检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

预混喷嘴式分流器性能实验研究

制冷学报 2019年第4期40卷 101-106页

作者：李文清天津商业大学冷冻冷藏技术教育部工程研究中心天津市制冷技术工程中心天津市制冷技术重点实验室

在制冷系统中,性能系数受到多个因素的影响,冷风机的性能是重要因素之一。分流器对节流后的制冷剂等干度、等流量分配的性能直接影响冷风机的综合传热特性。本实验优化设计了一种预混喷嘴式分流器(A)并建立实验台测试分流器性能。实验采... 详细信息

在制冷系统中,性能系数受到多个因素的影响,冷风机的性能是重要因素之一。分流器对节流后的制冷剂等干度、等流量分配的性能直接影响冷风机的综合传热特性。本实验优化设计了一种预混喷嘴式分流器(A)并建立实验台测试分流器性能。实验采用R22制冷剂,设计工况为库温-18℃,分别在0、-4、-8、-12、-16、-18、-20℃,7种库温工况下进行实验测试。测试结果与带喷嘴式分流器(B)、气液分离式分流器(C)、CAL分流器(D)、文丘里式分流器(E)进行对比,得到分流器综合性能从大到小为:A>B>C>D>E,分流器A的过热度、不均匀度、传热系数、制冷量均优于其他4种分流器,采用分流器A能够减小冷风机传热温差,降低不可逆损失,提高系统性能表现。

关键词：预混喷嘴式分流器不均匀度预混合冷风机

Design and implementation of web fast sharing platform of massive geological map

在线全文

学校读者我要写书评

暂无评论

Global Geology 2012年第2期15卷 114-119页

作者： YAN Yan XUE linfu ZHANG Wei li wenqing College of Earth Sciences Jilin University Changchun 130026 China

It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full play to the potential application value of geological map. Along with the network,the development of communication and computer technology,especially with the Web2.0 technology arisen,provides opportunities to the web for sharing of geological maps. Web fast sharing platform of massive geological maps( WSPGM) is based on the Flex technology development,using B/S architecture,with map navigation,search,display,security and other functions of the software system. Through the map pretreatment and asynchronous communication the system can display any size of geological map,and through the range limits,rights management,sharing system and watermark logo to take effective security on geological map. On the basis of this system,with the Jilin University web sharing system of geological map,the system can greatly improve the efficiency of using geological map. for research.

关键词： geological map sharing platform WSPGM

Fine mapping and validation of a stable QTL for thousand-kernel weight in wheat(Triticum aestivum L.)

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2023年第5期11卷 1491-1500页

作者： Deyuan Meng Aamana Batool Yazhou Xuan Ruiqing Pan Na Zhang Wei Zhang liya Zhi Xiaoli Ren wenqing li Jijie li Yanxiao Niu Shuzhi Zheng Jun Ji Xiaoli Shi Lei Wang Hongqing ling Chunhua Zhao Fa Cui Xigang liu Junming li liqiang Song Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesShijiazhuang 050022HebeiChina Ministry of Education Key Laboratory of Molecular and Cellular Biology Hebei Research Center of the Basic Discipline of Cell BiologyHebei Key Laboratory of Molecular and Cellular BiologyCollege of Life SciencesHebei Normal UniversityShijiazhuang 050024HebeiChina State Key Laboratory of North China Crop Improvement and Regulation College of AgronomyHebei Agricultural UniversityBaoding 071000HebeiChina State Key Laboratory of Plant Cell and Chromosome Engineering Chinese Academy of SciencesBeijing 100101China Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong School of AgricultureLudong UniversityYantai 264025ShandongChina Hebei Collaboration Innovation Center for Cell Signaling Shijiazhuang 050024HebeiChina College of life Science University of Chinese Academy of SciencesBeijing 100049China

Thousand-kernel weight(TKW)is a measure of grain weight,a target of wheat *** object of this study was to fine-map a stable quantitative trait loci(QTL)for TKW and identify its candidate gene in a recombinant inbred line(RIL)population derived from the cross of Kenong 9204(KN9204)and Jing411(J411).On a high-density genetic linkage map,24,26 and 25 QTL were associated with TKW,kernel length(KL),and kernel width(KW),respectively.A major and stable QTL,QTkw-2D,was mapped to an8.3 cM interval on chromosome arm *** saturation of polymorphic markers in its target region,QTkw-2D was confined to a 9.13 Mb physical interval using a secondary mapping population derived from a residually heterozygous line(F6:7).This interval was further narrowed to 2.52 Mb using QTkw-2D near-isogenic lines(NILs).NILs~(KN9204)had higher fresh and dry weights than NILsJ411at various grain-filling *** TKW and KW of NILs~(KN9204)were much higher than those of NILsJ411in field *** comparison of both DNA sequence and expression between KN9204 and J411,TraesCS2D02G460300.1(TraesKN2D01HG49350)was assigned as a candidate gene for *** was confirmed by RNA sequencing(RNA-seq)of QTkw-2D *** results provide the basis of map-based cloning of QTkw-2D,and DNA markers linked to the candidate gene may be used in marker-assisted selection.

