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1.
给出了数字化地震记录P波初始部分平均出射角和方位角的分析处理方法,研究了山西大同ML=6.1级地震以及唐山ML=5.6级地震前出射角与方位角出现的异常变化,并对地震前地震波动力学特征的这一类前兆异常现象进行了初步讨论。  相似文献   

2.
结合喜马拉雅山板块运动 G P S 监测资料,较系统的讨论了 G A M I T/ G L O B K 进行精密 G P S数据处理的理论和方法,着重对 G A M I T 处理各时段解与 G L O B K 综合处理单时段解及其处理过程中应注意的有关问题做了较详细的讨论,对高精度 G P S 数据处理和分析具有重要参考价值。  相似文献   

3.
采MDS码构造了一种乘积码,并针对现有ARQ方案在受强干扰时效率迅速降低的缺点,提出了一种基于该乘积码的抗强干扰的自适应口Ⅱ混合ARQ方案。理论分析和计算机模拟表明个人案在信道受强干扰时,仍有较高的通过率和可靠性,优于目前的同类方案。  相似文献   

4.
利用《地震学分析预报方法程式指南》中的方法分析了鲁南地区的地震活动性异常,发现在苍山ML5.6级地震前,鲁南地区23个月无ML≥2.5级地震;在1985年6月新泰ML4.1级地震以后,ML≥3.0级地震主要集中在新泰苍山莒县之间的三角地带;1974年以后沿苍尼断裂的ML≥3.0级地震都发生在5.6级地震震中附近。地震应变能释放自198年以后出现较明显的加速过程;b值、地震活动度S值、最大震级缺震曲线均出现低值异常。  相似文献   

5.
新疆西滩金矿床同位素年代学研究   总被引:1,自引:0,他引:1  
东天山西滩金矿床是近年发现的重要金矿床。它具有较长的成岩成矿过程,石炭纪岛弧火山作用形成了矿体的围岩———安山岩(330 Ma) ,随后,特别是在碰撞造山期岩浆活动形成了英云闪长岩(293 Ma)、二长花岗斑岩(281 Ma) 、钾长花岗斑岩(266 Ma) 、流纹斑岩(256 Ma) 等。这种幕式发生的热动力,也导致288 ~285 Ma 青盘岩化及L1 号金矿脉276 Ma、L2 号含金贫矿脉261 Ma、热液爆破角砾岩244 Ma、L3 号金矿脉等成矿( 及相关热液活动) 演化过程( 大约持续44 Ma) 。工业金矿体是成矿流体热动力地质构造三者的最佳耦合。矿床属造山期低温浅成热液矿床。  相似文献   

6.
介绍中美合作建立的川滇GPS地壳形变监测网的布设和观测情况。利用GAMIT和GLOBK软件分别对已完成的两期观测数据进行了处理,基线相对精度优于0.1ppm。对两期观测的部分基线结果作了比较,得出了一些有益的结论  相似文献   

7.
作者提出了一种适用于100Mbps高速双绞线局域网传输信号MLT-3无冗余纠错方案。从理论上分析了该方案的纠错能力,并且由计算机模拟方法对该系统的误码率性能进行了检验。结果表明,该方案可纠正单个随机错码,在加性高斯白噪声环境下,可获得约2dB的系统增益而不需增加对传输带宽的要求。应用于100Mbps高速双绞线局域网,可提高传输可靠性,或者增加传输距离,或者降低发送电平以减少电磁辐射。  相似文献   

8.
火焰原子吸收光谱法测定岩石中银的介质选择ONTHEMEDIUMUSEDINDETERMININGSILVERINROCKSBYFLAMEATOMICABSORPTIONPOLAROGRAPHY火焰原子吸收光谱法测定岩石中银,选用不同介质各有优缺点。相...  相似文献   

9.
PAL法是近十年来应用于选治工业中的一种黄金选矿方法,它操作简单,适应性强,尤其能提高含砷、含硫等难处理金矿石的浸出率,从而降低生产成本,经济效益显著。该法在国外应用较普遍,经济效果明显。近年国内也相继对PAL法进行了研究与应用,而在我省PAL法的应用却相对滞后。因此,应加强对PAL法的应用试验研究,从而促进我省的黄金生产的发展  相似文献   

10.
本文着重讨论了利用java语言程序实现表格式文本文件到HTML格式表格文件的自动转换过程。  相似文献   

11.
介绍了反射波和折射波的 V S P C D P 同时成象方法,通过模型资料试算证实,对于大偏移距与深度比 V S P 资料或速度梯度大的 V S P 资料,反射波和折射波 V S P C D P 同时成像方法行之有效,而反射波 V S P C D P 迭加方法会得到错误的成像结果。  相似文献   

12.
2008���½�����Ms7.3���������Ԥ��   总被引:4,自引:2,他引:2  
?????й?????????????繤??????????仯?????????????2008???2?????????36.0??N??80.0??E????????200 km??Ms7.3????????????????????????????????????  相似文献   

