检索结果-南通市图书馆

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： Y.J.zhou Q.H.Yuan X.m.Wang G.Q.Yin C.z.Dong Key Laboratory of Atomic and molecular Physics & Functional materials of Gansu province College of Physics and Electronic EngineeringNorthwest Normal University

Atmospheric pressure plasma jets(APPJs) are of great interest because of their high potential for new plasma applications without the need of expensive vacuum *** APPJs have the capability of delivering a unique reactive chemistry to various surfaces at room *** preparations of various carbon nanomaterials have become research *** the present work,the characteristics of methanol plasma discharge driven

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

光纤光栅温度传感器在地源热泵中应用

大连理工大学学报 2006年第6期46卷 891-895页

作者：孙丽任亮李宏男大连理工大学土木水利学院大连理工大学土木水利学院辽宁大连116024

地源热泵应用地下土壤的地热资源,为建筑冬季供暖和夏季制冷.为了实时监测地源热泵工作过程中垂直盘管换热器周围土壤温度的变化,应用3个自行研制的光纤光栅温度传感器,组成分布式光纤光栅温度监测系统对其进行监测.3个光纤光栅温度传... 详细信息

地源热泵应用地下土壤的地热资源,为建筑冬季供暖和夏季制冷.为了实时监测地源热泵工作过程中垂直盘管换热器周围土壤温度的变化,应用3个自行研制的光纤光栅温度传感器,组成分布式光纤光栅温度监测系统对其进行监测.3个光纤光栅温度传感器分别安置在25 m垂直盘管的5、15和25 m处.垂直盘管安装完后,应用FBG波长解调系统采集数据.采用双层钢管封装的光纤光栅温度传感器,有效消除了应变对光纤光栅的影响,同时也提高了光纤光栅的温度灵敏度.该光纤光栅温度传感系统对地源热泵长期工作状态进行了监测,监测结果与理论计算结果符合很好.

关键词：光纤布拉格光栅地源热泵在线温度监测温度传感器

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于空间特性的台风风灾害评估

工程力学 2022年第12期39卷 212-221页

作者：任贺贺柯世堂杨杰南京航空航天大学土木与机场工程系南京210016

针对仅考虑强度相关单因素的风灾害评估方法不能准确表征台风风灾害程度问题,该文依据三种不同沿海基础设施抗风等级对应的风灾害指标因子公式,通过开展基于面积积分风灾害评估方法研究台风空间特性对灾害评估的重要性。网格分辨率影响... 详细信息

针对仅考虑强度相关单因素的风灾害评估方法不能准确表征台风风灾害程度问题,该文依据三种不同沿海基础设施抗风等级对应的风灾害指标因子公式,通过开展基于面积积分风灾害评估方法研究台风空间特性对灾害评估的重要性。网格分辨率影响风灾害评估指标因子,分辨率越高,该指标因子越高;海表温度也是风灾害评估指标因子的影响因素,海表温度越高,该指标因子越高;且分辨率约为200 m甚至500 m时可准确表征台风风灾害。研究表明:基于面积积分风灾害评估方法相较传统单因素评估方法能够更准确表征台风风灾害程度;但外围小风速对风灾害评估影响较大,SST-27、SST-28和SST-29风灾害程度最高约为65%,SST-26最高约为90%。因此,针对风速小但尺寸大和风速大但尺寸小台风风灾害评估问题,引用切入风速概念后,小风速对风灾害评估影响显著降低,SST-27、SST-28和SST-29风灾害程度最高约为13%,SST-26最高约为3%,解决了小风速区间占比过大但对结构损伤无作用问题。

关键词：台风风灾害空间特性风灾害指标面积积分切入风速

维普期刊数据库博看期刊

支持企业资源计划快速开发的计算无关层全局模型建模

在线全文

学校读者我要写书评

暂无评论

计算机集成制造系统 2009年第12期15卷 2343-2349页

作者：车颖王刚问晓先任秉银哈尔滨工业大学机电工程学院黑龙江哈尔滨150001

针对目前企业资源计划系统灵活性较差、定制开发实施周期漫长且成本较高的问题,应用模型驱动架构的相关技术和思想,研究了模型驱动的企业资源规划系统快速开发模式。为了优化并快速建立企业业务模型,面向该模式提出了全局模型的概念,由... 详细信息

