试论新世纪地理信息科学的发展

本文重点分析了当前国内外地理信息科学的形成与发展趋势和地理信息科学不断发展的历程 ,提出近期发展的前沿 ,以及当前地理信息产业化面临的一些重要问题。最后提出对地理信息科学发展的意见。     

MATLAB在运用系统建模处理南海气象数据过程中应用

介绍了MATLAB语言特点和系统建模方法的基本理论.根据南海气象数据的实际建模处理过程,给出了建模的详细步骤及其MATLAB实现过程以及MATLABTM的主要实现程序.试验讨论和结果表明利用MATLAB语言可以方便地对南海气象数据用系统建模方法进行建模和处理,MATLAB在运用系统建模法处理南海气象数据方面具有明显的优越性.     

鹤壁等6个矿区被列入国家大型煤炭基地建设规划

本刊讯 近日，国家发改委组织中煤国际工程研究总院等设计、咨询单位编制了大型煤炭基地建设规划，全国共设立13个大型煤炭基地，由98个矿区组成，其中河南基地由鹤壁、焦作、义马、郑州、平顶山、永夏6个矿区组成。     

水热条件下配合物水解及可逆与不可逆反应

水热条件下配合物水解及可逆与不可逆反应王玉荣（中国科学院广州地球化学研究所，广州５１０６４０）关键词配合物水解，可逆与不可逆，实验研究水解作用是水参与地球化学反应过程中最普遍最重要的化学反应过程。天然矿物大多是不可逆反应的产物。红海海底现代沉积铁矿是...     

YTI-A视频时码插入器的研制

在人造卫星观测的ＣＣＤ图象记录中，为方便图象保存，查阅及图象处理，将图象记录中的相关信息插入记录的图象中是十分重要的。ＹＴＩ－Ａ视频时码插入器正是为此应用而设计。本仪器内有一个可自动与后面板输入秒同步到１μｓ的数字钟。记录日期包括年月日，时刻记录精度为１０μｓ，望远镜指向（Ａ，ｈ）的记录精度为１″。这些信息全部以二种格式被插入记录的图象中可供图象处理时查阅和快速读出。文中叙述了仪器原理及应用     

ANALYSIS OF DRIVING FORCES ON THE CHANGE OF HISTORICAL FARMLAND USE IN SHANDONG PROVINCE DURING THE QING DYNASTY （1644-1911）

How land-cover has been changed by human use over the last 300 years is one of the five overarching questions guiding the Land-use/Cover Change (LUCC) Science/Research Plan. China has variety of historical docu-ments providing unique data superiority. So the characteristics of farmland area in Shandong Province during the Qing Dynasty (1644-1911) are summarized firstly: 1) the rising trend of farmland area was striking; 2) farmland area had re-markable fluctuation; 3) farmland area per capita decreased dramatically; 4) wasteland reclamation index increased rapidly. Then, the driving forces of farmland area change are analyzed. It is concluded that natural and human factors are jointly influential. Among the driving forces, human dimensions are the main factors of farmland area change,which direct the general tendency of the changes mentioned above. And the natural factors influence the stability of farmland area as well. Variation of the natural factors would act as the major contributory factor to farmland area change during years or periods of abrupt climatic changes, or during the intensive occurring periods of natural hazards.Besides, the passive aspects of human factors, such as war chaos also influenced the fluctuation of the farmland area.This research indicates that it is feasible to study the land-use/cover change by Chinese historical literatures, which has huge potential to provide a comprehensive picture of the growing dominance of human land-use and land-cover pat-terns that can be used in many global change research oroiects.     

疏散星团的最新研究进展

疏散星团在天文学和天体物理学研究中有着多方面的重要性。近年来在观测和理论工作上都取得了显著的进展。综述了疏散星团的研究现状，对成员判别、基本参数确定、团与恒星的演化、团的结构和动力学进行了详细评述。