云南及邻区中强震连发和平静与强震关系研究

系统研究了1925年以来云南及邻区5级以上地震的时间分布特征, 分别给出了云南及邻区5级以上地震连发和平静的定义。 分析了中强震连发、 平静的一些基本特征, 研究了5级以上地震连发、 平静事件与该区强震活跃、 平静过程的关系。 这些分析结果对云南及邻区的地震趋势预测有一定实际意义。     

领导班子中副职的位置浅析

根据中央有关精神 ,我省气象部门各级领导岗位新配备一些年轻副职领导干部 ,与这些同志接触 ,他们表现出了极大的工作热情 ,同时也流露出副职工作有些地方不好把握 ,甚至出现主观动机与客观效果不一致的现象。主要表现在对下层布置工作尚可 ,在班子内部工作关系处理上显得心里没底 ,大胆工作怕影响团结 ,处处请示与沟通又怕群众说自己没有主见。笔者作为人事部门的工作人员 ,谨在这里与年轻副职同志谈一些粗浅的认识 ,认为副职在工作中应注意以下几点 ,即 :识位、定位、到位、不越位。1　副职要正确认识自己的位置无论哪一级领导班子 ,副职…     

青藏高原冬春积雪异常与中国东部地区夏季降水关系的进一步分析

为了进一步分析青藏高原(下称高原)冬春积雪异常与中国东部地区夏季降水的关系,利用1957～1994年高原地区的实测雪深、1951～1994年6～8月中国东部地区226个均匀分布测站的实测月降水量,以及美国国家环境监测中心/国家大气研究中心(NCEP/NCAR)1958～1994年1～12月的再分析格点值资料,对比分析了高原冬、春季多、少雪年后期中国东部地区夏季(6～8月)降水分布和环流的平均特征,也分析了高原积雪影响的机理.分析结果表明:1) 平均来说,多雪年夏季长江及江南北部降水可偏多1～2成,华北和华南的降水则偏少1～3成;少雪年夏季江淮流域及湘、黔地区少雨,华北和华南多雨.2)高原冬、春积雪不仅影响了后期高原的热状况,而且影响了后期东亚大气环流的季节变化和南亚与东亚的夏季风环流.     

云南腾冲火山地区的地震类型

详细记述了与腾冲火山活动有关的历史地震资料,重点分析了１９６１年６月１２日腾冲玉壁山Ｍ５．８级地震和１９７６年７月２１日腾冲Ｍ５．１级地震的类型,半讨论了腾冲火山地下介绍与周边地区的差异性,结果表明,发生于腾冲火山地区的地震,有部份属于火山地城类型,腾冲火山不是死火山,火山下部的岩浆仍在活动。     

台湾暖流起源的研究

根据台湾东北海域的水文资料分析，作者对台湾暖流起源提出以下看法：台湾暖流起源于黑潮分支和台湾嗳水，黑潮分支为主要源泉．台湾暖流的深层水完全来自黑潮分支的深层水，不具有暖流性质，而其上层水是由黑潮分支的上层水和台湾暖水组成。由于台湾暖水有明显的季节变化，与此相应，台湾暖流也发生相应的变化。     

小型底栖生物取样方法的研究

1984年4月在秦皇岛新煤码头砂质中潮带,用内径分别为1.8,2.2和3.4厘米的有机玻璃管各随机取样5次,芯样长28cm,所得海洋线虫密度(个/10厘米~2)分别为1497-2200,1262-1704和1162-1715单因子方差分析的结果表明,这三种内径的取样管所得海洋线虫计数的平均数之间没有显著的差异(F相似文献   

EFFECTS OF CO—CULTURE AND SALINITY ON THE GROWTH AND AGAR YIELD OF GRACILARIA TENUISTIPITATA VAR LIUI ZHANG ET XIA

Gracilaria tenuistipitata var Liui were mono-cultivated and co-cultivated with Pinctada martensii under high(33) and low(21) salinity conditions in laboratory.The daily growth rate of the alga was determined.Tissue carbon and nitrogen contents,the yield and fractional composition of agar were analyzed.Results showed that:1.Gracilaria grew better under low salinity conditions,the daily growth rate was twice that under high salinity conditions.Co-cultivated algae grew faster than mono-culti-vated algae under low salinity conditions,the daily growth rate was about 37.6?higher.2.Compared with mono-cultivated algae,tissue nitrogen contents of co-cultivated algae were higher,while the C:N ratios were much lower.3.The agar yields of co-cultivated algae were much lower than those of mono-culti-vated algae.Agar yield was found to be negatively correlated to the tissue nitrogen contents,and positively correlated to the C:N ratios.4.The highest fractional yields obtained from co-cultivated algae were extracted with 40?ethanol,while from mono-cultivated algae,the highest fractional yields obtained were extracted with distilled water at room temperature.     

PHYLOGENETIC RELATIONSHIPS AMONG PUFFERFISH OF GENUS TAKIFUGU BY RAPD ANALYSIS

AmpLifications with 300 10-base primers under predetermined optimal reaction yielded 2762 reproducible amplified fragments ranging from 200 to 3000 bp. Genetic distances among five species of Takifugu and Lagocephalus spadiceus as outgreup were calculated based on the presence/absence of the amplified fragments. Topological phylogenie trees of the 5 species of Takgfugu and the outgroup were gen-erated by Parsimony and Neighbor-Joining analysis based on RAPD data set. The genetic distance between T. rubripes and T. pseudommus was almost the same as that between individuals within each species, but was much smaller than that among T. rubripes, T. pseudommus and the other species. The molecu-lar data from RAPD analysis convincingly showed that T. rubripes and T. pseudommus should be the same species.     

锆石晶形统计在花岗岩体研究中的应用

锆石晶形的变化主要决定于产出母岩的岩石化学特征,尤其赴SiO_2、K_2O、Na_2O、CaO、Al_2O_3等主要组分的相互比例关系。在一定区域范围内,花岗岩类岩石的岩石化学成分的演化发展,在时间上有一定的变化规律,用晶形统计方法能定量地反映锆石的晶形特征及其变化趋势,有助于对花岗岩体的对比和岩石研究。