湖南环洞庭湖区工业调整与布局优化研究   总被引：2，自引：0，他引：2  

高昌海谢光辉  刘新平谢炳庚 《热带地理》2001,21(3):227-231

在分析环洞庭湖区内工业现状的基础上,采用主分量分析法(PCA)和区位商评价工业发展条件的地域差异和分析主导产业的发展方向,提出区内各市工业调整与布局优化的重点.  相似文献   

湖南环洞庭湖区工业调整与布局优化研究     

高昌海  谢光辉  刘新平  谢炳庚 《热带地理》2001,21(3):227-231

在分析环洞庭湖区内工业现状的基础上，采用主分量分析法（PCA）和区位商评价工业发展条件的地域差异和分析主导产业的发展方向，提出区内各市工业调整与布局优化的重点。  相似文献   

A MATHEMATICAL MODEL OF RESERVOIR SEDIMENTATION     

HUANG Jincbi China Institute of Water Resources  Hydroelectric Power Research  Fuxinglu A-  Beijing  China. E-Mail: HJC@IWHR.COM 《国际泥沙研究》2001,16(2)

1 INTRODUCTIONBed aggradation and degradation haPpen to be the most imPOrtant aspects of the alluvial processes instreams if the equilibrium conditions among water discharge, sediment flow, and channel shaPe areclistuIbed by natural or man-made factOfs, e.g., the constrUchon of a dam, change in the sediment suPplyrate, or base level changing. Reliable and quanhtative estimation of the bed aggradation or degradation isimPortant in rivertalning engineering and water management projects. …  相似文献   

EXPERIMENTAL STUDY ON EQUILIBRIUM CONCENTRATION OF DEBRIS FLOWS   总被引：1，自引：0，他引：1  

Bin YU Assoc Prof.  Chengdu Institute of Mountain Disaster  Enviromnent  CAS    P.O. Box  P. R. China.E-mail: drbinyu@sc.homeway.com.cn 《国际泥沙研究》2001,16(2)

Discussion open until 2002.EmunmL SwrY ONEQUII.thare CONCENTRATION OF DEBRIS rrOWSBin YU1AaSTsiCTThe paPe PresentS experimntal study of debris flows. The equiMm concentIation of solidparticle in the now is a hahon of the energy slope, density of solid Particle and kinetic ffichonange of paxtiles. The kinhc forhon angle is a funhon of intemal ffichon angle, the cOnCentrationof solid phocles and the mtalmum POssible concewhon. TO deteImin th6 hahon between thekinetic fficho…  相似文献   

EXPERIMENTAL STUDY ON INCIPIENT MOTION OF SEDIMENT PARTICLES ON GENERALIZED SLOPING FLUVIAL BEDS   总被引：3，自引：0，他引：3  

Subhasish DEY Asst. Prof.  Dept. of Civil Engrg.  Indian Inst. of Tech.  Kharagpur  West Bengal  India. Fax: +   《国际泥沙研究》2001,16(3)

1 INTRODUCTIONWhen water flows over a fluvial bed, hydro-dynandc force induced by the flow is acting on thesediment particles lying on the bed. A further increase in flow velocity results in an increase in themagnitude of this fOrce; and sediment particles begin to move if a situation is eventu8lly reached whenthe hydro-dynandc force exceeds a certain critical value. This initial movement of sediment pallicles istermed inciPient motion. The erosion and sedimentation of nuvial beds can be…  相似文献   

Pygostyle-like Structure from Beipiaosaurus (Theropoda, Therizinosauroidea) from the Lower Cretaceous Yixian Formation of Liaoning, China     

XU Xing  CHENG Yennien  WANG Xiaolin  CHANG Chunhsiang Institute of Vertebrate Paleontology  Paleoanthropology  Chinese Academy of Sciences  Beijing  Chin  E-mail: xu.xing@ivpp.ac.cn Division of Geology  National Museum of Natural Science  Taichung  China Wang Si''en  Xie Guanglian 《《地质学报》英文版》2003,77(3):294-298

Pygostyle was previously considered as a unique structure of ornithothoracine birds, used to maneuver tail feathers. A similar structure from an oviraptorosaurian dinosaur was considered functionally associated with the rectrices as in birds. We report a pygostyle-like structure from a therizinosauroid dinosaur. The presence of filamentous integuments, but absence of rectrices, on the tail of this therizinosauroid, combined with other lines of evidence, suggests that the initial function of the pygostyle was not related to the rectrices.  相似文献   

A New Protoceratopsid (Dinosauria: Neoceratopsia) from the Late Cretaceous of Inner Mongolia, China     

YOU HailuInstitute of Geology  Chinese Academy of Geological Sciences  Baiwanzhuang Ro  Beijing  E-mail: hyou@sas.upenn.eduand DONG ZhimingInstitute of Vertebrate Paleontology  Paleoanthropology  Chinese Academy of Sciences  Beijing Wang Si''en  Xie Guanglian 《《地质学报》英文版》2003,77(3):299-303

