暗纹东方鲀的人工繁殖

１９９５－１９９７年,以暗纹东方Ｔｕｎ进行人工繁殖,经ＬＨＲＨ－Ａ２催熟处理,雌鱼的性腺可以发育到Ⅳ期末,性腺发育达到Ⅳ期中以后的雌鱼注射激素能引进正常的排卵反应,试验用的催产药物为ＬＨＲＨ－Ａ２,ＨＣＧ和ＰＧ。在水温１６－２１℃的条件下,效应时间为６－８６ｈ,平均催产率为８７．５％,平均受精率为６１．８％,平均孵化率为５１．７％。     

赣东北蛇绿混杂岩带中硅质岩的地球化学特征及构造意义

赣东北蛇绿混杂岩带中含晚古生代放射虫硅质岩的ＳｉＯ_２含量变化范围为 ７８．４０％～ ８９．２８％,Ｓｉ／Ａｌ＝ ６．３～２３,Ｓｉ／Ａｌ比和Ａｌ_２Ｏ_３呈很好的负相关关系,表明它们含有 较高比例的陆源泥质沉积物．硅质岩样品的Ａｌ_２Ｏ_３／（Ａｌ_２Ｏ_３＋Ｆｅ_２Ｏ_３）＝０．５１～０．９０,Ｃｅ／Ｃｅ~·＝ ０,９１～１．２２, Ｌａ_ｎ／Ｃｅ_ｎ＝ ０．７６～１．１１, Ｖ＜Ｍ２０μｇ／ｇ,Ｖ／Ｙ＜２．６,Ｔｉ／Ｖ＞４０,一致表明这些硅质 岩形成于与大陆地壳物质输入密切相关的大陆边缘环境,而与大洋盆地、洋中脊环境无 关．因此,这些晚古生代硅质岩既不属于～ １．０Ｇａ蛇绿岩套“三位一体”中的一部分,也 不支持晚古生代扬子和华夏两个块体之间存在深海大洋盆。     

华Quan人工繁殖和早期发育的研究

１９９２年５－７月分别对９组华Ｑｕａｎ亲鱼进行的催们试验结果进行了分析，并对其早期发育进行了较为详细的观察。华Ｑｕａｎ受精卵在水温为２２－３３℃的条件下胚胎发育时间为５４－７６ｈ，水温３４℃左右时仍能正常发育；孵出时眼黑色，胸鳍基已形成，有发达的居氏管；孵出后第二天Ｐｕａｎ即充气，第三天可以摄食并能自由在水层生活。     

Relationship between H_2 release and seis-micity on Xiadian Fault

ＲｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎＨ_２ｒｅｌｅａｓｅａｎｄｓｅｉｓ－ｍｉｃｉｔｙｏｎＸｉａｄｉａｎＦａｕｌｔＱＩＮＧ－ＷＵＧＡＯ（高清武）,ＮＩＬＩ（李霓）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｌｏｇｙ,ＣｈｉｎａＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ,...     

中国东部的尾波衰减特征和Qc值估计

根据中国东部地区短周期近震记录尾波地动振幅Ａ随时间τ的经验衰减关系ｌｇＡ＝Ｇ－２．２３５１ｇτ，利用对震中距作校正的尾波单次散射理论，得出尾波校正振幅Ａｃ（ｒ，ｔ）曲线族，并计算出不同尾波时段的ω／２Ｑｃ值，并由此导出相应于各平均观测频率和采样深度的Ｑｃ（ｆ，ｈ）值。该结果与云南、北京和中亚地区的Ｑｃ观测值是基本一致的。     

对MG两篇文章的答复之二

简单查看一下ＭＧ针对１９８７－１９８９年这一时间段的图表可以发现以下两个事实；（１）回想一下预报只有在所报地震震级Ｍｐｒｅｄ≥５．０时才发布，真实的ＶＡＮ预报的成功率为７９％，在只将的地震当做预报成功时，成功率为４５％。（２）ＶＡＮ的预警率对于震级大时明显上升，如对于ＭＥＧ≥５．０，５．３，５．５，５．８，预警率分别为２２％，３６％，５．０％，６０％。这些事实与ＭＧ所谓的“ＶＡＧ”预报结果可归因于     

Travel time tomography inversion and the deep structure of the southern Tibet

ＴｒａｖｅｌｔｉｍｅｔｏｍｏｇｒａｐｈｙｉｎｖｅｒｓｉｏｎａｎｄｔｈｅｄｅｅｐｓｔｒｕｃｔｕｒｅｏｆｔｈｅｓｏｕｔｈｅｒｎＴｉｂｅｔＱＩＮＧ－ＴＩＡＮＬＵ１）（吕庆田）,ＭＥＩ－ＪＩＡＮＧ１）（姜枚）,ＫＡＩ－ＹＩＭＡ１）（马开义）,Ａ．Ｈｉｒｎ２...     

