检索结果-南通市图书馆

Using repeated precise gps campaigns for research of present-day crustal movement and strain in the Qinghai-Tibetan Plateau

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 Science Bulletin 2001年第8期46卷 694-698页

作者： LIU Jingnan XU Caijun SONG Chenghua SHI Chuang JIANG Weiping DONG Lixiang GPS Engineering Research Center Wuhan UniversityWuhan 430079China School of Geo-science and Surveying Engineering Wuhan UniversityWuhan 430079China

The problem of crustal movement in the Qing-hai-Tibetan Plateau is a hotstopic of the present-day international geodetic world. GPS observations in 1993, 1995 and 1997 are used to survey the three-dimensional displacement of GPS monitoring station in the Qinghai-Tibetan Plateau, and to calculate and analyze the present-day crustal movement and strain in the Qinghai-Tibetan Plateau. The result of repeated campaign shows that the crustal movement in the Qinghai-Tibetan Plateau is still compressing in the north and south directions, extending in the west and east directions, and uplifting in the vertical direction. The relative convergence velocity of the Himalayan block is approximately (19.5±1.7)mm/a, the strain velocity is about (5.5±6.0) mm/a, and the uplifting velocity is some (7.6±5.2) mm/a. The compression velocity of the Tibet block relative to Golmud in the north and south directions is (9.3±4.6) mm/a, the strain velocity of the middle part in the west and east directions is (15.6±6.3) mm/a,

关键词： GPS surveying Qinghai-Tibetan Plateau crustal move- ment strain analysis.

GRANITOIDS,VOLCANIC ROCKS AND CHERTS FROM NORTH ALTYN TAGH,NW CHINA: IMPLICATION FOR THE TECTONIC ENVIRONment DISCRIMINATION

在线全文

学校读者我要写书评

暂无评论

地学前缘 2000年第S1期7卷 249-250页

作者： Chen Xuanhua\+1,Wang Xiaofeng\+1,Chen Zhengle\+1,George Gehrels\+2,Yin An\+3[WT5,5”BX](1.Institute of Geomechanics,CAGS,Beijing 100081,China 2.Department of Geosciences, University of Arizona,Tucson,AZ 85721,USA 3.Department of Earth and Space Science

Granitoids,volcanic rocks and cherts,mainly of early Paleozoic,in northern Altyn Tagh(Fig.1) are analyzed here for the purpose of the determination of the tectonic environments and their development since Early Paleozoic.(1) Granitoids\ The collection of 128 main\|element petrochemical data from North Altyn Tagh area shows that most of the granitoids here are granites and granodiorites of calc\|alkaline *** consist mainly of metaluminous and peraluminous in Shand’s index,and only one of them,which belongs to Mesozoic,is *** of the granitoids plot in the IAG+CAG+CCG fields in the Maniar and Piccoli’s diagrams (1989) for tectonic discrimination of *** (Island arc granitoids)and CAG (Continental arc granitoids) can be distinguished for Early and Late Paleozoic granitoids,and maybe some CCG (Continental collision granitoids) for Early *** of Mesozoic and Cenozoic inherited the characteristics of those of *** active plate margin (pre\|plate collision)and Anatectic magmatism(syn\|orogenic,S\|type granites)are distinguished (Fig.2)for Paleozoic granitoids using de la Roche R 1\| R 2 multicationic diagram (Batchelor and Bowden,1985).Mesozoic and Cenozoic granitoids inherited the characteristics of Anatectic magmatism (syn\|orogenic)of these early ones,and post\|orogenic(A\|type)granites occurred in *** mechanism for magma formation is mainly partial melting.

关键词： granitoids volcanic rocks cherts tectonic environ ment Altyn Tagh

MEASUREmentAL RESEARCH ON THE MAGNETOMECHANICAL COUPLING PROPERTIES OF RARERARTH GIANT MAGNETOSTRICTION MATERIALS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 357-360页

作者： C.Y. Li1) , H.Q. Yuan2) , F.X. Meng3) and Z. Zhou4) 1) Institute of Liaoning Technology,Jinzhou 121001 ,China 2) Northeastern University ,Shenyang 10006 ,China 3) Shenyang University ,Shenyang 110044 ,China 4) Xincheng Rare Earth Magnetostrictive Mate

The physical modelanditsequivalentcircuitoftestapparatusissetup by meansofimpedanceanalysis method. The magnetostriction coefficient, magnetomechanicalcoupling coefficient,frequency and anti- frequency of TbxDy1 - xFe2 - z(0 27 ≤x ≤0 3 ,0 ≤z ≤0 1) rod are measured. Somecoupling problems with mechanicalstress and electromagnetic field such as flux leakage in magnetic path are discussed. The comparing calculated with tested resultsshowsthe accuracyof measurementand thesimplification of model.

