CnOpenData人口统计CnOpenData

时间区间

1960-2021


字段展示

人口统计-英文字段人口统计-中文字段指标说明
Country/Area国家/地区
Code代码
ContinentCode大陆板块代码
Year年份
Population size, in millions人口规模,百万Definition: Total population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship. The values shown are midyear estimates.
Percent urban population城市人口百分比Definition: Urban population refers to people living in urban areas as defined by national statistical offices. The data are collected and smoothed by United Nations Population Division.
Population density, people per square km人口密度,每平方公里人口Definition: Population density is midyear population divided by land area in square kilometers. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin. Land area is a country's total area, excluding area under inland water bodies, national claims to continental shelf, and exclusive economic zones. In most cases the definition of inland water bodies includes major rivers and lakes.
Population ages 65 and above, percent of total65岁及以上人口,占总人口的百分比Definition: Population ages 65 and above as a percentage of the total population. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.
Population ages 0-14, percent of total0-14岁人口,占总人口的百分比Definition: Total population below the age of 14 as a percentage of the total population. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.
Female population, percent of total女性人口占,占总人口的百分比Definition: Female population is the percentage of the population that is female. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.
Rural population, percent of total population农村人口,占总人口的百分比Definition: Rural population refers to people living in rural areas as defined by national statistical offices. It is calculated as the difference between total population and urban population.
Dependent people as percent of the working age population受扶养人占劳动年龄人口的百分比Definition: Age dependency ratio is the ratio of dependents--people younger than 15 or older than 64--to the working-age population--those ages 15-64. Data are shown as the proportion of dependents per 100 working-age population.
Refugee population难民人口Definition: Refugees are people who are recognized as refugees under the 1951 Convention Relating to the Status of Refugees or its 1967 Protocol, the 1969 Organization of African Unity Convention Governing the Specific Aspects of Refugee Problems in Africa, people recognized as refugees in accordance with the UNHCR statute, people granted refugee-like humanitarian status, and people provided temporary protection. Asylum seekers--people who have applied for asylum or refugee status and who have not yet received a decision or who are registered as asylum seekers--are excluded. Palestinian refugees are people (and their descendants) whose residence was Palestine between June 1946 and May 1948 and who lost their homes and means of livelihood as a result of the 1948 Arab-Israeli conflict. Country of asylum is the country where an asylum claim was filed and granted.
Migrant population, percent of total population流动人口,占总人口的百分比Definition: International migrant stock is the number of people born in a country other than that in which they live. It also includes refugees. The data used to estimate the international migrant stock at a particular time are obtained mainly from population censuses. The estimates are derived from the data on foreign-born population--people who have residence in one country but were born in another country. When data on the foreign-born population are not available, data on foreign population--that is, people who are citizens of a country other than the country in which they reside--are used as estimates. After the breakup of the Soviet Union in 1991 people living in one of the newly independent countries who were born in another were classified as international migrants. Estimates of migrant stock in the newly independent states from 1990 on are based on the 1989 census of the Soviet Union. For countries with information on the international migrant stock for at least two points in time, interpolation or extrapolation was used to estimate the international migrant stock on July 1 of the reference years. For countries with only one observation, estimates for the reference years were derived using rates of change in the migrant stock in the years preceding or following the single observation available. A model was used to estimate migrants for countries that had no data.
Population growth, percent人口增长,百分比Definition: Annual population growth rate for year t is the exponential rate of growth of midyear population from year t-1 to t, expressed as a percentage . Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.

