基于发展方程的人口系统预测和分析

针对我国人口现状,采用微分方程模型对人口总量、老年人口数量和老龄化指数进行了预测,预测结果表明人口总量和老年人口数在短期内都在不断增长,老年人口占人口总数的比重也在不断提高,该结果符合目前人口发展趋势,可以为相关人口政策的制定提供有力的数据支持。

人口预测子系统的设计与实现

未来人口状况是土地利用总体规划中调整土地利用结构、确定各类用地控制性指标的重要依据.人口发展与土地需求量密切相关,要预测规划期间土地需求量,首先必须对人口的发展状况作出预测.本文总结了常用的人口预测的数学模型,并利用这些数学模型进行了县级人口预测子系统方案的设计,目的是利用计算机来处理人口预测中一些复杂的数学计算和数据整理,为编制土地利用总体规划提供重要的数据.

Implications of Urban Growth on Domestic Water Consumption： A Case Study of Jorhat Town, India

This paper tries to embraces the urban growth in Jorhat town and its implications on water consumption at household＇s level. Urban growth is measured through the increase in the number of population and the aerial extent. It is a pathetic situation for Jorhat residents in case of domestic water consumption that due to rapid increase of population in the town, the existing water supply systems cannot cope with the current demand. So, the people of the town always struggle to collect water from other sources such as River Bhogdoi, ponds, dug well, water vendor etc., moreover, try to satisfy the limited daily household needs. The methodology adopted in this paper is involved on both primary and secondary data. The primary data has been collected through household survey pertains to 600 households from each of 19 municipal wards in Jorhat town in both pre and post monsoon seasons. To highlight the growth of population and population projection, the compound rate of growth method has been used and it is tried to link with the future water demand in Jorhat town,