BOOK REVIEWS     

《The Professional geographer》1988,40(4):471-499

Books reviewed in this article: USA, Eine Geographische Landeskunde , Vol. I, Der Grossraum in Strukturellem, Wandel, 3rd Ed. Helmut Blume . Introduction to Remote Sensing . James B. Campbell . The Sounds of People and Places: Readings in the Geography of American Folk and Popular Music . George O. Carney , ED. Development and Underdevelopment . John Cole . Mobility and Employment in Urban Southeast Asia: Example from Indonesia and the Philippines . Michael A. Costello , Thomas R. Leinbach , AND Richard Ulack . Soviet Asia: Economic Development and National Policy Choices . Leslie Dienes . The Third World City . David Drakakis -Smith . Scholars' Guide to Washington, DC for Cartography and Remote Sensing Imagery (maps, charts, aerial photographs, satellite images, cartographic literature and geographic information systems). Ralph E. Ehrenberg . Population and Development in the Third World . Allan AND Anne Findlay . The Early Mapping of Hawaii . Gary L. Fitzpatrick . Energetics of Physical Environment: Energetic Approaches to Physical Geography . K. J. Gregory , ED. Wildland Recreation: Ecology and Management . William E. Hammitt and David N. Cole . Agricultural Commercialization and Government Policy in Africa . J. Hinderink AND J. J. Sterkenburg . The Dynamics of American Housing . James W. Hughes AND George Sternlieb . Thailand: Buddhist Kingdom as Modern Nation State . Charles F. Keyes . Resolving Locational Conflict . Robert W. Lake , ED. Lands at Risk in the Third World: Local-level Perspectives . Peter D. Little and Michael M. Horowitz , EDS. Nathaniel Southgate Shaler and the Culture of American Science . David N. Livingstone . Regions: The Economics and Politics of Territory . Ann R. Markusen . Wetlands . William J. Mitsch and James G. Gosselink . Historical Geography: Progress and Prospect . Michael Pacione , ED. Loess and Periglacial Phenomena . Marton P$eacsi and Hugh M. French , EDS. Regional Management of Metropolitan Floodplains, Experience in the United States and Abroad . Rutherford H. Platt , ED. Human Cartography: Mapping the World of Man . Janos Szegö . Atlas of Great Lakes Indian History . Helen H. Tanner , ED. The Botany of Mangroves . P. B. Tomlinson . Urban Spatial Traffic Patterns . Rodney Vaughan . The Night After … Climatic and Biological Consequences of a Nuclear War . Yevgeni Velikhov , ED. Industrial Geography . H. D. Watts . Dictionary of Quotations in Geography . James O. Wheeler and Francis M. Sibley . Vermont Townscape . Norman Wiliams , Jr. , Edmund K. Kellogg and Peter M. Lavigne .  相似文献   

A method for preparing large numbers of otolith sections for viewing by scanning electron microscope     

Ashford  J. R.; Robinson  K.; White  M. G. 《ICES Journal of Marine Science》1993,50(2):227-229

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DETERMINANTS OF LAND USE CHANGE IN GUATEMALAN SECONDARY URBAN CENTERS     

Gary S. Elbow 《The Professional geographer》1983,35(1):57-65

The Griffin and Ford model of Latin American internal city structure is used to examine the role of private sector institutions and public agencies as contributors to change in secondary level urban places in Guatemala. The private sector affects change primarily through locational choices in the siting of industry and housing. Public agencies influence change through control of municipal finances and decision making, especially in the construction of public works projects. The findings tend to support the Griffin and Ford model.  相似文献   

地质全息论     

王海侨  钟建华  温志峰 《地学前缘》2008,15(3):370-379

以自然界中全息现象存在的普遍性为指导,以客观存在的地质现象为依据,从全息的角度来对地质现象进行分析,正式提出了地质全息理论,认为地质体形态、地质信息和地质活动的频率等其局部与整体之间具有相似性或对应性,而且这种"整体(全息系统)"和"局部(全息元)"是相对的,与实际大小无关。这三种全息分别称为地质形态全息、地质信息全息和地质时间全息。任何地质体都是地质历史中不同种类、不同级别的地质全息系统的先后和交互作用下的结果,因此在某种具体的地质对象研究中确定其主控全息系统及其级别就显得非常重要。地质全息理论可以为地质学相关研究提供一个全新的理论依据和参考手段。  相似文献   

Analysis of key parameters in a diffusion type beach profile evolution model     

Harshinie Karunarathna  Jose M. Horrillo-Caraballo 《Continental Shelf Research》2011,31(2):98-107

