徐淮地区冬小麦叶龄与有效积温的样条模式

分析冬小麦越冬前叶龄变化，温度有效性随播期，发育期变化及其对叶龄的影响。用样条回归方法，建立了叶龄与有效积温模式，并用该模式确定冬小麦适播期以及插补缺测的叶龄。     

物理量图形在暴雨分析中的应用

通过“面拟合物理蛳诊断和三维图形显示系统”获得适合华东区域使用的多种物理量咕维图形，摸索用立体图形制作天然气预报的着眼点，初步分析表明物理量立体图是有非常广阔应用前景的工具之一。     

利用非线性拟合方法由BHT资料推算地层的平衡温度

实际地层温度在地热调查与碳氢化合物熟化程度的研究中非常有用。目前已有几种从BHT资料获取地层实际温度的计算方法。本文从这些公式出发实现了用非线性拟合处理方法求取地层平衡温度,给出了实际计算结果,并认为密特篮顿公式更适宜于用非线性拟合方法处理。     

趋势面分析在山西朔州王坪井田构造研究中的应用

针对王坪井田3号煤层底板起伏变化大．严重影响开拓及采煤巷道布置的现状．利用趋势面分析的方法．分析了井田内的构造展布规律．研究表明．井田在主向斜的基础上．存在次级背斜和NE和NW两组断裂．与本区受到多期次的构造应力场作用相吻合．得出的3号煤层底板高程二次趋势面方程．可为3号煤层开拓及采煤巷道的设计提供地质依据．     

应用样条函数处理GPS共视数据

为克服Vondrak方法平滑GPS共视比对数据的两端效应和缺值点处的插值问题,应用样条函数平滑和插值方法对NTSC和CRL的GPS共视数据进行了分析研究。结果表明:这种方法可解决Vondrak平滑方法的两端效应现象;与CircularT的数据比较,用样条函数平滑数据之后,再进行三次样条插值,缺值点的内符合精度有所提高,整体内符合精度也有所提高。     

SARS疫情预测预报中的分段非线性回归方法

介绍了几种对累计SARS疫情预测预报中的非线性增长曲线模型，说明了Richards增长曲线在这次SARS疫情预测预报中合理性和可行性，由此建立了累计SARS疫情预测预报中的非线性回归点模型。并具体对北京SARS疫情进行了跟踪预测预报，包括整体和分时间段的预测预报，获得了北京SARS疫情随时间的预测预报结果，说明了北京4月底的一系列控制措施对北京SARS疫情所带来的影响，为进一步的后续研究打下了良好基础。     

Optimal location of sensors for reconstruction of seismic responses through spline function interpolation

In this paper, a criterion is proposed for the choice of the optimal location of a limited number of recording sensors for reconstruction of seismic responses of multistorey frames. Reconstruction of unknown responses is performed by modelling through a spline shape function the evolution of the relative acceleration along the height of the building. The coefficients of the spline function are determined by interpolating available responses in terms of absolute accelerations taking into account boundary conditions. The optimal location for a given number of recording sensors is defined as the one corresponding to the minimum value of the global error evaluated on the whole set of reconstructed responses. The criterion has been verified by using simulated responses of numerical models of multistorey frames and responses recorded on real buildings during the Northridge earthquake. A physical characterization of the location of available sensors leading to the minimum global error between calculated and real responses is proposed in terms of effective modal participation factors relevant to the principal modes of the structure. This characterization allows for frames of known modal characteristics the definition of a criterion for the choice of the location of a limited number of sensors for monitoring or vibration control purposes. Copyright © 2003 John Wiley & Sons, Ltd.     

A New Method for Clay Mineral Analysis and Its Application in Geology

X-ray diffraction (XRD) peaks in a low-angle diffraction section of clay minerals, especially those of authigenic origin, have broadening and tailing features in shape. Using the five basic parameters, peak position, peak height, width, shape coefficient and asymmetry, to describe an XRD peak is more accurate, comprehensive and integrated than using only 3 of them, position, height and width. Following the concept of the five basic parameters of an XRD peak, the program Decoform proposed in this study provides more information in mineralogical analyses by fitting actual XRD profiles. In combination with the HW-IR plot, Decoform can be systematically and accurately used in the comprehensive analyses of crystallinity, domain size, lattice strain and quantitative phase. It is also of value for the geological investigations of diagenesis, metamorphism, basin maturity, structural stress field and so on.     

Seismological study on the crustal structure of Tengchong volcanic-geothermal area

Introduction The Tengchong volcanic-geothermal area is located on the northeast edge of the collision zone between Indian and Eurasian plates, and belongs to Eurasian volcanic zone (the MediterraneanHimalayanSoutheast Asia volcanic zone). In Tengchong area, the Quaternary volcanic, geothermal and seismic activities are all intensive. These phenomena have been drawing the attention of many geoscientists in the world. Their studies are concerned with geology, geophysics, geochemistry, and cr…     

GPS技术在柴阿润水电站工程中的应用

介绍了GPS技术在柬埔寨王国柴阿润水电站工程中的应用,设计了首级GPS D级控制网,实现了GPS技术在国外水电工程中的高效运用,解决了柬方的工程实践问题.