13.
为建立社会主义市场经济的地矿工作新秩序,本文对国有地矿企业的经营者(厂长、经理)这一特殊群体进行了分析。着重研究了新形势下企业经营者实行年薪制的问题。指出年薪制就是以企业一个生产经营周期为单位确定经营者的报酬,这一周期通常为一年。进而阐述了为什么要实行企业经营者年薪制;企业经营者的收入应与职工工资完全脱钩;采用基础报酬加效益报酬的方法确定收入等等。并构想了实行经营者年薪制所需要的外部环境:建立经营者人才市场、经营者要能进能出、实行任职资格制度、建立风险机制、按劳动力市场经济规律办事。  相似文献   

14.
提出了利用HTMLParser和PDFBox工具包来编程实现对Web网页文本内容自动提取和PDF文档格式的转换并这些数据进行处理来适合HTK语言建模工具的要求。最后通过实验证明了采用该方法可以较好地实现语言模型的自动更新从而适应识别对象不断变化,同时减少了识别过程中的集外词并提高了语言模型的性能。  相似文献   

15.
Historical hydrographic data across several sections in the South China Sea (SCS) and Taiwan Strait have been reconsidered. The year-around existence of the South China Sea Warm Current (SCSWC) along the shelf break off the Guangdong coast and the seemingly year-around southwestward current to the east of SCSWC are both evident in the data. The data also showed that the northward current in the Taiwan Strait seemed to be the extension of SCSWC. A barotropic numerical model is employed to explain some of the observed features. Reasonable simulation of the circulation in the northeast part of SCS has been found.  相似文献   

16.
Tide gauge data are used to investigate sea level variability off the northwest coast of the South China Sea (SCS) in 2012, and a significant sea level elevation with a magnitude approaching 79 mm is observed. Analysis suggests that an abnormal sea surface heat flux and freshwater flux may have contributed to this abnormal rise in sea level, together with the remote influence of an ENSO event. Further investigation shows that the event was dominated by the positive freshwater flux, where large volumes of water entered the ocean, and a maximum is centered to the south of Guangdong province, China. Simultaneously, a positive anomalous heat flux occurred in the northwestern part of the SCS, which is considered to have made a positive contribution to the high local sea level elevation. In addition to the heat flux, the ENSO event also had a significant effect on the event, where the La Niña-induced northwest Pacific cyclone contributed to sea level rise over the northwestern SCS through dynamic and thermodynamic interactions.  相似文献   

17.
We used the conditional nonlinear optimal perturbation(CNOP) method to explore the optimal precursor of the transition from Kuroshio large meander(LM) to straight path within a barotropic inflowoutflow model,and found that large amplitudes of the optimal precursor are mainly located in the east of Kyushu,which implies that perturbations in the region are important for the transition from LM to straight path.Furthermore,we investigated the transition processes caused by the optimal precursor,and found that these processes could be divided into three stages.In the first stage,a cyclonic eddy is advected to the formation region of the Kuroshio large meander,which enhances the LM path and causes a cyclonic eddy to shed from the Kuroshio mainstream.This process causes the LM path to change into a small meander path.Subsequently,the small meander is maintained for a period because the vorticity advection is balanced by the beta effect in the second stage.In the third stage,the small meander weakens and the straight path ultimately forms.The positive vorticity advecting downstream is responsible for this process.The exploration of the optimal precursor will conduce to improve the prediction of the transition processes from LM path to straight path,and its spatial structure can be used to guide Kuroshio targeted observation studies.  相似文献   

18.
地理信息服务是地理信息发展的新阶段,当前的研究工作主要侧重在模式研究,而对于地理信息服务与企业和商业的具体应用研究目前还不多见。烟草行业是我国财政税收的重要来源,"数字烟草"是烟草企业的信息化的新的战略阶段。地理信息服务进入数字烟草将给烟草企业和相关商业带来革命性的变化。本文结合数字烟草论述企业地理信息服务的具体应用内容,并给出了相关的框架设计和应用实例。  相似文献   

19.
井间地震初至波分析   总被引:1,自引:0,他引:1  
在模拟对比不同模型条件下初至波的基础上,分析了造成初至不清晰两种可能的原因,一种是初至波为续至波所干扰,另一种初至波在垂直方向上的投影很小甚至为零。并指出可以综合利用水平分量和垂直分量记录来提高初至时间拾取的精度。  相似文献   

20.
Runnels are characteristic erosional features on karstified soluble rocks and can occasionally develop on less soluble rocks (i.e. sandstones and granites) but are poorly reported in Malaysia. This research summarizes boulder distribution, size, petrology and runnel morphology in a Pleistocene post-glacial mudflow on Mount Kinabalu. The goal is to investigate the runnel formation on granites. Colonization of boulders by cyanobacteria, mosses, lichens and higher plants is observed and related to rock surface meso-scale and micro-scale features. The coarse porphyritic texture of the granite contributes to the fragmentation and mechanical weathering of large K-feldspar crystals in the runnels. The damp runnel micro-environment is preferentially covered with mosses further enhancing weathering and erosion. As runnels deepen, the remnant protruding fins of rock weaken and may break off. The runnels are subaerial pseudokarst features, not the result of dissolution.  相似文献   

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