检索结果-南通市图书馆

Compressive Strength Development and Microstructure of Cement-asphalt Mortar

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 998-1003页

作者：王强阎培渝 Department of Civil Engineering Tsinghua University

The compressive strength developing process and the microstructure of cement-asphalt mortar （CA mortar） were *** fluidity of CA mortar has a great influence on its *** optimum value of spread diameter of slump flow test is in the range of 300 to 400 *** compressive strength of CA mortar keeps a relatively high growth rate in 56 days and grows slowly *** residual water of hydration in CA mortar freezes under minus environmental temperature which can lead to a significant reduction of the strength of CA *** A/C retards asphalt emulsion splitting and thus prolongs the setting process of CA *** hydration products of cement form the major structural framework of hardened CA mortar and asphalt is a weak phase in the framework but improves the viscoelastic behavior of CA ***,asphalt emulsion should be used as much as possible on the condition that essential performance criterions of CA mortar are satisfied.

关键词： asphalt emulsion compressive strength CA mortar microstructure

Study on Quality Improvement Effect and Separate Character of Soybean Male Sterile (MS1) Recurrent Selection Population

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2007年第5期6卷 545-551页

作者： ZHAO Shuang-jin ZHANG Meng-chen JIANG Chun-zhi yanG Chun-yan LIU Bing-qiang CUI Jue Institute of Food and Oil Crops Hebei Academy of Agricultural and Forestry Sciences~National Soybean Improvement Center ShijiazhuangSub-Center Shijiazhuang 050031 P.R.China

To solve the problem that soybean has narrow genetic base, we constructed a series of male sterile recurrent selection populations, and studied the effects of quality improvement and practical value. An LD-base population, which fits to our ecology type was constructed by 6 years＇ gene enrichment through the introduction of new genes from 23 local varieties and recurrent selection. The LD-base populations were then improved by making crosses with high protein and high oil genotypes. As a result we obtained a high protein sub-population （db） and a high oil sub-population （gy）, For the db sub-population, the protein content is 1.18% higher than the base population, 22.38% of the individuals contain 45% or more of protein, which is 10.99% higher than the base population. For the gy sub-population, oil content is 0.24% higher than the base population. Individuals with oil content of 20% or more are 11.05% higher than the base population. The quantitative characters such as flowering date, mature date, pod habit, and hilum color, etc., all showed wide range of separation, and the segregation ratio approached balance. The c.v. of branch number of ms1 recurrent population （72.8%） is higher than general cross-population （57.3%）, and the c.v. of 100 seed weight of ms1 （18.1%） is higher than general cross population （16.5%）, the coefficient of variation of plant height, pods per plant, and seeds per pod were not significantly different. It was demonstrated in this paper that the quality character of ms 1 male sterile recurrent selection population was improved by adding new genes. And the segregation of other characters widened, making the populations suitable for the objective of soybean breeding. In this paper, we also discussed the breeding method, key technology, and selection effect of soybean ms 1 population.

关键词： soybean recurrent selection population ms 1 gene quality improvement segregating characteristics

在线全文

学校读者我要写书评

暂无评论

直升机战创伤救治能力建设的探讨

创伤外科杂志 2024年第4期26卷 256-260页

作者：戴伟燕强郭爱民徐莉萍李颖杨智伟解放军东部战区空军医院骨科南京210002 空军后勤部卫生局北京100010

以直升机为平台的战、创伤空中救护网络具有迅速及时、机动灵活、不受地形影响等优点,在欧美等发达国家已经成为急救救护的重要力量。本研究探讨在新时代军事变革的大潮下,依托我军搜救力量构建服务于我国平、战时的直升机战、创伤空运... 详细信息

以直升机为平台的战、创伤空中救护网络具有迅速及时、机动灵活、不受地形影响等优点,在欧美等发达国家已经成为急救救护的重要力量。本研究探讨在新时代军事变革的大潮下,依托我军搜救力量构建服务于我国平、战时的直升机战、创伤空运救护能力。通航和民航领域在全国急救体系中,具有无战时应急动员、审批程序简单、分布点位广泛、制约因素少的重要优势,军民融合模式下的国家空中医学救援对于整合空中医学救援更具价值,旨在提高人民医疗保障水平和战场保障能力,加强卫勤保障,为新形势下战伤救治储备实用的空运救护力量。

关键词：战伤救治空运救护直升机平台军民融合

Helicobacter pylori isolates from ethnic minority patients in Guangxi:Resistance rates,mechanisms,and genotype

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第16期20卷 4761-4770页

作者： Li-Juan Zhao yan-qiang Huang Bing-Pu Chen Xiao-qiang Mo Zan-Song Huang Xiao-Feng Huang Lian-Deng Wei Hong-Yu Wei Yuan-Hong Chen Hua-Ying Tang Gan-Rong Huang yan-Chun Qin Xiao-Hua Li Lu-Yao Wang Department of Medical Microbiology and Immunology You Jiang Medical College for Nationalities

AIM: To investigate the rate of Helicobacter pylori (H. pylori) resistance to clarithromycin among ethnic minority patients in Guangxi, explore the underlying mechanisms, and analyze factors influencing genotype distr... 详细信息

关键词： Helicobacter pylori Antibiotic resistance Mechanism Clarithromycin Genotype

Lonicera Japonica Caulis Ameliorates LPS and TNF-α-Induced HT-29 Cell Injury by Inhibiting the MAPK/ERK/JNK/p38 Pathway

