广东莲花山钨矿床中分散钨赋存情况及有用元素综合利用的研究

在承担《南岭地区典型钨矿床矿石物质成分及综合利用前景研究》专题中,应广东莲花山钨矿的要求,重点对该矿床三号矿体进行了野外观察,采样及大量室内工作,在分散钨,有价元素的赋存状态,空间分布及其综合利用的研究方面比前人有所前进.     

The advances in the studies on general circulation and large-scale dynamics,and their prospects for the year of 2000

In this paper, we review the progress made in the studies on general circulation and large-scale dynamics. We divide the advances in the studies on the atmospheric circulation and large-scale dynamics into 4 stages, i.e., the studies on atmospheric wave dynamics; the studies on the observational facts of general circulation; the numerical studies on general circulation; and the studies on planetary wave dynamics, wave-mean flow interaction and nonlinear dynamics. Moreover, the prospects of the studies on the atmospheric circulation and large-scale dynamics for the future are also made in this paper.     

EVOLUTION OF LARGE SCALE DISTURBANCES AND THEIR INTERACTION WITH MEAN FLOW IN A ROTATING BAROTROPIC ATMOSPHERE —PART I

The problems on evolution of large-scale disturbances and their interaction with mean flow recently attract much effort of meteorologists due to their practical importance in weather and climate predictions. In this paper, some theoretical results obtained in current investigations of these problems will be reviewed. A barotropic atmosphere is taken in this paper, and the baroclinic atmosphere is left in our second paper.The following aspects are reviewed: First, the general properties of two-dimensional barotropic motion both in the nonlinear and linearized equations and both in the quasi-geostrophic and non-geostrophic models. Second, the evolution and the structure of Rossby wave packet superimposed on a zonal or non-zonal basic flow.In this part, only the above two problems are reviewed. The rernanent problems, i.e., the normal modes and continuous spectra of both quasi-geostrophic and non-geostrophic models, weakly nonlinear theory and the fully nonlinear theory will be discussed in part II (another paper).     

大气中的二氧化碳含量

本文综述自然界二氧化碳的循环;大气中二氧化碳的源和汇,大气中二氧化碳的空间分布和时间变化;讨论人类活动对大气中二氧化碳的影响,特别是大气中二氧化碳浓度的变化趋势及其预测问题.     

稳定层结140米以下风廓线的研究

在稳定层结情况下,考虑到140米以下大气中局地摩擦速度u_*随高度的减小及混合长l随高度的非线性变化,将近地层由理论获得的通量—梯度关系推广到140米以下大气,得到了改进的风廓线公式.利用北京325米气象塔的资料进行检验,误差较小.若将近地层的廓线公式直接应用到140米以下大气,则误差明显比改进的风廓线公式的误差大.     

Reef-controlled Mineral Deposits in Southern China

Reef-controlled mineral deposits in southern China are divided into three types in this paper based on the relative importance of organic reefs in the ore-forming processes; they are: the direct type, indirect type, and passive type. The case histories of several typical deposits are discussed. In studying reef-controlled deposits, more attention should be paid to the function of synsedimentary faults in reef construction and mineralization and the importance of oil-gas palaeoreservoirs in reef rocks for the formation of sulfide deposits, in addition to analysing the favourable sedimentary facies of mineralization.     

PC—1500A型微型计算机在金的光谱分析中的应用

本文阐明BASIC语言编写程序,将光谱分析法测定金所得的分析数据输入计算机,可由计算机打印出样品的分析线黑度、内标线黑度、金的含量等分析结果和数据,方法经实际应用,证明简便、快速,而且十分可靠。     

On the generation and maintenance of atmospheric disturbances

Blocking is one of the intensive atmospheric disturbances which can maintain for a long time. In this paprer we investigate the general conditions favorable for the generation and maintenance of the intensive disturbances. First, the evolutional process of disturbances superimposed on a jet-like zonal flow is studied by using the wave-packet representation and the WKBJ method. Second, the mechanism for generation and maintenance of disturbances is investigated by using the nonlinear equations and the general physical laws. Finally, some numerical experiments are given for illustration, showing the rapid absorption of disturbances by the jet-like zonal flow in one case and the maintenance of disturbances for a long time in the other case.     

南方夏秋干旱期间的天气气候特征

对40多年来南方的天气气候特征进行了分析,提出了7～9月夏秋干旱期形成干旱的主要天气系统为西太平洋副热带高压.从干燥度和降水的空间分布综合分析,得出了南方最旱区位于湖南、江西中部.广西、贵州、湖南西北和东南山区、江西南部山区、安徽南部山区、福建-浙江沿海交界山区和苏北沿海为湿润区,人工增雨潜力较大.特殊地形所形成的焚风效应是形成湘中干旱不可忽略的原因.为南方夏秋期间对流云降水潜力研究和科学实施人工增雨作业提供一定依据.     

业务流程个性化和可视化的实现

引入面向对象设计的思想，提出了业务流程组件的概念，通过通用的业务流程组件的建模，并将其参数化而使得业务流程平台成为根据用户权限而可以自由进行可视化组装的工作平台。设计了新的会商流程，实现了天气预报会商的多媒体化，同时输出多媒体的天气预报幻灯片，作为台站之间交流的信息产品。