基于本体范畴的地理信息系统语义集成方法

为实现地理信息系统之间的语义集成,本文提出了地理本体范畴定义:即范畴中的对象描述地理本体,对象之间的态射描述地理本体之间的映射,且态射能描述地理本体间的多种语义关系;并设计了利用外推实现地理本体集成的算法,该算法既能集成同义关系,也能实现语义非对称关系的集成;最后以不同分类标准的干出滩本体为具体案例,阐述了算法的实现步...     

英语介词语义范畴转换研究

英语介词数量较大，用法灵活，长期以来一直是TEFL教学的一项重要内容。英语介词的语义及其语义范畴不是固定的、一成不变的，在不同的语言环境下，它们的语义范畴会呈现不同的类型特征，从语言学的角度来看，英语介词语义范畴转换具有自身的规律和特点。充分了解和掌握英语介词语义范畴转换有助于学习者更加全面、准确地理解和使用英语介词。     

Correct application of the IUCN protected area management categories to the CCAMLR Convention Area

The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) has been working to develop and implement a system of marine protected areas (MPAs) for over 10 years. Within CCAMLR there is a long-held belief that the area covered by the CCAMLR Convention is equivalent to a category IV protected area as defined by the International Union for Conservation of Nature (IUCN). This belief was founded upon a comparison of the central objective of CCAMLR as defined by the CCAMLR Convention with the IUCN definition of a category IV MPA. This advice was accepted by the CCAMLR Scientific Committee but to date there has not been any analysis of this advice within CCAMLR, IUCN or in the literature. This paper critically analyses that advice, and finds that the CCAMLR Convention area does not meet the IUCN definition of an MPA and thus the CCAMLR Convention Area cannot be considered equivalent to a category IV MPA.     

海上某区二维地震多次波的识别和压制

多次波的识别和压制是陆上,特别是海洋地震勘探中需要解决的突出问题之一。首先结合某区二维深海地质资料,采用变偏移距叠加剖面、叠加速度谱、自相关分析和二维频率波数域等方法手段,对波场的特征、多次波的类型和性质进行了识别分析。然后,对于不同类型的多次波匹配地选择预测反褶积、频率波数域滤波和加权混波等方法加以压制。发挥各自方法的优点,实现了多种方法的整体综合优化,达到最大限度地压制多种类型多次波的目的。较好的实际压制效果表明上述工作思路和处理方法是有效可行的。     

The statistical relationship between unconfined compressive strengths and the frequency distributions of slope gradients — A case study in northern Hungary

This paper focuses on the question of whether there is a deterministic connection between the slope gradient and unconfined compression strength (UCS) as a lithological factor and on describing the nature of this connection. Moreover, the authors determined the sensitive statistical parameters in the statistical surface analyses. The surface analyses were carried out in an area extending over 1500 km² in northern Hungary and containing parts of the uplifted Palaeozoic and Mesozoic basement and the semi-consolidated material of the Palaeogene and Neogene molasse sediments.The 67 geological formations of the area were grouped into 10 petrophysical categories characterised by unconfined compressive strength as a petrophysical parameter. The geological database was the digitalized geological map of North Hungarian Region (1 : 100 000). The digital topographic database was based on 10 m contour lines of 1 : 50 000 maps, the digital elevation model was generated by kriging interpolation. Three topographic models were created with resolutions of 25 × 25, 50 × 50 and 100 × 100 m per pixels.Evident correlation can be shown between the UCS and the relative frequency of the slope gradient. The adequate regression procedure is the power regression for low slope category values while logarithmic regression is applicable at high slope angles. Based on the characteristic of the relationship and the value of r², slope category intervals can be identified the relative frequency of which is proven to be determined by the UCS. These intervals are found to be between 4–10%, 10–16%, 16–22%, 22–44% and over 44%.Using the determination equations of slope gradient between 4–10% and over 44%, the UCS of the bedrock can be calculated approximately as the average value of the two calculated results. So the quotient of the frequency of these two category intervals can be regarded as an important morphometric index for a given bedrock.From the aspect of petrophysical characteristics, the rock with UCS between 6 and 86 MPa were proven to be deterministic for the slope development i.e. in the determination of the slope category frequencies. Applying the relative frequency of slope gradients a relative erosion resistance of the petrophysical categories can be calculated.Considering the determination coefficients, among the statistical parameters of the distribution of slope category values the standard deviation, mode, mean and median proved to be determined by the UCS of the bedrock.     

灰色系统理论在水质评价中的应用

灰色聚类与综合指数法、模糊综合评判法相比是一种较为客观的水质评价方法，本文运用它对抚州市地表水质进行了评价，结果令人满意。     

用NOAA卫星气象资料计算复杂地形下的流域蒸散

本文提出一种采用NOAA卫星AVHRR和地形高度等资料,估算流域蒸散的方法。NOAA AVHRR资料用于地表覆盖分类,据此可得出各类下垫面由可能蒸发转换成实际蒸散的折算因子。该资料还可用于计算地面反射率和气温,本文利用与卫星象元相匹配的1.2'经纬度网格上的海拔高度资料将流域内少数气象站观测的气象要素作为高度的函数插到此网格上,然后用改进的彭曼模式计算了甘肃省河西内陆河10个流域中各类下垫面的蒸散和蒸发。然后与少数雪面和高山草甸区实测的资料以及用水份平衡方法估算的相应流域的蒸散比较,验证了用此方法估算逐月流域蒸散量的可靠性。     

COMPILATION OF HEAT FLOW DATA IN THE CHINA CONTINENTAL AREA (2nd Edition

During the last 2 years, heat flow data increased significantly in China as a result of implementation of many comprehensive geodynamic (including geothermal) projects and GGT project in China. In this paper, a total of 366 reliable heat flow data is collected from published and in press sources in the Compi-ilation of Heat Flow Data in the China Continental Area (2nd edition). Statistic analysis of these data shows that the heat flow values in China continental area vary from 20 to 14...     

GIS程序符号的设计与实现

提出了一种程序符号设计与管理方案,解决了复杂符号的制作问题,利用GIS软件Geostar5.0开发了程序符号系统,验证了该方案的可行性与实用性。     

妙峰山景区公路K08+850m~905m段边坡崩塌稳定性评价

北京市山区分布景区众多,景区公路多以开挖山体边坡修建而成,存在较多崩塌隐患。本文以存在崩塌隐患较大且具有代表性的门头沟区妙峰山景区公路为例,分析其中K08+850m~905m段边坡崩塌形成的力学机制,确定崩塌类别,采用赤平投影法和极限平衡法两种边坡稳定性评价方法,结合北京特殊的气候,分析评价该边坡的稳定性,通过现场定性判别与定量计算相结合的方法评价其稳定性,为北京市景区公路崩塌稳定性评价提供参考。