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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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duff_for_sin
基于maglab/simulink平台设计的利用duffing振子检测微弱正弦信号，非常好的一个源程序，自己亲自调试，运行在matlab2012b上没有问题，仿真步长0.01s,采用RK四阶算法。若有问题，欢迎指教(Based maglab/simulink platform using duffing detect weak sinusoidal oscillator signal, a very good source, personally commissioning, operation without problems on matlab2012b, simulation step 0.01s, using the fourth-order RK algorithm. If questions, please advise)
- 2014-01-04 09:54:06下载
- 积分：1
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SPT
说明： 用启发式SPT规则求解混合流水车间调度方案(Solving Hybrid Flow Shop Scheduling Scheme with Heuristic SPT Rules)
- 2021-03-31 20:29:08下载
- 积分：1
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work
对超声电机摩擦驱动的仿真，是基于赫兹模型的(Friction of ultrasonic motor-driven simulation, is based on Hertz model)
- 2007-11-25 17:19:50下载
- 积分：1
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wavelet-energy
小波变换获得细节和逼近子图，再求子图能量 用L1范数来求(wavelet transform energy)
- 2013-05-09 17:32:53下载
- 积分：1
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MATLAB-control-application
对MATLAB软件在控制领域的应用进行了详细介绍。内容包括使用DAS工具箱函数和ActiveX控件设计数据采集与控制程序；使用串口I/O流和MSComm控件设计串口通信程序等。每种程序设计方法都提供了多个典型应用实例，每个实例都提供了线路图、详细的程序设计步骤和完整的源代码可供自动化、计算机应用、电子信息、机电一体化、测控仪器等专业的大学生、研究生及相关技术人员学习和参考。 (MATLAB software in the control area of the application in detail. Content including the use of ActiveX controls DAS Design Toolbox functions and data acquisition and control procedures use the serial port I/O design flow and MSComm control serial communication procedures. Each programming methods provide a more typical application, each instance provides a road map, detailed program design steps and the complete source code for automation, computer applications, electronic information, mechanical and electrical integration, measurement and control instruments professional students, graduate students and relevant technical staff to learn and reference.)
- 2011-01-06 19:03:43下载
- 积分：1
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sprtv2
sprt code in matlab. sprt can isolate the change of variance in a signal.
- 2013-03-20 00:48:12下载
- 积分：1
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KalmanAll
说明： 关于卡拉曼滤波的~运动目标状态估计方法的研究(Karaman filter on ~ moving target state estimation method for)
- 2010-04-12 10:14:36下载
- 积分：1
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Monte-Carlo-simulation-Matlab-code
Monte Carlo simulation Matlab code
- 2011-05-15 06:35:51下载
- 积分：1
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Interference_Suppression
瞬时干扰抑制matlab代码，压缩包，包括算法和调用实例(Instantaneous interference suppression matlab code compression package, including algorithms and sample call)
- 2020-07-04 03:40:02下载
- 积分：1
