煤层成因和煤相研究历史回顾及其研究现状

简要回顾了国内外煤相研究的发展历史，讨论丁煤相研究的主要内容，从煤岩学、沉积学、地球化学及古植物学等4个方面总结了煤相类型划分的主要依据，在此基础上对目前煤相研究的主要方法进行了归纳。     

学尹公制定地层命名法的基本精神及治学的道德风范－－纪念老师尹赞勋诞辰100周年

本文通过对地层命名法的基本精神和原则－－以发表（或出版）为基础的优先权法则的学习心得叙述,回顾尹赞勋院士当年在制定中国地层命名法时,坚持一个新名建立必须在公开发行的出版物上发表这一符合全世界生物地学界共识的地层命名法的哲学精神方面所做的重要贡献和意义。作者对比全国地层委员会今天对优先权采用双重标准,从而干扰地层命名法的基本精神执行,显示尹公制定地层命名法所持的基本精神明智,正确和意义重大。文章通过“龙马页岩”改为“龙马溪页岩”这一正确订正,解决了其与“龙马石灰岩”的同名关系事例,感受到尹公治学的高尚道德风范。     

回忆恩师——李连捷

李连捷先生是我国土壤科学的创始人之一,也是我国土壤科学的教育家,为土壤科学发展的地学理论基础和生产应用做了大量工作。我作为李连捷先生的研究生,有幸在先生身边度过了10年,切身体会到了他对研究生的关心和培养。他不仅教我学业,而且教我做人。他渊博的知识、宽广的胸怀和幽默的谈吐让我难忘。他注重调查研究,力求理论与生产实践相结合;他不墨守成规,注重创新发展;他精益求精,不畏困难,不怕挫折,乐观地面对人生都给我留下了终生受益的精神财富     

浅议当前气象行政执法体系建设问题

气象行政执法体系主要应由法制管理机构、法制队伍、执法依据、法制工作机制以及法律约束监督制度等构成,研究分析当前我国气象部门行政执法体系建设的现状,明确气象行政执法体系建设的目标任务,提出相应的解决措施办法,对于贯彻落实“依法治国”方略,履行好《中华人民共和国气象法》赋予各级气象主管机构的行政执法职责非常必要。     

美国数值预报研究动态与业务进展

介绍了近年来美国数值预报研究和业务应用方面的进展和动态,简述了资料分析与同化,高分辨率模式,短期集合预报,热带气旋预报及物理过程参数化等方面的技术进展,并提出了为使数值预报适应未来高性能巨型计算机技术的发展需要考虑的关于模式分辨率,资料的观测及分析同化技术等问题。     

HNO3 and PSC Measurements from the Transall: Sequestering of HNO3 in the Winter of 1994/95

In the winter of 1994/95 the TRANSALL research aircraft performed several flights in the region of the Arctic vortex during the period of low stratospheric temperatures. The results of simultaneous measurements of HNO3 column amounts by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) and of aerosol backscatter profiles by the Ozone Lidar EXperiment (OLEX) are presented for two typical flight scenarios across the polar vortex boundary on December 17, 1994 and January 11/12, 1995. On December 17 and January 12, the column amounts of gaseous HNO3 decreased significantly in regions with low stratospheric temperatures. This decrease was correlated with the extent of the polar stratospheric clouds. Depolarisation measurements showed that type Ib PSCs were observed primarily, but equilibrium calculations for H2SO4/HNO3/H2O aerosols seem to underestimate the observed HNO3 sequestering.     

中国大地震的天体位置特征分析

为探寻太阳系天体位置的变化对大地震发生的影响,作者分析了1900-1996年发生在中国7级以上大地震的天体位置特征和引潮力．分析结果表明,太阳系天体的特殊位置的确对地震的爆发起到了一定作用,太阳系10个天体中,又以月亮影响最大,本世纪71％的大地震发生于赤白交角从极大变为极小时期,对引潮力的分析表明,其水平分力更易触发大震,这与大震时10个天体天顶距集中分布于40°─140°之间是一致的,文中对此作了初步讨论,认为天体引潮加速度触发地震不在于某一量值,而在于其变化量的大小．     

地震科技信息的优化管理与数据库的建立和应用

天津市地震局从贯彻执行国家地震局预测预防司的有关文件做起,结合其地震科技信息工作的特点,从优化管理入手,借助现代化的工具和手段,建立了文献管理数据库,并在实践中加以应用,以增强服务功能,更好地为防震减灾服务。     

New techniques for auroral irregularity studies with COSCAT

The COSCAT system enables the detection of E-region auroral backscatter with the EISCAT remote receivers at magnetic aspect angles close to 90°. This is achieved by utilising a low-power transmitter stationed in Oulu, Finland. Many important observations of E-region irregularities have been achieved with this simple experiment. Recent studies have attempted to push the COSCAT system to its experimental limits. Firstly, the CW signal has been phase-modulated with 13-bit Barker codes with baud lengths of 40, 70 and 100 s. Interpretation of the received power allows the spatial distribution of the auroral scatterers to be determined. The second advance is in the use of a sophisticated correlator program which allows data to be buffered within the correlator at very high time resolution. This enables the coherent backscatter power to be sampled every 12.5 ms and the full auto-correlation function to be measured every 100 ms. These measurements allow the COSCAT system to be employed for the first time in an investigation of the growth and decay of the auroral irregularities.     

Revision of the basic equations of wave distribution function analysis

The basic equations of wave distribution function analysis are rewritten in forms that treat the electric and magnetic fields of the waves in a more symmetrical way than the original equations do, and are slightly better for computing.