Determination of active units with different kinematic property and their activity pattern in North China based on the data from GPS remeasurements

IntroductionWith the most feasible and powerful technical support provided by the high-precision GPS measurement for the study on horizontal crustal deformation, the obtainment of various-scale horizontal movement data and its study over the whole world is now in the ascendant, and its applicable fields is now expanding successively. In China, besides the GPS monitoring networks for different applications arranged by many agencies and departments, the key scientific project Crustal Movement…     

General characteristics of the recent horizontal crustal movement in Chinese mainland

1 Introduction of GPS observation dataThe Crustal Movement Observation Network of China (CMONOC) is a major scientific project in China organized by China Seismological Bureau and paticipated by the Bureau of Surveying and Mapping of the General Staff, the Chinese Academy of Sciences and the National Bureau of Surveying and Mapping. Based on the observation data of 25 fiducial stations and 56 basic stations in CMONOC (Figure 1 and Table 1), collected from August 26 to September…     

我国国家重力网的系统转换

本文分析了我国１９５７年国家重力网的精度和问题，探讨了国家重力网的系统转换模式，利用现有的新旧重力网的重合点实际数据进行了回归分析、方差分析和系统误差检验，结果表明在“５７网”与“８５网”之间，除了—１３．５８ｍｇａｌ的平均基准差之外，并不存在其它明显的系统误差，特别是看不出有尺度系统差的影响，也不存在差值随纬度变化的任何规律。因此认为将“５７网”系统转换成“８５网”系统时，可以不必加“尺度系统差改正”，更不用考虑“非线性系统差改正”，建议一律只加一项“基准系统差改正”，其数值应该采用—１３．５８ｍｇａｌ。     

中国沿海地区国民收入预测的新组合模型

着重讨论一种基于灰色ＧＭ（１，１）模型及国民收入决定函数模型而建立的新组合模型。该模型建模方法简单，组合性强，并且在各模型的拟合精度提高。该模型汲取了灰色ＧＭ（１，１）模型模拟国民收入变化趋势的优点和国民收入决定函数模型模拟国民收入波动的优点，使组合模型不但在趋势上符合国民收入的发展，而且也给出了在波动方面的比较一致的模拟。     

从史料看凌源旱涝灾害的变迁

1 引言 凌源市位于辽宁省西部,境内多低山丘陵,自然灾害频繁,尤以旱涝灾害最甚,是农业生产的主要障碍。探索旱涝灾害发生原因,寻求其发展变化规律,对农业生产有着重要的意义。本文根据《凌源市自然灾害志》和市气象局雨量资料对此作一初步分析。     

内蒙古宁城县热水金矿构造成矿作用及地球化学特征探讨

本文主要介绍了热水金矿的矿化分布与构造控制作用,同时对成矿构造地球化学特征进行了探讨。