河南嵩山地区的三叠系   总被引：3，自引：0，他引：3  

席文祥  巴光进 《中国区域地质》1992,(3):226-228

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水库地震震级预测的回归模型     

光耀华 《华南地震》1993,13(2):72-78

对于大型水库,在作出诱震危险性评估以后,需要预测可能的发震震级.利用水库综合影响参数E与大量震例的实发震级进行回归,可以获得预测方程.本文依据文献的资料,研究回归模型的精度及误差问题,并给出经过优化后的预测方程.  相似文献   

太原盆地历史地震活动特征及未来地震形势估计     

光春云  孙国学 《山西地震》1993,(1):3-8

对公元1000－1985年太原盆地M≥4.0地震进行了时序分析，结果表明，它们在时间轴上和山西地震带及至华北地区有着相似的平静一起伏变化特点，以此划出4个地震活动期和若干活动幕，指出活动最大地震存在逐步升级现象；在空间上重复性高，形成3个地震巢和以巢为主的地震条带与地震跳迁现象，认为在2000年前后，太原盆地将处在地震高活动时段，有可能在地震巢附近发生若干个中强地震，山西和华北地区强震活动也有可能与之同步。  相似文献   

可控源张量大地电磁法     

Li  X 邓前辉 《地震地质译丛》1993,15(3):35-42

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土的抗剪强度試驗研究     

吳聖光 《水文地质工程地质》1959,(8)

土的抗剪强度是評价土体强度的主要因素,正确地确定它,对地基基础的承載力、土坡的稳定………等,都有着决定性的意义与經济价值。虽然土的抗剪强度在土木工程中已受到广泛的重视与应用,但人們对它的特性及一些现象问題,还沒  相似文献   

关于中国岩石绝对年龄的讨论   总被引：1，自引：0，他引：1       下载免费PDF全文

А.И.屠格林诺夫  С.И.兹可夫  程裕淇  Н.И.司徒普尼可夫  Н.И.波列娃娅  李璞  К.Г.克诺列  С.Б.布朗特  凃光炽  范嗣昆 《地质科学》1960,3(3):111-121

这个問題的研究是根据中国科学院地貭研究所和中国地貭部地貭研究所的倡議而进行的。参加这項工作的有中苏两国的科学工作者,其中包括中国科学院、苏联科学院、中国地貭部和苏联地貭及保矿部有关研究所的人員。由于有許多人参加这項工作,因而能在1957和1958年夏季收集了必需的岩石标本,并在1958-1959年室内工作期間对它們作了部分的研究。用以鑑定年龄的标本是为了編制中国第一个地貭建造年代簡表和进行华北前寒武系研究而采集的。它们包括了中国主要岩浆旋迴和变貭杂岩体。  相似文献   

利用气候优势,加快农业产业化进程     

温福光 《气象研究与应用》1999,20(2):44-45

分析了玉林市的气候优势,及对发展各种特产,进行产业化经营的影响,并提出发展优质产业,加快农业产业化步伐的建议。  相似文献   

苏联岩心钻探的若干情况     

光鹿 《地质与勘探》1976,(8)

据报道,1975年苏联地质部系统完成钻探1850万米,在第九个五年计划期间共完成8500万米,比第八个五年计划增长7.8%(表1)苏联每年的钻探工作量之大在世界上是少有的,但钻探技术经济指标与瑞典、美国相比仍然是较落后的.1975年全地质系统平均钻探台月效率为470米,台月效的年增长率达到5.5%,而1961～1965期间,年增率只3.1%,1966～1970为3.7%.与1970年相比,台月效率提高27.7%(表  相似文献   

The status of the ecological environment and a proposed protection strategy in Sanya Bay,Hainan Island,China   总被引：8，自引：0，他引：8  

Huang L  Tan Y  Song X  Huang X  Wang H  Zhang S  Dong J  Chen R 《Marine pollution bulletin》2003,47(1-6):180-186

Sanya Bay encompasses a high diversity of natural habitats, ranging from coral reefs, rocky and sandy shores and mudflats to mangroves. Seasonal physicochemical and biological investigations were conducted from 1998 to 1999 and again in April 2000. Water-related environmental quality in Sanya Bay is in good condition. The levels of dissolved oxygen, nitrogen, phosphorus and heavy metals are within the first class of National Seawater Quality Standards for China. Annual mean values of chlorophyll a of 0.93 mg m(-3) and phytoplankton primary productivity of 440.8 mgC m(-2)d(-1), respectively, were found in the waters, both of which show a significant correlation with inorganic nitrogen. A mean new productivity of 144.6 mgC m(-2) d(-1) was recorded in summer. Sanya Bay is rich in natural resources and biodiversity with 235 species of phytoplankton and 129 species of zooplankton identified in the survey. The annual mean abundance of phytoplankton and zooplankton were 1564 x 10 cells m(-3) and 121 individuals m(-3), respectively, with an annual mean zooplankton biomass of 129 mg m(-3). A total of 243 species of fish were sampled in the survey including many of high economic value. Three hundred and eighty-four species of benthos in 121 families were found by mud sampling and trawling. The average biomass of benthic organisms was 11.55 gm(-2), with a density of 31 individuals m(-2). Molluscs were the dominant group, followed by crustaceans; coelenterates exhibited the lowest biomass. One hundred and twenty-six species from 48 families of intertidal organisms were collected by frame sampling, with a mean annual biomass of 644.7 gm(-2) and average density of 816 individuals m(-2). The highest biomass of 1673.5 gm(-2) was collected in a coral reef region, while the highest density of 1219 individuals m(-2) occurred in a mangrove region. The coastline is characterized by coral reefs that accounts for 30% of the total coastline length in the bay, so coral reefs are a key ecosystem that are important for maintaining the regional marine resources and biodiversity. We need to pay much more attention to such diverse marine resources to maintain the integrity and function of these coastal ecosystems.  相似文献   

Observational estimation of heat budgets on drifting ice and open water over the Arctic Ocean   总被引：9，自引：0，他引：9  

卞林根  高志球  陆龙骅  张雅宾  C.Roger  X.D.Zhang 《中国科学D辑(英文版)》2003,46(6):580-591

It is of major scientific interests to determine the parameters of momentum, heat and vapor exchange in the planetary boundary layer in order to study the effects of ocean-ice-atmosphere interactions and their feedback mechanisms on global climate[1]. Lin…  相似文献