检索结果-南通市图书馆

An Efficient, Three-component One-pot Preparation of 1,4-Dihydropyridines Containing Novel Substituted Pyrazole under Sulfamic Acid Catalysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第3期29卷 511-514页

作者： Li, jianping qiu, Jikuan Li, Huijuan Zhang, Guisheng College of Chemistry and Environmental Science Key Labaratory of Green Chemical Media and Reactions Ministry of Education Henan Normal University Xinxiang Henan 453007 China

An efficient approach to 1,4-dihydropyridines containing novel substituted pyrazole is achieved via threecomponent reaction of pyrazolyl aldehyde, β-ketoester, and ammonium acetate in one-pot under sulfamic acid cata... 详细信息

关键词： Hantzsch reaction 1,4-dihydropyridines pyrazole sulfamic acid catalysis synthesis

Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods

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

Journal of Environmental Sciences 2013年第12期25卷 2460-2468页

作者： Zhiqiao He Qiaolan Cai Huiying Fang Gaohua Situ jianping qiu Shuang Song Jianmeng Chen College of Biological and Environmental Engineering Zhejiang University of Technology

A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium nbutoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder diffraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a futile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80：20, which is beneficial to the effective separation of the photogenerated electron-hole pairs.

关键词： photocatalysis TiO2 anatase nanoparticles rutile nanoflowers simulated solar light illumination.

LncRNA CACNA1G-AS1 up-regulates FTH1 to inhibit ferroptosis and promote malignant phenotypes in ovarian cancer cells

在线全文

学校读者我要写书评

暂无评论

Oncology Research 2023年第2期31卷 169-179页

作者： YANPING JIN jianping qiu XIUFANG LU YAN MA GUOWEI LI Department of Obstetrics and Gynecology The Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhou Municipal Hospital NorthSuzhouChina Department of Neurosurgery The Second Affiliated Hospital of Soochow UniversitySuzhouChina

Previous study revealed that ferritin heavy chain-1(FTH1)could regulate ferritinophagy and affect intracellular Fe^(+)content in various tumors,while its N6-methyladenosine(m6A)RNA methylation was closely related the prognosis of ovarian cancer ***,little is known about the role of FTH1 m6A methylation in ovarian cancer(OC)and its possible action *** this study we constructed FTH1 m6A methylation regulatory pathway(LncRNA CACNA1G-AS1/IGF2BP1)according to related bioinformatics analysis and research,through clinical sample detections we found that these pathway regulatory factors were significantly up-regulated in ovarian cancer tissues,and their expression levels were closely related to the malignant phenotype of ovarian *** vitro cell experiments showed that LncRNA CACNA1G-AS1 could up-regulate FTH1 expression through IGF2BP1 axis,thus inhibited ferroptosis by regulating ferritinophagy,and finally promoted proliferation and migration in ovarian cancer ***-bearing mice studies showed that the knock-down of LncRNA CACNA1G-AS1 could inhibited the tumorigenesis of ovarian cancer cells in vivo *** results demonstrated that LncRNA CACNA1G-AS1 could promote the malignant phenotypes of ovarian cancer cells through FTH1-IGF2BP1 regulated ferroptosis.

关键词： Ovarian cancer m6A methylation Ferroptosis Mitophagy Malignant phenotype

Analysis of the ore-controlling structure of the Shihu gold deposit, Hebei Province and deep-seated ore-prospecting prediction

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

Chinese Journal Of Geochemistry 2009年第4期28卷 386-396页

作者： NIU Shuyin WANG Baode SUN Aiqun CHEN Chao WANG Zili MA Baojun WANG Wenxue JIANG Xiaoping ZHAO Yongli GAO Yincang LIU Huabin qiu jianping College of Resources Shijiazhuang University of Economics Shijiazhuang 050031 China Shijiazhuang Integrated Geological Party Shijiazhuang 050081 China Shihu Gold Mine Shijiazhuang 050506 China

Under the guidance of the theory of mantle-branch structure-associated metallogenesis and on the basis of the geological characteristics, analysis of the ore-forming and ore-controlling structures, the geochemical characteristics of metallogenesis, the source of ore-forming materials, changes in the physical and chemical conditions of metallogenesis, changes in the vertical width of ore veins, and changes in gold grade of the Shihu gold deposit, the mechanism of its metallogenesis was discussed and the rules of vertical variation of ore veins were summarized in this study. It is pointed out that the orebodies under exploitation at present time should be in the middle and upper portions of gold veins in the Shihu gold mining district. Particularly on the basis of the characteristics of mantle-branch structure-associated metallogenesis, it is indicated that metallogenesis is controlled mainly by such ore-forming conditions as temperature and pressure. Deep-seated ore-forming fluids are characterized mainly by injection and precipitation. So the vein bodies in the adjacent metallogenic structures are of obvious comparability, and there would be great prospects for ore search both at depth and in the periphery of the Shihu gold deposit. Therefore, ore prospecting should be strengthened both at depth and in the peripheries.

