谈北海市的水资源

北海市，因其得天独厚的自然资源与区位优势，被列入我国改革开放最早的14个沿海城市之一，这其中，也得益于较丰富的淡水资源，特别是低成本开发的地下水资源。在开放初期，它为当地政府节约了十分宝贵的资金，在北海的发展中，功不可没。但容易得来的“资源”，也带来了一些负面效应，使人错认为地下水资源是取之不尽用     

板状铀矿床的新模式

本文概述了板状铀矿床的共性特征，初步明确了板状铀矿床的概念及归属划分。以典型矿床为例，着重从水文地质角度，利用地下水流动机制和密度分层流体界面理论提出了板状铀矿床的成矿模式。较全面地阐述了地下水排泄体系中成岩－成矿的时间序列和空间定位。     

Characters of the Pco2 and CO2 Flux in the East China Sea in Autumn

Pco2 of air and seawater samples from the East China Sea(ECS) were measured in situ in autumn, 1994,Ocean currents,terrestrial fluviation,biological activities,etc.,Pco2 char-acters in air and seawater were investigated,CO2 flux and its character in the East China Sea are discussed on the basis of the Pco2 profiles of air and seawater,It was clear that the nearshore was the source of CO2;and tht the oulter sea area was the sink of CO2; and that the shelf area of the EXS is a net sink for atmospheric CO2 in autumn.     

复杂模型重力位场快速正反演方法及应用

提要 本文详细讨论了一种三维重力位场快速正反演方法。作者在前人工作的基础上,对算法作了行之有效的改进,通过对反演中的不稳定因素进行各种理论模型试算,得出保证迭代反演稳定收敛的准则,编制出可在微型机IBM—PC上运行的人机对话式自动正反演程序。本文还对各种不均质模型进行了模似计算并将该方法应用于某含油气沉积盆地的双层界面构造研究,揭示出了储油有利地段。     

Development and Extension of Seawater Desalination by Reverse Osmosis

Seawater desalination has been people‘s fond dream since ancient times,the dream is now becoming a reality.This paper presents a brief development history of reverse osmosis.Much attention was paid to innovative development in mebranes,modules.equipments and applied technology,including asymmetric and composite membranes,spiral-wound element and hollow fiber module,energy recovery equipments and different technological processes.The extension of reverse osmosis,such as desalination,pre-concentration,integrated processes and nanofiltration,is also briefly mentioned.