地震孕育体源流变模型--位移与应变场

由于岩石介质在温度较低、压力不大、外力作用时间不长的情况下,主要显示为弹性性质;但在温度高、压力大、作用力时间长的情况下,则显示出流变性质.对于持续数十秒的快速错动的地震发生过程,用弹性理论处理发震过程是恰当的,但对于持续数百年乃至上千年的孕震过程,岩石的流变性是必须考虑的问题(张国民,1987;尹祥础,郑天愉,1982;梅世蓉等,1993).     

CHARACTERIZATION AND FORMATION MECHANISM OF THE CENTRAL UPLIFT OF THE QIANGTANG BASIN

The Qiangtang basin is located between Kekexili-Jingshajiang suture belt and Bangong-Lujiang suture belt, and is divided into the north part and south part by the central uplift that has no crop out of Mesozoic strata. When the Jinshajiang Ocean was closed, the subducting plate was subducted southward. In the central part of the Qiangtang basin, the cushioning effect of the asthenosphere resulted in the thermal doming of the mantle and subsequent large-scale anatexis. Mantle source materials and antectic materials were upwelled and extruded into the middle crust, leading to the thickening of the middle crust and the heating and weakening of the middle to upper crust, and resulting in the rapid deformation (detachment) and tectonic erosion, and in the isostatic uplifting and the formation of metamorphic core complex. The upwelling of anatectic materials would further enhance the buoyant repercussion, which would combine with the side stress due from extrusion in resulting in the formation of an extension     

土体各向异性的再认识

土体原生和次生各向异性有本质不同。从柔度矩阵的角度分析了弹性和弹塑性理论对各向异性的反映 ;复杂应力状态下砂土真三轴试验结果表明 ,次生各向异性对土体应力应变关系有很大影响 ,是土体特性的本质体现 ,在土工数值分析中应当充分考虑其影响。     

四川内江松柏寨旅游资源特征及开发浅论

详细介绍了内江松柏寨的七山、七堰、八景等自然景观；对以般若寺为代表的寺庙、寨门以及历代名人所留下的行踪和墨迹作了生动描写；提出以生态旅游为理念进行统一规划，并采取保护性开发的若干建议。     

3-D rheologic model of earthquake preparation (II): Strain field and its applications

Introduction Based on the elastic theory of the hard inclusion (Dobrovolskii, 1991), we developed an inclusion theory of rheologic medium, and applied the results of bulk-strain field of a rheologic inclusion model to explain the spatial-temporal evolution process of earthquake precursors (SONG, et al, 2000). In the former paper (SONG, et al, 2003), we derived the viscoelastic displacement field of the rheologic inclusion model on the basis of the analytic expression of displacement field o…     

An experimental study on seismic responses of multifunctional vibration‐absorption reinforced concrete megaframe structures

Two models are tested on a shake‐table. One of the models is a normal reinforced concrete megaframe structure and the other is a multifunctional vibration‐absorption reinforced concrete megaframe structure in which the laminated rubber bearings are placed between the major frame and the minor frames. Two earthquake motions (the El Centro wave and the Taft wave) are used during the test. This paper presents the dynamic characteristic, the seismic responses and the failure mechanism of these two models under varying peak acceleration levels for each of the earthquake motions. The test results demonstrate that the aseismic behavior of a multifunctional vibration‐absorption reinforced concrete megaframe structure is much better than that of a normal reinforced concrete megaframe structure. Copyright © 2003 John Wiley & Sons, Ltd.     

李坝金矿床金的赋存状态与选矿工艺学

李坝大型金矿床是产于西秦岭上古生代沉积岩系中类卡林型金矿床典型代表。通过显微镜及选矿实验查定了李坝金矿床金的赋存状态，矿床金矿物呈微细粒多种独立矿物出现，金的赋存形式多样，显示多期多阶段成矿特点，成为划分类卡林型金矿的重要参考。矿石工艺学的研究对工业选矿有指导意义。     

Sorption Characteristics of Rare Earth Element Eu^3＋ onto Silica-Water Interfaces Studied by Fluorescence Spectroscopy

The sorption of Eu species onto nano-size silica-water interfaces was investigated using fluorescence spectroscopy for Ph ranges of 1-8.5 and an initial Eu concentration (Ceu) of 2×10-4 M. The sorption rate of Eu was initially low, but significantly increased at Ph>4. The sorption density of Eu species on a silica surface was ～1.58×10-7 mol/m2 when the dissolved Eu species were completely sorbed onto silica-water interfaces at Ph=～5.8. The sorbed Eu species at Ph<6 is aquo Eu3 , which is sorbed onto silica-water interfaces as an outer-sphere complex at Ph<5, but may be sorbed as an inner-sphere bidentate complex at 5相似文献   

DLG数据采集中的自动接边实现

分析了实现自动接边中需要解决的基本问题，说明了DLG生产中不推荐使用曲线的理由，给出了接边程序的流程和关键算法。最后介绍了MAP系统中的自动接边功能。     

建筑物沉降规律的综合时序分析

建筑物的沉降监测数据序列具有趋势变化和随机变化的特点，本文针对两种变化项的特点分别建立相应的数学模型，再将其组合起来建立综合数学模型，从总体上把握沉降数据序列的变化规律。实例计算分析表明，此方法具有较高的拟合精度和预测能力，具有一定的应用参考价值。