星载合成孔径雷达遥感及多卫星遥感数据融合方法

合成孔径雷达（ＳＡＲ）数据，以其特有的成像机理和对地物信息的属性描述及其全天时、全天候作业能力，形成了对传统多光谱遥感数据的互补。通过数据融合技术，可以优化遥感信息资源，实现多卫星遥感数据的优势互补，使遥感信息得到最大限度的利用，从而为地学研究中的各种模型方法和决策系统提供科学依据。根据信息的抽象程度不同，融合可分为原始数据融合、目标级融合和决策级融合三个层次。在不同的层次具有相对应的信息融合方法。     

数字地震台网大震前地脉动信息变化特征研究

通过计算机对数字地震台网产出的大动态、高分辨率、高精度的地震波形数据进行的实时采集跟踪分析，发现了有些台站大震前地脉动波形的周期和幅度有明显异常变化，探索大震前地脉动变化的特征和规律，将为区域性地震预报研究开辟一条新的途径。     

区域化探数据处理的几种分形方法

地球化学变量兼有随机性、确定性和区域结构性的特征，传统的数学方法难以精确地描述地球化学变量的空间分布规律，而新兴的分形几何是刻画空间不规则形体的一种比较有效的工具，且分维值可以表征空间不规则形体的确定性本质。基于分形原理，提出含量-总量法、空间分形插值法和分形趋势面法3种新的分形技术，应用于区域化探数据处理。在几个典型矿区应用后发现，上述分形方法不仅可以有效地模拟地球化学变量的空间分布特征，而且在保留原始有效异常信息的基础上可以更合理地区分地球化学变量的背景与异常，具有发现和强化弱异常信息的重要功效。     

工程岩体三维构模中钻孔数据处理方法

原始数据处理是工程岩体三维构模中存在的主要困难之一。从三维构模的角度,将工程岩体按几何特征抽象为4种结构单元类型。钻孔数据是描述工程岩体的重要原始数据,具有多尺度性。针对这个特点,提出钻孔数据纵向概化准则,解决工程岩体多尺度显示问题;根据地质学的地质数据解译方法,结合岩层层状分布的特点,提出层处理方法对钻孔数据进行概化处理,确定工程岩体所对应的结构单元类型,创建工程岩体结构单元三维构模数据,建立由钻孔数据所得到的工程岩体三维模型。     

GOCE Gravity Field Processing Strategy

A processing strategy and the corresponding software architecture for the processing of GOCE (Gravity field and steady-state Ocean Circulation Explorer) observables is presented and described, with the major objective to compute a high-accuracy, high-resolution spherical harmonic model of the Earth's gravity field. The combination of two numerical solution strategies, i.e. the rigorous solution of the corresponding large normal equation systems applying parallel processing (on a PC cluster) as the core solver, and the fast semianalytic approach as a quick-look gravity field analysis (QL-GFA) tool, is proposed. Such a method fusion benefits from the advantages of the individual components: the rigorous inversion of the system providing also the full variance-covariance information, and the quickness enabling the consecutive production of intermediate gravity field solutions, for the purpose to analyse partial and incomplete data sets and to derive a diagnosis of the performance of the GOCE measurement system. The functionality and operability of the individual components are demonstrated in the framework of a closed loop simulation, which is based on a realistic mission scenario both in terms of the orbit configuration and the coloured measuring noise. Special concern is given to the accuracy of the recovered coefficients, the numerical behaviour, the required computing time, and the particular role of the individual modules within the processing chain. In the case of the core solver, it is demonstrated that the assembling and rigorous solution of large normal equation systems can be handled by using Beowulf clusters within a reasonable computing time. The application of the quick-look tool to partial data sets with short-term data gaps is demonstrated on the basis of several case studies. Additionally, the spectral analysis of the residuals of the adjustment is presented as a valuable tool for the verification of the noise characteristics of the GOCE gradiometer.     