针对目前企业资源计划系统灵活性较差、定制开发实施周期漫长且成本较高的问题,应用模型驱动架构的相关技术和思想,研究了模型驱动的企业资源规划系统快速开发模式。为了优化并快速建立企业业务模型,面向该模式提出了全局模型的概念,由此建立了包括全局模型和业务模型的计算无关层模型结构。在此基础上,重点研究了面向企业资源规划系统快速开发过程的全局模型建模方法。将全局模型分为全局业务分析模型及全局业务模型,并构造成为按层次分解的模型结构,建立了它们的基本模型,定义了基本模型中的元素。最后通过全局业务分析模型和全局业务模型的图形化建模实例验证了上述建模理论的可行性和实用性。

关键词：企业资源计划模型驱动模型驱动架构计算无关模型全局模型

维普期刊数据库

Simulation System for Quality Prediction and Parameters Optimization in machining Hydroxyapatite-SiCw Bioceramics

在线全文

学校读者我要写书评

暂无评论

Simulation System for Quality Prediction and Parameters Opti...

Co-mOF-74的合成及其吸附正己烷/1-己烯性能

The 9th International Symposium on Advances in Abrasive Technology

作者： z.W. Niu, L. Li and X.m. Huang School of mechanical Engineering, Shandong University of technology, zibo 255049, China

A simulation system was developed to forecast machining quality and optimize grinding parameters for the machining of hydroxyapatite-SiCw bioceramics. The system can forecast the surface quality of machined hydroxyapatite-SiCw bioceramics with high precision, optimize machining parameters and analyze the dominant factors. Based on the process database , the simulation system is applicable to various machining methods. It can help to raise the automaticity for the machining of hydroxyapatite-SiCw bioceramics and develop the farther intelligent system.

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

化工进展 2019年第S01期38卷 179-185页

作者：刘露任丹妮刘继三华陆工程科技有限责任公司陕西西安710065 华东理工大学石油加工研究所上海200237

采用溶剂热方法合成了Co-mOF-74,采用X射线衍射(XRD)、氮气吸附、红外光谱(FTIR)、热重-差热分析(TG-DSC)和扫描电子显微镜(SEm)对其进行表征,研究其吸附正己烷/1-己烯性能。结果表明,优化的Co-mOF-74合成工艺条件为:原料配比n[Co(NO3)2... 详细信息

采用溶剂热方法合成了Co-mOF-74,采用X射线衍射(XRD)、氮气吸附、红外光谱(FTIR)、热重-差热分析(TG-DSC)和扫描电子显微镜(SEm)对其进行表征,研究其吸附正己烷/1-己烯性能。结果表明,优化的Co-mOF-74合成工艺条件为:原料配比n[Co(NO3)2·6H2O]︰n(DHTP)︰n(THF)︰n(H2O)=2︰1︰165︰750,晶化温度100℃,晶化时间24h,150℃活化2h。合成Co-mOF-74对1-己烯和正己烷的静态饱和吸附量分别为125.6mg/g和72.9mg/g,BET比表面积为1209m^2/g,孔体积为0.41cm^3/g,微孔平均孔径为0.66nm。L-F吸附模型能较好地解释Co-mOF-74材料对1-己烯的吸附等温线数据,Co-mOF-74吸附1-己烯的过程是热力学自发放热过程。

关键词：合成吸附烷烃分离

维普期刊数据库

Seepage Investigation on an Existing Dam Using Very Low Frequency Electromagnetic (VLF-Em) methods: A Case Study of Shagari Earth Dam, Sokoto, North Western Nigeria

在线全文

学校读者我要写书评

暂无评论

International Journal of Geosciences 2020年第2期11卷 25-36页

作者： U. z. magawata D. S. Bonde B. U. Abdullahi Basiru Qudus m. N. Yahaya Physics Department Kebbi State University of Science and Technology Aliero Nigeria Department of Science Laboratory Technology The Oke-Ogun Polytechnic Saki Oyo State Nigeria Department of Physics with Electronics Federal University Birnin-Kebbi Birnin Kebbi Nigeria

