计算机在无线通讯系统中的抗干扰措施     

曹凤娟  刘民 《东北地震研究》1996,12(3):42-47

针对计算机系统的主要干扰源，结合笔者在实际工作中的体会就计算机在无线通讯系统中的抗干扰问题进行了讨论，并给出了相应的各种抗干扰措施。  相似文献   

北京延庆盆地50万年以来的主要构造事件及年代学的初步研究   总被引：1，自引：0，他引：1  

尹功明  卢演俦 《华北地震科学》1996,14(4):19-30

延庆盆地是一个位于燕山山及脉南京的晚新生代形成的小型断陷盆地，通过对延庆盆地系统的野外调查，根据延庆分协的地貌，只物，断裂活动等特征，初步认为延就分协在过去约５０万年曾发生守三次对盆地地貌和沉积环境演化发生过重要升改变盆地演经过程的重大构造事件。  相似文献   

Variation of the Load/Unload Response Ratio Before the Main Shocks of the Reservoir-Induced Earthquakes     

Chen Xuezhong  Yin XiangchuInstitute of Geophysics  SSB  Beijing  ChinaCenter for Analysis  Predicuon  SSB  Beijing  China 《中国地震研究》1996,(2)

In this paper, the theory of the load/unload response ratio is applied to the prediction of the reservoir-induced earthquakes, and variation of the load/unload response ratio Y preceding the occurrence of main shocks of the reservoir-induced earthquakes in Xinfengjiang, Foziling, Danjiangkou, and Shenwo. The results show that the load/unload response ratio Y rises evidently prior to the main shocks.  相似文献   

Classification of Structure Vulnerability and Evaluation of Earthquake Damage From Future Earthquakes     

Yin ZhiqianInsurute of Enginsering Mechanics  SSB  Harbin  China 《中国地震研究》1996,(3)

In this paper,three problems are studied and their results are presented as follows:(1)classification of seismic vulnerability for existing buildings,(2)dynamic earthquake damage matrix analysis method of buildings,and(3)earthquake damage matrix of building in the year 2000.  相似文献   

Investigation on the Load/Unload Response Ratio With Coda Q-1 as Response     

Chen Xuezhong  Yin Xiangchu  Aki K  Ouyang H  Jin A.  Song Zhiping  and Wang YucangCenter tor Analysis  Prediction  SSB  Beijing  ChinaSouthern California Eanhquake Center  University of Southern California  Los Angeles  USAInstitute of Geophysics  SSB  Beijing  China 《中国地震研究》1996,(4)

The load/unload response ratio YQ with the geophysical parameter coda Q-1 of the crust as response is denned in this study.The variation in YQ-1 before and after the Northridge earthquake of January 17,1994(California)has been investigated by using the data of coda Q-1 with frequencies of 1.5,3.0,6.0,12.0,and 24.0 Hz in the Southern California from 1987 to 1994.It can be found that YQ-1 for coda waves with all frequencies,the frequency of 12.0 Hz excluded,ascended to a certain extent prior to the occurrence of the rnainshock and returned to normality after the main shock.  相似文献   

The Temporal Variation of LURR in Kanto and Other Regions in Japan and Its Application to Earthquake Prediction     

Yin Xiangchu  Chen Xuezhong  Song Ziping  and Wang YucangCenter for Analysis  Prediction  SSB  Beijing  China Institute of Geophysics  SSB  Beijing  China 《中国地震研究》1996,(4)

The temporal variation of LURR(y)for Kanto,Wakayama,and Hugo regions in Japan has been calculated and analysed.The LURR(y)values are significantly higher than 1 before the occurrence of all earthquakes with magnitude M≥6.0 in the Kanto region during the last two decades and the Kobe earthquake(1995-01-17).These results suggest that LURR theory is available for Japan.Recently they-value for Wakayama region has been near 1,while the y-value is remarkably larger than 1 for nearly two years for Kanto.According to these results,it is predicted that a strong earthquake with magnitude of about 6.0 could occur in 1 year or a little longer for in Kanto region or its adjacent regions,but there is little possibility for the Wakayama region.  相似文献   

地震预报新途径的探索     

尹祥础 《内陆地震》1996,10(4):337-341

为了探索地震预报的新途径，本文分析了各种现有主要地震前兆。尽管它们在地震预报工作中曾经起过并且今后还将继续起着重要作用，但是，这些前兆与地震的发生都不存在唯一性的对应关系。这表明，到目前为止，还没有找出这些地震前兆和地震孕育过程之间真正内在的本质联系。本文从震源介质的固有特征及非线性系统不稳定性问题的本质出发，借鉴经典力学中的量纲分析与现代信息论的概念，提出了一个表征孕震系统不稳定性逼近程度的新的无量纲参数Ｙ，称之为ＬＵＲＲ（加载／卸载响应比）。ＬＵＲＲ定义为式中，Ｘ＋和Ｘ－分别是孕震系统在加载和卸载时的响应率。  相似文献   

滑坡预测与风险评价专家系统   总被引：2，自引：0，他引：2  

张华杰  胡尊国 《地学前缘》1996,3(1):105-109

滑坡是一种常见的地质灾害，其预测过程十分复杂。文章介绍一个滑坡预测与风险评价专家系统ＬＦＥＥＳ。ＬＦＥＥＳ对滑坡的预测分为定性预测和定量预测两大类：定性预测以专家经验知识为基础，由符号推理产生定性的预测结；定量预测则由定量计算模型产生定量的预测结论。ＬＦＥＥＳ能够根据预测结论对滑坡灾害进行风险评价，并给出防治策略。讨论ＬＦＥＥＳ的总体结构、知识表示、推理方法和定量计算模型，并对ＬＦＥＥＳ用于滑坡多发城市重庆及其附近地区的几个典型滑坡的实现情况和预测结果进行了详细介绍。  相似文献   

兰坪思茅盆地第三纪矿床有机质特征及其地质意义   总被引：4，自引：2，他引：4  

陈广浩  尹汉辉  楚颖  刘德汉 《矿床地质》1996,15(4):373-380

兰坪思茅盆地第三纪矿床富含有机质，有机地球化学研究认为，矿床中的有机质片地未成阶段或低级成熟阶段，其分布受中轴断裂带的控制，有机质为少相、陆相的有机沉积物，生物标志显示盆地第三纪成矿为裂谷构造环境。  相似文献   

锰矿石的矿物平衡研究     

张勇  侯瑛 《矿物岩石》1996,16(3):32-35

本文应用热力学理论对不同价态锰的各种矿物的平衡关系进行了讨论，同时用湖南棠甘山和遵义锰矿石分析数据对其结论作了验证。  相似文献