设计时,锚固长度可按《混凝土结构设计规范》(GB 50010-2010)中相关公式进行计算,且具有足够的安全储备。

关键词： HRB635级钢筋高强混凝土锚固性能拉拔试验

维普期刊数据库博看期刊

无铅钙钛矿纳米晶的制备及其光催化二氧化碳还原性能研究

在线全文

学校读者我要写书评

暂无评论

低碳化学与化工 2024年第5期49卷 21-27,43页

作者：李银成林介本梁俊辉郭震宁闽南科技学院通识教育学院福建泉州362000 中国计量大学材料与化学学院浙江杭州300018 华侨大学信息科学与工程学院福建厦门361021

具有优异光电性能的全无机铅卤钙钛矿是用于光催化二氧化碳还原的理想材料,但是铅的毒性和固有的不稳定性限制了其商业化应用。为此,采用反溶剂法分别制备了无铅钙钛矿材料Cs_(2)PtBr_(6)微晶和Cs_(2)PtBr_(6)纳米晶,利用SEM、TEM、XRD... 详细信息

具有优异光电性能的全无机铅卤钙钛矿是用于光催化二氧化碳还原的理想材料,但是铅的毒性和固有的不稳定性限制了其商业化应用。为此,采用反溶剂法分别制备了无铅钙钛矿材料Cs_(2)PtBr_(6)微晶和Cs_(2)PtBr_(6)纳米晶,利用SEM、TEM、XRD和紫外可见吸收光谱等方法对样品的形貌、组成和光电性能进行了表征。结果表明,将Cs_(2)PtBr_(6)微晶转化为Cs_(2)PtBr_(6)纳米晶后,样品的比表面积增大,可见光范围内的吸收性能增强,光生载流子平均寿命由Cs_(2)PtBr_(6)微晶的1.83 ns延长到Cs_(2)PtBr_(6)纳米晶的2.42 ns,并且Cs_(2)PtBr_(6)纳米晶中的平均光电流密度是Cs_(2)PtBr_(6)微晶相应值的6.4倍,Cs_(2)PtBr_(6)纳米晶的电荷转移电阻值小于Cs_(2)PtBr_(6)微晶的电荷转移电阻值,Cs_(2)PtBr_(6)纳米晶的光生载流子的分离效率和转移效率得到提高。其中,在搅拌温度为50℃时合成的Cs_(2)PtBr_(6)纳米晶具有最高的光催化活性,在反应气组成为V_(CO_(2)):V_(H_(2)):V_(N_(2))=21:63:16、总质量空速为20000 mL/(g·h)和可见光照射反应3 h的条件下,其一氧化碳的产量为74.8μmol/g,且一氧化碳选择性达到100%。以上结果可为开发高性能的光催化剂提供参考。

关键词：光催化二氧化碳还原无铅钙钛矿纳米晶

在线全文

学校读者我要写书评

暂无评论

气化炉激冷室中多相流动过程模拟与结构优化

过程工程学报 2024年第3期24卷 315-325页

作者：袁炳郭进军李晓飞梁军辉李振祥龙晓东姜从斌航天长征化学工程股份有限公司北京100010

气流床煤气化技术是煤炭清洁利用的重要手段之一,气化炉作为气流床煤气化的核心设备,通常分为燃烧室和激冷室两部分。其中,下降管-上升管结构的激冷室在煤气化装置中广泛应用。本工作采用数值模拟的方法对激冷室中的气液两相流动进行研... 详细信息

气流床煤气化技术是煤炭清洁利用的重要手段之一,气化炉作为气流床煤气化的核心设备,通常分为燃烧室和激冷室两部分。其中,下降管-上升管结构的激冷室在煤气化装置中广泛应用。本工作采用数值模拟的方法对激冷室中的气液两相流动进行研究,分析了激冷室中出现合成气从黑水管串气问题的原因,并针对串气问题提出了三种激冷室结构改进方案:延长黑水出水口(结构A);向下延长上升管(结构B);靠近黑水出口管方向,在上升管上增加挡板(结构C)。模拟结果表明三种改进方案均能够避免串气问题。此外,还对不同结构激冷室黑水池中液固两相流进行了数值模拟,研究激冷室结构对不同粒径灰渣颗粒带出率的影响,结果表明,结构C的激冷室灰渣带出率最小,其次为结构A,这两种结构方案适用于对滤饼无回收利用的情况;相比原始结构,结构B对粒径≤20μm的颗粒带出率较高,大颗粒带出率降低,更适合对滤饼中残碳回收利用的情况。

关键词：激冷室多相流串气结构优化颗粒带出率

在线全文

学校读者我要写书评

暂无评论

麻醉深度监测设备检测方法研究

计量科学与技术 2024年第5期68卷 32-36页

作者：解涛瑞马雪然陈达梁俊辉定翔中国计量科学研究院北京100029 中国计量大学杭州310018

针对麻醉深度监测设备计量检测和性能评价方法缺失的问题,提出采用临床采集的真实脑电信号评价麻醉深度指数测量结果的方法。利用自制麻醉深度监测设备检测系统,将青年和老年患者的麻醉状态脑电信号输入BIS指数、CSI指数、Ai指数等三种... 详细信息