Evidence for freeze–thaw events and their implications for rock weathering in northern Canada

Discussions regarding weathering in cold environments generally centre on mechanical processes and on the freeze–thaw mechanism in particular. Despite the almost ubiquitous assumption of freeze–thaw weathering, unequivocal proof of interstitial rock water actually freezing and thawing is singularly lacking. Equally, many studies have used the crossing of 0 °C, or values close to that, as the basis for determining the number of ‘freeze–thaw events’. In order to assess the weathering regime at a site in northern Canada, temperatures were collected at the surface, 1 cm and 3 cm depth for sets of paving bricks, with exposures both vertical and at 45°, orientated to the four cardinal directions. Temperature data were collected at 1 min intervals for 1 year. These data provide unequivocal proof for the occurrence of the freezing and thawing of water on and within the rock (freeze–thaw events). The freeze event is evidenced by the exotherm associated with the release of latent heat as the water actually freezes. This is thought to be the ?rst record of such events from a ?eld situation. More signi?cantly, it was found that the temperature at which freezing occurred varied signi?cantly through the year and that on occasion the 1 cm depth froze prior to the rock surface. The change in freeze temperature is thought to be due to the chemical weathering of the material (coupled with on‐going salt inputs via the melting of snowfall), which, it is shown, could occur throughout the winter despite air temperatures down to ?30 °C. This ?nding regarding chemical weathering is also considered to be highly signi?cant. A number of thermal stress events were also recorded, suggesting that rock weathering in cold regions is a synergistic combination of various chemical and mechanical weathering mechanisms. Copyright © 2003 John Wiley & Sons, Ltd.     

鄂尔多斯盆地北部黄土沙漠区隐蔽薄气层预测

长庆油田公司针对黄土沙漠区低孔、低渗、薄气藏的地震目标处理,经过多年的探索与实践,已形成了一套适合该类气藏特点的储层横向预测技术。在榆林、乌审旗、苏里格庙和神木等地区的上古生界天然气勘探、开发阶段取得了显著效果,使长庆油田上古生界天然气储量连续八年保持稳定增长。本文详细剖析了该技术的应用效果及经验。     

A comparative study on the illite crystallinity and the clay mineral reflectance spectral index for subdividing the very low-grade metamorphic belt along the Lizhou-Hekou geological section in the Youjiang sedimentary basin, Guangxi, China

To examine the application potential of hyperspectral remote sensing techniques in classifying very low-grade metamorphic belts, the composition of clay minerals and the cyrstallinity of illite from mudstones were measured using XRD and VIS-SWIR (400-2500 nm) reflectance spectroscopy. Based on the illite cyrstallinity, Kubler Index (KI), the Early Triassic LuoLou Group and the Middle Triassic lower Baifeng Formation were classified as the lower Epizone with KI△2θ° ranging from 0.22 to 0.25, the upper Baifeng Formation as upper anchizone with KI△2θ°ranging from 0.26 to 0.33, and the Hekou Formation as lower anchizone with KI△2θ° ranging from 0.38 to 0.40. According to a KI△2θ° value of 0.43, it is possible that there may exist a local diagenetic zone in the upper strata. The illite cyrstallinity Kubler index and the metamorphic grade increase from the bottom to the top of the stratigraphic sequence. The metamorphic grade boundaries nearly match the stratigraphic boundaries, indicating a burial metamorphism nature for the stratigraphic sequence. From the bottom to the top of the sequence, the spectral absorption band center of clay minerals from fresh rocks is around 2200 nm. The absorption band centers change towards shorter wavelengths: the Luolou Group being at 2220 nm, the Baifeng Formation at 2217-2213 nm, the lower member of the Hekou Formation at 2214-2206 nm, and the upper member of the Hekou Formation at 2205-2197 nm. The spectral absorption band center of illite shows the same change pattern. These results indicate that very low-grade metamorphic belts can be subdivided using spectral indices of clay minerals, which are measured by using field portable spectroradiometers. However, it may not work well with satellite and airborne sensors.     

运用改进系统建模法对南海气象数据的建模研究

在系统建模理论的基础上,运用改进的动态数据建模方法,对南海气象数据中的温度进行建模并验证了模型的适用性.根据模型推导出格林函数、逆函数和自协方差函数等,并讨论了南海气象数据中温度模型的稳定性、可逆性和合理性.对系统的频率特性和谱函数进行分析讨论,并给出建模过程中的一些图像.根据模型的适用性检验发现,对所研究的气象数据而言,ARMA(4, 3)模型是最合适的,具有平稳可逆性.所有的建模和分析过程在MATLAB上实现.实验结果表明这种建模方案简便易行,能够快速准确地确定系统的合理模型.     

基于GPRS的远程气象观测数据实时采集传输系统及其应用

通过对远程自动气象站数据实时采集传输通讯方式的比较，提出基于通用分组无线业务（GPRS）的远程自动气象站数据实时采集和传输系统的技术方案，以小数据流方式，实现野外自动气象站观测数据的实时采集、传输和对观测设备运行的监控，达到节约经费，提高数据传输时效的目的，并将此系统成功地用于苏通长江公路大桥施工期气象环境监测与预警系统中。