检索结果-南通市图书馆

Corrosion and Cavitation Erosion Behaviours of Cast Nickel Aluminium Bronze in 3.5% NaCl Solution with Different Sulphide Concentrations

引用

Acta Metallurgica Sinica(English Letters) 2019年第12期32卷 1470-1482页

作者： Qi-Ning Song Nan Xu yao tong Chen-Ming Huang Shou-Yu Sun Chen-Bo Xu Ye-Feng Bao Yong-Feng Jiang Yan-Xin Qiao Zhi-Yuan Zhu Zheng-Bin Wang College of Mechanical and Electrical Engineering Hohai University200 Jinling North RoadChangzhou 213022China College of Materials Science and Engineering Jiangsu University of Science and Technology2 Mengxi RoadZhenjiang 212003China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences62 Wencui RoadShenyang 110016China

The effect of sulphide(Na2S)concentration(SC)on the corrosion and cavitation erosion behaviours of a cast nickel aluminium bronze(NAB)in 3.5% NaCl solution is investigated in this *** results show that when the SC exceeds 50 ppm,the hydrogen evolution reaction dominates the cathodic process,and a limiting current region appears in the anodic branch of the polarisation curve due to the formation of a copper sulphide film,which is a diffusion-controlled *** longterm immersion,the increased mass loss rate of NAB with the sulphide additions of 20 and 50 ppm is attributed to the less protective films,which contains a mixture of copper oxides and ***,NAB undergoes severe localised corrosion(selective phase corrosion,SPC)at the β’phases and eutectoid microstructureα+κⅢ.By comparison,NAB undergoes general corrosion and a copper sulphide film is formed in 100 and 200 ppm sulphide *** erosion greatly increases the corrosion rate of NAB in all solutions and causes a negative potential shift in 3.5%NaCl solution due to the film ***,a positive potential shift occurs in the solutions with SC higher than 50 ppm due to the accelerated mass transfer of the cathodic *** cavitation erosion mass loss rate of NAB increases with the increase of *** occurrence of severe SPC decreases the phase boundary cohesion and causes brittle fracture under the cavitation *** corrosion-enhanced erosion is the most predominant factor for the cavitation erosion damage when the SC exceeds 50 ppm.

关键词： Nickel aluminium bronze Sulphide Corrosion Cavitation erosion Synergy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on Durability of Recycled Aggregate Concrete in High-Temperature and Complex Environments

引用

Journal of World Architecture 2024年第5期8卷 66-71页

作者： Xiaoqing Hu yao tong Xuan Min Rongchong Xu Chongqing Institute of Engineering Chongqing 400056China

Recycled aggregate concrete refers to a new type of concrete material made by processing waste concrete materials through grading,crushing,and cleaning,and then mixing them with cement,water,and other materials in a certain gradation or *** type of concrete is highly suitable for modern construction waste disposal and reuse and has been widely used in various construction *** can also be used as an environmentally friendly permeable brick material to promote the development of modern green ***,practical applications have found that compared to ordinary concrete,the durability of this type of concrete is more susceptible to high-temperature and complex *** on this,this paper conducts theoretical research on its durability in high-temperature and complex environments,including the current research status,existing problems,and application prospects of recycled aggregate concrete’s durability in such *** is hoped that this analysis can provide some reference for studying the influence of high-temperature and complex environments on recycled aggregate concrete and its subsequent application strategies.

关键词： Recycled aggregate concrete Construction engineering High-temperature and complex environment Durability

来源：

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

Application Strategies of Pipe Jacking Technology in Municipal Rainwater Pipeline Engineering

引用

Journal of Architectural Research and Development 2024年第6期8卷 5-10页

作者： yao tong Xiaoqing Hu Yuwenhui Guo Minjun Gao Chongqing Institute of Engineering Chongqing 400056China

Traditional construction techniques have a significant impact on the environment and are associated with long construction durations in the construction of municipal rainwater *** jacking technology,a new type of pipeline construction method,enables non-excavation construction and can address the shortcomings of traditional pipeline *** article analyzes the concept and application advantages of pipe jacking *** engineering examples,it explores the application strategies of pipe jacking technology in the construction process of municipal rainwater pipelines for reference.