关键词：分支结构找矿预测金矿脉控矿河北省成矿理论地球化学特征成矿物质来源

在线全文

学校读者我要写书评

暂无评论

分级存储系统中一种数据自动迁移方法

计算机研究与发展 2012年第8期49卷 1804-1810页

作者：张广艳丘建平清华大学计算机科学与技术系北京100084 符号计算与知识工程教育部重点实验室(吉林大学) 长春130012

分级存储系统通过将数据在不同性能设备间动态迁移以达到高性能.已有分级存储系统未能充分利用负载信息导致数据迁移严重影响应用性能.提出了一种分级存储系统中的数据自动迁移方法AutoMig,目标是提高前台应用的I?O性能.AutoMig综合文... 详细信息

分级存储系统通过将数据在不同性能设备间动态迁移以达到高性能.已有分级存储系统未能充分利用负载信息导致数据迁移严重影响应用性能.提出了一种分级存储系统中的数据自动迁移方法AutoMig,目标是提高前台应用的I?O性能.AutoMig综合文件访问历史、文件大小、设备利用情况等参数,对文件进行动态分级,并使用LRU队列维护快速存储设备中的文件状态;挖掘关联文件用于自动预取;针对不同文件迁移操作采取不同的速率控制策略.对降级操作,根据负载变化动态调整迁移速率,对回迁操作则采取尽力而为的策略.在分级存储系统中的应用表明,与已有方法相比,AutoMig有效缩短了前台I?O响应时间.

关键词：分级存储数据迁移数据分级关联挖掘速率控制

在线全文

学校读者我要写书评

暂无评论

共演博弈下的网络合作

智能系统学报 2014年第1期9卷 88-91页

作者：仇建平太原科技大学计算机科学与技术学院山西太原030024

针对社会网络上个体之间的竞争与合作,设计了社会网络模型。通过引入博弈理论,仿真社会网络个体间复杂的交互关系,即合作者或背叛者依据收益矩阵和邻居节点进行博弈。仿真结果显示当影响度过低或过高时,合作不易形成,影响度适中时合作... 详细信息

针对社会网络上个体之间的竞争与合作,设计了社会网络模型。通过引入博弈理论,仿真社会网络个体间复杂的交互关系,即合作者或背叛者依据收益矩阵和邻居节点进行博弈。仿真结果显示当影响度过低或过高时,合作不易形成,影响度适中时合作水平最高;当收益固定时,合作变为扩散,形成更高的威望。最后,通过MovieLens数据集验证了群聚效应的存在,分析了舆论领袖对于网络群体的巨大影响力。

关键词：社会网络共演博弈合作群聚效应舆论领袖

在线全文

学校读者我要写书评

暂无评论

互联网关注力的模型分析

智能系统学报 2013年第4期8卷 339-343页

作者：仇建平太原科技大学计算机科学与技术学院山西太原030024

随着基于互联网的社会媒体及其应用的迅速发展,互联网用户的"关注"对建立在其基础上的"虚拟经济"具有越来越重要的意义,通过把人看作是传播的内容,把信息资源看作是对象,互联网可以被看作是一个人类关注力在信息资源之间分配和流动的网... 详细信息

随着基于互联网的社会媒体及其应用的迅速发展,互联网用户的"关注"对建立在其基础上的"虚拟经济"具有越来越重要的意义,通过把人看作是传播的内容,把信息资源看作是对象,互联网可以被看作是一个人类关注力在信息资源之间分配和流动的网络.利用搜集和分析互联网用户行为的数据,构建了基于互联网的关注力转移网络,给出了一个描述互联网用户关注力的动力学模型.实验结果表明,相比Web 1.0站点而言,Web 2.0站点更受关注,网站的关注力增长小于流量增长,存在着"规模不经济"的现象,相比搜索引擎和广告联盟,广告网络和垂直网络更受关注.

关键词：互联网虚拟经济关注力模型长尾分布

Influence of particle composition on thorium scavenging in the marginal China seas

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2009年第2期28卷 45-53页

作者： YANG Weifeng CHEN Min CAO jianping qiu Yusheng ZHANG Run MA Qiang TONG Jinlu YANG Junhong YANG Zhi LUE E Department of Oceanography Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Thorium-234 and particle composition （organic matter, biogenic silica, carbonate and lithogenic component） were examined in the East China Sea （ECS） and the northern South China Sea （NSCS） in order to constrain the particle types scavenging thorium isotopes. Good positive correlations between particulate organic matter （POM） or carbonate and thorium-234 in suspended particulate matter （SPM） indicates that POM and carbonate are efficient to scavenge thorium-234. No relationship between biogenic silica and thorium-234 suggests that geochemical behavior of thorium-234 may be not influenced by biogenic silica. A simple model was used to evaluate the affinity of thorium-234 to different particle components. The results show that POM is the most efficient scavenger for thorium-234 in the ECS and the NSCS, followed by carbonate. The authors＇ results lend support to the utility of thorium-234 as a proxy of POC and carbonate in the upper layer. However, the strong dependence of thorium scavenging on particle composition challenges thorium-230 as a constant flux proxy.

关键词： POC biogenic silica thorium carbonate particle composition

An Initial Analysis on the Character Charm of Jane Eyre

在线全文

学校读者我要写书评

暂无评论

西昌农业高等专科学校学报 1999年第2期13卷 50-53页

作者： Wu jianping qiu Shifeng (Xichang Agricultural College,Xichang,Sichuan 615013)

Jane Eyre,described by ***,was a very glorious female *** won people's praise with ber strong revolting spirit and independent and self-respect personality,which would give a great many hints to the modern yound *** p... 详细信息

关键词：《简·爱》女性形象自尊独立性人格魅力人物分析