华北地台太古宙主要变质岩的平均化学组成

在华北地台太古宙高级变质区和花岗岩，绿岩带内系统采集了变质杂岩体和变质火山岩样品２７７５个，组合成３３９件分析样，采用１５种分析方法对样品进行测试，同时由国际公认的国家一级地球化学标准物质监控分析质量，提出了华北地台长英质片麻岩、变粒岩、麻粒岩和斜长角闪岩２６种变质岩类１３个主成分和６４种微量元素的平均含量     

Analysis on rupture feature of a great complicated earthquake in Kamchatka

ＡｎａｌｙｓｉｓｏｎｒｕｐｔｕｒｅｆｅａｔｕｒｅｏｆａｇｒｅａｔｃｏｍｐｌｉｃａｔｅｄｅａｒｔｈｑｕａｋｅｉｎＫａｍｃｈａｔｋａＹＵＡＮＧＡＯ１）（高原）ＳＩＨＵＡＺＨＥＮＧ１）（郑斯华）ＨＵＩＬＡＮＺＨＯＵ２）（周蕙兰）ＺＨＥＮＬＩＵ２）（...     

中国满洲里—绥芬河断面域及邻区地球化学分区及其形成的构造过程

基于对断面域前寒武纪基底、古生代碎屑岩和花岗质岩石的化学组成分析，结合区域成矿和构造演化特征，建立了断面域前寒武纪和古生代两个不同时间域的地球化学分区。通过地球化学分区与构造演化的关系研究，探讨了地球化学区形成的构造过程。     

中国东部地壳元素丰度与岩石平均化学组成研究

迄今我们习用的地壳化学元素丰度和岩石平均化学组成的文献值大多是收集的汇编数据,不少微量元素特别是贵金属等难测元素的丰度所依据的样品的代表性和测试质量难以考证,其值存在着颇大的不确定度。本研究立足于实测资料,在中国东部系统采集了各类火成岩和变质杂岩体及各时代的标准地层剖面岩石样品28253个,组合成2718个分析样。采用中子活化等15种可靠分析方法测试,以国家一级标准物质作质量监控。求得的华北地台地壳、中国东部上地壳和出露地壳及各类岩石的78种化学元素丰度,显著改善了地壳和岩石的化学元素丰度,填补了多种岩石微量元素丰度的空白。     

Residential satisfaction and the propensity to move: an analysis of potential movers from marginal settlements in Costa Rica

The authors use 1974 survey data from three marginal communities in the city of Limon, Costa Rica, to examine the propensity of settlers in such communities to move voluntarily. In particular, the concept of residential satisifaction is examined and refined     

Study of radioactive status in the Zhujiang Estuary and adjacent sea area in South China Sea (SCS)

Through the investigation on radioactive activities of water, sediment and some marine organismsin the Zhujiang Estuary, adjacent sea area and the distributary mouths of the Zhujiang River, activities of total α. radioactivity, total β radioactivity, artificial radioactive 90Srand 157Cs, and factors inflencing the distribution and the content of U in seawater are studied.The mainly radioactive pollution substances and their sources in the sea area are studied by γ spectra obtained from sediment in the sea area. The results show that the main radioactivity substances are natural radioactivity U,Th series and 40K. which were produced by the modern industry and transported into the sea through the main current of the Zhujiang River.     

AccQ-Tag法测定毛蚶抗贫血口服液中的氨基酸含量

以 6 -氨基喹啉 - N-羟基琥珀酰亚胺基氨基甲酸酯 (AQC)为衍生剂 ,与毛蚶抗贫血口服液中的氨基酸柱前定量衍生 ,用 Waters HPL C仪 ,Acc Q- Tag TM专用 C18柱 (3.9mm× 15 cm) ,以140 mmol· L-1的醋酸钠溶液 (p H5 .0 2 )为溶剂 A,乙腈为溶剂 B,超纯水 (Milli- Q水 )为溶剂 C,进行梯度洗脱 ,检测波长为 2 4 8nm,35 min测试完毕。各种氨基酸测定的重现性 RSD%均 <3.0 %(n=5 )。该方法简便快速 ,结果准确可信。     

Tide Forecasting of Tides Around Taiwan by Artificial Neural Network Method and Wavelet Analysis

In multiresolution analysis(MRA)by wavelet function Daubechies(db),we decompose the signal to two parts,the low and high frequency content.The high-frequency content of the data is removed first and a new "de-noise" signal is reconstructed by using inverse wavelet transform.The wavelet spectrum and harmonic analysis were used to analyze the characteristics of tidal data before constructing the input and output structure of ANN model.That is,the concept of tidal constituent phase-lags was introduced and the new "de-noise" signal was used as the input data set of ANN and the forecasting accuracy of ANN model is significantly improved.     

Friction Characteristics at the Pipe-Soil Interface

-In order to analyze the stability of pipelines on the sea bed, the friction characteristics at the pipe-soil interface were examined by means of special direct shear tests. High density polythene was used as the surface of the pipe, which is a widely-utilized material for the outer cover of the pipe to prevent sea water corrosion. Sands of different gradings were tested. The reconstituted soft clay taken from the Bohai area was consolidated to different degrees of consolidation by the vacuum preloading technique, and tested.