西部地震资料主要处理技术研究

西部地区地表情况多样,资料品质较差,多属低信噪比资料。这对类资料,静校正叠前去噪及速度分析等技术是非常重要的基础工作。针对西部地区不同的资料采用相应的静校正方式,在叠前去噪方面,就FK域倾角滤波方法的应用上进行了改进,克服了该方法一些“蚯蚓化”、“假构造”等弊端,总结出一套切实可行的尤其是用于西部资料的去噪方法。并针对多次波的特点,采用时间域,频率域及τp域等多种方式进行多次压制,在西部资料的处理中取得了较好的效果。     

用年雨量和11月份气温作融安县倒春寒预报

用年雨量和１１月份气温作融安县倒春寒预报覃克星（融安县气象局５４５４００）１倒春寒预报指标融安属桂北山区,倒春寒是以３月２０日以后出现日平均气温≤１２．０℃且连续３ｄ或以上称为有倒春寒,反之为无倒春寒。经过分析,得出：融安降雨量偏少（即年雨量在１６０...     

强震概率增长时段判定法在粤东及邻区的应用

将强震概率增长时段判定法（ＴＩＰ－Ｍ８）应用于粤、闽、赣交界及近海地区,资料从１９８５至１９９５年底。绝大多数地震流函数异常显示,从１９９５年底起３年内该区将发生５．５级左右地震。１９９７年５月３１日发生的福建永安５．２级地震与此判断相符。     

螺旋CT的临床应用

探讨螺旋ＣＴ在临床应用价值,选择部分典型病例３０例,其中血客性病变或螺及血管的病变８例,骨病变２１例,胆道病变１例,扫描机为Ｐｈｉｌｉｐａ Ｔｏｍｏｓｃａｎ Ａｖｅｐ。血管成像为主的,选择２－５ｍｍ的准直器宽度和床速,１２ｍｍ间隔重建,其它病变选择５－７ｍｍ的准直器宽度和床速,２－３ｍｍ间隔重建,增强扫描使用６０％的碘造影剂８０－１２０ｍｌ,以脏静脑用高压注射器注入,速率３ｍｌ／ｓ,脑血管和腹腔建     

Pollen-based reconstruction of vegetation patterns of China in mid-Holocene

Biomization provides an important way to assign pollen taxa to biomes and to simulate palaeo-vegetation patterns, so that pollen data can be mapped to reconstruct biogeography and climate. The authors have tested the applicability of this procedure to assign modern pollen surface samples from China to biomes. The procedure successfully delineated the major vegetation types of China. When the same procedure was applied to 6 ka B. P. fossil pollen samples, the reconstructions showed that the forest zones were systematically shifted northwards ca. 300–500 km beyond their present northern limits in eastern China; the area of desert and steppe vegetation was reduced compared to the present in northwestern China; the area of tundra was reduced largely on the Tibetan Plateau. This research is a contribution to the project of BIOME 6000 in Pacific-Asian regions. Project supported by the Funding for Returned Students from the Overseas of the State Education Commission of China, the Postdoctoral Station, and State Pilot Laboratory of Coast & Island Development of Nanjing University, Financial support has also been provided by European Community (EV5V-CT95-0075) and by the Swedish Natural Science Research Council (G-AA/GU 09334-321).     

NUMERICAL STUDY ON THE EFFECTS OF SEA SURFACE TEMPERATURE ON TROPICAL CYCLONE INTENSITY-PART I:NUMERICAL EXPERIMENT OF THE TROPICAL CYCLONE INTENSITY RELATED TO SST *

In the context of a model of tropical cyclone intensity based on an improved meso-scale atmospheric model, numerical simulation is performed of the track and intensity variation of tropical cyclones(TC) arising from sea surface temperature(SST) variation over a specified sea region. Evidence suggests that the model is capable of modeling quite welt the track and intensity of TC:SST variation leads to an abrupt change in the cyclone intensity:the response of the cyclone to the abrupt SST change lasts 8-12 h.     

由孕震后期非线性层次演化探讨短临预报问题

鉴于震源区为最后失稳区,震前前兆信息量最少,最弱以最晚出现,而近源区的调整单元（弱介质区域蠕滑断层等）前兆信息量最多,最强以及最早出现,提出由异常区边界交汇法确定震源位置（以场求源）;又鉴于孕震过程存在阶段性和层次性,提出由阶段性和层次性表现的时间特征确定主震发生时间（简称层次法）由上述二个思路和方法,本文对１９９５年永登地震孕震全过程和短临预报了研究了,研究表明,在地点中期预报基础上进一步由层次     

腾冲火山地区微震观测(Ⅰ)

本文综述了腾冲火山地区微震观测台网的建立与所取得的具有研究价值的地震记录。内容包括观测系统性能、台站布局、地震记录。由观测资料表明腾冲火山地区存在微震活动。讨论了台网需要努力的目标。     

A preliminary research establishing the present-time intraplate blocks movement model on the Chinese mainland based on GPS data

The Chinese mainland is regarded as the best area for studying the continental crustal movement and dynamics. In the past, based on the ground surface observation, it was very difficult to study the movement of the intraplate blocks within a range of larger space and a time scale of several years quantitatively. In this paper, a method of calculating the Euler vectors of present-time motion among blocks by using Cardan angles has been given completely based on two periods of GPS repetition measurement data of the National Ascending Plan of China (NAPC) — the study and application of current crustal movement and geodynamics in 1994 and 1996. A present-time blocks movement model on the Chinese mainland (PBMC-1), which describes the motion of seven blocks—Tibet, Chuan-Dian, Gan-Qing, Xinjiang, South China, North China and Heilongjiang block, is established preliminarily. The velocity field of the relative motion among the intraplate blocks and boundary motion in the Chinese mainland are firstly given within several years time scale. It is shown by the results calculated with the model that the velocity-rate of each block is reduced gradually from the south to north and from the west to east, and the motion direction changes gradually from NNE to E, even SEE or SE. The collision of Indian plate plays a leading role in the movement of the intraplate blocks in the Chinese mainland, while the motion manner and velocity-rate of block boundary zone (fracture zone) depend on the motion of every block again. The present-time motion of a time scale of several years computed with the model is not only largely consistent with the average motion of a time scale of several million years derived from geology, but also very coincident with the results of geophysical and astronomic observation. It is shown preliminarily that the observed results of space geodesy techniques such as GPS etc. are capable of discovering the crustal movement at present. This study is supported by the National Natural Science Foundation of China (NNSFC), National Ascending Plan of China (NAPC) and Chinese Joint Seismological Science Foundation (CJSSF).     

煤层显微序列数学模拟及其在煤储层物性评价中初步应用

应用马尔柯夫过程的原理和方法,建立起描述煤层形成过程或显微序列的数学模式,进而通过对研究实例中煤层结构以及煤岩分层孔比表面积的模式拟合,可以模拟出各种显微煤岩类型在煤层中的分布部位以及煤层中煤层甲烷的有利储存部位,对厚煤层物性和储气性能的非均质性特征作出预测,为煤层气开采地质条件评价提供了一条新的思路。