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采用VB6.0编制形变数据快速转换软件,可以将epd格式的形变数据转换成Mapsis所要求的格式,便于研究人员使用.牡丹江地震台形变数据快速转换软件已在牡丹江地震台调试通过,使用效果较好,便于推广应用. 相似文献
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利用记录较好的地脉动数据,提取能够反映地下介质的特征量,存储在数据库中.利用编写的绘图程序,可以把数据库中地脉动参数值以变化曲线的方式进行显示,也可以按固定格式进行导出,尝试寻找地脉动参数值变化与地震的对应关系. 相似文献
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前言“地震数据文件管理组”主要是为了管理地震年报和地震月报的数据。地震数据格式以子记录为单位被建立在五吋软磁盘內。一个月的地震数据就构成一个“地震数据文件”。解调数据文件可以生产地震月报的排版格式,可供影印制版印刷。编制印刷国际地震中心ISC所规定的震中参数格式数据,震相参数格式数据,作为同ISC交换地震资料使用。与此同 相似文献
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地震数据交换标准（ＳＥＥＤ）是国际地震数据交换的一种标准格式。本文简要介绍了台站磁带的ＳＥＥＤ格式，详细分析了带有可变头段节的数据记录的结构，并给出了从带有可变头段节的数据记录中提取地震数据的实例。 相似文献
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“九五”期间各个数字测震台网利用北京港震机电技术有限公司提供的EDSPRTP实时数据处理系统接收各个数字地震台站数据并将数据保存为EDAS格式的连续波形文件.本文介绍EDAS格式波形文件的结构以及利用C语言编写程序,从而实现通过读取地震目录文件得到地震事件的发震时刻和震级,然后自动截取地震波形并且保存该地震事件. 相似文献
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引言 目前，NCDSN台站已经并入中国数字台网的运行之中，由于系统稳定，数据质量高而受到国内学者的青睐。当前，NCDSN台站多采用一台微机进行SEED数据的实时记录（REALTIME），实时监视（REALPLOT），SEED格式与WGSN格式的转换，地震分析（DIMAS）和速报，为此，效率十分低下。系统经常死机，难以保证地震数据的连续记录万无一失。针对这个情况，我台利用WIN98的局域网互联技术，对我台NCDSN的分析系统进行了优化配置，组建了基于NCDSN的网络分析系统，实现了SEED数据的共享，互联网路共享。这样，不仅提高了地震… 相似文献
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M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
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Gtz Schroth Luciana Ferreira Da Silva Marc‐Andree Wolf Wenceslau Geraldes Teixeira Wolfgang Zech 《水文研究》1999,13(10):1423-1436
The partitioning of rain water into throughfall, stemflow and interception loss when passing through plant canopies depends on properties of the respective plant species, such as leaf area and branch angles. In heterogeneous vegetation, such as tropical forest or polycultural systems, the presence of different plant species may consequently result in a mosaic of situations with respect to quantity and quality of water inputs into the soil. As these processes influence not only the water availability for the plants, but also water infiltration and nutrient leaching, the understanding of plant effects on the repartitioning of rain water may help in the optimization of land use systems and management practices. We measured throughfall and stemflow in a perennial polyculture (multi‐strata agroforestry), monocultures of peach palm (Bactris gasipaes) for fruit and for palmito, a monoculture of cupuaçu (Theobroma grandiflorum), spontaneous fallow and primary forest during one year in central Amazonia, Brazil. The effect on rain water partitioning was measured separately for four useful tree species in the polyculture and for two tree species in the primary forest. Throughfall at two stem distances, and stemflow, differed significantly between tree species, resulting in pronounced spatial patterns of water input into the soil in the polyculture system. For two tree species, peach palm for fruit (Bactris gasipaes) and Brazil nut trees (Bertholletia excelsa), the water input into the soil near the stem was significantly higher than the open‐area rainfall. This could lead to increased nutrient leaching when fertilizer is applied close to the stem of these trees. In the primary forest, such spatial patterns could also be detected, with significantly higher water input near a palm (Oenocarpus bacaba) than near a dicotyledonous tree species (Eschweilera sp.). Interception losses were 6·4% in the polyculture, 13·9 and 12·3% in the peach palm monocultures for fruit and for palmito, respectively, 0·5% in the cupuaçu monoculture and 3·1% in the fallow. With more than 20% of the open‐area rainfall, the highest stemflow contributions to the water input into the soil were measured in the palm monocultures and in the fallow. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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M. A. Kahn 《洁净——土壤、空气、水》2000,28(2):95-101
Red tide, a recurrent phenomenon has become conspicuous in several Kashmir lake ecosystems since 1991. The responsible organism (Euglena pedunculata), a rare flagellate rediscovered in the Kashmir Himalaya (Khan 1993) caused first and unprecedented red tide outbreak, constituting a maximum of 96% of resident numerical phytoplankton density in Dal Lake. At present, conflicting hypotheses exist on the generation of causal assemblage(s) imparting redness to waters: Jeeji Bai (1991) linked its origin to acid precipitation – a fallout of burning oil‐fields during the Gulf War – whilst Khan (1993) holds local factor(s) responsible. Field/experimental studies support the latter contention that the influx of untreated sewage, in unison with warm temperatures, high levels of PhAR, iron and interruption to hydrological flow‐pattern together with absence/or reduction in grazing activity created conducive environmental milieu for red tide outbreak. Dal Lake “red tide” drifted the bloom‐inoculum to other waters, including Lake Wular, where additional ecological niches were carved out, threatening the aesthetic value and biological diversity of Kashmir lakes. Ecological monitoring indicates frequent seasonal red tide occurrence in Dal Lake (including summer‐autumn event of 1998) which testifies its unabated eutrophication status. Further studies are needed on ecological adaptability and biogeographic distribution of this rare and unique red tide‐causing flagellate. 相似文献