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mflood-source
自己做的一个ns-2下的flood仿真程序演示结果(a flood protol for wsn in ns2 simulator.)
- 2010-10-19 12:24:36下载
- 积分:1
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renkoumoxing
本文区别于其他传统的人口预测模型,深入分析了当前中国人口的基本情况,以及
最近几年中国人口的发展情况与趋势,针对中国人口基数大、男女比例不协调、乡村人
口城镇化加速、人口老龄化日益严重等显著特点,在各年龄段生育率短期内保持不变的
假设下,建立基本的人口转移回归模型,用于模拟预测短期内中国各类人口数量发展变
化。该模型预测结果显示,中国人口在未来十几年内增长一定幅度后开始下降;与此同
时,人口老龄化、男女比例失调等问题日益严重。该模型短期内的预测效果比较好。
为了使中国将来的人口发展健康、平衡,综合考虑中国以及欧洲一些发达国家和亚
洲一些实行计划生育较早的国家以前以及当前的一些情况,本文提出了修改计划生育政
策的建议。面对日益严重的老龄化现象,我们提出生育率应该参考老龄人口比例这一新
思想,并建立生育率与老龄人口比例的关系模型,用于长期人口的预测。预测结果显示
中国总人口在短期内持续上升,在2025 年到2040 年之间基本保持在14.6 亿的最大值,
然后开始缓慢下降。
两个模型的结果均显示,中国将会面临严重的老龄化和男女比例不协调两个问题。
最后我们提出了适当措施以缓和这两个问题带来的影响。(This is different from other traditional population projection model, in-depth analysis of the current basic situation of China s population, and
In recent years the development of China s population and the trend for China s huge population, gender disharmony, rural people
I accelerated urbanization, the growing aging population and other significant features in the short term fertility of all ages remain unchanged
Assumption, the establishment of basic population transfer regression model, to simulate and predict the short term development of China s various types of population change
Of. The predicted results show that China s population growth in the next decade began to decrease after a certain extent and the same
When an aging population, gender imbalance and other growing problem. The model predicted the short-term results were better.
To make the development of China s future population health, balance, considering China and some developed countries in Europe and A)
- 2010-05-13 11:54:40下载
- 积分:1
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Super_Resolutionbased
超分辨率的基础书籍,要学习超分辨率的同学可以看看,很好的(Super-resolution based books, the students should learn to look super-resolution, very good)
- 2011-05-26 19:11:24下载
- 积分:1
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GeneralizedDaubechiesWavelets
here is matlab algorithms for Daubechies Wavelet transform that one can use in engineering applications, type winrar zip archive,8.42 KB
- 2011-11-24 21:49:23下载
- 积分:1
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yuanzhen
20圆环阵的波束方向图,包括xy面和xz面的方向图。(Twenty circular array beam pattern, including the direction and the xy plane xz plane.)
- 2014-06-21 17:05:13下载
- 积分:1
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gab
使用matlab编写的Gabar滤波器代码(Gabor filter written by matlab)
- 2011-01-20 15:28:39下载
- 积分:1
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ch1
雷达系统专业基本功能分析,基本系统功能源代码。(the source code to Radar System,the basic souce code.analysis and simulation.)
- 2010-03-03 19:54:13下载
- 积分:1
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matlab-RLSaLMS
自适应信号处理中LMS算法和RLS算法的比较仿真(Adaptive signal processing in the LMS algorithm and RLS Algorithms Simulation)
- 2011-06-20 16:38:17下载
- 积分:1
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cylinder
计算流体动力学的计算小程序,计算二维圆柱绕流问题,同时绘制流场速度云图。(Calculation procedures computational fluid dynamics to calculate the two-dimensional cylindrical flow around the same time draw the flow velocity cloud.)
- 2012-05-29 19:05:17下载
- 积分:1
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tanxinrenzhi
动态管理频谱分配的代码,在matlab开发环境下,简单计算频谱分配法则贪心法(Dynamic management of spectrum allocation code in the MATLAB development environment, a simple calculation spectrum allocation rules greedy method)
- 2021-02-21 16:39:42下载
- 积分:1