海泡石活性土对食用菜油的脱色作用

海泡石粘以活化后,对食用菜油精制脱色效果良好,其活化工艺条件为：活化酸量８％,烘干温度１５０℃,活化温度１００℃,活化时间〉５ｈ液固比３：１。     

深层搅拌法在湘北地区的应用前景

本文扼要介绍了深层搅拌法的工艺技术及适用范围,对湘北地区的工程环境条件进行了分析讨论,认为在湘北地区推广这一施工技术不仅具备工程地质条件,而且有关十分广阔的应用前景。     

进行矿山开采经济效益分析充分利用矿产资源

针对当前有些矿山企业在经济不景气,导致采富弃贫,采易避难等不良现象,本文提出加强对采矿方法,选冶工艺流程,以及尾矿利用的综合分析研究,通过对矿产资源的充分利用来提高其经济效益,促进矿业经济的可持续发展。     

高喷灌浆技术在防渗加固长善垸浏阳河防洪大堤堤基中的应用

高喷灌浆在长善垸浏阳河防洪大堤第四系松散地基的防渗、加固中效果显著,与其它防渗措施比较,其施工速度快,成本低,在深度覆盖层堤基防渗中显示出无可比拟的优越性。     

岳阳铁山灌区打山坡等引水隧洞工程地质问题及对策

岳阳铁山灌区的打山坡等３条引水隧洞,工程地质条件极为复杂,４１４队采用“新奥法”掘进,成功地解决了施工过程中遇到的严重片邦、冒顶和塌方等技术难题。     

Comprehensive Approaches to Earthquake Prediction

There may be various anomalies from fields of multi-discipline before large earthquakes, including seismological anomalies and the anomalous changes in crustal deformation, underground fluids, geochemistry, geomagnetic fields, ground resistivity, etc. Precursors of a single discipline only reflect the process of earthquake preparation from one aspect. Only when various precursors from multi-disciplined fields are put into a unified process of earthquake preparation can the process be understood and identified comprehensively. The comprehensive methods used in earthquake prediction are outlined in this paper. The relationship that the forthcoming main shock bears with the precursory features such as the time-space distribution, the order of the precursors, etc. is analyzed. Research shows that a few of the main shocks can be predicted with the comprehensive methods to some extent.     

Research on Earthquake Precursor Attractor and Its Predictability

Based on the body strain observation data at Liyang and Xuzhou stations, the Correlation Dimension D2 and the second-order Renyi entropy K2 of the attractor are calculated and studied. In addition, a new method of evaluating the longest predictable time of precursor attractor is advanced under the condition of a certain anomalous criterion rule. The conclusion indicates that the body strain precursor attractor is one of the chaotic attractors and it has some determinate change rules such as the dimension declines before an earthquake and the number of the independent factors on which the variation of the system depends is within the range of 5 - 12. The conclusion also indicates that the longest evaluated predictable time of the body strain attractor is 213 days at the Liyang station and 342 days at the Xuzhou station. It is clear that this research can be of great reference value for recognizing the nonlinear behavior of precursor attractors and for evaluating the predictability of different precursor     

我国水资源开发利用业绩与前景

新中国成立以来,我国水利事业得到迅速发展,有效地促进了社会的进步与经济的繁荣。我国是世界上人均水资源贫乏的国家之一,如何实现水资源与社会,经济、环境的协调发展,实现水资源的可持续开发利用,仍将是我国可持续发展的关键问题之一。回顾了新中国成立以来水资源开发利用发展的阶段与过程,简要介绍了在水资源开发利用与保护方面的主要成就,较为系统地回顾和总结了我国水资源管理方面的主要工作,并对２１世纪我国水资源可     

1998年全国区域地质调查工作总结

总结了１９９８年全国各省、自治区、直辖市在１∶５万、１∶２５万区域地质调查和１∶５万区调片区总结中取得的成果,在地层古生物、岩石、构造、矿产、农业地质、生态地质、环境地质、灾害地质、旅游地质等方面的调查中都取得了许多新成果     

上地幔各向异性分析中地壳的影响

应用伪谱法研究了地壳各向异性对上地幔各向异性分析的影响. 用几种不同情况下的两层各向异性模型,模拟了全波场,着重分析了不同深度观测点上的剪切波分裂特征. 结果表明,当地壳为各向同性或其各向异性主轴与上地幔重合或相互垂直时,在地壳观测到的快、慢剪切波的偏振方向保持了上地幔中的偏振方向;重合时,快、慢波走时延迟增大;垂直时,走时延迟减小. 当地壳的各向异性主轴与上地幔成一般夹角时,其粒子运动轨迹变得十分复杂,不能直观地识别上地幔各向异性中的快波方向,对走时延迟也有一定的影响. 将常用的两种分析方法应用于对模拟结果的反演,发现当地壳各向异性与上地幔各向异性方向为一般夹角时,反演结果会出现较大的误差或误判. 进而提出解决这一问题的方法,一是综合多种方法的结果;二是由拟合残差或相关系数等值线作进一步的确定.