利用GIS绘制综合等震线

利用ＧＩＳ的拓扑叠加原理绘制了东南沿海地区的综合等震线,并将这种方法加以推广,编制了利用ＧＩＳ绘制综合等震线的通用程序,为工程地震研究中的烈度区划工作提供了方便途径     

山东区域地电场观测质量分析

对7个台的观测数据质量进行评价和分析,结果表明:郯城、菏泽、大山和陵阳地震台数据质量较好,精度较高,可为地震研究提供可靠的数据资料.     

Preliminary investigation of seismic damage to two steel space structures during the 2013 Lushan earthquake

Severe damage to steel space structures is rarely reported when compared to other structural systems damaged during past major earthquakes around the world.Two gymnasiums of steel space structures in downtown Lushan County that were damaged during the 2013 M7.0 Lushan earthquake in China were investigated and the observations are summarized in this paper.Typical damage to these two steel space structures ranges from moderate to severe.Moderate damage includes global buckling and dislocation of bolted connections of truss members,and inelastic elongation of anchor bolts and sliding of pedestal plates of supports.Severe damage includes member fracture caused by local buckling,and fracture failure of anchor bolts and welds.The distribution of structural damage to these two structures is described in detail and future research opportunities are suggested.     

风光发电系统在无人值守地震台站的设计

风光互补发电技术在边防、通信、公路等已得到广泛应用,能否将这一绿色、清洁、可再生能源应用于地震无人值守台站,山东省在龙口地震台已做先期试点,通过一年试运行,风光互补发电系统能够满足地震无人值守台站的工作要求。     

基于时空双变网格的起伏地表变坐标系正演模拟方法（英文）

坐标变换法通过将物理空间的曲网格映射为计算空间的矩形网格,将起伏地表转化为水平地表,同时将物理空间的波动方程转化为计算空间的波动方程,在计算空间完成数值模拟,坐标变换的方法对处理起伏自由边界具有较好的适应性和应用效果。本文在传统坐标变换方法的基础上,根据计算区域速度差异采用不同的网格大小和采样时间步长,提出了一种基于时空双变网格的起伏地表坐标变换正演模拟方法。在编程实现算法的基础上,通过典型模型波场模拟试算结果分析可知:(1)变网格方法与常规方法波场模拟误差在0.5%左右;(2)变网格方法计算效率视不同的变网格区域面积及变网格大小可提高几倍量级,在本文模型和计算参数下提高约5倍。(3)在满足模拟精度及频散条件要求下,变网格方法较全局细网格算法能显著节约计算内存。为此,针对起伏地表数值模拟,本文方法具有较高的模拟计算精度和一定的适应性。     

VP型宽频带倾斜仪映震能力分析

根据所掌握的仪器映震能力、震前(后)大震特殊捕捉现象,以及对相同地震不同仪器映震的对比,可以看出,VP型宽频带垂直摆倾斜仪具备前兆仪器捕捉(反映)地震孕育及地震发生的相关作用,能够正确、客观的作用于地震前兆数据产出,对地震预测研究具有深远影响.     

基于震情会商实时异常分类记录的综合异常指数研究

为进行异常特征或异常判据的定量分析,在多种预测手段(方法)的异常隶属度转换的基础上生成单项异常指数时间序列,再通过将多种预测手段(方法)单项异常指数时间序列逐时段累加取均值,得到综合异常指数时间序列,实现前兆信息的定量化。研究中根据新疆台站分布、历史地震及地震构造背景等,选定7个研究区进行应用研究。各研究区综合异常指数时间进程曲线分析表明,台站相对密集的北天山3个研究区综合异常指数在中等地震前出现较明显的短期异常,而台站相对稀疏的南天山地区几个研究区除柯坪块体的阿克苏-乌什-阿合奇地区的综合异常指数在巴楚-伽师6．8级地震前出现明显的短期异常外,其它地区综合异常指数时间进程曲线稳定性及异常对应效果较差。     

Wind tunnel simulation experiment and investigation on the electrification of sandstorms

~~Wind tunnel simulation experiment and investigation on the electrification of sandstorms~~     

Why does the Antarctic Peninsula Warm in climate simulations?

The Antarctic Peninsula has warmed significantly since the 1950s. This pronounced and isolated warming trend is collectively captured by 29 twentieth-century climate hindcasts participating in the version 3 Coupled Model Intercomparison Project. To understand the factors driving warming trends in the hindcasts, we examine trends in Peninsula region’s atmospheric heat budget in every simulation. We find that atmospheric latent heat release increases in nearly all hindcasts. These increases are generally anthropogenic in origin, and account for about 60% of the ensemble-mean warming trend in the Peninsula. They are driven primarily by well-understood features of the anthropogenic intensification of global hydrological cycle. As sea surface temperature increases, moisture contained in atmospheric flows increases. When such flows are forced to ascend the Peninsula’s topography, enhanced local latent heat release results. The mechanism driving the warming of the Antarctic Peninsula is therefore clear in the models. Evidence for a similar mechanism operating in the real world is seen in the increasing snow accumulation rates inferred from ice cores drilled in the Peninsula. However, the relative importance of this mechanism and other processes previously identified as potentially causing the observed warming, such as the recent sea ice retreat in the Bellingshausen Sea, is difficult to assess. Thus the relevance of the simulated warming mechanism to the observed warming is unclear, in spite of its robustness in the models.