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Leslie人口增长模型
本文建立了我国人口增长的预测模型，对各年份全国人口总量增长的中短期和长期趋势作出了预测，并对人口老龄化、人口抚养比等一系列评价指标进行了预测。最后提出了有关人口控制与管理的措施。模型Ⅰ：建立了Logistic人口阻滞增长模型，利用附件2中数据，结合网上查找补充的数据，分别根据从1954年、1963年、1980年到2005年三组总人口数据建立模型，进行预测，把预测结果与附件1《国家人口发展战略研究报告》中提供的预测值进行分析比较。得出运用1980年到2005年的总人口数建立模型预测效果好，拟合的曲线的可决系数为0.9987。运用1980年到2005年总人口数据预测得到2010年、2020年、20
- 2020-12-11下载
- 积分：1
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fastmap
可编程器件编程软件fastmap................(Programmable logic device programming software fastmap)
- 2021-02-03 15:30:00下载
- 积分：1
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Huong-dan
A distributed denial-of-service (DDoS) attack occurs when multiple systems flood the bandwidth or resources of a targeted system,
- 2015-11-12 15:30:44下载
- 积分：1
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demo_collect
demo source code of using collect in Micrsoft Visual C++.Net 2003(demo source code of using collect in Micrso Visual C ft. Net 2003)
- 2007-06-21 17:12:22下载
- 积分：1
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poj3941
poj 3941
Hideyuki is allowed by his father Ujisato some 1000 yen bills every month for his pocket money. In the first day of every month, the number of bills is decided as follows. Ujisato prepares n pieces of m-sided dice and declares the cutback k. Hideyuki rolls these dice. The number of bills given is the sum of the spots of the rolled dice decreased by the cutback. Fortunately to Hideyuki, Ujisato promises him to give at least one bill, even if the sum of the spots does not exceed the cutback. Each of the dice has spots of 1 through m inclusive on each side, and the probability of each side is the same.
In this problem, you are asked to write a program that finds the expected value of the number of given bills. (poj 3941 Hideyuki is allowed by his father Ujisato some 1000 yen bills every month for his pocket money. In the first day of every month, the number of bills is decided as follows. Ujisato prepares n pieces of m-sided dice and declares the cutback k. Hideyuki rolls these dice. The number of bills given is the sum of the spots of the rolled dice decreased by the cutback. Fortunately to Hideyuki, Ujisato promises him to give at least one bill, even if the sum of the spots does not exceed the cutback. Each of the dice has spots of 1 through m inclusive on each side, and the probability of each side is the same. In this problem, you are asked to write a program that finds the expected value of the number of given bills.)
- 2013-07-16 20:45:28下载
- 积分：1
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RTKLIB精密单点定位代码(支持北斗、GPS).rar
为初学者做RTKlib精密单点定位PPP提供一定的参考（更改后的代码），支持北斗、GPS 三频、双频以及组合PPP，误差项仍需改正
- 2019-09-01下载
- 积分：1
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ModbusTCP
Codesys V3.5 上用syssockets23库实现的ModbusTCP Server源码(The source code for ModbusTCP Server by using Syssockets23 library in Codesys V3.5)
- 2020-10-19 10:27:26下载
- 积分：1
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ip函数,ip地址比较，checksum等函数
ip函数,ip地址比较，checksum等函数-ip function, ip address comparison, function and so on checksum
- 2022-12-25 16:30:03下载
- 积分：1
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浮点数乘法器，verilog
浮点数乘法器,verilog,可直接综合
- 2020-12-05下载
- 积分：1
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简单图像显著性特征提取matlab代码
简单图像显著性特征提取matlab代码，代码仅有几行，很容易实现,效果比较明显。
- 2020-12-06下载
- 积分：1