An almost complete skull, which was collected from the Upper Cretaceous of the Bayan Mandahu area in Inner Mongolia, China by the Sino-Canadian Dinosaur Project, is described and assigned to a new genus of protoceratopsid dinosaur, Magnirostris dodsoni gen. et sp. nov. This new taxon is distinguished from other protoceratopsids by the robust rostral bone and the existence of incipient orbital horn cores. The existence of an additional antorbital fenestra indicates a close relationship between Magnirostris and Bagaceratops.  相似文献   

Role of Water in Deformed Omphacite in UHP Eclogite from the Dabie Mountains, Eastern China   总被引：2，自引：0，他引：2  

SU Wen  YOU Zhendong  CONG Bolin  YE KaiLaboratory of Lithosphere Tectonic Evolution  Institute of Geology  Geophysics  Chinese Academy of Sciences  Beijing  E-mail: suwen@mail.igcas.ac.cnChina University of Geosciences  Wuhan  Hubei Xie Guanglian 《《地质学报》英文版》2003,77(3):320-325

Omphacite grains from UHP eclogite of the Dabie Mountains in eastern China are elongated and show strong lattice preferred orientations (LPOs). Observations by the transmission electron microscopy (TEM) identified not only structures of plastic deformation occurring as free dislocation, dislocation loops and dislocation walls, but also bubbles of water present in the deformed omphacite. The bubbles attach to the dislocation loops which are often connected to one another via a common bubble. Using infrared spectroscopy (IR), two types of hydrous components are identified as hydroxyl and free-water in the omphacite. An analysis of deformation mechanism of microstructure in omphacite suggests that the mineral deformed plastically under UHP metamorphic conditions by dislocation creep through hydrolitic weakening.  相似文献   

Cyclic Sequences, Events and Evolution of the Sino-Korean Plate, with a Discussion on the Evolution of Molar-tooth Carbonates, Phosphorites and Source Rocks   总被引：4，自引：0，他引：4  

MENG Xianghua  GE MingInstitute of Sedimentary Basin  China University of Geosciences  Beijing  E-mail: mengxh@cugb.edu.cn Liu Xinzhu  Zhu Xiling 《《地质学报》英文版》2003,77(3):382-401

This paper gives an account of the research that the authors conducted on the cyclic sequences, events and evolutionary history from Proterozoic to Meso-Cenozoic in the Sino-Korean plate based on the principle of the Cosmos-Earth System. The authors divided this plate into 20 super-cyclic or super-mega-cyclic periods and more than 100 Oort periods. The research focused on important sea flooding events, uplift interruption events, tilting movement events, molar-tooth carbonate events, thermal events, polarity reversal events, karst events, volcanic explosion events and storm events, as well as types of resource areas and paleotectonic evolution. By means of the isochronous theory of the Cosmos-Earth System periodicity and based on long-excentricity and periodicity, the authors elaborately studied the paleogeographic evolution of the aulacogen of the Sino-Korean plate, the oolitic beach platform formation, the development of foreland basin and continental rift valley basin, and reconstructed the evolution  相似文献   

Light Hydrocarbons in Fluid Inclusions and Their Constraints on Ore Genesis: A Case Study of the Songxi Ag (Sb) Deposit, Eastern Guangdong, China     

SUN Xiaoming  David I. NORMAN  SUN Kai  WANG Min  CHEN Binghui  CHEN Jingde  YU Shoujun Department of Earth Sciences  Sun Yat-sen University  Guangzhou  Guangdong  Chin  E-mail: eessxm@zsu.edu.cn  State Key Laboratory for Mineral Deposits Research  Nanjing University  Nanjing  Jiangsu  Chin  Department of Earth  Environmental Sciences  New Mexico Institute of Mining  Technology 《《地质学报》英文版》2003,77(2):227-236

The Songxi deposit is a newly discovered large Ag (Sb) deposit. By using a suite of high-vacuum quadrupole gas mass spectrometer systems, the authors have recognized many kinds of light hydrocarbons in fluid inclusions of minerals. These hydrocarbons are mainly composed of C1-C4 saturated alkanes, while the contents of C2-C4 unsaturated alkenes and aromatic hydrocarbons are quite low, suggesting that the metallogenic processes have not been affected by magmatic activities. Chemical equilibrium studies show that these hydrocarbons may be a mixture of organic gases generated by microorganism activity and those by thermal cracking of type-n kerogens (kukersite) in sedimentary host rocks, and the former may constitute more than two-thirds, implying that microorganism might have played an important role in the metallogenesis. The equilibrium temperature of the latter is about 300℃, which is much higher than the geothermal temperature at the estimated depth of metallogenesis. Thus, the light hydrocarbons gen  相似文献