针对麻醉深度监测设备计量检测和性能评价方法缺失的问题,提出采用临床采集的真实脑电信号评价麻醉深度指数测量结果的方法。利用自制麻醉深度监测设备检测系统,将青年和老年患者的麻醉状态脑电信号输入BIS指数、CSI指数、Ai指数等三种麻醉深度监测设备,对测量结果的一致性和重复性进行了计算和评估,分析了指数与脑电信号频谱的相关性。三种指数在反映麻醉状态变化的整体趋势上有较好的一致性,但在麻醉过渡状态和老年患者样本的情况下表现出显著差异。结果表明该方法可用于三种麻醉深度监测设备的检测,对开展麻醉深度监测设备计量质控具有一定的指导意义。

关键词：计量学麻醉深度指数脑电信号麻醉深度监测设备

Perovskite/silicon-based heterojunction tandem solar cells with 14.8%conversion efficiency via adopting ultrathin Au contact

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2017年第1期38卷 60-65页

作者： Lin Fan Fengyou Wang junhui liang Xin Yao Jia Fang Dekun Zhang Changchun Wei Ying Zhao Xiaodan Zhang Institute of Photo-Electronic Thin Film Devices and Technology of Nankai University Key Laboratory of Photo-Electronic Thin Film Devices and TechnologyTianjin 300071China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

A rising candidate for upgrading the performance of an established narrow-bandgap solar technology without adding much cost is to construct the tandem solar cells from a crystalline silicon bottom cell and a high open-circuit voltage top ***,we present a four-terminal tandem solar cell architecture consisting of a selffiltered planar architecture perovskite top cell and a silicon heterojunction bottom cell.A transparent ultrathin gold electrode has been used in perovskite solar cells to achieve a semi-transparent *** transparent ultrathin gold contact could provide a better electrical conductivity and optical reflectance-scattering to maintain the performance of the top cell compared with the traditional metal oxide *** four-terminal tandem solar cell yields an efficiency of 14.8%,with contributions of the top（8.98%）and the bottom cell（5.82%）,*** also point out that in terms of optical losses,the intermediate contact of self-filtered tandem architecture is the uppermost problem,which has been addressed in this communication,and the results show that reducing the parasitic light absorption and improving the long wavelength range transmittance without scarifying the electrical properties of the intermediate hole contact layer are the key issues towards further improving the efficiency of this architecture device.

关键词： lanar perovskite top cell silicon heterojunction bottom cell four-terminal tandem transparent ultra-thin gold electrode

Intensive management enhances mycorrhizal respiration but decreases free-living microbial respiration by affecting microbial abundance and community structure in Moso bamboo forest soils

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2024年第2期34卷 508-519页

作者： Wenhao JIN Jiangfei GE Shuai SHAO Liyuan PENG Jiajia XING Chenfei liang junhui CHEN Qiufang XU Hua QIN State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China School of Environmental and Resource Sciences Zhejiang A&F UniversityHangzhou 311300China

Intensive management is known to markedly alter soil carbon(C)storage and turnover in Moso bamboo forests compared with extensive ***,the effects of intensive management on soil respiration(RS)components remain *** study aimed to evaluate the changes in different RScomponents(root,mycorrhizal,and free-living microorganism respiration)in Moso bamboo forests under extensive and intensive management practices.A1-year in-situ microcosm experiment was conducted to quantify the RScomponents in Moso bamboo forests under the two management practices using mesh screens of varying *** results showed that the total RSand its components exhibited similar seasonal variability between the two management *** with extensive management,intensive management significantly increased cumulative respiration from mycorrhizal fungi by 36.73%,while decreased cumulative respiration from free-living soil microorganisms by 8.97%.Moreover,the abundance of arbuscular mycorrhizal fungi(AMF)increased by 43.38%,but bacterial and fungal abundances decreased by 21.65%and 33.30%,respectively,under intensive *** management practices significantly changed the bacterial community composition,which could be mainly explained by soil pH and available *** fungi and intensive management affected the interrelationships between bacterial *** equation modeling indicated that intensive management changed the cumulative RSby elevating AMF abundance and lowering bacterial *** concluded that intensive management reduced the microbial respiration-derived C loss,but increased mycorrhizal respiration-derived C loss.