Diffusion type formulations are commonly used in beach profile evolution models. The practical idea behind that is to map the behaviour of the beach profile onto a simple mathematical model that exhibits the same behaviour under defined operating conditions. The success of this approach is based on the accurate determination of key parameters in the diffusion model that govern its behaviour, using observed beach behaviour in the field. In order to determine these parameters, i.e. diffusion coefficient and a time and space varying source function, we used observations of historic beach profiles at Milford-on-Sea beach in Christchurch Bay, Dorset, United Kingdom. The relationship between the diffusion coefficient and Dean's equilibrium profile was investigated, leading to a new interpretation of the diffusion coefficient in terms of the sediment characteristics. The analysis also shows the significance of the diffusion process in the medium to long term evolution of the beach profile. A canonical correlation analysis (CCA) was undertaken in order to identify patterns of behaviour between wave conditions and source terms, and the possible correlations between them. The analysis provides strong evidence of a useful link between the source term in the simple dynamical equation and the distribution of wave steepness.  相似文献   

AMBIDEXTROUS DALLAS*     

BRET WALLACH 《Geographical review》2009,99(4):459-480

ABSTRACT. Since its founding, Dallas, Texas has grown centrifugally. Since the 1990s, however, it has also grown centripetally, with developers building walkable, mixed‐use islands in the midst of metropolitan sprawl. This article surveys what amounts to a historic change of habit.  相似文献   

TM图像中桥梁目标识别方法的研究   总被引：18，自引：3，他引：15  

吴皓  刘政凯  张荣 《遥感学报》2003,7(6):478-484

提出了一种新的TM图像中桥梁目标的识别方法。算法充分利用了TM图像的特点,在底层处理中运用形态学的方法提取出潜在桥梁目标;在中层处理中使用链码表示目标并提取其特征参数;最后在高层处理中进行桥梁识别和一些后处理。算法识别速度快、准确率高,整个算法可以进行自动的识别,也可以有少量人工干预使得算法更稳健。实验证明该算法对于TM图像中的桥梁识别是很有效的。  相似文献   

基于数学形态学的遥感影像边缘检测研究   总被引：1，自引：0，他引：1  

张莉  贾永红  程刚 《地理空间信息》2006,4(4):52-54

针对含有复杂地物、边缘密度大的遥感影像,提出了一种基于多结构元素形态学的边缘检测方法。首先,根据遥感影像的特点,用形态学的开闭滤波器去除影像中的噪声点。然后基于多结构元素形态学进行边缘检测,最后,对边缘检测结果进行二值化及细化处理。并同Sobel及Canny算子的检测结果进行了比较。结果证明,该方法能有效地提取边缘、保护细节。  相似文献   

熔体形态学及其对岩石物理和力学性质的影响   总被引：1，自引：0，他引：1       下载免费PDF全文

周平  杨晓松  王多君 《地球物理学进展》2006,21(3):790-797

简要回顾了熔体形态学的研究方法，并分别从熔体分数和熔体分布形态两个方面，综合前人在熔体对岩石物理和力学性质的影响领域的主要研究成果，认为在部分熔融初期，熔体分数小，熔体主要分布于孤立的熔体囊内，对岩石的电学性质和力学性质影响不大，但是，对岩石的弹性波波速影响却很明显；随着熔体分数的增大，孤立的熔体囊逐渐连通形成熔体管道网络，岩石的电学性质发生显著变化；当熔体分数增至某一临界数值时，岩石体系结构改变，岩石的力学性质发生突变.  相似文献   

The effect of subaerial exposure on the morphology and microstructure of stromatolites in the Cretaceous Sinyangdong Formation,Gyeongsang Supergroup,Korea1     

O. NEHZA  K. S. WOO 《Sedimentology》2006,53(5):1121-1133

Stromatolite morphology is usually controlled by a number of biological and environmental factors. In the south‐eastern part of the Korean Peninsula, three stromatolite units of the Cretaceous Sinyangdong Formation have been studied with regard to the effect of diagenesis on their morphology. Here, it is proposed that subaerial exposure and meteoric diagenesis are the most significant factors in shaping the stromatolites of the Cretaceous Sinyangdong Formation. Most previous palaeontological and sedimentological studies on stromatolites have concentrated on the environmental and biogenic controls on stromatolite morphology. These include extrinsic factors such as sedimentation rates or current velocities. The main controlling factor on the morphology of the stromatolites in the Sinyangdong Formation is apparently transient subaerial exposure and related meteoric diagenesis. Textural examination of stromatolite samples from three stratigraphic horizons shows a characteristic repetitive pattern of cycles with gradual transition from fibrous calcite to micrite layers, reflecting changes in the hydrological cycle of the lake in which the stromatolites grew. Stromatolite growth was terminated by corroded surfaces indicative of subaerial exposure related to a fall in lake level. The growth pattern of the stromatolites was mostly determined by the morphology of the corroded substrates during subaerial exposure. Furthermore, the internal stromatolite structure was strongly modified by the process of leaching. As a result, growth forms mostly changed from stratiform to columnar mesostructure. This study strongly implies that diagenesis could make a very significant influence on the morphogenesis of lacustrine stromatolites in the geological past.  相似文献