流动注射—试钛灵分光光度法连续测定岩石中全铁和钛

流动注射—试钛灵分光光度法测定岩石中全铁和钛,是在原有方法的基础上,引进了流动注射技术,从而提高了样品的分析速度、准确度、精密度,并使样品测试的线性范围有了明显的改善。本方法快速、灵敏、简便、可靠,每小时提供110个测试数据,其铁、钛的相对标准偏差分别为0.82％和2.87％。     

A study of the magnetically sensitive line FeI λ5324.191

For the spectral line FeI λ5324.191, we solve numerically the Unno equations to get the profiles of the Stokes parameters, and found that it has a large magnetic intensification and is not excessively temperature-sensitive. We conclude that it is proper to use this line as the working line of video-magnetic graphs.     

On the determination of the earth''s rotation using the McDonald lunar laser ranging data of 1971.6 – 1979.0

Using 1658 normal points of the McDonald lunar ranging data in the period 1971.6–1979.0, I calculated the Earth's rotation curve, and found an offset of −330 × 10⁻¹⁰ for UT₁ – UTC. The difference between the UT₁ values given by the lunar data and BIH is 3.6 ms. This difference and the standard error of single determinations increase with increasing interval length used in the data reduction. This is shown to be due to the neglect of the secular term in UT₁-UTC. It appears that an interval length of 2 days is suitable when calculating the Earth's rotation.     

超大型矿床锡矿山锑矿成矿地质条件研究

锡矿山锑矿属世界性的超大型矿床,它赋存在一个独特的构造抬升块中。表层褶皱是重要的控矿构造,基底断裂为主要导矿构造;矿田出露地层水源补给条件较好,是良好的供卤环境,佘田桥组中段为理想的赋矿岩系;硅化岩是锑矿化有利的寄主岩石;成矿物质,来源于矿田深部古水热活动区的前泥盆系;隐伏酸性岩体是古水热活动/循环的理想热源。锡矿山锑矿,是形成于古水热活动区的典型矿床。     

雷电滤波器

本文叙述了两种雷电滤波器的工作原理及其使用方法。     

The hydrodynamical characteristics of nearshore waters and the discharging process of mud flats— A case study of the mud flats near Lianyungang,China

It is apparent that there is a difference between mud coasts and sand coasts in such aspects as sediment components, hydrodynamics of nearshore waters, and the formative process in configuration, and profile. The intensity distribution of waves affecting the mud flats in Lianyungang, and the conditions determining tidal water levels, are discussed in this paper. A mathematical model which describes the erosion process of mud flats has been derived on the basis of the results of tests for the mud process in seawater. The model is satisfactory for the actual mud flat profile change in Lianyungang with artificial mud discharges.     

太阳射电爆发中Spike辐射的准周期振荡

本文介绍了在1981年5月16日微波大爆发中毫秒级时间轮廓Spike辐射中发生的准周期振荡现象。这种准周期振荡可能与日面活动区磁杯中的阿尔芬波运动有关,由此我们可以得到爆发源区一些基本物理条件。最后对于准周期振荡现象对Spike辐射的作用和影响作了简单的讨论。     

An experimental study on variation of <Emphasis Type="Italic">b</Emphasis> value during deformation of rock samples with different structural models

A preliminary study of b value of rocks with two kinds of structural models has been made on the base of a new acoustic emission recording system. It shows that b value of the sample decreases obviously when the sample with compressive en echelon faults changes into a tensile one after interchange occurs between stress axis σ ₁ and σ ₂. A similar experiment is observed when the sample with tensile en echelon faults changes into that with a bend fault after two segments of the en echelon fault linking up. These facts indicate that the variation of b value may contain the information of the regional dominant structural model. Therefore, b-value analyses could be a new method for studying regional dominant structural models.     

中国人口迁移的区域差异与流场特征

通过2000年人口普查省际迁移数据的分析,揭示了当代中国人口迁移的区域分异性,以及不同原因的流场新模式。研究发现,中国人口迁移进入高活性、高能力的新阶段;东中西部人口迁移的不平衡性不断加剧,“中部塌陷”不仅是经济意义上的,而且也是社会意义上的;人口省际迁移的辐合流场与辐散流场在进一步发展,珠江三角洲是最大的迁移辐合中心;东北与山东的对流渐趋消失,西北取代东北成为非沿海区域新的人口引力中心;以秦岭-淮河线东段和黑河-腾冲线南段为界,人口迁移分裂为东南和西北两大“流域”。就业迁移的优势程度在进一步加大,市场取代计划成为人口和人才流动的第一动力;婚姻迁移的主流方向是西南贫困山区指向华东农村,形成了西南“喀斯特新娘输出区”。     

Zonal propagation of kinetic energy and convection in the South China Sea and Indian monsoon regions in boreal summer

As early as in the 1980s, Chinese scientists hadfirst proposed that there exits two summer monsoonsystems in Asia, namely the East Asian summer mon-soon (EASM) and the Indian summer monsoon(ISM)[1-4]. The two monsoon systems are quite dif-ferent in characteristics. Since then, such issue andconclusion had been documented and approved by alot of studies in the past two decades, and was appliedin the guideline of the South China Sea summer mon-soon experiment (SCSMEX), which was undertak…