关键词： arbuscular mycorrhizal fungi extensive management microbial co-occurrence network root respiration soil organic C soil respiration structural equation model

Therapeutic sponge prevents postoperative breast cancer recurrence by sustainably dissociating into CD44-targeted nanoplatform

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1792-1803页

作者： junhui Sui Mingda Zhao Zhihao Guo Jiafeng Li Jie Chen Hongli Chen Jie liang Yong Sun Xingdong Zhang Yujiang Fan National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China Beijing Tide Pharmaceutical Co. Ltd.Beijing 100176China The Key Laboratory of Biomedical Material School of Life Science and TechnologyXinxiang Medical UniversityXinxiang 453003China Coal Mining Branch China Coal Research InstituteBeijing 100028China School of Ophthalmology&Optometry Eye HospitalWenzhou Medical UniversityWenzhou 325027China

Locoregional recurrence and distant metastasis of breast cancer still pose a significant risk for patients’*** address the clinical challenge,functional absorbable sponges(HA-SH/PP-Dox/Lap/COL I(HCNPs))were constructed by biomimetic extracellular matrix of collagen I/hyaluronic acid complex conjugated with doxorubicin/lapatinib(Dox/Lap)-loaded *** HCNPs sponge exhibited excellent clotting ability and blood absorption ***,Dox/Lap-loaded nanoparticles were synchronously endowed with a large number of oligo hyaluronic acid segments after degradation,which thus enhanced the ability of targeting into CD44-overexpressed tumor *** implantable HCNPs sponge in resected cavity of postoperative 4T1 models inhibited the spread of scattered tumor cells by absorbing the inevitable *** importantly,CD44 targeted nanoparticle with suitable Dox/Lap proportion continuously released from sponge to kill tumor cells of surrounding HCNPs and those remaining at surgical margin,thus prevented local recurrence as well as distant ***,the functional HCNPs sponge might provide a safer and more effective strategy for postoperative treatment of cancer.

关键词： therapeutic sponge scattered tumor cells recurrence and metastasis CD44-targeted nanoparticles breast cancer

THE CHANGE OF THE BONE MINERAL DENSING（BMD）AND THE SERUM HORMONE LEVEL BEFORE AND AFTER WOMEN’S MENOPAUSE

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

THE CHANGE OF THE BONE MINERAL DENSING（BMD）AND THE SERUM H...

Establishing VIGS and CRISPR/Cas9 techniques to verify RsPDS function in radish

The Third International Congress on Osteoporosis

作者： liang junhui Zhao Bing Kang Qiang The first leaching hospital attached to medical college ShiHeZi University

＜正＞The BMD among 168 women,suffering from menopause aged us years old and more elder, were determined by using sd-1000 single photon absovptiometry,at the game time in the serum the change of comcentration of the estradiol（E）,the testosterone（T）,the growth hormone（GH）,the luteinizing hormone（LH）I,and the Follicl stimulating hormone（FSH）was observed using radioimmunoassay（R|A）,the interrelation to menopause age and the profession was also sarveged,192 healthy female aged 13-44were chosen as the contrast group,the other 168 women aged 45-82（they were in menopause female）.among them there were cadres,teachers,workers,peasants,pensioners,*** determination proceeded in

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第5期23卷 1557-1567页

作者： Jiali Ying Yan Wang liang Xu Tiaojiao Qin Kai Xia Peng Zhang Yinbo Ma Keyun Zhang Lun Wang junhui Dong Lianxue Fan Yuelin Zhu Liwang Liu National Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization/Key Laboratory of Horticultural Crop Biology and Genetic Improvement(East China)of Ministry of Agriculture and Rural Affairs/College of Horticulture Nanjing Agricultural UniversityNanjing210095China College of Horticulture and Landscape Architecture Yangzhou UniversityYangzhou 225009China College of Life Sciences Nanjing Agricultural UniversityNanjing 210095China

Virus-induced gene silencing(VIGS)and clustered regularly interspaced short palindromic repeats/CRISPR-associated protein(CRISPR/Cas)systems are effective technologies for rapid and accurate gene function verification in modern plant ***,the investigation of gene silencing and editing in radish remains *** this study,a bleaching phenotype was generated through the knockdown of RsPDS using tobacco rattle virus(TRV)-and turnip yellow mosaic virus(TYMV)-mediated gene silencing *** TYMV-mediated gene silencing efficiency was higher than the TRV-based VIGS system in *** expression level of RsPDS was significantly inhibited using VIGS in'NAU-067'radish *** rootless seedlings of‘NAU-067'were infected with Agrobacterium rhizogenes using the 2300GN-Ubi-RsPDS-Cas9 vector with two target *** adventitious roots were blue with GUs staining,and four of these adventitious roots were edited at target sequence 1 of the RsPDS gene as indicated by Sanger ***,albino lines were generated with ***-mediated transformation of radish *** base substitutions and three base deletions occurred at target sequence 2 in Line 1,and three base insertions and three base substitutions occurred at target sequence 1 in Line *** study shows that VIGS and CRISPR/Cas9 techniques can be employed to precisely verify the biological functions of genes in radish,which will facilitate the genetic improvement of vital horticultural traits in radish breeding programs.

关键词： Raphanus sativus L. VIGS CRISPR/Cas9 Agrobacterium rhizogenes A.tumefaciens RsPDS