滇东南老君山地区卫星图象的地质解译及效果

滇东南地区老君山花岗岩体及其周围是以成锡矿为主的多金属成矿区,但地处边境,自然条件比较恶劣,工作条件比较困难,长期以来区域地质研究甚浅。美国陆地卫星图象的应用,为宏观地质研究,特别是区域构造的分析,提供了一个有力的手段。1982年笔者等对老     

硬质合金使用技术座谈会简介

本文系我所代表在参加“硬质合金使用技术座谈会”后所编写的简介。文中扼要地介绍了目前我国硬质合金的生产使用动态,以及硬质合金使用的经验交流情况。当时由于我部其他有关单位没有参加这次会议,因此在这里选登出来以供参考。     

Meteorological Features of Flash-Flood -Producing Rainstorms in the Yujiang River near Nanning City

郁江南宁段致洪气象特征的分析表明, 热带气旋影响左、右江流域是致洪的主要原因; 洪峰出现前的第９ 到第５ 天的流域降雨量对洪水的形成具有最重要的作用。     

中国近海海洋水文气候区划──Ⅰ．主因子分析

根据中国近海历年高校资料，选取了１９个对海洋水文气候有影响的要素特征值，用Ｒ型主因子分析方法，找出６个主要综合因子，其累积方差贡献率为９１．０６％，充分反映了原有的信息。对这６个主因子的因子载荷矩阵作方差最大正交旋转，使各主因子的载荷值向１或０两级分化。结果表明，第一主因子Ｆ１是由海洋热量状况起主导作用的，第二主因子Ｆ２主要受海底地形的影响。其余的主因子Ｆ３，…，Ｆ６分别受平均最低水温出现旬期、表     

THE FITTING FOR WEIBULL AND ANNUAL EXTREME WIND SPEED EMPIRICAL DISTRIBUTIONS AND A NUMERICAL SOLUTION FOR ESTIMATING ITS PARAMETERS

Having answered the question why the empirical frequency curve of annual extreme wind speeds at Tanggu, Tianjin of China does not fit the Pearson-Ⅲ type, the authors obtained a better fitting for the Weibull distribution through extremum analysis, and found out a better numerical solution for estimating the Weibull distribution parameters by a new iterative technique. The fitting results of annual extreme wind speed have been proved to be quite satisfactory by using the x2 criterion and Kolmogorov criterion.     

厦门港莹虾的组成、个体大小和性比率

本文探讨了厦门港莹虾类的种类组成及季节分布,并对其中的优势种亨生莹虾的数量、体长组成和性比率的季节变化进行研究,供今后开展莹虾的种群生态研究参考。一、材料与方法样品是1963年5月至1965年1月定期(每月农历初八、十五、二十三和三十日20∶00—20∶30)在厦门港的鹭江水道采集的。采集时船只固定在港中,依靠海水涨退的水流拖表层浮游生物。以粗、中、细三种网具(分别用30GG、60GG和XX10号的筛绢做成口径37mm的定性浮游生物网)各拖10min。标本用5%福马林海水固定保存。由于条     

Study on Floating Properties and Stability of Air Floated Structures

In this paper, the buoyancy, kinetic properties and stability of air floated structures have been studied by theoretical and experimental methods. The ecpjations for calculation of the buoyancy of the air floated buoy are derived according to the Boyler law and the equilibrium equations of the air floated structure are established. Through simplification of the air floated structure as a single freedom rigid body and spring system, the natura! period of heaving and some kinetic properties are discussed. In the stability analysis, the formulas for calculation of the meta centric height are presented. The theoretical results are in good agreement with the data observed from the model test and prototype test. The air buoyancy de-crease coefficient presented in this paper has a large influence on the floating state, stability and dynamic properties of the air floated structure. The stability of the air floated structure can also be judged by the parameter of meta centric height, and calculations show that t