新型质子旋进磁传感器的研制     

黎珠博  柴剑勇  黄晖  严兴 《华南地震》2010,30(2):119-122

新型质子旋进磁传感器在传统探头的基础上,根据新的观测环境要求对探头进行了改进,在实现无向性观测的同时,进一步提高了探头线圈的Q值及抗干扰能力,为提高观测系统的信噪比、降低仪器功耗创造了重要的条件。  相似文献   

应用于地磁相对记录的数字矢量磁力仪     

王晓美  滕云田  谭婧  王喜珍  王晨  吴琼 《地震地磁观测与研究》2010,31(2):77-82

地磁相对记录的任务是连续记录因电离层中的电流体系引起的地磁场变化。本文详细阐述了应用于地磁相对记录的数字矢量磁力仪的工作原理、信号处理电路设计以及发展趋势。  相似文献   

漠河地磁台初步勘选结果   总被引：1，自引：0，他引：1  

吴海军 《地震地磁观测与研究》2010,31(2):113-120

介绍了对拟建设的黑龙江省漠河地震台地磁观测场地进行的勘选,应用G856质子旋进磁力仪,采取十字剖面测量和200 m×200 m的密跨度(梯度)测量的方法,进行地磁场总强度F测量。经过对测量结果进行计算和初步分析处理后,认为:该场地适宜地磁台站建设。但是,如果确定在此建设地磁观测台站,还应按相关的规范和标准,进行深入的、详细的勘测。  相似文献   

FHDZ-M15与G856总强度观测基线值稳定性浅析     

杨维辉  吴海军  孙炜  田平 《地震地磁观测与研究》2012,33(5):236-239

对德都地震台2011年1月-10月的基线值资料进行整理,用FHDZ—M15地磁组合观测系统F值和G856人工观测F值,分别计算基线值,对观测值和基线值进行对比分析,得出绝对观测中用人工观测F的重要性,地磁组合观测系统FHDZ-M15的稳定性,以及相对记录仪与绝对观测相互验证的关系。  相似文献   

高温超导磁强计在瞬变电磁法中的应用研究   总被引：3，自引：1，他引：2       下载免费PDF全文

陈晓东  赵毅  张杰  吕国印  马平  戴远东 《地球物理学报》2012,55(2):702-708

通过对高温超导磁强计的不断完善,研制出了适合在瞬变电磁法中使用的高温超导磁强计,实现了在瞬变电磁法中直接测量磁场的目的.同时开展了瞬变电磁法感应磁场的数据处理与解释技术研究,开发了瞬变电磁法感应磁场的电性成像软件,可以对使用高温超导磁强计作传感器测得的瞬变电磁感应磁场数据进行处理与电性成像.野外实验表明:高温超导磁强计工作稳定,在瞬变电磁法中使用高温超导磁强计比使用感应线圈做传感器提高了勘探深度.  相似文献   

红山地震台地磁GM4仪与FHD-2B仪观测资料对比分析     

贾华  高登平  王利兵  胡秀娟  陈凯男 《地震地磁观测与研究》2015,(3)

通过对2013年红山地震台地磁GM4磁通门磁力仪与FHD-2B质子矢量磁力仪产出的观测资料进行对比,系统分析两套仪器分均值、日均值和基线值的变化趋势,并对仪器背景噪声做相应对比,认为观测数据变化趋势一致,而GM4仪观测精度较大。  相似文献   

Early post-cleavage stages and abnormalities identified in the embryonic development of chokka squid eggs Loligo vulgaris reynaudii     

《African Journal of Marine Science》2013,35(1):379-382

Six early, post-cleavage embryonic stages for chokka squid Loligo vulgaris reynaudii eggs that were developed in an aquarium are identified and described, expanding the embryonic stages for this species from 14 to 20. The influence of water temperature on embryonic development is described. At temperatures <12 and >15°C, high percentages of morphological abnormalities were observed in embryonic development. Gross forms are described and illustrated.  相似文献   

Direct hydroacoustic observations of chokka squid Loligo vulgaris reynaudii spawning activity in deep water     

《African Journal of Marine Science》2013,35(1):387-393

Unusual and distinct hydroacoustic targets were observed in November 1996, May 1998 and November 1998 during routine pelagic biomass surveys off the south coast of South Africa. During the November 1996 survey, seven such targets were observed near the bottom at depths of 115–125 m, directly south of the traditional inshore spawning grounds of chokka squid Loligo vulgaris reynaudii at Cape St Francis. The targets were close to prominent seabed ridges and extended 30–40 m off the bottom. In May 1998, three similar targets were observed at depths 55–80 m off Plettenberg Bay, another well-known squid spawning site. The shallowest target was identified, by means of a midwater trawl, as a mixture of mature male and female chokka. During the November 1998 survey, nine similar targets were again observed on the squid spawning grounds at Cape St Francis, also adjacent to seabed ridges. Drawing on fisheries hydroacoustic experience and knowledge of chokka squid spawning behaviour, the targets are believed to be aggregations of spawning squid.  相似文献   

Geomagnetic Variation Anomalies In Peninsular India     

N. K. Thaku  M. V. Mahashabde  B. R. Arora  B. P. Singh  B. J. Srivastava  S. N. Prasad 《Geophysical Journal International》1986,86(3):839-854

Summary. Geomagnetic substorms recorded by an array of magnetometers over peninsular India have been analysed to investigate the subsurface electric configuration of the area. the study considered only night-time events when the external inducing field is uniform over the Indian peninsula and the conventional interpretational techniques of geomagnetic deep sounding can be readily applied. Contour maps of Fourier transform amplitudes and phases along with real and quadrature Parkinson arrows are presented. Their features reveal a complex anomaly pattern. the observed anomalies can be classified into: (i) southern peninsular anomalies, (ii) Palk Strait anomalies, (iii) Pondicherry rift anomalies, and (iv) anomalies in the central region. A large-scale induction process seems to be disturbed by localized perturbations. the prominent anomaly observed over the southern tip seems to have a direct relevance to the tectonic setting of the Indian ocean and adjoining areas.  相似文献   

Simultaneous seismic and magnetic measurements in the Low-Noise Underground Laboratory (LSBB) of Rustrel, France, during the 2001 January 26 Indian earthquake     

S. Gaffet  Y. Guglielmi  J. Virieux  G. Waysand  A. Chwala  R. Stolz  C. Emblanch  M. Auguste  D. Boyer  A. Cavaillou 《Geophysical Journal International》2003,155(3):981-990

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