A comprehensive approach to drought and desertification in Northern Nigeria

Drought has been a recurring feature of the arid and semi-arid areas of Nigeria. This paper reviews the extent, severity, and consequences of drought and desertification in Nigeria with particular emphasis on the northern part of the country. The haphazard manner in which these environmental hazards have been tackled is examined and a systematic approach for the formulation of a national policy is proposed. It is recommended that a detailed formulation and implementation of the proposed policy plan is imperative to mitigate the often devastating impacts of drought and desertification in the very prone areas of Nigeria. Until such is done, some areas of Nigeria will always be vulnerable to the whims of an inevitable climatic hazard of drought and associated land degradation in the form of desertification.     

地理信息系统支持区域土地利用决策的研究

本文以江苏省溧阳县为例,研究地理信息系统技术在区域土地利用多目标规划中的应用,着重探讨地理信息系统支持的区域土地利用决策原理和方法。研究表明,在地理信息系统的支持下,通过单项适宜性评价模型和生产布局决策模型的建立与运行,可以有效地进行研究区合理的土地利用布局和为区域土地管理提供依据。     

对我国国土规划几个主要问题的重新认识

本文基于对我国国土规划近十年实践中所反映的问题的分析,阐述了应改变国土规划的基本性质、以空间结构布局为其核心内容,以及国土规划一般不宜在市域或地区及以下地域层次开展的观点,进而就国土规划特性新的内涵、国土规划的内容重点等问题进行了初步探讨。     

巴黎大都市区商业的发展及其新近的变化

阐述了近二十年来巴黎大都市区商业所经历的巨大增长和迅速变化。     

Mine ventilation planning in the 1980s

Conclusions In this paper, the author has attempted to trace the development of mine ventilation planning from the traditional, manual and largely empirical methods of the past to the numerate computer-based techniques of the 1980s.The computer revolution has changed the face of many engineering disciplines, not least mine environmental engineering. Nevertheless, the mining industries of the world have not all been equally progressive in adapting to the flexibility, power and practical utilization of the new methodologies. It is, for example, incongruous that current textbooks on mine ventilation separate completely the topics of network analysis and ventilation planning with very little cross-referencing. Many of the current generation of mine ventilation engineers recognize the need to know about computers but find difficulty in translating this into their daily work. The growing availability of self-teaching, friendly software for personal microcomputers, coupled with interactive graphics, will assist greatly in promoting uncomplicated but powerful usage of computers.Young engineers now graduating from universities and colleges have been brought up in a computer-oriented environment and are competent in interacting with these machines. Indeed, they wonder how the job was ever done without magnetic data bases and high-speed computation aid.     

把握新机遇实现新发展为实现我局"十五"改革发展目标任务而努力奋斗

这次会议是进入新世纪我局第一次工作会议,是一次总结过去,谋划未来的重要会议,开好这次会议对我局在新世纪实现新发展有着十分重要的意义.会议的主要内容是认真学习温家宝副总理的重要讲话精神,总结回顾"九五"地矿工作改革发展的基本情况,讨论修改我局"十五"改革发展纲要、"十五"前三年经济责任制考核办法和精神文明建设考核办法,安排部署2001年工作.下面我代表局党组作工作报告.     

三维地理信息数据在移动通信网络规划和优化系统中的应用

随着移动通信的迅猛发展,网络规模不断扩大,借助数字地图,尤其是三维地理信息数据进行网络规划和优化已变得越来越重要。本文主要介绍三维地理信息数据在建立移动通信网络规划和优化系统中的应用。     

昆明市盘龙区世博片区2010年环境规划设计

针对昆明市盘龙区世博片区的环境现状和环境功能区分区，对昆明市盘龙区世博片区进行了5年环境规划设计，介绍了世博片区环境规划设计的程序和方法，完成了昆明市盘龙区世博片区环境规划设计方案，提出噪声控制、汽车尾气治理排放、油漆厂水污染物的削减、生活燃煤的替代和排烟脱硫技术的引进、世博片区周边常住人口的总量控制，是确保世博片区环境功能区——环境重点保护地区达标的主要途径和措施，并进一步探讨了当前环境规划设计存在的问题。     

离散型人口发展模型在土地规划中的应用

人口预测是编制土地利用总体规划的基础性研究工作，以离散型人口发展模型，应用在广西田阳县土地利用总体规划中，得出了很好的结果。