关键词： Municipal engineering Rainwater pipeline Pipe jacking construction

来源：

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

基于TOPSIS方法的高校体育教师胜任力研究

引用

数学的实践与认识 2016年第20期46卷 289-296页

作者：姚桐上海海事大学文理学院体育部上海201306

高校体育教师与其他学科教师相比具有不同的行为特质,因而导致高校体育教师的努力程度很难准确地测量.为了解决科学地评价高校体育教师胜任力的问题,在层次分析法(AHP)和逼近理想解的排序法(TOPSIS)两类方法的基础上,构建了AHP—TOPSIS... 详细信息

高校体育教师与其他学科教师相比具有不同的行为特质,因而导致高校体育教师的努力程度很难准确地测量.为了解决科学地评价高校体育教师胜任力的问题,在层次分析法(AHP)和逼近理想解的排序法(TOPSIS)两类方法的基础上,构建了AHP—TOPSIS综合评判指标体系模型.根据该方法比较突出的特点,考虑到决策者对评价指标权重的不同,对TOPSIS方法加以改进;再将改进后的方法运用到对3类高校体育教师的胜任力进行综合评判.从工作态度、知识—技能、课程设置、创新能力以及合作能力5个方面综合量化高校体育教师的胜任力,旨在为组织全面评价以及甄选高校体育教师人才提供一种切实可行的科学方法.

关键词：层次分析法逼近理想解的排序法胜任力

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

风险投资、创新与创新累积效应——基于系统GMM估计的动态面板分析

引用

软科学 2011年第6期25卷 6-10页

作者：邵同尧上海财经大学公共经济与管理学院浙江农林大学经济与管理学院

基于省级动态面板数据构建了省域的创新投入产出经验模型,利用系统GMM方法,实证分析了我国27个省市的风险投资等因素对创新产出的影响。结果表明,创新具有累积效应,风险投资、研发对创新具有促进作用,并且研发的作用高于风险投资。同时... 详细信息

基于省级动态面板数据构建了省域的创新投入产出经验模型,利用系统GMM方法,实证分析了我国27个省市的风险投资等因素对创新产出的影响。结果表明,创新具有累积效应,风险投资、研发对创新具有促进作用,并且研发的作用高于风险投资。同时,工资、开放度和教育水平都会有利于地区的创新,但经济发展水平对商标有一定的负作用。

关键词：风险投资研发区域创新商标

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Three-dimensional bioprinting collagen/silk fibroin scaffold combined with neural stem cells promotes nerve regeneration after spinal cord injury

引用

Neural Regeneration Research 2020年第5期15卷 959-968页

作者： Ji-Peng Jiang Xiao-Yin Liu Fei Zhao Xiang Zhu Xiao-Yin Li Xue-Gang Niu Zi-tong yao Chen Dai Hui-You Xu Ke Ma Xu-Yi Chen Sai Zhang Department of Thoracic Surgery General Hospital of People’s Liberation Army (PLA)BeijingChina Tianjin Key Laboratory of Neurotrauma Repair Institute of Traumatic Brain Injury and NeuroscienceCenter for Neurology and Neurosurgery of Chinese People’s Armed Police Force (PAP) Medical CenterTianjinChina Tianjin Medical University TianjinChina Department of Neurology Luoyang First Hospital of Traditional Chinese MedicineLuoyangHenan ProvinceChina Department of Neurosurgery Fourth Central Hospital of TianjinTianjinChina