关键词： magnetostriction material magnetomechanicalcoupling properties experi ment

Design of Collaborative Platform on Clustering Applications for Governments

在线全文

学校读者我要写书评

暂无评论

Intelligent Information Management 2009年第1期1卷 30-35页

作者： Xuewang ZHANG Zhoujun LI Wei SHEN 不详

Collaborative platform on clustering applications for governments consists of six large-scale systems, including the clustering Government Internet portal system, clustering public-mailboxes collaboration system, clustering government affairs portal system, clustering emergency information collaboration system, clustering office automation collaboration system, and clustering messages collaboration systems. The appli-cation and technology architectures of the collaborative platform are elaborated in this paper,and the major key technologies on the platform are also expounded, which includes realization of many governments ap-plications’ scale integration and collaborative application, business model driven software development plat-form based on SOA, SSO, tans-departmental and cross-level multi-engine clustering protocol. Based on the "clustering application"design, to maximize the utilization of hardware, software resources and administra-tive resources of the provincial government collaborative platform, rural districts and counties can build their own platforms based on the provincial platform. The platform having been running for over 2 years shows that planning of urban and rural e-governments’ construction and maintenance is achieved, thus reducing costs greatly and improving governments’ functions.

关键词： clustering applications collaborative applications single sign on components e-govern- ment

Le rôle de l’économie numérique dans le développement de l’économie chinoise

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

今日中国（法文版） 2022年第9期60卷 35-37页

作者： HANANE THAMIK l'école de gestion de l’information de l'Universitéde Wuhan CGTN Africa et Africa China Review ainsi que pour le magazine canadien États de Splendeur

Après des années d’essor,l’économie numérique chinoise est devenue l’une des forces économiques *** ce contexte,la Chine a fait de l’économie numérique un élément essentiel de sa stratégie nationale de développement,en élaborant une feuille de route détaillée et en lançant des mesures incitatives pour renforcer le secteur.

关键词： des ill ment

Transverse phase space reconstruction study in Shanghai soft X-ray FEL facility

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

Nuclear Science and Techniques 2018年第1期29卷 9-15页

作者： Qing-Lin Yu Duan Gu Meng Zhang Ming-Hua Zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049China

Phase space is one of the most important parameters used to describe beam properties. Computer tomography, as a method for reconstructing phase space and measuring beam emittance, has been used in many accelerators over the past few decades. In this paper, we demonstrate a transverse phase space reconstruction study in the Shanghai soft X-ray free electron laser facility. First,we discuss the basic principles of phase space reconstruction and the advantage of reconstructing beam distribution in normalized phase space. Then, the phase space reconstruction results by different computer tomography methods based on the maximum entropy(ment) algorithm and the filtered back projection algorithm in normalized phase space are presented. The simulation results indicate that,with proper configuration of the phase advance between adjacent screens, the ment algorithm is feasible and has good efficiency. The beam emittance and Twiss parameters are also calculated using the reconstructed phase space.

关键词： Emittance Phase space reconstruction ment algorithm SXFEL

Preparation and optical properties of composite thin films with embedded InP nanoparticles

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第6期46卷 461-466页

作者： Maojun Zheng Lide Zhang Guanghai Li Zhi Jiang Chinese Acad Sci Inst Solid State Phys Hefei 230031 Peoples R China

InP nanoparticles embedded in SiO2 thin films were prepared by radio-frequency magnetron co-sputtering. We analyzed the structure and growth behavior of the composite films under different preparation conditions. X-ray diffraction and Raman spectroscopy analyses indicate that InP nanoparticles have a polycrystalline structure. The average size of InP nanoparticles is in the range of 3-10 nm. The broadening and red shift of the Raman peaks were observed, which can be interpreted by the phonon confinement model. Optical transmission spectra indicate that the opticalabsorption edges of the films can be modulated in the visible light range. The marked blue shift of the absorption edge with respect to that of bulk InP is explained by the quantum confinement effect. The theoretical values of the blue shift predicted by the effective mass approximation model are different from the experimental results for the InP-SiO2 system. Analyses indicate that the exciton effective mass of the InP nanoparticles is not

关键词： nanocomposite thin film sputtering phonon confine- ment effect quantum confinement effect.

走向21世纪的中国国际旅行卫生保健——中国国境卫生检疫工作改革与国际旅卫生保健发展

在线全文

学校读者我要写书评

暂无评论

旅行医学科学 1997年第3期3卷 97-101页

作者：宋明昌中国国际旅行卫生保健协会

美国《时代》周刊发表文章指出:21世纪,一个名副其实的全球性旅行时代来临。旅游业同石油和汽车一起被称为世界三大经济支柱产业。1996年,中国入境出境人员已达1.1亿人次,国际旅游收入超过100亿美元,国内旅游收入超过1600亿人民币。随... 详细信息

美国《时代》周刊发表文章指出:21世纪,一个名副其实的全球性旅行时代来临。旅游业同石油和汽车一起被称为世界三大经济支柱产业。1996年,中国入境出境人员已达1.1亿人次,国际旅游收入超过100亿美元,国内旅游收入超过1600亿人民币。随着我国认真贯彻党的"十五大",进一步扩大对外开放,国内外旅游业迅速发展,我国国际旅行卫生保健必将取得蓬勃发展。

关键词： China international travel health care frontier health and quarantine reform develop- ment

La bioéconomie ouvre la voie à un nouveau développement

在线全文

学校读者我要写书评

暂无评论

今日中国（法文版） 2022年第9期60卷 77-77页

作者： ZHOU JIN China Pictorial

Aujourd’hui,la société humaine est entrée dans une période de développement simultané,parallèle et superposé des économies agricole,industrielle,numérique et biologique(bioéconomie).

关键词： des ment indust