Very low frequency (VLF-Em) was used to assess variations in overburden composition, bedrock lithology and the hidden Sedimentary structures within the foundation of Shagari Dam of the sedimentary basin of Northwestern Nigeria. Four VLF-electromagnetic (Em) traverses were occupied at 10 m in-tervals. The VLF normal and filtered real component irregularities identify major geological interfaces suspected to be faults/fractured zones. The points of crossover between the real and imaginary components delineate the fractured zones, which were identified as areas of possible seepage (sloughing and piping). The fractured zones are suspected to be present at all traverses. In total, 38 fractured zones were identified along the dam embankment and canal site, while 17 major fractures occurrence dippers along the Traverses at a point, Traverse 1 (F3, F4, F5, F7, F10, F11), Traverse 2 (F12, F13, F21, F22), Traverse 3 (F23, F24, F29) and Traverse 4 (F32, F33, F34, F38), and coincide with cross over point at 4 traverses. These seepage zones cause heterogeneity in the sub-surface structure that could be prime to dam failure which in turn leads to the flooding, decreases in irrigations activities of the peoples leaving around the dam and loss of several hundreds of life when care not taken. The result of the study suggests that VLF is suitable for observing seepages in embankment dams.

关键词： Overburden Interfaces Occurrence Heterogeneity Embankment

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

多层编织预成形件的制造

国外导弹与航天运载器 1992年第1期 57-68页

作者： m.H.mohamed z.zhang 汪天汉

本文评述了当前通用的三向编织工艺程序,并讨论了为编织三向多层织物由北卡罗纳州大学的火星任务研究中心发展的工艺方法。从简单的层压板到T形截面和Ⅰ形截面的型梁以及大的刚性层压板,织体的体积和复杂性都可以变化。还讨论了诸如纤... 详细信息

本文评述了当前通用的三向编织工艺程序,并讨论了为编织三向多层织物由北卡罗纳州大学的火星任务研究中心发展的工艺方法。从简单的层压板到T形截面和Ⅰ形截面的型梁以及大的刚性层压板,织体的体积和复杂性都可以变化。还讨论了诸如纤维走向、每一方向上所需纤维的容积百分数、纱距或密度等决定复合材料物理性能的参数。

关键词：纤维增强的复合材料成形工艺制造

维普期刊数据库

Lithium inhibits proliferation of human esophageal cancer cell line Eca-109 by inducing a G_2/m cell cycle arrest

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第25期14卷 3982-3989页

作者： Jin-Sheng Wang Cui-Lian Wang Ji-Fang Wen Yong-Jin Wang Yong-Bin Hu Hong-zheng ren Department of Pathology Xiangya Medical CollegeCentral South University Changsha 410008 Hunan ProvinceChina Department of Pathology Changzhi Medical College Changzhi046000 Shanxi Province China

AIm： To investigate the effect of lithium on proliferation of esophageal cancer （EC） cells and its preliminary mechanisms. mETHODS： Eca-109 cells were treated with lithium chloride, a highly selective inhibitor of glycogen synthase kinase 31）（GSK-31））, at different concentrations （2-30 mmol/L） and time points （0, 2, 4, 6 and 24 h）. Cell proliferative ability was evaluated by 3-（4,5-Dimethylthiazol-2-yl）-2, 5-diphenyltetrazolium bromide （mTT） assay, and Cell cycle distribution was examined by flow cytometry. Expressions of p-GSK-3β, β-catenin, cyclin B1, cdc2 and cyclin D1 protein were detected by Western blotting, and the subcellular localization of β-catenin was determined by immunofluorescence. The mRNA level of of cyclin B1 was detected by reverse transcription polymerase chain reaction （RT-PCR）. RESULTS： Lithium could inhibit the proliferation of Eca-109 cells. Lithium at a concentration of 20 mmol/L lithium for 24 h produced obvious changes in the distribution of cell cycle, and increased the number of cells in G2/m phase （P 〈 0.05 vs control group）. Western blotting showed that lithium inhibited GSK-β） by Ser-9 phosphorylation and stabilized free β-catenin in the cytoplasm. Immunofluorescence further confirmed that free β-catenin actively translocated to the nucleus. Horeover, lithium slightly elevated cyclin D1 protein expression, whereas lowered the cyclin B1 expression after 24 h lithium exposure and no obvious change was observed for cdc2 protein. CONCLUSION： Lithium can inhibit the proliferation of human esophageal cancer cell line Eca-109 by inducing a G2/H cell cycle arrest, which is mainly mediated through the inhibition of lithium-sensitive molecule, GSK-3β, and reduction of cyclin B1 expression.

关键词： Lithium Esophageal cancer Cell cycle Glycogen synthase kinase 3β