改进型反褶积分层解释法——一种应用PC～1500计算机处理γ测井资料的新方法     

狄觉斋 《铀矿地质》1987,(2)

本文吸取了现行Υ测井资料解释方法的合理部分,提出了改进型反褶积分层解释法。叙述了方法的原理及设置判别因子的原则。作者以PC-1500微机为例给出了改进后的反褶积分层解释法程序流程图。通过对模型钻孔和实际钻孔测井资料的解释,证实了方法的合理性和可行性,克服了目前平均强度法中存在的人为影响,扩大了一般分层解释法的应用范围,该法可在现场及时取得结果,提高了解释速度和质量。  相似文献   

箱法在草地温室气体通量野外实验观测中的应用研究   总被引：31，自引：0，他引：31  

杜睿  王庚辰  吕达仁  孔琴心  刘广仁  万小伟  张斌  王艳芬  季保明 《大气科学》2001,25(1):61-70

利用静态箱法采样,配以气相色谱仪法分析对草地N2O、CH4和CO2温室气体通量进行了较系统的现场测量,同时对箱体内外温度进行同步观测。在对野外原位观测实验数据进行定量分析的基础上,论证了静态箱法对草原土壤-植被系统的N2O、CH4和CO2通量测量的适用性和科学性,讨论了实验结果的可靠性。  相似文献   

关于"和平花园"静压预应力管桩施工的技术、质量探讨     

杨宇星 《地质灾害与环境保护》2001,12(4):41-43

白恶统红层强烈风化复杂工程地质条件下,基础处理采用静压预应力管桩,可能出现管桩长度难以控制“超长桩”现象,广州和平花园施工实践表明,局部管桩长度难以控制,主要与持力层度剧烈变化及有上硬下软或硬夹层的工程地质条件有关。“超长桩”现象为一般管桩通过硬夹层折射;断桩在某软弱部位堆积造成。  相似文献   

Soil erosion and management on the Loess Plateau   总被引：6，自引：3，他引：3  

CAI Qiang-guo 《地理学报(英文版)》2001,11(1):53-70

1 Introduction The Loess Plateau situated in northern China covers the drainage basins in the middle reaches of the Yellow River. It starts from the western piedmont of Taihang Mountains in the east, reaches the eastern slope of the Wushao and Riyue mountains, connects the northern part of the Qinling Mountains in the south and borders the Great Wall in the north, covering an area of about 380,000 km2 (Figure 1). The region is overlain extensively by Quaternary loess in great thickness, …  相似文献   

不同地球化学景观区的化探方法及实例   总被引：5，自引：0，他引：5  

禹斌  李惠  张国义  张连发 《地质找矿论丛》2005,20(Z1):182-186

总结了最近20多年来化探在找矿过程中起到的重要作用,重点介绍了不同地球化学景观条件下最佳化探找矿方法及实例,为以后的找矿工作提供切实可行的方法,从而达到快速、经济、效果显著的目的.  相似文献   

森林沼泽景观区区域化探新、旧方法技术应用效果对比     

王会锋  彭立华  王晓云  安兴  陈恩科 《陕西地质》2007,25(2):44-53

自森林沼泽景观区1∶20万区域化探工作开展以来,各个单位、不同阶段工作方法技术各有不同,工作效果不明显。中国地质科学院地球物理地球化学勘查研究所近年来通过研究制定了新的工作方法技术,通过应用取得了较好的效果,为此本文仅以内蒙古一二五公里幅1∶20万区域化探新、旧方法技术的应用效果对比进行初步探讨。  相似文献   

桂西岩溶堆积型铝土矿地质异常分析及基于GIS的找矿有利地段圈定     

何海洲  张起钻 《矿产与地质》2007,21(4):436-439

桂西岩溶堆积型铝土矿床受地层岩性、构造、岩溶地貌、气候与水文等因素控制。通过对岩溶堆积型铝土矿床地质异常的分析和识别,利用G IS技术圈定铝土矿找矿的有利地段,并预测其资源潜力。  相似文献   

Application of horizontal-to-vertical (H/V) Fourier spectral ratio for analysis of site effect on rock (NEHRP-class B) sites in Taiwan   总被引：1，自引：0，他引：1  

Vladimir Yu. Sokolov  Chin-Hsiung Loh  Wen-Yu Jean   《Soil Dynamics and Earthquake Engineering》2007,27(4):314-323

The frequency-dependent amplification for rock (NEHRP-class B) sites was studied using earthquake ground-motion database collected in Taiwan during implementation of the Taiwan Strong Motion Instrumentation Program. The database used includes several hundred records from earthquakes of M_L 4.0–7.3 occurred between 1993 and 2004. The characteristics of amplification were evaluated using the well-known technique of horizontal-to-vertical Fourier spectral ratio (H/V) of the S-wave phase [Lermo J, Chavez-Garcia FJ. Site effect evaluation using spectral ratios with only one station. Bull Seism Soc Am 1993;83:1574–94]. The study allows us to analyze peculiarities of rock sites amplification in Northern and Eastern Taiwan. It was suggested to divide the NEHRP-class B site amplification into four types based on frequency of maximum amplification and the shape of amplification function. The applicability of the technique was also checked for a few stiff and soft soil sites (NEHRP-classes D and E).  相似文献   

Application of <Superscript>137</Superscript>Cs fingerprinting technique to interpreting sediment production records from reservoir deposits in a small catchment of the Hilly Loess Plateau,China   总被引：1，自引：0，他引：1  

Zhang XinBao  Wen ZhongMing  Feng MingYi  Yang QinKe  Zheng JinJun 《中国科学D辑(英文版)》2007,50(2):254-260

According to variations of 137Cs and clay contents, 44 flood couplets were identified in a profile of reservoir deposit with a vertical length of 28.12 m in the Yuntaishan Gully. Couplet 27 at the middle of the profile had the highest average 137Cs content of 12.65 Bq kg-1, which indicated the 1963s' deposits, then 137Cs content decreased both downward and upward in the profile. The second top and bottom couplets had average 137Cs contents of 2.15 Bq kg-1 and 0.92 Bq kg-1, respectively. By integrated analysis of reservoir construction and management history, variations of 137Cs contents over the profile, sediment yields of flood couplets and rainfall data during the period of 1958-1970, individual storms related to the flood couplets were identified. 44 floods with a total sediment yield of 2.36×104 m3 occurred and flood events in a year varied between 1 and 10 times during the period of 1960-1970. 7-10 flood events occurred during the wet period of 1961-1964 with very wet autumn, while only 1-2 events during the dry period of 1965-1969. Average annual specific sediment yield was 1.29×104 t km-2 a-1 for the Yuntaishan Gully during the period of 1960-1970, which was slightly higher than 1.11 ×104 t km-2 a-1 for the Upper Yanhe River Basin above the Ganguyi Hydrological Station and slightly lower than 1.40 ×104 t km-2 a-1 for the nearby Zhifang Gully during the same period. Annual specific sediment yields for the Yuntaishan Gully were correlated to the wet season's rainfalls well.  相似文献   

基于Windows98的天气图自动填绘软件     

赵恒轩  赵远东  张勇  沈桐立  徐文金 《南京气象学院学报》2002,25(3):429-432

基于Windows98平台用Fortran语言开发而成的最新版本的天气图自动填、绘图软件，一改过去DOS环境下的命令行操作方式，通过引入窗口、图标和菜单技术，不仅具有图文并茂的友好操作界面、灵活多样的人机接口方式，而且具有处理资料速度快，填绘图质量好，程度运行稳定可靠等优点。实践证明，它可以满足气象业务台站的使用要求。  相似文献