关键词： Wheat Thousand-kernel weight Fine mapping Candidate gene

内蒙古莫尔道嘎地区晚三叠世-早侏罗世花岗岩的年代学、地球化学及其地质意义

在线全文

学校读者我要写书评

暂无评论

岩石学报 2022年第10期38卷 3021-3036页

作者：李宇李文庆孙金龙吉林大学地球科学学院长春130061 中国科学院地质与地球物理研究所北京100029 自然资源部东北亚矿产资源评价重点实验室长春130061 河北省地质矿产勘查开发局第八地质大队秦皇岛066000

本文对内蒙古莫尔道嘎地区(额尔古纳地块)花岗质岩石行了锆石LA-ICP-MS U-Pb年代学和岩石地球化学研究,确定其形成时代、岩石成因,从而揭示区域构造背景。莫尔道嘎地区花岗岩中的锆石均呈半自形-自形,震荡生长环带明显,暗示其岩浆成因... 详细信息

本文对内蒙古莫尔道嘎地区(额尔古纳地块)花岗质岩石行了锆石LA-ICP-MS U-Pb年代学和岩石地球化学研究,确定其形成时代、岩石成因,从而揭示区域构造背景。莫尔道嘎地区花岗岩中的锆石均呈半自形-自形,震荡生长环带明显,暗示其岩浆成因。测年结果显示,研究区花岗岩可划分为两个期次:晚三叠世(~216Ma)和早侏罗世(201~195Ma)。莫尔道嘎地区晚三叠世-早侏罗世花岗岩的地球化学属性相似,它们具有高硅(SiO_(2)=67.09%~77.05%)、富铝(Al_(2)O_(3)=12.18%~16.83%)、贫铁(Fe_(2)O_(3)^(T)=1.30%~3.48%)等特征,属于准铝质-过铝质(A/CNK=0.97~1.13)、高钾钙碱性系列,具有I型花岗岩的地球化学属性。此外,晚三叠世-早侏罗世花岗岩相对富集大离子亲石元素(liLEs)和轻稀土元素(LREEs),亏损重稀土元素(HREEs)和高场强元素(HFSEs,Nb、Ta、P、Ti等),具有与俯冲带环境下形成的火成岩类似的特征。额尔古纳地块上同时期的钙碱性系列岩石组合的发现,进一步表明莫尔道嘎地区晚三叠世-早侏罗世花岗岩形成于活动大陆边缘环境。结合前人对东北地区中生代火成岩时空变异分布特征的研究,本文莫尔道嘎地区晚三叠世-早侏罗世花岗质岩体形成与蒙古-鄂霍茨克大洋板片南向俯冲作用密切相关。

关键词：莫尔道嘎地区晚三叠世-早侏罗世年代学地球化学蒙古-鄂霍茨克大洋板片南向俯冲

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

上海地铁地下连续墙混凝土碳化深度预测模型

同济大学学报（自然科学版） 2007年第1期35卷 1-5页

作者：汤永净李文卿同济大学地下建筑与工程系上海200092

为了得到针对地下连续墙的碳化深度预测模型,对现场取制试件进行了快速碳化试验.试件取自建成已10年之久的上海地铁一号线,试验分别在CO2为20%,30%两种质量分数下进行.利用Matlab对试验数据进行回归得到了三种地下连续墙碳化深度预测模... 详细信息

为了得到针对地下连续墙的碳化深度预测模型,对现场取制试件进行了快速碳化试验.试件取自建成已10年之久的上海地铁一号线,试验分别在CO2为20%,30%两种质量分数下进行.利用Matlab对试验数据进行回归得到了三种地下连续墙碳化深度预测模型:随时间以及CO2质量分数变化的预测模型;随混凝土抗压强度变化的预测模型;考虑碳化龄期和混凝土抗压强度变化的预测模型.分析表明,所得碳化深度预测模型有其可靠性和实用性.