Many studies have shown that bio-scaffolds have important value for promoting axonal regeneration of injured spinal ***,cell transplantation and bio-scaffold implantation are considered to be effective methods for neural *** study was designed to fabricate a type of three-dimensional collagen/silk fibroin scaffold (3D-CF) with cavities that simulate the anatomy of normal spinal *** scaffold allows cell growth in vitro and in *** observe the effects of combined transplantation of neural stem cells (NSCs) and 3D-CF on the repair of spinal cord *** Sprague-Dawley rats were divided into four groups: sham (only laminectomy was performed),spinal cord injury (transection injury of T10 spinal cord without any transplantation),3D-CF (3D scaffold was transplanted into the local injured cavity),and 3D-CF + NSCs (3D scaffold co-cultured with NSCs was transplanted into the local injured ***,imaging,hematoxylin-eosin staining,argentaffin staining,immunofluorescence staining,and western blot assay were *** from the sham group,neurological scores were significantly higher in the 3D-CF + NSCs group compared with other ***,latency of the 3D-CF + NSCs group was significantly reduced,while the amplitude was significantly increased in motor evoked potential *** results of magnetic resonance imaging and diffusion tensor imaging showed that both spinal cord continuity and the filling of injury cavity were the best in the 3D-CF + NSCs ***,regenerative axons were abundant and glial scarring was reduced in the 3D-CF + NSCs group compared with other *** results confirm that implantation of 3D-CF combined with NSCs can promote the repair of injured spinal *** study was approved by the Institutional Animal Care and Use Committee of People’s Armed Police Force Medical Center in 2017 (approval No.2017-0007.2).

关键词： 3D bioprinting collagen diffusion tensor imaging functional recovery magnetic resonance imaging nerve regeneration neural regeneration neural stem cell scaffold silk fibroin spinal cord injury

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced multimodal luminescence and ultrahigh stability Eu^(3+)-doped CsPbBr_(3) glasses for X-ray detection and imaging

引用

Photonics Research 2021年第12期9卷 2369-2380页

作者： yao tong QIN WANG HENG YANG XIAOTING LIU ENROU MEI XIAOJUAN LIANG ZHIJUN ZHANG WEIDONG XIANG College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

As an emerging scintillation material,metal halide perovskite(CsPbX3)has been deemed the most potentially valuable candidate in X-ray detection and medical ***,it is a continuing challenge to implement efficient radioluminescence(RL)with high radiation stability and moisture ***,the optimized luminescence properties and excellent uniformity of CsPbX3 glass are also key points for obtaining perfect X-ray ***,we have successfully precipitated Eu^(3+)-doped CsPbBr_(3)nanocrystals(NCs)with improved photoluminescence quantum yield(≈58.6%)because partial Eu^(3+)entered the perovskite lattice in a robust borosilicate glass matrix by in situ *** small amount of Eu addition made the lattice of NCs shrink and promoted uniform distribution of CsPbBr_(3)NCs in the glass,which effectively reduced the light scattering of the ***,multimodal RL intensity of the CsPbBr_(3)/CsPbBr_(3):xEu NCs glasses(CPB-0Eu/CPB-xEu)as a function of X-ray dose rate showed a superlinear relationship to the benefit of obtaining satisfactory X-ray ***,the outstanding radiation stability and water resistance of CPB-xEu were confirmed due to the protection of the robust glass ***,an X-ray imaging system using a CPB-xEu scintillator was constructed,and the spring in the opaque sample was legibly detected under the motivation of X-rays,indicating that CsPbX3 glasses possess extensive application prospects in terms of X-ray detection and medical imaging.

关键词： luminescence stability modal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Neoadjuvant endocrine therapy: A potential strategy for ER-positive breast cancer

引用

World Journal of Clinical Cases 2019年第15期7卷 1937-1953页

作者： Li-tong yao Mo-Zhi Wang Meng-Shen Wang Xue-Ting Yu Jing-Yi Guo Tie Sun Xin-Yan Li Ying-Ying Xu Department of Breast Surgery the First Affiliated Hospital of China Medical University

A potential strategy for patients with estrogen receptor(ER)-positive breast cancer is necessary to replace neoadjuvant chemotherapy which has limited *** endocrine therapy(NAE)has been indicated to be a favorable alternate approach to downstage large or locally advanced breast cancer in ER-positive,human epidermal growth factor receptor 2(HER2)-negative(ER+/HER2-)patients,especially postmenopausal *** studies have demonstrated the efficacy of various endocrine agents in *** inhibitors(AIs)have proven superiority over tamoxifen as a suitable choice to optimize treatment *** was recently reported as an effective agent,similar to ***,the addition of targeted agents exerts synergistic antiproliferative effects with endocrine agents and rapidly improves response rates in both endocrine sensitive and resistant *** neoadjuvant platform provides a unique opportunity to define the appropriate strategy and address the mechanisms of endocrine *** addition,the predictive value of biomarkers and genomic assays in NAE is under investigation to evaluate individual effects and validate biomarker-based *** this review,we discuss the most relevant evidence on the potential of NAE for ER+breast *** current understanding also offers new insights into the identification of the optimal settings and valuable predictive tools of NAE to guide clinical treatment decisions and achieve beneficial therapeutic effects.