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

Biomedical and Environmental Sciences 2024年第7期37卷 805-810页

作者： Hanxiu Lu Wei yan Xiao Yuan Yongbo Kang Zhongjian Liu qiang Guo Faculty of Life science and Technology Kunming University of Science and TechnologyKunming 650031YunnanChina School of medicine Kunming University of Science and TechnologyKunming 650031YunnanChina Department of Gastroenterology The First People’s Hospital of Yunnan ProvinceKunming 650032YunnanChina Department of Gastroenterology The First People’s Hospital of Yuxi CityYuxi 653100YunnanChina Institute of Basic and Clinical Medicine The First People’s Hospital of Yunnan ProvinceKunming 650032YunnanChina

Inflammatory bowel disease(IBD)is characterized by chronic inflammation of the intestinal tract,and shows a high rate of *** have accumulated extensive experience in the treatment of IBD,with biologics and small molecule drugs having greatly expanded the therapeutic scope of IBD in recent ***,such treatments involve a high price and a single target of drug action.

关键词： drugs treatment p38

Arbitrarily rotating polarization direction and manipulating phases in linear and nonlinear ways using programmable metasurface

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第9期13卷 1789-1800页

作者： Wei Liu Si Ran Wang Jun yan Dai Lei Zhang Qiao Chen qiang Cheng Tie Jun Cui State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China Institute of Electromagnetic Space Southeast UniversityNanjing 210096China Frontiers Science Center for Mobile Information Communication and Security Southeast UniversityNanjing 210096China Electrical Engineering Department Chalmers University of TechnologyGothenburg 41258Sweden

Independent controls of various properties of electromagnetic(EM)waves are crucially required in a wide range of *** metasurface is a promising candidate to provide an advanced platform for manipulating EM ***,we propose an approach that can arbitrarily control the polarization direction and phases of reflected waves in linear and nonlinear ways using a stacked programmable ***,we extend the space-timecoding theory to incorporate the dimension of polarization,which provides an extra degree of freedom for manipulating EM *** proof-of-principle application examples,we consider polarization rotation,phase manipulation,and beam steering at linear and nonlinear *** validation,we design,fabricate,and measure a metasurface *** experimental results show good agreement with theoretical predictions and *** proposed approach has a wide range of applications in various areas,such as imaging,data storage,and wireless communication.

关键词： surface. nonlinear rotating

Enhanced preparation of dendritic metallic vanadium in recyclable NaCl-KCl-VCl_(2) molten salt by V_(2)CO electrolysis

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

Rare Metals 2024年第8期43卷 3961-3973页

作者： Jia-Liang An Ming-Yong Wang Yong-Zheng Jia Jin-Tao Zhang Bao-yan Feng Shu-qiang Jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China College of Material Science and Engineering Hebei Province Laboratory of Inorganic Nonmetallic MaterialsNorth China University of Science and TechnologyTangshan 063210China

A promising method for the preparation of pure metallic vanadium via V_(2)CO anode electrolysis was proposed and *** simple and controllable synthesis of a molten chloride salt containing VCl_(2) by an insitu reaction between VCl_(3) and metallic vanadium was verified through thermodynamic analysis and ***-KCl-VCl_(2) molten salt exhibited excellent recycling performance and could be repetitively used to prepare metallic vanadium by V_(2)CO *** V^(2+) ions remained in the molten salt after *** electrolysis conditions,such as the cathode diameter,current density,V^(2+) ion concentration,and temperature,were optimised to maximise the current *** was also simulated to reveal the regulatory *** highest current efficiency was 85%.The purity of metallic vanadium was up to 99.8%.In this study,an easy and efficient preparation of pure metallic vanadium was achieved.

关键词： V_(2)CO Metallic vanadium Current efficiency Molten salt electrolysis

在线全文

学校读者我要写书评

暂无评论

可逆式冷轧机振动机理研究

振动与冲击 2010年第9期29卷 231-234页

作者：闫晓强张 北京科技大学机械工程学院北京100083

某钢铁公司引进德国SMS双机架可逆式冷轧机组,在轧制带钢过程中F2轧机发生了异常严重振动现象,导致带钢和支承辊表面上生成明暗振纹。通过现场综合测试、信号分析、理论研究与计算机仿真,确定了引起异常振动的原因。

关键词：冷轧机异常振动支承辊计算机仿真

生物降解聚合物支架在组织工程学中的制备和应用

在线全文

学校读者我要写书评

暂无评论

中国药学杂志 2005年第13期40卷 961-964页

作者：朱艳鲁莹钟延强上海第二军医大学药剂教研室上海200433

目的介绍不同聚合物支架在组织工程中的研究进展。方法着重比较了采用PLGA(polylactide-co-glycolide)等聚合物材料制备组织工程支架几种方法的特点以及支架体内外效应的研究。结果与结论随着新的聚合物骨架材料和骨架制备方法研究的日... 详细信息

目的介绍不同聚合物支架在组织工程中的研究进展。方法着重比较了采用PLGA(polylactide-co-glycolide)等聚合物材料制备组织工程支架几种方法的特点以及支架体内外效应的研究。结果与结论随着新的聚合物骨架材料和骨架制备方法研究的日渐成熟,组织工程学将在促进人类健康和疾病治疗中发挥愈来愈重要的作用。

关键词：组织工程 PLCA 聚合物骨架生物降解