关键词：地下连续墙快速碳化试验碳化深度混凝土抗压强度

Diagnosis and Treatment of a Case of Leydig Cell Tumor in Dogs

在线全文

学校读者我要写书评

暂无评论

Animal Husbandry and Feed Science 2014年第4期6卷 195-196,200页

作者： Xiang Jinmei Yin Hongbin li wenqing Wan Chunyun Hubei Vocational College of Bio-technology College of Veterinary Medicine Huazhong Agricultural University Yunnan Animal Health Inspection Institute College of Animal Science Yangtze University

Based on such diagnostic measures as clinical diagnosis and lab etiological examination,the disease was diagnosed as Leydig cell tumor in dogs. Combined with the clinical examination results of the dog,testicular tumo... 详细信息

关键词： Leydig cell tumor in dogs Diagnosis Removal operation

Integration and application of panorama field geological images and Google maps

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

Global Geology 2012年第1期15卷 35-41页

作者： XU Chunhui ZHENG Xishen li wenqing ZHANG Wei XUE linfu College of Tourism and Geographical Sciences Jilin Normal University Siping 136000 Jilin China College of Earth Sciences Jilin University Changchun 130061 China Hydrogeological Survey of Jilin Province Changchun 130012 China

Panorama field geological image is an important form of displaying field geology information with high *** an example for Xingcheng,the authors studied the use of panorama field geological images based on the Flex for rich client display technology,application of Google maps API for Flash,and discussed construction method for field geological panoramic information system which created the rich client Internet application *** results indicate that using Google maps API to mark position and route of panoramic image collection point can be fully integrated field geological information and map *** can provide visual field geological information for *** program is characterized by quick execution speed,strong interaction and rich function,which promotes the users'experience effectively.

关键词： panoramic image Flex Google maps rich client

Recent progress in periodic patterning fabricated by self-assembly of colloidal spheres for optical applications

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2020年第8期63卷 1418-1437页

作者： Jing liu Xingang Zhang wenqing li Changzhong Jiang Ziyu Wang Xiangheng Xiao School of Physics and Technology Key Laboratory of Artificial Micro-and Nano-structures of Ministry of EducationHubei Nuclear Solid Physics Key LaboratoryWuhan UniversityWuhan 430072China Institute of Technological Sciences Wuhan UniversityWuhan 430072China Synergetic Innovation Center for Quantum Effects and Application Key Laboratory of Low Dimensional Quantum Structures and Quantum ControlSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China Su Zhou Institute of Wuhan University Suzhou 215123China

Colloidal crystals are periodically ordered arrays of monodisperse colloidal particles which represent a new class of self-assembled materials showing potential applications in many ***-dimensional graphic nanostructures based on colloidal crystals have inherent periodicity from tens of nanometers to several micrometers,which gives them rich and interesting optical *** article presents a comprehensive review about the current research activities on the self-assembly of colloidal spheres which is an effective strategy for fabrication of various hierarchical and ordered nanostructures,with particular attention paid to the unique properties and applications of the colloidal crystal-based *** main aspects are elaborated:a)controllable self-assembly of colloidal crystals;b)the functions of the obtained colloidal spheres acting as the patterned mask for successive construction of numerous nanostructures;c)the novel properties and promising optical applications of the patterned nanostructures in various domains,such as plasmonic-related fields,antireflection,photonic crystals,photocatalysis and electronic *** that,the current challenges and future perspectives in this area are *** review aims to inspire more ingenious designs and exciting research for manufacturing nanostructures utilizing colloidal self-assembly.

关键词： colloidal crystals self-assembly patterned nanostructures plasmonic antireflection photonic crystals

在线全文

学校读者我要写书评

暂无评论

Word文档激光照排输出探讨

中国科技期刊研究 2009年第4期20卷 655-657页

作者：李文清河南理工大学学术出版中心

Word软件是一款功能强大的排版和绘图软件,但由于其输出功能较弱,不能直接输出激光照排常用的PS文件,限制了Word软件用于书刊的排版。随着功能强大、灵活易用的Adobe Acrobat 7.0 PRO软件的推出和PS打印机的日益推广,有效地解决了Word... 详细信息

Word软件是一款功能强大的排版和绘图软件,但由于其输出功能较弱,不能直接输出激光照排常用的PS文件,限制了Word软件用于书刊的排版。随着功能强大、灵活易用的Adobe Acrobat 7.0 PRO软件的推出和PS打印机的日益推广,有效地解决了Word文档激光照排输出的难题。Word文档经过Adobe Acrobat 7.0 PRO软件的多次转化或经过PS打印机的打印功能均可生成用于激光照排的PS文件。笔者的实践证明,这些方法稳定可靠、简单易学,不但弥补了Word软件的输出弱项,而且为Word文档直接用于印刷提供了质量保证。

关键词： Word文档 Adobe Acrobat 7.0 PRO软件激光照排 PS打印机 PDF文件 PS文件