关键词： Breast cancer Neoadjuvant endocrine therapy Neoadjuvant chemotherapy Aromatase inhibitor Palbociclib Ki67 Genomic assay

来源：

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

Future changes in thermal comfort conditions over China based on multi-RegCM4 simulations

引用

Atmospheric and Oceanic Science Letters 2018年第4期11卷 291-299页

作者： GAO Xue-Jie WU Jie SHI Ying WU Jia HAN Zhen-Yu ZHANG Dong-Feng tong yao LI Rou-Ke XU Ying GIORGI Filippo Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina National Climate Center China Meteorological AdministrationBeijingChina Shanxi Climate Center TaiyuanChina Gaizhou Meteorological Bureau YingkouChina The Abdus Salam International Center for Theoretical Physics TriesteItaly

A set of high resolution(25 km)21st century climate change projections using the regional climate model RegCM4 driven by four global model simulations were conducted over East Asia under the mid-range RCP4.5 *** the present paper,the authors investigate the change in thermal comfort conditions over china based on an ensemble of the projections,using the index of effective temperature(ET),which considers the aggregate effects of temperature,relative humidity,and wind on human thermal *** analysis also accounts for exposure as measured by distributed population amount *** authors find that the general increase in ET leads to a large increase in population exposure to very hot days(a China-aggregated sixfold increase in‘person-days’by the end of the 21st *** is a decrease in cool,cold,and very cold ***,a decrease in comfortable day conditions by 22%person-days is found despite an increase in climate-based comfortable *** of the different contributions to the changes(climate,population,and interactions between the two)show that climate effects play a more important role in the hot end of the thermal comfort categories,while the population effects tend to be dominant in the cold ***,overall,even a mid-level warming scenario is found to increase the thermal stress over China,although there is a strong geographical *** inclusion of population exposure strongly modulates the climateonly signal,which highlights the need for including socioeconomic factors in the assessment of risks associated with climate change.

关键词： Thermal comfort conditions RegCM climate change population

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Calcineurin is involved in cardioprotection induced by ischemic postconditioning through attenuating endoplasmic reticulum stress

引用

Chinese Medical Journal 2011年第20期124卷 3334-3340页

作者： CHEN Yi-hong WU Xu-dong yao Shu-tong SUN Seng LIU Xiu-hua Department of Pathophysiology Chinese People＇s LiberationArmy General Hospital Beijing 100853 China

Background Ischemic postconditioning （I-postC） is a newly discovered and more amenable cardioprotective strategy capable of protecting the myocardium from ischemia/reperfusion （I/R） injury. Endoplasmic reticulum （ER） is a principal site for secretary protein synthesis and calcium storage. Myocardial I/R causes ER stress and emerging studies suggest that the cardioprotection has been linked to the modulation of ER stress. The aim of the present study was to determine whether cardioprotection of I-postC involves reduction in ER stress through calcineurin pathway. Methods In the in vivo model of rat myocardial I/R, myocardial infarct size was measured by triphenyltetrazolium chloride （TTC） staining and apoptosis was detected using terminal eoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling （TUNEL） assay. Expression of calreticulin, C/EBP homologous protein （CHOP）, caspase-12, and activation of caspase-12 in myocardium were detected by Western blotting. The activity and expression of calcineurin in myocardium were also detected. Results I-postC protected the I/R heart against apoptosis, myocardial infarction, and leakage of lactate dehydrogenase （LDH） and creatine kinase-MB （CK-MB）. I-postC suppressed I/R-induced ER stress, as shown by a decrease in the expression of calreticulin and CHOP, and caspase-12 activation. I-postC downregulated calcineurin activation in myocardium subjected to I/R. Conclusion I-postC protects myocardium from I/R injury by suppressing ER stress and calcineurin pathways are not associated with the I-postC-induced suppression of ER stress-related apoptosis.

关键词： ischemic postconditioning endoplasmic reticulum stress calcineurin rats myocardial infarction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：