An integrated regionalization of earthquake, flood, and drought hazards in China

Earthquake, flood, and drought data from different sources are combined in a single data set using the same data structure, projection, and scale. The intensity and frequency of each hazard is classified into severe, heavy, modest, and light, producing a classification with 64 combined states for the three kinds of hazard. These classes are then ranked according to severity. The three hazard coverages arc overlaid and the polygons that are produced are coded by the classification system. A map is produced that shows the distribution of these 64 classes in regions and their areas measured from the spatial topological data file in the GIS. Spatial analysis reveals the spatial association among the three hazards and between the three hazards and human factors. There is a brief discussion of the implications of the regionalized map for hazard monitoring.     

重力场中的完整坐标与非完整坐标

阐明重力场中完整坐标系、非完整坐标系及其之间的转换关系以及完整坐标系的存在对大地测量的意义．指出水准测量中的理论闭合差是由于它所参照的局部笛卡尔坐标系是一个非完整坐标系导致的，并给出了计算理论闭合差的严密公式．     

2003年5月4日新疆伽师-岳普湖5.8级地震烈度分布及建筑物结构破坏特点

新疆伽师-岳普湖5．8级地震宏观震中位于岳普湖县的铁热木乡和兵团农三师42团的北面，震中烈度为Ⅶ度。本次地震影响范围位于巴楚-伽师6．8级地震Ⅵ-Ⅶ度影响区域内，累计破坏效应造成了较为严重的房屋破坏。通过对大量震害资料和强震记录的分析，根据建筑物的破坏情况和场地峰值加速度衰减特征，在尽可能排除累计破坏效应的基础上确定了地震烈度分布，分析了不同烈度区中的建筑物结构破坏特点及其与地震动影响场的关系。     

Seismic data compression based on integer wavelet transform

Introduction With the development of the seismological observation technique and deep-going of seismicdata application fields, especially the digitization of data in earthquake station networks, theimprovement of the precision, the data quantity increases as geometric order, which bringdifficulty to saving and transfering these data. To keep all information, seismic data, like medicalimages, should be compressed without error in many applications. In generally, traditionalcompression meth…     

静力弹塑性分析(Pushover Analysis)的基本原理和计算实例

阐述了美国两本手册FEMA273／274和ATC-40中关于静力弹塑性分析的基本原理和方法，给出了利用ETABS程序进行适合我国地震烈度分析的计算步骤，并用一框剪结构示例予以说明，表明Pushover方法是目前对结构进行在罕遇地震作用下弹塑性分析的有效方法。     

带"人字"支撑的新型复合结构体系动力特征研究

探讨了一种新型复合结构——带“人字”支撑的梁柱体系的动力特征问题。在满足静力荷载作用下承载力要求的基础上，根据结构动力学原理，推导了该结构体系的动力特征方程，分析了复合结构体系的支撑截面和型式的变化对动力特征的影响，计算显示，增加支撑对提高结构的频率即抗侧刚度有明显作用，且随支撑截面尺寸增大，固有频率单调增加。支撑倾角在一定范围内变化时，对频率影响较大，而超过该范围时，其影响明显减小，由此说明“人字”支撑为较合理的支撑型式。结果表明，所研究的具有“人字”支撑的复合结构体系具有较高的抗侧能力。     

利用GPS资料浅析华北地区块体运动及与地震活动的关系

为了研究华北地区近年地壳水平运动的状态与演化．利用10a来华北地区网络工程、山西断裂带GPS观测成果．结合该区地质构造背景．分析了华北地区各块体运动的方向、速率变化及其与区内所发生地震的关系．初步得出以下结论：在区域应力场相对稳定时，表现为区域内GPS观测点整体趋势性运动不明显；而在区域应力场相对变化时．表现为影响区域内GPS观测点出现明显的整体趋势性运动。     

GEOLOGICAL MARKS OF A POSSIBLE EXTRATERRESTRIAL IMPACT EVENT ON THE BOUNDARY BETWEEN SINIAN/CAMBRIAN IN TIANMENSHAN IN WESTERN HUNAN

Geologic marks related to extraterrestrial impact events, such as impact split gravels, impact brecciate layers, impact dikes, microirghizites, microtektites, especially meteoritic residues, were discovered on the boundary between Sinian/Cambrian at Tianmenshan of Western Hunan, which may possibly demonstrate that an extraterrestrial impact event has ever occurred there on the S/C boundary.     

玉米淀粉废水回收及处理研究

采用调节等电位点—超过滤组合技术对玉米淀粉废水的资源回收和处理进行研究,确定了最佳工艺参数。结果表明通过调节等电位点,可回收粗蛋白用作家禽饲料,同时废水中的CODcr、TSS和BOD5去除率分别可达48.8%、49.6%和27.2%以上,减轻了后续超过滤处理压力;通过超过滤进一步处理,出水COD、TSS和BOD去除率分别达91.3%、92.5%和95.1%。     

Typical basin-fill sequences and basin migration in Yanshan, North China--Response to Mesozoic tectonic transition

Basin-fill sequences of Mesozoic typical basins in the Yanshan area, North China may be divided into four phases, reflecting lithosphere tectonic evolution from flexure (T3), flexure with weak rifting (J1+2), tectonic transition (J3), and rifting (K). Except the first phase, the other three phases all start with lava and volcaniclastic rocks, and end with thick coarse clastic rocks and/or conglomerates, showing cyclic basin development rather than simple cyclic rift mechanism and disciplinary basin-stress change from extension to compression in each phase. Prototype basin analysis, based on basin-fill sequences, paleocurrent distribution and depositional systems, shows that single basin-strike and structural-line direction controlling basin development had evidently changed from east-west to northeast in Late Jurassic in the Yanshan area, although basin group still occurred in east-west zonal distribution. Till Early Cretaceous, main structural-line strike controlling basins just turned to northeast by north in the studied area.