华鳈人工繁殖和早期发育的研究

1992年5月～7月分别对9组华鳈亲鱼进行的催产试验结果进行分析,并对其早期发育进行了较为详细的观察。华鳈受精卵在水温为22～33℃的条件下胚胎发育时间为54～74h,水温34℃左右时仍能正常发育;孵出时眼黑色,胸鳍基已形成,有发达的居氏管;孵出后第二天鳔即充气,第三天可以摄食并能自由在水层生活。     

藏北色林错流域的水文特征

本文报道了1997年降1998年夏季对藏北色林错等水体水文特征的考察情况,结果表明,色林错是一个大型深水湖泊,表层水温在下午4：30左右达到最高,清晨7：30左右时最低,浅水区域表层湖水在6月份的极端最高水温为21．2℃,极端最低水温为11．0℃,而日平均水温变幅仅5．6℃,其幅度大于在同一时段湖区内不同区域之间表层水温的变化,色林错湖水的pH值较高咪9．19－9．66;表层水的pH昼夜变化较小,仅0．15,最高值出现在凌晨,同时水体不同区域及深度的pH值基本一致,其溶解氧变化在4．62－5．12mg/L,而且不同深度水层之间的变幅较小,仅0．03－0．35mg/L;但其湖汊浆东如瑞溶解氧的昼认变幅为4．58－5．59mg/l;盐度的日变幅为1．60％－2．20％,考察表明,藏北水体的盐分有一个从河流到湖泊、以及由流水向静水富集的趋势;鱼类的分布与水体盐分的含量密切相关,即鱼类随着水体盐分的增加而消失,代之以嗜盐性卤虫的出现及大量繁衍。     

不同水温对红螫螫虾胚胎发育的影响

本文研讨了各种人控恒温和自然水温对红螯螯虾胚胎发育周期,各发育阶段以及胚胎发育成活率等的影响。对水温２４－３０℃,红螯螯虾的胚胎均能正常发育;最适发育水为２８～３０℃,２２℃以下或３２℃以上,胚胎不能正常发育。自然水温温差大,对胚胎发育有害,水温越高,胚胎发育越快,发育周期越短,成活率越低。     

A Monte Carlo study of rainfall forecasting with a stochastic model

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.     

Earthquake Engineering and Engineering Vibration Aims And Scope

正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and     

Foreword

Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States.     

WORLD ASSOCIATION FOR SEDIMENTATION AND EROSION RESEARCH(WASER)

正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study     

Enhancing remote sensing research on global change to improve our understanding on Earth system processes

正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases     

Solute concentrations in the lower niger river and the source rock contribution

Water quality analyses for the Niger River for the 1980/81 hydrological year are presented. The samples were collected from the main river at Lokoja, and from two main tributaries, the Kaduna and the Benue Rivers. Different water types were distinguished by the concentrations of major ions. The type Ca > Na > Mg > K - HCO₃ > SO₄ > Cl was represented at all stations during at least part of the year. Chloride was found to dominate the sulphate ion in the Kaduna and Niger, while the Benue maintained a higher concentration of sulphate relative to chloride all year round. Distinct patterns of seasonal variation in the ion concentrations were observed, particularly for the samples collected at Lokoja. Low ion concentrations were prominent during periods of high discharge, while low flow periods coincided with high dissolved ion concentrations. The contribution of rainwater to the total dissolved solids in the river waters was assessed indirectly using rainwater chemistry data from the Gulf of Guinea. The estimated rainwater contribution to the Lower Niger amounts to 5.15 mg 1^?1. Geochemical weathering calculations involving reactions of the four major minerals of granitic rocks - anorthite, biotite, albite, and K-feldspar - with carbon dioxide and water, can account for the average water composition of the Lower Niger. The proportion of the ionic components was also related to the occurrence of the respective element in the minerals.