利用地下水预报河南登封4.7级地震的资料分析过程

通过对１９９２年河南登封４．７级地震的资料分析，表明拐河老井地下水位变化是区域应力场的变化效应。在时间上有连续性，在空间上和构造体系上有一定的相关性     

地震孕育体源流变模型--位移与应变场

由于岩石介质在温度较低、压力不大、外力作用时间不长的情况下,主要显示为弹性性质;但在温度高、压力大、作用力时间长的情况下,则显示出流变性质.对于持续数十秒的快速错动的地震发生过程,用弹性理论处理发震过程是恰当的,但对于持续数百年乃至上千年的孕震过程,岩石的流变性是必须考虑的问题(张国民,1987;尹祥础,郑天愉,1982;梅世蓉等,1993).     

Parameters of Land-Surface Processes for Gobi in North-West China

Using data from the intensive observation period (May–June 2000) of the NWC-ALIEX (The Field Experiment on Interaction between Land and Atmosphere in Arid Region of North-west China), the characteristics and mechanisms of some key land-surface process over Gobi in a typical arid region of north-west China are analyzed and several parameters of land-surface processes are calculated. The weighted mean of the surface albedo over a typical arid region of the Dunhuang Gobi is calculated using the relative reflection as a weighting factor, and its value is 0.255 ± 0.021. After removing the influence of precipitation, the mean soil heat capacity over a typical arid region of the Dunhuang Gobi is 1.12 × 10⁶ J m^-3 K^-1,which is smaller than that observed in the Heihe (China) River basin Field Experiment (HEIFE). The mean soil heat diffusivity and conductivity are about half of those observed in HEIFE.     

第二松花江干流区地下水信息管理数据库系统开发与研制

介绍了第二松花江干流区地下水信息管理数据库系统的开发环境及总体设计。在分析与地下水有关的数据信息的基础上,提出了较为合理的地下水信息管理数据库系统的结构。将该系统按其功能分为5个子系统基础子系统、数据信息管理子系统、区域信息管理子系统、动态绘图子系统、水资源评价子系统,并对5个子系统的功能进行了详细阐述。     

土体各向异性的再认识

土体原生和次生各向异性有本质不同。从柔度矩阵的角度分析了弹性和弹塑性理论对各向异性的反映 ;复杂应力状态下砂土真三轴试验结果表明 ,次生各向异性对土体应力应变关系有很大影响 ,是土体特性的本质体现 ,在土工数值分析中应当充分考虑其影响。     

碎石桩复合地基抗液化设计方法的分析

对碎石桩复合地基抗液化设计方法进行了分析评价 ,并对施工技术作了介绍。基于复合地基抗地震液化作用的分析 ,提出一种合理的抗液化设计方法 ,该方法能够体现碎石桩复合地基的加密、排水和减震三方面的抗地震液化作用。     

四川内江松柏寨旅游资源特征及开发浅论

详细介绍了内江松柏寨的七山、七堰、八景等自然景观；对以般若寺为代表的寺庙、寨门以及历代名人所留下的行踪和墨迹作了生动描写；提出以生态旅游为理念进行统一规划，并采取保护性开发的若干建议。     

A fast intensity-hue-saturation fusion technique with spectral adjustment for IKONOS imagery

Among various image fusion methods, intensity-hue-saturation (IHS) technique is capable of quickly merging the massive volumes of data. For IKONOS imagery, IHS can yield satisfactory "spatial" enhancement but may introduce "spectral" distortion, appearing as a change in colors between compositions of resampled and fused multispectral bands. To solve this problem, a fast IHS fusion technique with spectral adjustment is presented. The experimental results demonstrate that the proposed approach can provide better performance than the original IHS method, both in processing speed and image quality.     

Acidification and Trace Metals of Lakes in Taiwan

One hundred and eighty lakes, ponds and reservoirs in Taiwan, and the offshore islands have been investigated since 1985. Effects such as warming/cooling, mixing, photosynthesis and respiration on pH have been identified. These effects were found to be less profound than those resulting from the geology. Since there is little rain or lake water pH data available prior to 1970, it was necessary to use proxy data in order to ascertain the history of lake acidification. In this study, we present data based on diatoms in a sediment core collected from a lake in the remote subalpine region of southern Taiwan. The acidity of this lake water was found to have increased since 1900. We measured the concentrations of 55 chemical species in lake water samples. In addition, concentrations of 26 chemical species were obtained from sediments. Conductivity, alkalinity (HCO₃ ^?), most other major and minor chemical species, as well as the non sea-salt SO₄/Na ratio in lake water clearly decrease with elevation. Distribution of pH is similar, although the trend is less clear. Distribution of trace metals, however, shows a different trend as anthropogenic pollution, diagenetic reduction and lake acidification are at play.     

The Singapore River thematic zone: sustainable tourism in an urban context

This paper explores the concept of sustainable tourism and how it applies to urban destinations such as Singapore. As tourism is an important industry in Singapore, in terms of employment, business activity and an income generator, the Singapore Tourism Board is continuously looking at potential avenues to make Singapore a competitive destination. We examine the use of thematic zones in Singapore as a strategy to achieve its ambition of becoming a tourism capital of the world. By focusing on a case study of the Singapore River thematic zone (one of the 11 thematic zones identified by the Singapore Tourism Board), we assess the viability of thematic zones in ensuring sustainable urban tourism. The paper closes with some theoretical reflections and policy implications arising from our key findings.