样本数据

Country/AreaCodeContinentCodeYearPopulation size, in millionsPercent urban populationPopulation density, people per square kmPopulation ages 65 and above, percent of totalPopulation ages 0-14, percent of totalFemale population, percent of totalRural population, percent of total populationDependent people as percent of the working age populationRefugee populationMigrant population, percent of total populationPopulation growth, percent
国家/地区代码大陆板块代码年份人口规模,百万城市人口百分比人口密度,每平方公里人口65岁及以上人口,占总人口的百分比0-14岁人口,占总人口的百分比女性人口占,占总人口的百分比农村人口,占总人口的百分比受扶养人占劳动年龄人口的百分比难民人口流动人口,占总人口的百分比人口增长,百分比
AfghanistanAFGAS19608.628.42.842.1448.3291.680.05
AfghanistanAFGAS19618.798.68132.8142.4548.4191.3280.221.93
AfghanistanAFGAS19628.978.98142.842.6448.591.0280.42.01
AfghanistanAFGAS19639.169.28142.7942.7548.5890.7280.722.08
AfghanistanAFGAS19649.369.59142.7542.8548.6690.4181.222.14
AfghanistanAFGAS19659.579.9152.7142.9848.7390.181.992.22
AfghanistanAFGAS19669.7810.23152.7243.3348.7989.7782.952.25
AfghanistanAFGAS196710.0110.57152.7243.6348.8589.4383.912.29
AfghanistanAFGAS196810.2510.92162.743.9148.9189.0884.842.35
AfghanistanAFGAS196910.4911.27162.6744.1448.9688.7285.762.38
AfghanistanAFGAS197010.7511.64162.6344.3349.0188.3686.642.43
AfghanistanAFGAS197111.0212.02172.6444.6749.0687.9887.492.42
AfghanistanAFGAS197211.2912.41172.6344.9449.1187.5988.312.43
AfghanistanAFGAS197311.5812.81182.6145.1449.1587.1989.112.52
AfghanistanAFGAS197411.8713.22182.5845.2849.1886.7889.892.51
AfghanistanAFGAS197512.1613.64192.5545.3549.286.3690.662.39
AfghanistanAFGAS197612.4314.07192.5645.6349.2185.9391.42.18
AfghanistanAFGAS197712.6914.52192.5545.8749.2185.4892.122.09
AfghanistanAFGAS197812.9414.97202.5246.0649.2185.0392.821.96
AfghanistanAFGAS197912.9915.44202.4946.1849.284.5693.510.37
AfghanistanAFGAS198012.4915.99192.4346.1849.188494.16-3.92
AfghanistanAFGAS198111.1616.56172.4546.4649.1483.4494.79-11.28
AfghanistanAFGAS198210.0917.15152.4546.7249.182.8595.37-10.05
AfghanistanAFGAS19839.9517.75152.4146.9649.0482.2595.83-1.37
AfghanistanAFGAS198410.2418.36162.3547.224981.6496.242.89
AfghanistanAFGAS198510.5119162.2447.5848.978196.652.59
AfghanistanAFGAS198610.4519.65162.2747.7448.9780.3597.08-0.61
AfghanistanAFGAS198710.3220.31162.2947.784979.6997.49-1.21
AfghanistanAFGAS198810.3821162.347.849.027997.920.59
AfghanistanAFGAS198910.6721.09162.2947.9348.9978.9198.362.75
AfghanistanAFGAS199010.6921.18162.2348.3148.8878.8298.89500.2
AfghanistanAFGAS199110.7521.27162.2448.2248.7178.7399.56380.47
AfghanistanAFGAS199212.0621.35182.2648.1348.4978.64100.36002511.52
AfghanistanAFGAS19931421.44212.2848.0948.378.56101.073213114.96
AfghanistanAFGAS199415.4621.53242.3248.0248.1878.47101.99191349.86
AfghanistanAFGAS199516.4221.62252.3747.8248.1478.38103.03196056.05
AfghanistanAFGAS199617.1121.71262.3748.0748.1878.29104.14187794.1
AfghanistanAFGAS199717.7921.81272.3648.3448.2878.19105.2953.91
AfghanistanAFGAS199818.4921.9282.3448.5548.478.11106.423.88
AfghanistanAFGAS199919.2621.99302.3248.7348.5178.01107.474.08
AfghanistanAFGAS200019.5422.08302.2948.8948.5677.92108.351.44
AfghanistanAFGAS200119.6922.17302.2748.8248.5577.83108.99100.74
AfghanistanAFGAS20022122.26322.2648.6548.4977.74109.356.45
AfghanistanAFGAS200322.6522.35352.2448.4148.4277.65109.45247.54
AfghanistanAFGAS200423.5522.5362.2348.1548.3877.5109.29313.93
AfghanistanAFGAS200524.4122.7372.2347.8648.3977.3107.96313.58
AfghanistanAFGAS200625.4422.91392.2547.9948.4677.09106.33344.14
AfghanistanAFGAS200725.923.11402.2748.1348.5776.89108.34431.79
AfghanistanAFGAS200826.4323.32412.2948.2348.6876.68109.24372

数据更新频率

年度更新

内容概要:本文围绕六自由度机械臂的人工神经网络(ANN)设计展开,重点研究了正向与逆向运动学求解、正向动力学控制以及基于拉格朗日-欧拉法推导逆向动力学方程,并通过Matlab代码实现相关算法。文章结合理论推导与仿真实践,利用人工神经网络对复杂的非线性关系进行建模与逼近,提升机械臂运动控制的精度与效率。同时涵盖了路径规划中的RRT算法与B样条优化方法,形成从运动学到动力学再到轨迹优化的完整技术链条。; 适合人群:具备一定机器人学、自动控制理论基础,熟悉Matlab编程,从事智能控制、机器人控制、运动学六自由度机械臂ANN人工神经网络设计:正向逆向运动学求解、正向动力学控制、拉格朗日-欧拉法推导逆向动力学方程(Matlab代码实现)建模等相关方向的研究生、科研人员及工程技术人员。; 使用场景及目标:①掌握机械臂正/逆运动学的数学建模与ANN求解方法;②理解拉格朗日-欧拉法在动力学建模中的应用;③实现基于神经网络的动力学补偿与高精度轨迹跟踪控制;④结合RRT与B样条完成平滑路径规划与优化。; 阅读建议:建议读者结合Matlab代码动手实践,先从运动学建模入手,逐步深入动力学分析与神经网络训练,注重理论推导与仿真实验的结合,以充分理解机械臂控制系统的设计流程与优化策略。
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