1962—1986年JYD1968.0地极坐标的均匀化及其与BIH的比较

本文研究了１９６２－１９８６年ＪＹＤ１９６８．０地极坐标均匀中星表系统差，章动系列的变动和光行星常数变动的影响，并将经过改正后的ＪＹＤ１９６８．０地极坐标系统和ＢＩＨ系统作了比较。     

地壳岩石与矿物的流变性研究综述

地壳岩石与矿物的流变性主要受温度的控制，其次是受其成分的控制。在深部地壳高温环境下，岩石和矿物的流变性较强，应变相对均匀分布。在浅部地壳中，它们的粘滞性及各自间的粘滞性比显著增强，而流变性减弱，应变逐渐集中于适合流变和变形的岩石与矿物。流变性的这种变化导致了露头各种构造形迹的变化，如皱、布丁和剪切带等，以及各种显微构造特征的变化（如：变形矿物、压力影和膝折等）。岩石与矿物的这种物性概念在地质学中的运用，实质是将构造变形样式的形成机理分析趋于定量化和综合研究。     

IP效应对电磁感应响应的影响研究

严密的推理和大量精确的计算结果,揭示了IP效应对EM响应的影响.在野外常见的极化条件下,在电磁法工作频率范围(1～1000Hz)内,绝对影响过极大值.相对影响可达10%以上.充电率m越大.极化时间常数T对球体本身的感应时间常数r之比越小、频率响应系数c越小.影响越大,山响的频率越高.     

补偿电流对核旋分量仪的影响及补偿稳流装置

着重讨论补偿电流对核旋分量磁力仪在观测地磁场垂直分量中的影响,介绍了补偿稳流装置和在大连地磁台应用的效果。     

Reflection and transmission ofSH waves in an initially stressed medium consisting of a sandy layer lying over a fluid-saturated porous solid

Biot's theory is employed to study the reflection and transmission ofSH waves in a sandy layer lying over a fluid-saturated porous solid half-space. The entire medium is considered under constant initial stress. Effects of sandiness, initial stress, anelasticity and viscosity of the interstitial fluid on the partitioning of energy are studied. In the presence of initial stress the incident wave starts attenuating when incider beyond a certain angle (depending upon the amount of initial stress), even if the medium is perfectly clastic. Anelasticity of the solid layer results in the dissipation of energy during transmission. The direction of attenuation vector of incident wave affects the dissipation energy to a large extent. Effect on partitioning of energy reverse at incidence after the critical angle. A complete account of energy returmed back to the underlying half-space and that which is dissipated in the overlying layer has been discussed analytically as well as numerically.     

Flow Characteristics of Large-Scale Liquefaction-Slip of the Loess Strata in Shibei Tableland, Guyuan City, Induced by the 1920 Haiyuan M8 1/2 Earthquake

Based on the dynamic triaxial liquefaction test of the loess samples which are taken from Shibei tableland, Guyuan City, Ningxia, China, the characteristics of dynamic strain, dynamic stress and pore water pressure are studied under cyclic loading. Triaxial shear test is conducted immediately after the sample reaches liquefaction point. During the test, the property of the liquefied soil is analyzed through fluid mechanics method, whereby the fluidity of the liquefied soil is represented by apparent viscosity.The results show that the fluidity of liquefied loess changes from "shear thickening" to "shear thinning" as the shear force continues, and the fluidity of liquefied loess is closely related to its structure. In addition, in the process of forming a new stable state, the apparent viscosity and deviant stress change with axial strain in a similar approach. When the sample reaches its stable state, it meanwhile shows a relatively stable apparent viscosity. According to the fluid mechanics and the law of conservation of energy, the slip distance of the liquefied soil is estimated, and the results are in good agreement with the field investigation results.     

岩石矿物组份质量转移的模糊聚类定量计算

本文根据岩石矿物组份质量分数值的定和特性 ,提出定量计算组份质量转移的新方法。该方法运用模糊动态聚类分析技术 ,通过计算复原定和差并判定差值类型 ,辅以相应的判别参数 ,逐步从中筛选出真恒量组份 ,再利用真恒量组份定值系数 ,计算出变组岩石矿物各组份的真实质量分数值和转移量值。笔者将该方法称为真恒量组份定值法 (TCF法 )。     

氯化钠盐土壤介电虚部特性的初步研究

含水含盐土壤的介电虚部模型是土壤含水量含盐量的函数。通过一系列关系研究：介电常数虚部ε＂，土壤导电率σa，土壤溶液导电率σw，土壤溶液离子浓度SMv，含盐量S，最终得到介电常数虚部ε＂和土壤含水量Mv。含盐量S的关系，即土壤介电模型。通过微波网络仪，对150组具有不同含水含盐量的土壤，在频率范围0．2-20GHz（频率取样间隔为0．05GHz）进行介电常数测量。在不同频率下，利用这些实测数据通过最佳拟合的方法确定土壤介电模型中的待定参数，从而得到不同频率时土壤介电虚部经验模型。另外，利用吉兰泰地区41个含盐土壤样品进行模型验证，结果表明，模型计算值与测量值高度相关。最后得出：（1）含盐量对介电常数虚部的影响随频率增大而降低；（2）土壤类型和介电常数虚部几乎没有相关性。     

A Reanalysis and Reinterpretation of Geodetic and Geological Evidence of Glacial-Isostatic Adjustment in the Churchill Region, Hudson Bay

We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of, or against, continuing land uplift around Hudson Bay, Canada. We also reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained from the tide-gauge record on the length and mid-epoch of the observation interval considered is investigated by means of a newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of GFZ. To include the post-glacial land uplift, sea-level indicators from the Churchill region representing the relative sea-level history during the past 8000 years are also used. Finally, the values of the four observables are jointly inverted in terms of mantle viscosity. The optimum values are ~3.2 × 10²⁰ Pa s and ~1.6 × 10²² Pa s for the upper- and lower-mantle viscosities, respectively.